JP2005275540A - Earthquake disaster prevention system and earthquake disaster prevention communication method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an earthquake disaster prevention system and an earthquake disaster prevention communication method that enable quick information communication in an earthquake by effectively using modems or receivers with fewer lines or channels to many earthquake remote-monitoring devices while reducing communication costs and equipment costs by using, for example, general telephone lines. <P>SOLUTION: Each of the earthquake remote-monitoring devices 30, if failing to ensure a communication state by a single call to one of the modems 60, succeedingly tries a call to a call-untried modem or receiver different from the modem 60 with which the call has failed to ensure a communication state. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an earthquake disaster prevention system that collects information such as the damage status at the time of an earthquake in a gas piping network and remotely operates a shut-off valve device, and an earthquake that performs calling and polling to start communication in the earthquake disaster prevention system. It relates to disaster prevention communication methods.

  Conventionally, for example, in a piping network for transporting fluids such as city gas, a seismic device is installed at each base where a governor is installed in the piping network. Information to support disaster prevention activities in the event of an earthquake by measuring (detecting) data such as SI values or vibration acceleration using a seismic device as information related to earthquake motion using a remote monitoring device during earthquakes and collecting information related to the earthquake motion Collection methods and systems have been proposed. For example, a system has been proposed in which an earthquake information collection device provided in a gas management company collects data via communication means such as a wireless or dedicated line or a general telephone line.

  More specifically, for example, when an earthquake motion of a predetermined magnitude or more is detected, the earthquake information collection device automatically determines that an earthquake has occurred, and the magnitude of the earthquake motion such as the SI value detected at that time is detected. Starting with this value, various information such as the state of the governor being shut off, the pressure value and flow rate of the fluid being transported, the broken state of the piping, and the occurrence of leakage were collected from each site.

  There is also a technology that estimates the occurrence of damage based on the value of the magnitude of ground motion such as the SI value detected when an earthquake occurs and the record of statistical facts at the time of past earthquakes. It was proposed.

Here, for example, a city gas piping network generally has a complicated geographical arrangement over a wide area. For this reason, it is desirable to collect information from as many sites as possible in order to realize accurate and reliable disaster prevention in the event of an earthquake. For example, pressure control valve devices and shut-off valve devices called so-called governors are installed at over 3000 locations for each important point in the city gas piping network laid in the southern part of the Kanto Plain. Seismic remote monitoring devices are attached to the governors at each location, and earthquakes are installed at the disaster monitoring centers installed at the headquarters of the company that manages the remote gas monitoring network and the city gas piping network, for example. It is necessary to communicate with the information collecting apparatus via the dedicated communication or the telephone line. In more detail, information on earthquake motion (SI and acceleration) at the time of earthquake occurrence, information on gas pressure value and flow rate, gas pressure drop due to piping damage, etc., information on shutoff status of shutoff valve device, shutoff It is necessary to communicate various information such as a command message or a control signal for performing remote shut-off control on the valve device.
JP 2001-116252 A (Detailed description of the invention as a whole) JP 2001-119497 A (Detailed description of the invention as a whole) JP 2002-253467 A (Detailed description of the invention as a whole) JP 11-84017 A (Detailed description of the invention as a whole)

  However, when an earthquake occurs, calls for exchanging information from an earthquake remote monitoring device arranged at an extremely large number of locations such as 3000 locations or more are concentrated on one earthquake information collecting device. . For example, assuming that the Great Hanshin-Awaji Earthquake occurred in the Kanto region, large seismic motions with a high probability of causing some damage to the piping network were observed at more than about 1000 locations, and automatic seismic seismic cutoff was performed accordingly. Expected to happen.

  In this way, when calls from a very large number of seismic remote monitoring devices are concentrated on the modem or receiving device of the earthquake information collecting device, communication is sequentially made for each call and all calls are made. There is a problem that it takes a very long time to complete each communication for the call. In this case, even if an attempt is made to speed up information collection by providing a corner, a general telephone line, or a dedicated communication means, it will not function effectively, which is inconvenient.

  In order to eliminate such inconveniences, it is possible to attach a plurality of modems and receivers to the earthquake information collection device. Alternatively, in order to enable communication without waiting for redialing, 3000 or more modems and receiving devices are attached to each remote monitoring device at the time of earthquake so as to correspond one-to-one. This requires a huge communication cost, equipment cost, etc., and this is actually a very difficult or impossible measure to implement.

  For this reason, it is effective to prepare several tens of modems or receivers for 3000 or more remote monitoring devices at the time of an earthquake and perform information communication as quickly as possible. The inventors have devised. In addition, the present inventors have devised that it is possible to reduce communication costs and equipment costs by performing information communication using a general telephone line.

  However, even if several tens of modems or receivers are prepared as described above, it is practically extremely difficult or impossible to realize rapid information communication unless there is a measure for effective communication using them. The inventors have confirmed that this is possible.

  For example, when using an ordinary telephone line to support 3000 seismic remote monitoring devices with 30 modems, calls from 100 seismic remote monitoring devices per modem are averaged. Including the time required to wait for redialing and time loss such as simultaneous calls from multiple remote monitoring devices during earthquakes, one by one for those many calls It takes a long time, such as 4 to 5 hours, to complete the communication after the communication.

  In addition, when an earthquake occurs, calls are issued from the remote monitoring devices at each location almost simultaneously immediately after the occurrence, but after that, for example, an abnormal change occurs in the gas pressure value due to, for example, gas leakage In such a case, an individual call is issued from the remote monitoring device at the time of the earthquake when the abnormality occurs. However, since such abnormal calls are concentrated within several minutes to several tens of minutes from the occurrence of the earthquake, many calls are concentrated on each modem.

  Moreover, it is unpredictable from which earthquake remote monitoring device these calls are issued (because information is collected because the damage situation and the location of the damage caused by the earthquake are not known in advance) For example, if a simple allocation is made such that 100 earthquake remote monitoring devices that place a call to one modem are allocated in advance, a certain modem will remotely monitor 100 earthquakes. Multiple devices such as 30 corners are prepared because calls from devices are concentrated and other modems do not call from one remote monitoring device during an earthquake. In some cases, the effective use of the modem that was set up may not be achieved.

  In addition to collecting information on earthquake damage, etc., when an earthquake occurs, so-called polling is used as a command message and control signal to transmit remote shut-off control to the remote monitoring device at the time of earthquake. Therefore, the utilization rate of general telephone lines and dedicated communication means is further increased. Such polling is required to be performed quickly and reliably.

  In addition, when an actual earthquake occurs, even if the earthquake disaster prevention system is operated in a so-called “bumping production” and disaster prevention activities are performed, the operator is unfamiliar with the earthquake disaster prevention system and an emergency situation is accompanied with it. There is a risk that it will be difficult to perform accurate and quick disaster prevention activities calmly due to mental pressure (feeling of pressure / heavy pressure) due to the above. For this reason, as a part of disaster prevention activities related to earthquake countermeasures, gas suppliers, etc., assume the occurrence of virtual earthquakes that resemble actual earthquakes, and the damage status of gas piping networks when such earthquakes occur. It is necessary to allow the operator and the like to perform accurate emergency treatment for the situation at the time of the earthquake deposition and calmly by performing training by simulation such as gas leakage situation. However, when an actual earthquake occurs, information on earthquake damage and information on the shut-off state of the shut-off valve device are not collected instantaneously, but gradually collected from each location as described above. If it is not possible to simulate the time lag of information collection, it will not be possible to realize realistic training. However, for example, with the conventional technique proposed in Japanese Patent Laid-Open No. 2002-162893, it is possible to conduct disaster management organization training based on a predetermined scenario. It is not proposed from the technology itself that realizes simulation of damage situation and gas leakage situation of gas piping network including estimation and information on the state of shut-off valve device. It was not even suggested to conduct a simulation including the time lag.

  SUMMARY OF THE INVENTION The present invention has been made in view of such problems, and the object of the present invention is to provide a plurality of modems or receiving devices while first reducing communication costs and equipment costs by using a general telephone line. The object is to provide an earthquake disaster prevention system and an earthquake disaster prevention communication method that can be utilized effectively to realize prompt information communication in the event of an earthquake. A second object is to provide an earthquake disaster prevention system and an earthquake disaster prevention communication method capable of performing a simulation including a time lag of information collection.

  The first earthquake disaster prevention system according to the present invention has a plurality of modems or receivers, and has a function of communicating information with an external earthquake remote monitoring device via a telephone line or communication means. Devices and a piping network that transports a predetermined type of fluid, the number of lines or channels that can be received by the modem or the receiving device is larger than the number of lines that can be received by the modem. And a function for communicating the information when a call is made to the modem or the receiving device via the telephone line or the communication means to ensure a communicable state. A remote monitoring device having an earthquake, and each of the remote monitoring devices at the time of an earthquake makes a call to the modem or one of the receiving devices once to enable communication If the call cannot be secured, the call is tried again for a modem or a receiving apparatus that has not yet been tried and is different from the modem or the receiving apparatus that has not been able to secure a communicable state. Is set to

  The first earthquake disaster prevention communication method according to the present invention includes a plurality of modems or receiving devices, and has a function of communicating information with an external earthquake remote monitoring device via a telephone line or communication means. The seismic information collecting device and the piping network for transporting a predetermined type of fluid are disposed in more places than the number of lines or channels that can be received by the modem or the receiving device. Each of which collects information at the relevant location, and when the modem or the receiving device makes a call via the telephone line or the communication means to ensure a communicable state, the communication of the information An earthquake disaster prevention communication method in an earthquake disaster prevention communication method comprising an earthquake remote monitoring device having a function to perform once on one of the modem or the receiver If the communicable state cannot be secured, the modem or the receiving device that has not tried to make a call is different from the modem or the receiving device that has already tried the call and could not secure the communicable state. And try to make a call.

  That is, in the first earthquake disaster prevention system or the earthquake disaster prevention communication method according to the present invention, redialing is not repeated many times with respect to one modem or receiving device provided in the earthquake information collecting apparatus as in the prior art. In the case where a callable state cannot be ensured by making a call to one of the modems or the receiving device, the modem or the reception that has not been able to secure the communicable state after attempting the call has been continued. An attempt is made to make a call to a modem or a receiving device that has not yet made a call different from the device, until either of the modems or the receiving device can secure a communicable state.

  By doing this, it is possible to quickly ensure a communicable state by omitting the wasted time caused by repeating redialing for one modem or receiving device many times. At the same time, a telephone line or channel in an empty state can be quickly searched to ensure a communicable state, and the uneven use of the telephone communicable state can be eliminated to effectively use the telephone line or channel.

  In the earthquake remote monitoring device, a plurality of modems or receiving devices may be grouped in advance, and the call may be made to one modem for each group. In this way, the number of call attempts can be further reduced.

  In addition, when the grouping as described above is adopted, the earthquake remote monitoring device further performs, for example, the first call trial for all the groups and then the next ( In the second (such as the second) call attempt, a call may be tried to an unattempted modem or receiving device different from the modem or receiving device already tried in the previous call.

  A second earthquake disaster prevention system according to the present invention has a plurality of modems or receivers, and has a function of communicating information with an external earthquake remote monitoring device via a telephone line or communication means. Devices and a piping network that transports a predetermined type of fluid, the number of lines or channels that can be received by the modem or the receiving device is larger than the number of lines that can be received by the modem. And a function for communicating the information when a call is made to the modem or the receiving device via the telephone line or the communication means to ensure a communicable state. A remote monitoring device having an earthquake, and each of the remote monitoring devices at the time of an earthquake makes a call to the modem or one of the receiving devices once to enable communication If it could not be secured, it will continue to redial the modem or receiving device after a different redial waiting time for each remote monitoring device at the time of the earthquake, and (still could not secure a communicable state) In addition, for the second and subsequent redials subsequent to the redial (including the third and subsequent calls as the total number of calls), the same redial is used for all earthquake remote monitoring devices. It is set to be performed after the waiting time has elapsed.

  The second earthquake disaster prevention communication method according to the present invention has a plurality of modems or receiving devices, and has a function of communicating information to an external earthquake remote monitoring device via a telephone line or communication means. In the seismic information collecting device and the piping network for transporting a predetermined type of fluid, the number of lines or the number of channels that can be received by the modem or the receiving device is arranged in more places, and each time an earthquake occurs Collects information at the location, and communicates the information when the modem or the receiving device makes a call via the telephone line or the communication means to ensure a communicable state. An earthquake disaster prevention communication method in an earthquake disaster prevention system having an earthquake remote monitoring device having a function, wherein the method is issued once for one of the modem or the receiver. If the communication status cannot be ensured, redialing is continued for the modem or receiving device after a different redial waiting time for each remote monitoring device at the time of earthquake, and the subsequent The second and subsequent redials are performed after the same redial waiting time has elapsed in all earthquake remote monitoring devices.

  That is, in the second earthquake disaster prevention system or the earthquake disaster prevention communication method according to the present invention, if a callable state cannot be ensured by making a call once to one of the modem or the receiving device, the communication is continued. For the other party's modem or receiving device that could not be secured, redial after the redial waiting time that differs for each remote monitoring device at the time of earthquake, and for the second and subsequent redials after that This is done after the same redial waiting time has elapsed in all earthquake remote monitoring devices.

  In this way, by proactively giving a time difference to the redial timing in each earthquake remote monitoring device, when the redial waiting time (cycle) as in the prior art is constant, a plurality of earthquake remote It is possible to greatly reduce or eliminate the probability that calls from the monitoring device are concentrated on one modem or receiving device at the same timing, thereby quickly ensuring a communicable state.

  A third earthquake disaster prevention system according to the present invention has a plurality of modems or receiving devices, and has a function of communicating information with an external earthquake remote monitoring device via a telephone line or communication means. Devices and a piping network for transporting a predetermined type of fluid, are arranged in more places than the number of all lines or channels that can be received by the modem or the receiving device. A function of collecting information at the location, and a function of communicating the information when a call is made to the modem or the receiving device via the telephone line or the communication means to ensure a communicable state Each of the earthquake remote monitoring devices can make a call once to the modem or one of the receiving devices to communicate with each other. If it can not secure a state, for the second and subsequent redial it is set to perform redialing after a random redial wait time.

  The third earthquake disaster prevention communication method according to the present invention includes a plurality of modems or receiving devices, and has a function of communicating information with an external earthquake remote monitoring device via a telephone line or communication means. In the seismic information collecting device and the piping network for transporting a predetermined type of fluid, the number of lines or the number of channels that can be received by the modem or the receiving device is arranged in more places, and each time an earthquake occurs Collects information at the location, and communicates the information when the modem or the receiving device makes a call via the telephone line or the communication means to ensure a communicable state. An earthquake disaster prevention communication method in an earthquake disaster prevention system having an earthquake remote monitoring device having a function, wherein the method is issued once for one of the modem or the receiver. If it can not ensure a communicable state by, for the second and subsequent redial do redial after a random redial wait time, is that.

  That is, in the third earthquake disaster prevention system or the earthquake disaster prevention communication method according to the present invention, when a callable state cannot be ensured by making a call to one of the modem or the receiving device, the second and subsequent times. Redialing is performed after a random redial waiting time.

  In this way, by actively giving a random time difference to the redial timing of each remote monitoring device at the time of each earthquake, when the redial waiting time (cycle) as in the prior art is constant, multiple earthquakes It is possible to significantly reduce or eliminate the probability that calls from the remote monitoring device concentrate on one modem or receiving device at the same timing, and to quickly ensure a communicable state.

  Note that the above-mentioned random redial waiting time can be set, for example, for each individual earthquake remote monitoring device based on a random number table. Alternatively, different waiting times may be set for each number of redials.

  In addition, each of the earthquake remote monitoring devices, in a plurality of redial attempts, to try redial after a different redial waiting time and to try redialing after the same redial waiting time, It is also possible to perform mixing until a communicable state can be secured for one modem or receiving device.

  In this way, the probability that calls from a plurality of remote monitoring devices at the time of earthquake overlap with one modem or receiving device is further reduced, and a quick communicable state for that one modem or receiving device is ensured. Is possible.

  The earthquake remote monitoring device has a shut-off valve device that shuts off fluid conduction, and the earthquake information collecting device performs remote operation of the shut-off valve device on the earthquake remote monitoring device. It has a polling function for exchanging an instruction to perform or information on the control state of the shut-off valve device, and a predetermined number of all the modems or the receiving devices are assigned exclusively for the polling, It is also desirable to assign the above-mentioned polling with priority to the remaining modems or receiving devices.

  By doing so, it becomes possible to preferentially perform polling communication for a predetermined number of modems or receiving apparatuses.

  In addition, the earthquake information collection device is set so as to secure a free line or a free channel at a ratio to the number of usable telephone lines or the number of channels determined in advance corresponding to the importance of the contents of information to be communicated. You may be made to do.

  In this way, according to the importance of the content of the information to be communicated, a vacant line or a vacant channel is intentionally reserved, so that a high-priority information can be quickly exchanged using the vacant line or vacant channel. It is possible to reliably communicate.

  A fourth earthquake disaster prevention system according to the present invention has a plurality of modems or receivers, and has a function of communicating information with an external earthquake remote monitoring device via a telephone line or communication means. Devices and a piping network that transports a predetermined type of fluid, the number of lines or channels that can be received by the modem or the receiving device is larger than the number of lines that can be received by the modem. And a function for communicating the information when a call is made to the modem or the receiving device via the telephone line or the communication means to ensure a communicable state. A seismic information monitoring device, and the seismic information collection device receives virtual calls with the seismic remote monitoring device to collect virtual information or A function of performing a virtual specific virtual communication as if polling is done, a further.

  The fourth earthquake disaster prevention communication method according to the present invention has a plurality of modems or receivers, and has a function of communicating information with an external earthquake remote monitoring device via a telephone line or communication means. In the seismic information collecting device and the piping network for transporting a predetermined type of fluid, the number of lines or the number of channels that can be received by the modem or the receiving device is arranged in more places, and each time an earthquake occurs Collects information at the location, and communicates the information when the modem or the receiving device makes a call via the telephone line or the communication means to ensure a communicable state. An earthquake disaster prevention communication method in an earthquake disaster prevention system comprising an earthquake remote monitoring device having a function, comprising: the earthquake information collecting device and the earthquake remote monitoring device. In virtually perform virtual communication as if performing collection or virtual polling virtual information receiving call, is that.

  In the fourth earthquake disaster prevention system or earthquake disaster prevention communication method according to the present invention, virtual (so-called virtual) information is collected by receiving a virtual call between the earthquake information collection device and the earthquake remote monitoring device. By performing virtual communication as if virtual polling is being performed, realistic simulations such as gradually collecting information from each location are performed to realize realistic disaster drills, etc. It becomes possible to do.

  The earthquake information collection device generates virtual data of the timing of communication with the remote monitoring device at the time of earthquake and information content to be communicated based on the input earthquake motion data, and It is also possible to perform virtual communication.

  By doing in this way, it becomes possible to realize disaster prevention drills and the like with a higher level of realism through a more realistic simulation.

  The polling may be performed according to a predetermined priority order in descending order of importance of polling contents. In this way, important (high urgency) polling can be performed preferentially and reliably.

  In addition, the earthquake information collection device is dedicated to ensuring a communicable state by receiving a call from the remote monitoring device during an earthquake within a predetermined time from the occurrence of the earthquake, and polling after a predetermined time has elapsed May be made possible.

  In this way, the earthquake information collection device first receives calls when an earthquake occurs and collects information from the remote monitoring devices at each location at the time of the earthquake, and then performs polling based on the information. Therefore, the effective collection of a limited number of modems (general telephone lines) or receivers (dedicated wireless communication means, etc.) enables rapid information collection from the earthquake information collection device and the earthquake information collection device (the shut-off valve device) Etc.) can be realized reliably and quickly.

  Furthermore, it is also desirable that the earthquake information collection device performs polling with priority over outgoing calls after the predetermined time has elapsed.

  In other words, after the above-mentioned predetermined time has elapsed, it is assumed that the collection of information from the remote monitoring device at the time of each earthquake has been completed, and thereafter, one of the most important functions as a disaster prevention system. It is possible to realize more reliable and quick remote operation of the seismic information collection device (such as the shut-off valve device) by exclusively performing polling such as remote operation of the shut-off valve device.

  Here, the information includes at least one of information on earthquake motion, information on fluid pressure, information on fluid flow rate, and information on the state of the shut-off valve device, or some or all of them.

  As described above, first, according to the earthquake disaster prevention system according to any one of claims 1 to 3 or the earthquake disaster prevention communication method according to any one of claims 15 to 17, It is not possible to secure a communicable state by calling once to one of the modems or the receiving device instead of repeating redialing one time for the one modem or receiving device provided in the earthquake information collecting device. If this is the case, it will continue to try to make a call to a modem or receiving device that has not yet been tried and is different from the modem or receiving device that has not been able to secure a communicable state. Because it was repeated until one of the modems or the receiving device was able to secure a communicable state, due to repeated redialing to one modem or receiving device many times This eliminates the wasted time that has been incurred, and can quickly establish a communicable state, as well as quickly search for a free telephone line or channel to ensure a communicable state, thereby avoiding a bias in the communicable state. This eliminates the effect that the telephone line or channel can be used effectively.

  Secondly, according to the earthquake disaster prevention system according to claim 4 or the earthquake disaster prevention communication method according to claim 18, it is possible to ensure a communicable state by calling once to one of the modem or the receiver. If there was no redial, the other modem or receiver that could not secure the communication status was redialed after a different redial waiting time for each remote monitoring device at the time of earthquake, and then continued. The second and subsequent redials are made after the same redial waiting time has elapsed in all the remote monitoring devices at the time of earthquake, so a positive time difference is given to the redialing timing of each remote monitoring device at the time of earthquake. Thus, when the redial waiting time (cycle) is constant as in the prior art, multiple calls from multiple seismic remote monitoring devices are made at the same timing. The probability to focus on the modem or the receiving device is reduced or eliminated significantly, there is an effect that the communication state can be quickly ensured.

  Thirdly, according to the earthquake disaster prevention system according to claim 5 or the earthquake disaster prevention communication method according to claim 19, it is possible to ensure a communicable state by calling once to one of the modem or the receiver. If not, the second and subsequent redials (the third and subsequent calls) will be redialed after the random redial waiting time has elapsed. If a random time difference is positively given and the redial waiting time (period) as in the prior art is constant, outgoing calls from multiple seismic remote monitoring devices are received at one timing or at the same timing The probability of concentrating on the device is greatly reduced or eliminated, and the communicable state can be quickly secured.

  Fourthly, according to the earthquake disaster prevention system according to any one of claims 9 to 14 or the earthquake disaster prevention communication method according to any one of claims 23 to 28, the earthquake information collecting device and the earthquake remote monitoring device Virtual communication (so-called virtual) is performed as if virtual information collection or virtual polling is being performed with a virtual call, and no actual communication is performed. In both cases, it is possible to realize realistic disaster prevention drills by performing realistic simulations in which information from each location is gradually collected.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[First Embodiment]

  FIG. 1 shows a schematic configuration of the earthquake disaster prevention system according to the first embodiment of the present invention. In addition, since the earthquake disaster prevention communication method according to the present embodiment is embodied by the operation or action of this earthquake disaster prevention system, they will be described together below.

  The earthquake disaster prevention system includes a terminal device 10, a server 20, an earthquake remote monitoring device 30, a storage device 40, an analysis device 50, and a plurality of modems 60 attached to the server 20. Is configured, and when an actual earthquake occurs, the function to collect information at the time of an earthquake and the disaster prevention function at the time of an earthquake, and the virtual information generation function at training and the function to be executed at the time of training are provided. The server 20 which is the main information processing apparatus combines the time virtual disaster prevention function with a single piece of hardware. The function at the time of the earthquake occurrence and the function at the time of training can be switched and used, or both can be run in parallel at the same time.

  The seismic remote monitoring device 30 is attached to a governor 31 arranged at each of a large number of major bases such as 3700 locations in a city gas supply area where a city gas pipe network is laid. Collects various information at the time of an earthquake and controls remote disconnection of the governor 31 at each site. When an earthquake occurs, a call is made to the modem 60 of the server 20 to ensure a communication state and collect various information. Is transmitted to the server 20 via the general telephone line 39 and the modem 60. Thereafter, as a so-called polling function, for example, a command message or a control signal for performing remote shut-off control is received from the server 20, and information on a place where damage is estimated is focused. .

  The server 20 is provided with a plurality of modems 60, for example, 30 units. Each of the modems 60 is transmitted from the remote monitoring device 30 at the time of earthquake through the general telephone line 39 when an earthquake occurs. The call is received in the order of the earliest person to ensure a communicable state, and information sent from the remote monitoring device 30 at the time of the earthquake during the call is received (collected). In addition, as a polling function, a command message or a control signal for performing remote shut-off control is transmitted to the seismic remote monitoring device 30 during a call via the modem 60 and the general telephone line 39, for example, abnormal pressure drop For example, information is gathered on a point where earthquake damage is presumed as earthquake damage is estimated.

  Communication between the remote monitoring device 30 at the time of earthquake and the modem of the server 20 is performed by the method described below.

  FIG. 2 schematically shows a communication method performed between the earthquake remote monitoring device 30 and the modem of the server 20. In FIG. 2, the server 20 includes three modems 60 (first modem 601 and second modem 602) in order to simplify understanding of the main points of the communication method in the earthquake disaster prevention system according to the present embodiment. , A third modem 603), and six (six locations) earthquake remote monitoring devices 30 (first earthquake remote monitoring device 301, second earthquake remote monitoring device 302) are provided in the piping network. , The third seismic remote monitoring device 303, the fourth seismic remote monitoring device 304, the fifth seismic remote monitoring device 305, and the sixth seismic remote monitoring device 306). Then, it is shown schematically. However, in reality, there are a very large number of remote monitoring devices 30 at the time of earthquake, such as 3700 units or more in total, and a large number of modems 60 such as 30 to 50 units are prepared, Needless to say, the overall configuration is much more complicated and larger than that shown schematically in FIG.

  One of the plurality of earthquake remote monitoring devices 30 will be described by paying attention to, for example, the first earthquake remote monitoring device 301. The first earthquake remote monitoring device 301 includes, for example, one modem 601. If the communication is not possible after securing a call, the modem 601 does not continue to try so-called redialing for that one modem 601 but cannot ensure the communication possible state. An attempt is made to make a call to a modem 602 that has not made a call different from 601. If a communicable state cannot be ensured for the modem 602, a call is attempted to a modem 603 that has not yet been called and is different from the modem 602. Such a call is repeated until a communicable state can be secured by any modem 60. By doing this, it is possible to quickly ensure a communicable state by omitting the wasted time caused by repeating redialing for one modem or receiving device many times. At the same time, the modem 60 and the ordinary telephone can be quickly communicated with the idle modem 60 and the ordinary telephone line 39 due to the deviation of the outgoing call (and the resulting deviation of the line in use). Effective use of the line 39 becomes possible. Each of the plurality of earthquake remote monitoring devices 30 makes such a call.

  Note that the trial order of a call from one seismic remote monitoring device 30 to a plurality of modems 60 is not limited to the order of arrangement in the order of modem 601 → modem 602 → modem 603 as described above, for example. . In addition to this, for example, it is possible to set in the order of modem 603 → modem 601 → modem 602.

  Moreover, you may make it try call-out in a different order for every remote monitoring apparatus 30 at the time of an earthquake. For example, the first seismic remote monitoring device 301 attempts to make a call in the order of modem 601 → modem 602 → modem 603, and the fourth seismic remote monitoring device 304 uses modem 602 → modem 603 → It is also possible to try calling in the order of the modem 601. By doing so, for example, even when a plurality of remote monitoring devices 30 at the time of an earthquake try to make a call almost simultaneously, the calls are duplicated to one modem 60 (so-called “calls are shared”). It is possible to prevent a situation in which both of them are in a “busy” state and cannot establish a communicable state.

  Further, even if one seismic remote monitoring device 30 tries to call all the modems 60 once (assuming this is called the first cycle call), all the modems 60 If the communicable state cannot be ensured, the call of the second cycle is tried. The order of the call attempts of the second cycle is the trial of the call of the first cycle. It is also effective to make it different from the order.

  For example, as schematically shown in FIGS. 3 (A) and 3 (B), one seismic remote monitoring device 301 can be used for the first cycle (FIG. 3 (A)) modem 601 → modem 603 → Attempts to make a call in the order of modem 602, and in the call of the second cycle (FIG. 3B), in an order different from the order of the first cycle, for example, modem 602 → modem 601 → modem 603 Alternatively, a call may be attempted.

  Alternatively, a plurality of modems 60 may be grouped in advance, and each earthquake remote monitoring device 30 may make a call to one modem 60 for each group. For example, as schematically illustrated in FIG. 4, when communication is performed between eight modems 60 (601 to 608) and 20 remote monitoring devices 30 (301 to 320) during an earthquake, The modems 601, 602, and 603 are grouped as a first group 610, the modems 604 and 605 are grouped as a second group 620, and the modems 606, 607, and 608 are grouped as a third group 630. Then, for example, one earthquake remote monitoring device 301 first attempts to make a call to one modem 601 in the first group 610, and if the communication state cannot be ensured by the call, the remote monitoring device 301 continues. If a call is attempted to one modem 604 in the second group 620 and the communication state is still not secured, the modem 607 continues to the one modem 607 in the third group 630. Try to make a call. Also, in this case, for example, the earthquake remote monitoring device 320 other than the earthquake remote monitoring device 301 tries to make a call in an order different from the order of calls made by the earthquake remote monitoring device 301 as described above. It may be. For example, the seismic remote monitoring device 320 first attempts to make a call to one modem 606 in the third group 630, and if the communication state cannot be secured by the call, the remote monitoring device 320 continues. If a call attempt is made to one modem 605 in the second group 620 and the communication state is still not secured, the call is subsequently made to one modem 603 in the first group 610. It is also possible to try a call.

  In addition, when the communication state cannot be ensured even after the first cycle call attempt is completed for all the groups in this way, the second cycle call attempt is performed. In the call attempt of the second cycle, the call may be tried to the modem 60 that has not yet tried to call, which is different from the modem 60 of the partner who tried to call the first cycle. For example, one seismic remote monitoring device 301 tried to make a call in the order of modem 601, modem 604, modem 607 as shown in FIG. As shown in an example schematically in FIG. 5, first, a call is attempted to one modem 602 in the first group 610, and a communication state can be secured by the call. If there is no communication, a call is attempted to one modem 605 in the second group 620, and if the communication state cannot be ensured, the call is continued in the third group 630. Try to make a call to one modem 608.

As described above, according to the earthquake disaster prevention system according to the first embodiment, it is possible to quickly ensure a communicable state by omitting useless redial time for the modem 60 of the earthquake remote monitoring device 30. In addition, by making a call to the modem 60 and the general telephone line 39 that are in an idle state and securing a communicable state quickly, the unevenness of the communicable state is eliminated, and the limited number of modems 60 and the limited number of modems 60 It is possible to effectively collect information in the event of an earthquake or the like by effectively using the general telephone lines 39 having the number of lines.
[Second Embodiment]

  In the earthquake disaster prevention system according to the second embodiment, when one earthquake remote monitoring device 30 cannot secure a communication state even if a call is made to one modem 60, Redialing is performed for one modem 60.

  The redialing method is not to simply redial every predetermined period (redial waiting time), but to one modem 60 as schematically shown in the form of a timing chart in FIG. If the communication cannot be ensured after attempting to make a call once, the modem 60 continues to have different times (T1, T2, T3... After the redial waiting time set in) has elapsed, the first redial (second call) is made, and the second and subsequent redials (including the third and subsequent call attempts) are all This is performed after the redial waiting time set at the same time (T0) in the remote monitoring device 30 at the time of earthquake.

  In this way, by changing the redial waiting time for each remote monitoring device 30 at the time of an earthquake, a time difference is positively given to the timing of redialing at each remote monitoring device 30 at the time of an earthquake. When the redial waiting time (period) is constant, calls from a plurality of remote monitoring devices 30 at the time of an earthquake are not concentrated on one modem 60 at the same timing, and the communication ready state is quickly Can be secured. Here, even if it is intended to positively give a time difference to the redial timing for each of the different seismic remote monitoring devices 30 as described above, there may be a case where the redial timing coincides by chance. The probability of such coincidence occurring is very low.

  Note that the method for positively giving a time difference to the redial timing is not limited to the above. In addition to this, each earthquake remote monitoring device 30 may employ a random redial waiting time for each outgoing call. By doing so, it is possible to eliminate the concentration of outgoing calls to one modem 60 at the same timing. In addition, the probability of accidental coincidence such that the redial timing coincides accidentally becomes extremely low.

  The random redial waiting time as described above can be set based on a random number table, for example, for each individual remote monitoring device 30 during an earthquake. Alternatively, for example, as shown in FIG. 7A, for example, different waiting times may be set for each number of redials (for each call).

  Further, as shown in FIG. 7B, each of the earthquake remote monitoring devices 30 is performing a plurality of redial attempts and after different redial waiting times (for example, T1, T2, T3) have elapsed. Trying redialing and trying redialing after a common redial waiting time (for example, T0) elapses until a communicable state can be secured for one modem or receiving device. It is also possible to make it. If different redial waiting times (for example, T1) and common redial waiting time (T0) are regularly mixed alternately, for example, T1-> T0-> T1-> T0-> T1-> T0. Specifically, since T1 + T0 results in one fixed redial period ({T1 → T0} → {T1 → T0} → {T1 → T0}...), Avoid such a regular order of mixing. For example, they are intentionally mixed in an irregular order such as T 1 → T 0 → T 0 → T 0 → T 1 → T 1 → T 0 → T 1. By doing so, it is possible to further reduce the probability that redialing from a plurality of earthquake remote monitoring devices 30 overlaps with one modem 60 and to quickly ensure a communicable state for that one modem 60. .

As described above, according to the earthquake disaster prevention system according to the second embodiment, useless redialing of the modem 60 of the remote monitoring device 30 at the time of the earthquake and redialing of one modem 60 are repeated. Can be quickly secured, and a limited number of modems 60 (and a general telephone line 39 with a limited number of lines) can be used effectively, and in the event of an earthquake, etc. Information collection can be realized.
[Third Embodiment]

  In the third embodiment, information is quickly collected using a limited number of modems 60 (and a general telephone line 39 having a limited number of lines) by skillfully setting the timing of calling and polling. The earthquake disaster prevention system that can perform is explained. In the third embodiment, in order to simplify the illustration and description, the same reference numerals as those in the first embodiment are assigned to the same parts and functions as those in the first embodiment. And the same designation.

  In the earthquake disaster prevention system according to the third embodiment, a predetermined number (number of lines) of all the modems 60 (and general telephone lines 39) is assigned as dedicated for polling, and the remaining modems 60 ( The general telephone line 39) is set in advance so that polling is given priority but is allocated as a dual-purpose stand (shared line) for polling and responding to an outgoing call (alarm call) at the early stage of an earthquake.

  More specifically, as shown in FIG. 8 (A), before the earthquake occurs, out of the 60 lines that are the total number of lines, 10 lines are allocated exclusively for polling and the remaining 50 lines are polled. / Set in advance so that it is assigned for both alarm call reception and reception. The allocation of this allocation will not change after the earthquake.

  When an earthquake occurs, an alarm call is started correspondingly, and the call is received by 50 lines allocated for both polling / alarm call reception. When the polling is performed after a further elapse of time, it is first used for polling with priority from the 10 lines allocated exclusively for polling. When all the 10 lines dedicated to polling are in use, an empty line out of 50 lines allocated for both polling / alarm calling reception is used for polling. However, at this time, out of the 50 lines that are used for both polling / alarm call reception, the total number of lines that can be used excluding the line that was disconnected due to a failure or disconnection of the telephone network due to earthquake damage, etc. On the other hand, it is set so that an empty line is intentionally reserved at a predetermined ratio corresponding to the importance of communication contents such as polling or information collection.

  For example, if 5 lines are disconnected due to disconnection or the like, the number of lines that can be used will be 45 lines, but 20% of free lines should be secured when polling for remote disconnection. As shown in FIG. 8 (B), 9 lines are intentionally reserved as free lines, so the number of lines that can be used for remote disconnection is 36 lines. It will be. At this time, the 9 lines reserved as free lines are left so that they can be used for collecting, for example, seismic motion data other than remote blocking polling. In addition, when seismic motion data is collected, assuming that it is predetermined to secure 40% of free lines, as shown in FIG. 8 (C), 18 lines are reserved as free lines at this time. Therefore, the number of lines that can be used for collecting earthquake motion data is 27 lines. Then, the 18 lines secured as free lines at this time are left so that they can be used for, for example, remote shutoff polling other than seismic motion data collection.

  In the earthquake disaster prevention system according to the third embodiment, the number of telephone lines that can be used at that time corresponds to the polling and the call, or the importance of the content of information to be communicated. It is set so as to secure a free line at a predetermined ratio with respect to.

  More specifically, for example, in the case where 60 general telephone lines 39 that can communicate with the remote monitoring device 30 at the time of earthquake are prepared in total (and 60 modems 60 in total), gas pipes are provided at the early stage of the earthquake. A number of alarm calls are made from the remote monitoring device 30 at the time of the earthquake in each part of the network (each place where the governor 31 is disposed) to the modem 60. At this stage, the server 20 still does not make calls. Because it has not been received, information on the open / close state of the shut-off valve devices in each region at the initial stage of the earthquake has not been collected sufficiently, and therefore damage estimation etc. has not been done, so damage occurrence is estimated It is not in a state where it is possible to perform boring such as focused information collection at a location or remote cutoff control.

  Therefore, for example, as shown in FIG. 9, the server 20 is connected to the earthquake remote monitoring device 30 during a so-called initial earthquake occurrence time, such as 10 minutes after the first occurrence of the earthquake. It is dedicated to responding to alarm calls placed to the modem 60.

  When the first 10 minutes of the earthquake has elapsed, information collection corresponding to more than half of the calls is completed, and the remaining number of calls in the early earthquake is gradually reduced. The mode shifts to a mode in which both information collection corresponding to a call and polling are performed in parallel. In FIG. 9, the mode in which both information collection and polling corresponding to the alarm call are performed in parallel is continued for 30 minutes from the time when 10 minutes have passed since the occurrence of the earthquake to the time when 40 minutes have passed. ing.

  Subsequently, after the response to the call is almost completed, the mode basically shifts to a mode in which only polling is performed. In FIG. 9, this polling-only mode is continued for 140 minutes from the time when 40 minutes have passed since the occurrence of the earthquake to the time when 150 minutes (2.5 hours) have passed.

  Within the time period during which polling is continued, remote interception control is prioritized, followed by information collection of pressure changes in the hazardous area, followed by seismic motion data collection. Basically, various types of communication are performed in accordance with priorities determined in advance corresponding to the importance of information content to be communicated. Here, “basically” means that a call can be placed even in a time zone in which, for example, information on pressure change in a dangerous area is preferentially collected. Is also set to allow.

  For example, in the example shown in FIG. 9, the first 25 minutes (from the time when 10 minutes have passed since the occurrence of the earthquake to the time when 35 minutes have passed) are remotely performed from the server 20 to the remote monitoring devices 30 at the time of earthquake. Cut-off control is basically prioritized. For the subsequent 15 minutes (from the time when 35 minutes have passed since the earthquake occurred until the time when 50 minutes have passed), information collection of pressure change in the hazardous area is basically prioritized. For the next 100 minutes (from the time when 50 minutes have passed after the occurrence of the earthquake to the time when 150 minutes have passed), the seismic motion data collection is basically prioritized.

In this way, according to the earthquake disaster prevention system according to the third embodiment, a limited number of modems 60 (and a limited number of general telephone lines 39) can be effectively used to generate an earthquake. In such a case, quick information collection and polling can be performed with priority according to the importance.
[Fourth Embodiment]

  In the earthquake disaster prevention system according to the fourth embodiment, is the server 20 collecting virtual information or performing virtual polling by receiving a virtual call with the earthquake remote monitoring device 30? A function for performing virtual communication such as is further provided. In the fourth embodiment, in order to simplify the illustration and description, the same reference numerals as those in the first embodiment are assigned to the same parts and functions as those in the first embodiment. And the same designation.

  In this earthquake disaster prevention system, as shown in FIG. 10, the seismic motion value data and the virtual time data (SI ( t)), pressure value (P) data and its virtual measurement time data (P (t)), flow rate value (Q) data and its virtual measurement time data (Q (t)), The shut-off state (open / closed state) data of the shut-off valve device and the virtual data (G (t)) of the detection time are collectively stored for each remote monitoring device 30 at the time of earthquake.

  The virtual communication unit 200 includes a virtual call communication unit 201 that performs a virtual call operation and a virtual polling communication unit 202 that performs a virtual polling operation. By performing reading and writing of data between them, communication as described in the first embodiment, the second embodiment, and the third embodiment is virtually performed.

  The virtual call communication unit 201 is connected to a number of remote monitoring devices 30 at the time of an earthquake by the method described in the first embodiment, the second embodiment, and the third embodiment. A state in which a call is quickly received in the order of the first person and a communicable state is secured is virtually generated.

  More specifically, the virtual call communication unit 201 reads out the interruption state data G (t) stored in the main storage device 21 and sends it to the training virtual information generation unit 203. The training virtual information generation unit 203 makes a call in the order of the person with the earliest time t by the communication method as described in the first embodiment, the second embodiment, and the third embodiment. The data G (t) is reorganized as if received, and the data is sent to the terminal device 10. In the terminal device 10, based on the data sent from the training virtual information generation unit 203, it is possible to quickly receive calls from a large number of earthquake remote monitoring devices 30 in order from the earliest to establish a communicable state. The information on the virtual shutdown state of the earthquake remote monitoring device 30 is displayed or printed out as if the information on the cutoff state was collected from each location.

  The virtual polling communication unit 202 is a virtual polling in a virtual earthquake disaster prevention system constructed by the training virtual information generation unit 203 based on a command message transmitted from the terminal device 10 by a user's remote operation input. Polling (for example, remote shut-off control) is performed, and virtual data G (t) is generated by associating the remote operation input data at that time with the data at the time t when the data was input. And the data of the virtual interruption | blocking state regarding the remote monitoring apparatus 30 at the time of the earthquake of the polling object are rewritten. Also, the storage of the data of the virtual earthquake remote monitoring device 30 rewritten at that time is updated. Then, the terminal device 10 displays or prints out the partially rewritten information corresponding to the rewritten blocking state data.

  By doing so, it is possible to perform a realistic simulation that information from each location is gradually collected, and to realize a realistic disaster prevention drill, etc. .

  Alternatively, as a simpler technique, the virtual information generation unit 203 performs virtual calling and polling in the virtual earthquake disaster prevention system constructed by the virtual information generation unit 203 during training. All of a series of time-series data is fixedly stored in the main storage device 21 in advance, and the scenario-like data is read out from the main storage device 21 and used at the time of simulation execution. It is also possible to perform a simulation in which information is gradually collected. However, in the case of making all calls and polling and collecting information based on data created in a fixed (scenario) manner in advance, only one fixed type of simulation is performed. There is a restriction that it can only be executed. For this reason, in order to be able to realize a simulation with different contents (one can be selected from a plurality of variations in terms of contents), a lot of types of scenario-like data must be prepared in advance. However, on the other hand, there is an advantage that an overall earthquake disaster prevention simulation including calling and polling can be realized by a simple method.

  Here, each component of the main part of the earthquake disaster prevention system according to the first to fourth embodiments will be described in more detail.

  As shown in FIG. 11, the earthquake remote monitoring device 30 includes an SI sensor 32, a seismic sensor 33, a pressure sensor 34, a flow sensor 35, a remote shut-off unit 36, an information processing unit 37, and a communication. And a unit 38.

  The governor 31 functions as a pressure adjustment valve that adjusts the pressure of the gas supplied from the medium-pressure conduit, which is the main pipe, to the low-pressure pipe, which is the terminal pipe, and performs remote shutoff or automatic seismic shutoff when an earthquake occurs. And a function as a so-called shut-off valve device.

  The SI sensor 32 outputs information on SI values observed when an earthquake occurs at a point where the earthquake remote monitoring device 30 is installed.

  The seismoscope 33 measures the seismic acceleration (Gal) observed at the time of the earthquake at the point where the seismic remote monitoring device 30 is installed, and outputs the information of the seismic acceleration measurement value.

  The pressure sensor 34 measures the pressure of the gas in the intermediate pressure conduit to which the pressure sensor 34 is attached, and outputs information on the measured value of the pressure. The flow rate sensor 35 measures the flow rate of the gas in the intermediate pressure conduit to which the flow rate sensor 35 is attached, and outputs information on the measured flow rate value.

  The remote shut-off unit 36 is controlled by an information processing unit 37 (described later) when an earthquake occurs, and performs control to automatically shut off the governor 31. Alternatively, when the server 20 receives a command from the input device 400 of the terminal device 10 by the user and sends a control signal, the server 20 is remotely controlled by the control signal to perform control to shut off the governor 31. Further, for example, when the danger such as a disaster caused by an earthquake is resolved, the governor 31 that has been in the shut-off state until then is remotely operated by the server 20 in response to an instruction from the terminal device 10. Control (return to the open state) is performed.

  The remote cutoff unit 36 issues a remote cutoff command only when the SI value measured by the SI sensor 32 is 10 [kine] and the vibration acceleration measured by the seismic sensor 33 is 50 [Gal] or more. By accepting it, it is equipped with a gate function that performs reliable shut-off in the event of an earthquake and prevents false shut-off at normal times and illegal system entry by hackers. In other words, when the seismic acceleration measured by the seismic sensor 33 is less than 50 [Gal], this gate function does not perform remote shut-off even when a remote shut-off command is received. The gate function may be provided in the server 20 or the terminal device 10 in addition to the earthquake remote monitoring device 30.

  Further, the remote shut-off unit 36 receives a control signal for performing control to shut off the governor 31 by remote operation from the server 20 via the communication means 39 or the like.

  The information processing unit 37 includes information on SI values measured by the SI sensor 32 and information on measured values of vibration acceleration, information on measured values of gas pressure measured by the pressure sensor 34, and gas flow rate measured by the flow sensor 35. The measured value information is converted into data so that it can be processed by the server 20 via a general telephone line and a modem, respectively, and information on the time at which each is measured is added to each type of information data. Then, the data is sent to the external server 20 via the communication unit 38 and 39 such as a general telephone line.

  Further, the information processing unit 37 is based on the SI value output from the SI sensor 32 or the information on the vibration acceleration, for example, when the SI value exceeds a predetermined threshold (in other words, the ground motion) In the case of a strong vibration exceeding a predetermined magnitude), it is detected and a control signal for performing control to automatically shut off the governor 31 is transmitted to the remote shut-off unit 36. In response to the control signal, the remote shut-off unit 36 performs control to shut off the governor 31 as described above. Alternatively, communication such as the modem 60 and the communication unit 38 and the general telephone line 39 or other dedicated wireless communication network or dedicated optical fiber cable communication line from the server 20 in response to a remote operation command input from the external terminal device 10. When a control signal for performing remote shut-off is transmitted via the means or the like, the control signal is input to the remote shut-off unit 36 to cause the remote shut-off unit 36 to execute remote shut-off control according to the command.

  The information processing unit 37 also has a function of transmitting information about whether the governor 31 is in a cut-off state or an open state to the server 20 via the communication unit 38, the general telephone line 39, and the modem 60. Yes.

  The server 20 is a main information processing apparatus in this system, and is installed at a position away from the earthquake remote monitoring apparatus 30 and is a function executed when an actual earthquake occurs. One hardware includes an earthquake occurrence function unit 210 that performs a disaster prevention function when an earthquake occurs, and a training function unit 220 that performs a virtual information generation function during training and a virtual disaster prevention function during training. Have both. The earthquake occurrence function unit 210 that performs the function at the time of the occurrence of the earthquake and the training function unit 220 that performs the function at the time of training can be switched to operate, or both can be run in parallel at the same time. Is also possible.

  The information collection function at the time of earthquake occurrence is based on the information sent from the remote monitoring device 30 at the time of an earthquake and the distribution of the geographical distribution in the piping network related to the shutoff state of the governor 31 which is the shutoff valve device. This is a function for collecting and processing information to display and print output and store it.

  More specifically, in this function, the server 20 causes the SI value and the acceleration information, which are information of the seismic motion measured and transmitted by the remote monitoring device 30 at the time of the earthquake, the pressure of the gas in the piping network, Data relating to the flow rate and information about the open / closed state of the governor 31 are collected from the remote monitoring device 30 at the time of earthquake for each base via the communication means 39. That is, the server 20 has a function as an earthquake information collecting means (or an earthquake information collecting device), and a main memory for storing data at the time of occurrence of the earthquake actually collected at the time of the occurrence of the earthquake as described above. The device 21 is built in.

  For example, a seismic motion with a seismic intensity of 3 or more is detected by one of the seismic remote monitoring devices 30 installed in the gas supply area (all areas) where the piping network is laid. When the data is transmitted from the remote monitoring device 30 to the server 20, the entire earthquake disaster prevention system shifts to the earthquake mode and collects information as described above. Further, in the server 20, when one earthquake occurs, the information on the ground motion detected over a predetermined time such as 6 hours from the time of the occurrence of the earthquake is regarded as a series of ground motion information on one earthquake. Thus, a series of SI values and vibration acceleration information (earthquake information) relating to the one earthquake is associated with information on the gas pressure state and flow rate state and the cutoff state of the governor 31 when the earthquake occurs. Are collectively stored in the main storage device 21 as information on one earthquake.

  The earthquake disaster prevention function remotely controls the governor 31 by sending a control signal to the earthquake remote monitoring device 30 based on a command message transmitted from the terminal device 10 when an actual earthquake occurs. This is a function as a shutoff valve remote control device that performs remote shutoff control.

  More specifically, in the disaster prevention function at the time of the occurrence of an earthquake, the terminal device 10 is provided with a command message for causing the governor 31 to perform an operation of controlling the governor 31 in a shut-off state, and a governor 31 to be controlled. A message that is combined with a message of identification information of a block is generated so as to have a one-to-one correspondence with each of all the governors 31 in one block, and messages for all the governors 31 in the one block are generated. Are collected together (as a series of one log data in which the front end and the rear end are separated by a delimiter character or the like) and sent to the earthquake remote monitoring device 30. And when the server 20 which functions as a shut-off valve remote control device receives a batch of electronic messages from the terminal device 10, it performs an operation to control all the governors 31 included in the electronic message to the cutoff state all at once. .

  FIG. 12 schematically shows an example of the piping configuration in one unit block when the entire piping network is divided into unit blocks. Further, the geographical (geographic) image as shown in FIG. 12 is displayed on the display device 300 of the terminal device 10 as information on the geographical distribution of the cutoff state of the governor 31 when an actual earthquake occurs. . Here, in FIG. 12, what is drawn as a thick pipe shows the intermediate pressure conduit 41, and what is drawn as a narrower pipe shows the low pressure conduit. In FIG. 12, the portion marked with “X” indicates a breakage occurrence location 44 estimated by the server 20 corresponding to the input information of the seismic motion. In addition, in FIG. 12, since the dwelling 46 of a consumer in the block 45, piping structure, etc. are drawn typically, it is considerably simplified rather than actual, but the density and arrangement | positioning of actual piping structure, a residence, etc. It goes without saying that the complexity of is higher than that shown in FIG.

  In the piping in one unit block, generally, the block valve 47 which is provided at each boundary with the adjacent other block and is normally closed isolates the gas conduction with the adjacent other block. Has been. In addition, a function of automatically shutting off the valve device in response to an earthquake motion of a predetermined magnitude or more and a function of shutting off the valve device by remote operation for each connecting portion between the intermediate pressure conduit 41 and the low pressure conduit 42 Governor 31a, 31b, 31c, 31d having the function of adjusting the pressure of the gas supplied (transported) from the intermediate pressure conduit 41 to the low pressure conduit 42 is provided.

  In general, when an earthquake actually occurs, theoretically, all governors 31a, 31b, 31c, and 31d in one block as shown in FIG. Therefore, even when a pipe breakage occurs in one block as shown in FIG. 12 and a gas leak occurs from that portion, no measures have been taken against the gas leak. The gas leakage continues until the pressure of the gas reaches an external so-called atmospheric pressure (gauge pressure), but when the pressure reaches an equilibrium state, the gas leakage stops.

  However, in actuality, as schematically shown in FIG. 13B, for example, only the ground at the point where the governor 31d in the upper right position in FIG. When there is little shaking due to the earthquake, the pipe 44 is broken at the breakage location 44 in the pipe network due to the earthquake at that time, and most of the governors 31a, 31b, 31c in the block are cut off. On the other hand, there may be a situation in which the governor 31d is in an unblocked state.

  In such a case, a pressure drop in the low pressure conduit 42 occurs due to gas leakage from the breakage occurrence point 44, and the governor 31d responds to this pressure drop by its original function. It functions to increase the gas supply (conduction) flow rate from the intermediate pressure conduit 41 to the low pressure conduit 42 in order to return the pressure in the state 42 to a normal state. For this reason, as shown in FIG. 13 (B), the gas leakage flow rate from the breakage occurrence point 44 in the piping network is promoted by the function of increasing the supply amount by the governor 31d in an unblocked state, and the gas flow is forever. Leakage will continue.

  In such a case, the governor 31d in an unblocked state is requested to be forcedly blocked by a remote operation from the outside. Therefore, for example, the operator securely shuts off all the governors 31 in the uncut state in all the piping networks manually while visually checking the display output image of the terminal device 10. Alternatively, as shown in FIG. 13 (A), a pipe breakage occurred in one block as shown in FIG. 12 and gas leakage occurred from that portion, but no measures were taken against the gas leakage. In this way, all the governors 31 in the block are controlled to be shut off at the same time, and the gas supply from the outside of the block (intermediate pressure conduit 41) is surely stopped, and the gas is supplied to the one block. The gas leakage in the one block may be surely stopped by setting the isolated state.

  The server 20 further automatically determines that an earthquake has occurred when an earthquake of a predetermined magnitude or more, such as 50 [kine], is detected, and responds to the command message. The state in which all the governors 31 in one block can be controlled to be shut off is continued for a predetermined time such as 6 hours, but an occurrence of an earthquake of less than a predetermined scale is detected. If no earthquake is detected, the control for shutting off all the governors 31 in one block as described above may not be performed regardless of the presence or absence of a command message. By doing so, it is possible to prevent so-called erroneous shut-off and intrusion of hackers at normal times other than when an earthquake occurs, and to control all the governors 31 in one block at the same time when an earthquake occurs. Can be performed reliably.

  The virtual information generation function during training virtually generates geographical distribution information in the piping network related to the virtual automatic seismic cutoff state of the governor 31 based on virtual earthquake motion data input during training. The geographical image is displayed and printed out and stored.

  In addition, in this virtual information generation function at the time of training, in addition to the virtual shut-off control of the governor 31, a pipe network damage estimation function for estimating the material mechanical damage state of the pipe network, etc. It also has a pipe network fluid state analysis function that simulates the gas pressure and flow rate in the pipe network for the seismic motion data. The pipe network fluid state analysis is principally analyzed by the analysis device 50 based on the pipe network damage estimation data estimated by the server 20.

  The virtual disaster prevention function during training is generated by the virtual information generation function during training for the governor 31 in which the cutoff operation is virtually remotely controlled with respect to the governor 31 during training and the virtual cutoff is performed by the operation. Reflect the information on the geographical distribution in the pipe network (adding or modifying the information to rewrite the information on the virtual state of the governor 31 in the simulation at the time of training to the cut-off state, or vice versa. In addition, the function that rewrites the state that was in the shut-off state to the open state corresponding to the virtual remote operation).

  Data that is generated by the training virtual information generation function and the training virtual disaster prevention function, which are simulation functions at the time of training, or a part of which is rewritten by adding virtual remote operation information to it, etc. And stored in the storage device 40 as analysis result storage means.

  More specifically, at the time of training, when the information about the magnitude of the earthquake motion (SI or value such as Gal) is input from the terminal device 10, the server 20 causes damage to the piping network due to the magnitude of the earthquake motion. It is equipped with a function as a pipe network damage estimation means for performing the estimation. The estimation result of the damage occurrence location by the server 20 is displayed and output by the display device 300. The information on the seismic motion input at this time may be virtual, or may be data on the magnitude of seismic motion observed when an earthquake actually occurs. When simulation during training is performed, information on virtual ground motion is input. Or, when an earthquake actually occurs, for example, if it is not possible to collect information such as seismic motion data or damage status data in some areas, the observation is approximately in the vicinity of the area. It is also possible to input the seismic motion data and perform the same estimation as the simulation at the time of training.

  This server 20 responds to the remote operation when the virtual remote operation for the governor 31 arranged at each important point in the piping network is performed by the function as the virtual remote operation input means of the terminal device 10. A virtual valve opening / closing operation (valve shut-off or opening) of the governor 31 is virtually performed in a gas piping network built in software in the governor 31 to perform analysis by the analysis device 50. As one of the analysis conditions, the virtual valve opening / closing state of the governor 31 is included.

  For example, when a user performs a virtual remote operation for executing a closing operation of a valve device with respect to a certain governor 31 in the piping network during training, the valve device of the governor 31 is actually closed. The server 20 is assumed to be virtual. Then, the analysis device 50 receives information from the server 20 (such as data on the position of occurrence of breakage in the piping network and the data of the gas cutoff state by the governor 31), and analyzes that the valve device of the governor 31 has been closed. In addition, analysis (simulation) on the pressure state and leakage state of the gas in the piping network in that case is performed.

  The server 20 has a function of estimating an earthquake damage occurrence location of the gas piping network corresponding to the input information of the seismic motion, a function of performing an analysis of gas pressure and flow rate, and a function of performing a virtual interruption simulation. Will be described in more detail.

  As shown in FIG. 14, the server 20 includes a critical value storage unit 100 and a damage occurrence estimation unit 200, and is connected to the external analysis device 50 and the terminal device 10 (the display device 300 and the input device 400 thereof). It is connected. Although not shown in FIG. 14, it goes without saying that a modem 60 and a general telephone line 39 are inserted between the server 20 and the earthquake remote monitoring device 30 so that information can be communicated. .

  The critical value storage unit 100 divides a city gas piping network stretched in a predetermined area such as almost the entire Kanto area into a mesh of a predetermined size, for example, into a plurality of segments (this segment). Is different from the above “block”), and each segment is given an identification number (N = 1, 2, 3,...), And the natural vibration period (T) of the ground or Based on the natural vibration wavelength (L) and the critical deformation amount (Dcr) at which piping breakage occurs, the critical ground motion value (SIcr), which is the critical ground motion value at which the pipe in the segment breaks, is calculated in advance. Data, flow critical deformation (δcr) data that predicts that the pipe will be damaged in the direction of flow caused by the fluidization of the ground in the event of an earthquake, and the segment on a map in a given area Data about what is present in any position; and ((x, y) for example, the data of the orthogonal coordinates), and association with each other. The critical value storage unit 100 also stores data for displaying a map of the area where the piping network is arranged and the piping network on the screen of the display device 302 of the display device 300.

  For example, for the nth segment (N = n), the position data in the map of the nth segment is (x, y), the natural vibration period of the ground is T, the natural vibration wavelength is L, and the critical deformation amount is Dcr. When the critical flow deformation amount is δcr, the critical value storage unit 100 stores {N = n, (x, y), T, L, Dcr, δcr, SIcr} as a maximum of 7 as the nth segment data. Various types of data are stored together. Even when this data is read from the critical value storage unit 100, it is handled in a group of {N, (x, y), T, L, Dcr, δcr, SIcr} as described above. Note that the data used when estimating damage such as pipe breakage that occurs in response to input earthquake motion information is substantially four types of data, n, (x, y), SIcr, and δcr. For example, T, L, and Dcr, which are other unused data, are separately stored as back data, for example, and the critical value storage unit 100 stores {n, (x, y), δcr, SIcr. } May be stored in a group. This is desirable because the amount of data to be stored and read can be reduced.

  As a division method for dividing the piping network into a plurality of segments (N = 1, 2, 3,...), For example, a square mesh with a side of 0.5 [km] is assumed, and the piping network is stretched by the mesh. It is possible to divide a predetermined area that is visited and treat each individual mesh as each segment. For example, the center point or the position of the centroid of each segment can be used as the data (x, y) of the position of the segment in the map. The mesh size is preferably set to an appropriate size in consideration of the balance between positional accuracy and the number of segments. In addition, it is meaningless to set the mesh to such a fine dimension that the display resolution is too fine with respect to the display resolution of the screen of the display device 302 that displays the map or the occurrence position of the damage. It is desirable to take the resolution of the display device 302 into consideration.

  Alternatively, although details will be described later, paying attention to the connection form (structural mechanical and geometrical piping shape) of the piping, the piping network is divided into a straight portion, a bent portion, and a T-shaped portion. It is also possible to subdivide them based on a classification method such as classifying them, and treat each part as a discrete segment. Also in this case, for example, the center point or the position of the centroid of each segment may be used as the data (x, y) of the position of the segment in the map.

  The data of the natural vibration period (T) or natural vibration wavelength (L) of the ground can be obtained by conducting a boring survey for each important point of the ground in a predetermined area where the piping network is disposed. For example, in the metropolitan area of Tokyo, Kanagawa, Chiba, and Saitama prefectures, a total of tens of thousands of drilling surveys were conducted on the ground at each key point where gas conduits were installed. It is possible to obtain measured values at each point. Alternatively, it goes without saying that existing (examined in the past) data regarding the ground in the area where the piping is disposed may be used.

  The data of critical deformation (Dcr) due to the direct vibration force (destructive force) of earthquake and the data of critical flow deformation (δcr) due to the fluidization of the ground caused by the earthquake are specific for each segment. Types related to general piping (for example, in the case of city gas piping networks, welded steel pipes, ductile cast iron pipes, gray cast iron pipes, etc.), caliber (inner diameter), material, and other specifications (eg, reinforced / not started) It can be obtained by analyzing the strength of the piping based on the various data. Or, further, based on the strength analysis results of the piping, etc., the critical deformation (Dcr) data and flow critical deformation (δcr) data are calculated, and the data are used to calculate the damage examples obtained from past earthquake case studies. You may make it aim at the further reliability improvement of data by calibrating based on information, such as data.

  More specifically, the critical deformation amount (Dcr) and the flow critical deformation amount (δcr) are both numerical values (physical quantities such as allowable stress or allowable displacement) relating to structural mechanical strength of pipes and valves. . Therefore, when the destructive force due to earthquake vibration is applied to the piping network as an external force, the critical deformation amount can be determined theoretically or experimentally by conducting a structural mechanical strength analysis or a destructive experiment. The values of (Dcr) and flow critical deformation (δcr) can be obtained.

  Regarding the analysis method of the structural mechanical strength of the pipe and valve at that time, for example, the pipe in a certain segment is regarded as a cylindrical structure made of a predetermined metal material, On the other hand, the critical deformation amount (Dcr) and the flow critical deformation amount (δcr) can be obtained by performing strength analysis by a finite element method.

  Or, taking into account the connection shape of the pipe, the pipe in one segment is classified into a straight part, a bent (curved pipe) part, and a T-branched part. It is also possible to obtain the critical deformation amount separately for each type and to employ the minimum value among them as the data of the critical deformation amount (Dcr) in the segment. Similarly, regarding the flow critical deformation (δcr), the pipes in one segment are finely classified based on the connection shape as described above, and the flow critical deformation is obtained for each individual type. Therefore, the minimum value among them can be adopted as the data of the flow critical deformation (δcr) in the segment.

  Based on the value of the critical deformation (Dcr) obtained as described above and the value of the natural vibration period (T) or natural vibration wavelength (L) of the ground in the segment, the critical ground motion value (SIcr) or A critical earthquake amplitude value (Ucr) is obtained.

  More specifically, as shown in FIG. 15, for example, the critical deformation amount (Dcr) of a pipe is a critical earthquake amplitude value (or allowable earthquake amplitude value) at which the pipe starts to break. The seismic amplitude value (Ucr) is uniquely determined. At this time, the critical deformation (Dcr) and the critical seismic amplitude depend on the natural vibration period (T) or natural vibration wavelength (L) of the ground where the pipe is buried. It has been confirmed that the graph (curve) showing the correspondence with the value (Ucr) is different. In other words, in general, regarding one pipe, two variables, that is, a critical deformation amount (Dcr) of the pipe and a natural vibration period T) or a natural vibration wavelength (L) of the ground in which the pipe is embedded. On the other hand, a functional relationship (that is, F (Dcr, T or L) = Ucr) is established in which one critical earthquake amplitude value (Ucr) is determined (that is, if F is a function, F (Dcr , T or L) = Ucr).

  Therefore, for example, when the critical deformation amount of a pipe in a certain segment is Dcr and the natural vibration period of the ground in which the pipe is embedded is T = 0.7 [s] (in this case, L = 200 [m]). The critical earthquake amplitude value Ucr in the segment can be obtained based on a curve in the case of T = 0.7 [s] (L: 200 [m]) as shown in FIG. Alternatively, for example, when the natural vibration period of the ground is T = 1 [s] (in this case, L = 400 [m]), a curve showing a more gradual monotonic increase than in the case of T = 0.7 [s]. Based on this, the value of Ucr can be obtained.

  Here, since an earthquake is a ground vibration phenomenon, a relationship expressed by the equation SIcr = 2π · Ucr / T is established between the critical earthquake amplitude value (Ucr) and the critical earthquake motion value (SIcr). Yes. Therefore, using this relational expression, the critical ground motion value (SIcr) can be obtained from the critical earthquake amplitude value (Ucr) obtained as described above. The critical ground motion value (SIcr) obtained in this way is finally used by the breakage occurrence estimation unit 200 to estimate the presence or absence of pipe breakage (damage) caused by the earthquake. Alternatively, the failure occurrence estimation unit 200 is set so as to estimate the presence or absence of damage to the pipe using the critical earthquake amplitude value (Ucr), and therefore, the critical earthquake amplitude as one element of the information on the ground motion for providing the analysis condition. When the value (Ucr) is set to be input via the input device 400, the critical earthquake amplitude value (Ucr) obtained as described above may be used directly. Needless to say, the calculation of the critical ground motion value (SIcr) corresponding to the critical earthquake amplitude value (Ucr) may be omitted.

  In recent years, seismic motion value (SI) data observed in an earthquake is easier to observe and obtain than other types of data, and is extremely suitable for calculating the external force applied to piping. It has become. Therefore, critical seismic motion values (SIcr) are obtained in advance in terms of easy acquisition and handling of such data and generalization as a standard unit for evaluation and judgment of seismic motion. It is desirable to set the seismic motion value (SIcr) and the seismic motion value (SI) included in the input seismic motion information to be compared by the failure occurrence estimation unit 200.

  On the other hand, for the critical flow deformation (δcr) data, the flow critical deformation may be calculated for all segments or all pipes, but ground fluidization due to the earthquake occurred. Actually, the amount of flow that causes damage to the pipes is actually limited to the vicinity of the revetment, and the displacement of the ground due to fluidization near the revetment is almost the same as the revetment line. The inventors have confirmed that the direction is often orthogonal. Therefore, for example, only pipes located in an area within 100 [m] from the revetment or a segment having such a pipe shall be handled as a target for damage occurrence estimation, and other pipes or segments shall be The storage of flow critical deformation (δcr) data and the operation of estimating the occurrence of damage based on the data may be omitted. By doing in this way, the advantage that the data amount and data processing for at least the omitted part can be simplified can be obtained. The critical flow deformation (δcr) is estimated when external force is applied to the pipe from a direction almost perpendicular to the revetment line, which is the direction in which ground displacement is most likely to occur due to fluidization. Needless to say, it is desirable to obtain it by performing structural mechanical strength analysis of the assumed piping.

  Similar to the critical deformation amount (Dcr), when obtaining the flow critical deformation amount (δcr) data, classification focusing on the connection form of the pipe such as a straight type, a curved pipe type, and a T-shape. According to the law, the piping network may be discretized into a plurality of segments, and strength analysis or the like may be performed for each segment. Alternatively, the flow critical deformation amount (δcr) is obtained in this way, and the flow critical earthquake motion value (SIcr ′) or the flow critical earthquake amplitude value (Ucr ′) that generates the flow critical deformation amount (δcr). Is calculated based on the correlation or relational expression between the seismic motion value that has already been confirmed and the flow amount, and the flow critical seismic motion value (SIcr ′) or seismic amplitude value (Ucr ′). May be set to be compared with the seismic motion value (SI) or seismic amplitude value (U) input as seismic motion information. However, it goes without saying that it is not limited to this.

  The breakage occurrence estimation unit 200 includes an SI comparison determination unit 201 and a δ comparison determination unit 202. The SI comparison / determination unit 201 compares the seismic motion value (SI) included in the input seismic motion information with the critical seismic motion value (SIcr) for each segment, and determines which segment of the position corresponding to the seismic motion. It is estimated whether or not the piping is damaged. Similarly, the δ comparison / determination unit 202 compares the flow amount (δ) estimated to be generated due to the earthquake motion and the flow critical deformation amount (δcr) for each segment or each predetermined segment, It is estimated which segment of the pipe will be damaged due to the fluidization of the ground due to the earthquake at that time.

  More specifically, when information on seismic motion values (SI) and information on seismic motion including information on the location of the epicenter are input from the input device 400 to the damage occurrence estimation unit 200, the SI occurrence determination of the damage occurrence estimation unit 200 is performed. The unit 201 reads data {N, (x, y), T, L, Dcr, δcr, SIcr; N = 1, 2, 3...} Regarding all segments stored in the critical value storage unit 100. For each individual segment, the seismic motion value (SI) is compared with the critical seismic motion value (SIcr), and the seismic motion value (SI) is greater than or equal to the critical seismic motion value (SIcr) (SIcr ≦ SI). Assuming that it occurs, the data of the position of the segment is sent to the display device 300. If the seismic motion value (SI) is less than the critical seismic motion value (SIcr) (SIcr> SI), it is estimated that the segment will not be damaged, and the data of the position of the segment is not transmitted.

  Further, the value of the amount of flow (δ) that is observed in the region within a predetermined distance from the revetment due to the fluidization of the ground included in the input information on the ground motion is the failure occurrence estimation unit 200. , The δ comparison / determination unit 202 of the breakage occurrence estimation unit 200 has piping in a region within a predetermined distance from the revetment among all the segments stored in the critical value storage unit 100. The segment data is selected and read, and for each of the read segments, the flow amount value δ is compared with the flow critical deformation amount value δcr. It is estimated that a segment having a value equal to or larger than (δcr) (δcr ≦ δ) is broken, and the data of the position of the segment is sent to the display device 300. However, when the flow amount (δ) is less than the flow critical deformation amount (δcr) (δcr> δ), it is estimated that the segment does not break.

  Here, for a segment having a critical ground motion value (SIcr> SImax) larger than the ground motion value (SImax) corresponding to the largest earthquake that may occur within a predetermined area, such as 200 [kine] or more. Since it means that it is earthquake resistant even for such a maximum-scale earthquake, it may be preliminarily estimated as “constantly no damage”. Similarly, when the critical earthquake amplitude value (Ucr) is used instead of the critical earthquake motion value (SIcr), the critical earthquake amplitude larger than the earthquake amplitude value (Umax) corresponding to the largest possible earthquake that may occur. A segment having a value (Ucr> Umax) may be estimated in advance as “constantly no damage”. For such a pipe having sufficient strength (SIcr or Ucr), by predetermining that “constantly no breakage” in advance, at least the earthquake motion value (SI) and the critical earthquake motion value (SIcr) This is desirable because it is possible to omit the time and effort required for comparison (time and data processing required), and further simplify the earthquake damage estimation method and further reduce the amount of data processing required.

  Similarly, for the damage caused by fluidization of the ground, the maximum flow amount that may occur in the vicinity of the revetment in a predetermined area where the piping network is provided (for example, 5 [m] or more). For segments having a flow critical deformation amount (δcr> δmax) greater than δmax), it is assumed that they will not break even if such a maximum level of fluidization occurs. You may make it keep. Note that the values such as SImax = 200 [kine] and δmax = 5 [m] are given as examples, and are not limited to such numerical values in practice. Needless to say. In addition, for a segment that is estimated to be “no damage permanently”, information (for example, a flag) indicating that it is not necessary to perform an earthquake damage estimation based on the seismic motion value or the flow amount is assigned to the segment. It is desirable to add them to the group of data {n, (x, y), T, L, Dcr, δcr, SIcr} and store them in the critical value storage unit 100.

  Furthermore, the damage estimation of a low voltage | pressure conduit | pipe is demonstrated here. In order to estimate the damage of low-pressure pipes with good accuracy, the damage ratio estimation formula was created by conducting damage analysis in the Hyogoken-Nanbu Earthquake, focusing on the ground conditions, especially for threaded joint steel pipes. The analysis results were used. That is, in order to express the characteristics of the damage rate in a concise and accurate manner, the form of the damage rate estimation formula is R = C1, C2, φ (SI). Here, R is an estimated damage rate (cases / km), C1 is a coefficient for increasing or decreasing the damage rate according to the ground condition classification, and C2 is a coefficient for increasing or decreasing the damage rate according to the degree of liquefaction. φ (SI) is the damage rate under the standard ground conditions, and is defined as the damage rate in the alluvial plain where the total length of the conduit is large (most low-pressure conduits are densely packed). SI is the SI value of earthquake motion. When liquefaction occurs, the relationship of damage to the SI value tends to be unclear, so it is desirable to capture the effect of liquefaction separately at C2. The damage rate φ (SI) is calculated by an equation as shown in FIG. In the equation shown in FIG. 11, the proof stress of the low-pressure conduit converted to the SI value is logarithmically distributed, and the damage rate is obtained by multiplying the probability that the SI value exceeds the proof strength (damage probability) by the maximum possible damage rate. Assume that. Here, R0 is the maximum value of the damage rate expected in the alluvial plain, and λ and ξ are the mean and variance of the lognormal distribution, respectively. From this equation, it can be seen that the damage rate increases as the SI value increases, and as the SI value increases, it gradually approaches R0. R0, λ, and ξ are obtained by performing regression analysis by adding the data corresponding to the alluvial plains among the earthquakes surveyed as data with SI values of 60 [kine] or less to the damage analysis results in the “alluvial plains”. It is a thing. As a result of comparing the estimated damage rate based on the estimation formula created in this way with the actual damage rate when the disaster was caused by the occurrence of an actual earthquake, the estimated result shows a good agreement with the actual damage rate. confirmed. Therefore, in the earthquake disaster prevention system according to the present embodiment, by using information such as a calculation formula obtained from a statistical analysis or the like about the damage at the time of the actual earthquake occurrence, the low-pressure conduit is further improved with better accuracy. Damage estimation can be performed.

  The display device 300 is for performing display output in the terminal device 10, and includes a data processing circuit 301 and a display device 302 as main parts thereof. In this display device 300, when data on the position of a segment estimated to cause damage to piping due to earthquake motion or ground fluidization is sent from the damage occurrence estimation unit 200, the data processing circuit 301 Corruption has occurred in the map displayed by the display device 302 based on the segment position data (x, y) sent and the map data of the entire area where the piping network is provided. Display data for displaying, for example, a pinpoint position where the position is estimated is generated. The display device 302 uses, for example, a liquid crystal display device capable of color display, a CRT, or the like, and on the display screen, an image of a map of the entire predetermined area and an image of the occurrence position of damage indicated by pinpoints therein Are combined and displayed.

  For example, the ground color of the entire map is set to green, and the piping network is classified according to, for example, pressure grades, and each classification is indicated by a different color such as yellow or blue. Then, in such a map, the position estimated to cause the pipe breakage in response to the earthquake motion is displayed in a conspicuous warning color such as red. Furthermore, the warning pinpoint display at the position where the occurrence of damage to the pipe is estimated may be blinked. The location of the damage caused by the earthquake motion and the location of the damage caused by the fluidization of the ground are displayed in different colors and blinking, etc. It may be possible to distinguish at a glance. Further, in this display device 302, the governor 31 that is opened or closed automatically or remotely is displayed in a closed state (open / closed state), for example, the governor 31 that is in the open state is displayed in blue, and the governor 31 that is in the closed state. It is desirable to be able to distinguish at a glance, such as displaying in red.

  It should be noted that such formats as the location where piping breakage occurs, the type of color depending on the type of the cause, and the graphic shape of the map are displayed on the display device 300 based on information collected when an actual earthquake occurs. When displaying a map-like image as shown in FIG. 13, it is desirable to display it in the same format. However, in order to be able to clearly distinguish whether the display is in the earthquake disaster prevention mode at the time of the actual earthquake occurrence or the simulation mode at the time of training, for example, a screen to be displayed for each mode It is desirable to set to change the background color. For example, it is effective to set the background color of the displayed screen to yellow in the simulation mode at the time of training, and to set the background color of the displayed screen to red in the case of the earthquake disaster prevention mode when an actual earthquake occurs. . Alternatively, a block in which information based on data actually collected from the local earthquake remote monitoring device 30 is displayed and a block in which information generated by simulation is displayed are mixed in one screen. In such a case, a different color may be displayed for each mode of the block.

  As described above, the server 20 estimates a damage occurrence place (a place where damage such as breakage due to the earthquake occurs) in the piping network in accordance with the input information of the seismic motion. Then, the information of the estimation result is displayed and output by the display device 300 of the terminal device 10. Further, it may be printed out by a printing apparatus (not shown). In addition, the estimation result data generated as described above is stored in the storage device 40.

  In addition, since it has a so-called automatic seismic cutoff function that automatically shuts off the governor 31 when it receives an earthquake motion with a magnitude greater than a predetermined earthquake amplitude value, such an automatic seismic cutoff function of the governor 31 is provided. Include damage as an element of boundary conditions, analysis conditions, etc., and perform damage estimation and pressure / leakage analysis.

  In this case, ideally, for one seismic motion having a magnitude exceeding a predetermined value, all the governors 31 in the piping network of the same region should be shut off at the same time. However, in reality, the ground conditions for the seismic motion such as the resonance frequency and the ease of shaking often differ depending on the location where each governor 31 is installed. There may be a case in which the seismic cutoff is executed at the governor 31 at the point and the cutoff is not performed at the governor 31 at another point. Therefore, in the case of the piping network having the governor 31 having such an automatic seismic seismic cutoff function, for example, the ease of shaking with respect to the seismic motion at each point is evaluated in advance, and a weighting coefficient (0 to 1) is calculated. For example, when the information on the magnitude of the earthquake motion is set to be input as an SI value, the SI value is multiplied by the weighting coefficient w of each governor 31. Then, by comparing with a cutoff critical SI value at which the cutoff is performed by the governor 31 (this is SIsh, for example), the governor 31 that is blocked for one earthquake motion and the governor 31 that is not blocked Can be estimated.

  For example, an SI value indicating the magnitude of an earthquake included as an element of input earthquake motion information is a value S, and the ease of shaking of the governor 31 that is the object of estimation of the presence or absence of interruption is evaluated. If the weighting coefficient is w and the cutoff critical SI value of the governor 31 is SIsh, the presence or absence of cutoff of the governor 31 is a value obtained by multiplying S and w is less than the value of SIsh. In such a case (S · w <SIsh), it is estimated that the governor 31 does not block, and when it is equal to or greater than the value of SIsh (S · w ≧ SIsh), the governor 31 performs blocking. Presumed.

  Or, without relying on such automatic estimation, the user directly selects an arbitrary governor 31 from among the governors 31 in the piping network, and only the governor 31 performs blocking corresponding to the earthquake motion. It goes without saying that the server 20 and the analysis device 50 may virtually create such a state.

  Based on the information on the damage occurrence location estimated by the server 20, the analysis device 50 determines the gas pressure state (positional pressure distribution and the temporal transition of the pressure value at each position) in the piping network and the gas leakage state. (A time transition of a gas leakage occurrence position and a gas leakage state at each position) is analyzed. Therefore, it goes without saying that the analysis device 50 is completely different from, for example, an analysis device that performs a numerical wind tunnel analysis on the behavior of a fluid in a general straight pipe.

  The analysis on the pressure state / leakage state of the gas in the piping network performed by the analysis device 50 will be described in more detail.

  In this analysis device 50, basically, the entire piping network is divided into one unit block as described with reference to FIGS. 12 and 13 above, and the time of gas leakage due to piping damage is determined for each block. Analyze changes and changes in pressure state. Then, the analysis results for each block are collected, and the analysis result data for the entire piping network is output.

  FIG. 17 assumes a basic configuration of the piping configuration in one block in which the combination of the low-pressure conduit and the intermediate-pressure conduit and the governor 31 and the piping shape is simplified, and the gas pressure state when the piping configuration is damaged. -It is a figure for demonstrating an example of the analysis methods, such as a time transition of a leakage state. Here, the cross-sectional area of the low-pressure conduit 42 is uniformly AL, the total extension of the series of low-pressure conduits 42 is L, the normal gas set pressure is PL-nol, and the external air pressure is PG. It is assumed that a broken point is generated at one point in the low-pressure conduit 42 and the flow rate per unit time of gas leakage from the broken point is Q. A series of low-pressure conduits 42 in one block are connected to the intermediate-pressure conduit 41 via a governor 31. However, except for this portion, both ends are closed by a block valve 47 (not shown in FIG. 17). It can be regarded as a closed space.

  When the governor 31 is shut off automatically in response to earthquake motion or manually by remote operation, the piping configuration in this one block is a tubular shape as shown in FIG. It can be thought of as a closed space. Therefore, in such a case, when the piping breaks down, the gas leakage at the flow rate Q continues thereafter, and the gas pressure PL in the low-pressure conduit 42 changes from the normal set pressure PL-nol to the external pressure PG. Go down. The gas leakage stops when the pressure PL of the gas in the low-pressure conduit 42 is balanced with the external pressure PG (when PL = PG). Therefore, the time-series transition (temporal change) of the pressure P of the gas in the low-pressure conduit 42 in this case is the pressure PL over the time Δt as shown in FIG. 18B as an example. It seems that it gradually decreases over ΔP from PL-nol to the external pressure PG.

  Alternatively, as shown in FIG. 19A, when the governor 31 is in an unblocked state, the governor 31 has a pressure PL in the low-pressure conduit 42 corresponding to a pressure drop caused by gas leakage. In order to return the gas to the normal state, the gas supply flow rate from the intermediate pressure conduit 41 to the low pressure conduit 42 is increased. For this reason, when the gas is supplied from the intermediate pressure conduit 41, which is set to a pressure PM higher than the pressure PL in the low pressure conduit 42, to the low pressure conduit 42, the pressure PL of the gas in the low pressure conduit 42 causes damage to the pipe. The pressure value is higher than the normal set pressure PL-nol without any pressure. Further, the flow rate Q of the gas leakage in this case is larger than that in the case where the governor 31 is in the cutoff state. Moreover, this state continues unless the governor 31 is shut off. Accordingly, the time-series transition of the gas pressure PL in the low-pressure conduit 42 in this case, as shown in an example in FIG. 19B, immediately after the pipe breakage occurs, the gas caused by the gas leakage The pressure PL in the low pressure conduit 42 slightly decreases from the normal pressure PL-nol due to the loss of gas, but the governor 31 supplies a large amount of gas to the low pressure conduit 42 at the pressure PM in response to the pressure decrease. As a result, the pressure PL in the low-pressure conduit 42 eventually becomes higher than the normal pressure PL-nol. This state is continued until the governor 31 is turned off. For example, when the governor 31 is switched to the shut-off state by remote operation, the pressure state changes as shown in FIG. 19B, and the gas pressure PL in the low-pressure conduit 42 is balanced with the external pressure PG. The gas leakage stops.

  The pressure state and gas leakage state in one block are generally in any of the above two types of time-series transitions or a combination of them.

  The specific pattern of the temporal change in the flow rate Q and the pressure P is assumed to be an exponential function as shown in FIG. 18B, for example. The time change pattern in the actual piping network is confirmed in advance by a gas leak experiment or the like and converted into a function. Using the function, specific numerical values such as the set pressure PL-nol, the external pressure PG, and the flow rate Q are calculated. It can be analyzed by substituting. Further, the time Δt during which the gas leakage continues represents the temporal change pattern of the flow rate Q and the pressure P, with the time until the pressure P decreases from the set pressure PL-nol to the external pressure PG as a boundary condition. It can be calculated based on the function. Further, the total amount of leaked gas can be calculated by integrating the flow rate Q over time Δt.

  When there are a plurality of pipe damage points, the simplest analysis method is to calculate the linear sum of the gas leakage flow rate Q and pressure change ΔP at the plurality of points, thereby calculating the inside of one block. It is possible to obtain an analysis result of the pressure state and the gas leakage state at the same time.

  The analysis device 50 summarizes the analysis results of the pressure state and the gas leakage state for each block individually analyzed in this way, thereby analyzing the analysis result of the time series transition of the pressure state and the gas leakage state of the entire piping network. Can be obtained. The result of the analysis is, for example, a pipe damage location as an image in a format almost similar to the map image displayed at the time of the actual earthquake as shown in FIGS. 12 and 13 on the screen of the display device 302 of the terminal device 10. 18B and the analysis results of the time-series transition of the pressure state and the gas leakage state at the location selected by the user from the map image are graphs as shown in FIGS. It is possible to execute a simulation of a damage state estimated to be caused by a virtual earthquake of the piping network. Further, the analysis result data can be stored in the storage device 40.

  The storage device 40 stores the data of the analysis result performed by the analysis device 50 as described above in association with the earthquake motion information input as the analysis condition. By doing so, the user can perform information such as a ground motion (x, y) and seismic intensity (SI) on the ground motion information from the data stored and stored in the storage device 40 through a training simulation or the like. The terminal device 10 can read out the information on the analysis result of the pressure state and the leakage state corresponding to the earthquake motion assuming the desired seismic source position and seismic intensity, as a search keyword when performing.

  Furthermore, the information on the analysis result of the pressure state and the leakage state corresponding to the earthquake motion is associated with the remote operation information of the governor 31 and accumulated in the storage device 40 as the history of the earthquake disaster prevention training or the past log data. By doing so, it is also desirable to read it later so that it can be used as information or the like for conducting a case study of earthquake disaster prevention training.

  Alternatively, as the piping network earthquake damage state simulation system according to the present embodiment is repeatedly used, the data stored in the storage device 40 is the pressure state and leakage of various situations corresponding to various analysis conditions. Such data will not only be used for simulations for earthquake disaster prevention training, but also, for example, when an earthquake disaster actually occurs, the piping network ( If it is difficult or impossible to collect information on the damage status and gas shut-off status of the medium-pressure conduit 41 and the low-pressure conduit 42) and governor 31, etc. in Japan, It can also be used to perform simulations for estimating the damage situation in the affected area with high accuracy. Or conversely, various data collected at the time of the actual occurrence of the earthquake stored in the main storage device 21 may be read out and used at the time of training. By doing in this way, it is possible to realize very realistic training only by training using information collected when an earthquake actually occurs. Thus, in the system according to the present embodiment, the information (data) collected at the time of the occurrence of the earthquake stored in the main storage device 21 can be read and used during training, and the storage device 40 can be used. The information (data) generated (analyzed or estimated) stored during training can be read out and used when an actual earthquake occurs. This is possible because this system centered on the server 20 has both a function as a disaster prevention system in the event of an earthquake and a function as a simulation system during training in a single system. It is. Moreover, in the system according to the present embodiment, this is possible without complicating the entire system.

  The terminal device 10 has a function as a seismic motion information input means for inputting information on seismic motion used as a boundary condition and an analysis condition for analysis in the damage estimation and analysis device 50 performed by the server 20, and the server 20 A function as a virtual damage occurrence location information input means for directly inputting information on the damage occurrence location virtualized by the user or the like separately from the estimation result of the damage occurrence location into the analysis device 50, and a governor virtualized by the user or the like 31 functions as a virtual remote operation input means for performing virtual remote operation input to 31, a function as damage estimation result information output means for outputting information of estimation results by the server 20, and an analysis result by the analysis device 50 Information, information read from the storage device 40 or the main storage device 21, or a server A function as information output means for reading various information collected from each earthquake remote monitoring device 30 by 0 and displaying it on the screen of the display device 300 together with a map display of the piping network, etc., and a location desired by the user The remote monitoring unit 30 is accessed via the server 20 and the remote shut-off unit 36 is remotely operated to forcibly shut off the governor 31 and control all shut-off valve devices in one block to the shut-off state. The function as a remote operation input means at the time of an earthquake (for disaster prevention) in which a command message for performing an operation and a command message for remotely controlling the shutoff by remotely operating the governor 31 individually are input to the server 20. Have both.

  In the terminal device 10, the various information is input by an input device 400 such as a numeric keypad or a mouse, and the various information is output by a display device 302 such as a CRT or a liquid crystal display device. And a data processing circuit 301. Alternatively, various information may be output by a print output device such as a printer device (not shown).

  Here, the information input by the input device 400 is transmitted to the server 20 or the analysis device 50 by appropriately performing data processing by an information processing device such as a personal computer main body which is the main body of the terminal device 10. Needless to say, it is set to.

  Further, information output from the server 20 or the analysis device 50 is appropriately processed by an information processing device such as a personal computer, and then sent to the display device 300, such as a CRT in the display device 300. It is displayed on the screen of the display device 302. Alternatively, it is sent to a printing apparatus and printed out as a chart or the like showing gas leak occurrence locations and pressure distribution in the piping network.

  Although this terminal device 10 may be used singularly, a plurality of terminals are prepared, and one of them is used to input the analysis conditions and control the progress of the training simulation. Others may be used for the trainee to receive simulation training.

  In each of the above embodiments, the general telephone line 39 is used as a communication means for performing communication between the remote monitoring device 30 at the time of earthquake and the server 20 at each location. In addition to this, it goes without saying that, for example, a dedicated line using a fiber optic line or a wireless communication network having a plurality of channels is also applicable. Moreover, although the case where combustible gas was assumed as a fluid of analysis object of a pressure and a leakage state was demonstrated, it is not limited only to this. Other than this, for example, a piping network for transporting liquid fluids such as oil and water supply and sewerage water, and a predetermined building as well as a piping network laid almost flat in a predetermined area. Needless to say, the present invention can also be applied to a piping network or the like arranged three-dimensionally inside.

It is a figure showing the outline | summary structure of the earthquake disaster prevention system which concerns on the 1st Embodiment of this invention. It is the figure which represented typically the communication method performed between the remote monitoring apparatus at the time of an earthquake, and the modem of a server. It is the figure which represented typically the communication method performed over multiple cycles between the remote monitoring apparatus at the time of an earthquake, and the modem of a server. FIG. 2 is a diagram schematically showing a communication method in which a plurality of modems are grouped in advance, and a call is made to one modem for each group. It is the figure which represented typically the method of grouping several modems beforehand and performing the communication method which makes a call with respect to one modem for every group over several cycles. It is the figure which represented typically the redial method which concerns on 2nd Embodiment in a format like a timing chart. It is the figure which represented typically the random redial method which concerns on 2nd Embodiment in a format like a timing chart. It is the figure which represented typically the allocation method of the calling and polling with respect to several modems in the earthquake disaster prevention system which concerns on 3rd Embodiment. It is the figure which represented typically about the time division | segmentation method of the content of communication. It is a figure for demonstrating the server in the earthquake disaster prevention system which concerns on 4th Embodiment. It is the figure which expressed further the structure of the principal part of the remote monitoring apparatus at the time of an earthquake in the earthquake disaster prevention system which concerns on 1st thru | or 4th embodiment. It is the figure showing an example of the piping composition in the block of 1 unit of those at the time of dividing the whole piping network into each unit block, and its geographical image display. Figure (B) which simplified shows an example of the image display about the gas leakage state caused by the occurrence of damage to piping and the like in one block and the governor's unblocked state, and then all the governors in the one block It is the figure (A) which simplified and represented an example of the image display of the state which interrupted all at once by remote control. It is the figure which represented in detail the structure of the principal part of the server in the earthquake disaster prevention system which concerns on 1st thru | or 4th embodiment. It is a graph which shows the correspondence of critical deformation (Dcr) and critical earthquake amplitude value (Ucr). It is the figure which represented an example of the calculation used for the difference which estimates the damage of a low voltage | pressure conduit | pipe with the numerical formula. Assuming the basic configuration of the piping configuration in one block with the simplest combination of low-pressure and medium-pressure conduits and governors and the piping shape, the time of gas pressure state and leakage state when the piping configuration is damaged It is a figure for demonstrating an example of the analysis methods, such as a target transition. A diagram (A) that schematically shows an example of a gas leak state when piping, etc. in a unit block is damaged and the governor is shut off, and the time series of pressure and leak state in that case It is a figure (B) showing a target transition. A diagram (A) that schematically shows an example of the gas leak state caused by the occurrence of damage to piping, etc. in the unit block and the uncut state of the governor, and the time-series transition of pressure and leak state in that case FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Terminal device, 20 ... Server, 21 ... Main storage device, 30 ... Earthquake remote monitoring device, 40 ... Storage device, 50 ... Analysis device, 60 ... Modem, 200 ... Virtual communication part, 201 ... Virtual call Communication unit 202 ... Virtual polling communication unit 203 ... Training virtual information generation unit 210 ... Training function unit 220: Earthquake occurrence function unit 300 ... Display device 400 ... Input device

Claims (28)

An earthquake information collecting device having a plurality of modems or receiving devices and having a function of communicating information to an external remote monitoring device at the time of earthquake via a telephone line or communication means;
It is arranged in more places than the number of lines or channels that can be received by the modem or the receiving device in a piping network for transporting a predetermined type of fluid. And a function of communicating the information when a call is made to the modem or the receiving device via the telephone line or the communication means to ensure a communicable state. A remote monitoring device,
If each of the seismic remote monitoring devices makes a call to the modem or one of the receiving devices once and cannot establish a communicable state, it continues to try the call. An earthquake disaster prevention system, characterized in that it is set to try to make a call to a modem or receiving device that has not tried to make a call that is different from the modem or receiving device for which communication was not possible. 2. The earthquake according to claim 1, wherein the earthquake remote monitoring device groups the plurality of modems or receiving devices in advance, and places the call to one modem for each group. Disaster prevention system. The seismic remote monitoring device is the same as the modem or receiving device already tried in the previous call in the next call attempt for all the groups after the call attempts for all the groups are completed. The earthquake disaster prevention system according to claim 2, wherein a call is attempted to a different untrial modem or receiving device. An earthquake information collecting device having a plurality of modems or receiving devices and having a function of communicating information to an external remote monitoring device at the time of earthquake via a telephone line or communication means;
It is arranged in more places than the number of lines or channels that can be received by the modem or the receiving device in a piping network for transporting a predetermined type of fluid. And a function of communicating the information when a call is made to the modem or the receiving device via the telephone line or the communication means to ensure a communicable state. A remote monitoring device,
If each of the earthquake remote monitoring devices makes a call once to the modem or one of the receiving devices and cannot establish a communicable state, the remote monitoring device continues to the modem or receiving device. , Redialing after the redial waiting time that is different for each earthquake remote monitoring device, and for the second and subsequent redials following the redialing, the same redial waiting time for all the remote monitoring devices during earthquake An earthquake disaster prevention system that is set to be performed after the passage of time. An earthquake information collecting device having a plurality of modems or receiving devices and having a function of communicating information to an external remote monitoring device at the time of earthquake via a telephone line or communication means;
In a piping network that transports a predetermined type of fluid, the number of lines or channels that can be received by the modem or the receiving device is larger than the number of lines, and each is located at that point when an earthquake occurs. And a function of communicating the information when a call is made to the modem or the receiving device via the telephone line or the communication means to ensure a communicable state. Equipped with an earthquake remote monitoring device,
If each of the remote monitoring devices at the time of an earthquake makes a call to the modem or one of the receiving devices once and cannot establish a communicable state, random redialing is performed for the second and subsequent redialing. An earthquake disaster prevention system that is set to redial after the waiting time has elapsed. Each of the earthquake remote monitoring devices mixes a redial attempt after a different redial waiting time and a redial attempt after the same redial waiting time during a plurality of redial attempts. The earthquake disaster prevention system according to claim 4 or 5, characterized in that. The earthquake remote monitoring device has a shut-off valve device that shuts off the fluid conduction,
The earthquake information collection device has a polling function for communicating information on a remote operation of the shut-off valve device with respect to the earthquake remote monitoring device or information on the control state of the shut-off valve device,
A predetermined number of all the modems or the receiving devices are assigned exclusively for the polling, and the remaining modems or receiving devices are set to be assigned with priority on the polling. The earthquake disaster prevention system according to any one of claims 1 to 6. The earthquake information collection device is set to secure a free line or a free channel at a ratio to the number of usable telephone lines or the number of channels, which is determined in advance according to the importance of the content of information to be communicated. The earthquake disaster prevention system according to any one of claims 1 to 7, wherein: An earthquake information collecting device having a plurality of modems or receiving devices and having a function of communicating information to an external remote monitoring device at the time of earthquake via a telephone line or communication means;
It is arranged in more places than the number of lines or channels that can be received by the modem or the receiving device in a piping network for transporting a predetermined type of fluid. And a function of communicating the information when a call is made to the modem or the receiving device via the telephone line or the communication means to ensure a communicable state. A remote monitoring device,
A function for performing virtual communication as if the earthquake information collection device is virtually collecting calls and performing virtual polling by receiving a call with the earthquake remote monitoring device An earthquake disaster prevention system characterized by further comprising: The earthquake information collection device generates virtual data of the timing of communication with the earthquake remote monitoring device and information content to be communicated based on input earthquake motion data, and The earthquake disaster prevention system according to claim 9, wherein the communication is performed. The information is at least one of information related to seismic motion, information related to the pressure of the fluid, information related to the flow rate of the fluid, and information related to the state of the shut-off valve device. The earthquake disaster prevention system according to any one of the items. The earthquake disaster prevention system according to any one of claims 7 to 11, wherein the earthquake information collection device performs the polling according to a predetermined priority order in descending order of importance of polling contents. . The earthquake information collection device is dedicated to ensuring a communicable state by receiving a call from the earthquake remote monitoring device within a predetermined time from the occurrence of the earthquake when the earthquake occurs, and the predetermined time has elapsed The earthquake disaster prevention system according to any one of claims 7 to 12, wherein the earthquake disaster prevention system is set to enable the polling later. The earthquake disaster prevention system according to claim 13, wherein the earthquake information collection device performs the polling with priority over the call after the predetermined time has elapsed. A seismic information collection device that has multiple modems or receivers and has the function of communicating information to an external remote monitoring device at the time of an earthquake via a telephone line or communication means, and a predetermined type of fluid to be transported In the piping network, the number of lines or the number of channels that can be received by the modem or the receiving device is arranged in more locations, each of which collects information at the location when an earthquake occurs, An earthquake remote monitoring device having a function of communicating the information when a modem or the receiving device each makes a call via the telephone line or the communication means to ensure a communicable state An earthquake disaster prevention communication method in the earthquake disaster prevention communication method,
In the case where a call is not made once to the modem or one of the receiving devices and the communicable state cannot be ensured, the modem that has been unable to secure the communicable state by already trying the call or An earthquake disaster prevention communication method characterized in that an outgoing call is attempted to a modem or a receiving device that has not made a call different from the receiving device. The earthquake disaster prevention communication method according to claim 15, wherein the plurality of modems or reception devices are grouped in advance, and the call is made to one modem for each group. After all the call attempts have been made for all the groups, the next call attempt for all the groups has an unsuccessful modem or receiver that is different from the modem or receiver that has already tried the previous call. The earthquake disaster prevention communication method according to claim 16, wherein a call is attempted to the. An earthquake information collecting apparatus having a plurality of modems or receiving apparatuses and having a function of communicating information to an external earthquake remote monitoring apparatus via a telephone line or communication means, and a predetermined type of fluid as a transport target A number of lines or channels that can be received by the modem or the receiving device in the pipe network, each of which collects information at the location when an earthquake occurs, and the modem Or an earthquake having a remote monitoring device at the time of an earthquake having a function of communicating information when a call is made to the receiving device via the telephone line or the communication means to ensure a communicable state An earthquake disaster prevention communication method in a disaster prevention system,
If communication is not ensured by making a call once to the modem or one of the receiving devices, the modem or the receiving device continues to be different for each remote monitoring device during an earthquake. Earthquake disaster prevention characterized in that redialing is performed after the redial waiting time has elapsed, and the second and subsequent redials subsequent to the redialing are performed after the same redial waiting time has elapsed in all remote monitoring devices during earthquakes. Communication method. An earthquake information collecting apparatus having a plurality of modems or receiving apparatuses and having a function of communicating information to an external earthquake remote monitoring apparatus via a telephone line or communication means, and a predetermined type of fluid as a transport target A number of lines or channels that can be received by the modem or the receiving device in the pipe network, each of which collects information at the location when an earthquake occurs, and the modem Or an earthquake having a remote monitoring device at the time of an earthquake having a function of communicating information when a call is made to the receiving device via the telephone line or the communication means to ensure a communicable state An earthquake disaster prevention communication method in a disaster prevention system,
If communication is not ensured by making a call to the modem or one of the receiving devices once, redialing after the random redial waiting time for the second and subsequent redialing A featured earthquake disaster prevention communication method. 20. The redial attempt after different redial waiting times and the redial attempt after the same redial waiting time are mixed in a plurality of redial attempts. Earthquake disaster communication method. The seismic remote monitoring device has a shut-off valve device that shuts off the fluid conduction, and the seismic information collecting device performs remote operation of the shut-off valve device with respect to the seismic remote monitoring device. It has a polling function for exchanging commands or information on the control state of the shut-off valve device, and a predetermined number of all the modems or the receiving devices are allocated exclusively for the polling, and the other remaining modems Alternatively, the polling is preferentially assigned to the receiving device. 21. The earthquake disaster prevention communication method according to any one of claims 15 to 20. A free line or a free channel is secured at a ratio to the number of usable telephone lines or channels that is determined in advance according to the importance of the content of information to be communicated. The earthquake disaster prevention communication method according to any one of the items. An earthquake information collecting apparatus having a plurality of modems or receiving apparatuses and having a function of communicating information to an external earthquake remote monitoring apparatus via a telephone line or communication means, and a predetermined type of fluid as a transport target A number of lines or channels that can be received by the modem or the receiving device in the pipe network, each of which collects information at the location when an earthquake occurs, and the modem Or an earthquake having a remote monitoring device at the time of an earthquake having a function of communicating information when a call is made to the receiving device via the telephone line or the communication means to ensure a communicable state An earthquake disaster prevention communication method in a disaster prevention system,
Virtual communication between the earthquake information collecting device and the earthquake remote monitoring device is performed as if a virtual call is received and virtual information is collected or polled. A featured earthquake disaster prevention communication method. Generate virtual data of the timing of communication between the earthquake information collection device and the earthquake remote monitoring device and information content to be communicated based on the input earthquake motion data, and 24. The earthquake disaster prevention communication method according to claim 23, wherein communication is performed. 25. The information is at least one of information on seismic motion, information on the pressure of the fluid, information on the flow rate of the fluid, and information on the state of the shutoff valve device. The earthquake disaster prevention communication method according to any one of the items. The earthquake disaster communication method according to any one of claims 21 to 25, wherein the polling is performed according to a predetermined priority order in descending order of importance of polling contents. The earthquake information collection device is dedicated to ensuring a communicable state by receiving a call from the earthquake remote monitoring device within a predetermined time from the occurrence of the earthquake when the earthquake occurs, and the predetermined time has elapsed 27. The earthquake disaster prevention communication method according to any one of claims 21 to 26, which is set to enable the polling later. 28. The earthquake disaster prevention communication method according to claim 27, wherein the earthquake information collection device performs the polling with priority over the call after the predetermined time has elapsed.

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