JP3248665B2 - Remote monitoring device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a remote monitoring device at a data collection site such as a governor of a city gas supply system.

[0002]

2. Description of the Related Art The current patrol inspection work in a governor for supplying city gas involves leak inspection every seven days based on security regulations.
It is implemented for the purpose of collecting pressure recording paper and the like. For this reason, a recorder for recording the primary pressure, the secondary pressure, and the governor opening is installed in the governor chamber containing the governor. The recorder records the measurement data on a recording sheet. The recorded data is collected, brought back, and processed collectively by a host computer or the like.

[0003] On the other hand, there is an attempt to remotely monitor governors installed at many places by a common center monitoring device. For example, as an attempt, a data collection device equipped with communication means with the center monitoring device is installed in each governor, monitoring measurement data collected by the data collection device and temporarily recorded on a volatile recording medium, There is a method in which the center monitoring device transmits the call to the center monitoring device through a communication line through a periodic call, and the center monitoring device collects the data to record and determine an abnormality or the like. In this method, a communication abnormality is detected at the time of periodic communication from the center monitoring device, and the data collection device itself does not have a function for detecting the communication abnormality.

[0004]

In the former method, the governor cannot be monitored in real time, the processing after data collection is very troublesome, and the above inspection is indispensable.

In the latter method, the amount of data collected by the center monitoring device becomes enormous, and the amount of arithmetic processing such as abnormality determination becomes enormous.
Human resources, that is, system resources, are enormous and impractical.

In the latter method, data recorded on a volatile recording medium is transmitted to a center monitoring device within a predetermined time and then cleared to be used for recording the next data. Then, the reliability of the data collected by the center monitoring device is lost. Therefore, the present invention
It is an object to solve such a problem.

[0007]

In order to solve the above-mentioned problems, the present invention provides an on-site processing device installed at a data collection site and a common center monitoring device connected to a number of on-site processing devices via a communication line. The on-site processing device includes a main body processing unit including a monitoring data collection unit, a data recording unit on a non-volatile recording medium, and a data abnormality monitoring unit, and a communication processing unit for the center monitoring device. The communication processing unit includes a plurality of communication lines with the center monitoring device,
A plurality of communication ports that can be connected to these communication lines and that can operate at the same time are provided, and the main processing unit requests the communication processing unit to report to the center monitoring device when the abnormality monitoring unit determines an abnormality. And a function to record a communication error in response to the response of the communication processing unit to the request, and a function to periodically request a response from the communication means. In response to this, a function to select a communicable communication port and communication line to notify the center monitoring device and a function to return a response corresponding to the result to the main processing unit are configured. We propose a remote monitoring device that has a function to call a local processing device and read out a communication error record.

In the present invention, it is proposed that the communication processing section of the on-site processing apparatus has a function of selecting center monitoring apparatuses installed at a plurality of locations in addition to a communication port and a communication line.

In the above configuration, a request for a periodic response from the main processing unit to the communication processing unit may be made by communication between CPUs or by a watchdog timer.

[0010]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 schematically shows the entire configuration of the present invention. Reference numerals 1 (1a, 1b,..., 1n) denote governor chambers installed at appropriate places in a city gas supply system. Along with the governor main body 2, a measuring device group such as an opening meter of the governor main body 2, a pressure sensor on the primary side and a secondary side of the governor main body 2, a flow meter, a gas detector, a governor cut-off detection sensor, an SI sensor abnormality detection sensor Various monitoring devices (not shown) such as an abnormality detection device group are installed, and the data collection site is used for governor monitoring. The on-site processing device 3 that collects and processes data from these various devices is installed outside the governor room 1.

Reference numeral 4 denotes a common center monitoring device for monitoring the operation of the governor body 2 at a plurality of locations. The center monitoring device 4 and the on-site processing device 3 at each data collection site are connected via a communication line 5. Connected to form a remote monitoring device. The communication line 5 applies a public line, a dedicated line, and a wireless line alone or in combination. The center monitoring device 4 and each on-site processing device 3 constitute communication means corresponding to these communication lines.

FIG. 2 is a schematic block diagram showing an example of the configuration of the on-site processing device 3 constituted by a microcomputer application device or the like. The on-site processing device 3 includes a monitoring data collection unit A and a non-volatile recording medium. Data recording means B to
And a data processing unit M comprising data abnormality monitoring means C
And a communication processing unit S with the center monitoring device 4. The communication processing unit S has a configuration in which a plurality of communication lines 5 with the center monitoring device 4 and a plurality of communication ports Pa and Pb connectable to these communication lines 5 are provided. That is, in this embodiment, there are two communication ports.
Also, each of the main processing unit M and the communication processing unit S has a CPU 6m,
6s.

Reference numeral 7a connected to the on-site processing apparatus 3 denotes a measuring instrument group such as an opening meter of the governor main body 2, pressure sensors on the primary and secondary sides of the governor main body 2, a flow meter, a gas detector and the like. These are configurations that output measurement data in an analog amount. Reference numeral 7b denotes a group of abnormality detection devices such as a governor cutoff detection sensor and an SI sensor abnormality detection sensor.
These are contact outputs.

The on-site processing apparatus 3 includes the above-described measuring equipment group 7a
And input means 8a and 8b for connecting the abnormality detection device group 7b to the input device 8b. That is, reference numeral 8a denotes measurement data input means, which comprises an analog pre-processing circuit, an A / D converter, a level converter, and the like, and has a function of converting analog data of each measurement device into a predetermined digital signal. It is configured so that Reference numeral 8b denotes an abnormality detection data input means, which comprises a level conversion circuit and the like.

The data converted into a predetermined digital signal by each of the data input means 8a and 8b is temporarily read into an appropriate storage area of the main processing unit M by the data reading means 9 for performing the subsequent processing. For example, data reading means 9
Can be constituted by a function of controlling the data input means 8a and 8b and intermittently transferring data to a predetermined temporary recording area such as a RAM every time, for example, every 0.5 second sampling time. . The monitoring data collection means A is configured by these configurations.

The data of the measuring instrument group 7a read by the data reading means 9 is either raw data, or is subjected to appropriate arithmetic processing or the like, and is carried out at predetermined time intervals by a portable medium such as an IC memory card via the recording medium reading / writing means 10. It is configured to record over time in the non-volatile recording medium 11 and record actual data for the period up to that time, for example, statistics of each item at each time, for example, data such as an average value and a standard deviation. The medium reading / writing means 10 constitutes the data recording means B.

The data recording capacity of the portable non-volatile recording medium 11 is, for example, one year of the above-mentioned data. When the recording period is exceeded, the oldest data is sequentially erased when sequentially recording new data. By doing so, it is possible to always hold data for a predetermined period from the present, that is, for one year. The data recording interval on the portable nonvolatile recording medium 11 is determined in consideration of the capacity of the portable nonvolatile recording medium 11 and the continuous recording period of data. The time is longer than the time, for example, every minute. Note that the recording interval can be made different for each data item.

Among the data intermittently read by the data reading means 9, the data of the measuring equipment group 7a is compared with set values such as upper and lower limits and actual data by the data processing means 12, and other calculations are performed. , An abnormality is determined, and as a result, an alarm is generated.

That is, the governor body 2 from the measuring instrument group 7a
The data such as the primary side pressure, the secondary side pressure, the opening degree of the governor body 2, the flow rate, the gas concentration, and the like are read by the data reading means 9 at every sampling time of 0.5 seconds, for example, as described above. The means 12 compares the set upper and lower limits set in advance and the actual data recorded in the portable nonvolatile recording medium 11 to monitor the abnormality. In addition, if necessary, a predetermined calculation such as a calculation of a data difference between adjacent sampling times, a pressure correction of a flow rate, or a time-based weighted averaging process of the data is performed. Is compared.

The abnormality processing means 13 monitors an alarm from the data processing means 12 and an abnormality detection output from the abnormality detection equipment group 7b obtained through the data reading means 9, and monitors the equipment group 7a,
In addition to the processing for the data abnormality of 7b, the processing for the equipment abnormality of the on-site processing device 3 itself such as the operation error of the data reading means 9 is performed. That is, the abnormality processing unit 13
When the data processing unit 12 issues an alarm, when the abnormality detection device group 7b issues an abnormality detection output, or when an operation error signal of the data reading unit 9 or the like is issued,
The abnormality handling process is performed according to a predetermined procedure. The abnormality handling process is an abnormality importance classification process, a process corresponding to the abnormality importance, an output to the communication management unit 17, and the like.

If it is determined that the data is abnormal as a result of the data abnormality determination, the data processing means 12 transmits the data to the abnormality processing means 1.
3, an alarm output is issued, and the relevant data is stored as progress data together with data before and after the data.
Record in 4. The progress data storage unit 14 is constituted by a nonvolatile storage unit such as an SRAM backed up by a battery. These data processing means 1
2. The abnormality processing unit 13 and the progress data storage unit 14 constitute the abnormality monitoring unit C.

The abnormality processing means 13 includes a data processing means 12
Warning of abnormalities regarding data from the computer and data reading means 9
Monitor the abnormality detection output from the abnormality detection device group 7b obtained through the interface and perform processing for the abnormality. That is, when the data processing unit 12 issues an alarm,
When the abnormality detection device group 7b issues an abnormality detection output,
The abnormality handling process is performed according to a predetermined procedure. The abnormality handling process includes an abnormality identification, an abnormality importance classification process, a process corresponding to the abnormality importance, an output to the communication processing unit S, and the like.

That is, when the data processing unit 12 issues an alarm, the abnormality processing unit 13 determines whether the abnormality is caused by a process or not based on the contents of the abnormal data.
Is determined to be abnormal. At this time, the abnormality processing unit 13 accesses the portable nonvolatile recording medium 11 via the recording medium read / write unit 10 as necessary depending on the content of the abnormality,
The abnormality data can be compared with past similar data recorded on the portable nonvolatile recording medium 11 to determine the abnormality. In addition, in the determination operation of such an abnormality, in addition to the abnormality data itself, the elapsed data temporarily recorded in the elapsed data storage unit 14 can be used.

The abnormality processing means 13 determines the abnormality as described above, and determines the content of the abnormality, for example,
Classification processing is performed into four degrees of importance, such as important, urgent, and urgent, and a request for notification to the center monitoring device 4 is output to the communication processing unit S according to the contents.

The communication processing unit M includes a communication management unit 15,
It comprises a communication port unit 16, a communication control unit 17 connected to the communication port unit 16, and a transmission / reception unit 18 controlled by the communication control unit 17. As communication ports for the communication line 5 with the center monitoring device 4, two communication ports Pa and Pb that can operate simultaneously are provided, and are connected to communication control means 17a and 17b, respectively. The communication control means 17a corresponds to the dedicated or wireless communication line 18 (5). The communication control means 17a is connected to the wireless communication device 20 via the dedicated / wireless line communication modem 19a, and the communication device control means 21 and the control output means 22 are connected. The configuration is such that activation control of the wireless communication device 20 is performed via the wireless communication device 20. The communication control means 17b corresponds to the public line 23, and is connected to the public line 23 via the public communication modem 19b. With the configuration described above, the communication processing unit S selects one or both of the two communication ports Pa and Pb, and as the communication line 5, either the dedicated / wireless communication line 18 or the public line 23, or Communication with the center monitoring device 4 can be performed by selecting a plurality of lines.

On the other hand, another communication port Pc is formed in the communication port section 16 and is connected to the modemless serial interface 19c via the communication control means 17c. The device 24 and other modems and the like are configured to be connectable.

As described above, in the configuration of FIG. 2, the two communication ports Pa and Pb are connected to the public line 23 and the dedicated / wireless line 18.
Thus, it is configured to connect to different communication lines of different types and perform simultaneous communication. However, another communication line of the same type, for example, two communication ports Pa and Pb are connected to different public lines, respectively. 23 and can communicate simultaneously. That is, FIG. 3 shows an example of this.
Public line communication control means 17b, 17b 'corresponding to two communication ports Pa, Pb, and public line modem 19b, 1
9b 'is connected to two public lines 23 via an exchange 25. A plurality of center monitoring devices 4, 4 ', 4 ",... Are connected to these public lines 23, and the communication processing unit S monitors the center of the communication partner with the selection of the communication port and the communication line. The device is configured to be selectable.

In the above configuration, as described above, when the abnormality processing unit 13 of the main processing unit M outputs a report request to the center monitoring device 4 to the communication management unit 15 of the communication processing unit S, the communication management unit 15 performs the following communication processing. S After selecting a communication line 5 corresponding to one or both of the two communication ports and calling the center monitoring device 4 and establishing a data link, occurrence of an abnormality is performed in a predetermined procedure. Etc. and transmit necessary data. S If a data link with the center monitoring device 4 is not established via the initially selected communication port and communication line, another data port and communication line are sequentially selected to establish a data link with the center monitoring device 4. Then, the communication processing of S is performed. Since a plurality of communication ports and communication lines are provided and a combination thereof, that is, a communication path is configured to be selectable, the probability that any of the communication paths becomes abnormal is extremely low. To center monitoring device 4
The notification of the abnormality to the communication path can be reliably performed, and the notification of the abnormality of the communication path can also be performed. In addition, since communication can be performed through different communication paths at the same time, an emergency notification can be quickly performed. S 'In the configuration in which the communication processing unit S can select the center monitoring device as the communication partner, if communication with a specific center monitoring device is not normally performed in S,
By sequentially selecting the center monitoring devices that make outgoing calls and performing the above-described communication processing, the probability that any of these combinations becomes abnormal is further reduced, and therefore, from the on-site processing device 3 to the center monitoring device 4 The reliability of the notification of the abnormality is further enhanced, and the failure to report the abnormality is almost eliminated. S When the normal communication processing is performed, that is, in the case of S, the fact is output to the abnormality processing unit 13 of the main body processing unit M. S When normal communication processing is not performed by the first selected communication port and normal communication processing is performed by another selected path, that is, in the case of S or S ′, the progress is determined by the abnormality of the main body processing unit M. Output to the processing means 13. S If a normal communication process has not been performed in any of the communication paths, the fact is output to the main processing unit M.

After outputting the report request, the main processing unit M monitors the operation of the communication processing unit S corresponding to the above-mentioned importance, and performs the following processing. For the response corresponding to MS, it is determined that the operation of the communication processing unit S is normal, and normal processing is continued as it is,
No special processing is performed. The response corresponding to MS is recorded as an abnormality relating to a specific communication path in the communication abnormality recording means 26 in the main processing unit M. The response corresponding to the MS is recorded as an abnormality relating to all the communication ports in the communication abnormality recording means 26. M: If there is no response from the communication processing unit S, the communication processing unit S records this fact in the communication abnormality recording unit 26 as an abnormality of the communication processing unit S itself.

On the other hand, the main body processing unit M periodically issues a response request to the communication processing unit S at appropriate intervals such as every day, every three days, every week, etc. , The response from the communication processing unit S is monitored. The communication processing unit S returns a predetermined response signal to the main processing unit M within a predetermined time in response to a response request from the main processing unit M. In this way, as long as there is no abnormality in the communication processing unit S, a response signal is returned to the main processing unit M. Therefore, the main processing unit can determine whether there is an abnormality in the communication processing unit S based on the presence or absence of a response signal to the response request. it can. That is, when there is no response to the response request, the main body processing unit M records the fact as an abnormality of the communication processing unit S itself in the communication abnormality recording unit 26 in the same manner as the step M. I do. The response request from the main body processing unit M to the communication processing unit S can be made by using a watchdog timer in addition to the communication between the respective CPUs.

As described above, the main processing unit M can detect the abnormality of the communication port in the communication processing unit S and the abnormality of the communication processing unit S at the time of a report request when the abnormality monitoring unit for data detects the abnormality. Abnormalities in the communication processing unit S itself can be detected even when a periodic response is requested, and these abnormalities can be recorded.

FIG. 4 is a block diagram showing a basic configuration of the center monitoring device. The center monitoring device 4 includes a communication processing unit D for communicating with a communication processing unit S of the on-site processing device 3, a monitoring unit 27, and a display unit. Means 28, alarm means 29, operation input means 30 and the like. The communication processing unit D includes, similarly to the on-site processing device 3, a dedicated / wireless communication control unit 32a corresponding to the wireless device 31, a dedicated / wireless communication modem 33a, and a dedicated / wireless communication modem corresponding to the public line 23. Line communication control means 32b, public communication modem 33
b.

In the above configuration, when an abnormality to be reported to the center monitoring device 4 occurs in the equipment of the governor room 1 corresponding to each on-site processing device 3 and this is detected in the main body processing section M, As described above, the communication processing unit S ensures that the center monitoring device 4 can be reliably connected via any of a number of communication paths.
The data of the content of the abnormality is transmitted.

In the center monitoring device 4, the monitoring means 27 displays the data of the contents of the abnormality transmitted from the on-site processing apparatus 3 on the display means 28 and, if necessary, an alarm means 29.
Generates an alarm. Therefore, the center monitoring device 4 can detect the occurrence of the abnormality and the content thereof without processing the raw data of the equipment at the data collection site, and can take quick action.

On the other hand, the center monitoring device 4 periodically calls each on-site processing device 3 at appropriate intervals, for example, every day, every three days, every week, and the like. By reading the communication error record by accessing the communication error recording means 26 of M, it is possible to grasp the abnormality of the communication port, the communication line, etc. in each local processing device 3, and to make it impossible to access or to perform the communication processing. In the case of an abnormality, a predetermined measure can be taken by detecting an abnormality of the communication processing unit S itself.

[0036]

As described above, according to the present invention, each on-site processing device determines an abnormality of monitored data and transmits predetermined data to the center monitoring device via the communication processing unit. The effect is as follows. Eliminating the collection operation every short period as in the on-site recording paper system is unnecessary. The data can be processed directly by computer without performing the necessary input work in the case of the on-site recording paper system. The processing load on the center monitoring device is small, and neither the hardware nor the software is enormous. Since the operation in the center monitoring device is simple, a skilled person is not required. By recording performance data on a portable non-volatile recording medium and using it as data for judging abnormality of measured data, abnormality of a sensor such as a measuring device can be detected. In the communication processing unit of each field processing device, a plurality of communication ports and a plurality of communication lines are provided, and they can be selected and connected simultaneously if necessary, so that a large number of possible communication paths are configured, Therefore, even if any one of them is abnormal, it is possible to notify the center monitoring device via another communication path, so that the reliability of monitoring by communication can be greatly improved, and the center monitoring device can grasp the abnormality related to the communication port in real time. Yes, prompt response, including repair requests, is possible. Such an effect becomes more remarkable by configuring the center monitoring device as a communication partner to be selectable. An abnormality in the communication processing unit itself can be detected by a periodic response request from the main body processing unit of the on-site processing device and the center monitoring device, and it is possible to prevent a state in which remote monitoring cannot be continued due to the abnormality. Details of communication errors can be grasped by the communication error recording means configured in the main unit processing section, and it is easy to determine whether the communication processing section itself is abnormal or the communication port is abnormal. , Accurate and prompt response.

[Brief description of the drawings]

FIG. 1 is a block diagram schematically showing an overall configuration of the present invention.

FIG. 2 is a block diagram illustrating an example of a basic configuration of a field processing apparatus according to the present invention.

FIG. 3 is a schematic diagram illustrating an example of another configuration of the communication processing unit of the on-site processing apparatus according to the present invention.

FIG. 4 is a block diagram showing an example of a basic configuration of a center monitoring device according to the present invention.

[Explanation of symbols]

A monitoring data collecting means B data recording means C abnormality monitoring means M main body processing section S communication processing section D communication processing section 1 (1a, 1b, ..., 1n) governor room 2 governor main body 3 field processing device 4 center monitoring device 5 Communication line 6a, 6b CPU 7a Measuring equipment group 7b Abnormality detecting equipment group 8a Measurement data input means 8b Abnormality detection data input means 9 Data reading means 10 Recording medium reading / writing means 11 Portable non-volatile recording medium 12 Data processing means 13 Abnormality processing means 14 Progress data storage means 15 Communication management means 16 Communication port section 17a, 32a Dedicated / wireless line communication control means 17b, 32b Public line communication control means 17c Serial communication communication control means 18 Dedicated / wireless communication lines 19a, 33a Dedicated・ Communication modem for wireless line 19b, 33b Public communication modem 19c Modemless ・Real interface 20 wireless communication device 21 the communication device control means 22 controls the output unit 23 the public line 24 Allowed 搬端 end device 25 exchanges 26 communication abnormality recording means 27 control means 28 display means 29 alarm means 30 operation input means 31 wireless device

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification code FI G08C 19/00 G08C 25/00 F 25/00 17/00 Z

Claims (4)

(57) [Claims] An on-site processing device is installed at a data collection site, and a common center monitoring device is connected to a number of on-site processing devices via a communication line.
The main processing unit includes a monitoring data collection unit, a data recording unit on a non-volatile recording medium, and a data abnormality monitoring unit, and a communication processing unit with a center monitoring device. A plurality of communication lines with the monitoring device and a plurality of communication ports that can be connected to these communication lines and that can operate at the same time are provided. A function of requesting a communication unit to report to the center monitoring device, a function of recording a communication abnormality in response to a response of the communication processing unit to the request, and a function of periodically requesting a response from the communication means. The unit has a function of selecting a communicable communication port and communication line to notify the center monitoring device in response to a request from the main processing unit, and a function of returning a response corresponding to the result to the main processing unit. And And center monitoring device remote monitoring device, characterized in that to constitute a function of reading a communication abnormality record by calling a regular field processing apparatus to 2. The remote monitoring device according to claim 1, wherein the communication processing unit of the on-site processing device has a function of selecting a center monitoring device installed at a plurality of locations in addition to a communication port and a communication line. 3. The remote monitoring device according to claim 1, wherein the periodic response request from the main processing unit to the communication processing unit is performed by communication between CPUs. 4. The remote monitoring apparatus according to claim 1, wherein a request for a periodic response from the main processing unit to the communication processing unit is made by a watchdog timer.