JP5122317B2 - Wireless communication system and power supply monitoring control system using the same - Google Patents

Description

  The present invention relates to a wireless communication system that can be used for meter reading of electricity, gas, water, and the like, and a power supply monitoring control system using the wireless communication system.

  A typical prior art of a wireless communication system used for meter reading of the electricity, gas, water and the like is disclosed in Patent Document 1. In this conventional technology, meter reading data is collected and integrated into a higher-level terminal station (wireless communication device), and further transferred to the higher-level side, so the base management device polls each terminal station individually. Compared with, data can be collected in a short time.

  By the way, when performing settings related to installation or updating of such terminal stations, or when the meter reading data cannot be raised due to a network failure and the operator sucks the meter reading data from an isolated terminal station, it is dedicated The tool needs to communicate directly with the terminal. Here, in such a case, it is conceivable to perform data communication by directly connecting a cable between the terminal station and the dedicated tool, but remove the cover of the terminal station installed in the gap or high place with the neighboring house. Connecting the cable is very complicated. In particular, when a terminal station on the upper side of the network breaks down, it is necessary to suck up meter reading data from many terminal stations, which is extremely complicated. In addition, in such a terminal station installed outdoors, the reliability of connection due to terminal contamination due to aging becomes a problem.

Therefore, in Patent Document 2, in the cordless telephone, the telephone number of the called party is stored in the ROM of the base unit with the group name and the identification information of the called party corresponding to the group name is stored. It has been proposed to switch the device to be ringed according to which group, that is, who in the family the incoming call is directed to.
JP 2000-187793 A Japanese Patent No. 3911887

  Therefore, by using the above-mentioned Patent Document 2 as Patent Document 1, it is possible to substantially set identification information (telephone number) of a terminal station that performs automatic meter reading. However, since the setting is performed on the base unit side and Patent Document 2 is a cordless telephone for home use as described above, there are few problems at that time, but the terminal station that performs automatic meter reading is identified separately. When changing to information (telephone number), it is necessary to give a change instruction from the management apparatus side, and the work is very complicated. Further, when the non-delivery meter reading data at the time of a network failure is taken up, it is not possible to access from the management device side, and it is necessary to specify and access the terminal identification information (telephone number) from the dedicated tool. However, when PHS is used for wireless communication, the telephone number in the transceiver mode changes dynamically, and there is a problem that the telephone number is not known even if the operator looks at the terminal station on the site, and cannot be accessed.

  An object of the present invention is to provide a wireless communication system capable of easily communicating even if the original identification information (telephone number) is not known at the location where each terminal station is installed, and a power supply monitoring control system using the wireless communication system. That is.

The wireless communication system of the present invention includes a plurality of wireless communication devices, each wireless communication device stores first identification information having a predetermined number of bits, and the received identification information is the first identification information. In the wireless communication system that enables wireless communication of messages with other wireless communication devices, the wireless communication devices are preliminarily defined based on unique data attached to the airframe. The second identification information consisting of the predetermined number of bits, and the third identification information consisting of the unique data having a number of bits larger than the predetermined number of bits , Is further stored, the desired wireless communication device is called with the second identification information, the third identification information is obtained by communicating the message with the called wireless communication device, If the identification information coincides with the third identification information in a wireless communication device to the desired, characterized in that it comprises a dedicated tool for performing wireless communication of subsequent messages.

  According to the above configuration, each wireless communication device is configured with first identification information that is configured with a predetermined number of bits such as a telephone number and is individually called, and designates the first identification information. Thus, in the wireless communication system that enables wireless communication of messages, second (back) telephone number is set, and second identification information having a predetermined number of bits is set. Further, the second identification information is a number that can be uniquely derived by a predetermined calculation method based on the unique data attached to the aircraft, and is set in combination with the second identification information. The third identification information composed of the unique data is set.

  When communicating with the dedicated tool, first, the second identification information is called, and the third identification information is added and exchanged in the message. Make it possible.

  Therefore, when a call is made for setting or the like to a wireless communication apparatus to be exchanged or newly installed in a network composed of many wireless communication apparatuses, the first identification information of the wireless communication apparatus is not known. Even in this case, the worker can make a call by calculating the second identification information from a known calculation method based on the unique data attached to the aircraft, and the number of bits is specified. Even if there is a wireless communication device that coincides with the second identification information by chance, only the desired wireless communication device can be individually designated by the third identification information. Thus, communication can be easily performed without knowing the original identification information (telephone number) at the location where each wireless communication device is installed, and data exceeding the original number of bits of the identification information (telephone number). The desired wireless communication device can be accurately specified by the amount. Thereby, a wireless communication system suitable for remote meter reading can be realized.

The wireless communication system of the present invention comprises a plurality of wireless communication devices, each wireless communication device stores first identification information of a predetermined number of bits, received identification information is the first In the wireless communication system that enables wireless communication of messages with other wireless communication devices by matching with the identification information of the wireless communication device, each wireless communication device is based on unique data attached to the airframe. The second identification information consisting of the predetermined number of bits and the third identification information consisting of the specific data are further stored, and the first identification information is further stored. The wireless communication device is called with the identification information of 2 and the third identification information is acquired by communicating the message with the called wireless communication device. Nothing to do When matching the in the communication device third identification information, a dedicated tool for performing wireless communication of subsequent messages, the wireless communication device, a call by the second identification information from said special tool is performed, When a message is communicated and the third identification information in the message is different from the third identification information of the own device, a connection rejection signal is transmitted to the dedicated tool, and a call from the dedicated tool is performed for a predetermined time. It is characterized by pausing the response to (silenced).

  According to the above configuration, the wireless communication device is called from the dedicated tool with the second identification information, responds when the second identification information matches, further communicates a message, If it is determined from the third identification information that the dedicated tool is not a wireless communication device that desires connection, a connection rejection signal is transmitted to the dedicated tool, and the response to the call is suspended (silently) for a predetermined time.

  Therefore, it is possible to avoid a situation in which the response from the wireless communication device having the same second identification information is complicated, and the response from the desired wireless communication device does not reach the end.

  Furthermore, in the wireless communication system of the present invention, when the wireless communication device receives a call that matches the second identification information, the wireless communication device responds with a delay by a timing based on the unique data. And

  According to the above configuration, when there are a plurality of wireless communication devices that match the second identification information, the responses from the wireless communication devices with respect to the call are shifted so as not to collide with each other in order. Communicate with the device.

  Therefore, the desired wireless communication device can be found reliably and promptly.

  In the wireless communication system of the present invention, each of the wireless communication apparatuses and the dedicated tool communicates in a PHS transceiver mode.

  According to the above configuration, in the PHS transceiver mode, the PS call number serving as the identification information of the individual 13-bit wireless communication device among the 42-bit incoming identification code for calling the communication partner advanced station is dynamically changed according to the network state. If the calculation method is known and does not change as in the present invention, the second and third identification information (back phone number) that can be seen from the outside is used. Thus, the desired wireless communication device can be easily specified, which is preferable.

  In the PHS transceiver mode, the PS call number serving as the identification information of the individual wireless communication device is 13 bits among the 42-bit incoming call identification code for calling the communication partner advanced station as described above, that is, the number of accommodation is only 8192. Therefore, in the second identification information, only 8192 wireless communication devices can be individually specified, but the third identification information is used to accurately specify the desired wireless communication device. Can do.

  Furthermore, the wireless communication system of the present invention includes a management device that manages a network, and a plurality of wireless communication devices are arranged in a tree shape. One wireless communication device uses the first identification information to generate another wireless communication device. By communicating with the communication device, data to be transmitted / received by each wireless communication device is relayed by the wireless communication device higher than the own device and transmitted / received to / from the management device.

  According to said structure, the radio | wireless communications system which can comprise a network from a management apparatus in tree shape, and can perform data collection and data distribution is realizable.

  Preferably, the data transmitted from each wireless communication device to the management device is sensing data collected by each wireless communication device, and the data transmitted from the management device to each wireless communication device is control data for each wireless communication device. It is characterized by being.

  The power supply monitoring and control system according to the present invention includes a watt-hour meter that acquires the sensing data and a load switch that performs switching control in response to the control data in each wireless communication device. It is characterized by being made.

  According to the above configuration, the management device holds a route table that indicates how the wireless communication devices are arranged, periodically acquires watt-hour meter sensing data from each wireless communication device, and The load switch can be controlled via each wireless communication device as necessary.

  Therefore, it is possible to collect power consumption by time of day and power outages due to moving in and out remotely at power company sales offices, etc. without the workers having to go directly to contracted homes or offices. . As a result, it is possible to adopt a detailed fee system, or to quickly charge or power outage, and to improve customer service in the power company.

  As described above, the wireless communication system of the present invention is configured such that each wireless communication device includes a predetermined number of bits such as a telephone number, and first identification information for individually calling is set. In a wireless communication system that enables wireless communication of a message by designating information, another (back) telephone number is set and second identification information consisting of a predetermined number of bits is set. The identification information of 2 is a number that can be uniquely derived by a predetermined calculation method based on the unique data attached to the airframe, and in combination with the second identification information, the unique identification information Third identification information composed of data is set.

  Therefore, when making a call for setting to a wireless communication device to be exchanged or newly installed in a network composed of many wireless communication devices, the first identification information of the wireless communication device is known. Even if not, the operator can make a call by calculating the second identification information from a known calculation method based on the unique data attached to the aircraft, and the number of bits specified Even if there is a wireless communication device that coincides with the second identification information by chance, only the desired wireless communication device can be individually designated by the third identification information. Thus, communication can be easily performed without knowing the original identification information (telephone number) at the location where each wireless communication device is installed, and data exceeding the original number of bits of the identification information (telephone number). The desired wireless communication device can be accurately specified by the amount. Thereby, a wireless communication system suitable for remote meter reading can be realized.

  Furthermore, as described above, the power supply monitoring and control system according to the present invention includes, in the above-described wireless communication system, a power meter that acquires sensing data and a load that performs opening / closing control in response to the control data in each wireless communication device. Constructed with a switch.

  Therefore, it is possible to collect power consumption by time of day and to perform power outages due to moving in and out remotely at power company sales offices, etc. without going directly to contract homes or offices. it can. As a result, it is possible to adopt a detailed fee system, or to quickly charge or power outage, and to improve customer service in the power company.

[Embodiment 1]
FIG. 1 is a block diagram showing an overall configuration of a power supply monitoring control system according to an embodiment of the present invention. The power supply monitoring and control system includes a server device 1 installed at a power company sales office and the like, and one or a plurality of gateways GWa and GWb connected to the server device 1 via a communication line 2 such as an in-house optical fiber network. , GWc,... (Generally indicated by reference numeral GW) and unit power meters T1-1, T1-2, T1-3,. The unit power meters T1-1, T1-2, T1-3,...; T2-1, T2-2,. T3-2,... (Generally referred to as reference symbol T below).

  Each unit wattmeter T is similar to the structure previously proposed by the applicant of the present invention in Japanese Patent Laid-Open No. 2006-292442 and Japanese Patent Laid-Open No. 2006-170787, and is configured as shown in FIG. . That is, the load switch 3, the watt-hour meter 4, and the wireless communication device 5 are arranged from the terminal block 6 side to which each distribution line in the house is connected. The watt-hour meter 4 reads the accumulated power amount every predetermined period, for example, every 30 minutes, and the meter-reading data as sensing data is set to a timing preset by each unit watt meter T by the wireless communication device 5. , Transmitted to the gateway GW to which the own device belongs, and is collected and input to the server device 1. On the other hand, control data for performing opening / closing of the load switch 3 or backup meter reading for retransmitting non-delivery meter reading data is transmitted from the server device 1 via the gateway GW as needed. Sent to

  The server device 1 holds a route table as shown in FIG. 1 showing how the unit wattmeters T are arranged. As described above, the server device 1 periodically receives data from the built-in wireless communication devices 5. In addition, the meter reading data of the watt-hour meter 4 can be acquired, and the load switch 3 can be controlled via each wireless communication device 5 as necessary. In addition, a power outage associated with moving in and out can be performed remotely at a power company sales office or the like, without the operator having to go directly to the contracted home or office. As a result, it is possible to adopt a detailed fee structure, to promptly perform billing and power failure, and to improve customer service in the power company.

  In each unit power meter T, in the prior art of Patent Document 1, a type-wired communication device that draws a communication signal line from a utility pole or the like is used for the portion of the wireless communication device 5. Then, using a device that performs wireless communication in a PHS (Personal Handyphone System) transceiver mode, a communication operation is performed as follows. In the PHS transceiver mode, when the line of sight is visible, communication is possible within a radius of 150 to 200 m, and each wireless communication device 5 communicates not only with the adjacent wireless communication device but also directly with the gateway GW in some cases. Is also possible.

  FIG. 3 is a block diagram illustrating a configuration example of the wireless communication device 5. The wireless communication device 5 stores the PHS wireless device 11 as wireless communication means, a wireless communication control unit 12 as control means for controlling the communication, a timer 13, and parameters necessary for communication. Memory 14 as storage means, input operation unit 15 that can set a part of the contents of the memory 14, an interface 21 that receives meter reading data from the watt-hour meter 4, and control to the load switch 3 An interface 22 for transmitting data, an in-machine communication control unit 23 for controlling communication with the watt-hour meter 4 and the load switch 3, a memory 24 for storing the meter-reading data in backup, the meter-reading data and When transmitting / receiving control data from / to the wireless device 11, a data processing unit 25 for performing merge / divide processing as will be described later, and a data processing unit used for the data processing. Constructed and a king memory 26.

  On the other hand, FIG. 4 is a block diagram illustrating a configuration example of the server apparatus 1 that is a management apparatus. The server device 1 collects meter reading data from the input operation unit 51 and the watt hour meter 4 of each unit watt meter T serving as a terminal station, and also controls a unit control unit 52 that controls the load switch 3, A database 53 storing the load control status, a network management unit 56 and a database 54 for managing the status related to each unit power meter T, and connected to the communication line 2 to communicate with each unit power meter T from the gateway GW. And an interface 57 for performing the above.

  The gateway GW replaces the in-machine communication control unit 23, the interfaces 21, 22 and the data memory 24 for controlling communication with the watt hour meter 4 and the load switch 3 in the configuration of the wireless communication device 5 shown in FIG. The communication control unit configured to communicate with the communication line 2 and an interface are configured.

  In the power supply monitoring and control system configured as described above, each wireless communication device 5 is set from the input operation unit 15 and has its own telephone number # 01 and transfers the meter reading data to the memory 14. Phone number # 11 of a higher-level partner (calling) destination. The telephone number # 11 is the telephone number of the unit power meter adjacent to the own device according to the hierarchy of the route table. Specifically, in the example of FIG. 1, unit power meters T1-1, T1-2, T1-3, T1-4, T1-5, which are the lowest terminal stations; T1-11, T1-12 (generic name) In this case, the telephone number # 01 is a-300, a-310, a-320, a-330, a-340; b-300, b-310, respectively. , Registered in advance from the input operation unit 15. The telephone numbers # 11 include unit power meters T2-2, T2-4, T2-6, T2-8, T2-10; a-120, a-140, a-160, a-180, a-200; b-120, b-140 are registered in advance.

  In the wireless communication apparatus 5 configured as described above, the wireless communication control unit 12 inputs the meter reading data from the lower side received by the wireless device 11 to the data processing unit 25. On the other hand, the data processing unit 25 receives in advance the meter reading data from the watt hour meter 4 of the own device which is received by the in-machine communication control unit 23 via the interface 21 and stored in the data memory 24. The data is read every transmission cycle, for example, every 30 minutes. Then, the data processing unit 25 uses the working memory 26 to perform processing for merging the input data, and creates new meter reading data.

  In the new meter-reading data, the radio communication control unit 12 is added with its own telephone number stored in the telephone number # 01 of the memory 14, for example, b-80 in the unit power meter T3-12. Thereafter, at the timing specified by the timer 13, the telephone number of the higher-order wireless communication apparatus adjacent to the own apparatus stored in the telephone number # 11 is transmitted from the wireless apparatus 11, for example, the unit power meter T3-12. The unit power meter T4-11 b-30 is called to transmit.

  Thus, when the own device becomes a relay station and transfers data, the wireless communication control unit 12 merges the meter reading data from the lower side with the meter reading data from the lower side and transfers it to the upper side. However, the data length becomes longer as it becomes the base station (upper side) side, but the traffic can be greatly reduced as compared with the case where each wireless communication device individually transmits data to the base station. . If the own device is a terminal station, there is no meter reading data transferred, so that the wireless device 11 does not receive the data, and the data processing unit 25 does not merge the meter reading data. The meter reading data from is sent as it is. In the server device 1, the unit controller 52 receives the meter reading data from the interface 57, divides the merged data, and stores it in the database 53 for each customer.

  The data stored in the memory 24 is data of accumulated electric power measured by the watt-hour meter 4 at 0 and 30 minutes per hour as indicated by reference numeral 24a in FIG. Information may be stored together, and the storage capacity is selected to be a capacity capable of accumulating meter reading data for, for example, 40 days. The database 53 on the server device 1 side stores meter reading data for each customer, load control status, power failure status, and the like for a longer period.

  On the other hand, the control data for controlling the load switch 3 of each consumer at a predetermined time includes all the telephone numbers of wireless communication devices to be routed in the header according to the route table. The wireless communication control unit 12 analyzes the control data received from the unit control unit 52 and sends the call to the telephone number of the wireless communication device to be transmitted next. For example, the control data from the server device 1 relayed by the unit power meter T4-11 is, for example, T3 according to the data among the unit power meters T3-11 and T3-12 of the next layer at an arbitrary timing. Will be transferred to -12. At this time, the control data received by the wireless device 11 is input from the wireless communication control unit 12 to the data processing unit 25, and the control data addressed to the own device is divided using the working memory 26.

  In this way, by dividing the control data that should be received from the control data from the upper side and transferring it to the lower side, the data length becomes longer toward the base station (upper side). Compared to the case where the terminal station individually transmits data to each wireless communication device, the traffic can be greatly reduced. If the own device is a terminal station, since there is no control data to be transferred, transmission by the wireless device 11 is not performed, and control data is not divided by the data processing unit 25. In FIG. 1, in the tree on the gateway GWa side, an arrow having a thickness corresponding to the amount of data is shown in order to easily show the merging of meter reading data and the division of control data.

  In this way, it is possible to regularly collect meter reading data and distribute control data regularly and in a short time. Further, the memory 14 of each wireless communication device 5 only stores the telephone number # 11 of the adjacent higher-order wireless communication device, and does not have to include the route table for the entire tree, and has a storage capacity. It can be made smaller and the route can be easily changed.

  In the power supply monitoring and control system configured as described above, it should be noted that in the present invention, each wireless communication device 5 is used in a normal state and maintenance is performed in addition to the telephone number # 01 which is the first identification information. Sometimes it has another phone number which is the second identification information. The other (back) telephone number is a number that can be uniquely derived by a predetermined calculation method based on unique data attached to the aircraft, such as a manufacturing nameplate. In this form, the last four digits of the serial number of the unit power meter T are stored in the memory 14 as the sub telephone number # 02. Also noteworthy is the third identification information associated with the second identification information, and in the present embodiment, the serial number itself is stored in the memory 14 as the additional telephone number # 03. . The secondary telephone number # 02 and the additional telephone number # 03 are set as a set from the input operation unit 15, or set in advance by a manufacturer or the like.

  Here, in the PHS transceiver mode, of the 42-bit incoming call identification code for calling the communication partner tip station, the PS call number serving as the identification information of the individual terminal station is 13 bits, and the 13 bits are the sub-phone number # 02. Become. Therefore, the radio communication control unit 12 does not transmit the additional telephone number # 03 as the telephone number at the time of the call, but adds it to the message transmitted after the line is established by the sub telephone number # 02. To do. Then, the wireless communication control unit 12 enables subsequent message wireless communication when the additional telephone number # 03 matches.

  The secondary telephone number # 02 and the additional telephone number # 03 are used for the maintenance such as when the unit power meter T is replaced or newly set up or when the meter reading data is taken up from the unit power meter T isolated due to a network failure. And used for calling by the dedicated tool 10. For example, in the example of FIG. 1, as the sub telephone number # 02, terminal unit power meters T1-1, T1-2, T1-3, T1-4, T1-5; f-301, e-311, d-321, c-331, b-341; a-301, g-311 are registered.

  FIG. 5 is a diagram for explaining an operation at the time of setting accompanying replacement or new installation of the unit power meter T. FIG. 5 shows an example in which, in addition to the unit power meter C to be set (target), two unit power meters A and B exist in the communication range with the dedicated tool 10. Yes. The serial numbers of the unit power meters A, B, and C, that is, the additional telephone number # 03 are individually “12345678112”, “12345678111”, and “12345668111”, and the PS call number, that is, the sub telephone number # 02 is the last four digits, “8112”, “8111”, and “8111”, which are the same between the unit power meters B and C.

  Therefore, when the dedicated tool 10 makes a call to the unit power meter C with the sub phone number # 02 “8111”, the unit power meter B having the same sub phone number # 02 of “8111” is also addressed to the own device. Recognize communication and synchronize with the transmission signal. Thereafter, the unit wattmeters B and C establish a call by the normal PHS-TR operation, and the communication operation is started. As a result, the operation moves to a maintenance-dedicated operation, and the dedicated tool 10 requests the additional telephone number # 03, that is, the serial number, activates the timer 13, and waits for a response for a predetermined time.

  In the example of FIG. 5, before the timer 13 times out, there is a response from the unit power meter B which is not the purpose first, and the response from the target unit power meter C is not reached due to the collision. However, the response from the unintended unit power meter B is a connection rejection signal NACK indicating that the serial number does not match that of the own device. When receiving this connection rejection signal NACK, the dedicated tool 10 once disconnects the call. The unit power meter B that has transmitted the connection refusal signal NACK activates the timer 13 and pauses the response to the call for a predetermined time (silently).

  Then, in the next transmission frame, the dedicated tool 10 similarly makes a call to the unit power meter C with “8111” of the sub telephone number # 02. At this time, the unit power meter B is counting the connection refusal timer and does not respond to the call (ignore), so only the response of the unit power meter C is received by the dedicated tool 10. As a result, a call between the target unit power meter C and the dedicated tool 10 is established, and the dedicated tool 10 requests the additional telephone number # 03, that is, the serial number by a message. If there is a response from the unit wattmeter C by the time-out time of the timer 13 and the serial number matches the value of the target unit wattmeter C, the dedicated tool 10 will send a contract number or initial telephone number in a subsequent message. Numbers # 01 and # 11 are set. The reading of meter reading data when the terminal station is isolated due to a network failure is also performed by the dedicated tool 10 in the same procedure as described above using a PHS communication line.

  As described above, in addition to the normally used telephone number # 01, the sub telephone number # 02 that can be uniquely derived by a predetermined calculation method based on the unique data attached to the aircraft for maintenance. In addition, by using the additional telephone number # 03 to supplement it, a call is made for setting or the like in the unit wattmeter to be replaced or newly installed in the network composed of many unit wattmeters T In this case, even when the telephone number # 01 of the unit power meter is not known, the operator calculates the telephone number # 02 from a known calculation method based on the unique data attached to the aircraft, and makes a call. Even if there is a unit power meter that coincides with the sub-phone number # 02 specified in the number of bits near by chance, the additional phone number # 03 Desired a unit power meter which only can be specified individually. Thus, communication can be easily performed without knowing the original telephone number # 01 at the location where each unit power meter T is installed, and with a data amount exceeding the original number of bits of the telephone number # 01, The desired unit power meter can be specified accurately (can be specified exceeding the 13-bit terminal station capacity of 8192). In addition, meter reading data can be transmitted promptly.

  Further, the wireless communication devices 5 of the unit power meters B and C are called from the dedicated tool 10 with the sub telephone number # 02, and when the sub telephone number # 02 matches, a response is made and further a message is communicated. Then, when it is determined from the additional telephone number # 03 that the dedicated tool 10 is not a wireless communication apparatus that desires connection, a connection rejection signal NACK is transmitted to the dedicated tool 10 and the response to the call is suspended for a predetermined time. (Silenced). The dedicated tool 10 that has received the connection rejection signal NACK stops calling the wireless communication device and calls another wireless communication device. This avoids a situation in which the responses from the unit power meters B and C having the same sub-phone number # 02 are complicated and do not reach the desired response from the unit power meter C. Can do.

[Embodiment 2]
6 and 7 are diagrams for explaining a communication operation at the time of maintenance in the power feeding monitoring control system according to another embodiment of the present invention. In the present embodiment, the configuration shown in FIGS. 1 to 4 described above can be used, and only part of the operation timing in the wireless communication control unit 12 is different as follows. In the operation of FIG. 5 described above, there is a difference in the responses of the two unit power meters B and C, and the dedicated tool 10 can receive the response of the additional telephone number # 03 (serial number) from the unit power meter B. When there is not much deviation as shown in FIG. 6, the response signals collide. Specifically, in the example of FIG. 6, the unit wattmeter B that responds first because the distance from the dedicated tool 10 is short or the like is changed within a predetermined incoming monitoring period W1 from the start time t1 of the previous frame. Is not detected and the unit power meter C that responds by sending a little because the distance is long when the response starts from the next frame from the time t2 is also transmitted as a result of the carrier sense. If no carrier is detected in W1 and a response is made from the next frame from time t3, response signals collide in subsequent frames.

  Therefore, in the present embodiment, as shown in FIG. 7, each unit power meter T responds with a delay by a timing W2 based on the serial number, which is unique data. In the example of FIG. 7, for simplification of the drawing, the unit wattmeter B has W2 = 0, and the unit wattmeter C has a period of approximately 4 frames. Therefore, the unit power meter C that has been waiting for the timing W2 reliably detects the response from the unit power meter B by carrier sense and does not perform the response.

  With this configuration, when there are a plurality of unit power meters T that match the sub-phone number # 02, the responses from the unit power meters T to the call are shifted so as not to collide with each other. Communication with the tool 10 can be performed, and the desired unit power meter C can be found reliably and promptly.

  In the above-described embodiment, an example in which the management device includes the server device 1 and the gateway GW is shown. This is an example of a management device, and may be a management device including a plurality of server devices, a management device that does not use the gateway GW, or the like. Moreover, although PHS was illustrated as a radio | wireless communication system between each unit power meter T which is a terminal station, another radio | wireless communication system is also employable. For example, the present invention can be applied to a server and a client constituting a wireless LAN. Furthermore, in the said embodiment, each unit power meter T which is a terminal station showed the example connected to the network in the tree form provided with the several hierarchy. Instead of this, each unit power meter T may be individually connected to the server apparatus 1. Furthermore, the data transmitted from each unit power meter T to the server device 1 may be other data such as voltage data.

1 is a block diagram showing an overall configuration of a power supply monitoring control system according to an embodiment of the present invention. It is a front view which shows one structural example of the unit wattmeter used for the said electric power feeding monitoring control system. It is a block diagram which shows one structural example of the radio | wireless communication apparatus in the said unit power meter. It is a block diagram which shows the example of 1 structure of a server apparatus. It is a figure for demonstrating the communication operation at the time of the maintenance in the electric power feeding monitoring control system which concerns on one Embodiment of this invention. It is a figure for demonstrating the communication operation at the time of the maintenance in the electric power feeding monitoring control system which concerns on the other embodiment of this invention. It is a figure for demonstrating the communication operation at the time of the maintenance in the electric power feeding monitoring control system which concerns on the other embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Server apparatus 2 Communication line 3 Load switch 4 Electricity meter 5 Wireless communication apparatus 6 Terminal block 10 Dedicated tool 11 Radio | wireless machine 12 Wireless communication control part 13 Timer 14, 24 Memory 15, 51 Input operation part 21, 22, 57 Face 23 In-machine communication control unit 24 Data memory 25 Data processing unit 26 Working memory 52 Unit control unit 53, 54 Database 56 Network management unit T1-1 to T1-5, T1-11, T1-12 Unit power meter T2-1 T2-10, T2-11 to T2-14 Unit power meter T3-1 to T3-5, T3-11, T3-12 Unit power meter T4-1 to T4-4, T4-11, T4-12 Unit power meter T5-1, T5-2, T5-11, T5-12 Unit power meter GWa, GWb, GWc, ... Gateway

Claims (7)

A plurality of wireless communication devices, each wireless communication device stores first identification information of a predetermined number of bits, and the received identification information matches the first identification information, In a wireless communication system that enables wireless communication of messages with a wireless communication device,
Each wireless communication device can be uniquely derived by a predetermined calculation method based on unique data attached to the airframe, and includes second identification information composed of the predetermined number of bits, Third identification information comprising the unique data having a number of bits greater than the predetermined number of bits is further stored,
Calling a desired wireless communication device with the second identification information, and communicating the message with the called wireless communication device to obtain the third identification information, wherein the third identification information is A wireless communication system comprising a dedicated tool for performing wireless communication of subsequent messages when the third identification information coincides with a desired wireless communication device. A plurality of wireless communication devices, each wireless communication device stores first identification information of a predetermined number of bits, and the received identification information matches the first identification information, In a wireless communication system that enables wireless communication of messages with a wireless communication device,
Each wireless communication device can be uniquely derived by a predetermined calculation method based on unique data attached to the airframe, and includes second identification information composed of the predetermined number of bits, Third identification information comprising the unique data is further stored,
Calling a desired wireless communication device with the second identification information, and communicating the message with the called wireless communication device to obtain the third identification information, wherein the third identification information is A dedicated tool for performing wireless communication of subsequent messages when the third identification information in the desired wireless communication device matches,
The wireless communication device is called from the dedicated tool with the second identification information, communicates a message, and the third identification information in the message is different from the third identification information of the own device. sends a connection rejection signal to the dedicated tool, a predetermined time, radio communications systems that characterized by resting a response to a call from the special tool.   3. The wireless communication according to claim 1, wherein, when receiving a call that matches the second identification information, the wireless communication apparatus responds with a delay by a timing based on the unique data. system.   The wireless communication system according to any one of claims 1 to 3, wherein each of the wireless communication devices and the dedicated tool performs communication in a PHS transceiver mode.   A plurality of wireless communication devices are arranged in a tree shape from a management device that manages a network, and each wireless communication device communicates with another wireless communication device using the first identification information, thereby allowing each wireless communication device to 5. The data according to claim 1, wherein data to be transmitted / received by the communication device is relayed by the wireless communication device on the higher side than the own device and transmitted / received to / from the management device. Wireless communication system.   The data transmitted from each wireless communication device to the management device is sensing data collected by each wireless communication device, and the data transmitted from the management device to each wireless communication device is control data for each wireless communication device. The wireless communication system according to claim 5.   7. The wireless communication system according to claim 6, wherein each wireless communication device is provided with a watt-hour meter that acquires the sensing data and a load switch that performs switching control in response to the control data. Power supply monitoring and control system.

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