JP5162356B2 - Specific low-power radio telemeter system - Google Patents

Description

  The present invention relates to a radio telemeter system that conforms to the standard RCR STD-T67, and in particular, to improve the efficiency of framing work as information exchange work that enables wireless communication between wireless terminals such as a parent device, a child device, or a relay device. The present invention relates to a wireless telemeter system.

  In the wireless telemeter system, in order to increase the distance of the wireless communication section from the wireless master device to the microcomputer meter, the communication route is multistaged by interposing a plurality of relay devices on the communication route. In a multi-stage radio telemeter system, the radio master unit has a function of managing terminal information on a communication path. For this reason, the framing work as information exchange work enabling wireless communication between the downstream wireless terminal (device) and the upstream wireless terminal (device) is repeated, and the terminal information of the downstream wireless terminal is transferred to the upstream wireless terminal. Terminal information is aggregated in a wireless master unit that will eventually become the most upstream wireless terminal.

  A system diagram of a conventional radio telemeter system is shown in FIG. As shown in FIG. 12, the radio telemeter system includes a host computer 1, a center network control device 2 connected to the host computer 1, a terminal network control device 4 connected to the center network control device 2 via a telephone line 3, Electricity connected to a wireless master device 5 (hereinafter abbreviated as “master device 5”) connected to the terminal network controller 4 and a wireless slave device 6 (hereinafter abbreviated as “child device 6”) or a relay device 7. The main unit 5 and the sub unit 6 or the relay unit 7 perform data communication wirelessly.

  FIG. 13 is a block diagram of the master unit 5 and the slave unit 6 or the relay unit 7 in the radio telemeter system shown in FIG. 12, and the nonvolatile memory 17 or 27 is used for registering data such as an identification code. . The CPUs 12 and 22 have a clock function and a timer function. In the base unit 5, a wireless communication unit 11 connected to the antenna 10, an interface 13 with a terminal network control device, a ROM 14, a RAM 15, and a nonvolatile memory 17 are connected to the CPU 12. The base unit 5 further includes a battery 16, a switch 18, and a display device 19. In the slave unit 6, a wireless communication unit 21 connected to the antenna 20, an interface 23 with a meter / sensor, a ROM 24, a RAM 25, and a nonvolatile memory 27 are connected to the CPU 22. The subunit | mobile_unit 6 is further provided with the battery 26, the switch 28, and the display apparatus 29. FIG.

  Regarding the edge work performed between the wireless terminals, first, two general types of information exchanged for the edge will be described. The first information is basic information necessary for wireless communication such as a wireless channel to be used, the number of channels, and an identification code and ID unique to each wireless terminal used when calling only a target partner terminal.

  The second information is peculiar to the multistage radio telemeter system, but is route information for reaching the target partner terminal. The route information is information used by the wireless terminal that has received the telegram of the general radio telemeter system shown in FIG. 3 to select the route to the target terminal based on the ID information in the telegram.

  In a conventional multi-stage radio telemeter system, it is necessary to perform a procedure according to a route so that the two types of information can be acquired in one operation. An example of the detailed procedure will be described on the basis of the sequence diagram shown in FIG. 15, taking as an example the case of a route passing through the repeater 7 (A) in FIG. 12. It is assumed that the route design from the master unit 5 to the meter via the slave unit 6 (α) has been designed with a route passing through the relay unit 7 (A) as shown in FIG.

  In FIG. 15, first, the first matching operation is performed between the most downstream slave unit 6 (α) and the relay unit 7 (B) routed to the upstream terminal. Next, the repeater 7 (B) and the repeater 7 (A) are associated with each other. At this time, not only the basic information necessary for wireless communication but also the route information of the repeater 7 (B), the slave unit of the subordinate terminal Information on 6 (α) is also transmitted to the repeater 7 (A). Therefore, the relay device 7 (A) knows that the relay device 7 (B) exists immediately downstream and the slave device 6 (α) exists further downstream of the relay device 7 (B). Then, the matching work is sequentially performed up to the relay device 7 (A) and the slave devices 6 (a to n), and finally the matching work between the relay device 7 (A) and the parent device 5 is performed.

  By performing the rimming operation according to the above procedure, the master unit 5 includes not only the information of the relay device 7 (A) immediately downstream, but also the slave devices 6 (an) of the subordinate terminal of the relay device 7 (A), The route information and basic information of the relay device 7 (B) and the slave device 6 (α) are collected. That is, even if the base unit 5 receives a telegram whose target terminal ID is the slave unit 6 (α) in the telegram shown in FIG. 14, the slave unit 6 (α) is under the control of the relay unit 7 (A). First, the message shown in FIG. 14 should be transferred to the repeater 7 (A), and the received message is transferred to the repeater 7 (A). In the relay device 7 (A), a message is transferred to the relay device 7 (B) for the same reason, and the same operation is repeated there. Finally, the message reaches the child device 6 (α) which is the target terminal. . In other words, the information for selecting a route is equivalent to having terminal information immediately downstream and its subordinate terminal information, so that the subordinate information is transmitted to the upstream terminal in order from the downstream of the route. Can be built on each terminal.

  In the conventional method, in order to aggregate such terminal information to the master unit, detailed route design such as how many stages to the target microcomputer meter are necessary and which terminal is the most downstream is required in advance. That is, since the matching procedure and the communication path are strongly associated, it is necessary to design a detailed path in advance. In addition, in order to carry out more detailed route design, there are many cases where a field survey is required to confirm the installation location of each repeater and the arrival area of radio waves in advance. Furthermore, a repeater between the repeater 7 (B) and the slave unit 6 (α) because of a sudden route change, for example, there is no communication stability between the repeater 7 (B) and the slave unit 6 (α). When mediating 7C (not shown), the route information cannot be transmitted to the relay device 7A and the parent device 5 in the marginal work only in the changed section. From (α), an enormous amount of work is required to redo the matching work again in order.

  In this way, the need for detailed route design and field surveys in advance is a hindrance to the introduction of multi-stage wireless telemeters, and in the work of wireless telemeter systems, sudden route changes due to environmental changes There is a problem that it is difficult to cope with. In consideration of such circumstances, the system to be introduced is limited to a multi-stage system having one or two stages. However, as the market trend, further reduction in the number of wireless master units leads to a reduction in system introduction cost and management cost, and many more stages are required.

There has been proposed a communication system and a communication method that enable transmission / reception through a plurality of communication paths with respect to a slave unit without providing a database such as path information in the center device (see Patent Document 1). According to this, a plurality of communicable paths are acquired in the test process when a registered slave unit is newly installed. A registration request message to which the self-terminal ID is added is transmitted along each route. The slave unit that has received the registration request adds and transmits its own route information (terminal ID, electric field strength, etc.), and the master unit receives the registration request and registers the route information of the registered slave unit. The center device registers the terminal ID of the parent device together with the terminal ID of the registered child device to be registered.
JP 2007-274068 A

Therefore, in the wireless telemeter system, there is a problem to be solved in that it is easy to determine the communication path even if the information exchanged between the wireless terminals in a vertical relationship is limited in the assembling work.
An object of the present invention is to provide a wireless telemeter system that improves the method of linking between wireless terminals and facilitates the introduction and modification of a multi-stage wireless telemeter system.

  In order to achieve the above object, a wireless telemeter system according to the present invention includes a terminal network control device connected to a center network control device via a telephone network, a wireless master device wired to the terminal network control device, A wireless slave device that communicates with the wireless master device directly or via a relay device that relays wireless data, and a microcomputer meter such as gas or water that is wired to the wireless slave device or the relay device, A wireless telemeter system that performs wireless communication of a specific low power wireless method between wireless terminals including the wireless master device, the wireless slave device, and the relay device, wherein wireless communication is performed between the wireless terminals immediately above and below In the framing work to be made possible, as the mutual terminal information to be exchanged, only the basic information necessary for the wireless communication and the up-and-down relationship information on whether the mate is upstream or downstream with respect to itself After exchanging information, the wireless terminal that contains the route information of the wireless terminal is sequentially sent from the wireless terminal that has become the most downstream to the wireless master unit to prompt the opening of the wireless message after the end of the matching operation. The communication path of the wireless communication is determined by transmitting to the terminal.

  According to this wireless telemeter system, a wireless terminal such as a slave unit or a repeater stores whether the counterpart terminal is upstream or downstream at the time of matching work, and from the wireless terminal that has become the most downstream after the matching work is completed. Sequentially, a message that prompts the establishment of a route to the most upstream wireless master unit is transmitted. Even when a new wireless terminal is interrupted and added, the work at the edge work is simplified, and the communication route is determined by a message that automatically prompts the route opening after the edge work. And the introduction of a multi-stage wireless telemeter system is facilitated.

  In this wireless telemeter system, the wireless slave unit or the repeater that performs the framing work is a dedicated changeover switch that identifies whether the mate is an upstream wireless terminal or a downstream wireless terminal. Therefore, it is possible to inform only whether the mating partner is upstream or downstream with respect to itself by only a switch operation, and information setting during the mating operation can be easily performed.

  Further, in this wireless telemeter system, the wireless terminal prompts the opening from the wireless terminal on the downstream side, and adds the route information held by itself to the opening prompt and adds the route information to the message. The information can be updated, and the updated prompt message can be transmitted to the wireless terminal further upstream. According to this wireless telemeter system, when a telegram that prompts the opening of a route is received from a downstream terminal, the information it has is added and further transmitted to the upstream terminal, so that the route information can be easily transmitted to the parent device. Can do.

  Further, in this wireless telemeter system, the wireless master device that has received the message prompting for opening is updated with respect to the wireless slave device or the relay device under its control based on the route information included in the message prompting for opening. And a confirmation prompting message for confirming the communication path is sent back to the wireless terminal that prompts the opening and the message is transmitted, and each wireless terminal on the reply path receives the confirmation prompting message. In response to updating the route information of itself, if it is not the transmission terminal of the telegram that is urged to open, it forwards to the wireless terminal on the downstream side, and if it is the transmission terminal, the route opening process is performed You can display what you have done successfully. According to this wireless telemeter system, when the wireless master device receives a route opening message, it updates the terminal information based on the information in the message and returns a response message indicating the route confirmation. Each wireless terminal on the route can easily know that the route information has been correctly updated from the downstream terminal to the wireless master device.

  Also, in this wireless telemeter system, the wireless slave unit and relay unit on the route that received the confirmation prompt message that is the reply message from the wireless master unit also update the route information, and send the opening prompt message that prompts itself to open the route. If not, the downstream terminal that sent the message prompting the opening of the message exists, so the reply message is transferred to the downstream terminal that sent the message prompting the opening. Display means for determining that the opening process has been correctly performed. Therefore, the operator's rudimentary mistake based on the error of presence / absence of the downstream terminal is eliminated.

  In addition, the wireless slave unit or repeater in this wireless telemeter system measures the time after the framing work as means for confirming whether there is framing information with the downstream terminal as the transmission process of the telegram for encouraging the route opening. Have means. If no wireless terminal is registered on the downstream side within a predetermined time, it can be determined that the wireless terminal itself is the most downstream wireless terminal. That is, even when the worker forgets to work, the route opening process is automatically performed after a predetermined time has elapsed, and therefore, a multi-stage wireless telemeter system with improved work reliability can be provided. It becomes possible.

  Furthermore, in this wireless telemeter system, the wireless master unit that has received the message prompting for opening checks whether or not the route information of the same series exists in the registered data, and if there is the route information data, The total number of the wireless terminals registered on the communication path is calculated from the data, and compared with the number of terminals of the received message contents, the data having the large number of terminals can be updated as the latest information. That is, the wireless master unit has a means for confirming whether route information of the same series as the received message for encouraging route establishment has already been registered, and for comparing the number of terminals. Work can be facilitated.

  According to the wireless telemeter system according to the present invention, information exchanged between wireless terminals that are in a vertical relationship in the matching work is limited. Therefore, for a situation such as the addition of a repeater, the matching is performed in the order of the route from the master unit. Since there is no need to perform work, it is possible to easily determine the communication route without performing detailed route design in advance. As a result, the work between the wireless terminals is improved, and the multi-stage wireless telemeter The system can be easily introduced and modified.

  An embodiment of a wireless telemeter system according to the present invention will be described with reference to the drawings. FIG. 1 to FIG. 3 are examples of messages for route opening relating to the embodiments of the wireless telemeter system according to the present invention. The hardware configuration of the radio telemeter system according to the present invention may be the same as the configuration of the conventional radio telemeter system shown in FIGS. 12 to 15, and the description thereof is omitted here.

  In the embodiment of the wireless telemeter system according to the present invention, first, the information exchanged by the matching operation includes basic information necessary for wireless communication such as a wireless channel and the number of channels used for wireless communication, Thus, there are only two pieces of information, that is, the up-and-down relationship information indicating whether the wireless terminal is on the upstream side or the wireless terminal on the downstream side. As in the case of the conventional method, when the edge work is performed on the route passing through the repeater 7 (A) in FIG. 12, in the present invention, since it is not necessary to relate to the route order from the master unit 5, the repeater 7 (A ) And the slave unit 6 (a to n), no problem occurs.

  Further, in the present invention, as the work procedure of the assembly work, the relay machine 7 (A) and the relay machine 7 (B), the relay machine 7 (B) and the child machine 6 (α), and finally the relay machine 6 (A). Therefore, it is not necessary to proceed with the rimming work in the order of the communication path. Therefore, as in the previous example, even if a route change that mediates the repeater 7 (C) (not shown) between the repeater 7 (B) and the slave 6 (α) suddenly occurs, the changed section Therefore, it is only necessary to perform the assembling work between the relay device 7 (B) and the relay device 7 (C) and between the relay device 7 (C) and the slave device 6 (α).

  When the operator operates a dedicated switch or the like provided in the slave unit 6 (α) that is the most downstream (excluding the meter) as a result of completing the matching work in all the wireless terminals on the wireless communication path, the slave unit 6 (Α) transmits a route opening message as shown in FIG. 1 to the repeater 7 (B), which is a radio terminal on the upstream side, based on the information obtained in the matching operation. The dedicated switch is a switch for identifying the slave unit 6 (α) itself as a wireless terminal on the downstream side with respect to the relay unit 7 (B). Here, the message format of FIG. 1 will be described. “RRQ” indicates that the message is a message that prompts the route opening as a processing type (a message for opening a message), and among the data, the terminal number data “001” This indicates that only one slave unit 6 (α) is provided (that is, the slave unit 6 (α) is the most downstream terminal). Further, the data of the slave unit 6 (α) is composed of an ID and identification code data (in this example, the ID is “211” and the identification code is “000000000211”).

  On the other hand, the up-down relationship information indicating whether the matching partner is a terminal corresponding to upstream or downstream is obtained from the above-described dedicated switch, and the switch is set by the operator. For example, in FIG. 12, when the repeater 7 (A) and the repeater 7 (B) perform matching work, in the repeater 7 (A), the matching partner is switched to the side indicating the downstream terminal, and the repeater 7 ( In B), the framing operation is performed in a state in which the framing partner is switched to the upstream terminal side. For this reason, it is possible to easily store up-down relationship information indicating whether the terminal is an upstream or downstream terminal with respect to the partner.

  FIG. 2 shows a path opening message transmitted from the wireless terminal that has received the message shown in FIG. 1 to the upstream wireless terminal. The relay 7 (B) that has received the message for prompting the opening of the route (FIG. 1) knows that the message is a message from the processing type “RRQ”, and additionally updates its own information as shown in FIG. The number is changed to “002” (that is, a total of two terminals of self and the slave unit 6 (α)) and transmitted to the relay unit 7 (A) which is an upstream terminal of the relay unit 7 (B). The data includes an ID and an identification code for each of the relay device 7 (B) and the slave device 6 (α). For the repeater 7 (B), the ID is “210” and the identification code is “000000000210”. Similarly, the relay device 7 (A) that has received the message shown in FIG. 2 knows that the message is a message that prompts the opening of the route, and as shown in FIG. 3, information on itself (relay device 7 (A)). And the information of its subordinate terminals (slave unit 6 (a),..., Slave unit 6 (n), relay unit 7 (B), slave unit (6 (α)) are added and updated. The ID of the relay device 7 (A) is “110”, the identification code is “000000000110”, the ID of the slave device (a) is “111”, the identification code is “000000000111”, and so on. Since the master device 5 can know the relay device 7 (A) and its subordinate terminal information, it can collect all information necessary for route selection related to the relay device 7 (A). That's right.

  Next, the base unit 5 returns a response message shown in FIG. 4, that is, a confirmation prompting message for confirming the communication path to the relay device 7 (A). Here, in the message format shown in FIG. 4, the processing type “RET” indicates the type of route determination, and the number of hops indicates the number of relays (the number of stages) from the parent device 5. That is, for the relay device 7 (A), the number of hops from the parent device 5 is “001”, and the data of the parent device 5 is the ID and identification code of the parent device 5 (in this example, 001 and 000000000001). .

  The relay device 7 (A) that has received the response message (confirmation prompting message) from the parent device 5 knows that the route has been confirmed, registers the relay device 7 (B) and its subordinate terminal information, and has its own parent device. Record that the number of hops from 5 is “001”. Thereafter, as “002” obtained by adding 1 to the number of hops of the received message shown in FIG. 4, the updated confirmation message as shown in FIG. 5 is returned to the repeater 7 (B).

  When the repeater 7 (B) receives the confirmation prompting message shown in FIG. 5, the same processing as described above is performed, and the updated confirmation shown in FIG. 6 is added by adding 1 to the number of hops based on the message shown in FIG. A prompt message is returned to the child device 6 (α). The slave unit 6 (α) that has received the confirmation prompting message shown in FIG. 6 performs the same processing. Further, if a display indicating that the route has been successfully opened (for example, the LED indicating the status of the route being opened is lit for 10 seconds), the result is reflected on the operator who has opened the route, and the work is trusted. Will be improved.

  When an operator mistakenly operates the dedicated switch of the repeater 7 (B) that is not the most downstream terminal in order to send a dedicated message that prompts the opening of the route (the message shown in Fig. 1 (the message that encourages opening)) Will be described. Since it is correct steering to operate the dedicated message from the most downstream terminal by operating the dedicated switch, it is an erroneous operation to transmit the message from the upstream terminal other than the most downstream terminal. In this case, according to the present invention, the relay device 7 (B) knows that the child device 6 (α) exists as its downstream terminal, and therefore blinks the LED indicating the path opening status. As a result, the operator is notified that there is an error in the operation, and the transmission operation of the telegram for prompting the route opening is not performed. This operation of the repeater 7 (B) can further improve the reliability of the edge work.

  FIG. 7 shows the processing contents of the radio telemeter system according to the present invention as a flow. According to the flowchart shown in FIG. 7, the slave unit 6 or the relay unit 7 confirms whether or not the edge is set (step 1), and when the edge is set, the timer for time measurement is started (step 2). . Next, the elapsed time from the timer start is confirmed as a predetermined time, which is 2 hours in this example (step 3). If two hours have not elapsed, the presence of the downstream wireless terminal is confirmed from the association information (step 6). If it is found that there is a wireless terminal on the downstream side, the process proceeds to communication standby processing (step 5). On the other hand, if there is no downstream wireless terminal, the elapsed time is confirmed again (step 3). If registration of the wireless terminal on the downstream side is still not confirmed after two hours have passed since the match was confirmed (determination is NO in step 6 and YES in step 3), it is the most downstream It is determined that the terminal is a wireless terminal, and a transmission process of a telegram that prompts the establishment of a route (transmission prompting telegram) is performed (step 4). By performing such a process, even if the operator forgets the route opening work, the route opening work is automatically performed, so that the reliability of the system can be expected to be improved.

  Further, as a wireless terminal that automatically transmits a route opening telegram (a message prompting for opening), in this example, there is a case where the telegram is transmitted from a plurality of terminals 6 (an) and 6 (α). It is done. In the radio telemeter system according to the present invention, the base unit 5 first receives the telegram shown in FIG. 8 from the relay unit 7 (A) including the information of the slave unit 6 (a), and then the slave unit 6 ( The operation when the message shown in FIG. 3 is received from the repeater 7 (B) including the information α) will be described with reference to the flowchart shown in FIG. When the base unit 5 first receives a message including information on the slave unit 6 (a) shown in FIG. 8, the terminal data (in this example, the relay unit 7 (A (Step 11). Here, paying attention to the head data in the data string of ID and identification code means paying attention to the most upstream terminal on the route other than the parent device 5, and is a message from the wireless terminal of the route of the same series. This is to easily determine whether or not.

  Next, it is confirmed whether or not the data of interest has already been registered with its own route information (step 12). If it has not been registered, a new registration is made based on the contents of the message (step 15), and the registration is shown in FIG. A response message (a message for prompting confirmation) is returned (step 16). After that, the master unit 5 that has received the telegram (opening prompting telegram) shown in FIG. 3 from the slave unit 6 (α) again has terminal data (in this example, the relay unit 7 (A ) (Step 11), and confirms whether it has already been registered with its own route information (step 12). At this time, since it has already been registered, when the data of interest, that is, the number of terminals on the route related to the relay 7 (A) is confirmed, the information of the message (opening prompt message) shown in FIG. 8 is registered. Therefore, it is known that it is “2” (step 13). That is, since a message is transmitted from the slave unit (a) first, the message is transmitted to the master unit through the route “subunit (a) → relay unit (A) → master unit”. The number of terminals in the opening prompt message transmitted from the machine (A) to the parent machine is “self + child machine (a) = 2”.

  When the terminal number data in the received message shown in FIG. 3 from the slave unit 6 (α) is compared with the number of already registered terminals (step 14), the number of terminals “4” in the received message is already registered. It is confirmed that the value is larger than the number of finished terminals “2”. That is, when a telegram is transmitted from the slave unit (α) and a message is transmitted, as shown in FIG. It is transmitted to the machine. Here, the number of terminals in the message is “self (child device (α)) = 1” in the message from the child device (α) to the relay device (B), and from the relay device (B) to the relay device (A). "Self (relay machine (B)) + slave unit (α)) = 2" in the message to, and "Self (relay machine (A)) + repeater ( B) + Slave unit (α) + Slave unit (a)) = 4 ”. For this reason, the registration data is updated with the information shown in FIG. 3 which is a received message (step 15), and the message (determination prompting message) shown in FIG.

  On the other hand, it is also considered that the signals are received in the reverse order of the above example. That is, after receiving the message (opening prompting message) shown in FIG. 8 from the slave unit 6 (α) and then receiving the message (opening prompting message) shown in FIG. Therefore, since the number of registered data terminals is larger, the telegram (determination prompting telegram) shown in FIG. 11 is returned (step 17), and the telegram content is discarded. Here, if the relay device 7 and the slave device 6 that have received the electronic message (confirmation prompting message) in FIG. 11 do not update the data, even when another wireless terminal on the same route automatically transmits the route opening energization statement. Correct route registration can be performed.

It is an example of the message | telegram of the path opening concerning embodiment of this invention. It is an example of the message | telegram of the path opening concerning embodiment of this invention. It is an example of the message | telegram of the path opening concerning embodiment of this invention. It is an example of the response message with respect to the message of the path opening concerning the embodiment of this invention. It is an example of the response message with respect to the message of the path opening concerning the embodiment of this invention. It is an example of the response message with respect to the message of the path opening concerning the embodiment of this invention. It is a flowchart when transmitting the path opening energization sentence automatically of the embodiment of the present invention. It is an example of the message | telegram of the path opening concerning embodiment of this invention. It is a processing flow figure at the time of the main | base station of embodiment of this invention receiving a path | route opening electricity supply sentence. It is the example of a message | telegram of the path opening between the subunit | mobile_unit and relay machine concerning embodiment of this invention, between relay machines, and between a relay machine and a main | base station. It is an example of the response message with respect to the message of the path opening concerning the embodiment of this invention. It is a system diagram of a conventional radio telemeter system. It is a block diagram of the conventional main | base station, a subunit | mobile_unit, and a relay machine. It is a message format diagram from a general center. It is the sequence diagram which showed the procedure of the conventional edge work.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Host computer 2 Center network control device 3 Telephone line 4 Terminal network control device 5 Master unit 6 Subunit 7 Repeater 8 Meter 10 Antenna 11 Wireless communication unit 12 CPU 13 I / F for connection with terminal network control device
14 ROM 15 RAM
16 Battery 17 Non-volatile memory for data registration 18 Switch 19 Display device 20 Antenna 21 Wireless communication unit 22 CPU 23 I / F for connection with meter and sensor
24 ROM 25 RAM
26 Battery 27 Data Registration Nonvolatile Memory 28 Switch 29 Display Device

Claims (7)

A terminal network control device connected to the center network control device via a telephone network, a wireless master device wired to the terminal network control device, and a relay device that relays wireless data directly or with the wireless master device A wireless slave device that communicates via the wireless slave device or a microcomputer meter such as gas or water that is wired to the wireless slave device or the relay device, and includes the wireless master device, the wireless slave device, and the relay device. A wireless telemeter system that performs wireless communication of a specific low power wireless system between terminals, and is to be exchanged in a matching operation performed to enable wireless communication between the wireless terminals immediately above and below As terminal information, perform basic information necessary for the wireless communication and information exchange only on the relationship between the upstream and downstream of the partner to be associated with itself,
After completion of the matching operation, the wireless terminal that includes the route information of the wireless terminal and that prompts the opening of the route is transmitted from the wireless terminal that has become the most downstream to the wireless base station, and a telegram is transmitted to the wireless terminal on the upstream side. By doing so, a communication path for the wireless communication is determined.   The wireless slave unit or the repeater that performs the framing operation includes a dedicated changeover switch that identifies whether the mate is an upstream wireless terminal or a downstream wireless terminal. The radio telemeter system according to claim 1, wherein:   In response to receiving the opening prompt message from the wireless terminal on the downstream side, the wireless terminal updates the route information by adding the route information held by itself to the opening prompt message, and updated. The wireless telemeter system according to claim 1 or 2, wherein the message for prompting opening is transmitted to the wireless terminal further upstream.   The wireless master device that has received the message prompting for opening and updating the information about the wireless slave device or the relay device under its control based on the route information included in the message prompting for opening and the communication route A confirmation prompting message for confirmation is sent to the wireless terminal that sent the message by prompting the opening of the message, and each wireless terminal on the reply path sends its own route information in response to receiving the confirmation prompting message. In addition to updating, if it is not the transmission terminal of the message, it is transferred to the wireless terminal on the downstream side, and if it is the transmission terminal, it displays that the route opening process has been successfully performed. The radio telemeter system according to any one of claims 1 to 3.   The wireless slave device or the relay device that performed the matching operation cancels the outgoing call processing when the wireless terminal is registered further downstream when the outgoing call is prompted by the electronic message, and the downstream side The radio telemeter system according to claim 1, wherein a display notifying the presence of the radio terminal is performed.   The wireless slave device or the relay device that has performed the matching operation determines that it is the most downstream wireless terminal if there is no wireless terminal registration on the downstream side within a predetermined time, and automatically 2. The radio telemeter system according to claim 1, wherein the electronic telegram is sent to promptly open the communication.   The wireless master device that has received the message prompting for opening confirms whether or not the route information of the same series exists in the registered data, and if there is the route information data, registers it on the communication route from that data The total number of the wireless terminals being calculated is calculated, and compared with the number of terminals in the received telegram content, the data with the large number of terminals is updated as the latest information. The radio telemeter system according to the item.