A short-distance communication system in a metering box and its wireless connection method

Abstract

A short-distance communication system in a metering box and its wireless connection method, including a pre-meter controller, an electric energy meter, and a post-meter circuit breaker. By canceling the HPLC module in the pre-meter controller and assembling a wireless communication module, the pre-meter controller and the post-meter circuit breaker are respectively connected to the electric energy meter through the wireless communication module, and the concentrator obtains the device information of the pre-meter controller and the post-meter circuit breaker through the electric energy meter; or cancel the HPLC module in the electric energy meter, and set wireless communication modules for communication connection in the pre-meter controller, the electric energy meter, and the post-meter circuit breaker. The concentrator respectively accesses the electric energy meter and the post-meter circuit breaker through the forwarding functions of the pre-meter controller and the electric energy meter. The present invention reduces the number of HPLC modules, thereby reducing costs and power consumption and reducing line losses.

Description

Technical Field

[0001] The present invention relates to the technical field of low-voltage power distribution, and particularly relates to a short-distance communication system in a metering box and a wireless connection method thereof. Background Art

[0002] Low-voltage power line broadband carrier communication is a special communication method that uses low-voltage power distribution lines (380 / 220V user lines) as information transmission media for voice or data transmission. Based on the premise of not requiring re-wiring, this technology realizes the bearing of multiple services such as data, voice, and video on existing power lines.

[0003] Currently, the communication inside the metering box and the communication with the substation concentrator mainly adopt the method of broadband power line carrier for communication. Among them, the concentrator conducts data communication with the operation and acquisition main station in the upstream, and realizes the convenient transmission of communication data on the power line through the HPLC module in the downstream. The upstream of the pre-meter controller is connected to the concentrator through the HPLC module for communication connection, realizing the access of the concentrator to the data and status of the pre-meter controller and related programming, etc. The upstream of the electric energy meter generally adopts the HPLC module for communication with the concentrator. The downstream of the electric energy meter interacts with the post-meter circuit breaker, usually adopting wired and wireless methods. The wired method is two wires, one of which is the fee control wire for controlling the opening and closing of the post-meter miniature circuit breaker, and the other is the feedback wire for collecting the switch status of the post-meter circuit breaker; the wireless method is usually Bluetooth communication for controlling the opening and closing of the post-meter miniature circuit breaker and collecting the data and status of the post-meter miniature circuit breaker, etc. It can be seen that in existing products, HPLC modules are provided in both the pre-meter controller and the electric energy meter. However, due to the high cost of the HPLC module, one HPLC module is set in the concentrator, the pre-meter circuit breaker, and multiple electric energy meters, resulting in too high cost of the metering box and being not conducive to market promotion. Summary of the Invention

[0004] The purpose of the present invention is to overcome the defects of the prior art and provide a short-distance communication system in a metering box with a lower cost and a wireless connection method thereof.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A short-distance communication system in a metering box includes a pre-meter controller arranged in the metering box. Multiple control lines are led out from the pre-meter controller, and an electric energy meter and a post-meter circuit breaker are sequentially connected to each control line. The electric energy meter is provided with an HPLC module and a wireless communication module, and the pre-meter controller and the post-meter circuit breaker are respectively provided with a wireless communication module;

[0007] The pre-meter controller is connected to one of the electricity meters through their respective wireless communication modules. The pre-meter controller serves as the first logical device of the electricity meter, and the electricity meter can receive and store the data of the pre-meter controller.

[0008] The post-meter circuit breaker is connected to the electricity meter in the same control line through their respective wireless communication modules. The post-meter circuit breaker serves as the second logical device of the electricity meter.

[0009] The HPLC module of the electricity meter is used for communication connection with the concentrator. The concentrator is connected to all electricity meters, and the concentrator accesses the first logical device and the second logical device through the HPLC module of the electricity meter.

[0010] Furthermore, the wireless communication modules of the electricity meter, the pre-meter controller, and the post-meter circuit breaker are all Bluetooth modules.

[0011] A wireless connection method for a short-distance communication system in a metering box based on the above. The wireless module of the electricity meter includes a master mode and a slave mode. After the wireless module of the electricity meter uses the master mode to connect to the wireless module of the post-meter circuit breaker in the same control line, the wireless module of one of the electricity meters is scanned and connected by the wireless module of the pre-meter controller in the slave mode.

[0012] Preferably, the wireless module of the electricity meter is a Bluetooth module integrated with master and slave modes. The electricity meter adds an information code that can identify the device type of the electricity meter in the Bluetooth broadcast. The wireless module of the pre-meter controller is a Bluetooth module in the master mode, and the wireless module of the post-meter circuit breaker is a Bluetooth module in the slave mode.

[0013] The Bluetooth modules of the electricity meter and the post-meter circuit breaker both turn on Bluetooth broadcast. After the connection and pairing between the electricity meter and the post-meter circuit breaker are completed, the Bluetooth module of the post-meter circuit breaker turns off Bluetooth broadcast.

[0014] The Bluetooth module of the pre-meter controller selects and connects and pairs with the Bluetooth module of the electricity meter with the strongest current signal during the Bluetooth scanning process.

[0015] A short-distance communication system in a metering box includes a pre-meter controller arranged in the metering box. The pre-meter controller is provided with an HPLC module for connecting to the concentrator. Multiple control lines are led out from the pre-meter controller. An electricity meter and a post-meter circuit breaker are sequentially connected on each control line. A wireless communication module is arranged in each of the pre-meter controller, the electricity meter, and the post-meter circuit breaker.

[0016] The electricity meter is communicatively connected to the circuit breaker behind the meter in the same control circuit through their respective wireless communication modules. The electricity meter is communicatively connected to the controller in front of the meter through their respective wireless communication modules. The concentrator accesses the electricity meter through the forwarding function of the controller in front of the meter. The concentrator and the controller in front of the meter access the circuit breaker behind the meter through the electricity meter address plus the logical address.

[0017] Further, the wireless communication modules in the controller in front of the meter, the electricity meter, and the circuit breaker behind the meter are all Bluetooth modules.

[0018] Further, the controller in front of the meter adds the address information of the electricity meter to the address information list of the controller in front of the meter, and the electricity meter adds the circuit breaker behind the meter on the same control circuit to the logical device list of the electricity meter;

[0019] When the concentrator accesses the address information of the electricity meter and the address information of the controller in front of the meter contains the address information of the same electricity meter, the controller in front of the meter forwards the information to the electricity meter, enabling the concentrator to access and operate on the electricity meter; in the information received by the electricity meter, if the logical address information is not included, it means the information is sent to the electricity meter, and the concentrator and the controller in front of the meter access the electricity meter; if the logical address information is included in the information received by the electricity meter, it means the information is sent to the circuit breaker behind the meter, and the electricity meter repackages the information and sends it to the circuit breaker behind the meter. The concentrator and the circuit breaker behind the meter access the circuit breaker behind the meter through the electricity meter address plus the logical address.

[0020] A wireless connection method for a short-distance communication system in a metering box based on the above, the wireless module of the electricity meter includes a master mode and a slave mode. After the wireless module of the electricity meter is connected to the wireless module of the circuit breaker behind the meter in the same control circuit in the master mode, the wireless module of the electricity meter is scanned and connected by the wireless module of the controller in front of the meter in the slave mode. Subsequently, the electricity meter receives the random pairing code sent by the controller in front of the meter and forwards the random pairing code to the circuit breaker behind the meter in the same control circuit. The circuit breaker behind the meter receives it and sends the random pairing code to the power line controlled by the circuit breaker behind the meter, or the electricity meter directly forwards the random pairing code to the power line controlled by the circuit breaker behind the meter on the same control circuit. After the controller in front of the meter obtains the consistent random pairing code from the power line, the controller in front of the meter adds the address information of the electricity meter to the address list information of the controller in front of the meter.

[0021] Preferably, the wireless module of the electricity meter is a Bluetooth module integrated with the master-slave mode. The electricity meter adds an information code that can identify the device type of the electricity meter in the Bluetooth broadcast. The wireless module of the controller in front of the meter is a Bluetooth module in the master mode, and the wireless module of the circuit breaker behind the meter is a Bluetooth module in the slave mode;

[0022] The Bluetooth modules of the electricity meter and the circuit breaker behind the meter both enable Bluetooth broadcasting. After the electricity meter and the circuit breaker behind the meter complete connection pairing, the Bluetooth module of the circuit breaker behind the meter turns off Bluetooth broadcasting;

[0023] After the Bluetooth module of the controller in front of the meter scans that the Bluetooth broadcasting of the Bluetooth module in the circuit breaker behind the meter has been turned off, the Bluetooth module of the controller in front of the meter connects and pairs with the Bluetooth modules of all electricity meters in sequence according to the signal strength, and the controller in front of the meter sends a random pairing code to the electricity meter. After receiving the random pairing code, the electricity meter forwards it to the circuit breaker behind the meter on the same control line. After receiving the random pairing code, the circuit breaker behind the meter uses the current fingerprint circuit to send the random pairing code to the power line controlled by the circuit breaker behind the meter.

[0024] Preferably, the wireless module of the electricity meter is a Bluetooth module integrated with master-slave modes. An electric current generating circuit is built in the electricity meter. The electricity meter adds an information code that can identify the device type of the electricity meter to the Bluetooth broadcasting. The wireless module of the controller in front of the meter is a master-mode Bluetooth module, and the wireless module of the circuit breaker behind the meter is a slave-mode Bluetooth module;

[0025] The Bluetooth modules of the electricity meter and the circuit breaker behind the meter both enable Bluetooth broadcasting. After the electricity meter and the circuit breaker behind the meter complete connection pairing, the Bluetooth module of the circuit breaker behind the meter turns off Bluetooth broadcasting;

[0026] After the Bluetooth module of the controller in front of the meter scans that the Bluetooth broadcasting of the Bluetooth module in the circuit breaker behind the meter has been turned off, the Bluetooth module of the controller in front of the meter connects and pairs with the Bluetooth modules of all electricity meters in sequence according to the signal strength, and the controller in front of the meter sends a random pairing code to the electricity meter. After receiving the random pairing code, the electricity meter directly forwards it to the power line controlled by the circuit breaker behind the meter on the same control line through the electric current generating circuit.

[0027] Preferably, the controller in front of the meter obtains the random pairing code on the power line through sampling. When the random pairing code obtained by the controller in front of the meter is consistent with the sent random pairing code, the controller in front of the meter adds the address information of the electricity meter to the address information list of the controller in front of the meter;

[0028] When the random pairing code obtained by the controller in front of the meter is inconsistent with the sent random pairing code, the controller in front of the meter and the electricity meter reconnect and pair through their respective wireless modules until all scanned electricity meters have been verified.

[0029] A short-distance communication system in a metering box and its wireless connection method according to the present invention cancel the HPLC module in the pre-meter controller, add a wireless communication module with small size and low cost in the pre-meter controller, so that the pre-meter controller and the post-meter circuit breaker are respectively connected to the electric energy meter through the wireless communication module, and the concentrator obtains the device information of the pre-meter controller and the post-meter circuit breaker through the electric energy meter, reducing the overall cost of the metering box and reducing line losses; in addition, the large-sized HPLC module is cancelled, so that the pre-meter controller has a large amount of remaining space and can install other accessories.

[0030] Alternatively, a short-distance communication system in a metering box and its wireless connection method according to the present invention cancel the HPLC module in the electric energy meter, and the concentrator can respectively obtain the device information of the electric energy meter and the post-meter circuit breaker through the forwarding functions of the pre-meter controller and the electric energy meter, greatly reducing the cost of the metering box, reducing the overall power consumption, and reducing line losses; in addition, the pre-meter controller can collect the data of the electric energy meter and can implement some edge computing functions. Brief Description of the Drawings

[0031] Figure 1 is a schematic diagram of the first embodiment of a short-distance communication system in a metering box and its wireless connection method according to the present invention;

[0032] Figure 2 is a schematic diagram of the second embodiment of a short-distance communication system in a metering box and its wireless connection method according to the present invention. Detailed Embodiments

[0033] The following Figures 1 to 2 given embodiments further illustrate the specific implementation manners of a short-distance communication system in a metering box and its wireless connection method according to the present invention. The short-distance communication system in a metering box and its wireless connection method according to the present invention are not limited to the descriptions of the following embodiments.

[0034] A short-distance communication system in a metering box includes a concentrator disposed outside the metering box and connected to the metering box. The concentrator serves as a key communication node in the substation area. The concentrator communicates with the operation and acquisition master station in the upstream and communicates with the devices in the metering box in the downstream, reporting the collected data and status to the operation and acquisition master station. The concentrator usually communicates with the devices in the metering box using an HPLC module.

[0035] The devices installed in the metering box include a pre-meter controller and multiple control lines led out from the pre-meter controller. The pre-meter controller is connected to the incoming line end of the metering box and is used to collect the power consumption situation of the entire metering box. Usually, one pre-meter controller is used in one metering box, and the pre-meter controller can be a pre-meter circuit breaker or a disconnecting switch. An electric energy meter and a post-meter circuit breaker are successively connected to each control line. The electric energy meter is an electric energy metering device with legal metering authorization. The outgoing line end of the post-meter circuit breaker is directly connected to the main switch of the indoor incoming line. The post-meter circuit breaker is used to control the on / off of the power line connected to the indoor area.

[0036] Compared with the short-distance communication system in the existing metering box, the improvement of this application lies in reducing the HPLC modules of the devices in the metering box by adding a wireless communication module, so as to reduce the product cost.

[0037] Combined with Figure 1 Provide an embodiment of the short-distance communication system in the metering box and its wireless connection method. The short-distance communication system in the metering box includes a pre-meter controller installed in the metering box, which is used to connect to a concentrator installed outside the metering box. An HPLC module is provided in the concentrator. The concentrator is connected to the pre-meter controller, and no HPLC module is provided in the pre-meter controller, only a wireless communication module is provided. Multiple control lines led out from the pre-meter controller are also installed in the metering box. Each control line includes an electric energy meter and a post-meter circuit breaker connected in sequence. An HPLC module and a wireless communication module are both provided in the electric energy meter, and only a wireless communication module is provided in the post-meter circuit breaker. The pre-meter controller is connected to one of the electric energy meters through their respective wireless communication modules. The pre-meter controller serves as the first logical device of the electric energy meter. The electric energy meter can receive and save the data of the pre-meter controller. The data of the pre-meter controller includes but is not limited to device ID, logical address information, asset code, etc. The post-meter circuit breaker is connected to the electric energy meter in the same control line through their respective wireless communication modules. The post-meter circuit breaker serves as the second logical device of the electric energy meter and realizes automatic opening and closing, as well as collecting and transmitting the information of the post-meter circuit breaker under the control of the electric energy meter. The concentrator is connected to all electric energy meters. The concentrator obtains the device information of the first logical device and the second logical device from the electric energy meters through the HPLC module. The concentrator can access the pre-meter controller by adding the first logical device address to the electric energy meter address. At this time, the pre-meter controller no longer establishes a wireless connection with other electric energy meters, that is, only one electric energy meter has the first logical device and the second logical device, and the remaining electric energy meters only have the second logical device.

[0038] In this embodiment, the uplink communication method of the electricity meter remains unchanged. By removing the relatively large and costly HPLC module from the front-of-meter controller and adding a small-sized and low-cost wireless communication module to the front-of-meter controller, the front-of-meter controller and the rear-of-meter circuit breaker are respectively connected to the electricity meter through the wireless communication module. Moreover, the front-of-meter controller and the rear-of-meter circuit breaker serve as the first logical device and the second logical device of the electricity meter respectively. When the concentrator accesses the electricity meter, it can obtain the data of the front-of-meter controller and the rear-of-meter circuit breaker through the electricity meter. In addition, after removing the HPLC module from the front-of-meter controller, there is a relatively large remaining space in the front-of-meter controller, which can be used to install other accessories. Additionally, by using the wireless communication module for communication connection inside the metering box, power consumption is saved and line loss is reduced.

[0039] In this implementation, the wireless connection method inside the metering box is as follows: The wireless module of the electricity meter includes a master mode and a slave mode. After the wireless module of the electricity meter is connected to the wireless module of the rear-of-meter circuit breaker in the same control line in the master mode, the wireless module of one of the electricity meters is scanned and connected by the wireless module of the front-of-meter controller in the slave mode. Preferably, the front-of-meter controller selects the electricity meter with the strongest signal among all the electricity meters for communication connection and sends the data of the front-of-meter controller to this electricity meter as the first logical device of this electricity meter. When the electricity meter that can receive and save the data of the front-of-meter controller fails, the front-of-meter controller can replace it with another electricity meter and serve as the first logical device of this electricity meter.

[0040] Specifically, the wireless communication modules of the electricity meter, the front-of-meter controller, and the rear-of-meter circuit breaker are all Bluetooth modules. Among them, the wireless module of the electricity meter is a Bluetooth module integrated with the master-slave mode. The electricity meter adds an information code that can identify the device type of the electricity meter to the Bluetooth broadcast. The wireless module of the front-of-meter controller is a Bluetooth module in the master mode, and the wireless module of the rear-of-meter circuit breaker is a Bluetooth module in the slave mode. The connection and pairing process is as follows: The Bluetooth modules of the electricity meter and the rear-of-meter circuit breaker both turn on the Bluetooth broadcast. After the connection and pairing between the electricity meter and the rear-of-meter circuit breaker are completed, the Bluetooth module of the rear-of-meter circuit breaker turns off the Bluetooth broadcast; during the process of the Bluetooth module of the front-of-meter controller performing Bluetooth scanning, the Bluetooth module of the front-of-meter controller selects the Bluetooth module of the electricity meter with the strongest current signal for connection and pairing.

[0041] In addition, the pairing process of the electricity meter and the rear-of-meter circuit breaker in this embodiment is based on the prior art. For example, the electricity meter connects to multiple rear-of-meter circuit breakers by scanning their Bluetooths in sequence, and then conducts a review by controlling the rear-of-meter circuit breaker to disconnect until the corresponding rear-of-meter circuit breaker is found; or pairs them through the current waveforms of the electricity meter and the rear-of-meter circuit breaker. Of course, other pairing processes can also be adopted.

[0042] Combined with Figure 2Provide an embodiment of a short - distance communication system in a second metering box and its wireless connection method. Different from the first embodiment, an HPLC module and a wireless communication module are both provided in the front - of - meter controller. Only one wireless communication module for communication connection is provided in each of the electric energy meter and the post - meter circuit breaker. Preferably, the wireless communication modules in the front - of - meter controller, the electric energy meter, and the post - meter circuit breaker are all Bluetooth modules. The electric energy meter communicates with the post - meter circuit breaker in the same control line through their respective wireless communication modules, which is used to control the opening and closing of the post - meter circuit breaker and collect and transmit information of the post - meter circuit breaker, etc. The electric energy meter communicates with the front - of - meter controller through their respective wireless communication modules. The front - of - meter controller forwards the obtained electric energy meter data upward to the concentrator. The concentrator can access the electric energy meter and the post - meter circuit breaker through the forwarding function of the front - of - meter controller. Among them, the concentrator and the front - of - meter controller access the post - meter circuit breaker through the electric energy meter address plus the logical address.

[0043] Specifically, after the front - of - meter controller and the electric energy meter are connected and paired through their respective wireless communication modules, the front - of - meter controller adds the address information of the electric energy meter to the address information list of the front - of - meter controller; after the electric energy meter and the post - meter circuit breaker on the same control line are connected and paired through their respective wireless communication modules, the electric energy meter adds the post - meter circuit breaker on the same control line to the logical device list; when the concentrator accesses the address information of the electric energy meter and the address information of the front - of - meter controller contains the address information of the same electric energy meter, the front - of - meter controller forwards the information to the electric energy meter to realize the access and operation of the concentrator to the electric energy meter; in the information received by the electric energy meter, if the logical address information is not included, it means that the information is sent to the electric energy meter. Thus, the concentrator and the front - of - meter controller access the electric energy meter. If the logical address information is included in the information received by the electric energy meter, it means that the information is sent to the post - meter circuit breaker. The electric energy meter repackages the information and sends it to the post - meter circuit breaker. At this time, the repackaged information does not contain the address information of the electric energy meter but contains the address information of the post - meter circuit breaker. Thus, the concentrator and the front - of - meter controller can access the post - meter circuit breaker through the electric energy meter address plus the logical address.

[0044] This embodiment cancels the HPLC modules of all electric energy meters in the metering box. Through the forwarding functions of the front - of - meter controller and the electric energy meter, the concentrator can respectively obtain the data of the electric energy meter and the post - meter circuit breaker, greatly reducing the cost of the metering box. And it does not need to modify the communication protocol between the electric energy meter and the concentrator, reducing the overall power consumption and reducing the line loss. In addition, the front - of - meter controller can collect the data of the electric energy meter and can implement some edge - computing functions, such as comparing the daily electricity consumption (comparing the daily electricity consumption measured in front of the meter with the sum of the daily electricity consumption measured by all electric energy meters behind the meter), which can judge how much the line loss is, whether there is electricity theft or inaccurate equipment metering.

[0045] In this embodiment, the wireless connection method in the metering box is as follows. Based on the short-distance communication system in the metering box, the wireless module in the electric energy meter includes a master mode and a slave mode. After the wireless module of the electric energy meter is connected to the wireless module of the circuit breaker behind the meter in the same control line in the master mode, the electric energy meter adds the circuit breaker behind the meter to the logical device list of the electric energy meter. Subsequently, the wireless module of the electric energy meter is scanned and connected by the wireless module of the controller in front of the meter in the slave mode. The electric energy meter receives the random pairing code sent by the controller in front of the meter and forwards the random pairing code to the circuit breaker behind the meter in the same control line. The circuit breaker behind the meter receives the random pairing code and sends the random pairing code to the power line controlled by the circuit breaker behind the meter. The controller in front of the meter obtains the random pairing code from the power line, and after the controller in front of the meter determines that the random pairing code obtained from the power line is consistent with the previously sent random pairing code, the controller in front of the meter adds the address information of the electric energy meter to its own address information.

[0046] As another solution of this embodiment, the wireless module in the electric energy meter includes a master mode and a slave mode. The connection method between the wireless module of the electric energy meter and the wireless modules of the controller in front of the meter and the circuit breaker behind the meter remains unchanged. However, a current generation circuit is built into the electric energy meter. In this way, after the electric energy meter receives the random pairing code sent by the controller in front of the meter, the current generation circuit directly sends the random pairing code to the power line controlled by the circuit breaker behind the meter in the same control line. Subsequently, after the controller in front of the meter obtains the random pairing code from the power line and determines that it is consistent with the previously sent random pairing code, the controller in front of the meter adds the address information of the electric energy meter to its own address information.

[0047] Specifically, in this embodiment, the wireless module of the electric energy meter is a Bluetooth module integrating the master and slave modes. The electric energy meter adds an information code that can identify the device type of the electric energy meter to the Bluetooth broadcast. The wireless module of the controller in front of the meter is a Bluetooth module in the master mode, and the wireless module of the circuit breaker behind the meter is a Bluetooth module in the slave mode.

[0048] The pairing process is as follows: The Bluetooth modules of the electricity meter and the circuit breaker behind the meter both turn on Bluetooth broadcasting. After the electricity meter and the circuit breaker behind the meter complete the connection and pairing, the Bluetooth module of the circuit breaker behind the meter turns off Bluetooth broadcasting. Subsequently, the Bluetooth module of the controller in front of the meter scans. After scanning that the Bluetooth broadcasting of the Bluetooth module in the circuit breaker behind the meter has been turned off, the controller in front of the meter determines that the electricity meter and the circuit breaker behind the meter have completed the connection and pairing. At this time, the Bluetooth module of the controller in front of the meter connects and pairs with the Bluetooth modules of all electricity meters in sequence according to the signal strength, and the controller in front of the meter sends a random pairing code to the electricity meter. After receiving the random pairing code, the electricity meter forwards it to the circuit breaker behind the meter on the same control line. After receiving the random pairing code, the circuit breaker behind the meter uses the current fingerprint circuit to send the random pairing code to the power line controlled by the circuit breaker behind the meter. Of course, when the electricity meter is built-in with a current generation circuit, the electricity meter directly sends the random pairing code to the power line controlled by the circuit breaker behind the meter on the same control line.

[0049] After the power line receives the random pairing code, the controller in front of the meter obtains the random pairing code on the power line through sampling. When the random pairing code obtained by the controller in front of the meter is the same as the sent random pairing code, the controller in front of the meter adds the address information of the electricity meter to the address information list of the controller in front of the meter;

[0050] When the random pairing code obtained by the controller in front of the meter is inconsistent with the sent random pairing code, it may be an electricity meter in a nearby metering box. The controller in front of the meter abandons the connection with this electricity meter. At this time, the connection and pairing process needs to be repeated, that is, the Bluetooth module of the controller in front of the meter connects to all devices in the scanned Bluetooth list until all scanned electricity meters are verified.

[0051] The pairing process of the electricity meter and the circuit breaker behind the meter in this embodiment is based on the prior art. Of course, other pairing processes can also be adopted. It should be noted that the Bluetooth module of the electricity meter in this embodiment adopts the master-slave mode. In addition to connecting to the circuit breaker behind the meter on the same control line, it also connects to the controller in front of the meter. The Bluetooth of the circuit breaker behind the meter is in the slave mode and only connects to the electricity meter on the same control line. Data access between electricity meters is prohibited, and the controller in front of the meter only connects to the concentrator in the upstream and has no connection relationship with the controllers in front of the meters in other meter boxes.

[0052] The above content is a further detailed description of the present invention in combination with specific preferred embodiments. It cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention belongs, without departing from the concept of the present invention, several simple deductions or substitutions can be made, which should all be regarded as belonging to the protection scope of the present invention.

Claims

1. A short-distance communication system inside a metering box, comprising a pre-meter controller arranged inside the metering box, with multiple control lines led out from the pre-meter controller, and an electric energy meter and a post-meter circuit breaker are sequentially connected to each control line. It is characterized in that: The electricity meter is provided with an HPLC module and a wireless communication module. The pre-meter controller and the post-meter circuit breaker are respectively provided with a wireless communication module, and the HPLC module is not provided in the pre-meter controller; The pre-meter controller is connected to one of the electricity meters through their respective wireless communication modules. The pre-meter controller serves as the first logical device of the electricity meter, and the electricity meter can receive and store the data of the pre-meter controller; The post-meter circuit breaker is connected to the electricity meter in the same control line through their respective wireless communication modules. The post-meter circuit breaker serves as the second logical device of the electricity meter; The HPLC module of the electricity meter is used for communication connection with the concentrator. The concentrator is connected to all electricity meters, and the concentrator accesses the first logical device and the second logical device through the HPLC module of the electricity meter.

2. The short-distance communication system in a metering box according to claim 1, characterized in that: The wireless communication modules of the electricity meter, the pre-meter controller, and the post-meter circuit breaker are all Bluetooth modules; and / or, the pre-meter controller is a pre-meter circuit breaker or a disconnecting switch.

3. A wireless connection method for a short-distance communication system within the metering box according to claim 1 or 2, characterized in that: The wireless module of the electricity meter includes a master mode and a slave mode. After the wireless module of the electricity meter connects to the wireless module of the post-meter circuit breaker in the same control line in the master mode, the wireless module of one of the electricity meters is scanned and connected by the wireless module of the pre-meter controller in the slave mode; When the electricity meter that can receive and store the data of the pre-meter controller fails, the pre-meter controller replaces it with another electricity meter and serves as the first logical device of this electricity meter.

4. The wireless connection method of a short-distance communication system in a metering box according to claim 3, characterized in that: The wireless module of the electricity meter is a Bluetooth module integrated with master-slave modes. The electricity meter adds an information code that can identify the device type of the electricity meter in the Bluetooth broadcast. The wireless module of the pre-meter controller is a Bluetooth module in the master mode, and the wireless module of the post-meter circuit breaker is a Bluetooth module in the slave mode; The Bluetooth modules of the electricity meter and the post-meter circuit breaker both turn on Bluetooth broadcasts. After the connection pairing between the electricity meter and the post-meter circuit breaker is completed, the Bluetooth module of the post-meter circuit breaker turns off the Bluetooth broadcast; The Bluetooth module of the pre-meter controller selects the Bluetooth module of the electricity meter with the strongest current signal for connection pairing during the Bluetooth scanning process.

5. A wireless connection method for a short-distance communication system in a metering box. The short-distance communication system in the metering box includes a pre-meter controller provided in the metering box. The pre-meter controller is provided with an HPLC module for connecting to a concentrator. Multiple control lines are led out from the pre-meter controller. An electricity meter and a post-meter circuit breaker are sequentially connected to each control line. A wireless communication module is provided in each of the pre-meter controller, the electricity meter, and the post-meter circuit breaker; the electricity meter communicates with the post-meter circuit breaker in the same control line through their respective wireless communication modules, and the electricity meter communicates with the pre-meter controller through their respective wireless communication modules, The wireless module of the electricity meter includes a master mode and a slave mode. After the wireless module of the electricity meter is connected to the wireless module of the circuit breaker behind the meter in the same control line in the master mode, the wireless module of the electricity meter is scanned and connected by the wireless module of the controller in front of the meter in the slave mode. Subsequently, the electricity meter receives the random pairing code sent by the controller in front of the meter and forwards the random pairing code to the circuit breaker behind the meter in the same control line. The circuit breaker behind the meter receives it and sends the random pairing code to the power line controlled by the circuit breaker behind the meter, or the electricity meter directly forwards the random pairing code to the power line controlled by the circuit breaker behind the meter in the same control line. After the controller in front of the meter obtains the consistent random pairing code from the power line, the controller in front of the meter adds the address information of the electricity meter to the address list information of the controller in front of the meter; The concentrator accesses the electricity meter through the forwarding function of the controller in front of the meter. The concentrator and the controller in front of the meter access the circuit breaker behind the meter through the electricity meter address plus the logical address; Data access between electricity meters is prohibited, and the controller in front of the meter is only connected to the concentrator upstream and has no connection relationship with the controllers in front of the meters in other meter boxes.

6. The wireless connection method of a short-distance communication system in a metering box according to claim 5, characterized in that: The wireless communication modules in the controller in front of the meter, the electricity meter, and the circuit breaker behind the meter are all Bluetooth modules; and / or, the controller in front of the meter is a circuit breaker in front of the meter or a disconnecting switch.

7. The wireless connection method of a short-distance communication system in a metering box according to claim 5 or 6, characterized in that: The controller in front of the meter adds the address information of the electricity meter to the address information list of the controller in front of the meter, and the electricity meter adds the circuit breaker behind the meter in the same control line to the logical device list of the electricity meter; When the concentrator accesses the address information of the electricity meter and the address information of the controller in front of the meter contains the address information of the same electricity meter, the controller in front of the meter forwards the information to the electricity meter, enabling the concentrator to access and operate the electricity meter; in the information received by the electricity meter, if the logical address information is not included, it means the information is sent to the electricity meter, and the concentrator and the controller in front of the meter access the electricity meter; if the logical address information is included in the information received by the electricity meter, it means the information is sent to the circuit breaker behind the meter, and the electricity meter repackages the information and sends it to the circuit breaker behind the meter. The concentrator and the circuit breaker behind the meter access the circuit breaker behind the meter through the electricity meter address plus the logical address.

8. The wireless connection method of the short-distance communication system in a metering box according to claim 5, characterized in that: The wireless module of the electricity meter is a Bluetooth module integrating the master and slave modes. The electricity meter adds an information code that can identify the device type of the electricity meter to the Bluetooth broadcast. The wireless module of the controller in front of the meter is a Bluetooth module in the master mode, and the wireless module of the circuit breaker behind the meter is a Bluetooth module in the slave mode; The Bluetooth modules of the electricity meter and the circuit breaker behind the meter both turn on the Bluetooth broadcast. After the connection and pairing between the electricity meter and the circuit breaker behind the meter are completed, the Bluetooth module of the circuit breaker behind the meter turns off the Bluetooth broadcast; After the Bluetooth module of the pre-meter controller scans that the Bluetooth broadcast of the Bluetooth module in the post-meter circuit breaker has been turned off, the Bluetooth module of the pre-meter controller connects and pairs with the Bluetooth modules of all electricity meters in sequence according to the signal strength, and the pre-meter controller sends a random pairing code to the electricity meters. After receiving the random pairing code, the electricity meters forward it to the post-meter circuit breaker on the same control line. After receiving the random pairing code, the post-meter circuit breaker uses the current fingerprint circuit to send the random pairing code to the power line controlled by the post-meter circuit breaker.

9. The wireless connection method of a short-distance communication system in a metering box according to claim 5, characterized in that: The wireless module of the electricity meter is a Bluetooth module integrating the master-slave mode. An electric current generating circuit is built in the electricity meter. The electricity meter adds an information code that can identify the device type of the electricity meter in the Bluetooth broadcast. The wireless module of the pre-meter controller is a master-mode Bluetooth module, and the wireless module of the post-meter circuit breaker is a slave-mode Bluetooth module; The Bluetooth modules of the electricity meter and the post-meter circuit breaker both turn on the Bluetooth broadcast. After the connection and pairing between the electricity meter and the post-meter circuit breaker are completed, the Bluetooth module of the post-meter circuit breaker turns off the Bluetooth broadcast; After the Bluetooth module of the pre-meter controller scans that the Bluetooth broadcast of the Bluetooth module in the post-meter circuit breaker has been turned off, the Bluetooth module of the pre-meter controller connects and pairs with the Bluetooth modules of all electricity meters in sequence according to the signal strength, and the pre-meter controller sends a random pairing code to the electricity meters. After receiving the random pairing code, the electricity meters directly forward it to the power line controlled by the post-meter circuit breaker on the same control line through the electric current generating circuit.

10. A wireless connection method for a short-distance communication system in a metering box according to any one of claims 5-9, characterized in that: The pre-meter controller obtains the random pairing code on the power line through sampling. When the random pairing code obtained by the pre-meter controller is the same as the sent random pairing code, the pre-meter controller adds the address information of the electricity meter to the address information list of the pre-meter controller; When the random pairing code obtained by the pre-meter controller is inconsistent with the sent random pairing code, the pre-meter controller and the electricity meter reconnect and pair through their respective wireless modules until all the scanned electricity meters are verified.

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