Remote meter reading terminal applied to electric meter concentrator

Abstract

The utility model discloses a remote meter reading terminal applied to an electric meter concentrator. The remote meter reading terminal comprises a power supply module, a watchdog module, a linear voltage regulator module, a GPRS (General Packet Radio Service) module and an RS485 communication module, the power supply module provides a first power supply for the watchdog module; the watchdog module is used for preventing endless loop of a program; the linear voltage regulator module is used for reducing and stabilizing the voltage of the first power supply and outputting a second power supply to supply power to the GPRS module, the processing module and the RS485 communication module; the GPRS module is connected with the processing module; the processing module is used for sending the electricity utilization data collected by the electricity meter concentrator to a main station through the GPRS module; the RS485 communication module is connected with the electric meter concentrator to transmit power utilization data; wherein the processing module is provided with a Bluetooth communication module, and the Bluetooth communication module is connected with the electric meter concentrator to transmit power utilization data; and the GPRS module is used for logging in a GPRS network, establishing connection with the Internet and sending the power consumption data to a master station.

Description

Technical Field

[0001] The utility model relates to the technical field of intelligent distribution network, in particular to a remote meter reading terminal applied to an electric meter concentrator. Background Art

[0002] With the rapid development of my country's power industry, the gradual advancement of the two-network transformation of the national power system, and the implementation of the "one meter per household, power supply to households" policy, the number of power users has expanded dramatically, the number of industrial and civil power meters has increased, the power network has become increasingly large, and the power supply companies have become more and more tasked with managing the power network. The separation of transmission and distribution in the country requires power supply companies to increase their monitoring of large, medium and small users. Both users and power management departments urgently need the intervention of modern management methods, which has raised new issues for power management departments in terms of standardization, automation and charging networking of power management.

[0003] At present, most electricity management adopts the traditional meter reading method, and the data of electric energy meters are read manually from door to door. There are inevitably many problems, such as: the statistical data is inaccurate and cannot truly reflect the user's electricity consumption; the operation is difficult to standardize, resulting in increased unknown losses; data collection is not timely, and the system status cannot be reflected in real time, and the user behavior cannot be effectively monitored; it consumes a lot of manpower, has high costs, and is inefficient. Obviously, the above-mentioned drawbacks make the manual meter reading management mode unable to adapt to the reform of the power system, and also directly hinder the implementation of advanced management modes such as time-of-use electricity price operation and advance payment of electricity fees. Therefore, the development and research of automatic meter reading systems that are not only oriented to the needs of future power management automation construction, but also adapt to the current operation and management system is the general trend of electricity metering and management. The remote automatic meter reading system combines remote transmission technology and communication technology to connect the billing terminals of each user with the management center. It not only further saves manpower expenses, but also can monitor the consumption of each user in real time, which is conducive to the management department to find problems in time and take corresponding measures to deal with them.

[0004] The remote automatic meter reading system can replace manual daily meter reading work such as low-voltage user meter reading, large user (key user) meter reading, substation meter reading, etc., improve work efficiency, reduce human errors, strengthen user management, and realize the comprehensive automation of a series of load remote monitoring and management work from power collection and transmission, statistical query, line loss analysis, abnormal alarm, report generation, etc.

[0005] However, the current remote automatic meter reading system has the following drawbacks: (1) When the system transmits data to the meter concentrator, the power consumption and communication energy consumption are relatively large; (2) When transmitting data over long distances and on a large scale, the anti-interference ability is poor, which easily leads to data transmission anomalies. Utility Model Content

[0006] The utility model provides a remote meter reading terminal applied to an electric meter concentrator, which is used to solve the technical problems of large power consumption and communication energy consumption and poor anti-interference ability of the existing remote automatic meter reading system, thereby achieving the purpose of reducing data transmission energy consumption and improving data transmission anti-interference ability.

[0007] The utility model achieves the above-mentioned purpose through the following technical solutions:

[0008] A remote meter reading terminal applied to an electric meter concentrator, comprising:

[0009] A power module, providing a first power supply to power the watchdog module;

[0010] Watchdog module, used to prevent the program from dead loop;

[0011] A linear voltage regulator module, used to step down and stabilize the first power supply, and output a second power supply to power the GPRS module, the processing module, and the RS485 communication module;

[0012] The GPRS module is connected with the processing module via an asynchronous serial communication interface;

[0013] A processing module, used for sending the electricity consumption data collected by the electricity meter concentrator to a main station via the GPRS module;

[0014] An RS485 communication module, connected to the electric meter concentrator, for transmitting the electric consumption data collected by the electric meter concentrator to the processing module;

[0015] Among them, the processing module itself is provided with a Bluetooth communication module, which is connected to the meter concentrator and is used to transmit the electricity consumption data collected by the meter concentrator to the processing module; the GPRS module is used to log in to the GPRS network, establish a connection with the Internet, and send the electricity consumption data to the main station.

[0016] As a preferred embodiment of the present utility model, the watchdog module input terminal WDI is connected to the processing module;

[0017] The processing module is used to output a control level to control the watchdog module to disable or enable, so as to prevent the program from an infinite loop.

[0018] As a preferred implementation mode of the utility model, the watchdog module is connected to the linear regulator module;

[0019] The watchdog module is used to output an enable control signal to the enable input terminal of the linear regulator module to enable the linear regulator module; the linear regulator module has a low quiescent current, and achieves low power consumption, low voltage difference, and high-precision output.

[0020] As a preferred implementation of the utility model, the processing module adopts a RISC-V core BLE 5.3 wireless MCU with model CH582M, which has an on-chip integrated RTC module and a 2Mbps low-power Bluetooth communication module, supports Bluetooth OTA upgrade applications, avoids the risk of terminal disassembly and upgrade, and increases the fault tolerance of the terminal code.

[0021] As a preferred implementation mode of the present utility model, the RS485 communication module is connected with a lightning protection device to resist lightning impulse pulses, prevent interference, and ensure stable communication.

[0022] As a preferred embodiment of the utility model, the remote meter reading terminal also includes a key module, which includes at least a reset button and a burn button. The reset button is connected to the reset input end of the processing module to implement system reset control of the terminal, and the burn button is connected to the burn port of the processing module to implement program burning control of the processing module.

[0023] As a preferred embodiment of the utility model, the remote meter reading terminal also includes an indication module, which includes at least a power indicator light, a Bluetooth communication indicator light and an RS485 communication indicator light. The power indicator light is connected to the first power supply to indicate the power-on status; the Bluetooth communication indicator light and the RS485 communication indicator light are connected to the communication signal output end of the processing module to indicate the communication connection and data transmission and reception status.

[0024] It can be seen that the utility model has the following beneficial effects:

[0025] 1. The linear regulator used in the utility model has low quiescent current, can achieve low power consumption and low voltage difference, high-precision output, and the processing module adopts a low-power Bluetooth communication module to realize data transmission to the meter concentrator within the wireless communication range, which greatly reduces the power consumption of the terminal compared with the traditional power consumption and communication energy consumption;

[0026] 2. The communication method between the terminal of the utility model and the meter concentrator adopts Bluetooth communication or RS485 communication. Bluetooth communication is used in short-distance wireless communication, which greatly facilitates the installation and maintenance of the project site to set parameters of the device and view the operation information of the device, and realizes convenient, fast, flexible, safe, low-cost and low-power data communication between devices. RS485 communication has good anti-interference ability and can realize long-distance and large-scale data transmission.

[0027] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a module schematic diagram of the Beidou timing and positioning terminal provided by the utility model;

[0029] Figure 2 It is a circuit schematic diagram of the watchdog module and the linear regulator module provided by the utility model;

[0030] Figure 3 It is the circuit principle diagram of the RS485 communication module provided by the utility model;

[0031] Figure 4 It is a circuit principle diagram of the indicating module provided by the utility model.

[0032] Explanation of the accompanying figures: 1. Power module; 2. Watchdog module; 3. Linear regulator module; 4. GPRS module; 5. Processing module; 6. RS485 communication module; 7. Electric meter concentrator; 8. Bluetooth communication module; 9. Button module; 10. Indication module. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution of the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings of the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the described embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] A remote meter reading terminal embodiment applied to an electric meter concentrator

[0035] See also Figure 1 The utility model relates to a remote meter reading terminal applied to an electric meter concentrator, comprising: a power supply module 1, a watchdog module 2, a linear regulator module 3, a GPRS module 4, a processing module 5 and an RS485 communication module 6. The power supply module 1 provides a first power supply for the watchdog module, the watchdog module 2 is used to prevent the program from having an infinite loop, the linear regulator module 3 is used to step down and stabilize the first power supply, and output a second power supply for the GPRS module 4, the processing module 5 and the RS485 communication module 6.

[0036] The GPRS module 4 is connected to the processing module 5 via an asynchronous serial communication interface, and is used to log into the GPRS network, establish a connection with the Internet, and send the power consumption data to the main station.

[0037] The processing module 5 is used to send the electricity consumption data collected by the meter concentrator 7 to the main station through the GPRS module 4.

[0038] The RS485 communication module 6 is connected to the meter concentrator 7 and is used to transmit the power consumption data collected by the meter concentrator 7 to the processing module 5. The processing module 5 itself is provided with a Bluetooth communication module 8, which is connected to the meter concentrator 7 and is used to transmit the power consumption data collected by the meter concentrator 7 to the processing module 5.

[0039] Specifically, the first power supply voltage described in this embodiment is 5V, and the stepped-down second power supply voltage is 3.3V.

[0040] In this embodiment, the input terminal WDI of the watchdog module 2 is connected to the processing module 5, and the processing module 5 controls the watchdog module 2 to disable or enable by outputting a control level to prevent the program from an infinite loop.

[0041] Specifically, in this embodiment, during the startup of the processing module 5, the input terminal WDI of the watchdog module 2 is suspended or tri-stated through an analog switch, the watchdog module 2 is disabled, its internal counter stops counting, and the output terminal will maintain a high level, which will not affect the normal startup of the system; after the system startup is completed, the processing module 5 enables the watchdog module 2 by outputting a control level to achieve normal dog feeding operation.

[0042] See also Figure 2 In this embodiment, the watchdog module 2 outputs an enable control signal 3.3V_EN to the enable input terminal of the linear regulator module 3, which is used to enable the linear regulator module 3. The linear regulator module 3 has a low quiescent current, and achieves low power consumption, low voltage difference, and high-precision output.

[0043] In this embodiment, the processing module 5 adopts a RISC-V core BLE 5.3 wireless MCU of model CH582M, which has an on-chip integrated RTC module and a 2Mbps low-power Bluetooth communication module, supports Bluetooth OTA upgrade applications, avoids the risk of terminal disassembly and upgrade, and increases the fault tolerance of the terminal code.

[0044] Specifically, the processing module 5 of this embodiment is used to process input data and control output signals. The CH582M chip used has a processing speed of 20MHz, has powerful logical operation processing capabilities to complete the processing of data information, and has rich on-chip peripherals, such as an on-chip integrated 2Mbps low-power Bluetooth BLE communication module, 2 full-speed USB host and device controllers and transceivers, 2 SPIs, 4 serial ports, ADC, touch button detection module, RTC, etc.

[0045] See also Figure 3 In this embodiment, the RS485 communication module 6 is connected with a lightning protection device to resist lightning impulse pulses, prevent interference, and ensure stable communication.

[0046] Specifically, the lightning protection device uses a semiconductor discharge tube of model P0080SA, which is connected across the two ends of the RS485 communication module 6 and has strong surge absorption capability and stability.

[0047] In this embodiment, a button module 9 is also included, and the button module 9 includes at least a reset button and a burning button. The reset button is connected to the reset input end of the processing module 5 to implement system reset control of the terminal, and the burning button is connected to the burning port of the processing module 5 to implement program burning control of the processing module 5.

[0048] See also Figure 4 In this embodiment, an indication module 10 is also included, and the indication module 10 includes at least a power indicator light L1, an RS485 communication indicator light L2, and a Bluetooth communication indicator light L3. The power indicator light is connected to the first power source to indicate the power-on status. The Bluetooth communication indicator light and the RS485 communication indicator light are connected to the communication signal output end of the processing module 5 to indicate the communication connection and data transmission and reception status.

[0049] Specifically, after the terminal of this embodiment is powered on, the power indicator light L1 lights up red, indicating that the power supply is normal. When connected to the meter concentrator 7 through the RS485 communication module 6, the RS485 communication indicator light L2 lights up green. When connected to the meter concentrator 7 through the Bluetooth communication module 8, the Bluetooth communication indicator light L3 lights up green. When the RS485 communication port has data transmission and reception, the RS485 communication indicator light L2 automatically flashes according to the data transmission and reception situation. When the Bluetooth communication port has data transmission and reception, the Bluetooth communication indicator light L3 automatically flashes according to the data transmission and reception situation.

[0050] Specifically, the terminal of this embodiment is connected to the PC through the RS485 communication module 6 and cooperates with the dedicated debugging software to realize the setting and viewing of device parameters, which is convenient for rapid debugging, configuration and testing at the factory stage.

[0051] Specifically, the Bluetooth communication module 8 of this embodiment communicates with special debugging software running on a PC or mobile phone App. The wireless connection method greatly facilitates the on-site installation and operation of the project to set parameters for the device and view device operation information. The terminal supports Bluetooth OTA upgrade applications, avoiding the risk of terminal disassembly and upgrade, and increasing the fault tolerance of the terminal code.

[0052] The above-mentioned implementation modes are only preferred implementation modes of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A remote meter reading terminal applied to an electric meter concentrator, characterized in that: include: A power module, providing a first power supply to power the watchdog module; Watchdog module, used to prevent the program from dead loop; A linear voltage regulator module, used to step down and stabilize the first power supply, and output a second power supply to power the GPRS module, the processing module, and the RS485 communication module; The GPRS module is connected with the processing module via an asynchronous serial communication interface; A processing module, used for sending the electricity consumption data collected by the electricity meter concentrator to a main station via the GPRS module; An RS485 communication module, connected to the electric meter concentrator, for transmitting the electric consumption data collected by the electric meter concentrator to the processing module; Among them, the processing module itself is provided with a Bluetooth communication module, which is connected to the meter concentrator and is used to transmit the electricity consumption data collected by the meter concentrator to the processing module; the GPRS module is used to log in to the GPRS network, establish a connection with the Internet, and send the electricity consumption data to the main station.

2. The remote meter reading terminal applied to the electric meter concentrator according to claim 1 is characterized in that: The watchdog module input terminal WDI is connected to the processing module; The processing module is used to output a control level to control the watchdog module to disable or enable, so as to prevent the program from an infinite loop.

3. The remote meter reading terminal applied to the electric meter concentrator according to claim 1, characterized in that: The watchdog module is connected to the linear regulator module; The watchdog module is used to output an enable control signal to the enable input terminal of the linear regulator module to enable the linear regulator module; the linear regulator module has a low quiescent current, and achieves low power consumption, low voltage difference, and high-precision output.

4. The remote meter reading terminal applied to the electric meter concentrator according to claim 1, characterized in that: The processing module adopts a RISC-V core BLE 5.3 wireless MCU model CH582M, which integrates an RTC module and a 2Mbps low-power Bluetooth communication module on the chip, supports Bluetooth OTA upgrade applications, avoids the risk of terminal disassembly upgrades, and increases the fault tolerance of terminal codes.

5. The remote meter reading terminal applied to the electric meter concentrator according to claim 1, characterized in that: The RS485 communication module is connected with a lightning protection device to resist lightning impulse pulses, prevent interference and ensure stable communication.

6. The remote meter reading terminal applied to the electric meter concentrator according to any one of claims 1 to 5, characterized in that: It also includes a key module, which includes at least a reset key and a burning key. The reset key is connected to the reset input end of the processing module to implement system reset control of the terminal, and the burning key is connected to the burning port of the processing module to implement program burning control of the processing module.

7. The remote meter reading terminal applied to an electric meter concentrator according to any one of claims 1 to 5, characterized in that: It also includes an indication module, which includes at least a power indicator light, a Bluetooth communication indicator light and an RS485 communication indicator light. The power indicator light is connected to the first power supply to indicate the power-on status; the Bluetooth communication indicator light and the RS485 communication indicator light are connected to the communication signal output end of the processing module to indicate the communication connection and data sending and receiving status.

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