Distributed power cable infrared temperature monitoring system based on Zigbee peer-to-peer network

Abstract

The invention relates to a power cable infrared temperature monitoring system based on a Zigbee peer-to-peer network. The power cable infrared temperature monitoring system comprises at least one measured power cable, at least two non-contact wireless temperature measuring units, a communication coordinator, a controller and a background monitoring system server. The non-contact wireless temperature measurement unit adopts a non-contact infrared temperature measurement sensor and is mounted near a measured power cable; one non-contact infrared temperature measurement unit is in communication connection with the next non-contact infrared temperature measurement unit and the communication coordinator in sequence to form a Zigbee network; the Zigbee network is in a peer-to-peer connection state; and the communication coordinator, the controller and the background system server are sequentially connected through the RJ45 communication module to form a communication network. According to the invention, targeted and accurate temperature measurement can be carried out on the intermediate joint of the power cable, the system has the characteristics of low power consumption, flexible networking, low maintenance cost, low installation difficulty and low installation cost, and the effective communication range of a temperature monitoring system can be greatly increased.

Description

Technical Field

[0001] The present invention relates to the technical field of power cable temperature monitoring, and in particular to a distributed power cable infrared temperature monitoring system based on a Zigbee peer-to-peer network. Background Art

[0002] Zigbee technology is a technical solution between Bluetooth communication technology and wireless tag technology. Thanks to its advantages in power consumption, networking freedom and cost, this communication technology has broad application prospects in consumer electronics, smart homes, industrial control and medical diagnosis. As the main communication technology method for power cable temperature monitoring, it has also received widespread attention.

[0003] However, the power cable temperature monitoring system that currently uses Zigbee technology usually uses the communication connection of the Zigbee star network structure. Limited by the characteristics of Zigbee technology, its transmission distance is limited, and the maximum theoretically can be 100 meters. It is less applicable to long-distance power cable lines, and it will also increase equipment and installation costs, reducing the cost advantage of this type of temperature monitoring system. In addition, the above-mentioned temperature monitoring system usually uses temperature-sensitive cables or temperature-sensitive optical fibers as its temperature sensors, which need to be laid on the surface of the power cable. The equipment installation is relatively cumbersome, and it is less applicable to the technical transformation and upgrading of the old power cable temperature monitoring system. At the same time, the above-mentioned two temperature sensors are difficult to achieve for the distributed and precise temperature measurement of the intermediate joints of the power cables. Summary of the invention

[0004] The purpose of the present invention is to provide a distributed power cable infrared temperature monitoring system based on a Zigbee peer-to-peer network to solve the above technical problems.

[0005] The present invention provides a power cable infrared temperature monitoring system based on a Zigbee peer-to-peer network, comprising at least one power cable to be tested, at least two non-contact wireless temperature measurement units, a communication coordinator, a controller and a background monitoring system server; The non-contact wireless temperature measurement unit adopts a non-contact infrared temperature measurement sensor, which is installed near the power cable to be measured, and is used to measure the outer surface temperature of the power cable to be measured and transmit the temperature data; A non-contact infrared temperature measuring unit communicates with the next non-contact infrared temperature measuring unit and the communication coordinator in sequence to form a Zigbee network. After the first non-contact wireless temperature measuring unit detects the outer surface temperature of the measured power cable, it transmits the temperature data to the next non-contact wireless temperature measuring unit through the Zigbee network. The next non-contact wireless temperature measuring unit acts as a communication router, integrates the temperature data collected by the previous non-contact wireless temperature measuring unit and the temperature data collected by itself, and transmits it to the communication coordinator through the Zigbee network; the Zigbee network is in a peer-to-peer connection state; The communication coordinator, controller, and background system server are connected in sequence through an RJ45 communication module to form a communication network for data transmission, temperature data display, and data abnormality alarm.

[0006] Furthermore, the non-contact wireless temperature measurement unit is installed at a distance of 0.8-1.5 m from the power cable to be measured.

[0007] Furthermore, the non-contact wireless temperature measurement unit includes an infrared temperature measurement sensor module, an RFD module, a microprocessor unit and a battery power supply module. The infrared temperature measurement sensor module is used to transmit the detected infrared temperature signal to the RFD module after being processed by the microprocessor unit. The RFD module is used to transmit the processed temperature data to the next communication node through the Zigbee network.

[0008] Furthermore, the communication coordinator includes an FFD module, a coordinator microprocessor module, a coordinator external power supply module, and a coordinator RJ45 communication module. The FFD module, the coordinator microprocessor module, and the coordinator RJ45 communication module are connected in sequence, and the coordinator RJ45 communication module is connected to the RFD module.

[0009] Furthermore, the controller includes a display module, a controller microprocessor module, a controller RJ45 communication module, an alarm module, and a controller external power supply module. The controller RJ45 communication module is connected to the FFD module, and the controller microprocessor module is connected to the display module controller RJ45 communication module, the alarm module, and the controller external power supply module.

[0010] Furthermore, the number of Zigbee network nodes in the communication coordinator in the system is at least 1 and at most 255; the number of Zigbee network nodes in the non-contact wireless temperature measurement unit is at least 1 and at most 255.

[0011] Through the above scheme, through the distributed power cable infrared temperature monitoring system based on Zigbee peer-to-peer network, the non-contact infrared temperature measurement technology can be used to achieve non-contact installation of power cable joints. The equipment installation is relatively easy, and the technical upgrade of power cable temperature monitoring in old power cable trenches is relatively friendly; at the same time, due to the use of Zigbee communication technology, wireless distributed and accurate temperature monitoring of power cable joints can be achieved. At the same time, the peer-to-peer network structure has the same characteristics as the star network structure, such as a wider range of applicable scenarios, free networking, and flexible addition of monitoring points according to actual on-site needs within the conditions of the farthest communication distance and the maximum number of connections. At the same time, the effective communication range of the temperature monitoring system can be greatly increased; non-contact infrared measurement can achieve: the alarm temperature can be set and adjusted within the range of -40℃ to 140℃. The differential temperature alarm meets the heating rate requirements of 10℃ / min, 20℃ / min, and 30℃ / min; the effective communication range of the Zigbee peer-to-peer communication network can meet most power cable temperature monitoring needs, and the maximum data communication rate between each non-contact wireless temperature measurement unit and between the non-contact wireless temperature measurement unit and the communication coordinator can be 250kbps. Each non-contact wireless temperature measurement unit can support up to 255 non-contact wireless temperature measurement units for communication connection, and each router FFD can support up to 254 terminal FFDs for communication connection.

[0012] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the system structure diagram of the present invention.

[0014] Figure 2 It is a structural schematic diagram of the non-contact wireless temperature measurement unit of the present invention.

[0015] Figure 3 It is an operation flow chart of the non-contact wireless temperature measurement unit of the present invention.

[0016] Figure 4 It is a schematic diagram of the structure of the communication coordinator of the present invention.

[0017] Figure 5 It is a schematic diagram of the structure of the controller of the present invention.

[0018] Numbers in the figure: 1-power cable under test; 2-contactless wireless temperature measurement unit; 3-coordinator FFD; 4-controller; 5-backend server; 21-infrared temperature sensor module; 22-microprocessor unit; 23-RFD module; 24-battery power supply module; 31-FFD module; 32-coordinator microprocessor module; 33-coordinator RJ45 communication module; 34-coordinator external power supply module; 41-display module; 42-controller microprocessor module; 43-controller RJ45 communication module; 44-alarm module; 45-controller external power supply module. DETAILED DESCRIPTION

[0019] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0020] Ginseng Figure 1 As shown, this embodiment provides a distributed power cable infrared temperature monitoring system based on a Zigbee peer-to-peer network, including at least one power cable 1 to be tested, at least two non-contact wireless temperature measurement units 2, a communication coordinator 3, a controller 4, and a background monitoring system server 5.

[0021] Specifically, the non-contact wireless temperature measurement unit 2 is installed at a distance of 0.8-1.5 m from the power cable 1. In this embodiment, the non-contact wireless temperature measurement unit 2 adopts a non-contact infrared temperature measurement sensor. Compared with traditional temperature sensors, it can achieve distributed and wireless installation, low cost, less installation difficulty, low cost, small size and other characteristics. At the same time, it can also realize functions such as accurate temperature measurement of power cable joints.

[0022] Among them, a non-contact infrared temperature measurement unit 2, another non-contact infrared temperature measurement unit 2, and a communication coordinator 3 are connected in sequence to form a Zigbee network, forming a peer-to-peer Zigbee network (the Zigbee network in the system is in a peer-to-peer connection state) to achieve corresponding data transmission and control; the communication coordinator 3, the controller 4, and the background system server 5 are connected in sequence through RJ45 to form a communication network for corresponding control and data transmission.

[0023] Specifically, after the first non-contact wireless temperature measurement unit 2 detects the outer surface temperature of the measured power cable 1, it transmits the temperature data to the next non-contact wireless temperature measurement unit 2 through the Zigbee network. The next non-contact wireless temperature measurement unit 2 acts as a communication router, integrates the temperature data collected by the previous non-contact wireless temperature measurement unit 2 with the temperature data collected by itself, and transmits it to the communication coordinator 3 through the Zigbee network.

[0024] Among them, several non-contact wireless temperature measurement units can be set, and they are installed and connected to the communication in the above manner. In this embodiment, a maximum of 255 non-contact wireless temperature measurement units 2 can be set, and the number of Zigbee network nodes in the system is at least 1 and at most 255. They are installed in the above manner and connected to the communication coordinator 3 for communication. The non-contact wireless temperature measurement unit 2 is used to measure the outer surface temperature of the power cable and transmit the temperature data. The communication coordinator 3 is used to manage and control the Zigbee communication network, receive the temperature data of the non-contact wireless infrared temperature measurement unit 2, and transmit the temperature data to the controller 4.

[0025] Specifically, after the communication coordinator 3 integrates the temperature data of all non-contact wireless temperature measurement units 2, it transmits the data to the controller 4 via RJ45. The controller 4 can realize system control and management, data analysis, display of the outer surface temperature of the measured power cable, and abnormal temperature data alarm.

[0026] Specifically, the controller 4 transmits data to the background system server 5 via RJ45, and the background system server can realize human-computer interaction, system status monitoring, display of the outer surface temperature of the measured power cable, abnormal temperature data alarm, and management and storage of temperature data.

[0027] Ginseng Figure 2-3 As shown, the non-contact wireless temperature measurement unit 2 includes an infrared temperature measurement sensor module 21, an RFD (reduced functional device, RFD, Zigbee's simplified functional device) module 22, a microprocessor unit 23, and a battery power supply module 24. The RFD module in the non-contact wireless infrared temperature measurement unit can be used as a communication terminal or a communication router. When the FFD module in the non-contact wireless infrared temperature measurement unit is used as a communication terminal, the microprocessor unit receives the reference source signal of the infrared temperature measurement sensor module and transmits the temperature data to the adjacent non-contact wireless infrared temperature measurement unit through the Zigbee network; when the RFD module in the contact wireless infrared temperature measurement unit is used as a communication router, the microprocessor unit receives the reference source signal of the infrared temperature measurement sensor module and integrates it with the data of the previous contact wireless infrared temperature measurement unit, and transmits the data to the communication coordinator unit through the Zigbee network.

[0028] Specifically, the infrared temperature sensor module 21 detects the outer surface temperature of the power cable through infrared temperature measurement technology, and converts the detected infrared temperature signal into a voltage signal to form a reference source after data compensation, digital-to-analog conversion, etc., and transmits it to the microprocessor unit 23. The microprocessor unit 23 parses and processes the temperature data accordingly and transmits it to the RFD module 22. The RFD module 22 transmits the temperature data to the next communication node through the Zigbee peer-to-peer network.

[0029] like Figure 4 As shown, the communication coordinator 3 includes a FFD (fully functional device, FFD, a Zigbee fully functional device) module 31, a coordinator microprocessor module 32, a coordinator external power supply module 33, and a coordinator RJ45 communication module 34. The above modules are all connected through circuits.

[0030] The RFD module and the FFD module include a Zigbee communication module and a Zigbee antenna. The Zigbee communication network adopts the IEEE 802.15.4 radio frequency standard and a 2.4G physical layer.

[0031] like Figure 5 As shown, the controller 4 includes a display module 41, a controller microprocessor module 42, a controller RJ45 communication module 43, an alarm module 44 and a controller external power supply module 45, and all modules are connected through circuits.

[0032] The controller 4 can display the temperature monitoring information of the outer surface of the power cable and the battery status information of each non-contact wireless infrared temperature measurement unit. When the temperature acquisition module detects abnormal temperature, the controller and the background server can realize the abnormal temperature alarm function, wherein the controller and the background system server can realize the sound alarm and display alarm.

[0033] After the communication coordinator 3 successfully communicates with the controller 4 and the background system server 5, it will initialize the Zigbee network and then automatically build a communication network. At this time, the communication coordinator 3 will enter the network monitoring state, and after receiving the network access application of the non-contact wireless temperature measurement unit 2 with a pre-stored ID number, it will enter the communication state. After parsing and processing the data, it will be transmitted to the controller 4. The monitoring frequency of the communication coordinator 3 and the network access frequency of the non-contact wireless temperature measurement unit 2 can be set by software and should be greater than 1 time / second.

[0034] The distributed power cable infrared temperature monitoring system based on Zigbee peer-to-peer network has the following technical effects: 1. The traditional power cable temperature monitoring system based on Zigbee star network structure is difficult to realize long-distance power cable line temperature monitoring. The present invention can realize long-distance, distributed, and multi-point temperature monitoring functions.

[0035] 2. In view of the fact that thermistor temperature measurement technology and temperature-sensitive optical fiber temperature measurement technology cannot achieve targeted and accurate temperature measurement of the intermediate joints of power cables, the present invention can achieve non-contact and accurate temperature measurement of power cable joints.

[0036] 3. In view of the fact that the existing power cable temperature measurement technology requires power supply and communication lines and the installation is relatively complicated, the patent of this invention can realize distributed installation without the need for power supply and signal transmission lines.

[0037] 4. In view of the fact that the temperature measuring unit of the existing power cable temperature measurement technology requires an external power supply, the present invention can realize temperature monitoring without the need for a power supply line, and has lower power consumption, and can meet the requirements of long-term maintenance-free operation.

[0038] 5. In view of the fact that the signal acquisition and transmission unit of the existing power cable temperature measurement technology requires a communication line, the present invention can realize that the signal acquisition and transmission unit has a wireless transmission function and has low power consumption, and can achieve fast and flexible networking and communication.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the technical principles of the present invention, and these improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. The power cable infrared temperature monitoring system based on Zigbee peer-to-peer network is characterized by: It comprises at least one power cable to be tested (1), at least two non-contact wireless temperature measurement units (2), a communication coordinator (3), a controller (4) and a background monitoring system server (5); The non-contact wireless temperature measurement unit (2) uses a non-contact infrared temperature measurement sensor, which is installed near the power cable to be measured and is used to measure the outer surface temperature of the power cable to be measured (1) and transmit the temperature data; A non-contact infrared temperature measuring unit (2) is connected to the next non-contact infrared temperature measuring unit (2) and the communication coordinator (3) in sequence to form a Zigbee network. After the first non-contact wireless temperature measuring unit (2) detects the outer surface temperature of the measured power cable (1), the temperature data is transmitted to the next non-contact wireless temperature measuring unit (2) through the Zigbee network. The next non-contact wireless temperature measuring unit (2) acts as a communication router, integrates the temperature data collected by the previous non-contact wireless temperature measuring unit (2) and the temperature data collected by itself, and transmits the data to the communication coordinator (3) through the Zigbee network. The Zigbee network is in a peer-to-peer connection state. The communication coordinator (3), the controller (4), and the background system server (5) are connected in sequence via an RJ45 communication module to form a communication network for data transmission, temperature data display, and data abnormality alarm.

2. The power cable infrared temperature monitoring system based on Zigbee peer-to-peer network according to claim 1 is characterized in that: The non-contact wireless temperature measurement unit (2) is installed at a distance of 0.8-1.5 m from the power cable (1) to be measured.

3. The power cable infrared temperature monitoring system based on Zigbee peer-to-peer network according to claim 2 is characterized in that: The non-contact wireless temperature measurement unit (2) comprises an infrared temperature measurement sensor module (21), an RFD module (22), a microprocessor unit (23) and a battery power supply module (24); the infrared temperature measurement sensor module (21) is used to process the detected infrared temperature signal through the microprocessor unit (23) and transmit it to the RFD module (22); the RFD module (22) is used to transmit the processed temperature data to the next communication node through a Zigbee network.

4. The power cable infrared temperature monitoring system based on Zigbee peer-to-peer network according to claim 3 is characterized in that: The communication coordinator (3) comprises an FFD module (31), a coordinator microprocessor module (32), a coordinator external power supply module (33), and a coordinator RJ45 communication module (34); the FFD module (31), the coordinator microprocessor module (32), and the coordinator RJ45 communication module (34) are connected in sequence; and the coordinator RJ45 communication module (34) is connected to the RFD module (22).

5. The power cable infrared temperature monitoring system based on Zigbee peer-to-peer network according to claim 3 is characterized in that: The controller (4) comprises a display module (41), a controller microprocessor module (42), a controller RJ45 communication module (43), an alarm module (44), and a controller external power supply module (45); the controller RJ45 communication module (43) is connected to the FFD module (31); the controller microprocessor module (42) is connected to the display module (41), the controller RJ45 communication module (43), the alarm module (44), and the controller external power supply module (45).

6. The power cable infrared temperature monitoring system based on Zigbee peer-to-peer network according to claim 1, characterized in that: The number of Zigbee network nodes in the communication coordinator in the system is at least 1 and at most 255; the number of Zigbee network nodes in the non-contact wireless temperature measurement unit is at least 1 and at most 255.

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