CN221099893U - Distributed power cable infrared temperature monitoring system based on Zigbee star network - Google Patents
Distributed power cable infrared temperature monitoring system based on Zigbee star network Download PDFInfo
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- CN221099893U CN221099893U CN202322399052.8U CN202322399052U CN221099893U CN 221099893 U CN221099893 U CN 221099893U CN 202322399052 U CN202322399052 U CN 202322399052U CN 221099893 U CN221099893 U CN 221099893U
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Abstract
The utility model relates to a distributed power cable infrared temperature monitoring system based on a Zigbee star network, which comprises at least one power cable to be tested, at least two non-contact wireless temperature measuring units, a communication coordinator, a controller and a background monitoring system server, wherein the power cable to be tested is connected with the communication coordinator; the non-contact wireless temperature measurement unit adopts a non-contact infrared temperature measurement sensor and is arranged near a power cable to be measured; the plurality of non-contact wireless temperature measuring units are respectively communicated with the communication coordinator through a Zigbee network; the Zigbee network is in a star-shaped connection state; the communication coordinator, the controller and the background system server are sequentially connected through the RJ45 communication module to form a communication network. The utility model can carry out targeted accurate temperature measurement on the middle joint of the power cable, and enhances the temperature monitoring capability of the power cable temperature monitoring system on the weak link of power transmission of the power cable. Meanwhile, the method has the characteristics of low power consumption, flexible networking, low maintenance cost, low installation difficulty and low installation cost.
Description
Technical Field
The utility model relates to the technical field of power cable temperature monitoring, in particular to a distributed power cable infrared temperature monitoring system based on a Zigbee star network.
Background
At present, the mature technology used in the power cable temperature monitoring mainly comprises a Wen Lapian method, a lead joint temperature measuring method, a contact type electric signal temperature measuring method, a distributed optical fiber temperature monitoring method, a fiber grating temperature measuring method, a thermal infrared imager and the like. Temperature measurement mechanisms according to the related art methods can be broadly classified into three main categories: thermistor type, temperature sensing optical fiber type, and infrared temperature measurement type.
The thermistor type temperature measurement technical method comprises the following steps: according to the difference of temperature reaction principles, the thermistor type temperature measurement technical method can be divided into two technical routes: linear temperature sensing and differential temperature sensing. The linear temperature sensing may be called thermocouple type, the differential temperature type may be called resistance type, and the fixed temperature type may be called fixed point type. However, the principle is almost the same, and the judgment is carried out by the change of the resistance value of the thermosensitive material along with the temperature. The temperature sensing cable is used for measuring the temperature change of a certain section of detection area and is generally composed of two heat-sensitive material wires, and the insulation resistance between the two heat-sensitive material wires is rapidly changed along with the change of the ambient temperature, so that the ambient temperature can be measured by measuring the insulation resistance value. The technology is relatively mature and low in cost, but because the monitoring mechanism is limited, fixed-point and accurate temperature monitoring cannot be achieved, the distributed temperature measurement requirement cannot be met, and the cable connector cannot be subjected to targeted accurate temperature measurement.
The temperature sensing optical fiber type technical method comprises the following steps: the temperature sensing optical fiber type technical method can be divided into: the principle of the Bragg grating, the Brillouin scattering or the Raman scattering is based on the fixed relation between the propagation of light in the optical fiber and the temperature, and the outside temperature is monitored by using an optical method, so that the three methods have different advantages and disadvantages only according to different carriers and algorithms for extracting signals. Compared with the thermistor type temperature measurement technology, the technology is more accurate and can realize the communication signal transmission function at the same time. But like the thermistor type temperature measurement technology, the temperature measurement technology cannot realize targeted accurate temperature measurement of the cable joint.
The infrared temperature measurement technical method comprises the following steps: the infrared temperature measurement type technical method can be divided into infrared temperature measurement and infrared imaging according to different functional implementation approaches, and the principle is based on blackbody radiation law, and infrared radiation energy emitted by a power cable is detected and converted into an electrical signal, so that temperature monitoring is realized.
At present, most of infrared temperature measurement technical methods need to be connected with signal and power transmission lines, so that the corresponding equipment cost is increased, the construction difficulty is increased, and the use scene is severely limited. The infrared imaging technology requires a high-power supply device, and the probe is relatively precise, so that the long-time maintenance-free work requirement cannot be met.
Meanwhile, the thermistor type and the temperature sensing optical fiber type are required to be laid in an S-shaped mode on the surface of the power cable, the requirements of the existing power cable trench on the improvement of the temperature monitoring technology are difficult to meet, and the construction difficulty is very high. In addition, most of the current technical methods are required to be powered by wires and transmitted by signals, so that the installation is complicated, and the application scene is less.
Disclosure of utility model
The utility model aims to provide a distributed power cable infrared temperature monitoring system based on a Zigbee star network so as to solve the technical problems.
The utility model provides a distributed power cable infrared temperature monitoring system based on a Zigbee star network, which comprises at least one tested power cable, at least two non-contact wireless temperature measuring units, a communication coordinator, a controller and a background monitoring system server, wherein the communication coordinator is connected with the power cable;
The non-contact wireless temperature measurement unit adopts a non-contact infrared temperature measurement sensor, is arranged near the power cable to be measured, and is used for measuring the temperature of the outer surface of the power cable to be measured and transmitting temperature data;
The non-contact wireless temperature measurement units are respectively communicated with the communication coordinator through a Zigbee network; the Zigbee network is in a star-shaped connection state;
The communication coordinator, the controller and the background system server are sequentially connected through the RJ45 communication module to form a communication network for data transmission, temperature data display and data abnormality warning.
Further, the non-contact wireless temperature measurement unit is arranged at a position 0.8-1.5m away from the power cable to be measured.
Further, the non-contact wireless temperature measurement unit comprises an infrared temperature measurement sensor module, an RFD module, a microprocessor unit and a battery power supply module, wherein the infrared temperature measurement sensor module is used for transmitting detected infrared temperature signals to the RFD module after being processed by the microprocessor unit, and the RFD module is used for transmitting processed temperature data to the communication coordinator through a Zigbee network.
Further, the communication coordinator comprises an FFD module, a coordinator microprocessor module, a coordinator external power supply module and a coordinator RJ45 communication module, wherein the FFD module, the coordinator microprocessor module and the coordinator RJ45 communication module are sequentially connected, and the coordinator RJ45 communication module is connected with the RFD module.
Further, the controller comprises a display module, a controller microprocessor module, a controller RJ45 communication module, an alarm module and a controller external power supply module, wherein the controller RJ45 communication module is connected with the FFD module, and the controller microprocessor module is connected with the display module, the controller RJ45 communication module, the alarm module and the controller external power supply module.
Further, the number of Zigbee network nodes in the system is at least 1 and at most 255.
By means of the scheme, through the distributed power cable infrared temperature monitoring system based on the Zigbee star network, targeted accurate temperature measurement can be carried out on the power cable intermediate joint, and the temperature monitoring capability of the power cable temperature monitoring system on the power cable electric energy transmission weak link is enhanced. Meanwhile, the Zigbee wireless communication technology is applied, so that the system has the characteristics of low power consumption, flexible networking and the like, has lower maintenance cost, lower equipment cost, lower installation difficulty and installation cost, is suitable for multi-scene application such as power cable tunnels, ditches, shafts and the like, greatly improves the engineering feasibility of technical upgrading and reconstruction of the existing power cable temperature monitoring equipment, and ensures safe and stable operation of the power cable.
The foregoing description is only an overview of the present utility model, and is intended to provide a better understanding of the present utility model, as it is embodied in the following description, with reference to the preferred embodiments of the present utility model and the accompanying drawings.
Drawings
FIG. 1 is a schematic diagram of a system architecture of the present utility model;
FIG. 2 is a schematic diagram of a non-contact wireless temperature measurement unit according to the present utility model;
FIG. 3 is a flow chart of the operation of the non-contact wireless temperature measurement unit of the present utility model;
FIG. 4 is a schematic diagram of a communication coordinator according to the present utility model;
FIG. 5 is a schematic diagram of a controller according to the present utility model;
fig. 6 is a Zigbee networking flow chart of the present utility model.
Reference numerals in the drawings:
1-a power cable to be tested; 2-a non-contact wireless temperature measurement unit; 3-coordinator FFD; 4-a controller; 5-a background server;
21-an infrared temperature sensor module; a 22-microprocessor unit; a 23-RFD module; a 24-battery powered module;
a 31-FFD module; a 32-coordinator microprocessor module; 33-coordinator RJ45 communication module; 34-coordinator external power module;
41-a display module; 42-a controller microprocessor module; 43-a controller RJ45 communication module; 44-an alarm module; 45-a controller external power supply module.
Detailed Description
The following describes in further detail the embodiments of the present utility model with reference to the drawings and examples. The following examples are illustrative of the utility model and are not intended to limit the scope of the utility model.
Referring to fig. 1, the present embodiment provides a distributed power cable infrared temperature monitoring system based on a Zigbee star network, which includes at least one power cable 1 to be tested, at least two non-contact wireless temperature measuring units 2, a communication coordinator 3, a controller 4, and a background monitoring system server 5.
Specifically, the non-contact wireless temperature measuring unit 2 is arranged at a position 0.8-1.5m away from the power cable 1. In this embodiment, the non-contact wireless temperature measuring unit 2 adopts a non-contact infrared temperature measuring sensor. Compared with the traditional temperature sensor, the temperature sensor can realize distributed and wireless installation, and has the characteristics of lower cost, lower installation difficulty, lower cost, smaller volume and the like. Meanwhile, the functions of precisely measuring the temperature of the power cable joint and the like can be realized.
The non-contact wireless temperature measurement units 2 are respectively in communication connection with the communication coordinator 3 through a Zigbee network to form a star-shaped Zigbee network (the Zigbee network in the system is in a star-shaped connection state), so that corresponding data transmission and control are realized; the communication coordinator 3 is sequentially connected with the controller 4 and the background system server 5 through RJ45 to form a communication network for corresponding control and data transmission.
The number of the Zigbee network nodes in the system is at least 1, and at most 255, and the contactless wireless temperature measurement unit 2 can be set up to 255, and is installed and connected with the communication coordinator 3 in a communication manner as described above. The non-contact wireless temperature measurement unit 2 is used for measuring the temperature of the outer surface of the power cable and transmitting temperature data. The communication coordinator 3 is used for managing and controlling the Zigbee communication network, receiving the temperature data of the non-contact wireless infrared temperature measurement unit 2, and transmitting the temperature data to the controller 4.
Specifically, after the communication coordinator 3 integrates the temperature data of all the non-contact wireless temperature measurement units 2, the data is transmitted to the controller 4 through the RJ45, and the controller 4 can realize system control and management, data analysis, display of the temperature of the outer surface of the measured power cable and abnormal alarm of the temperature data.
Specifically, the controller 4 transmits data to the background system server 5 through the RJ45, and the background system server can realize man-machine interaction, system state monitoring, display of the measured power cable outer surface temperature, abnormal alarm of the temperature data and management and storage of the temperature data.
Referring to fig. 2-3, the non-contact wireless temperature measuring unit 2 includes an infrared temperature measuring sensor module 21, RFD (reduced functional device, RFD, simplified function device of Zigbee) module 22, a microprocessor unit 23, and a battery power module 24.
Specifically, the infrared temperature measurement sensor module 21 detects the temperature of the outer surface of the power cable through an infrared temperature measurement technology, converts the detected infrared temperature signal after processing such as data compensation and digital-to-analog conversion into a voltage signal to form a reference source and transmit the reference source to the microprocessor unit 23, the microprocessor unit 23 correspondingly analyzes and processes the temperature data and then transmits the temperature data to the RFD module 22, and the RFD module 22 transmits the temperature data to the communication coordinator 3 through a Zigbee star network.
As shown in fig. 4, the communication coordinator 3 includes an FFD (fully functional device, FFD, one Zigbee full function device) module 31, a coordinator microprocessor module 32, a coordinator external power module 33, and a coordinator RJ45 communication module 34. The modules are all connected through a circuit.
The RFD module and the FFD module comprise a Zigbee communication module and a Zigbee antenna, and the Zigbee communication network adopts an IEEE 802.15.4 radio frequency standard and a 2.4G physical layer.
As shown in fig. 5, 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, all of which are connected by a circuit.
The controller 4 can display the monitoring information of the outer surface temperature of the power cable and the state of charge information of each non-contact wireless infrared temperature measuring unit battery. When the temperature acquisition module monitors temperature abnormality, the controller and the background server can both realize a temperature abnormality alarming function, wherein the controller and the background system server can both realize sound alarming and display alarming.
Referring to fig. 6, after successful communication with the controller 4 and the background system server 5, the communication coordinator 3 performs Zigbee network initialization and then automatically constructs a communication network. At this time, the communication coordinator 3 enters a network monitoring state, and enters a communication state after receiving a network access request of the non-contact wireless temperature measurement unit 2 storing an ID number in advance. And after parsing and processing the data, transmits it to the controller 4. The monitoring frequency of the communication coordinator 3 and the network access frequency of the non-contact wireless temperature measuring unit 2 can be set by software, and the monitoring frequency is larger than 1 time/second.
The distributed power cable infrared temperature monitoring system based on the Zigbee star network has the following technical effects:
1. Aiming at the situation that the thermistor type temperature measurement technology and the temperature sensing optical fiber type temperature measurement technology cannot realize the targeted accurate temperature measurement of the power cable intermediate connector, the utility model can realize the non-contact accurate temperature measurement of the power cable connector.
2. Aiming at the situations that the existing power cable temperature measurement technology needs power supply and communication lines, is complex to install and the like, the distributed installation can be realized, and the power supply and signal transmission lines are not needed.
3. Aiming at the condition that the temperature measuring unit needs an external power supply for power supply in the existing power cable temperature measuring technology, the utility model can realize temperature monitoring without a power supply line, has lower power consumption and can realize long-time maintenance-free work requirement.
4. Aiming at the condition that the signal acquisition and transmission unit needs a communication line in the existing power cable temperature measurement technology, the utility model can realize that the signal acquisition and transmission unit has a wireless transmission function, has lower power consumption and can realize quick and flexible networking and communication.
The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, and it should be noted that it is possible for those skilled in the art to make several improvements and modifications without departing from the technical principle of the present utility model, and these improvements and modifications should also be regarded as the protection scope of the present utility model.
Claims (6)
1. The distributed power cable infrared temperature monitoring system based on the Zigbee star network is characterized by comprising at least one power cable (1) to be tested, at least two non-contact wireless temperature measuring units (2), a communication coordinator (3), a controller (4) and a background monitoring system server (5);
The non-contact wireless temperature measurement unit (2) adopts a non-contact infrared temperature measurement sensor, is arranged near the power cable to be measured, and is used for measuring the temperature of the outer surface of the power cable to be measured (1) and transmitting temperature data;
The non-contact wireless temperature measurement units (2) are respectively communicated with the communication coordinator (3) through a Zigbee network; the Zigbee network is in a star-shaped connection state;
the communication coordinator (3), the controller (4) and the background system server (5) are sequentially connected through RJ45 communication modules to form a communication network for data transmission, temperature data display and data abnormality warning.
2. The distributed power cable infrared temperature monitoring system based on the Zigbee star network according to claim 1, wherein the non-contact wireless temperature measuring unit (2) is installed at a position 0.8-1.5m away from the measured power cable (1).
3. The distributed power cable infrared temperature monitoring system based on the Zigbee star network according to claim 2, wherein the non-contact wireless temperature measuring unit (2) includes an infrared temperature measuring sensor module (21), an RFD module (22), a microprocessor unit (23) and a battery power module (24), the infrared temperature measuring sensor module (21) is configured to process a detected infrared temperature signal by the microprocessor unit (23) and then transmit the processed infrared temperature signal to the RFD module (22), and the RFD module (22) is configured to transmit the processed temperature data to the communication coordinator (3) through the Zigbee network.
4. A distributed power cable infrared temperature monitoring system based on a Zigbee star network according to claim 3, wherein the communication coordinator (3) includes an FFD module (31), a coordinator microprocessor module (32), a coordinator external power 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 sequentially connected, and the coordinator RJ45 communication module (34) is connected with the RFD module (22).
5. The Zigbee star network based distributed power cable infrared temperature monitoring system according to claim 4, wherein 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), the controller RJ45 communication module (43) is connected with the FFD module (31), and the controller microprocessor module (42) is connected with the display module (41), the controller RJ45 communication module (43), the alarm module (44), and the controller external power supply module (45).
6. The distributed power cable infrared temperature monitoring system based on a Zigbee star network according to claim 1, wherein the number of Zigbee network nodes in the system is at least 1 and at most 255.
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| CN202322399052.8U CN221099893U (en) | 2023-09-05 | 2023-09-05 | Distributed power cable infrared temperature monitoring system based on Zigbee star network |
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| CN202322399052.8U CN221099893U (en) | 2023-09-05 | 2023-09-05 | Distributed power cable infrared temperature monitoring system based on Zigbee star network |
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