阅读说明：本技术 一种电力电缆无线测温系统 (Power cable wireless temperature measurement system ) 是由 郑梁 龚超 倪扬扬 于 2021-05-27 设计创作，主要内容包括：本发明具体涉及一种电力电缆无线测温系统,包括多个内置测温节点的测温装置,每个测温节点以无线的方式接入系统网关,所述系统网关以无线的方式与监控主机相连接；所述测温装置设置在电缆上,用于检测电缆温度信息并发送到系统网关；所述系统网关用于获取各个测温节点采集的温度信息并发送给监控主机；所述监控主机用于检测温度信息异常时发出报警信息。本发明安全可靠,降低了人力维护成本及保障了人身安全。(The invention relates to a power cable wireless temperature measurement system, which comprises a plurality of temperature measurement devices with built-in temperature measurement nodes, wherein each temperature measurement node is wirelessly connected to a system gateway, and the system gateway is wirelessly connected with a monitoring host; the temperature measuring device is arranged on the cable and used for detecting the temperature information of the cable and sending the temperature information to the system gateway; the system gateway is used for acquiring temperature information acquired by each temperature measuring node and sending the temperature information to the monitoring host; the monitoring host is used for sending alarm information when detecting temperature information is abnormal. The invention is safe and reliable, reduces the manpower maintenance cost and ensures the personal safety.)

1. A power cable wireless temperature measurement system is characterized by comprising a plurality of temperature measurement devices with built-in temperature measurement nodes, wherein each temperature measurement node is wirelessly connected to a system gateway, and the system gateway is wirelessly connected with a monitoring host; the temperature measuring device is arranged on the cable and used for detecting the temperature information of the cable and sending the temperature information to the system gateway; the system gateway is used for acquiring temperature information acquired by each temperature measuring node and sending the temperature information to the monitoring host; the monitoring host is used for sending alarm information when detecting the temperature information is abnormal; the temperature measuring device is of a watchband type structure and comprises a watchband main body S1, a main body right watchband S2, a main body left watchband S3, a main body top cover S8, a hole S4 formed in the center of the top cover S8, and a rectangular small hole S5 formed in one surface of the main body adjacent to the right side of the right watchband S2, wherein the left watchband S3 is provided with an annular small hole S6 close to the left, a temperature measuring node is arranged in the main body S1, the right watchband S2 and the left watchband S3 can be tightly connected together, and the temperature measuring device is tightly arranged on a cable;

the temperature measuring node at least comprises a single chip microcomputer 1, a temperature sensor 2, a power supply module 3 and a wireless communication module 4, wherein the temperature sensor 2 can extend out of an opening S4;

the system gateway at least comprises a singlechip 5, a storage module 6, a wireless communication module 7, an RS485 communication module 8, a 4G module 9 and a power module 10.

2. The power cable wireless temperature measurement system of claim 1, wherein the surface of the right watchband S12 has trapezoidal anti-slip patterns, and the center of the top cover S8 is provided with a small hole S4 with a diameter of 0.5 cm; the left watchband S3 is provided with a ring-shaped small hole S6 with a diameter of 1cm at a position 5cm away from the main body.

3. The power cable wireless temperature measurement system according to claim 1, wherein the chip microcomputer 1 in the temperature measurement node is an STM32L011F4 chip.

4. The power cable wireless temperature measurement system of claim 1, wherein the wireless communication module 4 in the temperature measurement node is a LoRa communication module, and a chip thereof is SX 1278.

5. The power cable wireless temperature measurement system of claim 1, wherein a PIC32MM0064 chip is selected as a singlechip 5 in the system gateway.

6. The power cable wireless temperature measurement system of claim 1, wherein the 4G module 9 in the system gateway is a TAS-LTE-363 model.

7. The power cable wireless temperature measurement system of claim 1, wherein the RS485 communication module 8 in the system gateway has a chip MAX 3485.

8. The power cable wireless temperature measurement system according to claim 1, wherein the wireless communication module 7 in the system gateway is a LoRa communication module that is the same as the temperature measurement node.

9. The power cable wireless temperature measurement system of claim 1, wherein the monitoring host comprises an android APP11 and an internet of things cloud platform 12.

Technical Field

The invention belongs to the technical field of cables, and particularly relates to a power cable wireless temperature measurement system.

Background

With the industrial development and scientific progress, the demand of society for electric power is greatly increased. Therefore, the development of the power industry is more rapid, and meanwhile, the total power consumption of China is continuously increased, so that a plurality of potential safety hazards exist in a power system, the potential safety hazards are not improved, and power safety accidents occur in daily life, so that the personal safety and property loss of people are directly threatened. Therefore, ensuring safe, reliable and stable operation of the power system is a problem which needs to be solved at present.

As a key device for transmitting electric energy, a power cable is used, and during the operation of a power system, if the power cable is in an overload state for a long time, i.e. in a state of high voltage and high current, the surface temperature of the power cable is rapidly increased. Especially in places where the cable has poor heat dissipation, such as where the lines are connected, the corners are turned, the wiring is more compact, etc. The abnormal temperature of the line accelerates the aging, so that the contact resistance is increased, the leakage current is increased, the temperature is forced to rise, a vicious circle is formed, the line is carbonized in the process, insulation breakdown is possibly caused, and a fire disaster is caused. Even if the power system is put into a crash, losses that are difficult to estimate are incurred.

In summary, the abnormal operation of the power cable is often accompanied by the variation of the surface temperature. Therefore, the surface temperature of the power cable is monitored in real time, hot spots can be found timely, workers can go to the site for repair at the first time, electrical accidents are avoided, and loss is reduced.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention designs the power cable wireless temperature measurement system which can monitor the surface temperature of the power cable in real time, support the display on a PC (personal computer) end and an android APP (application) interface and has the functions of temperature alarm, short message notification, curve display of historical alarm information and the like.

In order to solve the technical problems in the prior art, the technical scheme of the invention is as follows:

a power cable wireless temperature measurement system comprises a plurality of temperature measurement devices with built-in temperature measurement nodes, wherein each temperature measurement node is wirelessly connected to a system gateway, and the system gateway is wirelessly connected with a monitoring host; the temperature measuring device is arranged on the cable and used for detecting the temperature information of the cable and sending the temperature information to the system gateway; the system gateway is used for acquiring temperature information acquired by each temperature measuring node and sending the temperature information to the monitoring host; the monitoring host is used for sending alarm information when detecting the temperature information is abnormal; the temperature measuring device is of a watchband type structure and comprises a watchband main body S1, a main body right watchband S2, a main body left watchband S3, a main body top cover S8, a hole S4 formed in the center of the top cover S8, and a rectangular small hole S5 formed in one surface of the main body adjacent to the right side of the right watchband S2, wherein the left watchband S3 is provided with an annular small hole S6 close to the left, a temperature measuring node is arranged in the main body S1, the right watchband S2 and the left watchband S3 can be tightly connected together, and the temperature measuring device is tightly arranged on a cable;

the temperature measuring node at least comprises a single chip microcomputer 1, a temperature sensor 2, a power supply module 3 and a wireless communication module 4, wherein the temperature sensor 2 can extend out of an opening S4;

the system gateway at least comprises a singlechip 5, a storage module 6, a wireless communication module 7, an RS485 communication module 8, a 4G module 9 and a power module 10.

As a further improvement, the surface of the right watchband S12 is provided with a trapezoidal anti-slip pattern, the center of the top cover S8 is provided with a small hole S4, and the diameter of the hole is 0.5 cm; the left watchband S3 is provided with a ring-shaped small hole S6 with a diameter of 1cm at a position 5cm away from the main body.

As a further improvement scheme, the single chip microcomputer 1 in the temperature measuring node adopts an STM32L011F4 chip.

As a further improvement, the wireless communication module 4 in the temperature measurement node is a LoRa communication module, and the chip used by the LoRa communication module is SX 1278.

As a further improvement, the single chip microcomputer 5 in the system gateway selects a PIC32MM0064 chip.

As a further improvement, the 4G module 9 in the system gateway selects a TAS-LTE-363 model.

As a further improvement, the RS485 communication module 8 in the system gateway selects a chip as MAX 3485.

As a further improvement, the wireless communication module 7 in the system gateway selects an LoRa communication module which is the same as the temperature measurement node.

As a further improvement, the monitoring host includes an android APP11 and an internet of things cloud platform 12.

As a further improvement scheme, the temperature measuring device is of a watchband type structure, the watchband main body is of a rectangular structure, and the length, the width and the height of the watchband main body are suitable for the size of a temperature measuring node hardware circuit board. The center of the top cover of the watchband main body is provided with a small hole, so that the temperature sensor can conveniently extend out to be in contact with a power cable, and the temperature of the temperature sensor can be accurately measured. The surface of the watchband on the right side of the main body is attached with trapezoidal threads for fastening the watchband to prevent the watchband from falling off. The left end of the watchband on the left side of the main body is provided with an annular hole, and the aperture size of the annular hole is the same as the width of the watchband on the right side of the main body. A right watchband is used as a reference, and a rectangular small hole is formed in one surface of the watchband body adjacent to the right watchband body, so that the temperature measuring node is convenient to start and stop.

The temperature measurement node comprises a power supply module, a temperature sensor, a single chip microcomputer and a wireless communication module, wherein the temperature sensor and the wireless communication module are connected with the single chip microcomputer, the temperature sensor is used for collecting temperature data, and the wireless communication module is used for sending the data to a system gateway. And the power supply module supplies power to the whole temperature measuring node.

The system gateway comprises a single chip microcomputer, a storage module, a wireless communication module, an RS485 communication module, a 4G module and a power module, wherein the power module supplies power to the whole gateway, and the storage module, the wireless communication module, the 4G module and the RS485 communication module are all connected with the single chip microcomputer. The storage module is used for storing data information uploaded by the temperature measuring node, and the RS485 communication module is communicated with the monitoring host. The 4G module is used for forwarding data and accessing to the Internet of things cloud platform.

The monitoring host comprises an Internet of things cloud platform and an android APP. Android APP borrows an android industrial control screen, displays the running state of the current temperature measurement node in real time, and saves the alarm records. The Internet of things cloud platform can monitor the running state of the nodes in real time in multiple places.

Preferably, the temperature measuring node single chip microcomputer adopts an STM32L011F4 chip.

Preferably, the temperature measuring node temperature sensor adopts an NTC thermistor.

Preferably, the wireless communication module adopts a LoRa communication module.

Preferably, the power module of the temperature measuring node is powered by ER142503.6V lithium batteries.

Preferably, the system gateway single chip microcomputer adopts a PIC32MM0064 chip.

Preferably, the system gateway storage module adopts an AT24C02 chip.

Preferably, the system gateway wireless communication module is an LoRa communication module.

Compared with the prior art, the invention has the beneficial effects that: the temperature measuring node collects the temperature of the cable at regular time, compares the collected temperature data with the reported temperature difference set by the monitoring host, and reports the data if the temperature data exceeds a threshold value. The monitoring host can receive the data information of 250 nodes to the maximum extent, forwards the data to the monitoring host, accesses the cloud platform of the Internet of things through the 4G module, and forwards the data to the android APP through the RS485 communication module. The Internet of things cloud platform can log in at any time to check the running states of all current nodes, and the android APP interface updates the running states of the current nodes in real time, so that double monitoring of the incoming service and the remote service is guaranteed. The monitoring host has the function of recording historical temperature information, is drawn into a curve chart for display, can obviously find abnormal states, and when the temperature abnormal states occur, the Internet of things cloud platform can give an alarm in time and send alarm messages to the bound mobile phone. The invention has good reliability and perfect functions, does not need to manually check the working condition of the power cable, and effectively reduces the cost of manpower and material resources.

Drawings

Fig. 1 is a block diagram of the overall structure of a power cable wireless temperature measurement system according to an embodiment of the present invention.

Fig. 2 is a configuration diagram of a temperature measuring device in a power cable wireless temperature measuring system according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

On the contrary, the invention is intended to cover alternatives, modifications, equivalents and alternatives which may be included within the spirit and scope of the invention as defined by the appended claims. Furthermore, in the following detailed description of the present invention, certain specific details are set forth in order to provide a better understanding of the present invention. It will be apparent to one skilled in the art that the present invention may be practiced without these specific details.

Referring to fig. 1 and 2, the power cable wireless temperature measurement system and the temperature measurement device of the invention comprise a temperature measurement node and a device thereof, a system gateway and a monitoring host, wherein the temperature measurement node comprises a single chip microcomputer 1, a temperature sensor 2, a power module 3 and a wireless communication module 4. The system gateway comprises a singlechip 5, a storage module 6, a wireless communication module 7, an RS485 communication module 8, a 4G module 9 and a power module 10. The monitoring host comprises an android APP11 and an Internet of things cloud platform 12.

The appearance structure of the temperature measuring device is a watchband type structure and comprises a watchband main body S1, a main body right side watchband S2, a main body left side watchband S3, a main body top cover S8, a hole S4 formed in the center position of the top cover S8, a rectangular small hole S5 formed in one surface of the main body adjacent to the right side watchband S2 in the right direction, and an annular small hole S6 formed in the left side watchband S3 close to the left side. Wherein, the temperature measurement node sets up in main part S1, and temperature sensor can stretch out from trompil S4, closely sets up together with the cable, and right side watchband S2 can closely link together with left side watchband S3, closely sets up temperature measuring device on the cable.

In a specific embodiment, the main body S1 of the temperature node mounting device has a length of 29mm, a width of 32mm and a height of 21mm, and can accommodate the hardware circuit board of the temperature node and be tightly attached. The right watchband S2 is 30cm long, and the surface has trapezoidal antiskid line, when tying up on the cable after the fastening, is difficult for droing. The left band S3 is 6cm long and has a ring-shaped small hole S6 at a distance of 5cm from the left surface of the band body S1. The diameter of the annular small hole of S6 is 1cm, which just meets the requirement that the right watchband S2 passes through. The diameter of a small round hole S4 formed in the center of the top cover S8 is 0.5cm, and the size of the small round hole can ensure that the temperature sensor extends out. The rectangular small hole S5 formed in the back of the main body S1 is 0.5cm long and 0.2cm wide, so that the temperature measuring node switch can extend out, and manual control is facilitated.

In a specific embodiment, the single chip microcomputer 1 in the temperature measurement node is used for receiving temperature data acquired by the temperature sensor 2 and processing the data, the processed data is reported to a system gateway through the wireless communication module 4, and the power module 3 supplies power to the whole temperature measurement node.

The single chip microcomputer 1 in the temperature measuring node is of a chip model STM32L011F4, the chip has a 5-medium-low power consumption mode, the current is only 0.23uA in a standby mode, and the chip has a flexible voltage control framework. The singlechip 1 starts a low-power mode of the voltage regulator to control the power consumption of the system. And the internal RTC awakens the acquisition ADC to acquire temperature data at regular time.

The temperature sensor 2 adopts a thermistor, has small volume, good robustness and wide temperature measurement range, and is suitable for being used in the power cable environment.

The power module 3 adopts ER142503.6V 1200mAh lithium battery to supply power.

Wireless communication module 4 chooses for use loRa communication module, and loRa communication module has that communication distance is far away, and the low power dissipation, but advantages such as single net access node capacity is big. LoRa communication module links to each other through 4 pins with singlechip 1, is SCK, MISO, MOSI, NSS respectively, adopts SPI communication mode to carry out data transmission. The spread spectrum factor and the bandwidth can be flexibly configured, and the flexibility of the communication range is ensured.

In a specific embodiment, the system gateway may access 250 temperature measurement nodes at maximum, and forward data information reported by all the accessed temperature measurement nodes to the monitoring host. The single chip microcomputer 5 is a PIC32MM0064 chip, belongs to an industrial application single chip microcomputer, and is connected with the storage module 6, the wireless communication module 7, the RS485 communication module 8, the 4G module 9 and the power module 10 respectively.

The storage module 6 selects an AT24C02 module to be connected with SCL and SDA pins of the singlechip 5, and the EEPROM is operated by using I2C time sequence. For storing ID and address information of all nodes.

The wireless communication module 7 selects an LoRa communication module for networking wireless communication with the node.

The RS485 communication module 8 selects chip signals as MAX3485, the power supply voltage of the chip only needs 3.3V, other functions are the same as MAX485, and extra power supply pins can be saved. The RS485 communication module 8 is connected with the singlechip 5 through 3 pins, one control pin determines whether the singlechip is in a receiving state or a sending state, and the RS485 communication module 8 is used for communication between the system gateway and the monitoring host.

The 4G module 9 selects a TAS-LTE-363 module and is used for forwarding all temperature measurement node data to the Internet of things cloud platform 12. The system supports working modes such as TCP, UDP, MQTT, HTTP and Aliyun direct connection, can be used for remote firmware upgrade, and supports user-defined network state reporting.

The power module 10 supplies power by external 5V, and the voltage is stabilized to 3.3V by the AS1117 voltage stabilizing chip to supply power for the whole system network.

In a specific embodiment, the monitoring host is used for displaying the running states of all the current nodes in real time, viewing historical temperature information and a temperature curve graph, and giving an alarm in time by short messages when abnormal conditions occur.

The internet of things cloud platform 12 is connected to the Ali cloud platform, the 4G module 9 has an Ali cloud direct connection working mode, and data are directly uploaded to the Ali cloud platform.

The android APP11 displays all node data uploaded by the RS485 communication module 9 in real time by receiving the node data, and stores all information in the data. The Android APP11 utilizes the most basic component Activity in the Android components, and completes multiple interface designs including a real-time data display interface, a parameter configuration interface and the like through multiple activities.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.