A power cable state measurement device based on the Internet of Things

Abstract

This invention belongs to the field of cable operating status measurement technology, specifically relating to an Internet of Things (IoT)-based power cable status measurement device. The device includes a measurement body, a housing body, a remote server, and an extended display screen. An infrared camera is mounted at the front end of the measurement body. A central controller is installed inside the measurement body. The central controller is electrically connected to the infrared camera and can collect infrared measurement data from the surface of the power cable. An arc-groove-shaped test station is provided on the front side of the housing body, which can cover the outer surface of the power cable. The remote server can receive the infrared measurement data uploaded by the central controller. This invention addresses the problem of dispersed cable status measurement in power systems, large measurement errors, and difficulties for technicians in conducting online status assessments. By collecting the surface temperature of the power cable, this solution provides data reference for the remote server to analyze the power cable status.

Description

Technical Field

[0001] The present invention belongs to the technical field of cable operation status measurement, and in particular relates to a power cable status measurement device based on the Internet of Things. Background Art

[0002] At present, the cable status measurement work in the power system is relatively scattered, and the sensors are diverse. Some evaluations still rely mainly on manual tests for measurement, which requires a lot of work and is difficult to meet the requirements of online status evaluation. As the number of cables increases, this method greatly affects the management efficiency of the cables and increases the management cost. For example: in the operation and maintenance of power cables, it is often necessary to measure the temperature of the power cables during operation. At present, the temperature of power cables is often measured by point temperature guns. Although this method has a long temperature measurement distance and high safety, it has a large error and requires manual recording of temperature measurement data and uploading to the computer, which consumes more manpower. In addition, since the measured temperature is the temperature of the current collection point on the surface of the cable, it is difficult to analyze the reasons for the temperature rise of the power cable. In particular, in the process of transmitting power, the factors causing the temperature rise of multi-core cables include local sheath damage, reduced insulation, incorrect cable selection, overload operation of the cable, and reduced insulation between phases of the cable. Through the current temperature of the power cable surface point position, it is difficult to measure the temperature of the power cable and analyze the operating status. Therefore, it is necessary to design a measuring device that can collect the temperature of the surface area of ​​the outer surface of the power cable and provide more measurement data for analyzing the operating status. Summary of the invention

[0003] In order to solve the problem of regional measurement of power cable surface temperature, this scheme provides a power cable status measurement device based on the Internet of Things.

[0004] The technical solution adopted by the present invention is:

[0005] A power cable state measuring device based on the Internet of Things, comprising a measuring body, a card cover body, a remote server and an extended display screen;

[0006] An infrared camera is arranged at the front end of the measuring body; a central controller is arranged inside the measuring body; the central controller is electrically connected to the infrared camera and can collect infrared measurement data of the surface of the power cable through the infrared camera;

[0007] An arc-groove-shaped test station is provided on the front side of the card cover body; the test station can be buckled onto the outer surface of the power cable;

[0008] The remote server is capable of communicating with the central controller and receiving infrared measurement data uploaded by the central controller;

[0009] The extended display screen is connected to the measuring body via a communication line and can display the infrared measurement data collected by the infrared camera in real time.

[0010] Since the existing technology uses a point temperature gun to measure the surface temperature of the power cable, it can only measure the temperature at a point position, which has the risk of large measurement errors. For this reason, the structure of an infrared camera is adopted in this solution, and the temperature of the surface area is collected by the infrared camera, so as to improve the accuracy of temperature measurement. In addition, during the data collection process of the infrared camera, the temperature changes within a time period can be collected, so that it is convenient for analysts to analyze the cable operation status according to the temperature change process.

[0011] The card cover body provided in the present solution can be buckled onto the outer surface of the power cable, which can not only stabilize the distance and position between the infrared camera and the outer surface of the cable, reduce the influence of shaking of the handheld measurement body on the measurement results, but also block the external heat source to a certain extent, thereby reducing the influence of external factors on the temperature measurement accuracy.

[0012] As a supplementary design or alternative structure of the above-mentioned power cable status measuring device: the card cover body includes a cover shell, the test station is located on the front side of the cover shell, and a number of elastic comb teeth are arranged at the inner edge of the test station; the comb teeth can fit the outer surface of the power cable and enclose a measurement area; the infrared camera can perform infrared measurement data on the center of the measurement area. The comb teeth can be made of soft rubber material, so that they can achieve elastic contact with the outer surface of the power cable, thereby avoiding the edges and corners on the cover from damaging the outer surface of the power cable during the measurement process. In addition, it can also play a windproof effect, thereby avoiding the external hot air or cold air from affecting the temperature of the outer surface of the power cable and affecting the accuracy of the temperature measurement.

[0013] As a supplementary design or alternative structure of the above-mentioned power cable status measuring device: the front side of the cover shell is detachably connected with a long side strip and an arc-shaped side strip; the comb teeth arranged on the long side strip are side comb teeth, and the side comb teeth can be attached to the outer surface of the power cable along the length direction of the power cable; the comb teeth arranged on the inner side of the arc-shaped side strip are end face comb teeth, and a plurality of end face comb teeth are distributed in an arc shape; an air passage for air circulation can be formed between the end face comb teeth. The length of each side face comb tooth is equivalent to the length of the shell cover, and there are a plurality of side face comb teeth and they can be in sealing contact with the outer surface of the power cable; and when the free end of the end face comb tooth contacts the outer surface of the power cable, the side face comb tooth will be bent into an arc shape, thereby forming a fine air passage between adjacent end face comb teeth, and realizing the circulation of airflow on the basis of ensuring that the temperature of the outer surface of the power cable is not affected by the external environment.

[0014] As a supplementary design or alternative structure of the above-mentioned power cable status measuring device: a cold air source mechanism is arranged in the measuring body, and when the card cover body covers the outer surface of the power cable, the cold air source mechanism can release cold air to cool the outer surface of the power cable in the area covered by the card cover body, thereby collecting data on the temperature rise state of the power cable.

[0015] As a supplementary design or alternative structure of the above-mentioned power cable status measuring device: the cold air source mechanism includes a cold air tank, an electric control valve and an evaporating disk; the outlet of the cold air tank is connected to the evaporating disk through a pipe; the electric control valve is connected in series to the pipe between the cold air tank and the evaporating disk; when the electric control valve is in an open state, the cold liquid in the cold air tank evaporates into a gaseous state at the evaporating disk and is used to cool the outer surface of the power cable.

[0016] As a supplementary design or alternative structure of the above-mentioned power cable status measuring device: a fan is arranged on the front side of the evaporating disk, and the fan is used to drain the cold air evaporated from the evaporating disk; the cold air is the gas generated after the cold liquid evaporates, or, an air inlet connected to the external environment is arranged on the side wall of the chamber where the evaporating disk is located, and the cold air is a mixture of the cold liquid evaporated gas and air.

[0017] As a supplementary design or alternative structure of the above-mentioned power cable status measuring device: a uniform cooling grid is arranged on the front side of the fan, and the uniform cooling grid is used to evenly guide the cold air into parallel airflows; the infrared camera is arranged at the center of the uniform cooling grid.

[0018] As a supplementary design or alternative structure of the above-mentioned power cable status measuring device: the measuring body is provided with a cold tank bin for installing a cold air tank, and a bin baffle is provided on one side of the cold tank bin, which is used to open and close the cold tank bin; multiple cold air tanks are distributed in an array in the cold tank bin, and each cold air tank is connected to the evaporating plate through a pipe.

[0019] As a supplementary design or alternative structure of the above-mentioned power cable status measuring device: a thermal insulation cotton pad is arranged in the cold tank warehouse, and the thermal insulation cotton pad has a plurality of installation holes distributed in a rectangular array, and each installation hole corresponds to the installation of a cold air tank.

[0020] As a supplementary design or alternative structure of the above-mentioned power cable status measuring device: the measuring body is provided with a main control compartment and a battery compartment; a board compartment baffle is provided at the side wall of the main control compartment, and the central controller is installed in the main control compartment; a battery compartment baffle is provided at the side wall of the battery compartment, and a battery is installed in the battery compartment, and the battery can supply power to the central controller.

[0021] The beneficial effects of the present invention are:

[0022] 1. In this solution, an infrared camera is used to collect the surface temperature of the power cable, which can not only collect the temperature of the surface area, but also collect the temperature changes within a period of time, thereby providing more data reference for the remote server to perform temperature analysis and judge the status of the power cable;

[0023] 2. This solution adopts a structure in which the card cover body is in contact with the outer surface of the power cable, which can not only isolate the influence of the external environment on the surface temperature measurement of the power cable, but also unify the distance and range of the surface area for temperature collection by the infrared camera, thereby providing support for multi-position temperature measurement of a single power cable;

[0024] 3. In this solution, a cold air tank can be used to cool the surface of the power cable, thereby facilitating the measurement of the temperature rise process within the surface area of ​​the power cable, thereby facilitating the remote server to determine the state of the power cable based on the surface temperature rise rate and the change of the successive temperature rise areas. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below.

[0026] Figure 1 It is a structural schematic diagram of the power cable status measuring device in this scheme;

[0027] Figure 2 It is a combined state diagram of the card cover body and the measurement body;

[0028] Figure 3 It is the internal structure diagram of the card cover body;

[0029] Figure 4 It is a diagram of the internal structure of the measurement subject.

[0030] Figure 5 It is the control logic diagram of power cable status measurement.

[0031] In the figure: 1-card cover body; 11-cover shell; 12-end face comb teeth; 13-side comb teeth; 14-long side strip; 15-arc side strip; 2-measuring body; 201-keyboard body; 202-electric control valve; 203-board bin baffle; 204-central controller; 205-battery; 206-battery bin baffle; 207-air tank; 208-tank bin baffle; 209-evaporation plate; 210-fan; 211-infrared camera; 212-uniform cooling grid; 3-extended display screen; 4-remote server. DETAILED DESCRIPTION

[0032] The technical solution in this embodiment will be clearly and completely described below in conjunction with the accompanying drawings. The described embodiments are only some of the embodiments, not all of them. Based on the embodiments in this solution, all other embodiments obtained by ordinary technicians in this field without making creative work are within the protection scope of this solution.

[0033] Example 1

[0034] During the operation and maintenance of power cables, it is often necessary to collect the surface temperature of the power cables to judge the status of the power cables. At present, the temperature of power cables is often measured by a point temperature gun. Although this method has a long temperature measurement distance and high safety, it has a large error and requires manual recording of temperature measurement data and uploading to a computer, which consumes more manpower. In addition, since the measured temperature is the temperature of the current collection point on the cable surface, it is difficult to analyze the reasons for the temperature rise of the power cable. In particular, in the process of transmitting electricity, the factors causing the temperature rise of multi-core cables include local sheath damage of the cable, reduced insulation, incorrect cable selection, cable overload operation, and reduced insulation between cable phases. It is difficult to measure the temperature of the power cable and analyze its operation status through the current point position measured by the point temperature gun.

[0035] In order to solve the above problems, this embodiment designs a power cable status measurement device based on the Internet of Things, such as Figures 1 to 5 As shown, the power cable status measuring device of this embodiment includes a measuring body 2, a card cover body 1, a remote server 4 and an extended display screen 3 and other structures.

[0036] Among them, the front end of the measuring body 2 is provided with an infrared camera 211; a central controller 204 is provided in the measuring body 2; the central controller 204 is electrically connected to the infrared camera 211, and can collect infrared measurement data of the surface of the power cable through the infrared camera 211. In this solution, the structure of the infrared camera 211 is adopted, and the infrared camera 211 is used to collect the temperature of the surface area, thereby improving the accuracy of temperature measurement, and in the process of data collection by the infrared camera 211, the temperature change within a time period can be collected, so that it is convenient for analysts to analyze the cable operation status according to the temperature change process.

[0037] An arc-groove-shaped test station is arranged on the front side of the card cover body 1; the test station can be buckled onto the outer surface of the power cable; thereby, the distance and position between the infrared camera 211 and the outer surface of the cable can be stabilized, the influence of shaking of the handheld measurement body 2 on the measurement result can be reduced, and external heat sources can be shielded to a certain extent, thereby reducing the influence of external factors on the temperature measurement accuracy.

[0038] The remote server 4 can be connected to the central controller 204 for communication and receive infrared measurement data uploaded by the central controller 204; the remote server 4 can obtain infrared measurement data by wireless communication, and can analyze and calculate the surface area temperature data collected by the infrared camera 211, so as to calculate a more accurate temperature value, and can also analyze the temperature changes of the surface area within the collection time period, so as to assist the technicians in making manual judgments on the status of the power cable, or assist the remote server 4 in making intelligent judgments. The method of intelligent judgment is specifically customized by the corresponding technicians and is not described in detail in this embodiment.

[0039] The extended display screen 3 is connected to the measuring body 2 via a communication line and can display the infrared measurement data collected by the infrared camera 211 in real time. One end of the communication line is connected to the measuring body 2, thereby facilitating the measurement personnel to observe the temperature measurement on site.

[0040] Example 2

[0041] like Figures 1 to 5 As shown, based on the structure of embodiment 1, this embodiment specifically designs the structure of the card cover body 1.

[0042] Specifically, the card cover body 1 of this embodiment is detachably connected to the measuring body 2, and the card cover body 1 includes a cover shell 11, and the test station is located at the front side of the cover shell 11. A plurality of elastic comb teeth are arranged at the inner edge of the test station; the comb teeth can be attached to the outer surface of the power cable and enclose a measuring area; the infrared camera 211 can perform infrared measurement data on the center of the measuring area. The comb teeth can be made of soft rubber material, and can then achieve elastic contact with the outer surface of the power cable, thereby preventing the edges and corners on the cover from damaging the outer surface of the power cable during the measurement process. In addition, it can also play a windproof effect, thereby preventing the external hot air or cold air from affecting the temperature of the outer surface of the power cable and affecting the accuracy of the temperature measurement.

[0043] The front side of the housing 11 is detachably connected with a long side strip 14 and an arc side strip 15; the comb teeth arranged on the long side strip 14 are side comb teeth 13, and the side comb teeth 13 can be attached to the outer surface of the power cable along the length direction of the power cable; the comb teeth arranged on the inner side of the arc side strip 15 are end face comb teeth 12, and a plurality of end face comb teeth 12 are distributed in an arc shape; an air passage for air circulation can be formed between the end face comb teeth 12. The length of each side face comb tooth 13 is equivalent to the length of the housing, and there are a plurality of side face comb teeth 13 and they can be sealed and contacted with the outer surface of the power cable; and when the free end of the end face comb tooth 12 contacts the outer surface of the power cable, the side face comb tooth 13 will be bent into an arc shape, thereby forming a fine air passage between adjacent end face comb teeth 12, and realizing the circulation of airflow on the basis of ensuring that the temperature of the outer surface of the power cable is not affected by the external environment.

[0044] Example 3

[0045] like Figures 1 to 5 As shown, based on the structure of embodiment 1 or embodiment 2, this embodiment specifically designs the structure of the measuring body 2.

[0046] The measuring body 2 has chamber structures such as a cold tank bin, a main control bin and a battery bin. The cold tank bin can be used to install a cold air tank 207. A tank baffle 208 is provided on one side of the cold tank bin, and the tank baffle 208 is used to open and close the cold tank bin. Multiple cold air tanks 207 are distributed in an array in the cold tank bin, and each cold air tank 207 is connected to an evaporation plate 209 through a pipeline. A heat preservation cotton pad is provided in the cold tank bin, and the heat preservation cotton pad has a number of installation holes distributed in a rectangular array, and each installation hole corresponds to the installation of a cold air tank 207. A board bin baffle 203 is provided at the side wall of the main control bin, and the central controller 204 is installed in the main control bin; a battery bin baffle 206 is provided at the side wall of the battery bin, and a battery 205 is installed in the battery bin, and the battery 205 can supply power to the central controller 204. A keyboard body 201 is disposed on the outer wall of the measuring body 2 ; the keyboard body 201 is electrically connected to the central controller 204 .

[0047] A cold air source mechanism is arranged in the measuring body 2, and the cold air source mechanism includes the cold air tank 207, the electric control valve 202 and the evaporation disk 209; the outlet of the cold air tank 207 is connected to the evaporation disk 209 through a pipeline; the electric control valve 202 is connected in series to the pipeline between the cold air tank 207 and the evaporation disk 209; when the electric control valve 202 is in an open state, the cold liquid in the cold air tank 207 evaporates into gas at the evaporation disk 209 and is used to cool the outer surface of the power cable.

[0048] A fan is provided in front of the evaporation plate 209, and the fan is used to drain the cold air evaporated from the evaporation plate 209; the cold air is the gas generated after the cold liquid evaporates, or an air inlet connected to the external environment is provided on the side wall of the chamber where the evaporation plate 209 is located, and the cold air is a mixed gas of the cold liquid evaporated gas and air. A uniform cooling grid 212 is provided in front of the fan, and the uniform cooling grid 212 is used to evenly drain the cold air into parallel airflows; the infrared camera 211 is provided at the center of the uniform cooling grid 212. The cold air tank 207 can be filled with liquid nitrogen, liquid oxygen, and other compressed gases that can generate a large amount of heat absorption when evaporated.

[0049] When the card cover body 1 covers the outer surface of the power cable, the cold air source mechanism can release cold air to cool the outer surface of the power cable in the area covered by the card cover body 1, thereby collecting data on the temperature rise state of the power cable.

[0050] The cold air tank 207 of this embodiment can cool the surface of the power cable, so as to facilitate the measurement of the temperature rise process in the surface area of ​​the power cable, so as to facilitate the remote server 4 to judge the state of the power cable according to the surface temperature rise rate and the change of the successive temperature rise areas. For example, after the electric control valve 202 is opened, the cold liquid in the cold air tank 207 can flow to the evaporation disk 209, and the evaporation disk 209 can be provided with an electric heating plate to increase the evaporation rate, or the evaporation disk 209 can evaporate the cold liquid naturally. The evaporation disk 209 is in the shape of a disk, and a plurality of fine holes are provided on the front side of the evaporation disk 209. Others produced by evaporation can flow forward from the fine holes and reach the uniform cold grid 212 under the guidance of the fan. The uniform cold grid 212 is made of aluminum alloy. If there are cold liquid droplets in the evaporated gas, secondary evaporation can be carried out at the uniform cold grid 212. At the same time, the uniform cold grid 212 can also be blown by the fan. The blown air becomes a parallel airflow, and then blows onto the surface of the power cable, thereby cooling the surface of the power cable. After cooling, the electric control valve 202 is closed. At this time, the surface of the power cable will heat up under the influence of its internal temperature. When the power cable is a multi-core wire, if a single core generates a large amount of heat, it will cause the depth speed of the corresponding position of the core to be faster; when the insulation performance of the outer protective layer of the power cable or the interphase insulation structure decreases, the heating speed will become faster; when the power cable is affected by the external environment, the maximum value of the temperature collected by the infrared camera 211 after cooling will not reach the temperature collected without cooling. Similarly, by collecting time period temperature data through the surface area of ​​the infrared camera 211, data collection of temperature rise speed changes and temperature rise area changes can be realized, so that it is convenient for technicians or remote servers 4 to measure and analyze the insulation performance, aging status and other power cable states of the power cable, thereby providing guarantee for the stable operation of the power system.

[0051] The above embodiments are merely examples for the purpose of clarifying the description, and are not intended to limit the implementation methods; it is not necessary and impossible to list all implementation methods exhaustively. However, obvious changes or modifications derived therefrom are still within the scope of protection of the present technology.

Claims

1. A power cable status measurement device based on the Internet of Things, characterized in that: It comprises a measuring body (2), a card cover body (1), a remote server (4) and an extended display screen (3); An infrared camera (211) is arranged at the front end of the measuring body (2); a central controller (204) is arranged inside the measuring body (2); the central controller (204) is electrically connected to the infrared camera (211) and is capable of collecting infrared measurement data of the surface of the power cable through the infrared camera (211); An arc-groove-shaped testing station is arranged on the front side of the card cover body (1); the testing station can be buckled onto the outer surface of the power cable; The remote server (4) is capable of being connected to the central controller (204) for communication and receiving infrared measurement data uploaded by the central controller (204); The extended display screen (3) is connected to the measurement body (2) via a communication line, and is capable of displaying infrared measurement data collected by the infrared camera (211) in real time; A cold air source mechanism is provided in the measuring body (2); when the card cover body (1) covers the outer surface of the power cable, the cold air source mechanism can release cold air to cool the outer surface of the power cable in the area covered by the card cover body (1), thereby collecting data on the temperature rise state of the power cable; The cold air source mechanism comprises a cold air tank (207), an electric control valve (202) and an evaporation disk (209); the outlet of the cold air tank (207) is connected to the evaporation disk (209) through a pipeline; the electric control valve (202) is connected in series to the pipeline between the cold air tank (207) and the evaporation disk (209); when the electric control valve (202) is in an open state, the cold liquid in the cold air tank (207) evaporates into a gaseous state at the evaporation disk (209) and is used to cool the outer surface of the power cable.

2. The power cable state measurement device based on the Internet of Things according to claim 1 is characterized in that: The card cover body (1) comprises a cover shell (11); a test station is located at the front side of the cover shell (11); a plurality of elastic comb teeth are arranged at the inner edge of the test station; the comb teeth can be attached to the outer surface of the power cable and enclose a measurement area; and the infrared camera (211) can perform infrared measurement data on the center of the measurement area.

3. The power cable state measurement device based on the Internet of Things according to claim 2 is characterized in that: The front side of the cover (11) is detachably connected to a long side strip (14) and an arc-shaped side strip (15); the comb teeth arranged on the long side strip (14) are side comb teeth (13), and the side comb teeth (13) can be attached to the outer surface of the power cable along the length direction of the power cable; the comb teeth arranged on the inner side of the arc-shaped side strip (15) are end face comb teeth (12), and a plurality of end face comb teeth (12) are distributed in an arc shape; and an air passage for air circulation can be formed between the end face comb teeth (12).

4. The power cable state measurement device based on the Internet of Things according to any one of claims 1 to 3, characterized in that: A fan is provided on the front side of the evaporation disk (209), and the fan is used to drain the cold air evaporated from the evaporation disk (209); the cold air is the gas generated after the cold liquid evaporates, or an air inlet connected to the external environment is provided on the side wall of the chamber where the evaporation disk (209) is located, and the cold air is a mixture of the cold liquid evaporated gas and air.

5. The power cable state measurement device based on the Internet of Things according to claim 4 is characterized in that: A uniform cooling grid (212) is arranged on the front side of the fan, and the uniform cooling grid (212) is used to evenly guide the cold air into parallel airflows; the infrared camera (211) is arranged at the center of the uniform cooling grid (212).

6. The power cable state measurement device based on the Internet of Things according to claim 4 is characterized in that: The measuring body (2) has a cold tank bin for installing a cold air tank (207), and a tank bin baffle (208) is provided on one side of the cold tank bin, and the tank bin baffle (208) is used to open and close the cold tank bin; a plurality of cold air tanks (207) are distributed in an array in the cold tank bin, and each cold air tank (207) is connected to an evaporation plate (209) via a pipeline.

7. The power cable state measurement device based on the Internet of Things according to claim 6 is characterized in that: A heat-insulating cotton pad is arranged in the cold tank bin, and the heat-insulating cotton pad has a plurality of installation holes distributed in a rectangular array, and each installation hole corresponds to the installation of a cold air tank (207).

8. The power cable state measurement device based on the Internet of Things according to claim 1 is characterized in that: The measuring body (2) has a main control compartment and a battery compartment; a compartment baffle (203) is provided at the side wall of the main control compartment, and the central controller (204) is installed in the main control compartment; a battery compartment baffle (206) is provided at the side wall of the battery compartment, and a storage battery (205) is installed in the battery compartment, and the storage battery (205) can supply power to the central controller (204).

Images