CN212872759U

CN212872759U - Underground circuit fault detection device based on multipoint infrared images

Info

Publication number: CN212872759U
Application number: CN202021070928.4U
Authority: CN
Inventors: 王艳军; 丁亮; 蒋伟; 刘晋锋; 贾璐; 安伟波
Original assignee: Wuyang Coal Mine Of Shanxi Lu'an Environmental Energy Development Co ltd
Current assignee: Wuyang Coal Mine Of Shanxi Lu'an Environmental Energy Development Co ltd
Priority date: 2020-06-11
Filing date: 2020-06-11
Publication date: 2021-04-02
Anticipated expiration: 2030-06-11

Abstract

The utility model relates to the technical field of underground circuit maintenance, in particular to an underground circuit fault detection device based on multipoint infrared images, which comprises a guide rail, a three-phase electrical parameter measuring instrument, a PLC controller and an upper computer; the guide rail is provided with a sliding block capable of sliding, the end surface of the guide rail close to the sliding block is inwards sunken to form a magnetic grid ruler installation groove, and a magnetic grid ruler belt is arranged in the magnetic grid ruler installation groove; the slider is connected with a mounting seat through a bolt, and a magnetic grid ruler reading head is arranged in the mounting seat; a power supply installation cavity, a camera installation cavity, a PLC installation cavity for installing a PLC and a motor installation cavity are also arranged in the installation seat; the motor is arranged in the motor mounting cavity, a gear located below the sliding block is arranged on a rotating shaft of the motor, the lower end portion of the guide rail extends downwards to form a rack mounting portion, and a rack meshed with the gear is arranged on the rack mounting portion. The utility model discloses divide into several key nodes with whole monitoring system for when monitoring, can be more swift, more accurate.

Description

Underground circuit fault detection device based on multipoint infrared images

Technical Field

The utility model relates to a circuit overhauls technical field in the pit, specifically speaking relates to a circuit fault detection device in pit based on multiple spot infrared image.

Background

The monitoring based on infrared image mainly is through unmanned aerial vehicle's mode, comes the circuit situation of real-time supervision whole cable through unmanned aerial vehicle. The unmanned aerial vehicle is an unmanned aerial vehicle operated by a radio remote control device or a control device with a preset program, and has the advantages of low cost, low loss, zero casualties, reusability, high maneuverability and the like. The detection of the large current mainly comprises the off-line travelling wave method distance measurement, and a low-voltage pulse is transmitted in the fault power transmission cable by applying a low-voltage pulse method. When the low-voltage pulse meets a short-circuit fault point, the impedance sudden change reflects, and the distance measuring device detects and records the time difference between the reflected pulse and the transmitted pulse to obtain the fault distance of the cable. The method can eliminate the traveling wave propagation speed by utilizing the detection time of the fault point reflected wave, the cable opposite end reflected wave and the initial traveling wave, and obtain a single-end traveling wave distance measurement algorithm without the need of the wave speed. The impedance method is used for ranging, the voltage and the current of the initial end of the line are detected when the power supply line has a fault, the reactance value of the line is calculated, and the reactance value is in direct proportion to the line length from the initial end of the line to a fault point, so that the reactance value in unit length of the line can be divided by the reactance value, and the fault distance can be obtained.

The application of the infrared imaging technology to the detection of the underground power supply system has obvious advantages. When the infrared detection of the electrical equipment is carried out on site, the measurement result is greatly different due to the influence of site factors such as solar radiation and the like. But the underground environment is special, the influence of solar radiation is avoided, the measured image result is more accurate, and the circuit fault analysis is convenient to carry out. But because the underground unmanned aerial vehicle is not well controlled, the communication mode is also greatly limited.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model discloses a following technical scheme can solve:

a multipoint infrared image-based underground circuit fault detection device comprises a guide rail arranged beside an underground circuit, a three-phase electrical parameter measuring instrument connected with the underground circuit and used for measuring electrical parameters on the circuit, a PLC (programmable logic controller) and an upper computer; the three-phase electric parameter measuring instrument sends data to the upper computer through wireless transmission, and the upper computer is used for analyzing the data and sending instructions to the PLC through wireless transmission; the guide rail is provided with a sliding block capable of sliding, the end surface of the guide rail close to the sliding block is inwards sunken to form a magnetic grid ruler installation groove, and a magnetic grid ruler belt arranged along the length direction of the guide rail is arranged in the magnetic grid ruler installation groove; the slider is connected with a mounting seat through a bolt, a magnetic grid ruler reading head mounting cavity is arranged in the mounting seat, a slider through hole is formed in the slider, and a magnetic grid ruler reading head which penetrates through the slider through hole and is matched with the magnetic grid ruler belt is arranged in the magnetic grid ruler reading head mounting cavity; a power supply installation cavity, a camera installation cavity, a PLC installation cavity for installing a PLC and a motor installation cavity are also arranged in the installation seat; a motor is arranged in the motor mounting cavity, a gear positioned below the sliding block is arranged on a rotating shaft of the motor, the lower end part of the guide rail extends downwards to form a rack mounting part, and a rack meshed with the gear is arranged on the rack mounting part; a power supply is arranged in the power supply installation cavity, and an infrared camera is arranged in the camera installation cavity; the motor is electrically connected with the power supply and the PLC; the PLC controller is electrically connected with the power supply; and the infrared camera is electrically connected with the power supply and the PLC.

The utility model discloses a circuit fault detection device in pit based on multiple spot infrared image divide into several key nodes with whole monitoring system for when monitoring, can be more swift, more accurate.

Preferably, RS485 data transmission is adopted between the three-phase electrical parameter measuring instrument and the upper computer; RS485 data transmission is adopted between the upper computer and the PLC.

Through inciting somebody to action the utility model provides an adopt RS485 data transmission between RS485 data transmission and host computer and the PLC controller between three-phase electrical parameter measuring apparatu and the host computer, can make the information transmission between three-phase electrical parameter measuring apparatu and host computer and PLC controller and the host computer have the stability of preferred.

Preferably, a temperature sensor installation cavity, a dust sensor installation cavity and a gas concentration sensor installation cavity are further formed in the installation seat, and a temperature sensor, a dust sensor and a gas concentration sensor are respectively arranged in the temperature sensor installation cavity, the dust sensor installation cavity and the gas concentration sensor installation cavity.

Through the arrangement of the temperature sensor, the temperature in the coal mine can be measured, and whether the environmental temperature of the whole system is normal or not during operation is ensured; through the arrangement of the dust concentration sensor, the dust concentration in the coal mine can be measured, and when the dust concentration is too high, corresponding treatment is carried out, so that the dangers such as explosion and the like are prevented; through the setting of gas concentration sensor, can measure the gas concentration in the colliery, the gas content in the air when real time monitoring was in entire system operation carries out corresponding processing when gas concentration is too high, prevents dangers such as gas explosion.

Preferably, the side walls at two ends of the camera mounting cavity are provided with mounting through holes, the camera mounting cavity is internally provided with a rotatable mounting cylinder, the side walls at two ends of the mounting cylinder are provided with supporting columns in clearance fit with the mounting through holes, the bottom wall of the camera mounting cavity is provided with screw holes, the screw holes are internally provided with bolts matched with the screw holes, the lower end part of the mounting cylinder is provided with a first connecting ring, the end part of each bolt, which extends into the corresponding camera mounting cavity, is provided with a rotatable second connecting ring, and the second connecting ring penetrates through the first connecting ring.

Through the utility model discloses a setting of an installation section of thick bamboo can be installed infrared camera in an installation section of thick bamboo, later rotates the bolt, realizes the rotation of an installation section of thick bamboo in vertical side, to adjusting of the angle of an installation section of thick bamboo, also adjusts infrared camera's angle promptly for infrared camera rotation to suitable angle of establishing is to the infrared, thereby has promoted the accuracy of infrared camera when shooing.

Preferably, the upper end of the bolt is provided with a flange mounting cavity with an opening diameter smaller than the diameter of the inner wall, a rotatable flange is arranged in the flange mounting cavity, the upper end of the flange extends out of the flange mounting cavity, and the second connecting ring is fixedly connected with the upper end of the flange.

Through the utility model discloses a flange installation cavity and the setting of flange can realize the rotation of second go-between through the rotation of flange to the rotation of comparatively convenient second go-between.

Drawings

Fig. 1 is a schematic structural view of a guide rail, a slider, and a mount in embodiment 1.

Fig. 2 is a cross-sectional view of the rail, slider, and mount of fig. 1.

Fig. 3 is a schematic structural view of the guide rail of fig. 1.

Fig. 4 is a schematic structural diagram of the slider in fig. 1.

Fig. 5 is a cross-sectional view of the mount of fig. 1.

Fig. 6 is a schematic structural view of the mounting cylinder in fig. 2.

Fig. 7 is an enlarged view of a portion a in fig. 2.

Fig. 8 is a block diagram showing a configuration of a downhole circuit failure detection apparatus based on a multipoint infrared image in embodiment 1.

Fig. 9 is a flowchart of the operation of the downhole circuit fault detection device based on the multipoint infrared image in embodiment 1.

Fig. 10 is a schematic view of a slide module in embodiment 1.

Fig. 11 is a schematic diagram of an original image in embodiment 1.

Fig. 12 is a diagram illustrating median filtering in example 1.

The names of the parts indicated by the numerical references in the drawings are as follows:

110. a guide rail; 120. a slider; 130. a mounting seat; 140. a rack mounting portion; 150. a rack; 160. a temperature sensor mounting cavity; 170. a dust sensor mounting cavity; 180. a gas concentration sensor mounting cavity; 210. A PLC controller; 220. a magnetic grid tape; 230. a magnetic grid ruler reading head installation cavity; 240. a magnetic grid ruler reading head; 250. a power supply installation cavity; 260. a camera mounting cavity; 270. a PLC controller installation cavity; 280. a motor mounting cavity; 290. a motor; 2100. a gear; 2110. a power source; 2120. an infrared camera; 2130. mounting the cylinder; 2140. a bolt; 310. a magnetic grid ruler mounting groove; 410. a slider through hole; 510. a temperature sensor; 520. A dust sensor; 530. a gas concentration sensor; 610. a support pillar; 710. a screw hole; 720. a first connecting ring; 730. a second connection ring; 740. a flange mounting cavity; 750. a flange.

Detailed Description

For a further understanding of the present invention, reference will be made to the following detailed description taken in conjunction with the accompanying drawings and examples. It is to be understood that the examples are illustrative of the invention only and are not limiting.

Example 1

As shown in fig. 1-9, the present embodiment provides a downhole circuit fault detection device based on multipoint infrared images, which includes an image acquisition module, a motor driving unit, a power module, a current parameter detection module, a temperature, dust and gas concentration detection module, and a data processing unit. The image acquisition module includes infrared camera 2120, and motor drive unit includes motor 2100, and power module includes power 2110, and current parameter detection module includes three-phase electrical parameter measuring apparatu, and temperature, dust and gas concentration detection module include temperature sensor 510, dust sensor 520 and gas concentration sensor 530, and the data processing unit includes PLC controller 210 and host computer. The system comprises a guide rail 110 arranged beside an underground circuit, a three-phase electrical parameter measuring instrument connected with the underground circuit and used for measuring electrical parameters on the circuit, a PLC 210 and an upper computer; the three-phase electric parameter measuring instrument sends data to the upper computer through wireless transmission, and the upper computer is used for analyzing the data and sending instructions to the PLC 210 through wireless transmission; the guide rail 110 is provided with a slidable sliding block 120, the end surface of the guide rail 110 close to the sliding block 120 is inwards recessed to form a magnetic grid ruler installation groove 310, and a magnetic grid ruler strip 220 arranged along the length direction of the guide rail 110 is arranged in the magnetic grid ruler installation groove 310; the slider 120 is connected with the mounting base 130 through a bolt, a magnetic grid ruler reading head mounting cavity 230 is arranged in the mounting base 130, a slider through hole 410 is arranged on the slider 120, and a magnetic grid ruler reading head 240 which penetrates through the slider through hole 410 and is matched with the magnetic grid ruler belt 220 is arranged in the magnetic grid ruler reading head mounting cavity 230; a power supply installation cavity 250, a camera installation cavity 260, a PLC installation cavity 270 for installing the PLC 210 and a motor installation cavity 280 are further arranged in the installation seat 130; a motor 290 is arranged in the motor mounting cavity 280, a gear 2100 positioned below the slider 120 is arranged on a rotating shaft of the motor 290, the lower end part of the guide rail 110 extends downwards to form a rack mounting part 140, and a rack 150 meshed with the gear 2100 is arranged on the rack mounting part 140; the power supply mounting cavity 250 is internally provided with a power supply 2110, and the camera mounting cavity 260 is internally provided with an infrared camera 2120; the motor 290 is electrically connected with the power source 2110 and the PLC 210; the PLC 210 is electrically connected with the power source 2110; the infrared camera 2120 is electrically connected with the power source 2110 and the PLC controller 210.

In this embodiment, the underground circuit fault detection device based on the multipoint infrared image sets the whole circuit system to be 5 key nodes (the number of the nodes can be increased or decreased according to the actual length) when the underground circuit fault detection device works, each node mainly comprises six units, namely an image acquisition module, a motor driving unit, a power supply module, a current parameter detection module, a temperature, dust and gas concentration detection module and a data processing unit. A three-phase electric parameter measuring instrument in the current parameter detection module measures electric energy statistics such as three-phase voltage, three-phase current, power factor and the like in the alternating current circuit. The three-phase electrical parameter measuring instrument transmits measured data to an upper computer, the upper computer processes and analyzes the data sent by the three-phase electrical parameter measuring instrument, when the upper computer detects data abnormality, after fault processing, an instruction is sent to the PLC controllers 210 on corresponding nodes, the PLC controllers 210 control the corresponding motors 2100 through the received instruction, the motors 2100 are controlled to rotate, so that the infrared cameras 2120 move between the two key nodes, the infrared cameras 2120 recognize pictures shot through the infrared cameras 2120, and the distances of corresponding fault points are determined through the data returned by the magnetic grid ruler reading heads 240. The underground circuit fault detection device based on the multipoint infrared images in the embodiment divides the whole monitoring system into a plurality of key nodes, so that the underground circuit fault detection device can be more rapid and accurate in monitoring.

After the infrared camera 2120 collects the image, some processing is needed, and the infrared camera 2120 is easily interfered by a lot of noise in the processes of shooting and information transmission, so that the infrared image is not enough to truly reflect the target, and the imaging effect of the image is poor. Therefore, image filtering is needed to reduce noise interference in the image, and then edge detection is performed, wherein the image edge is the most obvious part of the image with the gray level change, and an edge detection algorithm detects the image edge according to the principle.

And (3) filtering algorithm: median filtering is mainly used for carrying out median filtering on the acquired image. The median filtering algorithm mainly depends on a quick sorting algorithm, has the advantage of less fuzzy edges, can effectively reduce random noise and noise pulses, and can completely retain the edge information of the image. Taking the sliding module of 3 × 3 as an example, as shown in fig. 10 to 12, where fig. 10 is the sliding module, fig. 11 is the original image portion, and fig. 12 is the result after median filtering, where X, Y axes respectively represent the horizontal and vertical directions of the infrared image. The 9 elements in fig. 11 are compared with each other, and the intermediate value g (x, y) is taken as the final output value.

Assuming that the original image of an image is f (x, y), S is a set of neighborhoods centered at point (x, y), the median image g (x, y) is described as follows:

edge detection algorithm: the image edge is the most obvious part of the image with gray level change, and the edge detection algorithm detects the image edge according to the principle. The method utilizes a Sobel operator to carry out edge detection, and the Sobel operator edge detection basic principle is to use the characteristic that gray values on two sides of an edge have obvious changes and then use the reciprocal of the gray value to describe the changes of edge points. The Sobel operator comprises two groups of 3-by-3 matrixes which are respectively a transverse operator and a longitudinal operator, and transverse and longitudinal gray level distribution gradients can be obtained by performing convolution operation on the Sobel operator and an image. The Sobel operator is shown in formula (2):

the gradient amplitude obtained by using the Sobel operator is as shown in formula (3):

in the embodiment, RS485 data transmission is adopted between the three-phase electrical parameter measuring instrument and the upper computer; RS485 data transmission is adopted between the upper computer and the PLC 210.

By adopting the RS485 data transmission between the three-phase electrical parameter measuring instrument and the upper computer and adopting the RS485 data transmission between the upper computer and the PLC controller 210 in the embodiment, the information transmission between the three-phase electrical parameter measuring instrument and the upper computer and between the PLC controller 210 and the upper computer can have better stability.

In this embodiment, a temperature sensor installation cavity 160, a dust sensor installation cavity 170, and a gas concentration sensor installation cavity 180 are further provided in the installation base 130, and a temperature sensor 510, a dust sensor 520, and a gas concentration sensor 530 are respectively provided in the temperature sensor installation cavity 160, the dust sensor installation cavity 170, and the gas concentration sensor installation cavity 180.

Through the arrangement of the temperature sensor 510 in the embodiment, the temperature in the coal mine can be measured, and whether the ambient temperature of the whole system is normal during operation is ensured. Through the setting of dust concentration sensor 520, can measure the dust concentration in the colliery, when dust concentration was too high, carry out corresponding processing, dangers such as explosion prevent to appear. Through the setting of gas concentration sensor 530, can measure the gas concentration in the colliery, the gas content in the air when real time monitoring was in entire system operation carries out corresponding processing when gas concentration is too high, prevents dangers such as gas explosion.

In this embodiment, the side walls at the two ends of the camera mounting cavity 260 are provided with the mounting through holes 131, the camera mounting cavity 260 is provided with the rotatable mounting barrel 2130 therein, the side walls at the two ends of the mounting barrel 2130 are provided with the supporting columns 610 in clearance fit with the mounting through holes 131, the bottom wall of the camera mounting cavity 260 is provided with the screw holes 710, the screw holes 710 are provided with the bolts 2140 matched with the screw holes 710 therein, the lower end part of the mounting barrel 2130 is provided with the first connecting ring 720, the end part of the bolt 2140 extending into the camera mounting cavity is provided with the rotatable second connecting ring 730, and the second connecting ring 730 passes through the first connecting ring 720.

Through the setting of the installation barrel 2130 in this embodiment, the infrared camera 2120 can be installed in the installation barrel, and then the bolt 2140 is rotated, so that the installation barrel 2130 can rotate in the vertical direction, the angle of the installation barrel 2130 can be adjusted, that is, the angle of the infrared camera 2120 can be adjusted, the infrared camera 2120 can be rotated to a proper angle, and the accuracy of the infrared camera 2120 in shooting can be improved.

In this embodiment, the bolt 2140 has a flange mounting cavity 740 having an opening diameter smaller than the inner wall diameter at an upper end portion thereof, a rotatable flange 750 is provided in the flange mounting cavity 740, an upper end portion of the flange 750 extends out of the flange mounting cavity 740, and the second coupling ring 730 is fixedly coupled to the upper end portion of the flange 750.

Through the arrangement of the flange mounting cavity 740 and the flange 750 in this embodiment, the rotation of the second connection ring 730 can be achieved through the rotation of the flange 750, so that the rotation of the second connection ring 730 is more convenient.

In short, the above description is only a preferred embodiment of the present invention, and all the equivalent changes and modifications made in accordance with the claims of the present invention should be covered by the scope of the present invention.

Claims

1. Circuit fault detection device in pit based on multiple spot infrared image, its characterized in that: the device comprises a guide rail (110) arranged beside an underground circuit, a three-phase electrical parameter measuring instrument connected with the underground circuit and used for measuring electrical parameters on the circuit, a PLC (programmable logic controller) (210) and an upper computer; the three-phase electric parameter measuring instrument sends data to an upper computer through wireless transmission, and the upper computer is used for analyzing the data and sending instructions to a PLC (programmable logic controller) (210) through wireless transmission; a sliding block (120) capable of sliding is arranged on the guide rail (110), the end surface of the guide rail (110) close to the sliding block (120) is inwards sunken to form a magnetic grid ruler installation groove (310), and a magnetic grid ruler belt (220) arranged along the length direction of the guide rail (110) is arranged in the magnetic grid ruler installation groove (310); the slider (120) is connected with the mounting seat (130) through a bolt, a magnetic grid ruler reading head mounting cavity (230) is arranged in the mounting seat (130), a slider through hole (410) is formed in the slider (120), and a magnetic grid ruler reading head (240) which penetrates through the slider through hole (410) and is matched with the magnetic grid ruler belt (220) is arranged in the magnetic grid ruler reading head mounting cavity (230); a power supply installation cavity (250), a camera installation cavity (260), a PLC installation cavity (270) for installing a PLC (210) and a motor installation cavity (280) are further arranged in the installation seat (130); a motor (290) is arranged in the motor mounting cavity (280), a gear (2100) positioned below the sliding block (120) is arranged on a rotating shaft of the motor (290), the lower end part of the guide rail (110) extends downwards to form a rack mounting part (140), and a rack (150) meshed with the gear (2100) is arranged on the rack mounting part (140); a power supply (2110) is arranged in the power supply mounting cavity (250), and an infrared camera (2120) is arranged in the camera mounting cavity (260); the motor (290) is electrically connected with the power supply (2110) and the PLC controller (210); the PLC controller (210) is electrically connected with the power supply (2110); the infrared camera (2120) is electrically connected with the power supply (2110) and the PLC (210).

2. The downhole circuit fault detection device based on multipoint infrared images of claim 1, wherein: RS485 data transmission is adopted between the three-phase electric parameter measuring instrument and the upper computer; RS485 data transmission is adopted between the upper computer and the PLC controller (210).

3. The downhole circuit fault detection device based on multipoint infrared images of claim 1, wherein: still be equipped with temperature sensor installation cavity (160), dust sensor installation cavity (170) and gas concentration sensor installation cavity (180) in mount pad (130), be equipped with temperature sensor (510), dust sensor (520) and gas concentration sensor (530) respectively in temperature sensor installation cavity (160), dust sensor installation cavity (170) and the gas concentration sensor installation cavity (180).

4. The downhole circuit fault detection device based on multipoint infrared images of claim 1, wherein: be equipped with installation through hole (131) on the lateral wall at camera installation cavity (260) both ends, be equipped with rotatable installation section of thick bamboo (2130) in camera installation cavity (260), be equipped with on the lateral wall at installation section of thick bamboo (2130) both ends with installation through hole (131) clearance fit's support column (610), be equipped with screw (710) on camera installation cavity (260) diapire, be equipped with in screw (710) with screw (710) matched with bolt (2140), the lower tip of installation section of thick bamboo (2130) is equipped with first go-between (720), the tip that stretches into in the camera installation cavity on bolt (2140) is equipped with rotatable second go-between (730), second go-between (730) pass first go-between (720).

5. The downhole circuit fault detection device based on multipoint infrared images of claim 4, wherein: the upper end of the bolt (2140) is provided with a flange mounting cavity (740) with an opening diameter smaller than the diameter of the inner wall, a rotatable flange (750) is arranged in the flange mounting cavity (740), the upper end of the flange (750) extends out of the flange mounting cavity (740), and the second connecting ring (730) is fixedly connected with the upper end of the flange (750).