Mechanical vision-based insulation resistance automatic detection device

Abstract

The application relates to a mechanical vision-based automatic insulation resistance detection device, characterized by being composed of a device fixing assembly, a mechanical vision control assembly and an insulation resistance test assembly; the device fixing assembly comprises guide rails, connecting rods, pulleys, two-side fixers and clamping groove fixers; the guide rails are divided into left and right parts, the guide rail end parts are telescopically inserted into the holes of the connecting rods to adapt to secondary wiring terminal rows with different lengths, and the device is fixed on the two sides of the secondary wiring terminal row through the two-side fixers; the pulleys are slidingly connected in the guide sliding channels of the connecting rods, the pulleys are connected with controllers, and five groups of clamping groove fixers are arranged on the outer sides of the connecting rods; the mechanical vision-based automatic insulation resistance detection device is rationally designed and is favorable for solving the problem of low efficiency of the traditional manual insulation resistance detection method.

Description

Technical field:

[0002] The invention relates to an automatic insulation resistance detection device based on machine vision. Background technology:

[0004] As the power grid continues to develop towards intelligence and digitalization, the use of secondary cable collection equipment and operation information for data analysis is the only way to achieve the construction of new power systems. To this end, the detection of the insulation performance of secondary cables is particularly important. However, in the current power grid acceptance process, the secondary circuit insulation test is mainly manual, with a large workload, low degree of automation, and low detection efficiency. Therefore, designing an automatic detection device to improve operational efficiency has great practical significance and broad research prospects.

[0005] At present, the insulation resistance test research on the market mainly focuses on the improvement and optimization of measurement algorithms and multi-channel acquisition of test circuits. Human participation in the insulation resistance test is always required. Therefore, it is necessary to use an insulation resistance automatic detection device based on machine vision to achieve the purpose of rapid positioning and automatic detection, and improve the automation level and test accuracy of insulation resistance detection. Summary of the invention:

[0007] In view of the above problems, the purpose of the present invention is to propose an automatic insulation resistance detection device based on machine vision. The automatic insulation resistance detection device based on machine vision is reasonably designed and is conducive to solving the problem of low efficiency of traditional manual insulation resistance detection methods.

[0008] The present invention provides an automatic insulation resistance detection device based on mechanical vision, which is characterized by comprising three parts: a device fixing assembly, a mechanical vision control assembly, and an insulation resistance test assembly;

[0009] The device fixing assembly includes a guide rail, a connecting rod, a pulley, two side fixtures, and a slot fixture. The guide rail is divided into two left and right parts. The end of the guide rail extends into the hole of the connecting rod to adapt to secondary terminal blocks of different lengths. The device is fixed to both sides of the secondary terminal block through the fixtures on both sides. The pulley is slidably connected to the guide slide of the connecting rod. The pulley is connected to the controller. Five sets of slot fixtures are provided on the outside of the connecting rod.

[0010] The machine vision control assembly includes a touch display, a controller, a switch button, and a macro camera. The switch button controls the power supply of the device. LED lights are provided on both sides of the macro camera to ensure that the light source meets the detection requirements. The macro camera is embedded in the back of the controller and can transmit the captured images to the controller. The controller has a built-in servo motor and transmission mechanism for driving the pulley. The touch display is used for information display and to realize test interaction with the user.

[0011] The insulation resistance test assembly includes a positive wiring port, a ground wiring port, a linkage mechanism, a single telescopic mechanism, a flat-blade screwdriver measuring head, and a measuring head active area; the positive wiring port is a universal interface, adapted for the positive test lead connection of common insulation resistance meters on the market; the ground wiring port is an external grounding terminal, which shares the same ground with the insulation resistance meter during operation; the linkage mechanism is used to drive five flat-blade screwdriver measuring heads to move simultaneously on the measuring head active area; the single telescopic mechanism can realize the telescopic movement of a single flat-blade screwdriver measuring head according to the instructions issued by the controller, so as to complete the test process; the flat-blade screwdriver measuring head is used for insulation testing of secondary terminal blocks and terminal wiring detection.

[0012] Preferably, an electric push rod is installed in the body of the single telescopic mechanism, and the free end of the electric push rod is connected to the flat-blade screwdriver measuring head.

[0013] Preferably, the linkage mechanism is driven to move in one direction by an electric mechanism disposed in the device body.

[0014] Preferably, after the device is fixed on the secondary terminal block, the controller moves to the corresponding position on the guide rail through the pulley, the macro camera transmits the secondary terminal block position image information to the controller, the controller determines the secondary terminal block position information through the built-in image processing circuit, and drives the servo motor to move the linkage mechanism to realize interface positioning; the controller determines the measurement interval through multiple sets of image comparisons, and uses the pulley to make the device body slide left and right on the guide rail to complete the measurement of all secondary terminal blocks in the fixtures on both sides.

[0015] Preferably, after the device is connected to the insulation resistance meter and fixed on the secondary terminal block, the controller first performs an instrument self-test to determine whether the device wiring is correct; after the device passes the self-test, the controller converts the image information into an electrical signal to align the linkage mechanism with the wiring port to be tested; through image comparison, the measurement quantity is confirmed, and the corresponding number of single telescopic mechanisms are driven to push the flat-blade screwdriver measuring head out until it contacts the wiring port to be tested; the flat-blade screwdriver measuring head engages with the screw slot inside the wiring port to be tested by rotation; after confirming that the engagement is tight, the flat-blade screwdriver measuring head simulates the manual tightening torque to test the wiring of the wiring port to be tested; when the wiring test of the wiring port to be tested is completed, the controller uses the multi-way selector to select the corresponding flat-blade screwdriver measuring head in turn to achieve rapid measurement of multiple wirings; test The results will be displayed on the touch screen display. If there are unqualified wiring ports, the macro camera will identify the terminal number, send the terminal number to the touch screen display and keep it until the user manually clears it, which is convenient for statistical work after the test is completed. When the five groups of slotted screwdriver measuring heads have completed the test, the controller will compare the photos taken by multiple groups of macro cameras to identify whether the test is completed. If there are still wiring ports to be tested, the pulley will cooperate with the linkage mechanism and the measuring head active area to move the slotted screwdriver measuring head to the next group of terminal blocks to be tested until the controller recognizes the image and completes the measurement of all secondary terminal blocks. The built-in buzzer will prompt the user to turn off the external insulation resistance meter switch. After confirming that the switch is turned off, the controller will use the test main circuit to short-circuit the positive wiring port and the ground wiring port to discharge the device.

[0016] Preferably, the above-mentioned device is adapted to common insulation resistance meters on the market; the device is interconnected and interactive with a mobile terminal via Bluetooth, and the user interacts with the device through the mobile terminal to achieve remote transmission of information such as mobile speed, test time, and statistics of unqualified terminal information.

[0017] When the device of the present invention is working, it uses a macro camera to collect images, and uses the guide rails around the controller and the built-in mechanical structure to realize the functions of measuring interval judgment and interface positioning; the measuring end adopts multiple groups of linked flat-blade screwdriver heads to achieve measurement efficiency improvement and wiring detection functions; the device is interconnected with the mobile terminal through Bluetooth, and the user can interact with the device through the mobile terminal. The automatic insulation resistance detection device based on mechanical vision can be adapted to common insulation resistance meters on the market, and has universal applicability. At the same time, it greatly improves the efficiency of detecting the insulation resistance of secondary terminal blocks. The research and development of this technology will greatly improve the on-site work efficiency of the power grid industry and is of great significance. Description of the drawings:

[0019] The present invention will be further described below with reference to the accompanying drawings;

[0020] Figure 1 is a front view of the device in an embodiment of the present invention;

[0021] Figure 2 is a rear view of the device in an embodiment of the present invention;

[0022] Figure 3 A bottom view of the device according to an embodiment of the present invention;

[0023] Figure 4 is a side view of the device in an embodiment of the present invention;

[0024] Figure 5 It is the workflow diagram of the present invention. Specific implementation method:

[0026] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0027] The automatic insulation resistance detection device based on machine vision of the present invention consists of three parts: a device fixing assembly, a machine vision control assembly and an insulation resistance test assembly;

[0028] The device fixing assembly includes a guide rail 1, a connecting rod 2, a pulley 4, two side fixers 10 and a slot fixer 11; the guide rail 1 is divided into two parts, the guide rail 1 can be a solid rod, the connecting rod 2 is a hollow tube, the end of the guide rail 1 extends into the channel of the connecting rod to extend and retract to adapt to secondary terminal blocks of different lengths, and a solid rod 3 with replaceable length is provided in the tube of the connecting rod 2. By replacing the solid rod 3 of different lengths, the extension length of the guide rail 1 can be adjusted, and the device is fixed to both sides of the secondary terminal block by the fixers 10 on both sides; the pulley 4 is slidably connected to the guide slide of the connecting rod 2, the pulley 4 is connected to the controller 6, and five groups of slot fixers 11 are provided on the outside of the connecting rod 2; the guide slide is a long strip groove provided on the connecting rod 2, and the pulley 4 contacts the guide rail 1 to generate a driving force to move along the length direction of the connecting rod 2 and the long strip groove when the pulley 4 rotates.

[0029] The rotation of the pulley 4 is driven by the output gear of the servo motor arranged in the device. The gear at the output end of the servo motor can drive one pulley 4 or multiple pulleys 4 to rotate.

[0030] The mechanical vision control assembly includes a touch display 5, a controller 6, a switch button 7, and a macro camera 12; the switch button 7 controls the power supply of the device; LED lights are provided on both sides of the macro camera 12 to ensure that the light source meets the detection requirements; the macro camera 12 is embedded in the back of the controller 6 and can transmit the captured images to the controller 6; the controller 6 has a built-in servo motor and transmission mechanism for driving the pulley 4 to rotate; the touch display 5 is used for information display and realizing test interaction with the user.

[0031] The insulation resistance test assembly includes a positive wiring port 8, a ground wiring port 9, a linkage mechanism 13, a single telescopic mechanism 14, a flat-blade screwdriver measuring head 15, and a measuring head active area 16; the positive wiring port 8 is a universal interface, adapted for the positive test lead connection of common insulation resistance meters on the market; the ground wiring port 9 is an external grounding terminal, which shares the same ground with the insulation resistance meter during operation; the linkage mechanism 13 is used to drive five flat-blade screwdriver measuring heads 15 to move simultaneously on the measuring head active area 16; the single telescopic mechanism 14 can realize the telescopic movement of a single flat-blade screwdriver measuring head according to the instructions issued by the controller 6 to complete the test process; the flat-blade screwdriver measuring head 15 is used for insulation testing of secondary terminal blocks and terminal wiring detection.

[0032] Specifically, an electric push rod is installed in the body of the single telescopic mechanism 14 , and the free end of the electric push rod is connected to the flat-blade screwdriver measuring head 15 .

[0033] Specifically, the linkage mechanism 13 is driven by an electric mechanism in the device body to move in one direction. The linkage mechanism 13 can be driven by an electric push rod to move along the length direction perpendicular to the connecting rod 2. Since the controller 6 can move along the length direction of the connecting rod 2, the linkage mechanism 13 on the controller 6 moves along the length direction perpendicular to the connecting rod 2, thereby realizing the movement of the linkage mechanism 13 at the two free ends, and then through the single telescopic mechanism 14, the flat-blade screwdriver measuring head 15 is moved in the longitudinal direction.

[0034] Specifically, after the device is fixed on the secondary terminal block, the controller 6 moves to the corresponding position on the guide rail 1 through the pulley 4, and the macro camera 12 transmits the secondary terminal block position image information to the controller 6. The controller 6 determines the secondary terminal block position information through the built-in image processing circuit, and drives the servo motor to move the linkage mechanism 13 to realize interface positioning; the controller 6 determines the measurement interval through multiple sets of image comparisons, and uses the pulley 4 to realize the left and right sliding of the device body on the guide rail 1 to complete the measurement of all secondary terminal blocks in the fixtures 10 on both sides.

[0035] Specifically, after the device is connected to the insulation resistance meter and fixed on the secondary terminal block, the controller 6 first performs an instrument self-test to determine whether the device wiring is correct; after the device self-test is qualified, the controller 6 converts the image information into an electrical signal to align the linkage mechanism 13 with the wiring port to be tested; through image comparison, the measurement quantity is confirmed, and the corresponding number of single telescopic mechanisms 14 are driven to push the flat-blade screwdriver measuring head 15 out until it contacts the wiring port to be tested; the flat-blade screwdriver measuring head 15 engages with the screw slot inside the wiring port to be tested by rotation; after confirming that the engagement is tight, the flat-blade screwdriver measuring head 15 simulates the manual tightening torque to test the wiring of the wiring port to be tested; when the wiring test of the wiring port to be tested is completed, the controller 6 uses the multiplexer to select the corresponding flat-blade screwdriver measuring head 15 in turn to achieve rapid measurement of multiple wirings; the test results It will be displayed on the touch display 5. If there are unqualified wiring ports, the macro camera 12 will identify the terminal number, send the terminal number to the touch display 5 and keep it until the user manually clears it, which is convenient for statistical work after the test is completed; when the five groups of flat-blade screwdriver measuring heads 15 have completed the test, the controller 6 will compare the photos taken by multiple groups of macro cameras 12 to identify whether the test is over. If there are still wiring ports to be tested, the pulley 4 will cooperate with the linkage mechanism 13 and the measuring head active area 16 to move the flat-blade screwdriver measuring head 15 to the next group of terminal blocks to be tested until the controller 6 recognizes the image and completes the measurement of all secondary terminal blocks. The built-in buzzer will prompt the user to turn off the external insulation resistance meter switch. After confirming that the switch is turned off, the controller 6 uses the test main circuit to short-circuit the positive wiring port 8 and the ground wiring port 9 to discharge the device.

[0036] Specifically, the above-mentioned device is compatible with common insulation resistance meters on the market; the device is interconnected and interacted with the mobile terminal via Bluetooth, and the user interacts with the device through the mobile terminal to realize remote transmission of information such as mobile speed, test time, and statistics of unqualified terminal information.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention and not to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present invention. They should all be included in the scope of the technical solution for protection of the present invention.

Claims

1. An automatic insulation resistance detection device based on machine vision, characterized by: It consists of three parts: device fixing assembly, machine vision control assembly and insulation resistance test assembly; The device fixing assembly comprises a guide rail (1), a connecting rod (2), a pulley (4), two side fixers (10) and a slot fixer (11); the guide rail (1) is divided into two parts, the left and right parts, the end of the guide rail (1) extends into the hole of the connecting rod to be extended and retracted to adapt to secondary terminal blocks of different lengths, and the device is fixed to both sides of the secondary terminal block by the two side fixers (10); the pulley (4) is slidably connected to the guide slide of the connecting rod (2), the pulley (4) is connected to the controller (6), and five groups of slot fixers (11) are provided on the outside of the connecting rod (2); The mechanical vision control assembly includes a touch display (5), a controller (6), a switch button (7), and a macro camera (12); the switch button (7) controls the power supply of the device; LED lights are provided on both sides of the macro camera (12) to ensure that the light source meets the detection requirements; the macro camera (12) is embedded in the back of the controller (6) and can transmit the captured image to the controller (6); the controller (6) is built with a servo motor and a transmission mechanism for driving the pulley (4) to rotate; the touch display (5) is used for information display and realizing test interaction with the user; The insulation resistance test assembly comprises a positive wiring port (8), a ground wiring port (9), a linkage mechanism (13), a single telescopic mechanism (14), a flat-blade screwdriver measuring head (15), and a measuring head active area (16); the positive wiring port (8) is a universal interface adapted for the positive probe wiring of an insulation resistance meter; the ground wiring port (9) is an external ground terminal, which shares a common ground with the insulation resistance meter during operation; the linkage mechanism (13) is used to drive five flat-blade screwdriver measuring heads (15) to move simultaneously on the measuring head active area (16); the single telescopic mechanism (14) realizes the telescopic movement of a single flat-blade screwdriver measuring head according to the instruction issued by the controller (6) to complete the test process; the flat-blade screwdriver measuring head (15) is used for insulation testing of a secondary terminal block and terminal wiring detection; an electric push rod is installed in the body of the single telescopic mechanism (14), and the free end of the electric push rod is connected to the flat-blade screwdriver measuring head (15); the linkage mechanism (13) is driven to move in one direction by an electric mechanism provided in the device body.

2. The automatic insulation resistance detection device based on machine vision according to claim 1, characterized in that: After the device is fixed on the secondary terminal block, the controller (6) moves to the corresponding position on the guide rail (1) through the pulley (4), and the macro camera (12) transmits the secondary terminal block position image information to the controller (6). The controller (6) determines the secondary terminal block position information through the built-in image processing circuit and drives the servo motor to move the linkage mechanism (13) to realize interface positioning; the controller (6) determines the measurement interval through multiple sets of image comparisons, and uses the pulley (4) to realize the left and right sliding of the device body on the guide rail (1), thereby completing the measurement of all secondary terminal blocks in the fixtures (10) on both sides.

3. The automatic insulation resistance detection device based on machine vision according to claim 2, characterized in that: After the device is connected to the insulation resistance meter and fixed to the secondary terminal block, the controller (6) first performs an instrument self-test to determine whether the device wiring is correct; after the device passes the self-test, the controller (6) converts the image information into an electrical signal to align the linkage mechanism (13) with the wiring port to be tested; through image comparison, the measurement quantity is confirmed, and the corresponding number of single telescopic mechanisms (14) are driven to push the flat screwdriver measuring head (15) out until it contacts the wiring port to be tested; the flat screwdriver measuring head (15) is engaged with the screw slot inside the wiring port to be tested by rotation; after confirming that the engagement is tight, the flat screwdriver measuring head (15) simulates the manual tightening torque to test the wiring of the wiring port to be tested; when the wiring test of the wiring port to be tested is completed, the controller (6) uses the multi-way selector to select the corresponding flat screwdriver measuring head (15) in turn to achieve multi-way wiring fast measurement; the test result will be displayed on the touch screen On the display (5), if there is an unqualified wiring port, the macro camera (12) will identify the terminal number, send the terminal number to the touch display (5) and keep it until the user manually clears it, so as to facilitate the statistical work after the test is completed; when the five groups of slotted screwdriver measuring heads (15) have completed the test, the controller (6) will compare the photos taken by multiple groups of macro cameras (12) to identify whether the test is completed. If there are still wiring ports to be tested, the pulley (4) will cooperate with the linkage mechanism (13) and the measuring head active area (16) to move the slotted screwdriver measuring head (15) to the next group of terminal blocks to be tested until the controller (6) recognizes the image and completes the measurement of all secondary terminal blocks. The built-in buzzer prompts the user to cut off the external insulation resistance meter switch. After confirming that the switch is cut off, the controller (6) uses the test main circuit to short-circuit the positive wiring port (8) and the ground wiring port (9) to achieve device discharge.

4. The automatic insulation resistance detection device based on machine vision according to claim 3 is characterized in that: The device is adapted to an insulation resistance meter; the device is interconnected and interactive with a mobile terminal via Bluetooth, and a user interacts with the device via the mobile terminal to achieve remote transmission of mobile speed, test time, and statistics of unqualified terminal information.

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