CN110657965B - High-voltage circuit breaker mechanical characteristic detection method and device based on image recognition - Google Patents
High-voltage circuit breaker mechanical characteristic detection method and device based on image recognition Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
- G01R31/3272—Apparatus, systems or circuits therefor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
- G01R31/3272—Apparatus, systems or circuits therefor
- G01R31/3274—Details related to measuring, e.g. sensing, displaying or computing; Measuring of variables related to the contact pieces, e.g. wear, position or resistance
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
- G01R31/3275—Fault detection or status indication
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/0002—Inspection of images, e.g. flaw detection
- G06T7/0004—Industrial image inspection
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/20—Analysis of motion
- G06T7/246—Analysis of motion using feature-based methods, e.g. the tracking of corners or segments
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/10—Image acquisition modality
- G06T2207/10016—Video; Image sequence
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/30—Subject of image; Context of image processing
- G06T2207/30108—Industrial image inspection
- G06T2207/30164—Workpiece; Machine component
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/30—Subject of image; Context of image processing
- G06T2207/30241—Trajectory
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Abstract
The invention relates to the technical field of power equipment maintenance, in particular to a high-voltage circuit breaker mechanical characteristic detection method based on image recognition, which comprises the following steps: A) capturing an image of a moving part; B) obtaining an image shot by a high-speed camera; C) collecting and storing images shot by a high-speed camera at a frequency F, and marking a timestamp; D) and performing image recognition to obtain displacement data of the moving part and obtain the mechanical characteristics of the moving part. The substantial effects of the invention are as follows: by image acquisition and identification, the track of each mechanical part and the speed of each track of the high-voltage circuit breaker in the switching-on and switching-off process can be quickly obtained, so that the mechanical characteristics of the high-voltage circuit breaker are obtained, and the mechanical characteristic test of the high-voltage circuit breaker is completed; the safety of the test process is improved.
Description
Technical Field
The invention relates to the technical field of power equipment maintenance, in particular to a method and a device for detecting mechanical characteristics of a high-voltage circuit breaker based on image recognition.
Background
The high-voltage circuit breaker can not only cut off or close the no-load current and the load current in the high-voltage circuit, but also cut off the overload current and the short-circuit current through the action of a relay protection device when the system has a fault, and has a quite perfect arc extinguishing structure and enough current breaking capacity. The main structure of the high-voltage circuit breaker is mainly divided into a flow guiding part, an arc extinguishing part, an insulating part and an operating mechanism part. The main types of the high-voltage switch are divided into an oil circuit breaker, an air circuit breaker, a vacuum circuit breaker, a sulfur hexafluoride circuit breaker, a solid gas production circuit breaker and a magnetic blow-out circuit breaker according to arc extinguishing media. The high-voltage circuit breaker plays a role in protection and control in a power grid, and when the high-voltage circuit breaker breaks down or fails, the high-voltage circuit breaker causes a power grid accident or enlarges accidents, so that the high-voltage circuit breaker causes considerable economic and other losses. According to the research results of CIGRE and China electric academy of sciences, the mechanical fault accounts for nearly 37% of the faults of the switch equipment, so that the detection of the mechanical fault of the switch equipment is extremely necessary. However, the existing detection mode of the high-voltage circuit breaker has the technical problems of low efficiency, complex detection process and inaccurate judgment of maintenance results for the mechanical characteristics of the high-voltage circuit breaker.
Like chinese patent CN103986084A, published 2014 8 months and 13 days, a high voltage circuit breaker mechanism case mobile maintenance platform relates to the transformer substation equipment field, includes mobile device, maintenance platform and regulation strutting arrangement, maintenance platform is portable to be set up on the mobile device, it can dismantle with the mobile device and be connected to adjust strutting arrangement for realize the regulation and the fixed stay of mobile device vertical height. The device can move to circuit breaker mechanism incasement in a flexible way, provides the maintenance platform that the subassembly was dismantled, installed, adapts to the subassembly of big quality, bulky and overhauls, adjusts the focus at any time, and it is convenient to remove. But it still relies on the manual work to carry out the subassembly to high voltage circuit breaker and dismantles just can carry out mechanical characteristics's detection, can not solve the technical problem that mechanical characteristics detection efficiency is low.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the technical problem that the detection efficiency of the mechanical characteristics of the high-voltage circuit breaker is low at present is solved. The non-contact type high-voltage circuit breaker mechanical characteristic detection method and device based on image recognition are provided.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a high-voltage circuit breaker mechanical characteristic detection method based on image recognition comprises the following steps: A) the high-voltage circuit breaker is internally provided with a light source, a plurality of high-speed cameras, an MCU (microprogrammed control unit), a power supply interface and a data interface, and the high-speed cameras are aligned to a moving part of the high-voltage circuit breaker and shoot images of the moving part; B) the power supply interface is communicated to enable the built-in light source, the high-speed camera and the MCU to work, and images shot by the high-speed camera are obtained through the data interface and the MCU; C) switching on and off, collecting and storing images shot by the high-speed camera at a frequency F, and marking the images with time stamps; D) and identifying each image to obtain displacement data of the moving part, associating the displacement data with the corresponding timestamp to form characteristic points, and performing interpolation fitting on the characteristic points to obtain a moving track of the moving part and the speed of each point of the track, so as to obtain the mechanical characteristics of the moving part.
Preferably, the method further comprises the following steps: E) testing the life cycle; the life cycle test comprises the following steps: E1) the method comprises the steps that a test high-voltage circuit breaker is obtained, a light source, a plurality of high-speed cameras, an MCU, a power supply interface and a data interface are arranged in the test high-voltage circuit breaker under a laboratory condition, the high-speed cameras are aligned to a moving part of the high-voltage circuit breaker and shoot images of the moving part, the high-speed cameras and the data interface are connected with the MCU, and the power supply interface supplies power to the high-speed cameras and the MCU; E2) continuously performing mechanical characteristic tests on the tested high-voltage circuit breaker, acquiring image data shot by a high-speed camera until the tested high-voltage circuit breaker breaks down, and recording the total mechanical characteristic test times N; E3) extracting the motion trail of each moving part and the speed on the track point in each test in the test process as reference data; E4) and (N-N) is used as the remaining life cycle of the high-voltage circuit breaker to be detected.
Preferably, the method further comprises the following steps: F) analyzing mechanical faults of the high-voltage circuit breaker; the analysis of the mechanical fault of the high-voltage circuit breaker comprises the following steps: F1) the method comprises the steps that a test high-voltage circuit breaker is obtained, a light source, a plurality of high-speed cameras, an MCU, a power supply interface and a data interface are arranged in the test high-voltage circuit breaker under a laboratory condition, the high-speed cameras are aligned to a moving part of the high-voltage circuit breaker and shoot images of the moving part, the high-speed cameras and the data interface are connected with the MCU, and the power supply interface supplies power to the high-speed cameras and the MCU; F2) carrying out mechanical characteristic tests on the tested high-voltage circuit breaker for a plurality of times; F3) according to the maintenance requirements of mechanical parts of the high-voltage circuit breaker, selecting one maintenance requirement to enable the maintenance requirement not to reach the standard, continuously carrying out mechanical characteristic tests until the high-voltage circuit breaker is tested to have a fault, recording the motion track and the speed on a track point of each motion part in the mechanical characteristic tests for s times before the fault occurs, and associating the motion track and the speed on the track point with the fault to serve as fault reference data; F4) after the high-voltage circuit breaker is repaired, selecting the next maintenance requirement and repeating the step F3 until all maintenance requirements are traversed; F5) and obtaining the track of the moving part of the high-voltage circuit breaker to be detected and the speed on the track point as detection data, comparing the detection data with the fault reference data to obtain a fault corresponding to the fault reference data closest to the detection data, and taking the fault as a mechanical fault analysis result of the high-voltage circuit breaker to be detected.
Preferably, the method further comprises the following steps: G) early warning of mechanical faults of the high-voltage circuit breaker; the high-voltage circuit breaker mechanical fault early warning comprises the following steps: G1) the method comprises the steps that a test high-voltage circuit breaker is obtained, a light source, a plurality of high-speed cameras, an MCU, a power supply interface and a data interface are arranged in the test high-voltage circuit breaker under a laboratory condition, the high-speed cameras are aligned to a moving part of the high-voltage circuit breaker and shoot images of the moving part, the high-speed cameras and the data interface are connected with the MCU, and the power supply interface supplies power to the high-speed cameras and the MCU; G2) carrying out mechanical characteristic tests on the tested high-voltage circuit breaker for a plurality of times; G3) according to the maintenance requirements of mechanical parts of the high-voltage circuit breaker, selecting one maintenance requirement to enable the maintenance requirement not to reach the standard, continuously carrying out a mechanical characteristic test until the high-voltage circuit breaker is tested to have a fault, recording the motion track and the speed on a track point of each moving part in the mechanical characteristic test from r times to s times before the fault occurs, wherein r is greater than s, and associating the motion track and the speed on the track point with the fault to be used as fault early warning data; G4) after the high-voltage circuit breaker is repaired, selecting the next maintenance requirement, and repeating the step G3 until all maintenance requirements are traversed; G5) and obtaining the track of the moving part of the high-voltage circuit breaker to be detected and the speed on the track point as detection data, comparing the detection data with the fault early warning data to obtain a fault corresponding to the fault early warning data closest to the detection data, and taking the fault as a mechanical fault early warning result of the high-voltage circuit breaker to be detected.
Preferably, the mechanical characteristics include closing time, opening time, closing speed, opening speed, maximum speed of the movable contact, average speed of the movable contact, action time of the movable contact, bounce time, bounce frequency, maximum bounce amplitude, opening and closing stroke, and dynamic curve of time speed stroke in the opening and closing stroke of the movable contact.
Preferably, the step a further includes that a plurality of photoelectric displacement sensors and a wireless communication module are arranged in the high-voltage circuit breaker, the photoelectric displacement sensors detect displacement and vibration of moving parts of the high-voltage circuit breaker, and the photoelectric displacement sensors are connected with the wireless communication module.
Alternatively, the method also comprises the following steps: f') analyzing the mechanical fault of the high-voltage circuit breaker; the analysis of the mechanical fault of the high-voltage circuit breaker comprises the following steps: f' 1) obtaining a test high-voltage circuit breaker, under the condition of a laboratory, arranging a light source, a plurality of high-speed cameras, an MCU, a power supply interface, a plurality of photoelectric displacement sensors and a wireless communication module in the test high-voltage circuit breaker, wherein the high-speed cameras are aligned to moving parts of the high-voltage circuit breaker and shoot images of the moving parts, the photoelectric displacement sensors detect displacement and vibration of the moving parts of the high-voltage circuit breaker, the power supply interface supplies power for the high-speed cameras, the photoelectric displacement sensors and the MCU, and the high-speed cameras, the wireless communication module and the photoelectric displacement sensors are all connected with the MCU; f' 2) carrying out mechanical characteristic tests on the tested high-voltage circuit breaker for a plurality of times; f' 3) selecting one maintenance requirement to enable the maintenance requirement not to reach the standard according to the maintenance requirement of the mechanical part of the high-voltage circuit breaker, continuously carrying out mechanical characteristic tests until the high-voltage circuit breaker is tested to have a fault, recording the motion track of each moving part, the speed on a track point and the vibration data of a stroke end point in the mechanical characteristic tests for s times before the fault occurs, and associating the motion track, the speed on the track point and the vibration data with the fault to be used as fault reference data; f '4) after repairing the high-voltage circuit breaker, selecting the next maintenance requirement and repeating the step F' 3 until all maintenance requirements are traversed; f' 5) obtaining the motion track of the moving part of the high-voltage circuit breaker to be detected, the speed on the track point and the vibration data of the stroke end point as detection data, comparing the detection data with fault reference data to obtain a fault corresponding to the fault reference data closest to the detection data, and taking the fault as a mechanical fault analysis result of the high-voltage circuit breaker to be detected.
Alternatively, the method also comprises the following steps: g') early warning of mechanical faults of the high-voltage circuit breaker; the high-voltage circuit breaker mechanical fault early warning comprises the following steps: g' 1) obtaining a test high-voltage circuit breaker, under the condition of a laboratory, arranging a light source, a plurality of high-speed cameras, an MCU, a power supply interface, a plurality of photoelectric displacement sensors and a wireless communication module in the test high-voltage circuit breaker, wherein the high-speed cameras are aligned to moving parts of the high-voltage circuit breaker and shoot images of the moving parts, the photoelectric displacement sensors detect displacement and vibration of the moving parts of the high-voltage circuit breaker, the power supply interface supplies power for the high-speed cameras, the photoelectric displacement sensors and the MCU, and the high-speed cameras, the wireless communication module and the photoelectric displacement sensors are all connected with the MCU; g' 2) carrying out mechanical characteristic tests on the tested high-voltage circuit breaker for a plurality of times; g' 3) selecting one maintenance requirement to enable the maintenance requirement not to reach the standard according to the maintenance requirement of the mechanical part of the high-voltage circuit breaker, continuously carrying out a mechanical characteristic test until the high-voltage circuit breaker is tested to have a fault, recording the motion track of each moving part, the speed on a track point and the vibration data of a stroke end point in the mechanical characteristic test from r times to s times before the fault occurs, and associating the motion track, the speed on the track point and the vibration data of the stroke end point with the fault to serve as fault early warning data; g '4) after repairing the high-voltage circuit breaker, selecting the next maintenance requirement and repeating the step G' 3 until all maintenance requirements are traversed; G5) and obtaining the motion track of the moving part of the high-voltage circuit breaker to be detected, the speed on the track point and the vibration data of the stroke end point as detection data, comparing the detection data with the fault early warning data to obtain a fault corresponding to the fault early warning data closest to the detection data, and taking the fault as a mechanical fault early warning result of the high-voltage circuit breaker to be detected.
The device comprises a data processing unit, a memory, a communication unit, a power supply unit, a data acquisition unit, a light source, a plurality of high-speed cameras, an MCU (micro control unit), a power supply interface, a plurality of photoelectric displacement sensors and a wireless communication module, wherein the power supply unit is connected with the power supply interface, the data acquisition unit comprises a data reading interface connected with the data interface and a communication module in communication connection with the wireless communication module, and the memory, the communication unit, the data reading interface and the communication module are all connected with the data processing unit.
Preferably, the photoelectric displacement sensor comprises a laser emitter, a current-limiting resistor, a photoresistor, a power supply module, a reflective sticker, a voltage sensor and a communication module, wherein the laser emitter is fixedly installed in a shell of the high-voltage circuit breaker and is aligned to an alignment point on the outer surface of the mechanical motion component along a normal direction, an included angle is formed between emergent light of the laser emitter and the normal direction of the outer surface of the mechanical motion component through adjustment, in the stroke of the mechanical motion component, the alignment point of the laser emitter moves along the outer surface of the mechanical motion component to form a moving range, the reflective sticker is attached to the mechanical motion component and covers the moving range of the alignment point, the reflective sticker is provided with a plurality of high reflection areas which are arranged at equal intervals along the stroke of the mechanical motion component, a low reflection area is arranged between adjacent high reflection areas, the width of the high reflection area is equal to that of the low reflection, the photoresistor is installed and the other side that laser emitter is symmetrical about the outer surface normal of mechanical motion part, and photoresistor one end ground connection, the other end passes through current-limiting resistor and is connected with power module, and voltage sensor gathers the voltage of photoresistor and current-limiting resistor tie point, and voltage sensor is connected with communication module.
The substantial effects of the invention are as follows: by image acquisition and identification, the track of each mechanical part and the speed of each track of the high-voltage circuit breaker in the switching-on and switching-off process can be quickly obtained, so that the mechanical characteristics of the high-voltage circuit breaker are obtained, and the mechanical characteristic test of the high-voltage circuit breaker is completed; through built-in image acquisition's equipment, when testing next time, only need switch-on power supply interface and data interface can, need not to pull down the backplate, test equipment such as installation displacement sensor for mechanical properties test efficiency improves the security of experimentation.
Drawings
FIG. 1 is a block diagram of a method for detecting mechanical properties according to an embodiment.
FIG. 2 is a block diagram of a life cycle testing process according to an embodiment.
Fig. 3 is a block diagram of a mechanical fault analysis process of a high-voltage circuit breaker according to an embodiment.
Fig. 4 is a block diagram of a mechanical failure early warning process according to an embodiment.
FIG. 5 is a schematic structural diagram of an apparatus for detecting mechanical characteristics according to an embodiment.
Fig. 6 is a schematic structural diagram of a non-contact displacement sensor according to an embodiment.
Fig. 7 and 8 are schematic diagrams of a noncontact displacement sensor according to an embodiment of the present invention.
Wherein: 1. the device comprises a linear reflection sticker, 2, a laser transmitter, 3, a cylindrical surface reflection sticker, 4, a cam, 5, a cylindrical end surface reflection sticker, 6, a moving part, 7, an alignment dot track, 8, an arc reflection sticker, 100, a voltage sensor, 200, a wireless communication module, 300, a photoelectric displacement sensor, 400, a data acquisition unit, 500, a high-speed camera, 600, a power supply interface, 700, a power supply unit, 800, an MCU, 900, a data interface, 1000, a data processing unit, 1100 and a memory.
Detailed Description
The following provides a more detailed description of the present invention, with reference to the accompanying drawings.
The first embodiment is as follows:
a method for detecting mechanical characteristics of a high-voltage circuit breaker based on image recognition is disclosed, as shown in figure 1, and comprises the following steps: A) a light source, a plurality of high-speed cameras 500, an MCU 800, a power supply interface 600 and a data interface 900 are arranged in the high-voltage circuit breaker, and the high-speed cameras 500 are aligned to moving parts of the high-voltage circuit breaker to shoot images of the moving parts.
B) The power supply interface 600 is connected to enable the built-in light source, the high-speed camera 500 and the MCU 800 to operate, and the image captured by the high-speed camera 500 is obtained through the data interface 900 and the MCU 800.
C) And (4) switching on and off, collecting and storing the image shot by the high-speed camera 500 at the frequency F, and marking the image with a timestamp.
D) And identifying each image to obtain displacement data of the moving part, associating the displacement data with the corresponding timestamp to form characteristic points, and performing interpolation fitting on the characteristic points to obtain a moving track of the moving part and the speed of each point of the track, so as to obtain the mechanical characteristics of the moving part. The mechanical characteristics comprise closing time, opening time, closing speed, opening speed, maximum speed of the movable contact, average speed of the movable contact, action time of the movable contact, bounce time, bounce times, maximum bounce amplitude, opening and closing stroke and a time-speed-stroke dynamic curve in the opening and closing stroke of the movable contact.
E) Testing the life cycle; as shown in fig. 2, the life cycle test includes: E1) obtaining a test high-voltage circuit breaker, under the condition of a laboratory, arranging a light source, a plurality of high-speed cameras 500, an MCU 800, a power supply interface 600 and a data interface 900 in the test high-voltage circuit breaker, wherein the high-speed cameras 500 are aligned with moving parts of the high-voltage circuit breaker to shoot images of the moving parts, the high-speed cameras 500 and the data interface 900 are both connected with the MCU 800, and the power supply interface 600 supplies power to the high-speed cameras 500 and the MCU 800; E2) continuously performing mechanical characteristic tests on the tested high-voltage circuit breaker, acquiring image data shot by the high-speed camera 500 until the tested high-voltage circuit breaker breaks down, and recording the total mechanical characteristic test times N; E3) extracting the motion trail of each moving part and the speed on the track point in each test in the test process as reference data; E4) and (N-N) is used as the remaining life cycle of the high-voltage circuit breaker to be detected.
F) Analyzing mechanical faults of the high-voltage circuit breaker; as shown in fig. 3, the mechanical fault analysis of the high-voltage circuit breaker includes: F1) obtaining a test high-voltage circuit breaker, under the condition of a laboratory, arranging a light source, a plurality of high-speed cameras 500, an MCU 800, a power supply interface 600 and a data interface 900 in the test high-voltage circuit breaker, wherein the high-speed cameras 500 are aligned with moving parts of the high-voltage circuit breaker to shoot images of the moving parts, the high-speed cameras 500 and the data interface 900 are both connected with the MCU 800, and the power supply interface 600 supplies power to the high-speed cameras 500 and the MCU 800; F2) carrying out mechanical characteristic tests on the tested high-voltage circuit breaker for a plurality of times; F3) according to the maintenance requirements of mechanical parts of the high-voltage circuit breaker, selecting one maintenance requirement to enable the maintenance requirement not to reach the standard, continuously carrying out mechanical characteristic tests until the high-voltage circuit breaker is tested to have a fault, recording the motion track and the speed on a track point of each motion part in the mechanical characteristic tests for s times before the fault occurs, and associating the motion track and the speed on the track point with the fault to serve as fault reference data; F4) after the high-voltage circuit breaker is repaired, selecting the next maintenance requirement and repeating the step F3 until all maintenance requirements are traversed; F5) and obtaining the track of the moving part of the high-voltage circuit breaker to be detected and the speed on the track point as detection data, comparing the detection data with the fault reference data to obtain a fault corresponding to the fault reference data closest to the detection data, and taking the fault as a mechanical fault analysis result of the high-voltage circuit breaker to be detected.
G) Early warning of mechanical faults of the high-voltage circuit breaker; as shown in fig. 4, the high voltage circuit breaker mechanical fault early warning includes: G1) obtaining a test high-voltage circuit breaker, under the condition of a laboratory, arranging a light source, a plurality of high-speed cameras 500, an MCU 800, a power supply interface 600 and a data interface 900 in the test high-voltage circuit breaker, wherein the high-speed cameras 500 are aligned with moving parts of the high-voltage circuit breaker to shoot images of the moving parts, the high-speed cameras 500 and the data interface 900 are both connected with the MCU 800, and the power supply interface 600 supplies power to the high-speed cameras 500 and the MCU 800; G2) carrying out mechanical characteristic tests on the tested high-voltage circuit breaker for a plurality of times; G3) according to the maintenance requirements of mechanical parts of the high-voltage circuit breaker, selecting one maintenance requirement to enable the maintenance requirement not to reach the standard, continuously carrying out a mechanical characteristic test until the high-voltage circuit breaker is tested to have a fault, recording the motion track and the speed on a track point of each moving part in the mechanical characteristic test from r times to s times before the fault occurs, wherein r is greater than s, and associating the motion track and the speed on the track point with the fault to be used as fault early warning data; G4) after the high-voltage circuit breaker is repaired, selecting the next maintenance requirement, and repeating the step G3 until all maintenance requirements are traversed; G5) and obtaining the track of the moving part of the high-voltage circuit breaker to be detected and the speed on the track point as detection data, comparing the detection data with the fault early warning data to obtain a fault corresponding to the fault early warning data closest to the detection data, and taking the fault as a mechanical fault early warning result of the high-voltage circuit breaker to be detected.
A device for detecting mechanical characteristics of a high-voltage circuit breaker based on image recognition is shown in FIG. 5 and comprises a data processing unit 1000, a memory 1100, a communication unit, a power supply unit 700, a data acquisition unit 400, a light source, a plurality of high-speed cameras 500, an MCU 800, a power supply interface 600, a plurality of photoelectric displacement sensors 300 and a wireless communication module, wherein the power supply unit 700 is connected with the power supply interface 600, the data acquisition unit 400 comprises a data reading interface connected with the data interface 900 and a communication module in communication connection with the wireless communication module, and the memory 1100, the communication unit, the data reading interface and the communication module are all connected with the data processing unit 1000. A plurality of photoelectric displacement sensors 300 and a wireless communication module are arranged in the high-voltage circuit breaker, the photoelectric displacement sensors 300 detect displacement and vibration of moving parts of the high-voltage circuit breaker, and the photoelectric displacement sensors 300 are connected with the wireless communication module.
As shown in fig. 6, the non-contact displacement sensor includes a laser emitter 2, a current limiting resistor, a photo resistor, a power supply module, a reflective sticker, a voltage sensor 100 and a wireless communication module 200, the laser emitter 2 is fixedly installed in a housing of the high voltage circuit breaker, an alignment point of an outer surface of the mechanical motion component 6 is aligned in a normal direction, an angle is formed between an emergent light of the laser emitter 2 and the normal direction of the outer surface of the mechanical motion component 6 by adjusting, in a stroke of the mechanical motion component 6, the alignment point of the laser emitter 2 moves along the outer surface of the mechanical motion component 6 to form a moving range, the reflective sticker is attached to the mechanical motion component 6 and covers the moving range of the alignment point, the reflective sticker has a plurality of high reflection areas arranged at equal intervals along the stroke of the mechanical motion component 6, a low reflection area is arranged between adjacent high reflection areas, and the width, the diameter of the light spot of the laser emitter 2 is equal to integral multiple of the interval width, the photoresistor is arranged on the other side of the laser emitter 2 which is symmetrical with the outer surface of the mechanical motion part 6 in the normal direction, one end of the photoresistor is grounded, the other end of the photoresistor is connected with the power supply module through the current-limiting resistor, the voltage sensor 100 collects the voltage of the connecting point of the photoresistor and the current-limiting resistor, and the voltage sensor 100 is connected with the wireless communication. Fig. 6 shows a linear reflective sticker 1, wherein a mechanical moving part 6 to be detected moves linearly, such as a moving contact, an unlocking lock catch and the like. As shown in fig. 7, when the non-contact displacement detection of the displacement is performed on the rotating member, such as the shaft and the cam 4, the cylindrical reflective sticker 3 may be attached to the outer surface of the shaft or the equal radius arc portion of the cam 4, so that the distance between the high reflection area and the low reflection area in the figure is distorted to avoid the blurring of the picture. When the arc portion of the cam 4 with the same radius is also the working surface, the cylindrical end surface reflection sticker 5 may be attached to the end surface of the cam 4. As shown in fig. 8, when the moving component 6 to be detected has a complex planar motion, that is, both a translational motion and a rotational motion are involved, a suitable alignment point is selected on the moving component 6 to be detected, so that the alignment point is always on the moving component 6 during the stroke of the moving component 6, the alignment point track 7 will be an arc, a suitable arc-shaped reflective sticker 8 is attached, the arc-shaped reflective sticker 8 is provided with high-reflection areas and low-reflection areas at intervals along the arc, and the edges of the high-reflection areas and the low-reflection areas are perpendicular to the arc at the corresponding position. The present embodiment provides an implementation of a non-contact displacement sensor, which is well known in the art for detecting vibration and displacement, and those skilled in the art can design other types of non-contact displacement sensors to perform displacement detection.
Example two:
in this embodiment, on the basis of the first embodiment, the steps F) and G) are further improved to form steps F ') and G'), respectively, wherein the steps of: f') analyzing the mechanical fault of the high-voltage circuit breaker; the analysis of the mechanical fault of the high-voltage circuit breaker comprises the following steps: f' 1) obtaining a test high-voltage circuit breaker, under the condition of a laboratory, arranging a light source, a plurality of high-speed cameras 500, an MCU 800, a power supply interface 600, a plurality of photoelectric displacement sensors 300 and a wireless communication module in the test high-voltage circuit breaker, wherein the high-speed cameras 500 are aligned to moving parts of the high-voltage circuit breaker to shoot images of the moving parts, the photoelectric displacement sensors 300 are used for detecting the displacement and vibration of the moving parts of the high-voltage circuit breaker, the power supply interface 600 is used for supplying power to the high-speed cameras 500, the photoelectric displacement sensors 300 and the MCU 800, and the high-speed cameras 500, the wireless communication module and the photoelectric displacement sensors 300 are all connected with the MCU 800; f' 2) carrying out mechanical characteristic tests on the tested high-voltage circuit breaker for a plurality of times; f' 3) selecting one maintenance requirement to enable the maintenance requirement not to reach the standard according to the maintenance requirement of the mechanical part of the high-voltage circuit breaker, continuously carrying out mechanical characteristic tests until the high-voltage circuit breaker is tested to have a fault, recording the motion track of each moving part, the speed on a track point and the vibration data of a stroke end point in the mechanical characteristic tests for s times before the fault occurs, and associating the motion track, the speed on the track point and the vibration data with the fault to be used as fault reference data; f '4) after repairing the high-voltage circuit breaker, selecting the next maintenance requirement and repeating the step F' 3 until all maintenance requirements are traversed; f' 5) obtaining the motion track of the moving part of the high-voltage circuit breaker to be detected, the speed on the track point and the vibration data of the stroke end point as detection data, comparing the detection data with fault reference data to obtain a fault corresponding to the fault reference data closest to the detection data, and taking the fault as a mechanical fault analysis result of the high-voltage circuit breaker to be detected.
The method comprises the following steps: g') early warning of mechanical faults of the high-voltage circuit breaker; the high-voltage circuit breaker mechanical fault early warning comprises the following steps: g' 1) obtaining a test high-voltage circuit breaker, under the condition of a laboratory, arranging a light source, a plurality of high-speed cameras 500, an MCU 800, a power supply interface 600, a plurality of photoelectric displacement sensors 300 and a wireless communication module in the test high-voltage circuit breaker, wherein the high-speed cameras 500 are aligned to moving parts of the high-voltage circuit breaker and shoot images of the moving parts, the photoelectric displacement sensors 300 detect the displacement and vibration of the moving parts of the high-voltage circuit breaker, the power supply interface 600 supplies power to the high-speed cameras 500, the photoelectric displacement sensors 300 and the MCU 800, and the high-speed cameras 500, the wireless communication module and the photoelectric displacement sensors 300 are all connected with the MCU 800; g' 2) carrying out mechanical characteristic tests on the tested high-voltage circuit breaker for a plurality of times; g' 3) selecting one maintenance requirement to enable the maintenance requirement not to reach the standard according to the maintenance requirement of the mechanical part of the high-voltage circuit breaker, continuously carrying out a mechanical characteristic test until the high-voltage circuit breaker is tested to have a fault, recording the motion track of each moving part, the speed on a track point and the vibration data of a stroke end point in the mechanical characteristic test from r times to s times before the fault occurs, and associating the motion track, the speed on the track point and the vibration data of the stroke end point with the fault to serve as fault early warning data; g '4) after repairing the high-voltage circuit breaker, selecting the next maintenance requirement and repeating the step G' 3 until all maintenance requirements are traversed; G5) and obtaining the motion track of the moving part of the high-voltage circuit breaker to be detected, the speed on the track point and the vibration data of the stroke end point as detection data, comparing the detection data with the fault early warning data to obtain a fault corresponding to the fault early warning data closest to the detection data, and taking the fault as a mechanical fault early warning result of the high-voltage circuit breaker to be detected.
The above-described embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any way, and other variations and modifications may be made without departing from the spirit of the invention as set forth in the claims.
Claims (9)
1. A method for detecting mechanical characteristics of a high-voltage circuit breaker based on image recognition is characterized in that,
the method comprises the following steps:
A) the high-voltage circuit breaker is internally provided with a light source, a plurality of high-speed cameras, an MCU (microprogrammed control unit), a power supply interface and a data interface, and the high-speed cameras are aligned to a moving part of the high-voltage circuit breaker and shoot images of the moving part;
B) the power supply interface is communicated to enable the built-in light source, the high-speed camera and the MCU to work, and images shot by the high-speed camera are obtained through the data interface and the MCU;
C) switching on and off, collecting and storing images shot by the high-speed camera at a frequency F, and marking the images with time stamps;
D) identifying each image to obtain displacement data of the moving part, associating the displacement data with a corresponding timestamp to form characteristic points, and performing interpolation fitting on the characteristic points to obtain a moving track of the moving part and speeds of all points of the track so as to obtain mechanical characteristics of the moving part;
further comprising the steps of:
E) testing the life cycle;
the life cycle test comprises the following steps:
E1) the method comprises the steps that a test high-voltage circuit breaker is obtained, a light source, a plurality of high-speed cameras, an MCU, a power supply interface and a data interface are arranged in the test high-voltage circuit breaker under a laboratory condition, the high-speed cameras are aligned to a moving part of the high-voltage circuit breaker and shoot images of the moving part, the high-speed cameras and the data interface are connected with the MCU, and the power supply interface supplies power to the high-speed cameras and the MCU;
E2) continuously performing mechanical characteristic tests on the tested high-voltage circuit breaker, acquiring image data shot by a high-speed camera until the tested high-voltage circuit breaker breaks down, and recording the total mechanical characteristic test times N;
E3) extracting the motion trail of each moving part and the speed on the track point in each test in the test process as reference data;
E4) and obtaining the track of the moving part of the high-voltage circuit breaker to be detected and the speed on the track point as detection data, obtaining the test times N corresponding to the reference data closest to the detection data, and taking N-N as the remaining life cycle of the high-voltage circuit breaker to be detected.
2. The method for detecting the mechanical characteristic of the high-voltage circuit breaker based on the image recognition is characterized in that,
further comprising the steps of:
F) analyzing mechanical faults of the high-voltage circuit breaker;
the analysis of the mechanical fault of the high-voltage circuit breaker comprises the following steps:
F1) the method comprises the steps that a test high-voltage circuit breaker is obtained, a light source, a plurality of high-speed cameras, an MCU, a power supply interface and a data interface are arranged in the test high-voltage circuit breaker under a laboratory condition, the high-speed cameras are aligned to a moving part of the high-voltage circuit breaker and shoot images of the moving part, the high-speed cameras and the data interface are connected with the MCU, and the power supply interface supplies power to the high-speed cameras and the MCU;
F2) carrying out mechanical characteristic tests on the tested high-voltage circuit breaker for a plurality of times;
F3) according to the maintenance requirements of mechanical parts of the high-voltage circuit breaker, selecting one maintenance requirement to enable the maintenance requirement not to reach the standard, continuously carrying out mechanical characteristic tests until the high-voltage circuit breaker is tested to have a fault, recording the motion track and the speed on a track point of each motion part in the mechanical characteristic tests for s times before the fault occurs, and associating the motion track and the speed on the track point with the fault to serve as fault reference data;
F4) after the high-voltage circuit breaker is repaired, selecting the next maintenance requirement and repeating the step F3 until all maintenance requirements are traversed;
F5) and obtaining the track of the moving part of the high-voltage circuit breaker to be detected and the speed on the track point as detection data, comparing the detection data with the fault reference data to obtain a fault corresponding to the fault reference data closest to the detection data, and taking the fault as a mechanical fault analysis result of the high-voltage circuit breaker to be detected.
3. The method for detecting the mechanical characteristic of the high-voltage circuit breaker based on the image recognition is characterized in that,
further comprising the steps of:
G) early warning of mechanical faults of the high-voltage circuit breaker;
the high-voltage circuit breaker mechanical fault early warning comprises the following steps:
G1) the method comprises the steps that a test high-voltage circuit breaker is obtained, a light source, a plurality of high-speed cameras, an MCU, a power supply interface and a data interface are arranged in the test high-voltage circuit breaker under a laboratory condition, the high-speed cameras are aligned to a moving part of the high-voltage circuit breaker and shoot images of the moving part, the high-speed cameras and the data interface are connected with the MCU, and the power supply interface supplies power to the high-speed cameras and the MCU;
G2) carrying out mechanical characteristic tests on the tested high-voltage circuit breaker for a plurality of times;
G3) according to the maintenance requirements of mechanical parts of the high-voltage circuit breaker, selecting one maintenance requirement to enable the maintenance requirement not to reach the standard, continuously carrying out a mechanical characteristic test until the high-voltage circuit breaker is tested to have a fault, recording the motion track and the speed on a track point of each moving part in the mechanical characteristic test from r times to s times before the fault occurs, wherein r is greater than s, and associating the motion track and the speed on the track point with the fault to be used as fault early warning data;
G4) after the high-voltage circuit breaker is repaired, selecting the next maintenance requirement, and repeating the step G3 until all maintenance requirements are traversed;
G5) and obtaining the track of the moving part of the high-voltage circuit breaker to be detected and the speed on the track point as detection data, comparing the detection data with the fault early warning data to obtain a fault corresponding to the fault early warning data closest to the detection data, and taking the fault as a mechanical fault early warning result of the high-voltage circuit breaker to be detected.
4. The method for detecting the mechanical characteristic of the high-voltage circuit breaker based on the image recognition is characterized in that,
the mechanical characteristics comprise closing time, opening time, closing speed, opening speed, maximum speed of the movable contact, average speed of the movable contact, action time of the movable contact, bounce time, bounce times, maximum bounce amplitude, opening and closing stroke and a time speed stroke dynamic curve in the opening and closing stroke of the movable contact.
5. The method for detecting the mechanical characteristic of the high-voltage circuit breaker based on the image recognition is characterized in that,
the step A also comprises the step of arranging a plurality of photoelectric displacement sensors and a wireless communication module in the high-voltage circuit breaker, wherein the photoelectric displacement sensors detect the displacement and vibration of the moving parts of the high-voltage circuit breaker and are connected with the wireless communication module.
6. The method for detecting the mechanical property of the high-voltage circuit breaker based on the image recognition is characterized in that,
further comprising the steps of:
f') analyzing the mechanical fault of the high-voltage circuit breaker;
the analysis of the mechanical fault of the high-voltage circuit breaker comprises the following steps:
f' 1) obtaining a test high-voltage circuit breaker, under the condition of a laboratory, arranging a light source, a plurality of high-speed cameras, an MCU, a power supply interface, a plurality of photoelectric displacement sensors and a wireless communication module in the test high-voltage circuit breaker, wherein the high-speed cameras are aligned to moving parts of the high-voltage circuit breaker and shoot images of the moving parts, the photoelectric displacement sensors detect displacement and vibration of the moving parts of the high-voltage circuit breaker, the power supply interface supplies power for the high-speed cameras, the photoelectric displacement sensors and the MCU, and the high-speed cameras, the wireless communication module and the photoelectric displacement sensors are all connected with the MCU;
f' 2) carrying out mechanical characteristic tests on the tested high-voltage circuit breaker for a plurality of times;
f' 3) selecting one maintenance requirement to enable the maintenance requirement not to reach the standard according to the maintenance requirement of the mechanical part of the high-voltage circuit breaker, continuously carrying out mechanical characteristic tests until the high-voltage circuit breaker is tested to have a fault, recording the motion track of each moving part, the speed on a track point and the vibration data of a stroke end point in the mechanical characteristic tests for s times before the fault occurs, and associating the motion track, the speed on the track point and the vibration data with the fault to be used as fault reference data;
f '4) after repairing the high-voltage circuit breaker, selecting the next maintenance requirement and repeating the step F' 3 until all maintenance requirements are traversed;
f' 5) obtaining the motion track of the moving part of the high-voltage circuit breaker to be detected, the speed on the track point and the vibration data of the stroke end point as detection data, comparing the detection data with fault reference data to obtain a fault corresponding to the fault reference data closest to the detection data, and taking the fault as a mechanical fault analysis result of the high-voltage circuit breaker to be detected.
7. The method for detecting the mechanical property of the high-voltage circuit breaker based on the image recognition is characterized in that,
further comprising the steps of:
g') early warning of mechanical faults of the high-voltage circuit breaker;
the high-voltage circuit breaker mechanical fault early warning comprises the following steps:
g' 1) obtaining a test high-voltage circuit breaker, under the condition of a laboratory, arranging a light source, a plurality of high-speed cameras, an MCU, a power supply interface, a plurality of photoelectric displacement sensors and a wireless communication module in the test high-voltage circuit breaker, wherein the high-speed cameras are aligned to moving parts of the high-voltage circuit breaker and shoot images of the moving parts, the photoelectric displacement sensors detect displacement and vibration of the moving parts of the high-voltage circuit breaker, the power supply interface supplies power for the high-speed cameras, the photoelectric displacement sensors and the MCU, and the high-speed cameras, the wireless communication module and the photoelectric displacement sensors are all connected with the MCU;
g' 2) carrying out mechanical characteristic tests on the tested high-voltage circuit breaker for a plurality of times;
g' 3) selecting one maintenance requirement to enable the maintenance requirement not to reach the standard according to the maintenance requirement of the mechanical part of the high-voltage circuit breaker, continuously carrying out a mechanical characteristic test until the high-voltage circuit breaker is tested to have a fault, recording the motion track of each moving part, the speed on a track point and the vibration data of a stroke end point in the mechanical characteristic test from r times to s times before the fault occurs, and associating the motion track, the speed on the track point and the vibration data of the stroke end point with the fault to serve as fault early warning data;
g '4) after repairing the high-voltage circuit breaker, selecting the next maintenance requirement and repeating the step G' 3 until all maintenance requirements are traversed;
G5) and obtaining the motion track of the moving part of the high-voltage circuit breaker to be detected, the speed on the track point and the vibration data of the stroke end point as detection data, comparing the detection data with the fault early warning data to obtain a fault corresponding to the fault early warning data closest to the detection data, and taking the fault as a mechanical fault early warning result of the high-voltage circuit breaker to be detected.
8. An image recognition-based mechanical characteristic detection device of a high-voltage circuit breaker, which is used for executing the image recognition-based mechanical characteristic detection method of the high-voltage circuit breaker according to any one of claims 5 to 7,
the photoelectric displacement sensor comprises a data processing unit, a memory, a communication unit, a power supply unit, a data acquisition unit, a light source, a plurality of high-speed cameras, an MCU (micro control unit), a data interface, a power supply interface, a plurality of photoelectric displacement sensors and a wireless communication module, wherein the light source, the plurality of high-speed cameras, the MCU, the data interface and the power supply interface are all installed on a high-voltage circuit breaker, the light source is installed in the high-voltage circuit breaker and provides illumination, the high-speed cameras shoot mechanical parts of the high-voltage circuit breaker, the high-speed cameras and the data interface are all connected with the MCU, the power supply interface supplies power for the light source, the high-speed cameras and the MCU, the power supply unit is connected with the power supply interface, the data acquisition unit comprises a data reading interface connected with the data interface.
9. The high-voltage circuit breaker mechanical characteristic detection device based on image recognition is characterized in that,
the photoelectric displacement sensor comprises a laser transmitter, a current-limiting resistor, a photoresistor, a power supply module, a reflection sticker, a voltage sensor and a wireless communication module, wherein the laser transmitter is fixedly arranged in a shell of the high-voltage circuit breaker and is aligned to an alignment point on the outer surface of a mechanical motion part along the normal direction, an included angle is formed between emergent light of the laser transmitter and the normal direction of the outer surface of the mechanical motion part through adjustment, in the stroke of the mechanical motion part, the alignment point of the laser transmitter moves along the outer surface of the mechanical motion part to form a moving range, the reflection sticker is attached to the mechanical motion part and covers the moving range of the alignment point, the reflection sticker is provided with a plurality of high reflection areas which are arranged at equal intervals along the stroke of the mechanical motion part, a low reflection area is arranged between adjacent high reflection areas, the width of the high reflection area is equal to that of the, the device comprises a photoresistor, a laser emitter, a voltage sensor, a wireless communication module and a data acquisition unit, wherein the photoresistor is arranged on the other side of the surface of the mechanical motion part, which is symmetrical with respect to the normal direction, of the laser emitter, one end of the photoresistor is grounded, the other end of the photoresistor is connected with a power supply module through a current-limiting resistor, the voltage sensor acquires the voltage of a connection point of the photoresistor and the current.
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