Pole-mounted circuit breaker detection system

Abstract

The invention discloses a pole-mounted circuit breaker detection system, and relates to the technical field of sealing detection. The precision problem is solved. The system specifically comprises a data acquisition module which is electrically connected to an air pressure sensor and a laser range finder and is used for acquiring pressure detection data of the air pressure sensor and displacement detection data of the laser range finder; the central processing module is used for processing the data of the data acquisition module and generating a leakage result; and a control module. According to the invention, the abnormal values of the air pressure data acquired by the air pressure sensor and the laser range finder are removed, and the final leakage rate is calculated by adopting a weight-based calculation mode, so that on one hand, low data precision caused by faults of a single or local air pressure sensor and laser range finder can be prevented; on the other hand, the importance of the influence of the air pressure sensor and the laser range finder on the final result can be improved by setting the weight, and the detection precision is improved.

Description

Technical Field

[0001] The invention relates to the technical field of sealing detection, and in particular to a pole-mounted circuit breaker detection system. Background Art

[0002] A pole-mounted circuit breaker refers to a circuit breaker installed and operated on an electric pole. The theoretical research level and manufacturing technology of various circuit breakers have made great progress, especially the vacuum pole-mounted circuit breaker, whose contacts of the conductive rod are located in the vacuum cavity, which can effectively solve the arc problem when opening and closing the switch.

[0003] Since there is no gas in the vacuum chamber of the vacuum circuit breaker, it cannot be ionized to achieve the arc extinguishing function. This means that the arc extinguishing ability of the vacuum circuit breaker is closely related to the vacuum degree of the vacuum chamber. Therefore, it is necessary to conduct a sealing test on the vacuum chamber of the vacuum column circuit breaker to detect its arc extinguishing ability.

[0004] In the prior art, the sealing test is mostly carried out by placing it in a closed space, then applying positive / negative pressure to the closed space and maintaining the pressure. During the maintenance process, the pressure change in the closed space is detected by a pressure sensor, thereby realizing the sealing test of the vacuum chamber. However, since the pressure sensor itself has errors, there will be certain errors when measuring the pressure. Therefore, for smaller leakage amounts, the error increases relative to the total proportion of the leakage amount, resulting in reduced accuracy. At the same time, when the sensor acquires data, there will be large data acquisition errors due to the sensor's own faults, resulting in an increase in the overall detection error.

[0005] To this end, the present invention proposes a pole-mounted circuit breaker detection system. Summary of the invention

[0006] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a pole-mounted circuit breaker detection system.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions: A device for use in a pole mounted circuit breaker detection system includes a base; A sealing frame is provided on the top of the base, and an electric door is provided on the outer wall of the base located on the opening side of the sealing frame, and the base, the sealing frame and the electric door form a closed space; The top of the sealing frame is provided with an air pump for providing air pressure to the enclosed space and a plurality of air pressure sensors for detecting the air pressure in the enclosed space; A displacement type pressure detection assembly is arranged on the back of the sealing frame, and the displacement type pressure detection assembly comprises a box body fixed to the top of the base and located in the closed space, and a plurality of connecting pipes fixed and connected to the box body, wherein the inner cavity of the box body is filled with liquid, and the inner cavity of the box body is connected to the closed space through the connecting hole; The top of the connecting pipe is open, the inner wall of the connecting pipe is slidably connected with an outer conical plug, and a laser rangefinder for detecting the position of the outer conical plug is arranged on the top of the connecting pipe. The laser rangefinder is fixed to the side wall of the sealing frame through a fixing plate.

[0008] Preferably, an inner conical ring matching with the outer conical plug is fixed to the inner wall of the bottom of the connecting pipe.

[0009] Furthermore: a slide rail is fixed to the top outer wall of the base, and the outer wall of the slide rail is connected to a support seat for supporting the circuit breaker through an electric slider.

[0010] On the basis of the above scheme: the sealing frame is composed of multiple glass plates, the glass plates are fixedly connected to the base and to each other, and the fixed connections are coated with sealant, the periphery of the glass plates is fixed with a steel frame, and the ends of the steel frame are fixed to the top outer wall of the base.

[0011] A better solution among the above solutions is that the end face of the electric door is fixed to a sealing sheet bonded to the glass plate.

[0012] As a further solution of the present invention: a convex plate is fixed to the end of the electric door through a plurality of connecting rods, and a rubber sheet is fixed to the opposite side of the convex plate and the electric door.

[0013] A pole mounted circuit breaker detection system, comprising: A data acquisition module, the data acquisition module is electrically connected to the air pressure sensor and the laser rangefinder, and is used to collect pressure detection data of the air pressure sensor and displacement detection data of the laser rangefinder; A central processing module processes the data from the data acquisition module and generates a leakage result; A control module, the control module is electrically connected to the air pump, the electric slider, and the electric door, and is used to control the operation of the air pump, the electric slider, and the electric door; The human-computer interaction module is used for the user to interact with the system, and includes a display unit and a control unit.

[0014] As a preferred embodiment of the present invention: the processing logic of the central processing module includes the following steps: S1: The central processing module receives the data from the air pressure sensor and the laser rangefinder, and calculates the functional relationship between the displacement change ΔL of the laser rangefinder and the air pressure change ΔP in the enclosed space based on the density of the liquid stored in the box. , where ρ is the liquid density and g is the gravitational acceleration; S2: extracting the leakage of multiple air pressure sensors within the pressure holding time t; S3: extracting a plurality of leakage amounts calculated by the laser rangefinder at the pressure holding time t; S4: Using the discrete degree algorithm, execute the discrete degree algorithm once to eliminate the abnormal data in steps S2 and S3; S5: Keep the unremoved data and calculate the average leakage value obtained by the air pressure sensor under "no-load" and "load" detection respectively. and and the mean leakage value calculated by the laser rangefinder and , and the only variable under the "no-load" and "load" detections is whether a pole-mounted circuit breaker is placed; S6: Then according to the formula Calculate the vacuum chamber leakage rate of the circuit breaker, where , is the weight coefficient.

[0015] Meanwhile, in step S4, the method for removing abnormal data includes the following steps: S41: Extract data packet data, which are ,in represents the i-th data in the data packet, n represents the total number of n data in the data packet, and n is the number of air pressure sensors or laser rangefinders; S42: Discreteness calculation; S421: For the i-th data , first calculate the mean of all data except ; S422: If - The absolute value of is less than or equal to the error threshold , then the data is determined to be accurate and does not need to be eliminated; S423: If - The absolute value of If the error of the corresponding air pressure sensor or displacement pressure detection component is too large and a fault occurs, the data will be discarded.

[0016] As a better solution of the present invention: in the step S42, when the data of the air pressure sensor and the laser rangefinder are respectively eliminated, the error threshold is set to , , , where b1 is the upper limit of the error detected by the pressure sensor, a1 is the lower limit of the error detected by the pressure sensor, b2 is the upper limit of the error detected by the laser rangefinder, and a2 is the lower limit of the error detected by the laser rangefinder; In the step S6, , .

[0017] The beneficial effects of the present invention are: 1. The present invention firstly sets up a plurality of air pressure sensors and a plurality of displacement pressure detection components, and adopts a comprehensive algorithm to perform pressure measurement, thereby increasing the amount of measured data and the measurement means, so that the upper and lower errors of each measurement data can offset each other to a certain extent, thereby increasing the pressure detection accuracy. In addition, before the detection, a "no-load" detection is first performed, thereby eliminating the influence of the device's own errors on the accuracy, thereby further increasing the detection accuracy.

[0018] 2. The present invention, by providing components such as a rubber sheet, a connecting rod, and a convex plate, utilizes the positive pressure to expand the rubber sheet outward so as to fit the glass plate and the base. On the one hand, the contact pressure can be utilized to achieve secondary sealing, thereby reducing the sealing load of the sealing sheet. At the same time, the secondary sealing pressure can be adaptively adjusted according to the size of the positive pressure. On the other hand, the contact and compression with the glass plate and the base will also generate friction, thereby utilizing the friction to offset a portion of the air pressure on the electric door, thereby preventing the extrusion force of the sealing sheet from being offset.

[0019] 3. The present invention eliminates abnormal values ​​from the air pressure data obtained by the air pressure sensor and the laser rangefinder respectively, and then uses a weight-based calculation method to calculate the final leakage rate. On the one hand, it can prevent low data accuracy caused by failure of a single or local air pressure sensor or laser rangefinder. On the other hand, it can also make the importance of the air pressure sensor and laser rangefinder on the final result by setting the weight, thereby further increasing the detection accuracy.

[0020] 4. The present invention uses the difference between the mean and the value to eliminate abnormal values, and then compares them based on the error threshold, and the error threshold is related to the measurement accuracy of the air pressure sensor and the laser rangefinder. Therefore, on the one hand, it can ensure the reliable elimination of abnormal data according to the deviation size of the data, and on the other hand, it can also prevent normal data from being mistakenly eliminated.

[0021] 5. The present invention sets the weight according to the error, thereby ensuring that the pressure sensor and the laser rangefinder are used together to increase the accuracy. In addition, the error of the pressure sensor and the laser rangefinder can be used to determine the degree of influence on the result, thereby further reducing the final error and increasing the detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1A schematic diagram of the overall structure of a device used in a pole-mounted circuit breaker detection system proposed by the present invention; Figure 2 A schematic diagram of the structure of a displacement pressure detection component of a device used in a pole-mounted circuit breaker detection system proposed by the present invention; Figure 3 For the present invention Figure 2 The enlarged structural diagram of part A in the middle; Figure 4 A schematic diagram of a sealed frame structure of a device used in a pole-mounted circuit breaker detection system proposed by the present invention; Figure 5 A schematic diagram of a rubber sheet separation structure of a device used in a pole-mounted circuit breaker detection system proposed by the present invention; Figure 6 A processing logic flow chart of a central processing module of a pole-mounted circuit breaker detection system proposed by the present invention; Figure 7 The present invention provides a data elimination logic flow chart of a pole-mounted circuit breaker detection system.

[0023] In the figure: 1. base; 2. sealing frame; 3. displacement pressure detection component; 4. air pump; 5. air pressure sensor; 6. slide rail; 7. electric slider; 8. support seat; 9. electric door; 10. box body; 11. connecting hole; 12. connecting pipe; 13. laser rangefinder; 14. fixing plate; 15. inner conical ring; 16. outer conical plug; 17. glass plate; 18. steel frame; 19. rubber sheet; 20. connecting rod; 21. convex plate; 22. sealing sheet. DETAILED DESCRIPTION

[0024] The technical solution of the present invention is further described in detail below in conjunction with specific implementation methods.

[0025] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0026] Embodiment 1: A device used in a pole-mounted circuit breaker detection system, such as Figure 1-Figure 5 As shown, it includes a base 1, a sealing frame 2 is arranged on the top of the base 1, an electric door 9 is arranged on the outer wall of the base 1 located on the opening side of the sealing frame 2, and the base 1, the sealing frame 2 and the electric door 9 form a closed space.

[0027] An air pump 4 for providing air pressure to the enclosed space and a plurality of air pressure sensors 5 for detecting the air pressure in the enclosed space are arranged on the top of the sealing frame 2 .

[0028] A displacement pressure detection assembly 3 is provided on the back of the sealing frame 2. The displacement pressure detection assembly 3 includes a box body 10 fixed to the top of the base 1 and located in a closed space, and a plurality of connecting tubes 12 fixed and connected to the box body 10. Liquid is placed in the inner cavity of the box body 10, and the inner cavity of the box body 10 is connected to the closed space through a connecting hole 11.

[0029] The top of the connecting tube 12 is open, and an outer conical plug 16 is slidably connected to the inner wall of the connecting tube 12. A laser rangefinder 13 for detecting the position of the outer conical plug 16 is provided on the top of the connecting tube 12. The laser rangefinder 13 is fixed to the side wall of the sealing frame 2 through a fixing plate 14.

[0030] When the device is in use, the electric door 9 is first directly closed, and then gas is blown into the closed space through the air pump 4 to increase the air pressure in the closed space, and then the pressure is maintained. The pressure change can be directly detected by the air pressure sensor 5, and at the same time, the air pressure in the closed space will be transmitted to the inside of the box body 10, so that the liquid in the box body 10 is squeezed into the connecting pipe 12, so that the outer conical plug 16 moves up, and the laser rangefinder 13 can detect the moving distance of the outer conical plug 16, so as to calculate the pressure, and then the pressure is detected by multiple air pressure sensors 5 and multiple displacement pressure detection components 3 for comprehensive calculation, and the final change rate of the pressure is judged to obtain the leakage rate of the detection device itself, and then the electric door 9 is opened, and the circuit breaker is placed in the closed space, and the measurement is performed again to obtain the comprehensive leakage rate of the circuit breaker and the device itself, and then the leakage rate of the device itself is subtracted to obtain the leakage rate of the circuit breaker.

[0031] This device firstly sets up multiple air pressure sensors 5 and multiple displacement pressure detection components 3, and adopts a comprehensive algorithm to measure pressure, thereby increasing the amount of measured data and the measurement means, so that the upper and lower errors of each measurement data can offset each other to a certain extent, thereby increasing the pressure detection accuracy. In addition, before the detection, a "no-load" test is performed first, thereby eliminating the influence of the device's own errors on the accuracy, further increasing the detection accuracy.

[0032] To solve the reflux problem; Figure 3 As shown, an inner conical ring 15 that cooperates with an outer conical plug 16 is fixed to the inner wall of the bottom of the connecting pipe 12 .

[0033] A slide rail 6 is fixed to the top outer wall of the base 1 , and the outer wall of the slide rail 6 is connected to a support seat 8 for supporting the circuit breaker through an electric slider 7 .

[0034] By providing the inner conical ring 15 , the maximum moving position of the outer conical plug 16 can be limited, thereby preventing the outer conical plug 16 from moving to the corner of the connecting pipe 12 and causing a gap to affect subsequent use.

[0035] In order to facilitate observation; Figure 4 As shown, the sealing frame 2 is composed of multiple glass plates 17, and the glass plates 17 are fixedly connected to the base 1 and to each other, and the fixed connections are coated with sealant. A steel frame 18 is fixed to the periphery of the glass plate 17, and the end of the steel frame 18 is fixed to the top outer wall of the base 1.

[0036] The entire detection process can be observed through the glass plate 17.

[0037] In order to solve the sealing problem; Figure 5 As shown, the end surface of the electric door 9 is fixed to a sealing sheet 22 that is attached to the glass plate 17 .

[0038] A convex plate 21 is fixed to the end of the electric door 9 via a plurality of connecting rods 20 , and a rubber sheet 19 is fixed to the opposite side of the convex plate 21 and the electric door 9 .

[0039] When the electric door 9 is in a closed state, the sealing sheet 22 contacts the end face of the glass plate 17 to achieve sealing, and the rubber sheet 19 and the convex plate 21 will extend into the closed space. When the closed space is filled with gas, the air pressure will also act on the rubber sheet 19. The rubber sheet 19 will expand in all directions due to the air pressure, so that the rubber sheet 19 contacts and squeezes the inner wall of the glass plate 17 and the inner wall of the base 1. The greater the air pressure, the greater the force with which the rubber sheet 19 contacts and squeezes the inner wall of the glass plate 17 and the inner wall of the base 1.

[0040] Since the entire enclosed space is in a positive pressure state during the test, the electric door 9 is subjected to a positive pressure force, which will offset a portion of the squeezing force of the sealing sheet 22, thereby reducing the sealing effect and posing a risk of leakage. The device, by providing components such as a rubber sheet 19, a connecting rod 20, and a convex plate 21, utilizes the positive pressure to expand the rubber sheet 19 outward so as to fit the glass plate 17 and the base 1. On the one hand, it can utilize the contact pressure to achieve secondary sealing and reduce the sealing load of the sealing sheet 22. At the same time, it can also adaptively adjust the secondary sealing pressure according to the size of the positive pressure. On the other hand, the contact and squeezing between the glass plate 17 and the base 1 will also generate friction, thereby utilizing the friction to offset a portion of the air pressure on the electric door 9, thereby preventing the squeezing force of the sealing sheet 22 from being offset.

[0041] When the present embodiment is in use, the electric door 9 is first directly closed, and then gas is blown into the closed space through the air pump 4 to increase the air pressure in the closed space, and then the pressure is maintained. The pressure change can be directly detected by the air pressure sensor 5, and at the same time, the air pressure in the closed space will be transmitted to the inside of the box body 10, so that the liquid in the box body 10 is squeezed into the connecting pipe 12, so that the outer conical plug 16 moves up, and the laser rangefinder 13 can detect the moving distance of the outer conical plug 16, so as to calculate the pressure, and then the pressure is detected by multiple air pressure sensors 5 and multiple displacement pressure detection components 3 for comprehensive calculation, and the final rate of change of pressure is judged, so as to obtain the leakage rate of the detection device itself, and then the electric door 9 is opened, and the air pressure in the closed space is transmitted to the inside of the box body 10, so that the liquid in the box body 10 is squeezed into the connecting pipe 12, so that the outer conical plug 16 moves up, and the laser rangefinder 13 can detect the moving distance of the outer conical plug 16, so as to calculate the pressure. The circuit breaker is placed in a closed space and measured again to obtain the comprehensive leakage rate of the circuit breaker and the device itself, and then the leakage rate of the circuit breaker is subtracted from the leakage rate of the device itself to obtain the leakage rate of the circuit breaker. In addition, when the electric door 9 is in a closed state, the sealing sheet 22 contacts the end face of the glass plate 17 to achieve sealing, and the rubber sheet 19 and the convex plate 21 will extend into the closed space. When the closed space is filled with gas, the air pressure will also act on the rubber sheet 19, and the rubber sheet 19 will expand to the surroundings due to the air pressure, so that the rubber sheet 19 contacts and squeezes the inner wall of the glass plate 17 and the inner wall of the base 1, and the greater the air pressure, the greater the contact and squeezing force of the rubber sheet 19 with the inner wall of the glass plate 17 and the inner wall of the base 1.

[0042] Embodiment 2: A pole-mounted circuit breaker detection system, which is used to process the data collected by the pole-mounted circuit breaker detection device in Embodiment 1 and generate a judgment result, such as Figure 6-Figure 7 As shown: It includes: A data acquisition module, which is electrically connected to the air pressure sensor 5 and the laser rangefinder 13 and is used to collect pressure detection data of the air pressure sensor 5 and displacement detection data of the laser rangefinder 13; A central processing module processes the data from the data acquisition module and generates a leakage result; A control module, the control module is electrically connected to the air pump 4, the electric slide 7, and the electric door 9, and is used to control the operation of the air pump 4, the electric slide 7, and the electric door 9; The human-computer interaction module is used for the user to interact with the system, and includes a display unit and a control unit.

[0043] The processing logic of the central processing module includes the following steps: S1: The central processing module receives the data from the air pressure sensor 5 and the laser rangefinder 13, and calculates the functional relationship between the displacement change ΔL of the laser rangefinder 13 and the air pressure change ΔP in the enclosed space in combination with the density of the liquid stored in the box 10. , where ρ is the liquid density and g is the gravitational acceleration; S2: extracting the leakage amount of multiple air pressure sensors 5 within the pressure holding time t; S3: extracting a plurality of leakage amounts calculated by the laser rangefinder 13 during the pressure holding time t; S4: Using the discrete degree algorithm, execute the discrete degree algorithm once to eliminate the abnormal data in steps S2 and S3; S5: retain the unremoved data and calculate the average leakage value obtained by the air pressure sensor 5 under the "no-load" and "load" detections respectively. and and the mean value of the leakage calculated by the laser rangefinder 13 and , and the only variable under the "no-load" and "load" detections is whether a pole-mounted circuit breaker is placed; S6: Then according to the formula Calculate the vacuum chamber leakage rate of the circuit breaker, where , is the weight coefficient.

[0044] In step S4, the method for removing abnormal data includes the following steps: S41: Extract data packet data, which are ,in represents the i-th data in the data packet, n represents a total of n data in the data packet, and n is the number of air pressure sensors 5 or the number of laser rangefinders 13; S42: Discreteness calculation; S421: For the i-th data , first calculate the mean of all data except ; S422: If - The absolute value of is less than or equal to the error threshold , then the data is determined to be accurate and does not need to be eliminated; S423: If - The absolute value of , it is determined that the error of the corresponding air pressure sensor 5 or the displacement pressure detection component 3 is too large and a fault occurs, and the data is discarded.

[0045] In the step S42, when the data of the air pressure sensor 5 and the laser rangefinder 13 are respectively eliminated, the error thresholds are set to be , , , where b1 is the upper limit of the error detected by the air pressure sensor 5, a1 is the lower limit of the error detected by the air pressure sensor 5, b2 is the upper limit of the error detected by the laser rangefinder 13, and a2 is the lower limit of the error detected by the laser rangefinder 13; In the step S6, , .

[0046] For example, the air pressure error detected by the air pressure sensor 5 is expressed as , x is the detection value, The actual value range is (x+0.05, x-0.03), then b1=0.05, a1=-0.03, then =0.04; the pressure error detected by the laser rangefinder 13 is expressed as , is the detection value, The actual value range is , then b2=0.05, a2=-0.01, then =0.03.

[0047] The present invention removes abnormal values ​​from the air pressure data obtained by the air pressure sensor 5 and the laser rangefinder 13 respectively, and then uses a weight-based calculation method to calculate the final leakage rate. On the one hand, it can prevent low data accuracy caused by failure of a single or local air pressure sensor 5 or laser rangefinder 13. On the other hand, it can also make the importance of the air pressure sensor 5 and laser rangefinder 13 on the final result by setting the weight, thereby further increasing the detection accuracy.

[0048] In addition, the present invention uses the difference between the mean and the value to eliminate abnormal values, and then compares them based on the error threshold, and the error threshold is related to the measurement accuracy of the air pressure sensor 5 and the laser rangefinder 13. Therefore, on the one hand, it can ensure the reliable elimination of abnormal data according to the deviation size of the data, and on the other hand, it can also prevent normal data from being mistakenly eliminated.

[0049] At the same time, the present invention sets the size of the weight according to the size of the error, so as to ensure that the pressure sensor 5 and the laser rangefinder 13 are used together to increase the accuracy. At the same time, the error size of the pressure sensor 5 and the laser rangefinder 13 can be used to determine the degree of influence on the result, thereby further reducing the final error and increasing the detection accuracy.

[0050] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A pole-mounted circuit breaker detection system, which is implemented by a detection device, wherein the detection device comprises a base (1), an air pump (4), a displacement pressure detection component (3), an air pressure sensor (5), an electric door (9) and a laser rangefinder (13); in, The displacement type pressure detection assembly (3) comprises a box body (10) fixed to the top of the base (1) and located in a closed space, and a plurality of connecting pipes (12) fixed and connected to the box body (10); A slide rail (6) is fixed to the top outer wall of the base (1), and the outer wall of the slide rail (6) is connected to a support seat (8) for supporting the circuit breaker via an electric slider (7); Characterized in that the pole-mounted circuit breaker detection system comprises: A data acquisition module, the data acquisition module is electrically connected to the air pressure sensor (5) and the laser rangefinder (13), and is used to collect pressure detection data of the air pressure sensor (5) and displacement detection data of the laser rangefinder (13); A central processing module processes the data from the data acquisition module and generates a leakage result; a control module, the control module being electrically connected to the air pump (4), the electric slide block (7), and the electric door (9), and being used to control the operation of the air pump (4), the electric slide block (7), and the electric door (9); A human-computer interaction module is used for the user to interact with the system, and includes a display unit and a control unit; The processing logic of the central processing module includes the following steps: S1: The central processing module receives data from the air pressure sensor (5) and the laser rangefinder (13), and calculates the functional relationship between the displacement change ΔL of the laser rangefinder (13) and the air pressure change ΔP in the enclosed space in combination with the density of the liquid stored in the box body (10); S2: extracting the leakage amount of multiple air pressure sensors (5) within the pressure holding time t; S3: extracting a plurality of leakage amounts calculated by the laser rangefinder (13) during the pressure holding time t; S4: Using the discrete degree algorithm, execute the discrete degree algorithm once to eliminate the abnormal data in steps S2 and S3; S5: Keep the unremoved data and calculate the average leakage value obtained by the air pressure sensor (5) under "no load" and "load" detection respectively and and the mean leakage value calculated by the laser rangefinder (13) and , and the only variable under "no load" and "load" detection is whether the pole-mounted circuit breaker is placed; S6: Then calculate the vacuum chamber leakage rate of the circuit breaker.

2. A pole mounted circuit breaker detection system according to claim 1, characterized in that: In step S1, the functional relationship between the displacement change ΔL of the laser rangefinder (13) and the pressure change ΔP in the enclosed space is calculated as follows: , where ρ is the liquid density and g is the gravitational acceleration.

3. A pole mounted circuit breaker detection system according to claim 1, characterized in that: In the step S6, the calculation formula is: ,in , is the weight coefficient.

4. A pole mounted circuit breaker detection system according to claim 1, characterized in that: In step S4, the method for removing abnormal data includes the following steps: S41: Extract data packet data, which are ,in represents the i-th data in the data packet, n represents a total of n data in the data packet, and n is the number of air pressure sensors (5) or the number of laser rangefinders (13); S42: Discreteness calculation; S421: For the i-th data , first calculate the mean of all data except ; S422: If - The absolute value of is less than or equal to the error threshold , then the data is determined to be accurate and does not need to be eliminated; S423: If - The absolute value of , it is determined that the error of the corresponding air pressure sensor (5) or displacement pressure detection component (3) is too large and a fault has occurred, and the data is discarded.

5. A pole mounted circuit breaker detection system according to claim 4, characterized in that: In the step S42, when the data of the air pressure sensor (5) and the laser rangefinder (13) are respectively eliminated, the error thresholds are set to be , , , wherein b1 is the upper limit of the error detected by the air pressure sensor (5), a1 is the lower limit of the error detected by the air pressure sensor (5), b2 is the upper limit of the error detected by the laser rangefinder (13), and a2 is the lower limit of the error detected by the laser rangefinder (13).

6. A pole mounted circuit breaker detection system according to claim 3, characterized in that: In the step S6, , .

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