A subway train electronic component fault maintenance device and method thereof

Abstract

The application discloses a kind of subway train electronic component fault maintenance equipment;Device includes box and servo motor, the box is used to place subway vehicle electronic board piece with electronic component;The center of the inner bottom wall of the servo motor is connected with box;The box and servo motor are provided with clamping assembly, the clamping assembly includes disc, L-shaped rod, limiting rod and arc slot, the disc is connected with the driving end of servo motor;The present application first clamps and fixes subway vehicle electronic board piece to ensure accuracy in subsequent maintenance operation process, then carry out dust removal to avoid dust affecting detection accuracy, and dust removal operation has been carried out on subway train electronic component maintenance and repair, finally through electric fusion welding pen fuse welding point or re-welding to remove or replace the faulty electronic component, to repair subway vehicle electronic board piece, and repeat step S4 until detection is normal, maintenance operation ends, while it can simplify and optimize maintenance operation.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of subway train electronic component fault maintenance, in particular to a subway train electronic component fault maintenance device and method. BACKGROUND

[0002] The electronic board of subway vehicle is composed of many electronic components, and the welding points and metal wires are dense. The failure of electronic components has been a problem for train operation. Because of the failure of electronic components, train delays, passenger evacuation and rescue events have occurred many times, which has a negative impact on the quality of operation service. Therefore, how to ensure the reliability of electronic components and ensure the reliability of train operation has become the focus of attention.

[0003] The existing patent (application number: CN209425301U) proposes an electronic maintenance component fixing plate, which includes a frame, a rotating disc mechanism, an adjusting mechanism and a fixing clamping mechanism. By rotating two adjusting caps, the relative positions of the four fixing clamping mechanisms are adjusted to adapt to electronic components of different sizes, facilitating maintenance. After the electronic components are fixed and clamped, the rocker is rotated, and the electronic components can rotate with the rotating disc, which is convenient for checking the electronic components from various positions and is conducive to the maintenance work.

[0004] The above-mentioned object maintenance table for electronic component maintenance can adapt to electronic components of different sizes by rotating two adjusting caps to adjust the relative positions of the four fixing clamping mechanisms. However, it cannot remove dust from the clamped electronic components, so it is difficult to avoid the problem of dust affecting detection accuracy. At the same time, it cannot detect and maintain electronic component failure, cannot calculate the probability of electronic component failure, and cannot determine whether the electronic component has been damaged according to the probability size and select to directly reinforce the welding point of the electronic component to avoid failure caused by poor contact or directly replace the electronic component. It cannot reduce unnecessary operations, reduce the efficiency of fault maintenance, and simplify and optimize the maintenance operation.

[0005] Therefore, the present application is proposed. SUMMARY

[0006] The technical problem to be solved by the present application is to overcome the shortcomings of the prior art and provide a subway train electronic component fault maintenance device and method to achieve the desired purpose. The electronic board of subway vehicle is clamped and fixed to ensure accuracy during subsequent maintenance operation, dust is removed to avoid the influence of dust on detection accuracy, and the dust removal operation is used for maintenance and repair of subway train electronic components. Finally, the faulty electronic components are removed or replaced by electric melting welding pen melting welding points or re-welding, thereby maintaining the electronic board of subway vehicle, and repeating step S4 until detection is normal, the maintenance operation is completed, and the maintenance operation is simplified and optimized.

[0007] To solve the above technical problems, the subway train electronic component fault maintenance equipment provided by the present application comprises a box body and a servo motor, the box body is used for placing a subway vehicle electronic board part with electronic components; the servo motor is connected with the center of the inner bottom wall of the box body; the box body and the servo motor are provided with a clamping assembly, the clamping assembly comprises a disc, an L-shaped rod, a limiting rod and an arc-shaped groove, the disc is connected with the driving end of the servo motor; the L-shaped rod is inserted into the box body; the limiting rod is connected with one end of the L-shaped rod; the arc-shaped groove is formed in the top of the disc and is matched with the limiting rod.

[0008] Further, the other end of the L-shaped rod is provided with a silica gel pad, and the top of the box body is provided with an anti-skid pad.

[0009] Further, the top of the anti-skid pad is provided with a plurality of supporting rods, the top end of the supporting rod is provided with a box body, the front side and the top of the box body are respectively provided with an oscilloscope and a pipe body, the lower side of the box body is provided with an electric melting welding pen and two detection probes electrically connected with the oscilloscope, the inner wall of the pipe body is provided with a fixing rod, the outer wall of the fixing rod is provided with a driving motor, and the driving end of the driving motor is provided with a fan blade.

[0010] Further, the inner wall of the pipe body is provided with a dustproof filter screen, and the dustproof filter screen is located above the driving motor.

[0011] Further, the outer wall of the pipe body is inserted with a single-sided rack, the outer wall of the single-sided rack is slidably connected with a double-sided rack, the rear side wall of the box body is provided with a micro motor, the rear side wall of the box body is rotatably connected with a rotating shaft, the driving end of the micro motor and the outer wall of the rotating shaft are both provided with a transmission wheel, a transmission belt is transmissionally connected between the two transmission wheels, the front side of the two transmission wheels is both provided with a sector gear matched with the double-sided rack, the inner wall of the pipe body is rotatably connected with a plurality of adjusting gears at equal intervals and meshingly connected with the single-sided rack, and a flow guide plate is installed on the adjusting gear.

[0012] Further, the electric melting welding pen and the transmission wheel are both provided with a elastic stretchable rope between the electric melting welding pen and the transmission wheel and the box body.

[0013] Further, the fault maintenance method comprises the following steps:

[0014] S1, placing the subway vehicle electronic board part with electronic components on the anti-skid pad, then starting the servo motor, the disc rotates with the driving end of the servo motor, and four limiting rods are driven to move through the four arc-shaped grooves, and then the subway vehicle electronic board part with electronic components is clamped through the L-shaped rod;

[0015] S2, start the driving motor to drive the fan blade to form a dust removal air flow to the subway vehicle electronic board with electronic components;

[0016] S3, start the micro motor to drive one of the transmission wheels to rotate and use the transmission belt to drive the other transmission wheel to rotate, so that the two fan gears rotate synchronously, and one rotation of the two fan gears respectively drives the double-sided rack to reciprocate on the single-sided rack, and in the process, the plurality of adjusting gears reciprocate forward and backward, so that the air flow formed in S is guided by the plurality of guide plates, and the dust removal range is increased;

[0017] S4, start the oscilloscope and detect the fault of the electronic component on the subway vehicle electronic board after dust removal through the two detection probes;

[0018] S5, remove or replace the faulty electronic component by the electric welding pen, and then repair the subway vehicle electronic board, and repeat step S4 until the detection is normal, and the repair work is completed;

[0019] S6, derive the failure of the electronic component on the subway vehicle electronic board by the double-parameter Weibull distribution cumulative distribution function to verify whether the electronic component may be damaged, that is, the probability of failure of the electronic component, and according to the probability size, determine whether the electronic component is damaged and select to directly reinforce the welding point of the electronic component to avoid the failure caused by poor contact or directly replace the electronic component, and the expression formula is:

[0020] x is a random variable, k is a shape parameter, and λ is a scaling factor. Take t as a random variable representing F, and the function represents the cumulative probability of the random time of failure in the life cycle of a system (because it depends on time). The expression formula is:

[0021] Since F(t) is defined as the availability function of the system, the corresponding system reliability function is R(t) = 1-F(t).

[0022] Further, failure and reliability are two completely random variables, so they can be defined inversely, and the expression formula is:

[0023] And the correctness of S6 can be verified by the formula.

[0024] After adopting the above technical scheme, the present application has the following beneficial effects compared with the prior art.

[0025] 1. In this invention, the electronic board of a subway vehicle with electronic components is placed on an anti-slip mat. Then, the servo motor is started, and the disc rotates with the drive end of the servo motor, driving the four limit rods to move through the four arc grooves. Then, the electronic board of the subway vehicle with electronic components is clamped by the L-shaped rod, ensuring the stability of the fault detection process of the electronic board of the subway vehicle. Therefore, the accuracy of the subsequent maintenance operation can be ensured, thus improving the maintenance effect and efficiency.

[0026] 2. In this invention, the drive motor is started, which drives the fan blades to form a dust-removing airflow that blows towards the electronic components of the subway vehicle, preventing dust from affecting the accuracy of the detection. The micro motor is started, which drives one of the transmission wheels to rotate and uses a transmission belt to rotate the other transmission wheel, thereby causing the two sector gears to rotate synchronously. The synchronous rotation of the two sector gears causes the double-sided rack to move back and forth on the single-sided rack, and during the process, multiple adjusting gears rotate back and forth. This guides the airflow formed in S through multiple guide plates and increases the dust removal range, thereby improving the dust removal effect and further preventing dust from affecting the accuracy of the detection. By setting up a dust filter, the air passing through the pipe is filtered and dust is removed, thereby improving the dust removal effect on the electronic components of the subway vehicle. Therefore, this dust removal operation has been used for the maintenance and repair of the electronic components of the subway train.

[0027] 3. In this invention, faulty electronic components are removed or replaced by melting or re-soldering the solder joints with an electrofusion welding pen, thereby repairing the electronic boards of the subway vehicle. Step S is repeated until the test is normal, and the repair work is completed. At the same time, the failure of electronic components on the electronic boards of the subway vehicle is deduced by the cumulative distribution function of the two-parameter Weiber distribution to verify whether the electronic components may be damaged, that is, the probability of the electronic components failing. Based on the probability, it is determined whether the electronic components are damaged, and the choice is to directly reinforce the solder joints of the electronic components to avoid failures caused by poor contact or directly replace the electronic components. This reduces unnecessary operations, which can greatly improve the efficiency of fault repair and simplify and optimize the repair operation. Attached Figure Description

[0028] The accompanying drawings, as part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments and descriptions of the invention are used to explain the invention, but do not constitute an undue limitation of the invention. Obviously, the drawings described below are merely some embodiments, and those skilled in the art can obtain other drawings based on these drawings without creative effort. In the drawings:

[0029] Fig. 1 A schematic diagram of the overall structure of a fault repair device for electronic components in a subway train.

[0030] Fig. 2It is a kind of subway train electronic component fault maintenance equipment in the internal structure diagram of box body;

[0031] Fig. 3 It is a kind of subway train electronic component fault maintenance equipment in the internal structure diagram of box body;

[0032] Fig. 4 It is a kind of subway train electronic component fault maintenance method in the fault probability diagram.

[0033] In the figure, 1 is box body, 2 is servo motor, 3 is clamping assembly, 301 is disc, 302 is L-shaped rod, 303 is limiting rod, 304 is arc-shaped slot, 4 is silica gel pad, 5 is antiskid pad, 6 is support rod, 7 is box body, 8 is oscilloscope, 9 is tube body, 10 is single-sided rack, 11 is double-sided rack, 12 is micro motor, 13 is rotating shaft, 14 is transmission wheel, 15 is transmission belt, 16 is sector gear, 17 is fixed rod, 18 is driving motor, 19 is fan blade, 20 is adjusting gear, 21 is guide plate, 22 is dust filter screen, 23 is electric welding pen, 24 is detection probe, 25 is elastic telescopic rope.

[0034] It should be noted that these drawings and written descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments will be described clearly and completely below in conjunction with the drawings of the embodiments of the present application. The following embodiments are used to illustrate the present application, but not to limit the scope of the present application.

[0036] In the description of the present application, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and are not intended to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0037] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0038] Depend on Figs. 1 to 4 The present invention provides a fault repair device for electronic components of subway trains, comprising a housing 1 and a servo motor 2. The housing 1 is used to place electronic circuit boards of subway vehicles containing electronic components. The servo motor 2 is connected to the center of the inner bottom wall of the housing 1. The housing 1 and the servo motor 2 are provided with a clamping assembly 3, which includes a disc 301, an L-shaped rod 302, a limiting rod 303, and an arc-shaped groove 304. The disc 301 is connected to the drive end of the servo motor 2. The L-shaped rod 302 is inserted into the housing 1. The limiting rod 303 is connected to one end of the L-shaped rod 302. The arc-shaped groove 304 is formed on the top of the disc 301 and is adapted to the limiting rod 303.

[0039] Furthermore, a silicone pad 4 is installed at the other end of the L-shaped rod 302, and an anti-slip pad 5 is installed on the top of the housing 1. By setting the silicone pad 4, hard contact between the L-shaped rod 302 and the electronic components of the subway vehicle is avoided, thus preventing damage to the electronic components of the subway vehicle during clamping. At the same time, the elasticity of the silicone pad 4 makes the clamping effect better. By setting the anti-slip pad 5, hard contact between the top of the housing 1 and the electronic components of the subway vehicle is avoided, thus preventing damage to the solder joints.

[0040] Furthermore, multiple support rods 6 are installed on the top of the anti-slip mat 5, and a box 7 is installed on the top of the support rods 6. An oscilloscope 8 and a tube 9 are installed on the front and top of the box 7, respectively. An electrofusion soldering pen 23 and two detection probes 24 electrically connected to the oscilloscope 8 are arranged below the box 7. A fixing rod 17 is installed on the inner wall of the tube 9, and a drive motor 18 is installed on the outer wall of the fixing rod 17. A fan blade 19 is installed on the drive end of the drive motor 18.

[0041] Furthermore, a dust filter 22 is installed on the inner wall of the tube body 9. The dust filter 22 is located above the drive motor 18. By setting the dust filter 22, the air passing through the tube body 9 is filtered and dust is removed, thereby improving the dust removal effect on the electronic components of the subway car. This facilitates subsequent fault detection and maintenance. Because the composition of dust is relatively complex, it sometimes provides acid radicals and metal ions that lead to degradation. The dust particles are small and have a strong adsorption capacity, which can adsorb harmful substances in the air onto their surfaces, making them acidic or alkaline. The electronic components of the subway car are composed of many components with dense solder joints and metal wires. Dust adsorbed on electronic components will reduce the heat dissipation capacity of the electronic components. On the other hand, because the dust contains moisture, the electronic components will become damp or even corrode. Dust adsorbed on the surface of the electronic components of the subway car will reduce the insulation resistance between adjacent printed lines, affecting the normal operation of the circuit. In severe cases, it can cause short circuit faults or even burnout. Therefore, this dust removal operation is essential for the maintenance and repair of the electronic components of the subway train.

[0042] Further, the outer wall of the pipe body 9 is inserted with a single-sided rack 10, the outer wall of the single-sided rack 10 is slidingly connected with a double-sided rack 11, the rear side wall of the box body 7 is provided with a micro motor 12, the rear side wall of the box body 7 is rotatably connected with a rotating shaft 13, the driving end of the micro motor 12 and the outer wall of the rotating shaft 13 are both provided with a transmission wheel 14, the transmission belt 15 is transmissionally connected between the two transmission wheels 14, the front side of the two transmission wheels 14 are both provided with a sector gear 16 matched with the double-sided rack 11, the inner wall of the pipe body 9 is rotatably connected with a plurality of adjusting gears 20 at equal intervals and meshingly connected with the single-sided rack 10, and the adjusting gears 20 are provided with a flow guide plate 21.

[0043] Further, the elastic retractable ropes 25 are arranged between the electric welding pen 23 and the transmission wheel 14 and the box body 7, so that the electric welding pen 23 and the transmission wheel 14 are conveniently hung, and use is more convenient.

[0044] Further, the fault maintenance method comprises the following steps:

[0045] S1, the subway vehicle electronic board parts with electronic components are placed on the non-slip mat 5, and then the servo motor 2 is started, the disc 301 rotates following the driving end of the servo motor 2, and moves the four limiting rods 303 through the four arc-shaped grooves 304, and then the L-shaped rods 302 clamp the subway vehicle electronic board parts with electronic components, ensuring the stability during the fault detection of the subway vehicle electronic board parts, so as to ensure the accuracy during the subsequent maintenance operation process, and thus improving the maintenance effect and efficiency;

[0046] S2, the driving motor 18 is started to drive the fan blades 19 to form a dust removal airflow blowing to the subway vehicle electronic board parts with electronic components, avoiding the influence of dust on detection accuracy;

[0047] S3, the micro motor 12 is started to drive one of the transmission wheels 14 to rotate and use the transmission belt 15 to drive the other transmission wheel 14 to rotate, so that the two sector gears 16 rotate synchronously, and one rotation of the two sector gears 16 respectively makes the double-sided rack 11 reciprocate left and right on the single-sided rack 10, and in the process, the plurality of adjusting gears 20 reciprocate and reverse rotate, so that the airflow formed in S2 is guided by the plurality of flow guide plates 21, and the dust removal range is increased, thereby improving the dust removal effect and further avoiding the influence of dust on detection accuracy;

[0048] S4, the oscilloscope 8 is started, and the electronic components on the subway vehicle electronic board parts after dust removal are detected by the two detection probes 24;

[0049] S5, the electronic components of the subway vehicle electronic board are repaired by removing or replacing the faulty electronic components through the electric melting welding pen 23 to melt the welding points or re-welding, and then step S4 is repeated until the detection is normal, and the maintenance work is completed;

[0050] S6, whether the electronic component has been damaged is verified by deriving the failure of the electronic component on the subway vehicle electronic board through the double-parameter Weibull distribution cumulative distribution function, that is, the probability of failure of the electronic component, whether the electronic component has been damaged is determined according to the probability size, and the electronic component is directly reinforced or directly replaced to avoid the failure caused by poor contact, unnecessary operation is reduced, the failure maintenance efficiency is greatly improved, the maintenance operation is simplified and optimized, and the expression formula is:

[0051] x is a random variable, k is a shape parameter, λ is a scaling factor, t is taken as a random variable representing F, and the function represents the cumulative probability of the random time of failure in the life cycle of a system (because it depends on time), and the expression formula is:

[0052] Since F(t) is defined as the availability function of the system, the function corresponding to the system reliability is R(t)=1-F(t).

[0053] Further, failure and reliability are two completely random variables, so they can be defined inversely, and the expression formula is:

[0054] And the correctness of S6 can be verified by the formula.

[0055] The above only describes the preferred embodiments of the present application, and does not limit the present application in any form, although the present application has been disclosed as above, however, it is not intended to limit the present application, any person skilled in the art can make some changes or modifications to the above-mentioned technical content as equivalent embodiments without departing from the technical solution of the present application, the implementation schemes in the above-mentioned embodiments can be further combined or replaced, as long as it does not deviate from the technical solution of the present application, any simple modification, equivalent change and modification of the above-mentioned embodiments according to the technical essence of the present application, all still belong to the scope of the present application.

Claims

1. A subway train electronic component fault maintenance equipment, comprising a box (1) for placing subway vehicle electronic board parts with electronic components and a servo motor (2) connected with the center of the inner bottom wall of the box (1); characterized in that The box (1) and the servo motor (2) are provided with a clamping assembly (3), the clamping assembly (3) comprises: A disc (301) connected with the driving end of the servo motor (2); An L-shaped rod (302) inserted with the box (1); A limiting rod (303) connected with one end of the L-shaped rod (302); An arc-shaped groove (304) opened in the top of the disc (301) and matched with the limiting rod (303); The other end of the L-shaped rod (302) is provided with a silica gel pad (4), and the top of the box (1) is provided with an anti-skid pad (5); The top of the anti-skid pad (5) is provided with a plurality of supporting rods (6), the top end of the supporting rod (6) is provided with a box body (7), the front side and the top of the box body (7) are respectively provided with an oscilloscope (8) and a pipe body (9), the lower side of the box body (7) is provided with an electric melting welding pen (23) and two detection probes (24) electrically connected with the oscilloscope (8), the inner wall of the pipe body (9) is provided with a fixing rod (17), the outer wall of the fixing rod (17) is provided with a driving motor (18), the driving end of the driving motor (18) is provided with a fan blade (19); The inner wall of the pipe body (9) is provided with a dustproof filter screen (22), and the dustproof filter screen (22) is located above the driving motor (18); The outer wall of the pipe body (9) is inserted with a single-sided rack (10), the outer wall of the single-sided rack (10) is slidably connected with a double-sided rack (11), the rear side wall of the box body (7) is provided with a micro motor (12), the rear side wall of the box body (7) is rotatably connected with a rotating shaft (13), the driving end of the micro motor (12) and the outer wall of the rotating shaft (13) are both provided with a transmission wheel (14), the transmission belt (15) is transmissionally connected between the two transmission wheels (14), the front side of the two transmission wheels (14) is both provided with a sector gear (16) matched with the double-sided rack (11), the inner wall of the pipe body (9) is rotatably connected with a plurality of adjusting gears (20) equidistantly and meshingly connected with the single-sided rack (10), and the adjusting gears (20) are provided with guide plates (21); The electric melting welding pen (23) and the transmission wheel (14) are both provided with elastic stretchable ropes (25) between the box body (7).

2. A method of using the subway train electronic component failure repair apparatus according to claim 1, characterized by, The steps comprise: S1, placing the subway vehicle electronic board parts with electronic components on the anti-skid pad (5), then starting the servo motor (2), the disc (301) rotates with the driving end of the servo motor (2) to drive the four limiting rods (303) to move through the four arc-shaped grooves (304) respectively, and then clamping the subway vehicle electronic board parts with electronic components through the L-shaped rod (302). S2, start the drive motor (18) and drive fan (19) to form a dust blowing air flow to the subway vehicle electronic board components with electronic components; S3, start the micro motor (12) and drive one of the transmission wheel (14) rotation and use the transmission belt (15) to make another transmission wheel (14) rotation, so that the two fan gears (16) rotate synchronously, two fan gears (16) rotate a circle respectively make double-sided rack (11) reciprocating on the single-sided rack (10) and in the process make a plurality of adjusting gear (20) reciprocating forward and reverse rotation, so that the air flow formed in S2 is guided by a plurality of guide plates (21), and the dust removal range is increased; S4, start the oscilloscope (8) and detect the electronic components on the subway vehicle electronic board components after dust removal through two detection probes (24); S5, remove or replace the faulty electronic components by electric welding pen (23), and then repair the subway vehicle electronic board components, and repeat step S4 until the detection is normal, and the repair work is completed; S6, the failure of the electronic components on the subway vehicle electronic board components is verified by the double parameter weibull distribution cumulative distribution function, that is, the probability of failure of the electronic components, whether the electronic components have been damaged is determined according to the probability, and the electronic components are directly welded or replaced, expression formula is: , is a random variable, is a shape parameter, is a scaling factor, and as a random variable representing F, the function characterizes the cumulative probability of the random time to failure in the life of a system, expressed as: Since F( ) is defined as the availability function of the system, the function of the system reliability is: .

3. The method of claim 2, wherein, Failure and reliability are two completely random variables, so the definition is opposite, expression formula is: And the correctness of S6 can be verified by this equation.

Images