A rigid contact network abrasion and geometric parameter detection device and detection method

Abstract

The application discloses a kind of rigid contact network abrasion and geometric parameter detection device and detection method, including detection box, measurement unit, sliding unit, data processing unit and terminal display unit, the abrasion detection component includes first image acquisition equipment and first detection laser;The geometric parameter detection component includes second image acquisition equipment and second detection laser, and the second image acquisition equipment is slidably arranged in the detection box;The second image acquisition equipment is fixedly connected with position adjusting component, and the position adjusting component is fixed to the detection box and moves the second image acquisition equipment.This application has the beneficial effect that by driving the screw rod to rotate, the moving bracket and the guide rail block are driven to move linearly, the second image acquisition equipment moves to the inside or outside of the detection box for image acquisition.Using this technical solution can make the detection box structure more compact and the layout more reasonable.

Description

Technical Field

[0001] This invention relates to the field of rail transit inspection technology, and in particular to a device and method for detecting wear and geometric parameters of rigid contact wires. Background Technology

[0002] The overhead contact system is the main structure of railway electrification engineering. It is erected in a zigzag pattern above the rails, transmitting power to electric locomotives through pantographs on top of the locomotives. With the widespread application of rigid contact systems in urban rail construction, maintenance and upkeep of these systems have become particularly important. Developing lightweight, mobile carrier devices equipped with relevant testing technologies to perform close-range inspections of contact system geometry, contact wire wear, and the condition of contact system components has become an important method for inspecting Π-type overhead rigid contact systems.

[0003] In the existing technology, both the wear detection component and the geometric parameter detection component are fixed inside the detection box. However, since the data information collected by the wear detection component and the geometric parameter detection component are different, placing them both inside the detection box would result in a large volume of the detection box, increasing the pressure on the movable carrier device. Summary of the Invention

[0004] The purpose of this invention is to solve the above-mentioned problems by designing a device for detecting the wear and geometric parameters of rigid contact wires.

[0005] The device includes a detection housing, a measurement unit, a sliding unit, a data processing unit, and a terminal display unit. The sliding unit is fixedly mounted on the detection housing and moves along a busbar. The data processing unit is fixed inside the detection housing, and the terminal display unit is electrically connected to the data processing unit. The measurement unit includes a wear detection component and a geometric parameter detection component. The wear detection component includes a first image acquisition device and a first detection laser fixed to the detection housing. The geometric parameter detection component includes a second image acquisition device and a second detection laser. The second detection laser is fixed to the detection housing, and the second image acquisition device is slidably mounted on the detection housing. The second image acquisition device is fixedly connected to a position adjustment component, which is fixed to the detection housing and drives the second image acquisition device to move.

[0006] Furthermore, it also includes a positioning component, which includes a moving part and a fixed part. The moving part is fixedly connected to the position adjustment component, and the fixed part is fixed to the detection box. At least two sets of fixed parts are provided, and the two sets of fixed parts are provided on both sides of the moving part.

[0007] Furthermore, the position adjustment assembly includes a drive device, a lead screw, a guide rail, a slider, and a fixed base. The drive device is fixed to the detection box, and a lead screw is fixed to the output end of the drive device. A moving part is threadedly connected to the lead screw. A guide rail is fixed to the detection box, and a slider is slidably arranged on the guide rail. At least one slider is fixedly connected to a fixed base, and a second image acquisition device is fixedly connected to the fixed base.

[0008] Furthermore, the fixing part includes a fixing bracket and a first magnetic element. The detection box is fixed with the fixing bracket, the lead screw passes through the fixing bracket, and the first magnetic element is fixed to the side wall of the fixing bracket.

[0009] Furthermore, the movable part includes a movable bracket and a second magnetic component. The movable bracket is fixed to the fixed base, and the lead screw passes through the movable bracket. The second magnetic component is fixed on both sides of the movable bracket, and the second magnetic component has the opposite magnetism to the first magnetic component.

[0010] Furthermore, the second image acquisition device is fixed inside the camera housing, and the camera housing is fixedly connected to the mounting base.

[0011] Furthermore, the first focusing ends of the first image acquisition device and the second image acquisition device have a predetermined tilt angle in space with the flow receiving surface of the busbar.

[0012] Furthermore, it also includes a power management module and a control module, both of which are electrically connected to the first image acquisition device, the first detection laser, the second image acquisition device, the second detection laser, and the driving device.

[0013] A method for detecting the geometric parameters of a rigid contact wire includes the following steps:

[0014] Step 1: The detection box is suspended on the busbar and powered on: The power management module supplies power to the first image acquisition device, the first detection laser, the second image acquisition device, the second detection laser (51) and the drive device, and the control module performs IP matching connection with the first image acquisition device and the second image acquisition device;

[0015] Step 2: Configure the interface parameters of the handheld terminal display unit: Turn on the handheld terminal device. In the parameter setting interface, you can set the camera acquisition parameters, motor drive parameters, result display parameters, and data storage parameters.

[0016] Step 3: Measurement of contact wire geometric parameters:

[0017] S1: The sliding unit drives the detection box to move along the busbar, the second detection laser irradiates the surface of the object under test, and the second image acquisition device collects the laser line on the object under test to extract the height information, thereby generating a 3D image;

[0018] S2: The data processing unit processes and analyzes the feature point data of the 3D image information, and uses trigonometric functions to calculate the pull-out value and the guide height value.

[0019] Step 4: The handheld terminal device displays the test results, and abnormal points are marked in a list.

[0020] The trigonometric function formulas in step three are as follows:

[0021] The contact line geometric position detection is transformed into the geometric position detection of the camera and the track plane. (See attached image) Figure 8 In the diagram, A and B are the edge points of the two rails on the track plane, C and C1 are the positions of the contact wire, and D is the projection point of the conductor onto the rail surface. Refer to the following calculation formula:

[0022] Calculate the semi-perimeter of triangle ABC (or ABC1) according to formula (1).

[0023] p = 1 / 2(a + b + L) (1)

[0024] Where L is the track gauge; a is the length of the line connecting the conductor to rail A and the rail surface; b is the length of the line connecting the conductor to rail B and the rail surface; and p is the semi-perimeter of triangle ABC (or ABC1).

[0025] The area S of triangle ABC (or ABC1) is calculated using Heron's formula (2) and conventional formula (3) respectively, and the height y of the triangle is obtained, which is the height value between the second image acquisition device and the track plane. Given the relative height y' between the second image acquisition device and the contact line, the guide height value D of the contact line can be calculated using formula (4).

[0026] Where, S=√p*(pa)*(pb)*(pL)(2)

[0027] S=1 / 2(L×y)(3)

[0028] D=y+y'(4)

[0029] Where y is the height of the second image acquisition device relative to the track plane, S is the area of ​​triangle ABC (or ABC1), and D is the height of the contact wire.

[0030] Use the Pythagorean theorem (5) to calculate the length of any side of triangle ABC1.

[0031] (5)

[0032] x1 is the distance from the vertical point of the second image acquisition device to the A rail surface, and x2 is the distance from the vertical point of the second image acquisition device to the B rail surface. Given the distance L between points A and B, the deviation of the vertical point of the second image acquisition device from the center point of the AB surface is calculated using formula (6).

[0033] x = L / 2 - x1 (6)

[0034] x is the pull-out value of the contact wire relative to the rail plane.

[0035] The invention provides a device and method for detecting wear and geometric parameters of a rigid contact wire, achieving the following beneficial effects: When measuring geometric parameters, the drive screw rotates to drive the moving bracket and guide rail slider to perform reciprocating linear motion, allowing the second image acquisition device to move to the outside of the detection box for image acquisition. When idle, the drive screw rotates to drive the moving bracket and guide rail slider to perform reciprocating linear motion, moving the second image acquisition device to the inside of the detection box. This technical solution makes the detection box structure more compact and the layout more reasonable, while also improving the lifespan of the second image acquisition device.

[0036] During the movement of the second image acquisition device, its absolute position is determined by two fixed parts. Since the first and second magnetic components have opposite magnetic properties, when they attract each other, the relative position between the second image acquisition device and the detection box remains unchanged, making the contact rail information acquired by the second image acquisition device more accurate. Attached Figure Description

[0037] Figure 1 This is a perspective view of a device for detecting wear and geometric parameters of a rigid contact wire according to the present invention;

[0038] Figure 2 This is a schematic diagram of the internal structure of a rigid contact wire wear and geometric parameter detection device according to the present invention;

[0039] Figure 3 This is a schematic diagram of the position adjustment unit of the rigid contact wire wear and geometric parameter detection device according to the present invention;

[0040] Figure 4 This is a schematic diagram of the structure of the fixing part of the rigid contact wire wear and geometric parameter detection device according to the present invention;

[0041] Figure 5 This is a schematic diagram of the moving part of the rigid contact wire wear and geometric parameter detection device according to the present invention;

[0042] Figure 6This is a schematic diagram of the sliding module of a rigid contact wire wear and geometric parameter detection device according to the present invention;

[0043] Figure 7 This is a schematic diagram of the guiding module of the rigid contact wire wear and geometric parameter detection device according to the present invention;

[0044] Figure 8 This is a schematic diagram for calculating the geometric position in the geometric parameter detection method of the present invention;

[0045] In the diagram, 1. Detection box; 11. Support frame; 2. Measuring unit; 21. Position adjustment assembly; 211. Drive device; 212. Lead screw; 213. Guide rail; 214. Slider; 215. Fixing base; 22. Positioning assembly; 23. Second image acquisition device; 231. Camera cover; 24. Moving part; 241. Moving bracket; 242. Second magnetic component; 25. Fixing part; 251. Fixing bracket; 252. First magnetic component; 3. Sliding unit; 31. Sliding module 311. Block; 312. Pulley; 313. Rotating arm; 314. Safety pin; 315. Baffle; 32. Guide module; 321. Guide wheel; 322. Fixing frame; 323. Support column; 324. Compression elastic element; 325. Connecting seat; 33. Clamping claw; 4. Wear detection assembly; 41. First detection laser; 42. First image acquisition device; 5. Geometric parameter detection assembly; 51. Second detection laser; 6. Busbar; 7. Power management module; 8. Control module. Detailed Implementation

[0046] The present invention will now be described in detail with reference to the accompanying drawings, such as... Figure 1 and Figure 2As shown, a device and method for detecting wear and geometric parameters of rigid contact wires includes a detection housing 1, a measuring unit 2, a sliding unit 3, a data processing unit, and a terminal display unit. The sliding unit 3 is fixedly mounted on the detection housing 1 and moves along a busbar 6. The data processing unit is fixed inside the detection housing 1, and the terminal display unit is electrically connected to the data processing unit. The measuring unit 2 includes a wear detection component 4 and a geometric parameter detection component 5. The wear detection component 4 includes a first image acquisition device 42 and a first detection laser 41 fixed to the detection housing 1. The sliding unit 3 is fixed outside the detection housing 1, and it contacts the busbar 6, causing the detection housing 1 to move along the busbar 6. Simultaneously, the wear detection component 4 and the geometric parameter detection component 5 also move along the busbar 6, continuously collecting data and transmitting it to the data processing unit. The data processing unit analyzes the wear and geometric parameters and transmits the results to the terminal display unit, which can be a handheld mobile device. A first detection laser 41 and a first image acquisition device 42, installed on the top of the detection housing 1, are used to measure the wear value of the contact wire. A second detection laser 51 and a second image acquisition device 23, installed on the bottom of the detection housing 1, are used to measure the contact wire guide height and pull-out value. The first image acquisition device 42 and the second image acquisition device 23 can be selected as 3D cameras. The first focusing ends of the first image acquisition device 42 and the second image acquisition device 23 have a predetermined tilt angle in space with the flow receiving surface of the busbar 6. The first detection laser 41, installed on the top of the detection device housing, vertically irradiates the surface of the contact wire. The first image acquisition device 42 collects the laser lines on the surface of the contact wire, extracts the contact wire contour depth information, and extracts the contact wire depth information through the triangulation principle to establish a 3D contour map of the contact wire. The shooting frequency is determined by the number of pulses of the camera encoder and the movement speed of the main body of the detection device. By processing the continuous laser line information, the 3D contour data of the contact wire along the movement direction is obtained. A 3D contour data model of the standard contact wire is established. By comparing the data with the data of the data processing unit, the wear data such as the residual height and cross-sectional width of the measured contact wire relative to the standard wire are calculated.

[0047] The geometric parameter detection component 5 includes a second image acquisition device 23 and a second detection laser 51. The second detection laser 51 is fixed to the detection housing 1, and the second image acquisition device 23 is slidably disposed within the detection housing 1. The second image acquisition device 23 is a high-speed 3D camera, and the second detection laser 51 is a high-power laser source. The high-power laser source is fixed inside the housing, and the high-speed 3D camera is mounted on a mounting base 215 via a camera cover 231 and fixed at a certain angle to the laser source. During parameter measurement, the second image acquisition device 23 is pulled out to the outside of the housing for photographing; when idle, it can be moved inside the housing, thus reducing the overall size of the housing. Geometric parameter measurement is performed from top to bottom. The high-power laser source vertically illuminates the surface of the rail, and the 3D camera photographs the laser profile of the rail in real time, calculating the position information of the rail plane relative to the geometric measurement module. After processing by the data processing module, the guide height and pull-out value of the contact line relative to the rail plane are obtained.

[0048] like Figures 3-5 As shown, the second image acquisition device 23 is fixedly connected to a position adjustment component 21. The position adjustment component 21 is fixed to the detection housing 1 and drives the second image acquisition device 23 to move. The position adjustment component 21 includes a drive device 211, a lead screw 212, a guide rail 213, a slider 214, and a fixed base 215. The drive device 211 is fixed to the detection housing 1, and the output end of the drive device 211 is fixed to the lead screw 212. The lead screw 212 is threadedly connected to a moving part 24. The detection housing 1 is fixed to the guide rail 213, and the slider 214 is slidably arranged on the guide rail 213. At least one slider 214 is fixedly connected to a fixed base 215, and the fixed base 215 is fixedly connected to the second image acquisition device 23. The system also includes a positioning component 22, which comprises a movable part 24 and a fixed part 25. The movable part 24 is fixedly connected to the position adjustment component 21, and the fixed part 25 is fixed to the detection housing 1. At least two sets of fixed parts 25 are provided, with the two sets of fixed parts 25 located on both sides of the movable part 24. The fixed part 25 includes a fixed bracket 251 and a first magnetic element 252. The detection housing 1 is fixed with the fixed bracket 251, and a lead screw 212 passes through the fixed bracket 251. The first magnetic element 252 is fixed to the side wall of the fixed bracket 251. The movable part 24 includes a movable bracket 241 and a second magnetic element 242. The movable bracket 241 is fixed to the fixed base 215, and the lead screw 212 passes through the movable bracket 241. The second magnetic element 242 is fixed on both sides of the movable bracket 241, and the second magnetic element 242 has the opposite magnetic properties to the first magnetic element 252.

[0049] Specifically, the drive device 211 can be a motor. The drive device 211 drives the lead screw 212 to rotate. When the lead screw 212 rotates, the moving bracket 241 moves along the lead screw 212. Since the moving bracket is fixedly connected to the fixed base 215, the guide rail 213 and the slider 214 drive the fixed bracket 322 to move. The second image acquisition device 23 can switch between entering the detection box 1 or moving to the outside of the detection box 1. Fixed parts 25 are provided on both sides of the moving part 24. The two fixed parts 25 determine the two absolute positions of the moving part 24, thereby determining the two absolute positions of the second image acquisition device 23. These two absolute positions can also determine the working position and idle position of the second image acquisition device 23. The first magnetic element 252 and the second magnetic element 242 are two magnetic elements with opposite magnetic properties. When they are close to each other, they can attract each other, further ensuring the stability of the moving part 24.

[0050] The second detection laser emits a laser beam that vertically illuminates the two rails on the track plane. The second image acquisition device acquires the laser beam from the surfaces of the two rails at a certain angle. Based on the principle of laser triangulation, a contour map of the track plane is established.

[0051] The two detection modules inside the detection box are connected to the control module via a GigE interface. The first image acquisition device sends the 3D contour data of the contact wire to the data processing unit of the control module through the GigE interface protocol standard. The residual height of the contact wire is obtained by processing and analyzing the contour data. The second image acquisition device sends the track plane contour map to the control module for data processing and analysis. The height and pull-out value of the detection camera relative to the rail plane are calculated by using the mathematical relationship of trigonometric functions. The fixed distance between the camera and the contact wire is added to obtain the guide height and pull-out value of the contact wire relative to the rail plane.

[0052] The motor drive module and control module inside the housing of the detection device are connected via a serial interface. The control module controls the movement state of the sliding unit and simultaneously calibrates the position information of the contact wire wear and geometric parameters based on the encoder information inside the motor drive control, making it convenient for users to view and operate.

[0053] The testing chamber transmits contact wire wear profile data and geometric position data to a handheld terminal for display via wireless communication. The handheld terminal device on site can operate the main body of the testing device and perform testing and measurement through the wireless network.

[0054] In this application, the measurement of the geometric position of the overhead contact line is transformed into the measurement of the geometric position of the geometric position detection camera and the rail plane, thereby improving the accuracy of camera detection by increasing system stability and detection range.

[0055] The second image acquisition device 23 is fixed inside the camera cover 231, and the camera cover 231 is fixedly connected to the mounting base 215.

[0056] It also includes a power management module 7 and a control module 8, both of which are electrically connected to the first image acquisition device 42, the first detection laser 41, the second image acquisition device 23, the second detection laser 51, and the driving device 211. The power management module 7 mainly provides power.

[0057] like Figure 6 and Figure 7 As shown, the sliding unit 3 includes a support frame 11 and a moving part 24. At least two sets of the moving part 24 are provided. Each set of the moving part 24 includes two sliding modules 31 and two guide modules 32 symmetrically arranged on both sides of the busbar 6. The top of the support frame 11 is fixedly connected to the sliding module 31, and the side wall of the support frame 11 is fixed to the guide module 32. The sliding module 31 and the guide module 32 in one set of the moving part 24 are respectively arranged on the upper and lower sides of the busbar 6. The sliding module 31 and the guide module 32 are respectively arranged on the upper and lower sides of the busbar 6. They cooperate to suspend the detection device on the busbar 6 and allow it to move along the busbar 6. During the movement of the detection device driven by the sliding module 31, the measurement unit 2 of the detection device acquires images of the busbar 6 and constructs a 3D image. The main control module processes and analyzes the feature point data of the 3D image information, calculates the pull-out value and guide height value using trigonometric functions, and also obtains the wear value through data analysis.

[0058] like Figure 6As shown, the sliding module 31 includes a sliding wheel 311 and a rotating assembly. The sliding wheel 311 is fixedly connected to the rotating assembly. In a first state, the rotating assembly is fixed to the support frame 11, and in a second state, the rotating assembly can rotate along the support frame 11. The rotating assembly includes a rotating arm 312 and a safety pin 313. The rotating arm 312 is inserted into the end of the support frame 11 and can rotate along the support frame 11. The safety pin 313 passes through the support frame 11 and the rotating arm 312. At least one of the sliding wheels 311 in the sliding module 31 is fixedly connected to a driving device 211. In this embodiment, the two sliding wheels 311 at the front left and front right are fixedly connected to the driving device 211, serving as driving wheels to move the entire detection device along the busbar 6. The two sliding wheels 311 at the rear left and rear right serve as driven wheels, mainly cooperating with the two driving wheels to make the movement more stable. When the suspension device is in operation, the axis of the rotating arm 312 is parallel to that of the support frame 11, and the wheel body of the sliding wheel 311 is located on the protruding part of the manifold 6. When the detection device needs to be removed from the manifold 6, the rotating arm 312 is rotated along the support frame 11, and the axes of the two remain intersecting. The top of the support frame 11 has a notch, and the rotating arm 312 mates with this notch. A pivot is inserted between the support frame 11 and the rotating arm 312, and the rotating arm 312 rotates around this pivot along the support frame 11. At the same time, a safety pin 313 can be inserted above the pivot along the support frame 11 and the rotating arm 312. The safety pin 313 is used to fix the rotating arm 312 and the support frame 11 and adjust their positional relationship.

[0059] A baffle 314 is fixed to the side wall of the support frame 11. The baffle 314 has a bent structure that is inclined along the support frame 11. In a first state, the rotating arm 312 is coaxially arranged with the support frame 11. In a second state, the rotating arm 312 is in contact with the bent structure. The bent structure of the baffle 314 is used to adjust the rotation amplitude of the rotating arm 312. The position where the rotating arm 312 contacts the bent structure of the baffle 314 is the limit position of the rotation of the rotating arm 312.

[0060] like Figure 7As shown, the guiding module 32 includes a guide wheel 321, a fixed frame 322, a support column 323, a compression elastic element 324, and a connecting seat 325. The guide wheel 321 is rotatably connected to the fixed frame 322, and the fixed frame 322 is fixedly fitted with the support column 323. The support column 323 extends into the connecting seat 325 and can slide along the connecting seat 325. The compression elastic element 324 is fixed between the fixed frame 322 and the connecting seat 325. The connecting seat 325 is fixedly connected to the support frame 11. The guide wheel 321 is used to cooperate with the sliding wheel 311 to drive the detection device to move. The guide wheel 321 mainly serves to guide and support the busbar 6. The compression elastic element 324 can be selected as a spring. A downward force along the axis of the compression elastic element 324 is applied to the fixing frame 322, compressing the compression elastic element 324. The support column 323 moves inside the connecting seat 325, and the position of the fixing frame 322, which is fixedly connected to the support column 323, changes accordingly. The height between the guide wheel 321 and the busbar 6 changes, and the guide wheel 321 is released from contact with the busbar 6. When the force acting on the fixing frame 322 along the axis of the compression elastic element 324 is removed, the compression elastic element 324 rebounds, and the support column 323 drives the fixing frame 322 to move in a direction closer to the busbar 6. The guide wheel 321 enters the groove at the bottom of the busbar 6.

[0061] The sliding wheel 311 and the guide wheel 321 are arranged in pairs. The sliding wheel 311 moves along the protruding part of the edge of the busbar 6, and the guide wheel 321 moves along the groove part on the lower side of the protruding part of the edge of the busbar 6. In operation, the sliding wheel 311 and the guide wheel 321 move close to each other and act on the upper and lower sides of the busbar 6 respectively. The wheelset mechanism, consisting of the sliding wheels 311 and the guide wheels 321 on both sides, uses spring force to clamp the guide wheels 321 and safety pins 313 to position the sliding wheels 311, enabling continuous movement of the sliding wheels 311 and the guide wheels 321 on the track plane and preventing derailment.

[0062] The support frame 11 has a clamping claw 33 fixed at its end for fixing the wear and geometric parameter detection device. The clamping claw 33 has an L-shaped cross-section. The clamping claw 33 clamps a detection box 1 and is used to connect the detection box 1 and the suspension device, ensuring that the detection box 1 also moves along the busbar 6 when the sliding wheel 311 in the suspension device moves along the busbar 6. The measuring unit 2 in the detection box 1 acquires images of the wear parameters and geometric parameters, and the main control module processes the data.

[0063] When idle, pull out the safety pin 313, compress the elastic element 324 downward with external force, and at the same time push the rotating arm 312 outward with external force. Rotate the rotating arm 312 around the axis to the bent section position of the baffle 314. The sliding wheel 311 disengages from the slide rail, and the guide wheel 321 is completely disengaged from the slide rail of the busbar 6. During testing, under the action of external force, push the rotating arm 312 inward. The rotating arm 312 rotates around the axis to the vertical position. Insert the safety pin 313. The sliding wheel 311 presses against the upper surface of the slide rail of the busbar 6. At the same time, the elastic element 324 is compressed and the rebound force presses against the contact surface between the guide wheel 321 and the slide rail of the busbar 6. The guide wheel 321 presses against the lower surface of the busbar 6.

[0064] Geometric parameter measurement methods:

[0065] Step 1: The detection box 1 is suspended on the busbar 6 and powered on: the power management module 7 supplies power to the first image acquisition device 42, the first detection laser 41, the second image acquisition device 23, the second detection laser 51 and the drive device 211, and the control module 8 performs IP matching connection with the first image acquisition device 42 and the second image acquisition device 23.

[0066] Step 2: Configure the interface parameters of the handheld terminal display unit: Turn on the handheld terminal device. In the parameter setting interface, you can set the camera acquisition parameters, motor drive parameters, result display parameters, and data storage parameters.

[0067] Step 3: Measurement of contact wire geometric parameters:

[0068] S1: The sliding unit 3 drives the detection box 1 to move along the busbar 6, the second detection laser 51 irradiates the surface of the object to be tested, and the second image acquisition device 23 collects the laser line on the object to be tested to extract the height information, thereby generating a 3D image;

[0069] S2: The data processing unit processes and analyzes the feature point data of the 3D image information, and uses trigonometric functions to calculate the pull-out value and the guide height value.

[0070] Step 4: The handheld terminal device displays the test results, and abnormal points are marked in a list.

[0071] The trigonometric function formulas in step three are as follows:

[0072] The contact line geometric position detection is transformed into the geometric position detection of the camera and the track plane. (See attached image) Figure 8 In the diagram, A and B are the edge points of the two rails on the track plane, C and C1 are the positions of the contact wire, and D is the projection point of the conductor onto the rail surface. Refer to the following calculation formula:

[0073] Calculate the semi-perimeter of triangle ABC (or ABC1) according to formula (1).

[0074] p = 1 / 2(a + b + L) (1)

[0075] Where L is the track gauge; a is the length of the line connecting the conductor to rail A and the rail surface; b is the length of the line connecting the conductor to rail B and the rail surface; and p is the semi-perimeter of triangle ABC (or ABC1).

[0076] The area S of triangle ABC (or ABC1) is calculated using Heron's formula (2) and conventional formula (3) respectively, and the height y of the triangle is obtained, which is the height value between the second image acquisition device and the track plane. Given the relative height y' between the second image acquisition device and the contact line, the guide height value D of the contact line can be calculated using formula (4).

[0077] Where, S=√p*(pa)*(pb)*(pL)(2)

[0078] S=1 / 2(L×y)(3)

[0079] D=y+y'(4)

[0080] Where y is the height of the second image acquisition device relative to the track plane, S is the area of ​​triangle ABC (or ABC1), and D is the height of the contact wire.

[0081] Use the Pythagorean theorem (5) to calculate the length of any side of triangle ABC1.

[0082] (5)

[0083] x1 is the distance from the vertical point of the second image acquisition device to the A rail surface, and x2 is the distance from the vertical point of the second image acquisition device to the B rail surface. Given the distance L between points A and B, the deviation of the vertical point of the second image acquisition device from the center point of the AB surface is calculated using formula (6).

[0084] x = L / 2 - x1 (6)

[0085] x is the pull-out value of the contact wire relative to the rail plane.

[0086] The above technical solutions only embody the preferred technical solutions of the present invention. Any modifications that may be made by those skilled in the art to certain parts thereof embody the principles of the present invention and fall within the protection scope of the present invention.

Claims

1. A device for detecting wear and geometric parameters of a rigid catenary, characterized in that, The utility model relates to a kind of rail wear and tear detection device, including detection box (1), measuring unit (2), sliding unit (3), data processing unit and terminal display unit, the detection box (1) is fixedly provided with sliding unit (3), the sliding unit (3) moves along busbar (6), data processing unit is fixed in the detection box (1), and terminal display unit is electrically connected with data processing unit; The measuring unit (2) includes abrasion detection assembly (4) and geometric parameter detection assembly (5), and the abrasion detection assembly (4) includes a first image acquisition device (42) and a first detection laser (41) fixed to the detection box (1); The geometric parameter detection assembly (5) includes a second image acquisition device (23) and a second detection laser (51), and the second detection laser (51) is fixed to the detection box (1), and the second image acquisition device (23) is slidingly arranged in the detection box (1); The second image acquisition device (23) is fixedly connected with a position adjusting assembly (21), and the position adjusting assembly (21) is fixed to the detection box (1) and drives the second image acquisition device (23) to move.

2. A device for detecting wear and geometric parameters of a rigid catenary according to claim 1, characterized in that, It also includes a positioning assembly (22), which includes a moving part (24) and a fixed part (25), the moving part (24) is fixedly connected with the position adjusting assembly (21), and the fixed part (25) is fixed to the detection box (1). The fixed part (25) is provided with at least two groups, and the two groups of fixed parts (25) are arranged on both sides of the moving part (24).

3. A device and method for detecting wear and geometric parameters of a rigid catenary according to claim 2, characterized in that, The position adjusting assembly (21) includes a driving device (211), a lead screw (212), a guide rail (213), a sliding block (214) and a fixed seat (215), the driving device (211) is fixed to the detection box (1), the driving device (211) is fixed with a lead screw (212) at the output end, the lead screw (212) is threadedly connected with the moving part (24), the detection box (1) is fixed with a guide rail (213), the guide rail (213) is slidingly provided with a sliding block (214), and at least one sliding block (214) is fixedly connected with a fixed seat (215). The fixed seat (215) is fixedly connected with the second image acquisition device (23).

4. A device for detecting wear and geometric parameters of a rigid catenary according to claim 3, characterized in that, The fixed part (25) includes a fixed support (251) and a first magnetic member (252), and the detection box (1) is fixed with a fixed support (251), and the lead screw (212) passes through the fixed support (251). The sidewall of the fixed support (251) is fixed with a first magnetic member (252).

5. A device for detecting wear and geometric parameters of a rigid catenary according to claim 4, characterized in that, The moving part (24) includes a moving support (241) and a second magnetic member (242), the moving support (241) is fixed to the fixed seat (215), the lead screw (212) passes through the moving support (241), and the moving support (241) is fixed with a second magnetic member (242) on both sides. The second magnetic member (242) is magnetically opposite to the first magnetic member (252).

6. A device for detecting wear and geometric parameters of a rigid catenary according to claim 3, characterized in that, The second image acquisition device (23) is fixed in a camera cover (231), and the camera cover (231) is fixedly connected with the fixing seat (215).

7. A device for detecting wear and geometric parameters of a rigid catenary according to claim 1, characterized in that, The first focusing end of the first image acquisition device (42) and the second image acquisition device (23) and the current collecting surface of the busbar (6) have a predetermined inclination angle in space.

8. A device for detecting wear and geometric parameters of a rigid catenary according to claim 3, characterized in that, A power management module (7) and a control module (8) are further included, and the power management module (7) and the control module (8) are electrically connected with the first image acquisition device (42), the first detection laser (41), the second image acquisition device (23) and the second detection laser (51), and the driving device (211).

9. A method for detecting the geometry of a rigid catenary, characterized in that, The rigid contact network wear and geometric parameter detection device of any one of claims 1-8 comprises the following steps: Step one: the detection box (1) is hung on the busbar (6) and powered on: the power management module (7) supplies power to the first image acquisition device (42), the first detection laser (41), the second image acquisition device (23) and the second detection laser (51), and the driving device (211), and the control module (8) is connected with the first image acquisition device (42) and the second image acquisition device (23) for IP matching; Step two: the interface configuration parameters of the handheld terminal display unit: open the handheld terminal device, and the camera acquisition parameters, motor driving parameters, result display parameters and data storage parameters can be set on the parameter setting interface; Step three: contact network geometric parameter measurement: S1: the sliding unit (3) drives the detection box (1) to move along the busbar (6), the second detection laser (51) irradiates the surface of the measured object, the second image acquisition device (23) acquires the height information of the laser line on the measured object, and then generates a 3D image; S2: the data processing unit processes and analyzes the feature point data of the 3D image information, and calculates the pull-out value and the lead value by using the trigonometric function; Step four: the handheld terminal device displays the detection results, and the abnormal points are marked in the form of a list.

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