Brake inspection bench roller out-of-roundness dynamic detection method and device

Abstract

The invention belongs to the field of computers, and particularly relates to a brake inspection bench roller out-of-roundness dynamic detection method and device, and the method comprises the steps: obtaining a center distance H which is a vertical distance from a laser ranging mechanism to a roller rotating shaft; a plurality of surface distances # imgabs0 # are obtained, the surface distances are vertical distances from a plurality of scanning points on the surface of the roller in the axial direction to the horizontal plane where the laser ranging mechanism is located, and the rotating shaft of the roller is parallel to the horizontal plane; calculating a scanning radius # imgabs2 # of the roller at each scanning point based on the center distance H and the plurality of surface distances # imgabs1 #; and determining the out-of-roundness of the roller according to the scanning radius # imgabs3 # at each scanning point. According to the method, the detection efficiency can be improved.

Description

Technical Field

[0001] This application relates to the technical field of out-of-roundness detection, and particularly to a method and device for dynamically detecting the out-of-roundness of the rollers of a braking test bench. Background Art

[0002] The detection principle of a reaction-type braking test bench is to park a vehicle on the rollers, control the rotational speed of the rollers through a motor to simulate the speed of the vehicle during driving, and the tester controls the vehicle braking system to apply braking force. The rotation of the rollers will be affected by resistance, thus simulating the actual braking process of the vehicle. The rotation of the rollers will be affected by the friction between the wheels and the rollers, and the working effect of the brake is manifested through this process. Due to factors such as long-term braking friction and uneven load, different degrees of wear and deformation will occur at various parts of the rollers, resulting in differences in the roller radius, that is, the out-of-roundness of the rollers. Excessive out-of-roundness of the rollers will affect the detection results and thus threaten driving safety.

[0003] Common detection of roller out-of-roundness is carried out through mechanical detection, with low detection efficiency and requiring manual operation. Summary of the Invention

[0004] Embodiments of this application provide a method and device for dynamically detecting the out-of-roundness of the rollers of a braking test bench to at least solve some of the above technical problems existing in the prior art.

[0005] In a first aspect, embodiments of this application provide a method for dynamically detecting the out-of-roundness of the rollers of a braking test bench, including: Obtaining the central distance H, where the central distance is the vertical distance from the laser ranging mechanism to the roller shaft; Obtaining a plurality of surface distances , where the surface distance is the vertical distance from a plurality of scanning points along the axial direction on the roller surface to the horizontal plane where the laser ranging mechanism is located, and the roller shaft is parallel to the horizontal plane; Based on the central distance H and the plurality of surface distances , calculating the scanning radius of the roller at each scanning point; Determining the out-of-roundness of the roller according to the scanning radius at each scanning point.

[0006] In an alternative embodiment, the central distance H is calculated from the distance L from the laser ranging mechanism to the scanning point of the roller shaft and the angle α between the laser beam and the horizontal plane, .

[0007] In an alternative embodiment, the th surface distance is from the distance from the laser ranging mechanism to the th scanning point on the roller surface and The included angle between the laser beam and the horizontal plane It is calculated that .

[0008] In an alternative embodiment, the scanning radius at each scanning point is obtained from the difference between the center distance and the surface distances, , is the scanning radius of the th scanning point, the th surface distance at the th scanning point.

[0009] In an alternative embodiment, according to the scanning radius at each scanning point to determine the out-of-roundness of the drum, including: If the scanning radius at each scanning point is within the set range, the out-of-roundness of the drum meets the specification; otherwise, the out-of-roundness of the drum does not meet the specification.

[0010] In an alternative embodiment, according to the scanning radius at each scanning point to determine the out-of-roundness of the drum, including: Obtain the maximum radius and the minimum radius among the scanning radii of each scanning point. If the maximum radius is greater than the maximum limit value of the set range , or the minimum radius is less than the minimum limit value of the set range , then the out-of-roundness of the drum does not meet the specification; otherwise, the out-of-roundness of the drum meets the specification.

[0011] In a second aspect, an embodiment of the present application provides a dynamic detection device for the out-of-roundness of a brake test bench drum, including: A bracket; A laser ranging mechanism disposed on the bracket, the laser ranging mechanism is used to obtain the center distance H and a plurality of surface distances , the center distance is the vertical distance from the laser ranging mechanism to the drum shaft, the surface distance is the vertical distance from a plurality of scanning points along the axial direction on the drum surface to the horizontal plane where the laser ranging mechanism is located, and the drum shaft is parallel to the horizontal plane; A processing unit, configured to calculate the scanning radius of the drum at each scanning point based on the center distance H and the plurality of surface distances , and determine the out-of-roundness of the drum according to the scanning radius at each scanning point .

[0012] In an alternative embodiment, the bracket includes: A pair of guide rails, arranged in parallel; A pair of support components are respectively arranged on the guide rail, and the support components can move along the guide rail; A cross beam, with both ends respectively connected to a pair of support components, and the laser ranging mechanism is arranged on the cross beam.

[0013] In an alternative embodiment, the support component includes: A base, which is slidably connected to the guide rail; A reciprocating telescopic mechanism is arranged on the base, the cross beam is connected to the reciprocating telescopic mechanism, and the reciprocating telescopic mechanism drives the cross beam to lift; The reciprocating telescopic mechanism is connected to the processing unit, and the processing unit controls the reciprocating telescopic mechanism to extend or contract.

[0014] In an alternative embodiment, it further includes: A universal support is arranged on the cross beam, the laser ranging mechanism is arranged on the universal support, the universal support is connected to the processing unit, and the processing unit controls the universal support to drive the laser ranging mechanism to rotate so as to adjust the scanning direction.

[0015] In a third aspect, an embodiment of the present application provides a computer-readable storage medium, on which a computer program is stored, and when the program is executed by a processor, the method described in any one of the above is implemented.

[0016] In a fourth aspect, an embodiment of the present application provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, and when the processor executes the computer program, the method described in any one of the above is implemented. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present application, and for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 A flowchart showing the dynamic detection method for the out-of-roundness of the brake test bench drum in an embodiment of the present application; Figure 2 A schematic diagram showing the principle of the dynamic detection method for the out-of-roundness of the brake test bench drum in an embodiment of the present application; Figure 3 A schematic diagram showing the structure of the dynamic detection device for the out-of-roundness of the brake test bench drum in an embodiment of the present application; Figure 4Schematic diagram showing the structure of an electronic device provided by an embodiment of the present application.

[0019] 1 - Bracket, 11 - Guide rail, 12 - Support assembly, 121 - Base, 122 - Reciprocating telescopic mechanism, 123 - Connecting seat, 13 - Cross beam, 2 - Positioning bolt, 3 - Universal support, 4 - Laser ranging mechanism, 5 - Drum, 51 - Rotating shaft. Detailed implementation manners

[0020] In order to enable those skilled in the art to better understand the solutions of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present application.

[0021] The terms "first", "second", etc. in the specification and claims of the present application and the above drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "include" and "have" and any variations thereof are intended to cover non - exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally further includes steps or units not listed, or optionally further includes other steps or units inherent to these processes, methods, products or devices.

[0022] Referring to

[0023] See Figure 1 and Figure 2 , an embodiment of the present application provides a method for dynamically detecting the out - of - roundness of the drum 5 of a braking inspection bench, including: Obtain the center distance H, where the center distance is the vertical distance from the laser ranging mechanism 4 to the rotating shaft 51 of the drum 5; Obtain a plurality of surface distances , where the surface distance is the vertical distance from a plurality of scanning points along the axial direction on the surface of the drum 5 to the horizontal plane where the laser ranging mechanism 4 is located, and the rotating shaft 51 of the drum 5 is parallel to the horizontal plane; Based on the center distance H and the plurality of surface distances , calculate the scanning radius of the drum 5 at each scanning point; According to the scanning radius at each scanning point the out-of-roundness of the roller 5 is determined.

[0024] In the embodiment of the present application, the upper edge surface of the roller 5 is scanned by the laser ranging mechanism 4. Using the Pythagorean theorem, the vertical distance from the roller 5 to the laser ranging mechanism 4 can be calculated, and then the scanning radius can be calculated. By obtaining the radii at different positions, the out-of-roundness of the roller 5 can be determined. The calculation amount is small, the efficiency is high, the cost is low, and it fills the technical gap in detecting the out-of-roundness of the roller 5 by the laser measurement method.

[0025] The method of the embodiment of the present application can efficiently and accurately evaluate the out-of-roundness of the roller 5. It has direct economic benefits and is very meaningful for the self-check of the out-of-roundness of the roller 5 of the vehicle inspection device.

[0026] In the embodiment of the present application, the center distance and the surface distance can be measured by the laser ranging mechanism 4. The laser ranging mechanism 4 can specifically be a lidar, or other appropriate laser ranging devices. The laser ranging mechanism 4 can be a single-beam laser ranging mechanism 4 or a multi-beam laser ranging mechanism 4. In a specific implementation, the laser ranging mechanism 4 can adopt a multi-beam lidar. For example, an 8-beam, 16-beam, 32-beam, 64-beam, 128-beam lidar.

[0027] When adopting a multi-beam lidar, the multiple beams emitted by the lidar can be fan-shaped, and the center distance H and multiple surface distances along the axial direction of the roller can be measured simultaneously .

[0028] When adopting a single-beam lidar, the center distance H and multiple surface distances can be measured by horizontally moving the lidar along the axial direction of the roller . Or the center distance H and multiple surface distances can be measured by rotating the lidar in a plane passing through the axis of the roller .

[0029] In some embodiments, the method of the embodiment of the present application can be to obtain multiple groups of center distances H and surface distances along the circumferential direction of the roller . Each group of center distances H can be measured separately or the same data can be adopted. The multiple surface distances of each group are measured separately along the axial direction of the roller. For example, for each measurement of a group of center distance H and surface distance , the roller is rotated by a certain angle, and then the next group of center distance H and surface distance is measured . Of course, it is also possible to only measure the surface distance of the next group , and the center distance H adopts the data measured in the first group. Measure the center distance H and surface distance of adjacent two groups The rotation angle of the drum can be determined according to the number of measurement groups. For example, when 4 groups of measurements are required, one group is measured every 90° rotation. When 6 groups of measurements are required, one group is measured every 60° rotation.

[0030] The laser ranging mechanism 4 can be arranged above the drum 5. By scanning the drum 5, the center distance and the surface distance can be obtained. The center distance can be obtained by scanning the axis 51 of the drum 5. The surface distance can be obtained by scanning the surface of the drum 5.

[0031] In some embodiments, referring to Figure 2 , the center distance H is calculated from the distance L from the laser ranging mechanism 4 to the scanning point of the axis 51 of the drum 5 and the angle between the laser beam and the horizontal plane, . The center distance H can be calculated according to the Pythagorean theorem. During detection, the drum 5 is set horizontally, and the laser ranging mechanism 4 is located above the drum 5. The laser ranging mechanism 4 can scan perpendicular to the horizontal plane or at a certain angle to the horizontal plane. According to the Pythagorean theorem, according to the formula , from the distance L from the laser ranging mechanism 4 to the scanning point of the axis 51 of the drum 5 obtained by scanning, and the angle between the laser beam and the horizontal plane, the center distance H can be calculated.

[0032] In some embodiments, referring to Figure 2 , the th surface distance is calculated from the distance from the laser ranging mechanism 4 to the th scanning point on the surface of the drum 5 and the angle between the th laser beam and the horizontal plane, . The surface distance can be calculated according to the Pythagorean theorem. The laser ranging mechanism 4 can scan perpendicular to the horizontal plane or at a certain angle to the horizontal plane. According to the Pythagorean theorem, according to the formula , from the distance from the laser ranging mechanism 4 to the th scanning point on the surface of the drum 5 obtained by scanning, and the angle between the th laser beam and the horizontal plane, the th surface distance can be calculated.

[0033] In the embodiments of the present application, the center distance H can be obtained first, or the surface distance can be obtained first. Of course, it is also possible to obtain the center distance H and multiple surface distances simultaneously , for example, by using a multi-beam lidar, the central distance H and multiple surface distances can be measured simultaneously .

[0034] In some embodiments, the scanning radius at each scanning point is obtained from the difference between the central distance and each surface distance, , is the scanning radius of the drum 5 at the th scanning point, and is the surface distance at the th scanning point. In the embodiments of the present application, the difference between the central distance H and the surface distance is used as the scanning radius . From the central distance H and the surface distance at the th

[0035] scanning point, according to the formula , the scanning radius at the th scanning point can be calculated and is the scanning radius less than the minimum limit value of the set range.

[0036] When obtaining multiple groups of central distances H and surface distances , it can be that the radius of each group is within the set range, then the out-of-roundness of the drum 5 meets the specification. If there is a scanning radius beyond the set range in any group, then the out-of-roundness of the drum 5 does not meet the specification and cannot meet the requirements of the brake test bench detection.

[0037] In some embodiments, to determine the out-of-roundness of the drum 5 according to the scanning radius at each scanning point, it includes: obtaining the maximum radius And the minimum radius If the maximum radius is greater than the maximum limit value of the set range , or the minimum radius is less than the minimum limit value of the set range , then the out-of-roundness of the drum 5 does not meet the specification. Otherwise, the out-of-roundness of the drum 5 meets the specification. In the embodiment of the present application, the scanning radius of each scanning point can be obtained first The maximum radius and the minimum radius in it, and then the maximum radius is compared with the maximum limit value , and the minimum radius is compared with the minimum limit value . If either the maximum radius is greater than the maximum limit value or the minimum radius is less than the minimum limit value is established, it can be determined that the out-of-roundness of the drum 5 does not meet the specification. If neither the maximum radius is greater than the maximum limit value nor the minimum radius is less than the minimum limit value is established, it means that all the scanning radii are within the set range, and it can be determined that the out-of-roundness of the drum 5 meets the specification.

[0038] In an exemplary embodiment, the scanning radii of each scanning point can be sorted according to size to obtain the maximum radius and the minimum radius . After sorting according to size, the values at both ends of the sequence are the maximum radius and the minimum radius .

[0039] In some embodiments, when obtaining multiple sets of center distances H and surface distances , it can be the maximum radius and the minimum radius for each group respectively, or the scanning radii of multiple groups can be sorted together to obtain the maximum radius and the minimum radius .

[0040] In the embodiment of the present application, the scanning radius at each scanning point does not need to calculate the exact radius of the drum 5 and can be obtained through calculation, is the scanning radius of the th scanning point, is the The surface distance at each scanning point. Correspondingly, the set range of the radius of the roller 5 also takes into account the difference between the designed radius of the roller 5 and the radius of the rotating shaft 51.

[0041] In the alternative embodiment, the scanning radius of the roller 5 at each scanning point can also be calculated by the following formula , is the scanning radius of the roller 5 at the th scanning point, is the surface distance at the th scanning point, and

[0042] The embodiment of the present application provides a dynamic detection device for the out-of-roundness of the roller 5 of a braking inspection bench. The device of the embodiment of the present application can implement the method of the above embodiment. The above method embodiment can be used to understand the device of the embodiment of the present application. The description part of the device embodiment below can also be used to understand the method of the above embodiment.

[0043] See Figure 3 , the dynamic detection device for the out-of-roundness of the roller 5 of the braking inspection bench in the embodiment of the present application includes a bracket 1, a laser ranging mechanism 4 and a processing unit. The laser ranging mechanism 4 is arranged on the bracket 1. The laser ranging mechanism 4 is used to obtain the central distance H and a plurality of surface distances , the central distance is the vertical distance from the laser ranging mechanism 4 to the rotating shaft 51 of the roller 5, and the surface distance is the vertical distance from a plurality of scanning points on the surface of the roller 5 to the horizontal plane where the laser ranging mechanism 4 is located. The rotating shaft 51 of the roller 5 is parallel to the horizontal plane. The processing unit is used to calculate the scanning radius of the roller 5 at each scanning point based on the central distance H and a plurality of surface distances , and determine the out-of-roundness of the roller 5 according to the scanning radius at each scanning point.

[0044] In the device of the embodiment of the present application, the upper surface of the roller 5 is scanned by the laser ranging mechanism 4. Using the Pythagorean theorem, the vertical distance from the roller 5 to the laser ranging mechanism 4 can be calculated, and then the scanning radius of the roller 5 can be calculated. The device of the embodiment of the present application is easy to install, easy to operate, and has low cost, and fills the technical gap in detecting the out-of-roundness of the roller 5 by the laser measurement method. The device of the embodiment of the present application has direct economic benefits and is very meaningful for the self-check of the out-of-roundness of the roller 5 of the vehicle detection device.

[0045] In the embodiments of the present application, the laser ranging mechanism 4 may specifically be a lidar or other suitable laser ranging device. The laser ranging mechanism 4 may be a single-beam laser ranging mechanism 4 or a multi-beam laser ranging mechanism 4. In a specific implementation, a multi-beam lidar may be adopted for the laser ranging mechanism 4. For example, an 8-beam, 16-beam, 32-beam, 64-beam, or 128-beam lidar.

[0046] When a multi-beam lidar is adopted, the multiple beams emitted by the lidar may be fan-shaped, and the central distance H and multiple surface distances along the axial direction of the drum can be measured simultaneously. .

[0047] When a single-beam lidar is adopted, the central distance H and multiple surface distances can be measured by horizontally moving the lidar along the axial direction of the drum. Or by rotating the lidar within a plane passing through the axis of the drum to measure the central distance H and multiple surface distances. .

[0048] In some embodiments, the method of the embodiments of the present application may be to obtain multiple sets of central distances H and surface distances along the circumferential direction of the drum. Each set of central distances H may be measured separately or the same data may be adopted. The multiple surface distances of each set are measured separately along the axial direction of the drum. For example, for each measurement of a set of central distance H and surface distance , the drum is rotated by a certain angle, and then the next set of central distance H and surface distance is measured. Of course, it is also possible to only measure the surface distance of the next set , and the central distance H adopts the data measured in the first set. The angle of rotation of the drum for measuring adjacent two sets of central distance H and surface distance can be determined according to the number of sets to be measured. For example, when 4 sets need to be measured, one set is measured every 90°. When 6 sets need to be measured, one set is measured every 60°.

[0049] In some embodiments, the bracket 1 includes a pair of guide rails 11, a pair of support assemblies 12, and a cross beam 13. The pair of guide rails 11 are arranged in parallel. The pair of support assemblies 12 are respectively arranged on the guide rails 11, and the support assemblies 12 can move along the guide rails 11. The two ends of the cross beam 13 are respectively connected to the pair of support assemblies 12, and the laser ranging mechanism 4 is arranged on the cross beam 13. When the support assemblies 12 move along the guide rails 11, the laser ranging mechanism 4 arranged on the cross beam 13 moves accordingly, so that the laser ranging mechanism 4 can be moved to the scanning position. For example, the laser ranging mechanism 4 can be moved above the drum 5.

[0050] The guide rail 11 can be arranged parallel to the roller 5, the cross beam 13 is perpendicular to the roller 5, the support assembly 12 drives the cross beam 13 to move along the guide rail 11, and the laser ranging mechanism 4 moves along the axial direction of the roller 5. By adjusting the position of the laser ranging mechanism 4 in the axial direction of the roller 5, the required data can be obtained. For example, when using a single-beam lidar, moving along the axial direction of the roller 5 can obtain a set of central distances H and surface distances . When using a multi-beam lidar, by adjusting the position of the lidar, the central distance H and multiple surface distances can be obtained simultaneously .

[0051] The guide rail 11 can also be arranged perpendicular to the roller 5, the cross beam 13 is parallel to the roller 5, the support assembly 12 drives the cross beam 13 to move along the guide rail 11, and the laser ranging mechanism 4 moves above the roller 5, so as to obtain the central distance H and multiple surface distances . It is also possible to adjust the position of the laser ranging mechanism 4 in the axial direction of the roller 5 along the cross beam 13. For example, when using a single-beam lidar, moving along the axial direction of the roller 5 can obtain a set of central distances H and surface distances . When using a multi-beam lidar, by adjusting the position of the lidar, the central distance H and multiple surface distances can be obtained simultaneously .

[0052] In some embodiments, the dynamic detection device for the out-of-roundness of the brake test bench roller according to the embodiment of the present application includes a positioning bolt 2, and the positioning bolt 2 is used to fix the support assembly 12 to the guide rail 11. The support assembly 12 may have a positioning screw hole, the positioning bolt 2 is in threaded cooperation with the positioning screw hole, and the end of the positioning bolt 2 abuts against the guide rail 11 to fix the support assembly 12 to the guide rail 11. Rotating the positioning bolt 2 creates a gap between the end of the positioning bolt 2 and the guide rail 11, and the support assembly 12 can slide along the guide rail 11.

[0053] In some embodiments, the bracket 1 includes a connecting seat 123, the connecting seat 123 is arranged on the top of the support assembly 12, and both ends of the cross beam 13 are respectively connected to the connecting seat 123. The cross beam 13 and the connecting seat 123 can be connected by bolts.

[0054] In some embodiments, the connecting seat 123 may have a positioning groove, and the end of the cross beam 13 is arranged in the positioning groove. In an exemplary embodiment, the connecting seat 123 may include a bottom plate and side plates, the bottom plate is connected to the support assembly 12, the side plates are connected to the top surface of the bottom plate, and the side plates and the bottom plate enclose the positioning groove. The side plates can be two or three. Two side plates are arranged opposite to each other to form a U-shaped structure with the bottom plate, and a positioning groove is formed between the two side plates. Three side plates are connected in sequence to enclose a positioning groove with openings at the top and one side.

[0055] In some embodiments, the support 1 further includes a traveling drive mechanism. The traveling drive mechanism is disposed on the support assembly 12 and is configured to drive the support assembly 12 to move along the guide rail 11. The traveling drive mechanism may include, for example, a traveling drive motor and a drive wheel. The drive wheel is connected to the support assembly 12, and the drive wheel is in transmission connection with the guide rail 11. The traveling drive motor is in transmission connection with the drive wheel. The traveling drive motor drives the drive wheel to rotate, thereby traveling along the guide rail 11. The drive wheel and the guide rail 11 may be in frictional connection. When the drive wheel rotates, it travels along the guide rail 11 under the action of friction. The drive wheel and the guide rail 11 may also be in gear engagement. For example, the drive wheel is a gear, and the guide rail 11 has a rack structure, and the gear meshes with the rack structure.

[0056] In some embodiments, the traveling drive mechanism may be connected to the processing unit, and the processing unit controls the traveling drive mechanism to drive the support assembly 12 to move along the guide rail 11. In a specific implementation, the processing unit may be connected to the drive motor. By controlling through the processing unit, manual operation can be reduced, and automation and efficiency can be improved.

[0057] In some embodiments, the support assembly 12 includes a base 121 and a reciprocating telescopic mechanism 122. The base 121 is slidably connected to the guide rail 11. The reciprocating telescopic mechanism 122 is disposed on the base 121, and the cross beam 13 is connected to the reciprocating telescopic mechanism 122. The reciprocating telescopic mechanism 122 drives the cross beam 13 to move up and down. The height of the laser ranging mechanism 4 can be adjusted by the reciprocating telescopic mechanism 122. The reciprocating telescopic mechanism 122 may include a cylinder, a hydraulic cylinder, an electric cylinder, etc.

[0058] In an exemplary embodiment, the connecting seat 123 may be disposed on the top of the reciprocating telescopic mechanism 122.

[0059] In some embodiments, the reciprocating telescopic mechanism 122 is connected to the processing unit, and the processing unit controls the reciprocating telescopic mechanism 122 to extend or contract. The height of the laser ranging mechanism 4 can be adjusted by controlling the reciprocating telescopic mechanism 122 to extend or contract through the processing unit. By controlling through the processing unit, manual operation can be reduced, and automation and efficiency can be improved.

[0060] In some embodiments, the support assembly 12 may include a sliding seat assembly. The sliding seat assembly is slidably connected to the cross beam 13, and the laser ranging mechanism 4 is disposed on the sliding seat assembly. The sliding seat assembly can drive the laser ranging mechanism 4 to move along the cross beam 13, so that the laser ranging mechanism 4 is convenient for measuring the center distance H and the surface distance 。

[0061] The sliding seat assembly may be connected to the processing unit, and the processing unit controls the sliding seat assembly to drive the laser ranging mechanism 4 to move along the cross beam to adjust the scanning position.

[0062] In some embodiments, the detection device of the embodiments of the present application further includes a universal support 3, the universal support 3 is arranged on the cross beam 13, the laser ranging mechanism 4 is arranged on the universal support 3, the universal support 3 is connected to the processing unit, and the processing unit controls the universal support 3 to drive the laser ranging mechanism 4 to rotate so as to adjust the scanning direction. The universal support 3 can enable the laser ranging mechanism 4 to rotate 360 degrees.

[0063] The processing unit in the present application includes, but is not limited to, PLC, MCU, etc.

[0064] The embodiments of the present application provide an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the method of any one of the above is implemented.

[0065] Please refer to Figure 4 , which is a schematic structural diagram of an electronic device provided by the embodiments of the present application. As Figure 4 shown, the electronic device 600 may include: at least one processor 601, at least one network interface 604, a user interface 603, a memory 605, and at least one communication bus 602.

[0066] Among them, the communication bus 602 is used to realize the connection and communication between these components.

[0067] Among them, the user interface 603 may include a display screen (Display), a camera (Camera). Optionally, the user interface 603 may further include a standard wired interface and a wireless interface.

[0068] Among them, the network interface 604 may optionally include a standard wired interface and a wireless interface (such as a WI-FI interface).

[0069] Among them, the processor 601 may include one or more processing cores. The processor 601 connects various parts within the entire electronic device 600 through various interfaces and circuits. By running or executing instructions, programs, code sets, or instruction sets stored in the memory 605, and by calling the data stored in the memory 605, it performs various functions of the electronic device 600 and processes data. Optionally, the processor 601 may be implemented in at least one hardware form of digital signal processing (DSP), field-programmable gate array (FPGA), or programmable logic array (PLA). The processor 601 may integrate a combination of one or more of a central processing unit (CPU), a graphics processing unit (GPU), and a modem, etc. Among them, the CPU mainly processes the operating system, user interface, application programs, etc.; the GPU is responsible for rendering and drawing the content to be displayed on the display screen; the modem is used to process wireless communication. It can be understood that the above-mentioned modem may not be integrated into the processor 601 and may be implemented separately by a single chip.

[0070] Among them, the memory 605 may include random access memory (RAM) and may also include read-only memory. Optionally, the memory 605 includes a non-transitory computer-readable storage medium. The memory 605 can be used to store instructions, programs, code, code sets, or instruction sets. The memory 605 may include a program storage area and a data storage area. Among them, the program storage area may store instructions for implementing the operating system, instructions for at least one function (such as touch function, sound playback function, image playback function, etc.), instructions for implementing the above-mentioned various method embodiments, etc.; the data storage area may store the data involved in the above-mentioned various method embodiments. Optionally, the memory 605 may also be at least one storage device located far from the aforementioned processor 601. As Figure 4 shown, the memory 605, as a computer storage medium, may include an operating system, a network communication module, a user interface module, and application programs.

[0071] In Figure 4In the electronic device 600 shown, the user interface 603 is mainly used to provide an interface for the user to input and obtain the data input by the user; and the processor 601 can be used to call the application programs stored in the memory 605 and specifically execute the operations of any of the above method embodiments.

[0072] This application also provides a computer-readable storage medium, on which a computer program is stored, and when the program is executed by a processor, the steps of the above method are implemented. Among them, the computer-readable storage medium may include, but is not limited to, any type of disk, including floppy disks, optical disks, DVDs, CD-ROMs, microdrives, and magneto-optical disks, ROMs, RAMs, EPROMs, EEPROMs, DRAMs, VRAMs, flash memory devices, magnetic cards or optical cards, nanosystems (including molecular memory ICs), or any type of medium or device suitable for storing instructions and / or data.

[0073] The embodiment of this application also provides a computer program product, which includes a non-transitory computer-readable storage medium storing a computer program, and the computer program is operable to cause a computer to execute some or all of the steps of any one of the methods described in the above method embodiments.

[0074] Those skilled in the art can clearly understand that the technical solutions of this application can be implemented by means of software and / or hardware. The "units" and "modules" in this specification refer to software and / or hardware that can complete specific functions independently or in cooperation with other components. Among them, the hardware can be, for example, a Field-Programmable Gate Array (FPGA), an Integrated Circuit (IC), etc.

[0075] It should be noted that for the foregoing method embodiments, for the sake of simple description, they are all expressed as a series of action combinations. However, those skilled in the art should know that this application is not limited by the described action sequence, because according to this application, certain steps can be performed in other sequences or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily essential to this application.

[0076] In the above embodiments, the descriptions of the various embodiments have their own emphases. For the parts not detailed in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0077] In several embodiments provided by the present application, it should be understood that the disclosed device can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed coupling or direct coupling or communication connection between each other can be through some interfaces. The indirect coupling or communication connection of the device or unit can be in an electrical or other form.

[0078] The units described as separate components may or may not be physically separated. The components displayed as units may or may not be physical units, that is, they can be located in one place, or they can be distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0079] In addition, in each embodiment of the present application, each functional unit can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.

[0080] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable memory. Based on such an understanding, the technical solution of the present application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a memory and includes several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods in each embodiment of the present application. And the aforementioned memory includes: USB flash drives, read-only memories (ROM), random access memories (RAM), mobile hard disks, magnetic disks, or optical discs, etc., which can store program codes.

[0081] Those of ordinary skill in the art can understand that all or part of the steps in the various methods of the above embodiments can be completed by instructing relevant hardware through a program. This program can be stored in a computer-readable memory. The memory can include: flash drives, read-only memories (ROM), random access memories (RAM), magnetic disks, or optical discs, etc.

[0082] The foregoing are only exemplary embodiments of the present disclosure, and thus cannot limit the scope of the present disclosure. That is, any equivalent changes and modifications made in accordance with the teachings of the present disclosure still fall within the scope covered by the present disclosure. Those skilled in the art will readily conceive of other embodiments of the present disclosure after considering the specification and practicing the disclosure herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include known common general knowledge or conventional technical means in the technical field not recorded in the present disclosure. The specification and examples are only to be regarded as exemplary, and the scope and spirit of the present disclosure are defined by the claims.

Claims

1. A dynamic detection method for the out-of-roundness of the rollers of a braking test bench, characterized in that, Comprising: Obtaining the central distance H, which is the vertical distance from the laser ranging mechanism to the roller shaft; Obtain multiple surface distances , where the surface distances are the vertical distances from multiple scanning points along the axial direction on the surface of the drum to the horizontal plane where the laser ranging mechanism is located, and the axis of the drum is parallel to the horizontal plane; Based on the center distance H and the multiple surface distances , calculate the scanning radius of the drum at each scanning point ; According to the scanning radius at each scanning point Determine the out-of-roundness of the drum.

2. The dynamic detection method for the out-of-roundness of the brake test bench drum according to claim 1, wherein The central distance H is calculated from the distance L from the laser ranging mechanism to the scanning point of the roller rotating shaft and the angle α between the laser beam and the horizontal plane. .

3. The dynamic detection method for the out-of-roundness of the brake test bench drum according to claim 1, characterized in that The surface distance from the laser distance measuring mechanism to the distance of the th scan point on the drum surface is calculated from .

4. The dynamic detection method for the out-of-roundness of the brake test bench drum according to claim 1, characterized in that Scanning radius at each scanning point Obtained from the difference between the center distance and the surface distances , is the scanning radius of the th scanning point, the th surface distance at the scanning point 5. The dynamic detection method for the out-of-roundness of the brake test bench drum according to claim 4, characterized in that According to the scanning radius at each scanning point Determine the out-of-roundness of the drum, including: The scanning radius at each scanning point is within the set range, then the out-of-roundness of the drum complies with the specification; otherwise, the out-of-roundness of the drum does not comply with the specification.

6. The dynamic detection method for the out-of-roundness of the brake test bench drum according to claim 5, characterized in that According to the scanning radius at each scanning point Determine the out-of-roundness of the drum, including: Obtain the maximum radius among the scanning radii of each scanning point and the minimum radius . If the maximum radius is greater than the maximum limit value of the set range , or the minimum radius is less than the minimum limit value of the set range , then the out-of-roundness of the drum does not meet the specification; otherwise, the out-of-roundness of the drum meets the specification.

7. A dynamic detection device for the out-of-roundness of the rollers of a braking inspection bench, characterized in that, Including: A bracket; A laser distance measuring mechanism is provided on the bracket, and the laser distance measuring mechanism is used to obtain a central distance H and a plurality of surface distances. The central distance is the vertical distance from the laser distance measuring mechanism to the roller shaft, and the surface distance is the vertical distance from a plurality of scanning points along the axial direction on the roller surface to the horizontal plane where the laser distance measuring mechanism is located. The roller shaft is parallel to the horizontal plane. A processing unit for calculating the scanning radius of the drum at each scanning point based on the central distance H and a plurality of the surface distances and determining the out-of-roundness of the drum according to the scanning radius at each scanning point ​​ 8. The dynamic detection device for the out-of-roundness of the brake test bench drum according to claim 7, characterized in that, The bracket includes: A pair of guide rails, arranged in parallel; A pair of support components, respectively arranged on the guide rails, and the support components can move along the guide rails; A cross beam, with both ends respectively connected to a pair of support components, and the laser ranging mechanism is arranged on the cross beam.

9. The dynamic detection device for the out-of-roundness of the brake test bench drum according to claim 8, characterized in that, The support component includes: A base, which is slidably connected to the guide rail; A reciprocating telescopic mechanism, arranged on the base, the cross beam is connected to the reciprocating telescopic mechanism, and the reciprocating telescopic mechanism drives the cross beam to rise and fall; The reciprocating telescopic mechanism is connected to the processing unit, and the processing unit controls the reciprocating telescopic mechanism to extend or contract.

10. The dynamic detection device for the out-of-roundness of the brake test bench drum according to claim 8, characterized in that, Further comprising: A universal support, arranged on the cross beam, the laser ranging mechanism is arranged on the universal support, the universal support is connected to the processing unit, and the processing unit controls the universal support to drive the laser ranging mechanism to rotate so as to adjust the scanning direction.

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