A method, system and device for pre-press detection of a bogie

Abstract

The application discloses a bogie pre-press detection method, system and device, and the method comprises the following steps: under the condition that a preset detection state is met between the bogie and a hydraulic cylinder, controlling the hydraulic cylinder to exert pressure on the bogie; under the condition that the actual pressure exerted by the hydraulic cylinder on the bogie reaches a preset pressure, controlling a distance measuring device to detect the loading distance between the detection end and the surface to be detected; under the condition that the actual position of the hydraulic cylinder rises to a preset original point, controlling the distance measuring device to detect the free distance between the detection end and the surface to be detected; and according to the loading distance, the free distance, a preset standard height and a preset zero point distance, determining the actual height between the surface to be detected and the track surface. It can be seen that the distance between the non-contact distance measuring device and the surface to be detected is directly detected, the risk of data distortion caused by loosening or displacement deformation of the grating ruler in the traditional method is avoided, the detection accuracy is improved, the execution action of the hydraulic cylinder to the zero pressure state in the measurement process is reduced, and the detection efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of rail vehicle testing technology, and in particular to a method, system and device for detecting the preload of a bogie. Background Technology

[0002] In the preload test of the bogie, a simulated load is applied to the bogie using a hydraulic cylinder, and the height parameters of key bogie components (such as the center plate and side bearings) are measured to determine whether the bogie's performance meets safety standards.

[0003] Traditional preload detection methods primarily rely on measuring the extension and retraction of hydraulic cylinders to indirectly calculate height parameters. However, this indirect measurement method obtains height parameters through the displacement change of the press-fit surface where the hydraulic cylinder directly contacts the bogie. If the press-fit surface is loose, the measurement accuracy can easily decrease. Therefore, improving the detection accuracy of preload testing is a pressing technical problem that needs to be solved. Summary of the Invention

[0004] This application provides a bogie preload detection method, system, and apparatus, which solves the technical problem of low detection accuracy in the prior art and achieves the technical effect of improving the detection accuracy of preload detection.

[0005] In a first aspect, this application provides a method for detecting the preload of a bogie, applied to a preload detection system. The preload detection system includes a hydraulic cylinder and a ranging device. The ranging device is mounted on the base of the hydraulic cylinder, and the detection end of the ranging device faces the test surface of the bogie to be tested. The bogie is placed on a track. The method includes:

[0006] When the preset detection state is met between the bogie and the hydraulic cylinder, control the hydraulic cylinder to apply pressure to the bogie;

[0007] When the actual pressure applied by the hydraulic cylinder to the bogie reaches the preset pressure, the distance measuring device is controlled to detect the loading distance between the detection end and the surface to be measured.

[0008] When the hydraulic cylinder rises to the preset origin position, the ranging device is controlled to detect the free distance between the detection end and the surface to be measured.

[0009] The actual height between the surface to be measured and the track surface is determined based on the loading distance, free distance, preset standard height, and preset zero point distance.

[0010] Furthermore, based on the loading distance, free distance, preset standard height, and preset zero-point distance, the actual height between the surface to be measured and the track surface is determined, including:

[0011] The actual loading height between the surface to be tested and the track surface is determined based on the loading distance, the preset standard height, and the preset zero point distance.

[0012] The actual free height between the surface to be measured and the track surface is determined based on the free distance, the preset standard height, and the preset zero point distance; the actual height includes the actual loading height and the actual free height.

[0013] Furthermore, the preset zero-point distance is obtained through the following steps:

[0014] When the preset detection state is met between the standard part and the hydraulic cylinder, the distance measuring device is controlled to detect the preset zero-point distance between the detection end and the standard surface of the standard part.

[0015] Furthermore, before the preset detection state is met between the standard part and the hydraulic cylinder, the following steps are also included:

[0016] The base surface of the control standard part is parallel to the track surface;

[0017] The control standard plane is parallel to the track plane.

[0018] Furthermore, before determining the actual height between the surface to be measured and the track surface based on the loading distance, free distance, preset standard height, and preset zero-point distance, the method also includes:

[0019] Determine whether the surface to be measured is tilted based on the loaded distance or free distance detected by at least three ranging devices installed on the same plane.

[0020] Furthermore, the ranging device includes a center plate ranging device, and the surface to be measured includes the center plate surface of the center plate component of the bogie;

[0021] The loading distance includes the loading distance between the heart plate detection end of the heart plate ranging device and the heart plate surface to be measured;

[0022] The free distance includes the free distance between the cardiac disc detection end and the surface of the cardiac disc to be tested.

[0023] Furthermore, the ranging device includes a side bearing ranging device, and the surface to be measured includes the side bearing surface of the bogie's side bearing component;

[0024] The loading distance includes the load distance between the side bearing detection end of the side bearing measuring device and the side bearing surface to be measured;

[0025] The free distance includes the free distance between the side bearing detection end and the side bearing surface to be tested.

[0026] Secondly, this application provides a pre-compression detection system, the system comprising:

[0027] Hydraulic cylinder;

[0028] The ranging device is mounted on the base of the hydraulic cylinder, and the detection end of the ranging device is opposite to the surface to be measured of the bogie to be measured.

[0029] The controller is connected to the hydraulic cylinder and the ranging device respectively, and is used to perform a bogie preload detection method as provided in the first aspect.

[0030] Furthermore, the ranging device includes:

[0031] The bogie center plate distance measuring device consists of multiple devices spaced apart on the same plane, with the detection end of each device facing the center plate surface of the bogie to be tested.

[0032] Side bearing distance measuring devices include a right side bearing distance measuring device and a left side bearing distance measuring device. The right side bearing distance measuring device is set on one side of the base and faces the right side bearing surface to be measured on the bogie. The left side bearing distance measuring device is set on the other side of the base and faces the left side bearing surface to be measured on the bogie.

[0033] Thirdly, this application provides a preload detection device applied to a preload detection system, the preload detection system including a hydraulic cylinder and a distance measuring device; the distance measuring device is mounted on the base of the hydraulic cylinder, the detection end of the distance measuring device is opposite to the test surface of the bogie to be tested, the bogie is placed on the track, and the device includes:

[0034] The loading module is used to control the hydraulic cylinder to apply pressure to the bogie when a preset detection state is met between the bogie and the hydraulic cylinder;

[0035] The loading distance detection module is used to control the distance measuring device to detect the loading distance between the detection end and the surface to be measured when the actual pressure applied by the hydraulic cylinder to the bogie reaches the preset pressure.

[0036] The free distance detection module is used to control the distance measuring device to detect the free distance between the detection end and the surface to be measured when the actual position of the hydraulic cylinder rises to the preset origin position.

[0037] The actual height determination module is used to determine the actual height between the surface to be measured and the track surface based on the loading distance, free distance, preset standard height, and preset zero point distance.

[0038] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0039] This application provides a method for preload detection of a bogie, comprising: controlling the hydraulic cylinder to apply pressure to the bogie when a preset detection state is met between the bogie and the hydraulic cylinder; controlling the loading distance between the detection end of the ranging device and the surface to be measured when the actual pressure applied by the hydraulic cylinder to the bogie reaches the preset pressure; controlling the free distance between the detection end of the ranging device and the surface to be measured when the actual position of the hydraulic cylinder rises to the preset origin position; and determining the actual height between the surface to be measured and the track surface based on the loading distance, free distance, preset standard height, and preset zero point distance. As can be seen, this application embodiment directly detects the distance between the surface to be measured and the surface to be measured using a non-contact ranging device, avoiding the risk of data distortion caused by loose or deformed grating ruler positioning in traditional methods, thus improving detection accuracy. It also avoids the zero-pressure judgment of the press-fit surface in traditional methods, reducing the hydraulic cylinder's execution of zero-pressure state actions during measurement, shortening the total detection time of preload detection, and improving detection efficiency. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0041] Figure 1 This is a schematic diagram of the structure of a pre-compression detection system provided in an embodiment of this application;

[0042] Figure 2 This is a schematic diagram of the structure of a mounting component for a center-disc ranging device provided in an embodiment of this application;

[0043] Figure 3 A schematic flowchart illustrating a bogie preload detection method provided in an embodiment of this application;

[0044] Figure 4 A schematic diagram illustrating the principle of the disc ranging device for detecting disc loading distance provided in this application embodiment;

[0045] Figure 5 A schematic diagram illustrating the principle of the disc ranging device for detecting the free distance of the disc provided in this application embodiment;

[0046] Figure 6 A schematic diagram of the structure of a standard part provided in an embodiment of this application;

[0047] Figure 7 This is a schematic diagram of the structure of a pre-compression detection device provided in an embodiment of this application;

[0048] Figure 8This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application;

[0049] In the above diagram: 1. Hydraulic cylinder; 101. Base; 21. Mounting component; 201. Center plate distance measuring device; 3. Bogie; 31. Center plate surface to be measured; 4. Standard component; 41. Standard surface; 42. Foot; 5. Track. Detailed Implementation

[0050] This application provides a bogie preload detection method, which solves the technical problem of low detection accuracy in the prior art.

[0051] The technical solution of this application embodiment is to solve the above-mentioned technical problems, and the general idea is as follows:

[0052] This application provides a method for preload detection of a bogie, comprising: controlling the hydraulic cylinder to apply pressure to the bogie when a preset detection state is met between the bogie and the hydraulic cylinder; controlling the loading distance between the detection end of the ranging device and the surface to be measured when the actual pressure applied by the hydraulic cylinder to the bogie reaches the preset pressure; controlling the free distance between the detection end of the ranging device and the surface to be measured when the actual position of the hydraulic cylinder rises to the preset origin position; and determining the actual height between the surface to be measured and the track surface based on the loading distance, free distance, preset standard height, and preset zero point distance. As can be seen, this application embodiment directly detects the distance between the surface to be measured and the surface to be measured using a non-contact ranging device, avoiding the risk of data distortion caused by loose or deformed grating ruler positioning in traditional methods, thus improving detection accuracy. It also avoids the zero-pressure judgment of the press-fit surface in traditional methods, reducing the hydraulic cylinder's execution of zero-pressure state actions during measurement, shortening the total detection time of preload detection, and improving detection efficiency.

[0053] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0054] First, it should be clarified that the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0055] In the preload test of the bogie, a simulated load is applied to the bogie using a hydraulic cylinder, and the height parameters of key bogie components (such as the center plate and side bearings) are measured to determine whether the bogie's performance meets safety standards.

[0056] The center plate assembly is located at the geometric center of the bogie and is connected to the center pin hole at the bottom of the car body through the center plate seat. It forms the main support point between the car body and the bogie and is used to transmit the longitudinal force (traction / braking force) between the car body and the bogie, guiding the bogie to rotate around the vertical axis.

[0057] Side bearing components are typically installed on both sides of the bogie (symmetrically), located at the end of the bogie or above the side beam, corresponding to the side bearing seats at the bottom of the car body. They are used to limit the car body roll (lateral sway) and provide lateral stability, buffering the lateral force between the car body and the bogie through elastic elements.

[0058] The center plate component, as the main support point, bears most of the longitudinal load, while the side bearing components mainly provide lateral constraints. Together, they maintain the vehicle body level.

[0059] Traditional preload detection methods primarily utilize the extension and retraction of the hydraulic cylinder to indirectly calculate height parameters. Taking the measurement of the bogie center plate loading height as an example: with the hydraulic cylinder rising to the origin position, the height value of the grating ruler at the origin position is recorded as a baseline (defined as h1). With the hydraulic cylinder driving the grating ruler downwards, the pressure head contacting the bogie center plate surface and applying pressure, the height value of the grating ruler at the extended position is recorded (defined as h2). The loading height of the center plate component is calculated using the difference: Center plate loading height = h1 - h2.

[0060] In preload testing, it is usually necessary to determine multiple height parameters for different components (such as the core plate component and the side bearing component). For example, on the same component, at least the corresponding loaded height and free height need to be measured.

[0061] Loading height refers to the height between the component and the reference surface when it is loaded to a specified pressure.

[0062] Free height refers to the height of the component between itself and a reference surface when it is unloaded (usually after pressure is applied to test the rebound effect).

[0063] Taking the center plate component as an example, the preload detection method in the prior art is further explained, including:

[0064] The hydraulic cylinder rises to the preset origin position, controlled by a photoelectric switch, and the grating ruler records the origin height value h1. The hydraulic cylinder drives the grating ruler to descend, and the pressure head contacts the bogie pressing surface (center plate surface) and applies pressure. Pressure is continuously applied until the preset pressure value is reached (e.g., simulating an empty or fully loaded state), and the grating ruler records the height value h2 at the extended position. h1-h2 is calculated as the center plate loading height.

[0065] The hydraulic cylinder rises back to its origin, preparing for zero-pressure testing. The hydraulic cylinder then descends again, this time aiming to apply zero pressure to the pressing surface. Based on the zero-pressure determination by the pressure sensor located on the pressing surface, the descent distance of the hydraulic cylinder is controlled. At this point, the pressure head contacts the pressing surface but does not exert pressure. A linear scale measures the height value h3 under zero-pressure conditions to verify the rebound performance of the mandrel component, and h1-h3 is calculated as the free height of the mandrel. After the test is completed, the cylinder rises back to its origin for the final time.

[0066] It is evident that the existing pre-pressure testing process has several shortcomings, including: the grating ruler itself has a zero-point error of ±1.5mm; since the hydraulic cylinder needs to descend to the pressing surface each time, if the pressing surface is not firmly fixed, its looseness will transmit false displacement signals; both origin positioning rely on photoelectric switches, and if the photoelectric switches are offset, it is easy to cause errors in the reference value H1; the pressure sensor is prone to zero-point drift, thus distorting the zero-pressure state of the pressing surface; the testing process involves multiple hydraulic cylinder lifting and pressure adjustment, resulting in redundant mechanical actions, which usually takes 75 seconds and is difficult to meet the requirements of efficient testing.

[0067] To address the aforementioned issues, this application provides a bogie preload detection method, which is applied to a preload detection system provided in this application and can be executed by a controller within the preload detection system.

[0068] First, the pre-compression detection system will be explained. For example... Figure 1 The figure shown is a schematic diagram of a pre-pressure detection system provided in an embodiment of this application. The system includes: a hydraulic cylinder 1, a ranging device and a controller (not shown in the figure), and the hydraulic cylinder 1 and the ranging device are respectively connected to the controller.

[0069] Hydraulic cylinder 1 applies pressure to the bogie (not shown) placed beneath it by descending. A ranging device is mounted on a base 101 of hydraulic cylinder 1 via mounting bracket 21; the base 101 is fixed and does not move with hydraulic cylinder 1. The detection end of the ranging device is opposite to the surface to be measured of the bogie. It is understood that "opposite" refers to the vertical projection of the detection end onto the surface to be measured.

[0070] The ranging equipment includes a center plate ranging device 201 and a side bearing ranging device (not shown in the figure).

[0071] Three center plate distance measuring devices 201 are equally spaced around the base 101 in the same plane, and the detection end of each center plate distance measuring device 201 is perpendicular to the center plate surface of the bogie to be measured. The structure of the mounting component 21 of the center plate distance measuring device 201 is as follows. Figure 2As shown, the upper end of the mounting component 21 is sleeved on the base 101, and the lower end of the mounting component 21 includes three long plates, the bottom end of each long plate being folded inward so that the center plate ranging device 201 can be installed at the fold.

[0072] The side bearing distance measuring device includes a right side bearing distance measuring device (not shown in the figure) and a left side bearing distance measuring device (not shown in the figure). The right side bearing distance measuring device is located on one side of the base 101 and is perpendicular to the right side bearing surface of the bogie to be measured. The left side bearing distance measuring device is located on the other side of the base 101 and is perpendicular to the left side bearing surface of the bogie to be measured. Furthermore, two right side bearing distance measuring devices and two left side bearing distance measuring devices are provided.

[0073] Furthermore, the ranging equipment includes a laser rangefinder sensor. A Mean Well NDR series power module is used to separately power the laser rangefinder sensor to reduce power supply interference. Simultaneously, twisted-pair shielded cables are used, and shielding ferrite cores are placed at both ends of the signal cable to further reduce power supply and signal interference.

[0074] Having described the preload detection system above, this application will now further describe a preload detection method for a bogie.

[0075] like Figure 3 The diagram shown is a flowchart of a bogie preload detection method provided in an embodiment of this application, including steps S1-S4.

[0076] Step S1: When the preset detection state is met between the bogie and the hydraulic cylinder 1, control the hydraulic cylinder 1 to apply pressure to the bogie;

[0077] Step S2: When the actual pressure applied by the hydraulic cylinder 1 to the bogie reaches the preset pressure, control the ranging device to detect the loading distance between the detection end and the surface to be measured.

[0078] Step S3: When the hydraulic cylinder 1 rises to the preset origin position, control the ranging device to detect the free distance between the detection end and the surface to be measured.

[0079] Step S4: Determine the actual height between the surface to be measured and the track surface based on the loading distance, free distance, preset standard height, and preset zero point distance.

[0080] Regarding step S1, when the preset detection state is met between the bogie and the hydraulic cylinder 1, the hydraulic cylinder 1 is controlled to apply pressure to the bogie.

[0081] Predicted inspection conditions refer to the standardized initial conditions that the bogie must meet before inspection. For example, the bogie is placed horizontally on the track and the surface to be tested is parallel to the track, and the pressure head of hydraulic cylinder 1 is aligned with the vertical projection of the surface to be tested (the surface to be tested is directly below the pressure head).

[0082] Regarding step S2, when the actual pressure applied by the hydraulic cylinder 1 to the bogie reaches the preset pressure, the distance measuring device is controlled to detect the loading distance between the detection end and the surface to be measured.

[0083] Preset pressures are used to simulate the actual load of a vehicle under specific working conditions, such as empty vehicle pressure (vehicle weight), full load pressure (vehicle load limit), and test pressure (the key point between empty vehicle pressure and full load pressure, such as 50% load).

[0084] The ranging equipment includes a center plate ranging device 201 and a side bearing ranging device. The surfaces to be measured include the center plate surface of the center plate component of the bogie and the side bearing surface of the side bearing component. Correspondingly, the loading distance includes the center plate loading distance between the center plate detection end of the center plate ranging device 201 and the center plate surface to be measured, and the side bearing loading distance between the side bearing detection end of the side bearing ranging device and the side bearing surface to be measured.

[0085] like Figure 4 The diagram shown is a schematic representation of the principle of the disc ranging device 201 provided in this application for detecting the disc loading distance. It should be noted that the yellow structure in the diagram represents the mounting component 21 of the disc ranging device 201 (connected to...). Figure 1 and Figure 2 (Corresponding), the blue structure in the figure is the center plate ranging device 201. Figure 4 The state shown is as follows: the actual pressure applied by hydraulic cylinder 1 to the test center plate surface 31 of bogie 3 has reached the preset pressure. At this time, the control center plate distance measuring device 201 detects the center plate loading distance D1 between the center plate detection end and the test center plate surface 31.

[0086] Regarding step S3, when the hydraulic cylinder 1 rises to the preset origin position, the distance measuring device is controlled to detect the free distance between the detection end and the surface to be measured.

[0087] The preset origin position refers to the position state in which the hydraulic cylinder 1 does not apply any pressure to the bogie, at which point the bogie is in a zero-pressure state.

[0088] The distance measuring equipment includes a center plate distance measuring device 201 and a side bearing distance measuring device. The surfaces to be measured include the center plate surface to be measured of the center plate component of the bogie and the side bearing surface to be measured of the side bearing component. Correspondingly, the free distance includes the center plate free distance between the center plate detection end and the center plate surface to be measured, and the side bearing free distance between the side bearing detection end and the side bearing surface to be measured.

[0089] like Figure 5 The diagram shown is a schematic representation of the principle of the disc ranging device 201 provided in this application for detecting the free distance of the disc. It should be noted that the yellow structure in the diagram represents the mounting component 21 of the disc ranging device 201 (connected to...). Figure 1 and Figure 2(Corresponding), the blue structure in the figure is the center plate ranging device 201. Figure 5 The state shown is as follows: the hydraulic cylinder 1 has risen to the preset origin position, and the test center plate surface 31 of the bogie 3 has reached the rebound state according to its own rebound ability after bearing the pressure. At this time, the control center plate distance measuring device 201 detects the center plate free distance D2 between the center plate detection end and the test center plate surface 31.

[0090] Regarding step S4, the actual height between the surface to be measured and the track surface is determined based on the loading distance, free distance, preset standard height, and preset zero-point distance. This includes steps S41-S42.

[0091] Step S41: Determine the actual loading height between the surface to be tested and the track surface based on the loading distance, the preset standard height, and the preset zero point distance;

[0092] Step S42: Determine the actual free height between the surface to be measured and the track surface based on the free distance, the preset standard height, and the preset zero point distance; the actual height includes the actual loading height and the actual free height.

[0093] The preset standard height refers to the height between the standard surface on the standard part and the track surface. The standard part is a standard workpiece that matches the bogie to be measured, and the height parameters of each component on the standard part are obtained through a higher-level measuring device. Before performing step S1, the standard part can also be used to calibrate the ranging device.

[0094] The preset zero-point distance refers to the distance between the detection end of the ranging device and the standard surface of the standard part when the preset detection state is met between the standard part and the hydraulic cylinder 1.

[0095] For example, the structure of a standard part is as follows: Figure 6 As shown, the standard part 4 includes two feet 42 and a standard surface 41. Before the standard part 4 and the hydraulic cylinder 1 meet the preset detection state, the standard part 4 needs to be placed on the track 5, and the foot surfaces of the feet 42 of the standard part 4 need to be controlled to be parallel to the track surface, and the standard surface 41 needs to be controlled to be parallel to the track surface.

[0096] It is understandable that when the surface to be tested includes both the center plate surface and the side bearing surface, the standard part also has corresponding standard center plate surfaces and standard side bearing surfaces. The preset standard height includes the preset center plate standard height of the standard center plate surface and the preset side bearing standard height of the standard side bearing surface. The preset zero-point distance includes the preset center plate zero-point distance between the center plate detection end and the standard center plate surface, and the preset side bearing zero-point distance between the side bearing detection end and the standard side bearing surface.

[0097] In other words, the actual loading height of the center plate between the center plate to be tested and the track surface is determined based on the center plate loading distance, the preset center plate standard height, and the preset center plate zero point distance. For example... Figure 4 As shown, the actual loading height H1 of the test plate surface 31 is equal to the preset standard height of the plate - (the loading distance of the plate D1 - the preset zero point distance of the plate).

[0098] Based on the center plate free distance, the preset center plate standard height, and the preset center plate zero point distance, determine the actual center plate free height between the center plate surface to be measured and the track surface. For example... Figure 5 As shown, the actual free height H2 of the test disc surface 31 is equal to the preset standard height of the disc - (free distance of the disc D2 - preset zero point distance of the disc).

[0099] The actual load height of the side bearing between the side bearing surface to be tested and the track surface is determined based on the side bearing loading distance, the preset standard height of the side bearing, and the preset zero point distance of the side bearing. The actual free height of the side bearing between the side bearing surface to be tested and the track surface is determined based on the side bearing free distance, the preset standard height of the side bearing, and the preset zero point distance of the side bearing.

[0100] Furthermore, each detection process of the ranging device is divided into an acquisition period and a calculation period.

[0101] During the data collection period, the ranging device collects multiple data points (e.g., 100 data points per second), and then calculates the average value of all collected data.

[0102] The maximum and minimum values ​​in the collected data are compared with the average value. If the difference exceeds a preset threshold, the collected data is considered to be interfered with, and remeasurement is required. After the number of remeasurements exceeds a preset number, an abnormal signal is generated to indicate that the ranging device has a measurement malfunction.

[0103] If it is determined that there is no interference in the collected data, the calculation period begins. The maximum and minimum values ​​of all collected data are removed, and the average value of the remaining collected data is calculated as the output value (loaded distance or free distance) of the ranging device.

[0104] Before determining the actual height between the surface to be measured and the track surface based on the loading distance, free distance, preset standard height, and preset zero point distance in step S4, the method further includes:

[0105] Determine whether the surface to be measured is tilted based on the loaded distance or free distance detected by at least three ranging devices installed on the same plane.

[0106] If the loaded distance or free distance detected by at least three ranging devices is equal or similar (within the error range), it is determined that the surface to be measured is not tilted.

[0107] If the loaded distance or free distance detected by at least three ranging devices shows a linear gradient change or differs significantly, the surface to be measured is determined to be tilted. If the surface to be measured is tilted, it does not meet production standards.

[0108] In summary, this application provides a method for preload detection of a bogie, comprising: controlling the hydraulic cylinder 1 to apply pressure to the bogie when a preset detection state is met between the bogie and the hydraulic cylinder 1; controlling the loading distance between the detection end of the ranging device and the surface to be measured when the actual pressure applied by the hydraulic cylinder 1 to the bogie reaches the preset pressure; controlling the free distance between the detection end of the ranging device and the surface to be measured when the actual position of the hydraulic cylinder 1 rises to the preset origin position; and determining the actual height between the surface to be measured and the track surface based on the loading distance, free distance, preset standard height, and preset zero point distance. It is evident that this application embodiment directly detects the distance between the surface to be measured and the surface to be measured using a non-contact ranging device, avoiding the risk of data distortion caused by loose positioning or displacement deformation of the grating ruler in traditional methods, thus improving detection accuracy. It also avoids the zero-pressure judgment of the press-fit surface in traditional methods, reducing the execution action of the hydraulic cylinder 1 in the zero-pressure state during the measurement process, shortening the total detection time of preload detection, and improving detection efficiency.

[0109] After adopting the bogie preload detection method provided in this application embodiment, the total detection time of the entire preload detection process on a certain production line is only 18 seconds, which saves 57 seconds compared to the 75 seconds required by the traditional method, greatly improving the detection efficiency.

[0110] Based on the same inventive concept, embodiments of this application also provide, as follows: Figure 7 The preload detection device shown is applied to a preload detection system provided in the embodiments of this application. The device includes:

[0111] The loading module 71 is used to control the hydraulic cylinder to apply pressure to the bogie when a preset detection state is met between the bogie and the hydraulic cylinder;

[0112] The loading distance detection module 72 is used to control the distance measuring device to detect the loading distance between the detection end and the surface to be measured when the actual pressure applied by the hydraulic cylinder to the bogie reaches the preset pressure.

[0113] The free distance detection module 73 is used to control the distance measuring device to detect the free distance between the detection end and the surface to be measured when the actual position of the hydraulic cylinder rises to the preset origin position.

[0114] The actual height determination module 74 is used to determine the actual height between the surface to be measured and the track surface based on the loading distance, free distance, preset standard height and preset zero point distance.

[0115] Furthermore, the device also includes a module for determining the actual loaded height and the actual free height, used for:

[0116] The actual loading height between the surface to be tested and the track surface is determined based on the loading distance, the preset standard height, and the preset zero point distance.

[0117] The actual free height between the surface to be measured and the track surface is determined based on the free distance, the preset standard height, and the preset zero point distance; the actual height includes the actual loading height and the actual free height.

[0118] Furthermore, the device also includes a preset zero-point distance determination module, used for:

[0119] When the preset detection state is met between the standard part and the hydraulic cylinder, the distance measuring device is controlled to detect the preset zero-point distance between the detection end and the standard surface of the standard part.

[0120] Furthermore, the device also includes a standard component control module, used to: control the bottom surface of the standard component's foot to be parallel to the track surface before the preset detection state is met between the standard component and the hydraulic cylinder; and control the standard surface to be parallel to the track surface.

[0121] Furthermore, the device also includes a tilt detection module, used for:

[0122] Determine whether the surface to be measured is tilted based on the loaded distance or free distance detected by at least three ranging devices installed on the same plane.

[0123] Based on the same inventive concept, embodiments of this application also provide, as follows: Figure 8 An electronic device shown includes:

[0124] Processor 81;

[0125] Memory 82 is used to store executable instructions of processor 81;

[0126] The processor 81 is configured to execute a bogie preload detection method as described above.

[0127] Based on the same inventive concept, embodiments of this application also provide a non-transitory computer-readable storage medium, which, when the instructions in the storage medium are executed by the processor 81 of an electronic device, enables the electronic device to perform a bogie preload detection method as described above.

[0128] Since the electronic device described in this embodiment is an electronic device used to implement the information processing method in the embodiments of this application, those skilled in the art can understand the specific implementation methods and various variations of the electronic device in this embodiment based on the information processing method described in the embodiments of this application. Therefore, how the electronic device implements the method in the embodiments of this application will not be described in detail here. Any electronic device used by those skilled in the art to implement the information processing method in the embodiments of this application falls within the scope of protection of this application.

[0129] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0130] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0131] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0132] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1The steps of the function specified in one or more boxes.

[0133] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention.

[0134] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A method for detecting the preload of a bogie, characterized in that, An application is made in a preload detection system, the preload detection system including a hydraulic cylinder and a distance measuring device; the distance measuring device is mounted on the base of the hydraulic cylinder, the detection end of the distance measuring device is opposite to the test surface of the bogie to be tested, the bogie is placed on a track, and the method includes: When a preset detection state is met between the bogie and the hydraulic cylinder, the hydraulic cylinder is controlled to apply pressure to the bogie; When the actual pressure applied by the hydraulic cylinder to the bogie reaches the preset pressure, the ranging device is controlled to detect the loading distance between the detection end and the surface to be measured. When the hydraulic cylinder rises to the preset origin position, the ranging device is controlled to detect the free distance between the detection end and the surface to be measured. Based on the loading distance, the free distance, the preset standard height, and the preset zero-point distance, the actual height between the surface to be measured and the track surface is determined, including: The actual loading height between the surface to be tested and the track surface is determined based on the loading distance, the preset standard height, and the preset zero point distance. The actual free height between the surface to be measured and the track surface is determined based on the free distance, the preset standard height, and the preset zero point distance; the actual height includes the actual loading height and the actual free height. The ranging device includes a center plate ranging device, and the surface to be measured includes the center plate surface to be measured of the center plate component of the bogie; The loading distance includes the loading distance between the heart plate detection end of the heart plate ranging device and the heart plate surface to be measured. The free distance includes the free distance between the cardiac disc detection end and the surface of the cardiac disc to be tested.

2. The bogie preload detection method as described in claim 1, characterized in that, The preset zero-point distance is obtained according to the following steps: When the preset detection state is met between the standard part and the hydraulic cylinder, the ranging device is controlled to detect the preset zero-point distance between the detection end and the standard surface of the standard part.

3. The bogie preload detection method as described in claim 2, characterized in that, Before the preset detection state is met between the standard component and the hydraulic cylinder, the process also includes: The base surface of the standard component is kept parallel to the track surface. Control the standard surface to be parallel to the track surface.

4. The bogie preload detection method as described in claim 1, characterized in that, Before determining the actual height between the surface to be measured and the track surface based on the loading distance, the free distance, the preset standard height, and the preset zero-point distance, the method further includes: Based on the loaded distance or the free distance detected by at least three ranging devices installed on the same plane, it is determined whether the surface to be measured is in an inclined state.

5. The bogie preload detection method as described in claim 1, characterized in that, The ranging device includes a side bearing ranging device, and the surface to be measured includes the side bearing surface to be measured of the side bearing component of the bogie; The loading distance includes the load distance between the side bearing detection end of the side bearing ranging device and the side bearing surface to be measured. The free distance includes the free distance between the side bearing detection end and the side bearing surface to be tested.

6. A pre-compression detection system, characterized in that, The system includes: Hydraulic cylinder; A ranging device is mounted on the base of the hydraulic cylinder, and the detection end of the ranging device is opposite to the test surface of the bogie to be measured. A controller is connected to both the hydraulic cylinder and the ranging device, and the controller is used to execute a bogie preload detection method according to any one of claims 1-5.

7. The pre-compression detection system as described in claim 6, characterized in that, The ranging device includes: The bogie center plate distance measuring device includes multiple such devices spaced apart on the same plane, with the detection end of each device facing the center plate surface of the bogie to be measured. Side bearing distance measuring devices include a right side bearing distance measuring device and a left side bearing distance measuring device. The right side bearing distance measuring device is disposed on one side of the base and faces the right side bearing surface to be measured of the bogie. The left side bearing distance measuring device is disposed on the other side of the base and faces the left side bearing surface to be measured of the bogie.

8. A preload detection device for bogies, characterized in that, An application is made in a preload detection system, the preload detection system including a hydraulic cylinder and a distance measuring device; the distance measuring device is mounted on the base of the hydraulic cylinder, the detection end of the distance measuring device is opposite to the test surface of the bogie to be tested, the bogie is placed on the track, and the device includes: The loading module is used to control the hydraulic cylinder to apply pressure to the bogie when a preset detection state is met between the bogie and the hydraulic cylinder; The loading distance detection module is used to control the distance measuring device to detect the loading distance between the detection end and the surface to be measured when the actual pressure applied by the hydraulic cylinder to the bogie reaches the preset pressure. The free distance detection module is used to control the ranging device to detect the free distance between the detection end and the surface to be measured when the actual position of the hydraulic cylinder rises to the preset origin position. The actual height determination module is used to determine the actual height between the surface to be measured and the track surface based on the loading distance, the free distance, the preset standard height, and the preset zero point distance. The actual height determination module is also used for: The actual loading height between the surface to be tested and the track surface is determined based on the loading distance, the preset standard height, and the preset zero point distance. The actual free height between the surface to be measured and the track surface is determined based on the free distance, the preset standard height, and the preset zero point distance; the actual height includes the actual loading height and the actual free height. The ranging device includes a center plate ranging device, and the surface to be measured includes the center plate surface to be measured of the center plate component of the bogie; The loading distance includes the loading distance between the heart plate detection end of the heart plate ranging device and the heart plate surface to be measured. The free distance includes the free distance between the cardiac disc detection end and the surface of the cardiac disc to be tested.

Images