Rail inspection beam random vibration measurement method, device, system, equipment and medium

Abstract

The invention discloses a rail inspection beam random vibration measurement method, device, system and equipment and a medium. The method comprises the following steps: establishing a model of a rail inspection beam; performing modal analysis on the model, and determining a power spectral density frequency range corresponding to a target detection point on the track detection beam; moving the articulated arms, and enabling the laser micrometer on at least one articulated arm to be aligned with the target detection point; inputting the power spectral density frequency range into a vibration table, and starting the vibration table to form random vibration; and collecting detection data of the laser micrometer, and obtaining the amplitude of the target detection point according to the detection data. The device comprises a portal frame; the vibration table is arranged in the portal frame and is used for randomly vibrating the track inspection beam; the first end of the first articulated arm and the first end of the second articulated arm are both mounted on the portal frame; and the second end of the first articulated arm and the second end of the second articulated arm are respectively and fixedly provided with a laser micrometer. And the random vibration measurement precision of the track inspection beam is high.

Description

Technical Field

[0001] The present invention belongs to the technical field of track geometric parameter detection, and in particular relates to a method, device, system, equipment and medium for measuring random vibration of a track inspection beam. Background Art

[0002] The geometric track inspection equipment is mainly used to quickly detect the geometric parameters of the track. Since it is installed at the bottom of the track train, the geometric track inspection equipment benchmark is often affected by the ups and downs of the track. It is necessary to perform dynamic measurement of random vibration on the geometric track inspection equipment to calibrate whether its related parameters meet the requirements. Since the length of the geometric track inspection equipment hoisting beam (hereinafter referred to as the track inspection beam) is about 1.2 meters, an inertial navigation device is installed in the center as the reference information, and laser measurement equipment is installed at both ends to measure the track geometric parameters. Therefore, the change in the center and both ends under random vibration greatly affects the measurement results of the geometric parameters. Therefore, random vibration tests are often performed at the center and both ends of the track inspection beam.

[0003] At present, random vibration measurement is mainly carried out by inputting power spectrum density with a frequency span of (5Hz to 150Hz), and using accelerometers or lasers to measure the deformation of the track inspection beam. However, for different parts of complex structures, the corresponding frequencies affected by vertical displacement changes are different.

[0004] Dynamic measurement of amplitude through accelerometer is not accurate, traceability is difficult, and the measurement range is limited, which restricts the measurement accuracy of dynamic measurement amplitude; laser measurement has the problem that the installed laser is easily affected by vibration, which is not conducive to the accurate measurement and traceability of key parameters corresponding to the amplitude.

[0005] Therefore, the measurement accuracy of random vibration of track inspection beams still needs to be improved. Summary of the invention

[0006] The object of the present invention is to provide a method, device, system, equipment and medium for measuring random vibration of a track inspection beam, so as to improve the measurement accuracy of random vibration of the track inspection beam.

[0007] A first aspect of the present invention discloses a method for measuring random vibration of a track inspection beam, comprising:

[0008] Build a model of the track inspection beam;

[0009] Performing modal analysis on the model to determine the power spectrum density frequency range corresponding to the target detection point on the track inspection beam;

[0010] Move the articulated arms so that at least one laser micrometer on the articulated arms is aligned with the target detection point;

[0011] Inputting the power spectrum density frequency range into the vibration table, and turning on the vibration table to generate random vibration;

[0012] The detection data of the laser micrometer is collected, and the amplitude of the target detection point is obtained according to the detection data.

[0013] In some embodiments, performing modal analysis on the model to determine the power spectrum density frequency range corresponding to the target detection point on the track inspection beam includes:

[0014] Performing modal analysis on the model to obtain vibration modes and natural frequencies of the track inspection beam;

[0015] Based on each order vibration mode and natural frequency, the power spectrum density frequency range corresponding to the target detection point is obtained.

[0016] In some embodiments, when the target detection point is the center of the track inspection beam, the power spectrum density frequency range includes 57 Hz to 70 Hz and 84 Hz to 150 Hz;

[0017] When the target detection point is outside the two ends of the track inspection beam, the power spectrum density frequency range includes 10Hz to 25Hz and 74Hz to 80Hz;

[0018] When the target detection point is the inner side of both ends of the track inspection beam, the power spectrum density frequency range includes 50 Hz to 55 Hz.

[0019] In some embodiments, two articulated arms are provided, and the moving articulated arms at least align the laser micrometer on one articulated arm with the target detection point, including:

[0020] Move the articulated arms so that the laser micrometer on one articulated arm is aligned with the target detection point, and the laser micrometer on the other articulated arm is aligned with the vibration table.

[0021] In some embodiments, two articulated arms are provided, and the moving articulated arms at least align the laser micrometer on one articulated arm with the target detection point, including:

[0022] Move the articulated arms so that the laser micrometer on one articulated arm is aligned with the target detection point, and the laser micrometer on the other articulated arm is aligned with another detection point on the track inspection beam.

[0023] A second aspect of the present invention discloses a random vibration measuring device for a track inspection beam, comprising:

[0024] Gantry;

[0025] A vibration table placed in the gantry, the vibration table is used to randomly vibrate the track inspection beam according to an input power spectrum density frequency range, and the track inspection beam is installed on the vibration table;

[0026] a first articulated arm and a second articulated arm, wherein a first end of the first articulated arm and a first end of the second articulated arm are both mounted on the gantry;

[0027] A laser micrometer is fixed to the second end of the first joint arm and the second end of the second joint arm.

[0028] In some embodiments, the gantry includes two opposing columns, and a vibration isolation structure is provided at the bottom of the columns.

[0029] A third aspect of the present invention discloses a track inspection beam random vibration measurement system, comprising:

[0030] Model building module, used to build the model of track inspection beam;

[0031] A frequency range module, used to perform modal analysis on the model and determine the power spectrum density frequency range corresponding to the target detection point on the track inspection beam;

[0032] A control module is used to move the articulated arm so that at least one laser micrometer on the articulated arm is aligned with the target detection point; the power spectrum density frequency range is input into the vibration table, and the vibration table is turned on to form random vibration;

[0033] The acquisition module is used to acquire detection data of the laser micrometer and obtain the amplitude of the target detection point according to the detection data.

[0034] The fourth aspect of the present invention discloses an electronic device, comprising a memory storing executable program code and a processor coupled to the memory; the processor calls the executable program code stored in the memory to execute any one of the above-mentioned track inspection beam random vibration measurement methods.

[0035] A fifth aspect of the present invention discloses a computer-readable storage medium storing a computer program, wherein the computer program enables a computer to execute any one of the above-mentioned methods for measuring random vibration of a track inspection beam.

[0036] The beneficial effect of the present invention is that the measurement method determines the power spectrum density frequency range required for the target detection point by performing modal analysis on the model of the track inspection beam, and can realize the measurement of different parts of the track inspection beam structure using different frequencies, so that the traceability of the value is guaranteed and the measurement accuracy of random vibration is improved. The measuring device can realize random vibration of different frequency ranges for different detection points by controlling the power spectrum density frequency range of the input vibration table, and the measurement position can be changed at any time. The measurement results meet the traceability requirements and the traceability is convenient; two points can be measured synchronously, and different frequencies can be set for acquisition, so as to obtain the amplitude change under random vibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The accompanying drawings herein show specific examples of the technical solutions described in the present invention, and together with the specific implementation methods, constitute a part of the specification, and are used to explain the technical solutions, principles and effects of the present invention.

[0038] Unless otherwise specified or defined, the same reference numerals in different drawings represent the same or similar technical features, and the same or similar technical features may also be represented by different reference numerals.

[0039] Figure 1 is a schematic diagram of a random vibration measuring device for a track inspection beam according to an embodiment of the present invention;

[0040] Figure 2 is a flow chart of a method for measuring random vibration of a track inspection beam according to an embodiment of the present invention;

[0041] Figure 3 yes Figure 2 Flowchart of step S200 in the embodiment;

[0042] Figure 4 is a structural schematic diagram of a track inspection beam random vibration measurement system according to an embodiment of the present invention;

[0043] Figure 5 It is a structural schematic diagram of an electronic device according to an embodiment of the present invention.

[0044] Description of reference numerals:

[0045] 1. Vibration table, 2. First articulated arm, 3. First laser micrometer, 4. Second articulated arm, 5. Second laser micrometer, 6. Track inspection beam, 7. Gantry, 8. Vibration isolation airbag. DETAILED DESCRIPTION

[0046] Unless otherwise specified or defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art. In the case of combining the technical solution of the present invention with realistic scenarios, all technical and scientific terms used herein may also have meanings corresponding to the purpose of implementing the technical solution of the present invention. The "first, second..." used herein is only used to distinguish the names and does not represent a specific quantity or order. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0047] It should be noted that when a component is considered to be "fixed to" another component, it can be directly fixed to the other component or there can be a central component; when an component is considered to be "connected to" another component, it can be directly connected to the other component or there can be a central component at the same time; when an component is considered to be "installed on" another component, it can be directly installed on the other component or there can be a central component at the same time. When an component is considered to be "set on" another component, it can be directly set on the other component or there can be a central component at the same time.

[0048] Unless otherwise specified or defined, the "said" and "the" used in this document refer to the technical features or technical contents mentioned or described before the corresponding position, and the technical features or technical contents may be the same as or similar to the technical features or technical contents mentioned therein. In addition, the terms "including" and "having" and any variations thereof used in this document are intended to cover non-exclusive inclusions. 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 may optionally include steps or units that are not listed, or may optionally include other steps or units inherent to these processes, methods, products or devices.

[0049] In view of the problem that the existing random vibration measurement methods and measurement devices have insufficient measurement accuracy, the embodiment of the present invention first provides a random vibration measurement device for a track inspection beam, such as Figure 1 As shown, it includes a gantry 7, a vibration table 1, a first joint arm 2 and a second joint arm 4. The vibration table 1 is installed in the gantry 7 and is used to randomly vibrate the track inspection beam 6 installed on the vibration table 7 according to the input power spectrum density frequency range; two joint arms (2, 4) are installed on the top of the gantry 7, and the free ends of the two joint arms are respectively fixed with a first laser micrometer 3 and a second laser micrometer 5 for collecting amplitude data, and the joints of the two joint arms are both universal ball structures, which can adjust the orientation and angle of the laser micrometer (3, 5) according to different measurement requirements. The measurement accuracy is high and the measurement range is large.

[0050] The gantry 7 includes two opposite columns, and a vibration isolation airbag 8 is arranged at the bottom of the column to form a vibration isolation structure, which can reduce the influence of the vibration table 1 on the disturbance value of the corresponding point of the geometric track inspection equipment when detecting it.

[0051] When in use, by controlling the frequency range of the power spectrum density of the input vibration table, random vibrations in different frequency ranges can be achieved for different detection points; by collecting the amplitude of the detection point with a laser micrometer, the disturbance value of the geometric track inspection equipment can be calculated, and, through two articulated arms, the relative change between the vibration table and the track inspection beam or the relative change between two detection points can be measured, and the above relative changes can also be collected in different frequency ranges. It can expand the measurement range, improve the measurement accuracy, and is conducive to the testing and optimization of key parameters of track geometry detection equipment.

[0052] Therefore, the random vibration measuring device of the track inspection beam of this embodiment can realize random vibration in different frequency ranges, the measurement position can be changed at any time, the measurement results meet the traceability requirements, and traceability is convenient; two points can be measured synchronously, and different frequencies can be set for collection, so as to obtain the amplitude changes under random vibration.

[0053] The embodiment of the present invention also provides a method for measuring the random vibration of a track inspection beam, which determines the power spectrum density frequency range required for the target detection point by performing modal analysis on the model of the track inspection beam, and realizes that different parts of the track inspection beam structure are measured at different frequencies, thereby improving the accuracy of random vibration measurement. The method can be implemented by computer programming. The executor of the method can be an electronic device such as a computer, a laptop computer, a tablet computer, or a track inspection beam random vibration measurement device embedded in an electronic device, and the present invention is not limited to this. In order to facilitate the understanding of the present invention, the specific embodiments of the present invention will be described in more detail below with reference to the drawings in the specification.

[0054] like Figure 2 As shown, the method comprises the following steps:

[0055] Step S100: establishing a model of a track inspection beam;

[0056] Use finite element analysis software such as ANSYS, Abaqus, and COMSOL to draw the geometry of the rail inspection beam according to its actual size and shape, and specify appropriate material properties for the rail inspection beam, including elastic modulus, density, Poisson's ratio, etc. Divide the geometric model of the rail inspection beam into finite element grids, and determine the support conditions of the rail inspection beam, such as fixed, simply supported, etc. Complete the construction of the rail inspection beam model.

[0057] In this embodiment, the beam is simplified, the mass is concentrated on thirteen mass points, the mass points are connected by beams, and the vertical deformation is considered. The established can be expressed as:

[0058]

[0059] Among them, k is the correlation between the stiffness, modulus, inclination angle, Poisson's ratio and length of each beam. is the vertical displacement, is the acceleration in the vertical direction; m is the mass; based on the above track inspection beam model, finite element software such as ANSYS can be used to gradually increase mass points.

[0060] Step S200: performing modal analysis on the model to determine the power spectrum density frequency range corresponding to the target detection point on the track inspection beam;

[0061] Among them, power spectrum density is a function that describes the power distribution of a signal in the frequency domain, and is usually used to analyze the frequency components of random vibration signals. It represents the power of a signal within a unit frequency bandwidth. The frequency range of power spectrum density is determined by the characteristics of the input signal and may contain multiple frequency components, which is usually related to the characteristics of the excitation source.

[0062] Perform modal analysis on the established track inspection beam model, first obtain its natural frequency and mode shape, where the natural frequency is the frequency of the structure's natural vibration without external excitation. Each structure has one or more natural frequencies, which are usually related to its mass and stiffness characteristics. The natural frequency is fixed and depends on the geometry, material properties and boundary conditions of the structure. The natural frequency and mode shape can usually be calculated using finite element analysis software. Then, based on the natural frequency and mode shape, determine the power spectral density frequency range corresponding to the target inspection point.

[0063] In some embodiments, Figure 3 As shown, the specific steps include:

[0064] Step S210: performing modal analysis on the model to obtain vibration modes and natural frequencies of each order of the track inspection beam;

[0065] Select modal analysis in the finite element analysis software, select the first few frequencies and vibration modes for calculation, and obtain the natural frequency and corresponding vibration mode of the track inspection beam.

[0066] Through modal analysis and calculation, this embodiment obtains the vibration modes and natural frequencies of the track inspection beam as follows:

[0067] Mode shape 1 2 3 4 5 6 Natural frequency 11.353 12.193 22.673 23.863 52.475 52.596 Mode shape 7 8 9 10 11 12 Natural frequency 57.98 69.415 74.253 78.066 84.279 149.49

[0068] Among them, the first four vibration modes (1st to 4th vibration modes) and the 9th and 10th vibration modes mainly correspond to the displacement changes of the outer sensors at both ends of the track inspection beam, the 5th and 6th vibration modes mainly correspond to the displacement changes of the inner sensors at both ends of the track inspection beam, and the 7th, 8th, 11th and 12th vibration modes correspond to the displacement changes of the central inertial navigation unit.

[0069] Step S220: based on each vibration mode and natural frequency, obtaining the power spectrum density frequency range corresponding to the target detection point;

[0070] Since the first four vibration modes, the 9th vibration mode and the 10th vibration mode mainly correspond to the changes in the sensor displacement on the outer sides of the two ends, when the target detection point is the outer sides of the two ends of the track inspection beam, the changes mainly come from the two sections of 10Hz~25Hz and 74Hz~80Hz. Therefore, the power spectrum density frequency range of the target detection point correspondingly includes 10Hz~25Hz and 74Hz~80Hz.

[0071] Since the 5th-order vibration mode and the 6th-order vibration mode mainly correspond to the displacement changes of the inner measuring sensors at both ends, when the target detection point is the inner side of the two ends of the track inspection beam, the changes mainly come from 50Hz~55Hz. Therefore, the power spectrum density frequency range of the target detection point correspondingly includes 50Hz~55Hz.

[0072] Since the 7th, 8th, 11th and 12th vibration modes are the displacement changes of the central inertial navigation unit, when the target detection point is the center of the track inspection beam, the changes mainly come from the two sections of 57Hz~70Hz and 84Hz~150Hz. Therefore, the power spectrum density frequency range of the target detection point includes 57Hz~70Hz and 84Hz~150Hz.

[0073] The natural frequency and vibration mode of the track inspection beam under inspection are obtained through modal analysis, and the deflection at the center inertial navigation is detected at 57Hz~70Hz and 84Hz~150Hz, the deflection at the outer sensors at both ends is detected at 10Hz~25Hz and 74Hz~80Hz, and the deflection at the inner sensors at both ends is detected at 50Hz~55Hz, which is more suitable than directly inputting random vibration in the range of 5Hz~150Hz. It can improve the test accuracy and efficiency, and is conducive to the acquisition of relevant parameters of track geometry measurement random vibration test.

[0074] Step S300: moving the articulated arms to align at least one laser micrometer on the articulated arms with the target detection point;

[0075] Step S400: inputting the power spectrum density frequency range into the vibration table, and turning on the vibration table to generate random vibration;

[0076] Step S500: Collect detection data from the laser micrometer, and obtain the amplitude of the target detection point according to the detection data.

[0077] When the vibration table vibrates at a random frequency within the frequency range of the power spectrum density, the vibration table drives the track inspection beam fixed on it to vibrate. After the laser micrometer is aligned with the target detection point, the detection data of the laser micrometer is collected, and the detection data can be analyzed to obtain the amplitude of the target detection point. And the deflection analysis can be further performed based on the amplitude data. It should be noted that the method of analyzing the detection data of the laser micrometer to obtain the amplitude and deflection is a conventional technical means in this field and will not be repeated here.

[0078] The measuring device used in this embodiment is provided with two articulated arms, and accordingly, there are two laser micrometers. When the articulated arms move, the laser micrometer on one articulated arm is aligned with the target detection point, and the laser micrometer on the other articulated arm is aligned with the vibration table. The laser micrometer is used to vertically measure the target detection point of the track inspection beam and the vibration table, and the vibration amplitudes of the two can be measured simultaneously to obtain the relative change amount, and the disturbance value of the geometric track inspection equipment is calculated based on the relative change amount.

[0079] The specific measurement process is as follows: first install the track inspection beam on the vibration table, adjust the two joint arms, align one laser micrometer with the center point and the other with the standard vibration table, lock the joint screws on the joint arms, and inflate the vibration isolation airbag of the gantry. Turn on the vibration table, and form standard random vibrations of 57Hz~70Hz and 84Hz~150Hz power spectrum density through the vibration table, and record the vibration amplitude within a certain period of time through the laser micrometer; calculate the change of the disturbance change at the center point of the track inspection beam over time, and obtain the range of the change. Similarly, adjust the two articulated arms so that one laser micrometer is aimed at one of the outer sensors at both ends of the track inspection beam, and the other is aimed at the standard vibration table. Lock the joint screws on the articulated arms, inflate the vibration isolation airbags of the gantry, turn on the vibration table, and use the vibration table to form standard random vibrations with power spectrum densities of 10Hz to 25Hz and 74Hz to 80Hz, respectively. Use the laser micrometer to record the vibration amplitude within a certain period of time. For the inner sensors at both ends, use the vibration table to form standard random vibrations with power spectrum densities of 50Hz to 55Hz, and use the laser micrometer to record the vibration amplitude within a certain period of time. Complete the measurement of all inspection points on the track inspection beam.

[0080] In one example, when the articulated arm moves, the laser micrometer on one articulated arm is aligned with the target detection point, and the laser micrometer on the other articulated arm is aligned with another detection point on the track inspection beam. The relative change of the two detection points can be measured by dual lasers, and the disturbance value of the geometric track inspection equipment can be calculated based on the relative change.

[0081] In one example, the vibration table may be vibrated successively at different frequencies within the frequency range of the power spectrum density, relative changes at different frequencies may be collected, and the disturbance value of the geometric track inspection equipment may be calculated based on the relative changes.

[0082] In summary, the measurement method of this embodiment measures the vibration amplitude of the object surface with high precision through non-contact, and different parts of the track inspection beam structure are measured at different frequencies, so the traceability of the measurement value is guaranteed, and the measurement accuracy of random vibration is improved. The measurement device used for dynamic measurement of geometric track inspection equipment has a reasonable and simple structure, is easy to operate, and has clear results.

[0083] like Figure 4As shown, based on the above-mentioned track inspection beam random vibration measurement method, the embodiment of the present invention further discloses a track inspection beam random vibration measurement system, including:

[0084] A model building module 600 is used to build a model of the track inspection beam;

[0085] A frequency range module 610 is used to perform modal analysis on the model to determine a power spectrum density frequency range corresponding to a target detection point on the track inspection beam;

[0086] The control module 620 is used to move the articulated arm to align the laser micrometer on at least one articulated arm with the target detection point; input the power spectrum density frequency range into the vibration table, and turn on the vibration table to generate random vibration;

[0087] The acquisition module 630 is used to acquire detection data of the laser micrometer and obtain the amplitude of the target detection point according to the detection data.

[0088] In some embodiments, performing modal analysis on the model to determine the power spectrum density frequency range corresponding to the target detection point on the track inspection beam includes:

[0089] Performing modal analysis on the model to obtain vibration modes and natural frequencies of the track inspection beam;

[0090] Based on each order vibration mode and natural frequency, the power spectrum density frequency range corresponding to the target detection point is obtained.

[0091] In some embodiments, when the target detection point is the center of the track inspection beam, the power spectrum density frequency range includes 57 Hz to 70 Hz and 84 Hz to 150 Hz;

[0092] When the target detection point is outside the two ends of the track inspection beam, the power spectrum density frequency range includes 10Hz to 25Hz and 74Hz to 80Hz;

[0093] When the target detection point is the inner side of both ends of the track inspection beam, the power spectrum density frequency range includes 50 Hz to 55 Hz.

[0094] In some embodiments, two articulated arms are provided, and the articulated arms are moved so that the laser micrometer on one articulated arm is aligned with the target detection point, and the laser micrometer on the other articulated arm is aligned with the vibration table.

[0095] In some embodiments, two articulated arms are provided, and the articulated arms are moved so that the laser micrometer on one articulated arm is aligned with the target detection point, and the laser micrometer on the other articulated arm is aligned with another detection point on the track inspection beam.

[0096] like Figure 5As shown, an embodiment of the present invention further discloses an electronic device, comprising a memory 401 storing executable program code and a processor 402 coupled to the memory 401; wherein the processor 402 calls the executable program code stored in the memory 401 to execute the random vibration measurement method of the track inspection beam described in the above embodiments.

[0097] An embodiment of the present invention further discloses a computer-readable storage medium storing a computer program, wherein the computer program enables a computer to execute the random vibration measurement method of a track inspection beam described in the above embodiments.

[0098] The purpose of the above embodiments is to exemplarily reproduce and deduce the technical solution of the present invention, and to fully describe the technical solution, purpose and effect of the present invention. Its purpose is to make the public understand the disclosed content of the present invention more thoroughly and comprehensively, and it does not limit the scope of protection of the present invention.

[0099] The above embodiments are not exhaustive enumerations of the present invention, and there may be multiple other implementations not listed. Any replacement and improvement made without violating the concept of the present invention shall fall within the protection scope of the present invention.

Claims

1. A method for measuring random vibration of a track inspection beam, characterized in that: include: Build a model of the track inspection beam; Performing modal analysis on the model to determine the power spectrum density frequency range corresponding to the target detection point on the track inspection beam; Move the articulated arms so that at least one laser micrometer on the articulated arms is aligned with the target detection point; Inputting the power spectrum density frequency range into the vibration table, and turning on the vibration table to generate random vibration; The detection data of the laser micrometer is collected, and the amplitude of the target detection point is obtained according to the detection data.

2. The method for measuring random vibration of a track inspection beam according to claim 1, characterized in that: The modal analysis of the model is performed to determine the power spectrum density frequency range corresponding to the target detection point on the track inspection beam, including: Performing modal analysis on the model to obtain vibration modes and natural frequencies of the track inspection beam; Based on each order vibration mode and natural frequency, the power spectrum density frequency range corresponding to the target detection point is obtained.

3. The method for measuring random vibration of a track inspection beam according to claim 1, characterized in that: When the target detection point is the center of the track inspection beam, the power spectrum density frequency range includes 57 Hz to 70 Hz and 84 Hz to 150 Hz; When the target detection point is outside the two ends of the track inspection beam, the power spectrum density frequency range includes 10Hz to 25Hz and 74Hz to 80Hz; When the target detection point is the inner side of both ends of the track inspection beam, the power spectrum density frequency range includes 50 Hz to 55 Hz.

4. The method for measuring random vibration of a track inspection beam according to claim 1, characterized in that: Two articulated arms are provided, and the moving articulated arms at least align the laser micrometer on one articulated arm with the target detection point, including: Move the articulated arms so that the laser micrometer on one articulated arm is aligned with the target detection point, and the laser micrometer on the other articulated arm is aligned with the vibration table.

5. The method for measuring random vibration of a track inspection beam according to claim 1, characterized in that: Two articulated arms are provided, and the moving articulated arms at least align the laser micrometer on one articulated arm with the target detection point, including: Move the articulated arms so that the laser micrometer on one articulated arm is aligned with the target detection point, and the laser micrometer on the other articulated arm is aligned with another detection point on the track inspection beam.

6. A random vibration measuring device for a track inspection beam, characterized in that: include: Gantry; A vibration table placed in the gantry, the vibration table is used to randomly vibrate the track inspection beam according to an input power spectrum density frequency range, and the track inspection beam is installed on the vibration table; a first articulated arm and a second articulated arm, wherein a first end of the first articulated arm and a first end of the second articulated arm are both mounted on the gantry; A laser micrometer is fixed to the second end of the first joint arm and the second end of the second joint arm.

7. The random vibration measuring device for track inspection beam according to claim 6, characterized in that: The gantry comprises two opposite columns, and a vibration isolation structure is provided at the bottom of the columns.

8. A track inspection beam random vibration measurement system, characterized in that: include: Model building module, used to build the model of track inspection beam; A frequency range module, used to perform modal analysis on the model and determine the power spectrum density frequency range corresponding to the target detection point on the track inspection beam; A control module is used to move the articulated arm so that at least one laser micrometer on the articulated arm is aligned with the target detection point; input the power spectrum density frequency range into the vibration table, and turn on the vibration table to form random vibration; The acquisition module is used to acquire detection data of the laser micrometer and obtain the amplitude of the target detection point according to the detection data.

9. An electronic device, characterized in that: It comprises a memory storing executable program code and a processor coupled to the memory; the processor calls the executable program code stored in the memory to execute the random vibration measurement method of the track inspection beam according to any one of claims 1 to 5.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, wherein the computer program enables a computer to execute the method for measuring random vibration of a track inspection beam according to any one of claims 1 to 5.

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