A method and device for testing the restitution coefficient of damped particles, computer program product

Abstract

The application discloses a kind of damping particle recovery coefficient test method and device, computer program product, the test device includes support, damping particle delivery component, detection unit and control unit;The damping particle delivery component is set on the support, the damping particle delivery component has drop port, for the damping particle to be measured passes through and free fall;The support has rebounding surface, and the rebounding surface is located below the drop port;The detection unit is set on the support below the drop port, for detecting the moment when the damping particle to be measured collides with the rebounding surface;The control unit is used to obtain the recovery coefficient of damping particle according to the moment when the free falling damping particle collides with the rebounding surface.Application of this scheme can effectively simplify the test process and save test cost on the basis of effectively improving test accuracy.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of material testing, in particular to a damping particle restitution coefficient testing method and device, and a computer program product. BACKGROUND

[0002] The damping particle restitution coefficient is a physical quantity representing the energy dissipation effect caused by the relative motion of the damping particles in the collision process, and the square root of the ratio of the rebound height of the damping particles to the free falling height is the restitution coefficient. Accurately obtaining the damping particle restitution coefficient is an important indicator in studying the dynamic behavior of the damping particles.

[0003] Therefore, it is urgent to optimize the testing scheme of the damping particle restitution coefficient to meet the use needs of different application scenarios. SUMMARY

[0004] To solve the above technical problems, the present application provides a damping particle restitution coefficient testing method and device, and a computer program product, which can effectively simplify the testing process and save testing costs on the basis of effectively improving the testing accuracy.

[0005] The present application provides a damping particle restitution coefficient testing device, which comprises a support, a damping particle dropping assembly, a detection unit and a control unit. The damping particle dropping assembly is arranged on the support, and has a dropping port for the to-be-tested damping particles to pass through and freely fall. The support has a rebounding surface, and the rebounding surface is located below the dropping port. The detection unit is arranged on the support below the dropping port and is used to detect the moment when the to-be-tested damping particles collide with the rebounding surface. The control unit is used to obtain the damping particle restitution coefficient according to the moment when the freely falling damping particles collide with the rebounding surface.

[0006] Optionally, the detection unit is a vibration acceleration sensor, and the control unit is used to obtain the damping particle restitution coefficient according to the first moment when the freely falling damping particles collide with the rebounding surface for the first time and the second moment when the damping particles collide with the rebounding surface for the second time.

[0007] Optionally, the dropping port is located at a position 0.5m-1m above the rebounding surface.

[0008] Optionally, the support comprises a support rod, and the support rod is arranged to extend in the vertical direction. The damping particle dropping assembly is fixedly arranged on the support rod, or the arrangement position of the damping particle dropping assembly relative to the support rod is adjustable.

[0009] Optionally, the support further comprises a plate portion, the rebounding surface is located on an upper surface of the plate portion, and the detection unit is arranged on the upper surface of the plate portion.

[0010] Optionally, the plate portion is made of the same material as a damper shell of the damping particles to be tested; and / or, the plate portion is a rectangular plate with a plate size greater than 500mm*500mm; and / or, the plate portion is a plate with a thickness not less than 10mm.

[0011] Optionally, the support further comprises a base and a support for fixed arrangement, the support rod is fixedly arranged on the base, and the plate portion is fixedly arranged on the support.

[0012] Optionally, the damping particle feeding assembly comprises a damping particle containing portion and a shielding portion, the damping particle containing portion is fixedly arranged, a containing cavity for containing the damping particles to be tested is arranged on the damping particle containing portion, and a bottom of the containing cavity is provided with the feeding opening; the shielding portion is located below the damping particle containing portion and can be switched between a shielding state and a feeding state relative to the damping particle containing portion; when the shielding portion is in the shielding state, the feeding opening of the damping particle containing portion is shielded, and when the shielding portion is in the feeding state, the shielding of the feeding opening is released.

[0013] Optionally, the damping particle feeding assembly further comprises a connecting portion and is arranged on the support rod through the connecting portion, and the damping particle containing portion is arranged on the connecting portion.

[0014] Optionally, the shielding portion is rotationally arranged on the connecting portion, or is rotationally arranged on the support rod to rotationally switch between the shielding state and the feeding state.

[0015] Optionally, the shielding portion is slidingly arranged at the bottom of the damping particle containing portion to move and switch between the shielding state and the feeding state.

[0016] The application further provides a damping particle recovery coefficient testing method based on the testing device.

[0017] The damping particles to be tested are fed.

[0018] The time difference Δt between two adjacent times of collision of the damping particles with the rebounding surface is obtained, and the rebounding height h of the damping particles is calculated according to the time difference Δt and formula (1). i :

[0019]

[0020] In formula (1), h represents the rebounding height of the damping particles, g represents the acceleration of gravity, and Δt represents the time difference between two adjacent times of collision of the damping particles with the rebounding surface.

[0021] g--gravity acceleration, taking 9.8 m / s 2 ;

[0022] h i --the rebound height of the damping particle after the i-th collision, i being a natural number;

[0023] According to the rebound height h i of the damping particle and the rebound height h i+1 , the collision restitution coefficient e of the damping particle is calculated by formula (2);

[0024]

[0025] In formula (2):

[0026] e--the restitution coefficient of the i-th collision of the damping particle.

[0027] Optionally, after the damping particle to be tested is dropped, the restitution coefficients of multiple collisions are obtained in the process of continuous collisions between the damping particle and the rebound surface, and the first arithmetic mean of the restitution coefficients of the multiple collisions is taken as the restitution coefficient of the damping particle.

[0028] Optionally, the restitution coefficients of multiple collisions are obtained by excluding the first collision between the damping particle and the rebound surface and the collisions with a time difference Δt less than 10 -3 s between adjacent two collisions.

[0029] Optionally, the dropping of the damping particle to be tested comprises respectively dropping multiple damping particles to be tested of the same material and the same size, and the second arithmetic mean of the restitution coefficients of the damping particles is taken as the restitution coefficient of the damping particle.

[0030] The application further provides a computer program product comprising a computer program, which, when executed by a processor, implements the steps of the damping particle restitution coefficient testing method as described above.

[0031] Compared with the prior art, the damping particle recovery coefficient testing device has the advantages that: the damping particle feeding assembly of the testing device is arranged on the support, and is used for feeding the damping particles to be tested; the support has the rebounding action surface, and the rebounding action surface is located below the feeding port of the damping particle feeding assembly; the detection unit arranged on the support below the feeding port is used for detecting the moment when the damping particles to be tested collide with the rebounding action surface; and the control unit is used for obtaining the damping particle recovery coefficient according to the moment when the freely falling damping particles collide with the rebounding action surface. In this way, compared with the relatively complex measuring equipment such as a high-speed camera and an ultrasonic shot blasting device, the height after rebounding is obtained by using the detection unit to measure the collision moment, so that the testing process can be effectively simplified, and higher convenience and real-time performance are achieved.

[0032] In addition, in specific implementation, the detection unit can be a vibration acceleration sensor, and the control unit is used for obtaining the damping particle recovery coefficient according to the first moment when the freely falling damping particles collide with the rebounding action surface for the first time and the second moment when the damping particles collide with the rebounding action surface for the second time. In this way, the sensor has a lower price than the high-speed camera, so that the testing cost can be effectively saved; meanwhile, the accuracy of the collision moment recorded by the sensor is controllable, so that the error possibly caused by analyzing the video data can be avoided, the testing accuracy requirement is ensured, and the demand of different engineering application scenarios is met. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 A structural schematic diagram of a damping particle recovery coefficient testing device provided by an embodiment of the present application;

[0034] Figure 2 A dynamic cooperation relationship schematic diagram of a shielding part provided by an embodiment of the present application;

[0035] Figure 3 Another dynamic cooperation relationship schematic diagram of a shielding part provided by an embodiment of the present application;

[0036] Figure 4 A block diagram of a damping particle recovery coefficient testing method provided by an embodiment of the present application;

[0037] Figure 5 A process schematic diagram of damping particles colliding with the rebounding action surface continuously provided by an embodiment of the present application.

[0038] In the drawings:

[0039] The bracket 10, the first bracket 11, the base 111, the support rod 112, the second bracket 12, the plate part 121, the support 122, the rebounding surface 1211, the damping particle throwing assembly 20, the damping particle containing part 21, the containing cavity 211, the throwing opening 212, the shielding part 22, the connecting part 23, the detection unit 30, the control unit 40, and the damping particle 50. DETAILED DESCRIPTION

[0040] In order to make the technical personnel in the art better understand the technical solutions of the present application, the present application will be further described in detail below in combination with the drawings and specific embodiments.

[0041] In the implementation of the related absorption vibration capability technology, damping particles are widely used, such as but not limited to damping particle dampers with damping particles built into the damper housing. Among them, the damping particle recovery coefficient is a physical quantity representing the energy dissipation effect caused by the relative motion of the damping particles in the collision process. In the study of the dynamic behavior of damping particles, the accurate damping particle recovery coefficient is an important technical index to ensure the needs of related research and engineering application scenarios, such as but not limited to the performance of the damping particle material to be tested in absorbing collision energy and vibration and noise reduction.

[0042] Based on this, the embodiment of the present application provides a damping particle recovery coefficient testing device. Please refer to Figure 1 , which is a structural schematic diagram of a damping particle recovery coefficient testing device provided by the embodiment of the present application.

[0043] As Figure 1 shown, the damping particle recovery coefficient testing device includes a bracket 10, a damping particle throwing assembly 20, a detection unit 30, and a control unit 40.

[0044] Among them, the bracket 10 is a basic bearing and fixing structure, mainly used for installing the damping particle throwing assembly 20 and the detection unit 30, and providing a rebounding surface for the damping particles. In specific implementation, the bracket 10 can include two parts of the first bracket 11 and the second bracket 12. The damping particle throwing assembly 20 is arranged on the first bracket 11, the detection unit 30 is arranged on the second bracket 12, and the rebounding surface 1211 is located on the second bracket 12 and arranged opposite to the damping particle throwing assembly 20. In this way, the to-be-tested damping particle 50 released by the damping particle throwing assembly 20 can fall to the rebounding surface 1211 and rebound upward.

[0045] As shown in the figure, the first support 11 comprises a base 111 and a support rod 112 arranged on the base 111. The support rod 112 is vertically arranged so as to block the damping particle dropping assembly 20 at a dropping height. In this way, the free fall motion at a certain height can be simulated during the test, so as to test the rebounding characteristics or other related performances of the damping particles, and ensure that the damping particles 50 have a certain speed and energy when falling to the rebounding surface 1211.

[0046] In a specific implementation, the fixed position of the damping particle dropping assembly 20 on the support rod 112 can be adjusted as needed. For example, the damping particle dropping assembly 20 can be sleeved on the support rod 112 through the connecting part 23. The connecting part 23 can be in a sleeve shape and is fixed to the support rod 112 by a threaded fastener (not shown in the figure) laterally penetrating the sleeve-shaped connecting part 23. In this way, when the damping particle dropping height is adjusted according to actual test requirements, the threaded fastener can be loosened first, then the damping particle dropping assembly 20 is adjusted to a predetermined test height, and then the threaded fastener is tightened to achieve fixation.

[0047] It can be understood that the adjustment of the height position of the damping particle dropping assembly 20 relative to the support rod 112 can be achieved by other structural forms. Here, no longer be described.

[0048] In other possible implementation schemes, the damping particle dropping assembly 20 and the support rod 112 can also be fixedly connected. In other words, for a certain fixed position determined according to actual test scenarios, the damping particle dropping assembly 20 can be fixed on the support rod 112 through the connecting part 23, and the damping particle 50 can also have a certain speed and energy when falling to the rebounding surface 1211. The embodiments of the present application are not limited.

[0049] In the present embodiment, the second support 12 comprises a plate part 121 and a support base 122, the plate part 121 is fixedly arranged on the support base 122, that is, the plate part 121 and the support base 122 are rigidly connected to form the second support 12 with good overall rigidity. Correspondingly, the rebounding surface 1211 is located on the upper surface of the plate part 121. It has the characteristics of simple and reliable structure.

[0050] Exemplarily, the plate part 121 can be a rectangular plate with a size greater than 500mm*500mm. It should be understood that the shape and size of the plate part 121 can be determined according to the actual test scene, for example but not limited to circular or other shapes, as long as it can meet the functional needs of the falling and rebounding of the damping particles to be tested, it is within the scope of the present application.

[0051] Other examples, the plate 121 can be made of a thickness of 10 mm plate, or, also can be made of a thickness greater than 10 mm plate. In this way, the deformation of the plate can be prevented, to ensure the damping particles rigid collision. When the to be measured damping particles 50 and the rebounding surface 1211 of the plate 121 collide, the kinetic energy will be converted into deformation energy and heat energy. The embodiment of a certain thickness of the plate 121, so that more kinetic energy is converted into deformation energy rather than heat energy, thereby improving the rebound efficiency of the damping particles 50, improve the test accuracy. At the same time, the relatively thick plate can more effectively absorb and disperse deformation energy, reduce the energy loss after deformation, and thus promote the rebound of the damping particles 50.

[0052] In order to further improve the test accuracy, as preferred, the plate 121 can be made of the same material as the damper shell to maximize the approach to the actual engineering application scene of the damping particles to be measured.

[0053] Of course, in other possible implementations, the first support 11 and the second support 12 can be an integral structure (not shown in the figure) to improve the overall structural stiffness. Specifically, it can be selected according to the overall design of the product, and the embodiments of the application are not limited.

[0054] The detection unit 30 is used to detect the time when the damping particles fall and collide with the rebounding surface 1211. In specific implementation, the detection unit 30 can be a vibration acceleration sensor to accurately detect the specific time when the damping particles fall and collide with the rebounding surface 1211. When the collision occurs, the object will be suddenly affected by the acceleration change. Taking a piezoelectric vibration acceleration sensor as an example, the sensor arranged on the rebounding surface 1211 will perceive the acceleration change and generate a corresponding charge signal, and the charge signal generated by the electrode pair is collected and measured. On this basis, the occurrence of the collision time can be determined according to the change of the charge signal and timely recording and analysis.

[0055] The vibration acceleration sensor can be configured to have a range of not less than 50g (g is the unit of gravitational acceleration), and a frequency range of 2Hz-5000Hz to meet the needs of different test scenarios. It has good adaptability.

[0056] Other examples, the mass of the vibration acceleration sensor can be not more than 7g (grams), so as to avoid the influence of the heavy sensor on the detection accuracy while realizing the function of detecting the collision time.

[0057] In specific implementation, the vibration acceleration sensor sensor (30) can be arranged at the edge position of the plate 121. It should be understood that the detection unit 30 is arranged at the rebounding surface 1211 of the damping particles falling area.

[0058] The damping particle feeding assembly 20 comprises a damping particle accommodating part 21 and a shielding part 22. For example Figure 1 As shown in the drawings, the damping particle accommodating part 21 is fixedly arranged, and a cavity 211 for accommodating the damping particles 50 to be tested is arranged on the damping particle accommodating part 21. The bottom of the cavity 211 is provided with a feeding opening 212. Correspondingly, the shielding part 22 is arranged below the damping particle accommodating part 21 and can be switched between a shielding state and a feeding state relative to the damping particle accommodating part 21. When the shielding part 22 is in the shielding state as shown in the drawings, the feeding opening 212 of the damping particle accommodating part 21 is shielded, and the damping particles 50 to be tested are placed in the cavity 211 and are in a state of being ready to be fed. When the shielding part 22 is in the feeding state, the shielding of the feeding opening 212 is removed, and the damping particles 50 to be tested are free to fall.

[0059] In a specific implementation, the damping particle accommodating part 21 can be fixed on the connecting part 23 or directly fixed on the support rod 112.

[0060] In a specific implementation, the shielding part 22 can be rotatably arranged on the connecting part 23 or directly rotatably arranged on the support rod 112. Please refer to Figure 2 , which is a schematic diagram of a dynamic cooperation relationship of a shielding part provided in an embodiment of the present application. The shielding part 22 is rotatably arranged on the connecting part 23, as shown in Figure 2 , the left drawing in FIG. 6 shows that the shielding part 22 is in the shielding state, and the damping particles 50 to be tested are placed in the cavity 211. As shown in Figure 2 , the right drawing in FIG. 6 shows that the shielding part 22 can be rotated to the feeding state along the direction indicated by the arrow in the drawing, and the shielding of the feeding opening 212 is removed.

[0061] In other possible specific implementations, the shielding part 22 can also be slidably arranged at the bottom of the damping particle accommodating part 21. Please refer to Figure 3 , which is another schematic diagram of a dynamic cooperation relationship of a shielding part provided in an embodiment of the present application. The shielding part 22 is slidably arranged at the bottom of the damping particle accommodating part 21, as shown in Figure 3 , the left drawing in FIG. 7 shows that the shielding part 22 is in the shielding state, and the damping particles 50 to be tested are placed in the cavity 211. As shown in Figure 3 , the right drawing in FIG. 7 shows that the shielding part 22 can be moved to the feeding state along the direction indicated by the arrow in the drawing, and the shielding of the feeding opening 212 is removed.

[0062] When the shielding of the feeding opening 212 is removed, the damping particles 50 are free to fall during testing. Exemplarily, the feeding opening 212 can be located at a position 0.6 m above the rebounding action surface 1211. Of course, according to different testing needs, the feeding opening 212 can be located at a position 0.5 m-1 m above the rebounding action surface 1211, so as to select a corresponding testing feeding height according to needs.

[0063] Based on the detection unit 30, the first time t1 when the free-falling damping particles 50 collide with the rebounding surface 1211 for the first time and the second time t2 when the damping particles 50 collide with the rebounding surface 1211 for the second time can be measured, and the time difference Δt between the adjacent two times of collision of the damping particles with the rebounding surface is calculated, where the "first collision" and the "second collision" refer to the adjacent two collisions, and the rebounding height h1 of the damping particles 50 after the collision is calculated according to the following formula (1):

[0064]

[0065] In formula (1):

[0066] g--gravity acceleration, taken as 9.8 m / s 2 ;

[0067] h i --the rebounding height of the damping particles after the ith collision, i is a natural number.

[0068] Further, based on the following formula (2), the recovery coefficient of the damping particles can be calculated in combination with the initial height of the damping particles 50:

[0069]

[0070] In formula (2):

[0071] e--the recovery coefficient of the ith collision.

[0072] In order to improve the test accuracy, the arithmetic mean value of the recovery coefficient of the damping particles can be further calculated by formula (3):

[0073]

[0074] In formula (3):

[0075] --the arithmetic mean value of the recovery coefficient of the damping particles, that is, the first arithmetic mean value;

[0076] e i --the recovery coefficient of the damping particles calculated by formula (2).

[0077] It should be understood that the above formula (3) is an example of 5 tests, and the obtained recovery coefficients of the damping particles are calculated and averaged. In application, it is not limited to 5 effective tests, and the actual test times can be determined as needed, and the embodiments of the present application are not limited.

[0078] In other words, after the to-be-tested damping particle is put, the multiple collision restitution coefficients are obtained in the process of continuous collision between the damping particle and the rebounding surface, and the first arithmetic mean of the multiple collision restitution coefficients is taken as the restitution coefficient of the to-be-tested damping particle. Please refer to Figure 5 The figure is a process diagram of continuous collision between the damping particle and the rebounding surface provided by the embodiment of the application. It should be noted that in an ideal state, the rebound of the to-be-tested damping particle is vertically upward. Here, the motion trajectory of the damping particle is stretched horizontally for the convenience of variable marking.

[0079] In order to further improve the test accuracy, the multiple collision restitution coefficient can be: excluding the time difference Δt between the first collision of the to-be-tested damping particle with the rebounding surface and the adjacent two collisions with the rebounding surface is less than 10 -3 s. That is, the first collision of the to-be-tested damping particle is excluded, and the possible influence of the device put is avoided; at the same time, the collision with the time difference Δt less than 10 -3 s in the post-oscillation stage is excluded, and the possible influence of the damping particle after the collision energy loss is avoided.

[0080] Based on the above damping particle restitution coefficient testing device, the embodiment of the application further provides a damping particle restitution coefficient testing method.

[0081] First, in order to obtain a more accurate test structure, the test condition preparation needs to be carried out. First, for the test site, the rigid ground or other rigid bearing is preferred to be selected to reliably place the damping particle restitution coefficient testing device. Second, during the test, there should be no vibration source or sound source around the testing device which can affect the test results. Third, the test is preferably carried out under the environmental temperature condition of 18℃-25℃, and the environmental wind speed is less than 0.5m / s.

[0082] In addition, for the to-be-tested damping particle (sample), it is necessary to ensure that the surface of the damping particle is free of impurities and grease, and the damping particle can be ultrasonically cleaned if necessary. The embodiment of the application is not limited.

[0083] Please refer to Figure 4 The figure is a block diagram of a damping particle restitution coefficient testing method provided by the embodiment of the application.

[0084] The damping particle restitution coefficient testing method includes the following steps:

[0085] S401, put the to-be-tested damping particle;

[0086] S402, obtain the time difference Δt between the adjacent two collisions of the damping particle 50 with the rebounding surface;

[0087] S403, according to the time difference Δt of the adjacent two times of collision with the rebounding surface, the rebounding height h1 of the damping particle 50 is calculated;

[0088] S404, according to the rebounding height h i and the rebounding height h i+1 , that is, the adjacent two rebounding heights, the recovery coefficient e of the damping particle is calculated.

[0089] As described above, in order to further improve the test accuracy, multiple effective tests can be performed to obtain the average value:

[0090] S405, according to the recovery coefficient of the damping particle obtained by multiple tests, the arithmetic mean value is calculated as the recovery coefficient of the damping particle to be tested. That is, after the damping particle to be tested is put into the test, the recovery coefficient of multiple collisions is obtained in the process of collision between the damping particle and the rebounding surface, and the first arithmetic mean value of the recovery coefficient of multiple collisions is taken as the recovery coefficient of the damping particle. In this way, when the material damping characteristic evaluation is performed, each test can be accurately and repeatedly performed under controlled conditions to obtain reliable and consistent test data.

[0091] In addition, in order to further improve the test accuracy, the aforementioned test of putting the damping particle to be tested can include respectively putting multiple damping particles to be tested of the same material and the same size, and taking the second arithmetic mean value of the recovery coefficient of each damping particle as the recovery coefficient of the damping particle. It can be selected according to actual engineering needs, so that the influence of the mass density and other differences of the damping particle to be tested on the recovery coefficient of the damping particle to be tested of the same material and size can be further avoided. That is, by performing multiple tests on multiple damping particles of the same material and size, the average recovery coefficient of the material under the condition of a specific particle size is obtained.

[0092] The above-mentioned test method can be realized by a control unit 40, for example but not limited to, the control unit 40 can be constructed to form a data acquisition and analysis system, which can be composed of a data acquisition front end, analysis software and a computer, and those skilled in the art can realize it based on the prior art, which will not be described here.

[0093] In specific implementation, the A / D conversion resolution is not less than 24bit, and anti-aliasing filter and high-pass filter should be used in the data acquisition and analysis system to eliminate the influence of aliasing and trend items.

[0094] Compared with the relatively complex measuring equipment such as high-speed camera and ultrasonic shot blasting device, the application of the scheme can effectively simplify the test process, has high convenience and real-time performance, by measuring the rebound height at the collision time by the sensor. In addition, the price of the sensor is lower than that of the high-speed camera, which can effectively save the test cost; at the same time, the analysis of the video data will produce errors, and the time error of the sensor recording the collision impact is small, which can guarantee the test precision requirement.

[0095] In addition to the foregoing damping particle recovery coefficient test method and device, the embodiment of the application further provides a computer program product, comprising a computer program, which, when executed by a processor, implements the steps of the damping particle recovery coefficient test method as described above.

[0096] Through the description of the above embodiments, those skilled in the art can clearly understand that the application can be implemented by hardware, or by means of software and necessary general hardware platform, based on such understanding, the technical solution of the application can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which can be a CD-ROM, a U disk, a mobile hard disk, etc.), and includes a plurality of instructions for making a computer device (which can be a personal computer, an electronic device, or a network device, etc.) execute the damping particle recovery coefficient test method described in the application.

[0097] It should be understood that the ordinal numbers "first" and "second" and the like used herein are only used to describe the same function or structure in the technical solution. It can be understood that the use of the ordinal numbers does not constitute a limitation on the understanding of the technical solution claimed by the application.

[0098] The above is only the preferred embodiment of the application, and it should be pointed out that for those skilled in the art, without departing from the principle of the application, a number of improvements and refinements can be made, which should also be considered as the protection scope of the application.

Claims

1. A device for testing the coefficient of restitution of damped particles, characterized in that, Includes a support frame, damped particle delivery assembly, detection unit, and control unit; The damping particle delivery component is mounted on the support and has a delivery port for the damping particles to be tested to pass through and fall freely. The support has a rebound surface, and the rebound surface is located below the delivery port; The detection unit is mounted on the bracket below the delivery port and is used to detect the moment when the damping particle to be tested collides with the rebound surface. The control unit is used to obtain the damping particle recovery coefficient based on the moment when the freely falling damping particle collides with the rebound surface. The detection unit is a vibration acceleration sensor, and the control unit is used to obtain the damping particle recovery coefficient based on the first moment when the freely falling damping particle collides with the rebound surface for the first time and the second moment when the damping particle collides with the rebound surface for the second time. The support includes a support rod and a plate, the support rod extending vertically; the damping particle delivery component is fixedly mounted on the support rod, or the position of the damping particle delivery component relative to the support rod is adjustable; the support also includes a rebound surface located on the upper surface of the plate, and a detection unit disposed on the upper surface of the plate.

2. The damping particle restitution coefficient testing device according to claim 1, characterized in that, The delivery port is located 0.5m-1m above the rebound surface; the plate is made of the same material as the damper shell of the damping particle to be tested; and / or the plate is a rectangular plate with a plate size greater than 500 mm × 500 mm; and / or the plate has a thickness of not less than 10 mm.

3. The damping particle restitution coefficient testing device according to claim 1 or 2, characterized in that, The bracket also includes a base and a support for fixed installation. The support rod is fixedly installed on the base, and the plate is fixedly installed on the support. The damping particle delivery assembly includes a damping particle receiving part and a blocking part. The damping particle receiving part is fixedly installed and has a cavity for receiving damping particles to be tested. The bottom of the cavity has the delivery port. The blocking part is located below the damping particle receiving part and can switch between a blocking state and a delivery state relative to the damping particle receiving part. When the blocking part is in the blocking state, it can block the delivery port of the damping particle receiving part. When the blocking part is in the delivery state, it releases the blocking of the delivery port.

4. The damping particle restitution coefficient testing device according to claim 3, characterized in that, The damping particle delivery assembly also includes a connecting part, which is disposed on the support rod, and the damping particle receiving part is disposed on the connecting part; The shielding part is rotatably disposed on the connecting part, or rotatably disposed on the support rod, so as to rotatably switch between the shielding state and the delivery state; or, the shielding part is slidably disposed at the bottom of the damping particle receiving part, so as to move and switch between the shielding state and the delivery state.

5. A test method based on the damping particle restitution coefficient testing device according to any one of claims 1 to 4, characterized in that, The testing method includes the following steps: Release the damping particles to be tested; The time difference between two consecutive collisions between the damping particle and the rebound surface is obtained. According to the time difference The rebound height of the damped particle is calculated using equation (1). : ; In formula (1): --Acceleration due to gravity, taken as 9.8 m / s² 2 ; --The rebound height of the damped particle after the i-th collision, where i is a natural number; According to the rebound height of the damping particles and the rebound height The collision recovery coefficient of the damping particle is obtained by calculating equation (2). ; ; In formula (2): --The restitution coefficient of the damped particle in the i-th collision.

6. The test method of the damping particle restitution coefficient testing device according to claim 5, characterized in that, After the damping particle to be tested is released, during the continuous collision between the damping particle and the rebound surface, the coefficient of restitution of multiple collisions is obtained, and the first arithmetic mean of the coefficient of restitution of the multiple collisions is used as the coefficient of restitution of the damping particle.

7. The test method of the damping particle restitution coefficient testing device according to claim 6, characterized in that, The coefficient of restitution obtained from multiple collisions is calculated by excluding the time difference between the first collision between the damping particle and the rebound surface and two adjacent collisions with the rebound surface. Less than 10 -3 The collision of s; the release of the damping particles to be tested includes releasing multiple damping particles of the same material and the same size, and using the second arithmetic average of the restitution coefficients of each damping particle as the restitution coefficient of the damping particle.

8. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by the processor, it implements the steps of the test method of the damping particle restitution coefficient test device according to any one of claims 5 to 7.

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