Resonant frequency adjustable acceleration test system and test method

Abstract

According to the resonant frequency-adjustable acceleration test system and test method provided by the invention, the Z-axis guide module, the rigid adjustment module, the acceleration sensor module and the test contact form the acceleration test head, and the touch panel is tested through the acceleration test head, so that factory assembly line test can be realized, and the test efficiency is high. Through the rigid adjusting module, the inherent frequency of the acceleration measuring head is continuously adjusted to test the acceleration value, and the maximum acceleration value is used as the real acceleration value of the touch point on the touch panel. The maximum acceleration value is the test result of the acceleration sensor module when the vibration frequency of the acceleration measuring head is consistent with the vibration frequency of the contact on the touchpad, so that the situation that the acceleration test result is small due to the fact that the vibration frequency of the acceleration measuring head is inconsistent with the vibration frequency of the contact on the tested touchpad is avoided, and the test result is more accurate.

Description

Technical Field

[0001] The present application relates to the field of pressure touch technology, and in particular to an acceleration testing system and a testing method with adjustable resonant frequency. Background Art

[0002] With the development of technology and the ever-increasing user needs, the performance requirements for laptop touchpads are also constantly increasing. Touchpads with pressure sensing and vibration feedback are gaining more and more attention and favor from users. In order to ensure the performance of the product, manufacturers need to test the vibration amplitude of the touchpad, and usually use the acceleration value of the touchpad contact area to reflect the performance of this vibration feedback.

[0003] In the prior art, there are several solutions for testing vibration amplitude. Some use laser displacement sensors to test the displacement data of the product under test. Some use acceleration sensors to directly act on the measuring point position on the surface of the touch panel through a mechanism to collect acceleration data. Others directly adhere the acceleration sensor to the product under test with glue for testing. In addition, there is also a method of fixing the acceleration sensor on the base of the product under test, and then making the base product into a floating structure for testing.

[0004] When using laser displacement sensors to collect displacement data, there are differences between displacement data and vibration feedback. In addition, laser displacement sensors are non-contact tests. For the vibration test of the touch panel, the test requirement is to test the vibration feedback of the touch panel when the touch panel is subjected to a certain pressure (for example, the user's finger presses it to trigger the force), so the laser displacement sensor is not suitable for this test requirement. Using an accelerometer to directly act on the measuring point position on the surface of the touch panel through a mechanism for testing can solve the problem of the force on the touch panel, but the difference in the mechanism will cause inconsistent test results, and the mechanical impedance of the mechanism will reduce the acceleration value of the touch panel, affecting the accuracy of the test results. The most accurate method for collecting acceleration values ​​is to directly adhere the accelerometer to the product under test with glue for testing, but this method cannot be fully tested on the factory assembly line. The first is that the glue will damage the surface of the product, and the second is that this test method is inefficient. Fixing the accelerometer on the base of the product under test for testing is similar to the second method, and the structure of the base will weaken the collection of acceleration values. Summary of the invention

[0005] The purpose of the embodiments of the present application is to provide an acceleration testing system and a testing method with adjustable resonant frequency, so as to solve the problems of low testing efficiency and inaccurate test results in the existing testing methods for touch panels.

[0006] An acceleration test system with adjustable resonant frequency provided in an embodiment of the present application includes: a Z-axis guide module, a rigidity adjustment module, an acceleration sensor module and a test contact head;

[0007] The rigidity adjustment module, the acceleration sensor module and the test contact head are fixedly connected in sequence;

[0008] The Z-axis guide module is used to limit the rigidity adjustment module, the acceleration sensor module and the test contact head to move in the Z-axis direction, and to lift or release the whole;

[0009] The rigidity adjustment module is used to change the natural frequency of the acceleration test system; the test contact head is used to contact the touch panel under test;

[0010] The acceleration sensor module is used for: when the touch panel under test vibrates, the test contact head transmits the vibration to the acceleration sensor module, and the acceleration sensor module senses the vibration to obtain the acceleration value.

[0011] In the above technical solution, the Z-axis guide module, the rigidity adjustment module, the acceleration sensor module and the test contact head constitute an acceleration probe. By testing the touch panel through the acceleration probe, factory assembly line testing can be achieved with high testing efficiency. Through the rigidity adjustment module, the natural frequency of the acceleration probe is continuously adjusted to test the acceleration value, and the maximum acceleration value is used as the true acceleration value of the contact on the touch panel. The maximum acceleration value is the test result of the acceleration sensor module when the vibration frequency of the acceleration probe is consistent with the vibration frequency of the contact on the touch panel, which avoids the small acceleration test result caused by the inconsistent vibration frequency of the acceleration probe and the contact on the touch panel being tested, and the test result is more accurate.

[0012] In some optional embodiments, the rigidity adjustment module includes: an elastic steel sheet, a rotation support assembly, a steel sheet connecting column and a motor fixing plate;

[0013] The lower surface edge of the motor fixing plate is connected to the elastic steel sheet through a steel sheet connecting column;

[0014] The rotating support assembly is arranged between the motor fixing plate and the elastic steel sheet;

[0015] When the rotating support assembly rotates at different angles, the rotating support assembly presses against different positions of the elastic steel sheet, and the effective elastic length of the elastic steel sheet is different; wherein the effective elastic length is the distance between the contact point on the upper surface of the elastic steel sheet and the nearest contact point on the lower surface of the elastic steel sheet;

[0016] The acceleration sensor module is fixedly installed at the center point of the lower surface of the elastic steel sheet.

[0017] In the above technical solution, the natural frequency of the acceleration probe is changed by adjusting the rigidity of the rigidity adjustment module. Specifically, the rigidity adjustment module includes an elastic steel sheet and a rotating support assembly. One end of the elastic steel sheet is connected to the acceleration sensor module, and the other end of the elastic steel sheet is connected to the acceleration probe body to form a cantilever beam structure. The rotating support assembly is then controlled to rotate so that the rotating support assembly supports different positions of the elastic steel sheet, thereby changing the effective elastic length of the elastic steel sheet, that is, changing the rigidity of the cantilever beam structure, thereby changing the overall natural frequency of the acceleration probe.

[0018] In some optional embodiments, the rotation support assembly includes a mounting plate and four asymptote support bars; the four asymptote support bars are fixedly mounted on the lower surface of the mounting plate;

[0019] The steel sheet connecting column includes a first steel sheet connecting column, a second steel sheet connecting column, a third steel sheet connecting column and a fourth steel sheet connecting column;

[0020] The elastic steel sheet includes a cross-shaped steel sheet;

[0021] The first end of the cross-shaped steel sheet is connected to the first steel sheet connecting column, the second end of the cross-shaped steel sheet is connected to the second steel sheet connecting column, the third end of the cross-shaped steel sheet is connected to the third steel sheet connecting column, and the fourth end of the cross-shaped steel sheet is connected to the fourth steel sheet connecting column.

[0022] In the above technical solution, the rotating support assembly includes four asymptotic support bars, the elastic steel sheet includes a cross-shaped steel sheet, and each asymptotic support bar contacts a cantilever beam corresponding to the cross-shaped steel sheet. As the angle of the rotating support assembly changes, the contact position of the asymptotic support bar and the elastic steel sheet will also change from inside to outside (or from outside to inside), thereby changing the effective elastic length of the elastic steel sheet.

[0023] In some optional embodiments, the rotating support assembly includes: a rectangular support bar and a mounting plate; the rectangular support bar is fixedly mounted on the lower surface of the mounting plate;

[0024] A first contact block and a second contact block are arranged on both sides of the bottom surface of the rectangular support bar; the steel sheet connecting column comprises a first steel sheet connecting column and a second steel sheet connecting column;

[0025] The elastic steel sheet comprises a first semicircular ring steel sheet and a second semicircular ring steel sheet;

[0026] When the rectangular support bar rotates, the first contact block presses against different positions of the first semicircular ring steel sheet, and the second contact block presses against different positions of the second semicircular ring steel sheet;

[0027] An upper surface of one side of the first semicircular ring steel sheet is connected to the first steel sheet connecting column, and a lower surface of the other side of the first semicircular ring steel sheet is connected to the top of the first sensor connecting column;

[0028] An upper surface on one side of the second semicircular ring steel sheet is connected to the second steel sheet connecting column, and a lower surface on the other side of the second semicircular ring steel sheet is connected to the top end of the second sensor connecting column.

[0029] The bottom ends of the first sensor connecting column and the second sensor connecting column are connected to the acceleration sensor module through a sensor fixing plate.

[0030] In the above technical solution, the rotating support assembly includes a rectangular support bar, the elastic steel sheet includes two semicircular steel sheets, one end of the rectangular support bar contacts one of the semicircular steel sheets, and the other end of the rectangular support bar contacts the other semicircular steel sheet. As the angle of the rotating support assembly changes, the contact position between the rectangular support bar and the semicircular steel sheet will change along the circular direction, thereby changing the effective elastic length of the elastic steel sheet (i.e., the length of the arc).

[0031] In some optional embodiments, the rigidity adjustment module further includes a motor;

[0032] The motor is arranged on the upper surface of the motor fixing plate; the motor is used to drive the rotating support assembly to rotate to a set angle.

[0033] In the above technical solution, the motor can be a stepper motor. The stepper motor is mounted on the motor fixing plate. The stepper motor can rotate the rotating support assembly according to a certain angle after receiving the pulse number from the host computer of the test machine.

[0034] In some optional embodiments, the rigidity adjustment module further includes: a proximity sensor; a reset magnet is arranged at a non-central point of the mounting plate;

[0035] The proximity sensor is used to sense the reset magnet;

[0036] During the test, the motor drives the rotating support assembly to rotate clockwise or counterclockwise by a certain angle each time; at the end of the test, the motor drives the rotating support assembly to rotate in the opposite direction until the proximity sensor senses the reset magnet and the rotating support assembly stops rotating.

[0037] In the above technical solution, the proximity sensor is fixed on the motor fixing plate, and the angle resetting of the rotating support assembly is achieved by sensing the resetting magnet on the rotating support assembly.

[0038] In some optional embodiments, the rigidity adjustment module further includes: a plurality of leveling components;

[0039] A plurality of leveling assemblies are used to adjust the flatness of the rotating support assembly;

[0040] The leveling component is arranged on the motor fixing plate and passes through the motor fixing plate to contact the upper surface of the mounting plate. The leveling component comprises: a ball screw and a locking nut.

[0041] In the above technical solution, a plurality of leveling components are installed on the motor fixing plate, and the leveling components include ball screws and locking nuts, and the flatness of the rotating support component can be adjusted by the ball screws and locking nuts.

[0042] In some optional embodiments, the Z-axis guide module includes: a probe fixing plate, a linear bearing and a linear guide shaft;

[0043] The linear bearing passes through the probe fixing plate;

[0044] The linear guide shaft passes through the linear bearing, and the linear guide shaft moves freely in the linear bearing along the Z direction;

[0045] The bottom end of the linear guide shaft is connected to the center point of the connecting piece, and the lower surface edge of the connecting piece is connected to the rigidity adjustment module through the guide module connecting column.

[0046] In the above technical solution, the rigidity adjustment module, the acceleration sensor module and the test contact head can float freely in the Z-axis direction through linear bearings and linear guide shafts.

[0047] In some optional embodiments, the Z-axis guide module further includes: a counterweight, a lifting sheet metal, and a lifting cylinder;

[0048] The top end of the linear guide shaft is connected to the counterweight block; the lifting sheet metal is arranged between the counterweight block and the probe fixing plate, and the lifting sheet metal is used to lift the counterweight block, thereby driving the rigidity adjustment module, the acceleration sensor module and the test contact head to rise as a whole; the lifting cylinder is used to drive the lifting sheet metal to rise.

[0049] In the above technical solution, when the acceleration test system is reset or stops testing, the lifting cylinder is used to drive the lifting sheet metal so that the acceleration probe is lifted; when the acceleration test system is testing, the acceleration probe is moved above the touch panel to be tested, the lifting cylinder drives the lifting sheet metal to descend, and the acceleration probe slowly descends along the Z-axis direction so that the test contact head of the acceleration probe contacts the measuring point surface of the touch panel to be tested.

[0050] An acceleration testing method provided in an embodiment of the present application is applied to an acceleration testing system with adjustable resonant frequency as described in any one of the above items, and the method comprises:

[0051] Release the rigidity adjustment module, the acceleration sensor module and the test contact head as a whole onto the touch panel to be tested;

[0052] Within the adjustable frequency range, the natural frequency of the acceleration test system is set to different frequency values, and the following processes are performed respectively: the touch panel under test is driven to vibrate; when the touch panel under test vibrates, the test contact head transmits the vibration to the acceleration sensor module, and the acceleration sensor module senses the vibration to obtain the acceleration value;

[0053] Finally, the maximum value of the acceleration values ​​corresponding to different frequency values ​​is taken as the true acceleration value of the touch panel under test. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0055] Figure 1 A functional module diagram of an acceleration test system with adjustable resonant frequency provided in an embodiment of the present application;

[0056] Figure 2 A structural diagram of an acceleration test system with adjustable resonant frequency provided in the first embodiment of the present application;

[0057] Figure 3 A structural diagram of a rigidity adjustment module provided in the first embodiment of the present application;

[0058] Figure 4 A structural diagram of a rotating support assembly provided in the first embodiment of the present application;

[0059] Figure 5 A structural diagram of a rigidity adjustment module provided in the second embodiment of the present application;

[0060] Figure 6 This is a structural diagram of the elastic steel sheet provided in the second embodiment of the present application.

[0061] Icons: 1-Z-axis guide module, 11-counterweight, 12-lifting sheet metal, 13-lifting cylinder, 14-probe fixing plate, 15-linear bearing, 16-linear guide shaft, 17-guide module connecting column, 2-rigidity adjustment module, 21-proximity sensor, 22-motor, 23-ball screw, 24-locking nut, 25-rotation support assembly, 26-elastic steel sheet, 261-sensor fixing plate, 27-reset magnet, 28-steel sheet connecting column, 29-motor fixing plate, 3-acceleration sensor module, 4-test contact head. DETAILED DESCRIPTION

[0062] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0063] Please refer to Figure 1 , Figure 1A functional module diagram of an acceleration test system with adjustable resonant frequency provided in an embodiment of the present application includes: a Z-axis guide module 1, a rigidity adjustment module 2, an acceleration sensor module 3 and a test contact head 4.

[0064] Among them, the rigidity adjustment module 2, the acceleration sensor module 3 and the test contact head 4 are fixedly connected in sequence; the Z-axis guide module 1 is used to limit the rigidity adjustment module 2, the acceleration sensor module 3 and the test contact head 4 to move in the Z-axis direction as a whole, and to lift or release the whole; the rigidity adjustment module 2 is used to change the natural frequency of the acceleration test system; the test contact head 4 is used to contact the touch panel under test; the acceleration sensor module 3 is used for: when the touch panel under test vibrates, the test contact head 4 transmits the vibration to the acceleration sensor module 3, and the acceleration sensor module senses the vibration to obtain the acceleration value.

[0065] In the embodiment of the present application, the Z-axis guide module 1, the rigidity adjustment module 2, the acceleration sensor module 3 and the test contact head 4 constitute an acceleration probe. By testing the touch panel through the acceleration probe, factory assembly line testing can be achieved with high testing efficiency. Through the rigidity adjustment module 2, the natural frequency of the acceleration probe is continuously adjusted to test the acceleration value, and the maximum acceleration value is used as the true acceleration value of the contact on the touch panel. The maximum acceleration value is the test result of the acceleration sensor module 3 when the vibration frequency of the acceleration probe is consistent with the vibration frequency of the contact on the touch panel, which avoids the acceleration test result being too small due to the inconsistent vibration frequency of the acceleration probe and the contact on the tested touch panel, and the test result is more accurate.

[0066] Please refer to Figure 2 , Figure 2 A structural diagram of an acceleration testing system with adjustable resonant frequency provided in the first embodiment of the present application.

[0067] In some optional embodiments, the rigidity adjustment module 2 includes: an elastic steel sheet 26 , a rotation support assembly 25 , a steel sheet connecting column 28 and a motor fixing plate 29 .

[0068] Among them, the lower surface edge of the motor fixing plate 29 is connected to the elastic steel sheet 26 through the steel sheet connecting column 28; the rotating support assembly 25 is arranged between the motor fixing plate 29 and the elastic steel sheet 26; when the rotating support assembly 25 rotates to different angles, the rotating support assembly 25 supports different positions of the elastic steel sheet 26, and the effective elastic length of the elastic steel sheet 26 is different; wherein, the effective elastic length is the distance between the contact point on the upper surface of the elastic steel sheet 26 and the nearest contact point on the lower surface of the elastic steel sheet 26; the acceleration sensor module 3 is fixedly installed at the center point of the lower surface of the elastic steel sheet 26.

[0069] In an embodiment of the present application, the natural frequency of the acceleration probe is changed by adjusting the rigidity of the rigidity adjustment module 2. Specifically, the rigidity adjustment module 2 includes an elastic steel sheet 26 and a rotating support assembly 25. One end of the elastic steel sheet 26 is connected to the acceleration sensor module 3, and the other end of the elastic steel sheet 26 is connected to the acceleration probe body to form a cantilever beam structure. The rotating support assembly 25 is then controlled to rotate so that the rotating support assembly 25 supports different positions of the elastic steel sheet 26, thereby changing the effective elastic length of the elastic steel sheet 26, that is, changing the rigidity of the cantilever beam structure, thereby changing the overall natural frequency of the acceleration probe.

[0070] Please refer to Figure 3 , Figure 3 This is a structural diagram of the rigidity adjustment module 2 provided in the first embodiment of the present application.

[0071] In some optional embodiments, the rotating support assembly 25 includes a mounting plate and four asymptotic support bars; the four asymptotic support bars are fixedly mounted on the lower surface of the mounting plate, such as Figure 4 shown.

[0072] The steel sheet connecting column 28 includes a first steel sheet connecting column 28, a second steel sheet connecting column 28, a third steel sheet connecting column 28 and a fourth steel sheet connecting column 28; the elastic steel sheet 26 includes a cross-shaped steel sheet; the first end of the cross-shaped steel sheet is connected to the first steel sheet connecting column 28, the second end of the cross-shaped steel sheet is connected to the second steel sheet connecting column 28, the third end of the cross-shaped steel sheet is connected to the third steel sheet connecting column 28, and the fourth end of the cross-shaped steel sheet is connected to the fourth steel sheet connecting column 28.

[0073] In the embodiment of the present application, the rotating support assembly 25 includes four asymptotic support bars, and the elastic steel sheet 26 includes a cross-shaped steel sheet, and each asymptotic support bar contacts a cantilever beam corresponding to the cross-shaped steel sheet. As the angle of the rotating support assembly 25 changes, the contact position of the asymptotic support bar and the elastic steel sheet 26 will also change from inside to outside (or from outside to inside), thereby changing the effective elastic length of the elastic steel sheet 26.

[0074] In some optional embodiments, the rigidity adjustment module 2 further includes a motor 22 ; the motor 22 is disposed on the upper surface of the motor fixing plate 29 ; the motor 22 is used to drive the rotating support assembly 25 to rotate a set angle.

[0075] In the embodiment of the present application, the motor 22 may be a stepper motor 22. The stepper motor 22 is mounted on a motor fixing plate 29. The stepper motor 22 may rotate the rotating support assembly 25 at a certain angle after receiving the pulse number from the host computer of the test machine.

[0076] In some optional implementations, the rigidity adjustment module 2 further includes: a proximity sensor 21 ; a reset magnet 27 is disposed at a non-central point of the mounting plate; and the proximity sensor 21 is used to sense the reset magnet 27 .

[0077] During the test, the motor 22 drives the rotating support assembly 25 to rotate clockwise or counterclockwise by a certain angle each time; at the end of the test, the motor 22 drives the rotating support assembly 25 to rotate in the opposite direction until the proximity sensor senses the reset magnet 27 and the rotating support assembly 25 stops rotating.

[0078] In the embodiment of the present application, the proximity sensor 21 is fixed on the motor fixing plate 29 , and the angle of the rotating support assembly 25 is reset by sensing the reset magnet 27 on the rotating support assembly 25 .

[0079] In some optional embodiments, the rigidity adjustment module 2 further includes: a plurality of leveling components; the plurality of leveling components are used to adjust the flatness of the rotating support component 25. The leveling components are arranged on the motor fixing plate 29 and pass through the motor fixing plate 29 to contact the upper surface of the mounting plate, and the leveling components include: a ball screw 23 and a locking nut 24.

[0080] In the embodiment of the present application, a plurality of leveling components are installed on the motor fixing plate 29 , and the leveling components include a ball screw 23 and a locking nut 24 , and the flatness of the rotating support component 25 can be adjusted by the ball screw 23 and the locking nut 24 .

[0081] In some optional embodiments, the Z-axis guide module 1 includes: a probe fixing plate 14 , a linear bearing 15 and a linear guide shaft 16 .

[0082] Among them, the linear bearing 15 passes through the probe fixing plate 14; the linear guide shaft 16 passes through the linear bearing 15, and the linear guide shaft 16 moves freely along the Z direction in the linear bearing 15; the bottom end of the linear guide shaft 16 is connected to the center point of the connecting plate, and the lower surface edge of the connecting plate is connected to the rigidity adjustment module 2 through the guide module connecting column 17.

[0083] In the embodiment of the present application, the rigidity adjustment module 2, the acceleration sensor module 3 and the test contact head 4 can float freely in the Z-axis direction through the linear bearing 15 and the linear guide shaft 16.

[0084] In some optional embodiments, the Z-axis guide module 1 further includes: a counterweight block, a lifting sheet metal 12 and a lifting cylinder 13 .

[0085] Among them, the top end of the linear guide shaft 16 is connected to the counterweight block; the lifting sheet metal 12 is arranged between the counterweight block 11 and the probe fixing plate 14, and the lifting sheet metal 12 is used to lift the counterweight block 11, driving the overall rise of the rigidity adjustment module 2, the acceleration sensor module 3 and the test contact head 4; the lifting cylinder 13 is used to drive the lifting sheet metal 12 to rise.

[0086] In the embodiment of the present application, when the acceleration testing system is reset or stops testing, the lifting cylinder 13 is used to drive the lifting sheet metal 12 so that the acceleration probe is lifted; when the acceleration testing system is testing, the acceleration probe is moved above the touch panel being tested, the lifting cylinder 13 drives the lifting sheet metal 12 to descend, and the acceleration probe slowly descends along the Z-axis direction so that the test contact head 4 of the acceleration probe contacts the measuring point surface of the touch panel being tested.

[0087] Please refer to Figure 5 , Figure 5 This is a structural diagram of the rigidity adjustment module 2 provided in the second embodiment of the present application. The difference from the first embodiment is that:

[0088] The rotating support assembly 25 of this embodiment includes: a rectangular support bar and a mounting plate; the rectangular support bar is fixedly mounted on the lower surface of the mounting plate; a first contact block and a second contact block are arranged on both sides of the bottom surface of the rectangular support bar; the steel sheet connecting column 28 includes a first steel sheet connecting column 28 and a second steel sheet connecting column 28; the elastic steel sheet 26 includes a first semicircular steel sheet and a second semicircular steel sheet, such as Figure 6 shown.

[0089] When the rectangular support bar rotates, the first contact block presses against different positions of the first semicircular steel sheet, and the second contact block presses against different positions of the second semicircular steel sheet; the upper surface of one side of the first semicircular steel sheet is connected to the first steel sheet connecting column 28, and the lower surface of the other side of the first semicircular steel sheet is connected to the top of the first sensor connecting column; the upper surface of one side of the second semicircular steel sheet is connected to the second steel sheet connecting column 28, and the lower surface of the other side of the second semicircular steel sheet is connected to the top of the second sensor connecting column. The bottom ends of the first sensor connecting column and the second sensor connecting column are connected to the acceleration sensor module 3 through the sensor fixing plate 261.

[0090] In the embodiment of the present application, the rotating support assembly 25 includes a rectangular support bar, and the elastic steel sheet 26 includes two semicircular steel sheets. One end of the rectangular support bar contacts one of the semicircular steel sheets, and the other end of the rectangular support bar contacts the other semicircular steel sheet. As the angle of the rotating support assembly 25 changes, the contact position between the rectangular support bar and the semicircular steel sheet will change along the circular direction, thereby changing the effective elastic length of the elastic steel sheet 26 (i.e., the length of the arc).

[0091] An acceleration testing method provided in an embodiment of the present application is applied to an acceleration testing system with adjustable resonant frequency as described in any one of the above items, and the method comprises:

[0092] Step 100, releasing the rigidity adjustment module, the acceleration sensor module and the test contact head as a whole onto the touch panel to be tested;

[0093] Step 200: within the adjustable frequency range, set the natural frequency of the acceleration test system to different frequency values, and respectively perform the following processes: drive the touch panel under test to vibrate; when the touch panel under test vibrates, the test contact head transmits the vibration to the acceleration sensor module, and the acceleration sensor module senses the vibration to obtain the acceleration value;

[0094] Step 300: Finally, the maximum value of the acceleration values ​​corresponding to different frequency values ​​is taken as the real acceleration value of the touch panel under test.

[0095] In the embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some communication interfaces, and the indirect coupling or communication connection of the devices or units can be electrical, mechanical or other forms.

[0096] In addition, the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0097] Furthermore, the functional modules in the various embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.

[0098] In this document, relational terms such as first and second, etc. are used merely to distinguish one entity or operation from another entity or operation, but do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0099] The above description is only an embodiment of the present application and is not intended to limit the protection scope of the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An acceleration test system with adjustable resonant frequency, characterized in that: include: Z-axis guide module, rigidity adjustment module, acceleration sensor module and test contact head; The rigidity adjustment module, the acceleration sensor module and the test contact head are fixedly connected in sequence; The Z-axis guide module is used to restrict the rigidity adjustment module, the acceleration sensor module and the test contact head from moving in the Z-axis direction, and to lift or release the whole. The rigidity adjustment module is used to change the natural frequency of the acceleration test system; the test contact head is used to contact the touch panel under test; The acceleration sensor module is used for: when the touch panel under test vibrates, the test contact head transmits the vibration to the acceleration sensor module, and the acceleration sensor module senses the vibration to obtain an acceleration value.

2. The system according to claim 1, characterized in that The rigidity adjustment module comprises: an elastic steel sheet, a rotating support assembly, a steel sheet connecting column and a motor fixing plate; The lower surface edge of the motor fixing plate is connected to the elastic steel sheet through a steel sheet connecting column; The rotating support assembly is arranged between the motor fixing plate and the elastic steel sheet; When the rotating support assembly rotates at different angles, the rotating support assembly bears against different positions of the elastic steel sheet, and the effective elastic length of the elastic steel sheet is different; wherein the effective elastic length is the distance between the contact point on the upper surface of the elastic steel sheet and the nearest contact point on the lower surface of the elastic steel sheet; The acceleration sensor module is fixedly mounted at the center point of the lower surface of the elastic steel sheet.

3. The system according to claim 2, characterized in that The rotating support assembly includes a mounting plate and four asymptote support bars; the four asymptote support bars are fixedly mounted on the lower surface of the mounting plate; The steel sheet connecting column comprises a first steel sheet connecting column, a second steel sheet connecting column, a third steel sheet connecting column and a fourth steel sheet connecting column; The elastic steel sheet comprises a cross-shaped steel sheet; The first end of the cross-shaped steel sheet is connected to the first steel sheet connecting column, the second end of the cross-shaped steel sheet is connected to the second steel sheet connecting column, the third end of the cross-shaped steel sheet is connected to the third steel sheet connecting column, and the fourth end of the cross-shaped steel sheet is connected to the fourth steel sheet connecting column.

4. The system according to claim 2, characterized in that The rotating support assembly comprises: a rectangular support bar and a mounting plate; the rectangular support bar is fixedly mounted on the lower surface of the mounting plate; The first contact block and the second contact block are arranged on both sides of the bottom surface of the rectangular support bar; the steel sheet connecting column includes a first steel sheet connecting column and a second steel sheet connecting column; The elastic steel sheet comprises a first semicircular ring steel sheet and a second semicircular ring steel sheet; When the rectangular support bar rotates, the first contact block presses against different positions of the first semicircular ring steel sheet, and the second contact block presses against different positions of the second semicircular ring steel sheet; An upper surface of one side of the first semicircular steel sheet is connected to the first steel sheet connecting column, and a lower surface of the other side of the first semicircular steel sheet is connected to the top of the first sensor connecting column; An upper surface of one side of the second semicircular ring steel sheet is connected to the second steel sheet connecting column, and a lower surface of the other side of the second semicircular ring steel sheet is connected to the top end of the second sensor connecting column; The bottom ends of the first sensor connecting column and the second sensor connecting column are connected to the acceleration sensor module via a sensor fixing plate.

5. The system according to any one of claims 3 to 4, characterized in that: The rigidity adjustment module also includes a motor; The motor is arranged on the upper surface of the motor fixing plate; the motor is used to drive the rotating support assembly to rotate a set angle.

6. The system according to claim 5, characterized in that The rigidity adjustment module also includes: a proximity sensor; a reset magnet is arranged at a non-central point of the mounting plate; The proximity sensor is used to sense the reset magnet; During the test, the motor drives the rotating support assembly to rotate clockwise or counterclockwise by a certain angle each time; at the end of the test, the motor drives the rotating support assembly to rotate in the opposite direction until the proximity sensor senses the reset magnet and the rotating support assembly stops rotating.

7. The system according to any one of claims 3-4, characterized in that: The rigidity adjustment module also includes: a plurality of leveling components; The plurality of leveling assemblies are used to adjust the flatness of the rotating support assembly; The leveling assembly is arranged on the motor fixing plate and passes through the motor fixing plate to contact the upper surface of the mounting plate. The leveling assembly includes: a ball screw and a locking nut.

8. The system of claim 1, wherein: The Z-axis guide module comprises: a probe fixing plate, a linear bearing and a linear guide shaft; The linear bearing passes through the probe fixing plate; The linear guide shaft passes through the linear bearing, and the linear guide shaft is free to move along the Z direction in the linear bearing; The bottom end of the linear guide shaft is connected to the center point of the connecting piece, and the lower surface edge of the connecting piece is connected to the rigidity adjustment module through the guide module connecting column.

9. The system according to claim 8, characterized in that The Z-axis guide module also includes: a counterweight block, a lifting sheet metal and a lifting cylinder; The top end of the linear guide shaft is connected to the counterweight block; the lifting sheet metal is arranged between the counterweight block and the probe fixing plate, and the lifting sheet metal is used to lift the counterweight block, thereby driving the overall ascent of the rigidity adjustment module, the acceleration sensor module and the test contact head; the lifting cylinder is used to drive the lifting sheet metal to rise.

10. An acceleration testing method, characterized in that: An acceleration test system with adjustable resonant frequency as described in any one of claims 1 to 9, the method comprising: The rigidity adjustment module, the acceleration sensor module and the test contact head are released as a whole onto the touch panel to be tested; Within the adjustable frequency range, the natural frequency of the acceleration test system is set to different frequency values, and the following processes are respectively performed: driving the touch panel under test to vibrate; when the touch panel under test vibrates, the test contact head transmits the vibration to the acceleration sensor module, and the acceleration sensor module senses the vibration to obtain an acceleration value; Finally, the maximum value of the acceleration values ​​corresponding to different frequency values ​​is taken as the true acceleration value of the touch panel under test.

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