Testing device for pressure-sensitive product

Abstract

The utility model discloses a testing device for a pressure-sensitive product, which is characterized in that a support base, a pressure-sensitive product placement seat, a support frame assembly, a first driver, a second driver, a pressure sensor and a striking piece are arranged in a matched manner, and the pressure sensor can set a preset pressure value; the second driver controls the striking piece to press down a preset step value according to a preset pressure value and abut against the test position of the to-be-tested pressure-sensitive product, a pressure-sensitive chip on the to-be-tested pressure-sensitive product reads a current pressure value, the control module judges whether the current pressure value is the same as the preset pressure value or not, and the test passes if the current pressure value is the same as the preset pressure value. According to the pressure-sensitive product testing device, the pressure-sensitive product can be tested without expensive equipment and instruments, the pressure-sensitive product can be tested in a low-cost mode, tests of different precisions can be achieved through the combination of different striking pieces and the second driver, the testing requirements of different environments are met, meanwhile, the whole test is completed automatically, and the requirement for the proficiency degree of operators is low.

Description

TECHNICAL FIELD

[0001] The utility model relates to the testing technical field of pressure sensing product, specifically to a pressure sensing product testing device. BACKGROUND

[0002] The pressure sensing product needs to be tested before being put on the market to ensure that it can work accurately, stably and reliably in the real use scene. The test is not only a necessary link of quality control, but also a basic guarantee for product function implementation and user experience.

[0003] In the conventional pressure sensing product production test, there are the following test equipment:

[0004] Digital pressure calibrator: although it can automate part of the process, the equipment cost is high, especially for mass production, the cost increases obviously;

[0005] Piston pressure gauge: provides very high precision, but is large in size and inconvenient to move, and is difficult to adapt to on-site use;

[0006] Reference sensor / standard: although it can ensure high precision, it is expensive itself and sensitive to environmental changes.

[0007] Manual or electric pressure pump: used to generate accurate pressure values, but requires skilled operators and is low in efficiency. INVENTION CONTENTS

[0008] Therefore, it is necessary to provide a pressure sensing product testing device. The problems of the existing test equipment in the background art, such as high cost, sensitivity to environmental changes and the need for skilled operators, are solved.

[0009] A pressure sensing product testing device, comprising a support base, a pressure sensing product placing seat, a support frame assembly, a first drive, a second drive, a pressure sensor and a striking piece, the pressure sensing product placing seat and the support frame assembly are respectively installed at both ends of the support base, the support frame assembly comprises a support, a guide shaft and a workbench, the support and the guide shaft are respectively installed on the support base, the first drive is installed on the support base, and the other end is fixedly connected with the workbench, the workbench is driven by the first drive to slide along the support, the second drive is installed on the workbench, the pressure sensor is installed on the second drive, and the striking piece is installed on the pressure sensor and corresponds to the pressure sensing product placing seat in the vertical direction.

[0010] In one embodiment, the first drive has a mounting plate, and the mounting plate is detachably connected with the workbench.

[0011] In one of the embodiments, the testing device of the pressure-sensitive product further comprises a moving assembly, which comprises a third driver, a limiting seat, a moving plate, a sliding rail and a sliding block, the sliding rail, the limiting seat and the third driver are respectively installed on the workbench, one end of the moving plate is installed on the sliding block, and the other end is fixedly connected with the third driver.

[0012] In one of the embodiments, a limiting groove is formed in the limiting seat, and one end of the moving plate slides in the limiting groove.

[0013] In one of the embodiments, the first driver and the third driver are air cylinders.

[0014] In one of the embodiments, the second driver is a stepping motor.

[0015] A testing method of a pressure-sensitive product, which is applied to the testing method of the testing device of the pressure-sensitive product, the method comprises:

[0016] placing the pressure-sensitive product to be tested on a pressure-sensitive product placing seat;

[0017] driving the workbench to reach a preset position by the first driver;

[0018] setting a preset pressure value by the pressure sensor and sending the preset pressure value to the control module;

[0019] controlling the striker to be pressed down by a preset step value and abut against the testing position of the pressure-sensitive product to be tested according to the preset pressure value by the second driver;

[0020] reading an actual pressure value by the pressure-sensitive chip of the pressure-sensitive product to be tested and sending the actual pressure value to the control module;

[0021] judging whether the fit degree of the pressure-sensitive chip of the pressure-sensitive product to be tested is normal according to the preset pressure value and the actual pressure value by the control module, if yes, the next step is performed;

[0022] judging whether the testing device needs to be calibrated, if yes, the next step is performed;

[0023] calibrating the testing device.

[0024] In one of the embodiments,

[0025] the method for judging whether the fit degree of the pressure-sensitive chip of the pressure-sensitive product to be tested is normal according to the preset pressure value and the actual pressure value by the control module is:

[0026] judging whether the actual pressure value is greater than a preset threshold value and less than the preset pressure value, if yes, the testing device is calibrated; otherwise, the host computer judges that the calibration fails;

[0027] In one of the embodiments,

[0028] The method for calibrating the testing device is:

[0029] Moving the hitting head to a position above the to-be-tested key but not in contact with the to-be-tested key;

[0030] Controlling the hitting head to be pressed by a preset step value;

[0031] Obtaining a current pressure value of the pressure sensor at this time;

[0032] Calculating a compensation step value: ΔS = (set pressure value - current pressure value) / pressure calibration coefficient, and the pressure calibration coefficient = pressure value corresponding to each step;

[0033] Lifting the hitting head to the original position and then pressing the hitting head by the newly calculated step value.

[0034] In one of the embodiments, when the current pressure value of the pressure sensor at this time is obtained, the current pressure value can be obtained continuously for a preset number of times, and whether the difference between the first current pressure value and the last current pressure value is less than a preset threshold value is judged; if yes, it is considered that the data is valid, and if no, the sampling is re-performed.

[0035] The testing device of the pressure sensing product is provided by cooperation of the supporting base, the pressure sensing product placing seat, the supporting frame assembly, the first driver, the second driver, the pressure sensor and the hitting piece. The pressure sensor can set a preset pressure value, the second driver controls the hitting piece to be pressed by a preset step value and to be in abutment with a testing position of the to-be-tested pressure sensing product, a pressure sensing chip on the to-be-tested pressure sensing product reads a current pressure value, and the control module judges whether the current pressure value is the same as the preset pressure value. If yes, the testing is passed. The testing device has a simple structure and can realize testing of the pressure sensing product without expensive equipment and instruments, realize testing of the pressure sensing product in a low-cost manner, realize testing with different precisions by combination of different hitting pieces and the second driver, adapt to testing requirements of different environments, and automatically complete the testing, thereby requiring a lower proficiency of the operator. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 It is a structural schematic view of the testing device of the pressure sensing product according to an embodiment of the present application.

[0037] Figure 2 It is a structural schematic view of the testing device of the pressure sensing product according to an embodiment of the present application. Figure 1 It is a structural schematic view of the moving assembly of the testing device of the pressure sensing product according to an embodiment of the present application.

[0038] Figure 3 It is a flowchart of the testing method of the pressure sensing product according to an embodiment of the present application. DETAILED DESCRIPTION

[0039] For the above purposes, features and advantages of the present application to be more apparent and understandable, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, a number of specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a number of different manners other than those described herein, and it is understood that similar modifications of this specification can be made by those skilled in the art in the spirit of the present application, and therefore the present application is not limited to the specific embodiments disclosed below.

[0040] It should be noted that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements can be present. In contrast, when an element is referred to as being "directly connected" to another element, there are no intervening elements present.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this description, the singular forms "a", "an" and "the" include plural references unless the context clearly dictates otherwise. The term "and / or" includes any and all combinations of one or more of the associated listed items.

[0042] As shown in Figure 1 , Figure 2 A testing device for pressure-sensitive products, comprising a support base 1, a pressure-sensitive product placing seat 2, a support frame assembly 3, a first driver 4, a second driver 5, a pressure sensor 6, a striking piece 7, the pressure-sensitive product placing seat 2 and the support frame assembly 3 are respectively installed at two ends of the support base 1, the support frame assembly 3 comprises a support frame 31, a guide shaft 32 and a workbench 33, the support frame 31 and the guide shaft 32 are respectively installed on the support base 1, the first driver 4 is installed on the support base 1 and is fixedly connected with the workbench 33 at the other end, the workbench 33 is driven by the first driver 4 to slide along the support frame 31, the second driver 5 is installed on the workbench 33, the pressure sensor 6 is installed on the second driver 5, and the striking piece 7 is installed on the pressure sensor 6 and corresponds to the pressure-sensitive product placing seat 2 in the vertical direction.

[0043] The first driver 4 is a pneumatic cylinder, and the second driver 5 is a stepping motor. The first driver 4 has a mounting plate 41 which is detachably connected to the workbench 33 and is mounted on the telescopic rod of the first driver 4. The first driver 4 controls the telescopic rod to move, and the workbench 33 is driven to move along the vertical direction by the mounting plate 41 to adjust the workbench 33 to the preset height. The pressure sensor 6 sets the pressure value suitable for the test component according to the test component. The striking member 7 can be replaced according to different test products, so that the applicability of the device is more extensive.

[0044] When the pressure-sensitive product needs to be tested, the pressure-sensitive product to be tested is placed on the pressure-sensitive product placing seat 2, the preset pressure value is set on the pressure sensor 6 according to the test component, the second driver 5 controls the striking member 7 to press down by the preset stepping value and abut against the test position of the pressure-sensitive product to be tested according to the preset pressure value, the pressure-sensitive chip on the pressure-sensitive product to be tested reads the current pressure value, and the control module judges whether the current pressure value is the same as the preset pressure value. If they are the same, the test is passed. If they are not the same, it is judged whether the current pressure value is less than the preset threshold value set on the control module. If the current pressure value is less than the preset threshold value, it is considered that the adhesion of the pressure-sensitive chip of the pressure-sensitive product to be tested is abnormal, and the control module feeds back an error message to the upper computer. If the current pressure value is greater than the preset threshold value and less than the preset pressure value, the control module feeds back to the upper computer that the device needs to be calibrated.

[0045] In this way, the test device of the pressure-sensitive product is provided with the support base 1, the pressure-sensitive product placing seat 2, the support frame assembly 3, the first driver 4, the second driver 5, the pressure sensor 6, and the striking member 7. The pressure sensor 6 can set the preset pressure value, the second driver 5 controls the striking member 7 to press down by the preset stepping value and abut against the test position of the pressure-sensitive product to be tested according to the preset pressure value, the pressure-sensitive chip on the pressure-sensitive product to be tested reads the current pressure value, and the control module judges whether the current pressure value is the same as the preset pressure value. If they are the same, the test is passed. The test device has a simple structure and can realize the test of the pressure-sensitive product without expensive equipment and instruments, realize the test of the pressure-sensitive product in a low-cost manner, realize the test of different precision through the combination of different striking members 7 and the second driver 5, adapt to the test requirements of different environments, and automatically complete the test, so that the requirement for the proficiency of the operator is low.

[0046] In one of the embodiments, in order to complete the test of multiple components of the pressure-sensitive product on the same device, the test device of the pressure-sensitive product further comprises a moving assembly 8, the moving assembly 8 comprises a third driver 81, a limiting seat 82, a moving plate 83, a sliding rail 84 and a sliding block 85, the sliding rail 84, the limiting seat 82 and the third driver 81 are respectively installed on the workbench 33, one end of the moving plate 83 is installed on the sliding block 85, and the other end is fixedly connected with the third driver 81; the limiting seat 82 is provided with a limiting groove 821, and one end of the moving plate 83 slides in the limiting groove 821; and the third driver 81 is a pneumatic cylinder.

[0047] When it is necessary to test different components of the pressure-sensitive product, the third driver 81 is started, the third driver 81 controls the moving plate 83 to move on the limiting seat 82, to drive the second driver 5, the pressure sensor 6 and the striking piece 7 to move to a preset position, so that the striking piece 7 corresponds to the component to be tested of the pressure-sensitive product in the vertical direction, and the test of different components of the pressure-sensitive product can be completed, and the test efficiency is higher.

[0048] A test method of a pressure-sensitive product, applied to the test method in the test device of the pressure-sensitive product, the method comprises:

[0049] S1, placing a pressure-sensitive product to be tested on the pressure-sensitive product placing seat 2; and making the component to be tested of the pressure-sensitive product correspond to the striking piece 7 in the vertical direction;

[0050] S2, driving the workbench 33 to a preset position by the first driver 5;

[0051] S3, setting a preset pressure value by the pressure sensor 6 and sending the preset pressure value to the control module; the control module converts the preset pressure value into a step value and sends the step value to the second driver 5;

[0052] S4, controlling the striking piece 7 to press down a preset step value and abut against the test position of the pressure-sensitive product to be tested according to the preset pressure value by the second driver 5;

[0053] S5, reading an actual pressure value by the pressure-sensitive chip of the pressure-sensitive product to be tested and sending the actual pressure value to the control module;

[0054] S6, judging whether the fit degree of the pressure-sensitive chip of the pressure-sensitive product to be tested is normal according to the preset pressure value and the actual pressure value by the control module, and if yes, proceeding to the next step;

[0055] S61, the method for judging whether the fit degree of the pressure-sensitive chip of the pressure-sensitive product to be tested is normal according to the preset pressure value and the actual pressure value by the control module is:

[0056] whether the actual pressure value is greater than the preset threshold value or less than the preset pressure value, if yes, calibrating the testing device; if no, the host computer judges that the calibration fails; for example, the preset pressure value is 500 grams, and the preset threshold value is 200 grams, so the actual pressure value should also be 500 grams under normal circumstances, if the actual pressure value is 300 grams, it proves that the pressure value is inaccurate at this time, and the device needs to be calibrated; if the actual pressure value is 100 grams, the adhesion of the pressure sensor chip is abnormal, and the host computer judges that the calibration fails, and the to-be-tested pressure sensing product needs to be checked.

[0057] S7, judging whether the testing device needs to be calibrated, if yes, proceeding to the next step;

[0058] S8, calibrating the testing device.

[0059] The method for calibrating the testing device is:

[0060] S81, moving the striking head 7 to a position (origin) above the to-be-tested key but not in contact with the to-be-tested key;

[0061] S82, controlling the striking head 7 to press down by a preset step value (for example, 500 steps);

[0062] S83, obtaining the current pressure value (for example, 50 grams) of the pressure sensor 6 at this time;

[0063] S84, calculating the compensation step value: ΔS=(set pressure value-current pressure value) / pressure calibration coefficient, the pressure calibration coefficient=pressure value corresponding to each step; for example, the set pressure value is 500 grams, the current pressure value is 50 grams, and the pressure calibration coefficient is 0.1 gram / step;

[0064] S85, lifting the striking head to the origin, and then pressing down by the newly calculated step value.

[0065] New step value=500+(500-50) / 0.1=5000

[0066] In one embodiment, when the current pressure value of the pressure sensor at this time is obtained, the current pressure value can be obtained continuously for a preset number of times, and whether the difference between the first current pressure value and the next current pressure value is less than a preset threshold value is judged, if yes, the data is considered valid, if no, resampling.

[0067] In this way, for example, the preset threshold value is 1 gram, if the difference>1 gram: resample, if the difference≤1 gram: the data is valid, so that the calibration accuracy is higher.

[0068] For example, the first fine adjustment: bias calculation: ΔF = target value - current value (e.g. 500-504 = -4 grams) Calculate the number of steps needed to adjust -4 / 0.1 = -40 steps, new position 5000-40 = 4960 steps.

[0069] Second fine adjustment: measured 499.5 grams, calculate the number of steps needed to adjust 0.5 / 0.1 = 5 steps, new position 4960+5 = 4965 steps, reach the target accuracy (error 0.5 grams <1 gram).

[0070] The above-described embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it should not be understood as limiting the scope of the application. It should be noted that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of the present application. Therefore, the scope of protection of the present application should be subject to the appended claims.

Claims

1. A testing device for pressure-sensitive products, characterized in that: The device includes a support base, a pressure-sensitive product placement seat, a support frame assembly, a first driver, a second driver, a pressure sensor, and an impact component. The pressure-sensitive product placement seat and the support frame assembly are respectively installed at both ends of the support base. The support frame assembly includes a bracket, a guide shaft, and a worktable. The bracket and the guide shaft are respectively installed on the support base. The first driver is installed on the support base, and its other end is fixedly connected to the worktable. The worktable is driven by the first driver to slide along the bracket. The second driver is installed on the worktable. The pressure sensor is installed on the second driver. The impact component is installed on the pressure sensor and corresponds vertically to the pressure-sensitive product placement seat.

2. The testing device for pressure-sensitive products according to claim 1, characterized in that: The first driver has a mounting plate that is detachably connected to the worktable.

3. The testing device for pressure-sensitive products according to claim 1, characterized in that: The testing device for the pressure-sensitive product also includes a moving component, which includes a third driver, a limiting seat, a moving plate, a slide rail, and a slider. The slide rail, the limiting seat, and the third driver are respectively mounted on the worktable. One end of the moving plate is mounted on the slider, and the other end is fixedly connected to the third driver.

4. The testing device for pressure-sensitive products according to claim 3, characterized in that: The limiting seat has a limiting groove, and one end of the moving plate slides in the limiting groove.

5. The testing device for pressure-sensitive products according to claim 3, characterized in that: The first driver and the third driver are cylinders.

6. The testing device for pressure-sensitive products according to claim 1, characterized in that: The second driver is a stepper motor.

Images