A test device based on differential sensor sensitivity

Abstract

The utility model provides a kind of test device based on differential sensor sensitivity belongs to and differential sensor technical field.The device includes test table, support and clamping assembly, support is vertically set on test table, one clamping assembly is respectively arranged in the two sides of support, clamping assembly includes slide base, double-end reverse tooth screw rod, nut seat and jaw, installation groove is opened in slide base, double-end reverse tooth screw rod is rotatably set in installation groove, nut seat is provided with two, respectively with the thread connection of two ends of double-end reverse tooth screw rod, jaw is provided with two, respectively fixed in the top of two nut seats.The test device based on differential sensor sensitivity provided by the utility model embodiment can solve the problem of complex operation and low test efficiency in the prior art.

Description

Technical Field

[0001] This utility model relates to the field of differential sensor technology, and in particular to a testing device based on the sensitivity of a differential sensor. Background Technology

[0002] A differential sensor is a device that measures signals by detecting the difference between two related measurement points. Its core principle involves using two matched sensing units to acquire the target signal and a reference signal respectively, and then calculating the difference between them through circuitry. This effectively suppresses common-mode interference and highlights the true changes in the measured signal. Compared to single-channel sensors, differential sensors offer advantages in anti-interference capability and measurement accuracy, and are widely used in communication and electronic testing fields. Before being deployed, differential sensors require sensitivity testing to meet market demands.

[0003] In existing technologies, sensitivity testing of differential sensors typically employs specialized differential measurement equipment (such as differential probes or differential amplifiers). These measurement devices are complex to operate and costly, resulting in long operation times and low testing efficiency when conducting large-scale testing.

[0004] Existing differential sensor testing devices are relatively complex to operate, resulting in long operation times and low testing efficiency when conducting large-scale tests. Utility Model Content

[0005] This invention provides a testing device based on differential sensor sensitivity, which solves the problems of complex operation and low testing efficiency in the prior art. The technical solution is as follows:

[0006] A testing device based on differential sensor sensitivity includes: a test stage, a support, and a clamping assembly.

[0007] The support is vertically mounted on the test bench. A clamping assembly is located on each side of the support. Each clamping assembly includes a slide, a double-ended reverse-threaded screw, a nut seat, and grippers. The slide has a mounting groove, and the double-ended reverse-threaded screw is rotatably mounted within the mounting groove. Two nut seats are provided, each threadedly connected to both ends of the double-ended reverse-threaded screw. Two grippers are provided, each fixed to the top of one of the two nut seats. A vibration assembly is installed inside the test bench to provide vibrations with different acceleration values.

[0008] Optionally, a knob is provided at one end of the double-ended reverse-threaded screw.

[0009] Optionally, the two clamping components are a first clamping component and a second clamping component, and a fixing plate is provided at the bottom of the first clamping component, the fixing plate being fixedly connected to the side wall of the bracket.

[0010] Optionally, the assembly also includes a guide rail and a slider, the guide rail being arranged vertically on the bracket, the slider being slidably disposed on the guide rail, and the second clamping assembly being fixedly connected to the slider.

[0011] Optionally, the bottom of the second clamping assembly is provided with a locking assembly, which includes a fixing strip and a locking screw. The fixing strip is disposed against the side wall of the bracket, and a threaded hole is provided on the fixing strip. The locking screw passes through the threaded hole and abuts against the side wall of the bracket.

[0012] Optionally, the test platform and the glass cover are also included. The test platform and the glass cover are disposed on the base, and the glass cover is disposed outside the test platform. A pressure regulating valve is disposed on the top of the glass cover, and the pressure regulating valve is used to adjust the air pressure inside the glass cover.

[0013] Optionally, the base is provided with a locking groove, and the bottom of the glass cover is provided with a mounting protrusion that matches the locking groove.

[0014] Optionally, a fixing ring is provided around the bottom periphery of the glass cover, the fixing ring is in contact with the upper surface of the base, and a voltage stabilizing component is provided around the base, the voltage stabilizing component being used to press the fixing ring tightly onto the base.

[0015] Optionally, the voltage stabilizing assembly includes a rotating pile, a rotating column, and an eccentric block. The rotating pile is vertically and rotatably mounted on the base, the rotating column is horizontally and rotatably mounted on the rotating pile, and the eccentric block is located at one end of the rotating column, with the eccentric block abutting against the top surface of the fixing ring.

[0016] Optionally, a handle is provided at the other end of the rotating column.

[0017] The beneficial effects of the technical solution provided by this utility model embodiment include at least the following:

[0018] This invention provides a testing device based on differential sensor sensitivity. The test platform provides bottom support for the bracket, and the clamping assembly provides support for the sensor under test and the standard sensor. Rotating the double-ended reverse-threaded screw allows the two grippers to move closer or further apart, facilitating the clamping and fixing of the sensor. This enables quick and convenient relative fixation of the sensor under test and the standard sensor. The test platform provides acceleration values ​​to both sensors, and the output voltage or voltage ratio of the sensor under test and the standard accelerometer are recorded. The differential voltage or related parameters are calculated, and the differential voltage is obtained from the difference between the measurement results of the two sensors. This device has a simple structure and is easy to operate, effectively solving the problems of complex operation and low testing efficiency in existing technologies. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure provided in an embodiment of the present utility model;

[0021] Figure 2 This is a schematic diagram of the overall structure after removing the glass cover, provided in an embodiment of this utility model;

[0022] Figure 3 This is a schematic diagram of the clamping assembly and bracket provided in this embodiment of the utility model;

[0023] Figure 4 This is a schematic diagram of the clamping component structure provided in an embodiment of the present utility model;

[0024] Figure 5 This is a schematic diagram of the glass cover and base provided in an embodiment of the present utility model.

[0025] In the diagram: 1-Test stand; 2-Bracket; 3-Clamping assembly; 301-First clamping assembly; 302-Second clamping assembly; 31-Slide; 311-Mounting slot; 32-Double-ended reverse threaded screw; 33-Nut seat; 34-Claw; 35-Knob; 36-Fixing plate; 37-Locking assembly; 371-Fixing strip; 372-Locking screw; 4-Guide rail; 5-Slider; 6-Base; 61-Locking slot; 7-Glass cover; 71-Pressure regulator; 72-Mounting protrusion; 73-Fixing ring; 8-Pressure regulator assembly; 81-Rotating post; 82-Rotating column; 83-Eccentric block; 84-Handle. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0027] Figure 1 This is a schematic diagram of the overall structure provided in an embodiment of the present utility model; Figure 2 This is a schematic diagram of the overall structure after removing the glass cover, provided in an embodiment of this utility model; Figure 3 This is a schematic diagram of the clamping assembly and bracket provided in this embodiment of the utility model; Figure 4 This is a schematic diagram of the clamping component structure provided in an embodiment of the present utility model; Figure 5This is a schematic diagram showing the fit between the glass cover and the base provided in an embodiment of this utility model. Figures 1 to 5 The device shown is a test apparatus based on differential sensor sensitivity, comprising: a test platform 1, a support 2, and a clamping assembly 3. The support 2 is vertically mounted on the test platform 1, and a clamping assembly 3 is provided on each side of the support 2. The clamping assembly 3 includes a slide 31, a double-ended reverse-threaded screw 32, a nut seat 33, and a gripper 34. The slide 31 has a mounting groove 311, and the double-ended reverse-threaded screw 32 is rotatably mounted in the mounting groove 311. There are two nut seats 33, which are threaded to the two ends of the double-ended reverse-threaded screw 32 respectively. There are two grippers 34, which are fixed to the top of the two nut seats 33 respectively. A vibration assembly is provided in the test platform 1 to provide vibrations with different acceleration values.

[0028] Exemplarily, in this embodiment of the present invention, the test bench 1 can provide acceleration for testing the components on it and can provide bottom support for the bracket 2. The two clamping components 3 can stably fix the sensor under test and the standard sensor on both sides of the bracket 2 respectively. The slide 31 provides support for the double-ended reverse thread screw 32, allowing it to rotate freely in the mounting groove 311. The two nut seats 33 are respectively set on opposite threads on both sides of the double-ended reverse thread screw 32. When the double-ended reverse thread screw 32 is rotated, the nut seats 33 on both sides will move closer or further away from each other, thereby driving the two grippers 34 to move relative to each other. The side of the two grippers 34 that moves closer to each other can be set into an arc structure to adapt to the surface of the sensor, so that the grippers 34 can clamp and fix the sensor more stably. After the sensor under test and the standard sensor are fixed on the bracket 2, the test bench 1 is started to provide the sensor with an acceleration value of 80Hz and 2g. The output voltage or voltage ratio of the sensor under test and the standard accelerometer are recorded. The differential signal is approximated by using two single-ended measurements. The first measurement measures the voltage or related parameters between the positive terminal +OUT of the signal and the reference point (GND or reference source), and records them as follows. Second measurement: Measure the voltage or related parameters between the negative terminal -OUT of the signal and the reference point (GND or reference source), denoted as... Calculate the differential voltage or related parameters; obtain the differential voltage from the difference between two measurements. = - Repeatability test: Measure five times under the same conditions and calculate the standard deviation. This device does not require a dedicated differential probe or instrument and is suitable for test systems without a differential signal measurement unit. It is suitable for situations where differential measurement equipment cannot be purchased, the test system lacks a differential signal measurement unit, or low precision requirements or high precision verification are needed. This method can be used for rapid testing and verification of batch differential signals. It is simple and convenient to operate, enabling rapid sensitivity testing and improving testing efficiency.

[0029] This utility model provides a testing device based on differential sensor sensitivity. The test platform 1 provides bottom support for the bracket 2, and the clamping assembly 3 provides support for the sensor under test and the standard sensor. Rotating the double-ended reverse-threaded screw 32 allows the two grippers 34 to move closer or further apart, facilitating the clamping and fixing of the sensor. This allows for quick and convenient relative fixing of the sensor under test and the standard sensor. The test platform 1 provides acceleration values ​​to the sensor under test and the standard sensor, recording the output voltage or voltage ratio of the sensor under test and the standard accelerometer. The differential voltage or related parameters are calculated, and the differential voltage is obtained from the difference between the measurement results of the two sensors. This device has a simple structure and is easy to operate, effectively solving the problems of complex operation and low testing efficiency in existing technologies.

[0030] Optionally, a knob 35 is provided at one end of the double-ended reverse threaded screw 32.

[0031] Exemplary, in embodiments of this utility model, such as Figure 4 As shown, the knob 35 allows operators to easily rotate the double-ended reverse-threaded screw 32, thus improving the ease of operation of the device. Alternatively, a motor can be installed at the end of the double-ended reverse-threaded screw 32 to electrically control it, thereby increasing the automation level of the device.

[0032] Optionally, the two clamping components 3 are a first clamping component 301 and a second clamping component 302, respectively. The bottom of the first clamping component 301 is provided with a fixing plate 36, which is fixedly connected to the side wall of the bracket 2.

[0033] Exemplary, in embodiments of this utility model, such as Figure 2 As shown, a standard sensor is set on the first clamping assembly 301, and the sensor to be tested is set on the second clamping assembly 302. A fixing plate 36 is set at the bottom of the first clamping assembly 301 to provide bottom support for the first clamping assembly 301, thereby improving the stability of the device.

[0034] Optionally, it also includes a guide rail 4 and a slider 5. The guide rail 4 is arranged vertically on the bracket 2, and the slider 5 is slidably disposed on the guide rail 4. The second clamping assembly 302 is fixedly connected to the slider 5.

[0035] Exemplary, in embodiments of this utility model, such as Figure 2 and Figure 3As shown, by setting the guide rail 4 and the slider 5, the second clamping assembly 302 can slide along the guide rail 4, thereby adjusting the relative position between the sensor under test and the standard sensor, so that the sensitive axes of the standard accelerometer and the sensor under test coincide and are parallel to the vibration direction, making the detected data more accurate, thereby improving the accuracy of the test results of this device.

[0036] Optionally, the bottom of the second clamping assembly 302 is provided with a locking assembly 37, which includes a fixing strip 371 and a locking screw 372. The fixing strip 371 is disposed in close contact with the side wall of the bracket 2, and a threaded hole is provided on the fixing strip 371. The locking screw 372 passes through the threaded hole and abuts against the side wall of the bracket 2.

[0037] Exemplary, in embodiments of this utility model, such as Figure 2 and Figure 3 As shown, after the height of the second clamping assembly 302 is adjusted, the locking screw 372 is tightened by passing it through the threaded hole, so that the fixing strip 371 is fixed on the bracket 2. The upper surface of the fixing strip 371 abuts against the lower surface of the slide 31, thereby preventing the slide 31 from sliding down, thus fixing the height of the sensor to be tested. By setting this structure, the operation is simple and the height of the sensor to be tested can be fixed, further improving the ease of operation of this device.

[0038] Optionally, it also includes a base 6 and a glass cover 7. The test bench 1 and the glass cover 7 are mounted on the base 6, and the glass cover 7 covers the outside of the test bench 1. A pressure regulating valve 71 is provided on the top of the glass cover 7, and the pressure regulating valve 71 is used to adjust the air pressure inside the glass cover 7.

[0039] Exemplary, in embodiments of this utility model, such as Figure 1 and Figure 5 As shown, by setting a glass cover 7 to enclose the test bench 1, the interior of the glass cover 7 becomes a sealed space. By adjusting the pressure regulating valve 71, the air pressure inside the glass cover 7 can be adjusted. In this embodiment, the test environment inside the glass cover 7 is adjusted to a standard atmospheric pressure, thus enabling the device to be used in different air pressure environments, thereby improving the versatility of the device. When sensitivity tests are required under different air pressure environments, the air pressure inside the glass cover 7 can also be adjusted by adjusting the pressure regulating valve 71 to meet the test conditions, thereby enabling tests under different air pressure conditions.

[0040] Optionally, the base 6 is provided with a locking groove 61, and the bottom of the glass cover 7 is provided with a mounting protrusion 72 that matches the locking groove 61.

[0041] Exemplary, in embodiments of this utility model, such as Figure 1 and Figure 5As shown, by setting the locking groove 61 and the mounting protrusion 72 to cooperate, the glass cover 7 can be more stably fixed to the base 6. A sealing structure such as a sealing ring can also be set between the locking groove 61 and the mounting protrusion 72 to ensure the airtightness of the glass cover 7.

[0042] Optionally, a fixing ring 73 is provided on the bottom periphery of the glass cover 7, the fixing ring 73 is in contact with the upper surface of the base 6, and a voltage stabilizing component 8 is provided on the periphery of the base 6, the voltage stabilizing component 8 is used to press the fixing ring 73 onto the base 6.

[0043] Exemplary, in embodiments of this utility model, such as Figure 1 and Figure 5 As shown, the retaining ring 73 protrudes from the periphery of the glass cover 7 and is located above the mounting protrusion 72. When the locking groove 61 and the mounting protrusion 72 are engaged, the lower surface of the retaining ring 73 abuts against the upper surface of the base 6. Then, by adjusting the pressure stabilizing component 8, the retaining ring 73 is pressed firmly onto the base 6, making the connection between the glass cover 7 and the base more stable and further ensuring the airtightness of the glass cover 7. The pressure stabilizing component 8 can be in the form of a pressure block or a snap-fit, as long as it has the structural form to press the retaining ring 73 firmly onto the base 6.

[0044] Optionally, the voltage stabilizing assembly 8 includes a rotating pile 81, a rotating column 82, and an eccentric block 83. The rotating pile 81 is vertically and rotatably mounted on the base 6, the rotating column 82 is horizontally and rotatably mounted on the rotating pile 81, and the eccentric block 83 is located at one end of the rotating column 82, and the eccentric block 83 abuts against the top surface of the fixing ring 73.

[0045] Exemplary, in embodiments of this utility model, such as Figure 1 and Figure 5 As shown, the eccentric block 83 can be an elliptical structure. The rotating stake 81 is rotatably mounted on the base 6, allowing the rotating stake 81 to adjust the horizontal position of the eccentric block 83 by rotating its direction. This allows for clearance during installation of the glass cover 7 and the base 6. After the glass cover 7 and the base 6 are installed, rotating the rotating stake 81 positions the eccentric block 83 above the fixing ring 73. At this point, rotating the rotating column 82 causes the long axis of the eccentric block 83 to abut against the fixing ring 73, thus pressing the fixing ring 73 firmly onto the base 6 and improving the airtightness of the glass cover 7. By configuring the voltage stabilizing component 8 with this structure, the structure is simple and the operation is convenient. The operation of pressing the fixing ring 73 onto the base 6 can be completed with two rotations, further improving the ease of operation of this device.

[0046] Optionally, a handle 84 is provided at the other end of the rotating column 82.

[0047] Exemplary, in embodiments of this utility model, such as Figure 1 and Figure 5 As shown, by providing a handle 84 perpendicular to the rotating column 82 at the other end of the rotating column 82, the rotating column 82 can be rotated by operating the handle 84. This design increases the rotational lever arm, making the rotating column 82 easier to rotate, thereby further improving the ease of operation of this device. The handle 84 can be a columnar structure or a disc-shaped structure; any structural form that increases the rotational lever arm of the rotating column 82 can be used as the handle 84 of this device.

[0048] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains. The terms “first,” “second,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “an” or “a” and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms “comprising” or “including” and similar terms mean that the elements or objects preceding “comprising” or “including” encompass the elements or objects listed following “comprising” or “including” and their equivalents, and do not exclude other elements or objects. The terms “connected” or “linked” and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms “upper,” “lower,” “left,” and “right” are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0049] The above description is only an optional embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A testing device based on the sensitivity of a differential sensor, characterized in that, include: Test stand (1), bracket (2) and clamping assembly (3). The bracket (2) is vertically mounted on the test bench (1). A clamping assembly (3) is provided on each side of the bracket (2). The clamping assembly (3) includes a slide (31), a double-ended reverse threaded screw (32), a nut seat (33), and a jaw (34). The slide (31) has an installation groove (311). The double-ended reverse threaded screw (32) is rotatably mounted in the installation groove (311). There are two nut seats (33), which are threaded to both ends of the double-ended reverse threaded screw (32). There are two jaws (34), which are fixed to the top of the two nut seats (33). A vibration assembly is provided in the test bench (1) to provide vibrations with different acceleration values.

2. The testing device based on differential sensor sensitivity according to claim 1, characterized in that, A knob (35) is provided at one end of the double-ended reverse thread screw (32).

3. The testing device based on differential sensor sensitivity according to claim 1, characterized in that, The two clamping components (3) are a first clamping component (301) and a second clamping component (302), respectively. The bottom of the first clamping component (301) is provided with a fixing plate (36), which is fixedly connected to the side wall of the bracket (2).

4. The testing device based on differential sensor sensitivity according to claim 3, characterized in that, It also includes a guide rail (4) and a slider (5), the guide rail (4) being arranged vertically on the bracket (2), the slider (5) being slidably disposed on the guide rail (4), and the second clamping assembly (302) being fixedly connected to the slider (5).

5. The testing device based on differential sensor sensitivity according to claim 4, characterized in that, The second clamping assembly (302) is provided with a locking assembly (37) at the bottom. The locking assembly (37) includes a fixing strip (371) and a locking screw (372). The fixing strip (371) is fitted to the side wall of the bracket (2). The fixing strip (371) has a threaded hole. The locking screw (372) passes through the threaded hole and abuts against the side wall of the bracket (2).

6. The testing device based on differential sensor sensitivity according to claim 1, characterized in that, It also includes a base (6) and a glass cover (7). The test platform (1) and the glass cover (7) are set on the base (6). The glass cover (7) covers the outside of the test platform (1). A pressure regulating valve (71) is provided on the top of the glass cover (7). The pressure regulating valve (71) is used to adjust the air pressure inside the glass cover (7).

7. The testing device based on differential sensor sensitivity according to claim 6, characterized in that, The base (6) is provided with a locking groove (61), and the bottom of the glass cover (7) is provided with an installation protrusion (72) that matches the locking groove (61).

8. The testing device based on differential sensor sensitivity according to claim 7, characterized in that, A fixing ring (73) is provided on the bottom periphery of the glass cover (7). The fixing ring (73) is in contact with the upper surface of the base (6). A voltage stabilizing component (8) is provided on the periphery of the base (6). The voltage stabilizing component (8) is used to press the fixing ring (73) onto the base (6).

9. The testing device based on differential sensor sensitivity according to claim 8, characterized in that, The voltage stabilizing component (8) includes a rotating pile (81), a rotating column (82), and an eccentric block (83). The rotating pile (81) is vertically and rotatably mounted on the base (6). The rotating column (82) is horizontally and rotatably mounted on the rotating pile (81). The eccentric block (83) is located at one end of the rotating column (82) and abuts against the top surface of the fixing ring (73).

10. A testing device based on differential sensor sensitivity according to claim 9, characterized in that, A handle (84) is provided at the other end of the rotating column (82).

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