Pressure sensor test fixture and test device

Abstract

The utility model relates to the technical field of test equipment, and specifically discloses a pressure sensor test tool and a test device, comprising a tool pedestal used for placing a pressure sensor to be tested; the elastic pressure applying assembly is arranged above the jig base in a sliding manner, and the elastic pressure applying assembly is driven to downwards press the pressure sensor; the elastic pressure applying assembly comprises a pressure applying top plate, a pressure applying bottom plate arranged below the pressure applying top plate in a sliding mode, a distance adjusting assembly used for continuously adjusting the distance between the pressure applying top plate and the pressure applying bottom plate, and an elastic component driving the pressure applying bottom plate to slide downwards relative to the pressure applying top plate. The pressure sensor test fixture and the test device provided by the utility model can effectively solve the problem that diversified test requirements cannot be met due to the fact that the test pressure of the existing test device is discontinuous.

Description

Technical Field

[0001] The utility model relates to the technical field of testing equipment, in particular to a pressure sensor testing fixture and a testing device. Background Technique

[0002] Today, with the rapid development of modern industry and technology, pressure sensors are increasingly widely used, almost covering all fields. From high-precision pressure monitoring in aerospace to tire pressure detection in automobile manufacturing; from pipeline pressure control in petrochemical industry to blood pressure measurement in medical equipment, pressure sensors play a crucial role.

[0003] However, to ensure the accuracy, reliability and stability of pressure sensors, professional pressure sensor testing fixtures and testing devices are indispensable. Existing testing devices mainly achieve the functional testing of pressure sensors by placing weights on the pressure sensors to be tested. Such a testing method has the following problems:

[0004] Although weights of various specifications can be set to meet various pressure requirements, however, no matter how many specifications of weights are set, the test pressures obtained by combining multiple weights are still discontinuous. For example, if the smallest specification of weight is 10N, the test pressure can only use every 10g as the smallest interval unit, that is, the test pressure can be 250N, 260N, 270N, but test pressures of 255N or 264N cannot be obtained.

[0005] Therefore, it is necessary to improve the existing testing device to solve the problem that the test pressure is discontinuous and cannot meet the diverse testing requirements.

[0006] The above information disclosed in this background section is only included to enhance the understanding of the background of the present disclosure, and thus may include information that does not form the prior art already known to those of ordinary skill in the art. Summary of the Utility Model

[0007] An object of the utility model is to provide a pressure sensor testing fixture and a testing device, which can effectively solve the problem that the test pressure of the existing testing device is discontinuous and cannot meet the diverse testing requirements.

[0008] To achieve the above object, on the one hand, the utility model provides a pressure sensor testing fixture, including:

[0009] A fixture base for placing the pressure sensor to be tested;

[0010] An elastic pressing assembly, which is slidably arranged above the fixture base and presses the pressure sensor downward after being driven; wherein, the elastic pressing assembly includes a pressing top plate, a pressing bottom plate slidably arranged below the pressing top plate, a distance adjusting assembly for continuously adjusting the distance between the pressing top plate and the pressing bottom plate, and an elastic member for driving the pressing bottom plate to slide downward relative to the pressing top plate.

[0011] Optionally, the elastic pressing assembly further includes:

[0012] A first guiding column, the upper end of which slidably passes through the pressing top plate and the lower end is fixedly installed on the pressing bottom plate.

[0013] Optionally, the distance adjusting assembly includes a plurality of adjusting bolts;

[0014] The adjusting bolts pass through the pressing top plate downward from the upper direction of the pressing top plate and are threadedly connected to the pressing bottom plate.

[0015] Optionally, the pressing top plate is provided with a head accommodating groove located at the top surface position of the pressing top plate and a through rod groove penetrating downward from the bottom of the head accommodating groove through the pressing top plate.

[0016] Optionally, the adjusting bolts sequentially include a bolt head located in the head accommodating groove, a smooth rod portion passing through the through rod groove, and a screw rod portion threadedly connected to the pressing bottom plate from top to bottom.

[0017] Optionally, the diameter of the through rod groove is smaller than the diameter of the bolt head to limit the bolt head from passing through the through rod groove.

[0018] Optionally, the number of the adjusting bolts is four, and one adjusting bolt is correspondingly arranged at each vertex angle of the pressing bottom plate.

[0019] Optionally, the elastic member is a compression spring, and the elastic member is sleeved on the smooth rod portion.

[0020] Optionally, it further includes:

[0021] A second guiding column, the upper end of which slidably passes through the pressing top plate and the lower end is fixedly installed on the fixture base.

[0022] On the other hand, a testing device is provided, which includes any one of the pressure sensor testing fixtures and a downward pressing linear driving mechanism for driving the elastic pressing assembly of the pressure sensor testing fixture to press the pressure sensor to be tested downward.

[0023] The beneficial effects of the present utility model are as follows: A pressure sensor test fixture and a test device are provided. When it is necessary to test a pressure sensor, the pressure sensor to be tested is placed in the fixture base, and then the elastic pressure application component is driven downward by the downward linear drive mechanism to tightly press the pressure sensor to be tested, so as to apply pressure to the pressure sensor, and then complete the test operation of the pressure sensor;

[0024] It should be noted that the downward driving stroke of the downward linear drive mechanism is fixed. Therefore, when the downward linear drive mechanism drives the elastic pressure application component to tightly press the pressure sensor to be tested, the pressure applied by the pressure application bottom plate to the pressure sensor to be tested is fixed;

[0025] Furthermore, when it is necessary to adjust the pressure applied by the pressure application bottom plate to the pressure sensor to be tested, the distance adjustment component can be adjusted to change the distance between the pressure application top plate and the pressure application bottom plate. For example, when the distance between the pressure application top plate and the pressure application bottom plate decreases, under the same downward driving stroke, the pressure applied by the pressure application bottom plate to the pressure sensor will decrease; conversely, when the distance between the pressure application top plate and the pressure application bottom plate increases, under the same downward driving stroke, the pressure applied by the pressure application bottom plate to the pressure sensor will increase. Since the distance adjustment component can continuously adjust the distance between the pressure application top plate and the pressure application bottom plate, the pressure applied by the pressure application bottom plate to the pressure sensor is also continuously adjustable.

[0026] Therefore, the pressure sensor test fixture and the test device provided by the present utility model can effectively solve the problem that the test pressure of the existing test device is discontinuous, resulting in the inability to meet diverse test requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0028] Figure 1 Structural schematic diagram of the test device provided for the embodiment;

[0029] Figure 2 Structural schematic diagram of the pressure sensor test fixture provided for the embodiment.

[0030] In the figure:

[0031] 100, pressure sensor test fixture; 200, downward linear drive mechanism;

[0032] 1, fixture base;

[0033] 2. Elastic pressure - applying assembly; 201. Pressure - applying top plate; 2011. Head accommodation groove; 2012. Rod - passing groove; 202. Pressure - applying bottom plate; 203. Distance - adjusting assembly; 2031. Bolt head; 2032. Smooth rod part; 2033. Screw rod part; 204. Elastic member; 205. First guiding column;

[0034] 3. Second guiding column. Detailed implementation manners

[0035] In the present utility model, referring to "embodiment" means that specific features, structures or characteristics described in combination with the embodiment can be included in at least one embodiment of the present utility model. The term "embodiment" appearing at various positions in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or relevance to other embodiments. In principle, in the present utility model, as long as there is no technical contradiction or conflict, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0036] Unless otherwise defined, the meanings of the technical terms used herein are the same as those commonly understood by those skilled in the technical field to which the present utility model belongs; the use of the relevant terms herein is only for describing specific embodiments, and is not intended to limit the present utility model.

[0037] In the description of the present utility model, the phrase "and / or" is an expression used to describe the logical relationship between objects, indicating that there can be three relationships. For example, A and / or B means: there is A, there is B, and there is both A and B at the same time. In addition, the character " / " in this article generally represents an "or" logical relationship between the associated objects before and after.

[0038] In the present utility model, terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual quantity, primary or secondary, or order relationship between these entities or operations.

[0039] Without more limitations, in the present utility model, the expressions such as "including", "comprising", "having" or other similar expressions used in the statements are intended to cover non - exclusive inclusion. These expressions do not exclude that there may be other elements in the process, method or product including the said elements, so that the process, method or product including a series of elements can not only include those defined elements, but also include other elements not explicitly listed, or also include elements inherent to this process, method or product.

[0040] Similar to the understanding in the "Examination Guidelines", in this utility model, expressions such as "greater than", "less than", "exceeding", etc. are understood not to include the base number; expressions such as "above", "below", "within", etc. are understood to include the base number. In addition, in the description of the embodiments of this utility model, the meaning of "a plurality of" is two or more (including two), and similar expressions related to "many" are also understood in this way, such as "multiple groups", "multiple times", etc., unless otherwise clearly and specifically defined.

[0041] In the description of the embodiments of this utility model, the space-related expressions used, such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "vertical", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the specific embodiment or the drawing, and is only for the convenience of describing the specific embodiments of this utility model or for the reader to understand, rather than indicating or implying that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, it cannot be understood as a limitation to the embodiments of this utility model.

[0042] Unless otherwise clearly specified or limited, in the description of the embodiments of this utility model, the terms such as "installed", "connected", "connected", "fixed", "set", etc. should be understood in a broad sense. For example, the "connection" can be a fixed connection, a detachable connection, or an integral setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication inside two components or the interaction relationship between two components. For those skilled in the art to which this utility model belongs, the specific meanings of the above terms in the embodiments of this utility model can be understood according to the specific situation.

[0043] This utility model provides a pressure sensor test fixture and a test device, which are applicable to the application scenario of applying pressure to a pressure sensor to complete the performance test of the pressure sensor, and can effectively solve the problem that the test pressure of the existing test device is discontinuous and cannot meet the diversified test requirements.

[0044] See Figure 1 , the test device provided in this embodiment includes a pressure sensor test fixture 100 and a downward linear driving mechanism 200.

[0045] See Figure 2, the pressure sensor test fixture 100 includes a fixture base 1 and an elastic pressing assembly 2. The fixture base 1 is used to place the pressure sensor to be tested. The elastic pressing assembly 2 is slidably disposed above the fixture base 1 and presses the pressure sensor downward after being driven; wherein, the elastic pressing assembly 2 includes a pressing top plate 201, a pressing bottom plate 202 slidably disposed below the pressing top plate 201, a distance adjusting assembly 203 for continuously adjusting the distance between the pressing top plate 201 and the pressing bottom plate 202, and an elastic member 204 for driving the pressing bottom plate 202 to slide downward relative to the pressing top plate 201.

[0046] The driving end of the downward pressing linear driving mechanism 200 is connected to the pressing top plate 201 and is used to drive the elastic pressing assembly 2 of the pressure sensor test fixture 100 to move downward close to the fixture base 1, so that the pressing bottom plate 202 presses the pressure sensor to be tested downward.

[0047] For the pressure sensor test fixture 100 and the test device provided by the present utility model, when it is necessary to test the pressure sensor, the pressure sensor to be tested is placed in the fixture base 1, and then the elastic pressing assembly 2 is driven by the downward pressing linear driving mechanism 200 to press the pressure sensor to be tested downward, so as to apply pressure to the pressure sensor, and then complete the test operation of the pressure sensor;

[0048] It should be noted that the downward driving stroke of the downward pressing linear driving mechanism 200 is fixed. Therefore, when the downward pressing linear driving mechanism 200 drives the elastic pressing assembly 2 to press the pressure sensor to be tested downward, the pressure applied by the pressing bottom plate 202 to the pressure sensor to be tested is fixed;

[0049] Furthermore, when it is necessary to adjust the pressure applied by the pressing bottom plate 202 to the pressure sensor to be tested, the distance adjusting assembly 203 can be adjusted to change the distance between the pressing top plate 201 and the pressing bottom plate 202. For example, when the distance between the pressing top plate 201 and the pressing bottom plate 202 decreases, under the same downward driving stroke, the pressure applied by the pressing bottom plate 202 to the pressure sensor will decrease; on the contrary, when the distance between the pressing top plate 201 and the pressing bottom plate 202 increases, under the same downward driving stroke, the pressure applied by the pressing bottom plate 202 to the pressure sensor will increase. Since the distance adjusting assembly 203 can continuously adjust the distance between the pressing top plate 201 and the pressing bottom plate 202, the pressure applied by the pressing bottom plate 202 to the pressure sensor is also continuously adjustable

[0050] Of course, the pressure can also be adjusted by replacing the elastic component 204 with different elastic moduli. For example, when the distance between the pressure - applying top plate 201 and the pressure - applying bottom plate 202 and the downward driving stroke are kept unchanged, selecting an elastic component 204 with a larger elastic modulus can increase the pressure applied to the pressure sensor; conversely, selecting an elastic component 204 with a smaller elastic modulus can reduce the pressure applied to the pressure sensor.

[0051] Therefore, the pressure sensor test fixture 100 and the test device provided by the present utility model can effectively solve the problem that the test pressure of the existing test device is discontinuous, resulting in the inability to meet diverse test requirements.

[0052] Optionally, the elastic pressure - applying assembly 2 further includes a first guiding column 205. The upper end of the first guiding column 205 slidably passes through the pressure - applying top plate 201, and the lower end is fixedly installed on the pressure - applying bottom plate 202. The pressure - applying bottom plate 202 slides up and down relative to the pressure - applying top plate 201 under the guiding action of the first guiding column 205, thereby ensuring the smoothness and stability of the up - and - down sliding of the pressure - applying bottom plate 202.

[0053] Furthermore, the pressure sensor test fixture 100 further includes a second guiding column 3. The upper end of the second guiding column 3 slidably passes through the pressure - applying top plate 201, and the lower end is fixedly installed on the fixture base 1. The second guiding column 3 is used to improve the smoothness of the up - and - down sliding of the elastic pressure - applying assembly 2 relative to the fixture base 1.

[0054] The following is a detailed introduction to the distance - adjusting assembly 203.

[0055] In this embodiment, the distance - adjusting assembly 203 includes a plurality of adjusting bolts. After passing downward through the pressure - applying top plate 201 from the upper direction of the pressure - applying top plate 201, the adjusting bolts are threadedly connected to the pressure - applying bottom plate 202.

[0056] Specifically, the pressure - applying top plate 201 is provided with a head receiving groove 2011 located at the top surface position of the pressure - applying top plate 201 and a rod - passing groove 2012 that penetrates downward through the pressure - applying top plate 201 from the bottom of the head receiving groove 2011.

[0057] Correspondingly, the adjusting bolt sequentially includes a bolt head 2031 located in the head receiving groove 2011, a smooth rod portion 2032 passing through the rod - passing groove 2012, and a screw portion 2033 threadedly connected to the pressure - applying bottom plate 202. Among them, the diameter of the rod - passing groove 2012 is smaller than the diameter of the bolt head 2031 to limit the bolt head 2031 from passing through the rod - passing groove 2012.

[0058] Further, the elastic member 204 is a compression spring, and the elastic member 204 is sleeved on the smooth rod portion 2032.

[0059] Generally, the elastic member 204 drives the pressure application bottom plate 202 to slide downward relative to the pressure application top plate 201 along the first guide post 205 until the bolt head 2031 abuts against the bottom of the head accommodation groove 2011, thereby restricting the further downward sliding of the pressure application bottom plate 202; at this time, the distance dimension between the pressure application bottom plate 202 and the pressure application top plate 201 is the initial distance that needs to be adjusted. If the bolt head 2031 is rotated forward, such that the length dimension of the screw rod portion 2033 entering the pressure application bottom plate 202 increases, the pressure application bottom plate 202 can move upward relative to the pressure application top plate 201 (the initial distance decreases), and when the pressure application bottom plate 202 is driven downward by the downward pressing linear drive mechanism 200 to press the pressure sensor subsequently, the pressure applied to the pressure sensor will also decrease;

[0060] Conversely, if the bolt head 2031 is rotated backward, such that the length dimension of the screw rod portion 2033 entering the pressure application bottom plate 202 decreases, the pressure application bottom plate 202 can move downward relative to the pressure application top plate 201 (the initial distance increases), and when the pressure application bottom plate 202 is driven downward by the downward pressing linear drive mechanism 200 to press the pressure sensor subsequently, the pressure applied to the pressure sensor will also increase.

[0061] It should be noted that the provision of the smooth rod portion 2032 can reduce the frictional resistance between the adjusting bolt and the pressure application top plate 201, and improve the smoothness of the up-and-down sliding of the pressure application bottom plate 202.

[0062] Optionally, the number of the adjusting bolts is four, and one adjusting bolt is correspondingly provided at each vertex angle of the pressure application bottom plate 202, which is beneficial to finely adjust the height of each corner of the pressure application bottom plate 202 and facilitate the adjustment of the horizontality of the bottom surface of the pressure application bottom plate 202.

[0063] In summary, the pressure sensor test fixture 100 provided in this embodiment has the following advantages:

[0064] ① Through the cooperation of the distance adjustment assembly 203 and the elastic member 204, the present utility model can provide continuously adjustable pressure, solves the problem of discontinuous pressure in the existing test device, and meets the diverse test requirements;

[0065] ② By setting the middle section of the adjusting bolt as the smooth rod portion 2032, it is beneficial to reduce the frictional resistance between the adjusting bolt and the pressure application top plate 201, and improve the smoothness of the up-and-down sliding of the pressure application bottom plate 202.

[0066] It should be noted that the linear drive mechanism mentioned in the present utility model can be a cylinder, a hydraulic cylinder, an electric cylinder, or a motor screw linear module, etc., and the rotary drive mechanism mentioned can be a brushed motor, a brushless motor, or a rotary cylinder, etc. The present utility model does not limit the specific structural forms of the linear drive mechanism and the rotary drive mechanism.

[0067] Finally, it should be noted that although the above embodiments have been described in the text and drawings of the specification of the present application, the patent protection scope of the present application cannot be limited thereby. Any equivalent structure or equivalent process substitution or modification of the technical solutions made by using the content recorded in the text and drawings of the specification of the present application based on the substantial concept of the present application, as well as the direct or indirect implementation of the technical solutions of the above embodiments in other related technical fields, etc., are all included in the patent protection scope of the present application.

Claims

1. A pressure sensor test fixture, characterized in that: include: A fixture base (1), wherein the fixture base (1) is used to place a pressure sensor to be tested; An elastic pressure component (2) is slidably disposed above the fixture base (1) and is driven to press the pressure sensor downward; wherein the elastic pressure component (2) comprises a pressure top plate (201), a pressure bottom plate (202) slidably disposed below the pressure top plate (201), a distance adjustment component (203) for continuously adjusting the distance between the pressure top plate (201) and the pressure bottom plate (202), and an elastic component (204) for driving the pressure bottom plate (202) to slide downward relative to the pressure top plate (201).

2. The pressure sensor test fixture according to claim 1, characterized in that: The elastic pressure component (2) further comprises: A first guide column (205), wherein the upper end of the first guide column (205) slides through the pressure top plate (201), and the lower end is fixedly mounted on the pressure bottom plate (202).

3. The pressure sensor test fixture according to claim 1, characterized in that: The distance adjustment assembly (203) comprises a plurality of adjustment bolts; The adjusting bolt passes through the pressure top plate (201) from above the pressure top plate (201) downwards and is then threadedly connected to the pressure bottom plate (202).

4. The pressure sensor test fixture according to claim 3, characterized in that: The pressure top plate (201) is provided with a head receiving groove (2011) located at the top surface of the pressure top plate (201), and a rod passing groove (2012) extending downward from the groove bottom of the head receiving groove (2011) through the pressure top plate (201).

5. The pressure sensor test fixture according to claim 4, characterized in that: The adjusting bolt comprises, from top to bottom, a bolt head (2031) located in the head receiving groove (2011), a bare rod portion (2032) passing through the rod slot (2012), and a screw rod portion (2033) threadedly connected to the pressure base plate (202).

6. The pressure sensor test fixture according to claim 5, characterized in that: The diameter of the rod-passing groove (2012) is smaller than the diameter of the bolt head (2031), so as to limit the bolt head (2031) from passing through the rod-passing groove (2012).

7. The pressure sensor test fixture according to claim 3, characterized in that: The number of the adjusting bolts is four, and one adjusting bolt is correspondingly arranged at each top corner of the pressure base plate (202).

8. The pressure sensor test fixture according to claim 5, characterized in that: The elastic component (204) is a compression spring, and the elastic component (204) is sleeved on the light rod portion (2032).

9. The pressure sensor test fixture according to claim 1, characterized in that: Also includes: A second guide column (3), the upper end of which slides through the pressure top plate (201), and the lower end of which is fixedly mounted on the fixture base (1).

10. A testing device, characterized in that: It comprises a pressure sensor test fixture (100) as claimed in any one of claims 1 to 9, and a downward pressing linear drive mechanism (200) for driving an elastic pressure-applying component (2) of the pressure sensor test fixture (100) to press downwardly a pressure sensor to be tested.

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