A stability testing device for strain sensors

Abstract

This utility model discloses a stability testing device for a strain sensor, comprising a fixed frame, a loading member, and a base plate. The top plate of the fixed frame has downward-facing vertical walls at both ends. The base plate is slidably or fixedly disposed between the two vertical walls and is located parallel to the bottom plate. A loading member is disposed on the top plate of the fixed frame, facing the base plate. The loading member applies different intensities of loading force to the sensor under test, which is horizontally placed on the base plate, in a direction perpendicular to the base plate. This utility model is applicable to strain sensors subjected to force, enabling stability testing of the sensor under different loading forces.

Description

Technical Field

[0001] This utility model belongs to the field of force testing technology, specifically relating to a stability testing device for a strain sensor. Background Technology

[0002] A sensor is a device that can sense and measure various physical quantities in the environment. It can convert various physical quantities into electrical signals or other forms of signals. Sensors are widely used in many fields, including industrial control, automation, environmental monitoring, medical equipment, and smartphones. In the process of sensor installation and use, the sensor base is usually fixed in the corresponding position first, and then the sensor is installed on the sensor base to facilitate the replacement and maintenance of the sensor later.

[0003] The stability of the sensor's own detection data is particularly important, so it is necessary to develop a testing device for detecting the stability of the sensor. Utility Model Content

[0004] The purpose of this invention is to provide a stability testing device for strain sensors, which is applicable to force-bearing strain sensors and enables stability testing of the sensors under different loading forces.

[0005] The technical solution adopted by this utility model to solve its technical problem is to propose a stability testing device for a strain sensor, including a fixed frame, a loading member, and a base plate. The top plate of the fixed frame has vertical walls at both ends facing downwards. The base plate is slidably or fixedly disposed between the two vertical walls and is located parallel to the bottom plate. The top plate of the fixed frame is provided with a loading member facing the base plate. The loading member applies loading forces of different intensities to the sensor to be tested, which is placed horizontally on the base plate, in a direction perpendicular to the base plate.

[0006] The loading end of the loading element is displaced downward in a direction perpendicular to the base plate, applying loading forces of different intensities to the sensor under test placed horizontally on the base plate.

[0007] Furthermore, the top plate has multiple screw holes, and the loading member is a loading bolt. The loading bolt is screwed vertically into the screw holes, so that the loading end of the loading bolt is displaced downward in a direction perpendicular to the bottom plate.

[0008] Furthermore, the top plate has multiple through holes, and the loading member is a telescopic structure. The telescopic structure is inverted and fixed to the top plate, and the telescopic shaft of the telescopic structure is vertically downward through the through holes, so that the loading end of the telescopic shaft is displaced downward in a direction perpendicular to the bottom plate.

[0009] Furthermore, the top plate is equipped with multiple loading components, and the bottom plate is horizontally positioned directly below the loading components, so that the loading end of the loading component lands on the sensor under test.

[0010] Furthermore, the base plate includes a first plate and a second plate, and the sensor to be tested is horizontally placed on the first plate and the second plate.

[0011] Furthermore, the first plate is fixed to the front side of the two upright walls, and the second plate is fixed to the rear side of the two upright walls. The first plate and the second plate are parallel and have the same height.

[0012] Furthermore, the first plate and / or the second plate are slidably disposed between the two vertical walls, so that the distance between the first plate and the second plate is adjustable, and the first plate and the second plate are parallel and have the same height.

[0013] Furthermore, the loading force applied by the loading member to the sensor under test falls within the distance range between the first plate and the second plate.

[0014] Furthermore, the base plate is provided with a plurality of limiting components for positioning the sensor under test. The limiting components include a first limiting area and a second limiting area. The first limiting area is located on the first plate, and the second limiting area is located on the second plate. The first limiting area and the second limiting area are directly opposite each other in the horizontal direction.

[0015] Furthermore, a first limiting member is provided in the first limiting area, and a second limiting member is provided in the second limiting area. The first limiting member and the second limiting member jointly position the sensor under test.

[0016] Preferably, the first limiting member and the second limiting member work together to position the sensor under test, including stopping and clamping limiting of the sensor under test.

[0017] The beneficial effects of this utility model are as follows:

[0018] This invention proposes a stability testing device for strain sensors, which applies different force states to the sensor while keeping the loading force constant, thereby achieving stability testing of the sensor under different loading forces.

[0019] The sensor can be subjected to different stress states at different locations within its stress area, resulting in different points where the applied force lands. This diversifies the testing of the sensor's stability, facilitating optimization and compensation of the sensor's structure and detection data.

[0020] It can be adapted to sensors of different sizes for stability testing. Attached Figure Description

[0021] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention. In these drawings, similar reference numerals are used to denote similar elements. The drawings described below are some embodiments of the present invention, but not all embodiments. Other drawings will be readily available to those skilled in the art based on these drawings without any inventive effort.

[0022] Figure 1 This is a schematic diagram of the structure of a stability testing device for a strain sensor according to an embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the layout of the upper limit assembly on the base plate.

[0024] In the diagram: 1. Fixing frame; 2. Loading component; 3. Base plate; 4. Sensor; 5. Limiting assembly; 11. Loading hole; 31. First plate; 32. Second plate; 51. First limiting area; 52. Second limiting area. Detailed Implementation

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model and the prior art, the specific implementation methods of this utility model will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without creative effort. Furthermore, the design orientation only indicates the relative positional relationship between the components, not the absolute positional relationship.

[0026] This utility model provides a stability testing device for strain sensors. Please refer to [link / reference]. Figure 1 , Figure 2 It mainly includes a fixed frame 1, a loading component 2, and a base plate 3. The top plate of the fixed frame 1 has vertical walls at both ends facing downwards. The base plate 3 is slidably or fixedly located between the two vertical walls and is located parallel to the bottom of the top plate. The top plate of the fixed frame 1 is equipped with a loading component 2 facing the base plate 3. The loading component 2 applies different intensities of loading force to the sensor to be tested, which is placed horizontally on the base plate 3, in a direction perpendicular to the base plate 3.

[0027] In this application, the sensor to be tested can be a strain sensor of the force type. When the strain sensor is subjected to force, it generates a detection signal. The accuracy of the detection signal can be determined by the applied force.

[0028] Since the strain sensor may deform to a certain extent after being subjected to force, a corresponding gap can be reserved on the base plate 3. When the sensor to be tested is placed horizontally on the base plate 3, it should be ensured that the force-bearing area / range of the sensor to be tested is located at the gap. The size of the gap can match the size of the force-bearing area, so as not to affect its deformation.

[0029] Specifically, a region hole can be opened on the base plate 3 to allow the sensor under test to deform, and the stress area of ​​the long-term device under test is located within the region hole.

[0030] In the above embodiment of the base plate 3, the base plate 3 can be a single plate structure, and the position of the hole of the reference area of ​​the sensor to be tested can be horizontally placed on the base plate 3. The base plate 3 and the fixing frame 1 can be an integral structure.

[0031] Of course, the base plate 3 can also be a split structure, and can have different connection relationships with the fixing frame 1, so that the size of the area hole can be adjusted to adapt to the stability test of different sized sensors.

[0032] Specifically, the top plate of the fixing frame 1 has vertical walls at both ends, and the bottom plate 3 is fixed between the two vertical walls. The bottom plate 3 is parallel to the top plate and directly below it. The bottom plate 3 includes a first plate 31 and a second plate 32. The gap between the first plate 31 and the second plate 32 is the area hole. The sensor to be tested is placed horizontally on the first plate 31 and the second plate 32, and the force area is aligned with the area hole.

[0033] In one feasible embodiment, the connection between the split base plate 3 and the fixing frame 1 can be fixed. In this case, the gap size between the first plate 31 and the second plate 32 is fixed, that is, the size of the area hole is fixed.

[0034] For example, the first plate 31 is fixed to the front side of the two upright walls, and the second plate 32 is fixed to the rear side of the two upright walls. The first plate 31 and the second plate 32 are parallel and have the same height.

[0035] In a preferred embodiment, the connection between the split base plate 3 and the fixing frame 1 can be sliding. In this case, the gap size between the first plate 31 and the second plate 32 is not fixed, that is, the size of the area hole is adjustable and can be adjusted based on the size of the sensor to be tested.

[0036] For example, the first plate 31 and / or the second plate 32 are slidably disposed between two vertical walls, so that the distance between the first plate 31 and the second plate 32 is adjustable, and the first plate 31 and the second plate 32 are parallel and have the same height.

[0037] It should be clarified that the loading force applied to the sensor under test by the loading component 2 can be located within the distance between the first plate 31 and the second plate 32 to accommodate the deformation of the sensor under test; when the sensor under test does not deform, the loading force can be arbitrarily selected.

[0038] It should also be clarified that when the first plate 31 and / or the second plate 32 are slidably disposed between the two vertical walls, the following three situations apply:

[0039] Firstly, the first plate 31 is fixedly connected to the two vertical walls, and the second plate 32 is slidably disposed between the two vertical walls. At this time, the distance between the second plate 32 and the first plate 31 is adjustable, and the position of the sensor to be tested is relatively small, that is, the position of the force-bearing area is fixed. When the position of the loading member 2 is fixed, the landing point of the loading end on the sensor to be tested is fixed, and the landing point position cannot be adjusted in the force-bearing area.

[0040] Secondly, the first plate 31 is slidably disposed between the two vertical walls, and the second plate 32 is fixedly connected to the two vertical walls. In this case, it is similar to the situation in the first case mentioned above, and will not be described in detail.

[0041] Third, the first plate 31 and the second plate 32 are both slidably disposed between the two vertical walls. At this time, the distance between the first plate 31 and the second plate 32 is adjustable, and the position of the sensor to be tested can be adjusted within a large range, that is, the position of the force-bearing area is adjustable. When the position of the loading member 2 is fixed, the position of the loading end on the sensor to be tested is adjustable. By synchronously adjusting the positions of the two plates, the landing point of the loading force can be located at different positions on the force-bearing area.

[0042] Therefore, force can be applied to different locations within the sensor's stress area, resulting in different points of force application. This diversifies the testing of sensor stability, facilitating optimization and compensation of the sensor's structure and detection data.

[0043] In the embodiments of this application, the sensor under test is placed horizontally on the base plate 3. A limiting component 5 can be configured on the base plate 3 to define the placement position of the sensor under test on the base plate 3 and to achieve a limiting effect. The limiting effect can specifically include stopping, clamping, etc.

[0044] It is understandable that the positioning of the sensor under test can distinguish it from other sensors under test in other positions, so that the sensor under test does not move on the horizontal base plate 3, but this does not include the placement direction of the sensor under test.

[0045] Taking a split-structure base plate 3 as an example, the limiting component 5 may include a first limiting area 51 and a second limiting area 52. The first limiting area 51 is located on the first plate 31, and the second limiting area 52 is located on the second plate 32, with the first limiting area 51 and the second limiting area 52 facing each other in the horizontal direction. When applied to a one-piece structure base plate 3, the two limiting areas can be located on both sides of the area hole.

[0046] A first limiting member can be set in the first limiting area 51, and a second limiting member can be set in the second limiting area 52. The first limiting member and the second limiting member together position the sensor to be tested.

[0047] As a first feasible embodiment, both the first and second limiting members can be limiting posts. Two limiting posts are arranged on both sides of the sensor under test in the first limiting area 51, with the distance between the two limiting posts being the width of the sensor under test. The two limiting posts can restrict the left and right swing of the sensor under test. Three limiting posts are arranged in the second limiting area 52, with two limiting posts located on both sides of the sensor under test and the distance between them being the width of the sensor under test. The third limiting post is located at the end of the sensor. In the second limiting area 52, the limiting post at the end and the limiting posts on both sides are arranged in a triangular distribution. The three limiting posts can stop the end of the sensor under test and produce a positioning effect. The two limiting posts in the first limiting area 51 are used to determine the placement posture of the sensor under test.

[0048] Please see Figure 2 The sensor under test can be inserted from the port direction of the first limiting area 51, and the end is stopped by the limiting post in the second limiting area 52, thereby positioning the sensor under test; or it can be inserted from top to bottom, placing the end of the sensor under test in the limiting post of the second limiting area 52 and abutting against it.

[0049] As a second feasible embodiment, the first limiting member can be in the form of an elastic clamping piece, and the second limiting member can be in the form of a limiting post. Two clamping pieces are disposed on both sides of the sensor under test in the first limiting area 51. The two clamping pieces clamp and position the sensor under test. The two clamping pieces have the same elasticity and the same arrangement angle relative to the sensor under test. Three limiting posts are disposed in the second limiting area 52, which is the same as the configuration in the first embodiment. The three limiting posts can stop the end of the sensor under test and produce a positioning effect. The placement posture of the sensor under test can be determined by the two clamping pieces in the first limiting area 51.

[0050] The sensor under test can be inserted into the clamping port direction of the first limiting area 51, and the end is stopped by the limiting post in the second limiting area 52, thereby positioning the sensor under test. Of course, it can also be placed from top to bottom. Place the end of the sensor to be tested inside the limiting post of the second limiting area 52 and abut against it, but make sure that the clamping state of the clamping piece is in a position that allows insertion.

[0051] As a third feasible embodiment, both the first limiting member and the second limiting member are in the form of clamping pieces. Two clamping pieces are respectively arranged on both sides of the sensor under test in the first limiting area 51 and the second limiting area 52. The force-bearing area can be ensured to be in the position of the area hole by manually adjusting the clamping position, without the need to set a limiting post at the end of the sensor under test.

[0052] The sensor under test can be inserted from the orientation of the clamping port. Alternatively, it can be inserted from top to bottom, but it should be ensured that the clamping plates are in a position that allows for insertion.

[0053] In the embodiments of this application, the loading member 2 is disposed on the fixed frame 1. Specifically, it can be disposed on the top plate of the fixed frame 1, and a loading hole 11 is opened on the top plate. The loading end of the loading member 2 can pass through the loading hole 11 and face the bottom plate 3. The displacement direction of the loading end is perpendicular to the bottom plate 3, so that different loading forces can be applied to the sensor to be tested that is horizontally placed on the bottom plate 3, while maintaining the strength of the loading force.

[0054] Multiple loading elements 2 can be configured on the top plate. A sensor to be tested is horizontally placed on the bottom plate 3 directly below the loading elements 2, so that the landing point of the loading end of the loading element 2 is located on the sensor to be tested, thus completing the test. The position of the landing point within the force-bearing area is adjustable. Multiple sets of tests can be performed simultaneously.

[0055] In one feasible embodiment, the loading element 2 can be a loading bolt, and the loading hole 11 is in the form of a screw hole. Multiple screw holes are opened on the top plate, and the loading bolt is screwed into the screw hole in a vertical position, so that the loading end of the loading bolt is displaced downward in a direction perpendicular to the bottom plate 3.

[0056] Rotate the loading bolt to adjust the strength of the loading force. The strength of the loading force can be measured by the number of rotations of the loading bolt; or the loading force applied by the loading bolt to the test body at the same height as the sensor under test for each rated rotation angle can be measured by the rotation angle.

[0057] In another feasible embodiment, the loading member 2 can be a telescopic structure, such as a cylinder, an electric push rod, etc. The loading hole 11 is in the form of a through hole, and multiple through holes are opened on the top plate. The telescopic structure is inverted and fixed to the top plate, and the telescopic shaft of the telescopic structure is vertically downward through the through hole, so that the loading end of the telescopic shaft is displaced downward in a direction perpendicular to the bottom plate 3.

[0058] Taking a cylinder as an example, the driving force of the cylinder's telescopic shaft can be adjusted by changing the air pressure intensity, and the intensity of the applied force can be measured based on the air pressure intensity. The telescopic structure can be configured with a controller for adjusting the driving force and a display to show the applied force intensity of each loading component 2 configured on the top plate.

[0059] It is feasible to simultaneously configure the two types of loading elements 2 on the top plate of the same fixed frame 1. After conducting multiple sets of tests simultaneously, the method of applying the loading force can be changed to conduct verification tests.

[0060] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0061] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific embodiments of the present invention are limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. A stability testing device for a strain sensor, characterized in that, The device includes a fixed frame (1), a loading member (2), and a base plate (3). The top plate of the fixed frame (1) has vertical walls at both ends. The base plate (3) is slidably or fixedly disposed between the two vertical walls. The base plate (3) is located parallel to the bottom plate below the top plate. The top plate is provided with a loading member (2) facing the base plate (3). The loading member (2) applies different loading forces to the sensor to be tested, which is placed horizontally on the base plate (3), in a direction perpendicular to the base plate (3).

2. The stability testing device for a strain sensor according to claim 1, characterized in that, The top plate has multiple screw holes, and the loading member (2) is a loading bolt. The loading bolt is screwed into the screw hole in a vertical position, so that the loading end of the loading bolt is displaced downward in a direction perpendicular to the bottom plate (3).

3. The stability testing device for a strain sensor according to claim 1, characterized in that, The top plate has multiple through holes. The loading member (2) is a telescopic structure. The telescopic structure is fixedly connected to the top plate in an upside-down manner. The telescopic shaft of the telescopic structure is vertically downward through the through holes, so that the loading end of the telescopic shaft is displaced downward in a direction perpendicular to the bottom plate (3).

4. A stability testing device for a strain sensor according to claim 2 or 3, characterized in that, The top plate is equipped with multiple loading elements (2), and the bottom plate (3) is horizontally positioned directly below the loading elements (2) so that the loading end of the loading element (2) lands on the sensor under test.

5. The stability testing device for a strain sensor according to claim 1, characterized in that, The base plate (3) includes a first plate (31) and a second plate (32), and the sensor to be tested is placed horizontally on the first plate (31) and the second plate (32).

6. The stability testing device for a strain sensor according to claim 5, characterized in that, The first plate (31) is fixed to the front side of the two upright walls, and the second plate (32) is fixed to the rear side of the two upright walls. The first plate (31) and the second plate (32) are parallel and have the same height.

7. The stability testing device for a strain sensor according to claim 5, characterized in that, The first plate (31) and / or the second plate (32) are slidably disposed between the two vertical walls, so that the distance between the first plate (31) and the second plate (32) is adjustable, and the first plate (31) and the second plate (32) are parallel and have the same height.

8. The stability testing device for a strain sensor according to claim 5, characterized in that, The loading force applied by the loading element (2) to the sensor under test falls within the distance between the first plate (31) and the second plate (32).

9. The stability testing device for a strain sensor according to claim 5, characterized in that, The base plate (3) is provided with a plurality of limiting components (5) for positioning the sensor under test. The limiting components (5) include a first limiting area (51) and a second limiting area (52). The first limiting area (51) is located on the first plate (31), and the second limiting area (52) is located on the second plate (32). The first limiting area (51) and the second limiting area (52) are directly opposite each other in the horizontal direction.

10. A stability testing device for a strain sensor according to claim 9, characterized in that, A first limiting member is provided in the first limiting area (51), and a second limiting member is provided in the second limiting area (52). The first limiting member and the second limiting member jointly position the sensor to be tested.

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