Wire displacement sensor performance test fixture

Abstract

The application provides a kind of line displacement sensor performance test tool, including pedestal, sample stage, linear drive assembly, jaw assembly and grating measurement assembly.Sample stage, linear drive assembly and grating measurement assembly are all installed on pedestal.When testing, line displacement sensor is placed on sample stage, ensuring the stability of line displacement sensor during testing.Linear drive assembly includes a sliding table, which can move along the working straight line direction of line displacement sensor.Jaw assembly is installed on the sliding table, and the jaw assembly can be clamped to the movable measuring end of line displacement sensor.With the movement of the sliding table, the jaw assembly synchronously drives the movable measuring end of line displacement sensor to displace on its body.By comparing the measurement value of grating measurement assembly with the value read on line displacement sensor, the accuracy, linearity and repeatability of line displacement sensor can be evaluated, and data support is provided for subsequent troubleshooting and sensor calibration.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of sensor testing, and more particularly relates to a linear displacement sensor performance testing tool. BACKGROUND

[0002] In the rapid development of modern industry and technology, as an indispensable key element in the automatic control system, the performance index precision and stability of the linear displacement sensor are directly related to the operation efficiency and safety of the whole system. In order to ensure the accuracy and reliability of the linear displacement sensor in use, it is particularly important to test its actual performance. Therefore, a special tool for testing the performance of the linear displacement sensor is needed. SUMMARY

[0003] The purpose of the embodiment of the application is to provide a linear displacement sensor performance testing tool to solve the technical problem of testing the performance of the linear displacement sensor in the prior art.

[0004] To achieve the above-mentioned purpose, the technical scheme adopted by the application is:

[0005] Provided is a linear displacement sensor performance testing tool, comprising:

[0006] a base;

[0007] a sample loading table connected to the base, on which the linear displacement sensor is placed;

[0008] a linear drive assembly installed on the base, the linear drive assembly comprising a sliding table, the sliding table being movable along the working straight line direction of the linear displacement sensor;

[0009] a clamping jaw assembly installed on the sliding table, the clamping jaw assembly being clampingly connected to the movable measuring end of the linear displacement sensor; when the sliding table moves, the clamping jaw assembly drives the movable measuring end of the linear displacement sensor to move on the body of the linear displacement sensor;

[0010] a grating measurement assembly connected to the base, for measuring the displacement amount of the sliding table.

[0011] As a further improvement of the above technical scheme:

[0012] Optionally, the sample loading table has a mounting groove, the linear displacement sensor is placed in the mounting groove, one end of the mounting groove has an open mouth, and a safety valve assembly is arranged at the open mouth.

[0013] Optionally, the safety valve assembly comprises a valve body and an elastic valve core, the valve body is connected to the base, the elastic valve core is slidably connected to the valve body, and is elastically pressed against the linear displacement sensor on the mounting groove.

[0014] Optionally, the linear drive assembly further comprises a slide rail and a drive mechanism, the slide rail is connected to the base, the slide table is slidably connected to the slide rail, and the drive mechanism is drivingly connected to the slide table.

[0015] Optionally, the drive mechanism comprises a drive screw rod, a driven nut, and a pair of screw rod seats, the pair of screw rod seats are connected to the base and are respectively connected to two ends of the drive screw rod, the drive screw rod is rotatably connected to the screw rod seats, and the driven nut is connected to the slide table, is sleeved on the drive screw rod, and is threadedly connected to the drive screw rod.

[0016] Optionally, the clamping jaw assembly comprises a housing, a fixed jaw lobe, a movable jaw lobe, and a handle, the housing is connected to the slide table, the fixed jaw lobe is connected to the housing, the movable jaw lobe is movably connected to the housing, and the handle is drivingly connected to the movable jaw lobe to drive the movable jaw lobe to approach or move away from the fixed jaw lobe.

[0017] Optionally, the grating measurement assembly comprises a grating scale and a grating reading head, the grating scale is connected to the base, and the grating reading head is connected to the slide table and is slidably connected to the grating scale.

[0018] Optionally, the sample loading table is located on one side of the moving direction of the slide table, and the grating assembly is located on the other side of the moving direction of the slide table.

[0019] Optionally, the linear displacement sensor performance test tooling comprises a voltage source, and the voltage source is electrically connected to the linear displacement sensor.

[0020] Optionally, the linear displacement sensor performance test tooling further comprises a voltmeter, and the voltmeter is electrically connected to the linear displacement sensor.

[0021] The linear displacement sensor performance test tooling provided in the application has the following beneficial effects:

[0022] The wire displacement sensor performance test tool provided by the application comprises a base, a sample loading table, a linear drive assembly, a jaw assembly and a grating measurement assembly. The sample loading table, the linear drive assembly and the grating measurement assembly are all mounted on the base. During testing, the wire displacement sensor is placed on the sample loading table to ensure the stability of the wire displacement sensor during the testing process. The linear drive assembly specifically comprises a sliding table, which can move along the working straight line direction of the wire displacement sensor. The jaw assembly is mounted on the sliding table and is connected to the movable measurement end of the wire displacement sensor in a clamping manner. With the movement of the sliding table, the jaw assembly synchronously drives the movable measurement end of the wire displacement sensor to displace on the body, thereby simulating the measurement action in the actual work. The grating measurement assembly can convert the displacement amount of the sliding table into an electrical signal. By comparing the measurement value of the grating measurement assembly with the value read on the wire displacement sensor, the accuracy, linearity and repeatability and other key performance parameters of the wire displacement sensor can be evaluated, and data support is provided for subsequent fault troubleshooting and sensor calibration. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0024] Figure 1 A perspective structural schematic view of the wire displacement sensor performance test tool provided by the application is shown in the figure.

[0025] Figure 2 A top view structural schematic view of the wire displacement sensor performance test tool provided by the application is shown in the figure.

[0026] Figure 3 A partial enlarged structural schematic view of the wire displacement sensor performance test tool provided by the application is shown in the figure.

[0027] Figure 4 A perspective structural schematic view of the jaw assembly provided by the application is shown in the figure.

[0028] Figure 5 A perspective structural schematic view of the sample loading table and the safety valve assembly provided by the application is shown in the figure.

[0029] In the figure, various reference signs in the figure:

[0030] 1, base;

[0031] 2, sample loading table; 21, mounting groove;

[0032] 3, wire displacement sensor;

[0033] 4. linear drive assembly; 41. sliding table; 42. sliding rail; 43. driving mechanism; 431. driving screw; 432. driven nut; 433. screw base;

[0034] 5. clamping jaw assembly; 51. housing; 52. fixed jaw; 53. movable jaw; 54. handle;

[0035] 6. grating measurement assembly; 61. grating scale; 62. grating reader head;

[0036] 7. safety valve assembly; 71. valve body; 72. elastic valve core. DETAILED DESCRIPTION

[0037] The embodiments of the present application are described below in detail with reference to the accompanying drawings. The embodiments described below are examples for explaining the present application and should not be construed as limiting the present application.

[0038] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be construed as limiting the present application.

[0039] In addition, the terms "first", "second", "third", etc. are only for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second", etc. can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0040] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0041] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature can include that the first and second features are in direct contact, or can include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature is "on", "above" and "over" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is higher in horizontal height than the second feature. The first feature is "under", "below" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the first feature is lower in horizontal height than the second feature.

[0042] In addition, the technical solutions among various embodiments can be combined with each other, but it must be based on that a person skilled in the art can realize, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist and is not within the scope disclosed by the present application.

[0043] In the following description, suffixes such as "module", "component", "assembly" or "unit" are used only for the convenience of description of the present application, and have no specific meaning in itself. Therefore, they can be mixedly used.

[0044] The present application will be further described in detail below with the specific embodiments in conjunction with the drawings.

[0045] To realize the test of the performance of the linear displacement sensor, as shown in Figure 1 and Figure 2 , the present application provides a linear displacement sensor performance test tool, which comprises a base 1, a sample loading table 2, a linear driving assembly 4, a jaw assembly 5 and a grating measurement assembly 6. The sample loading table 2, the linear driving assembly 4 and the grating measurement assembly 6 are all mounted on the base 1. During the test, the linear displacement sensor 3 is placed on the sample loading table 2 to ensure the stability of the linear displacement sensor 3 during the test. The linear driving assembly 4 specifically comprises a sliding table 41, which can move along the working straight line direction of the linear displacement sensor 3. The jaw assembly 5 is installed on the sliding table 41, and the jaw assembly 5 is connectable to the movable measurement end of the linear displacement sensor 3 in a clamping manner. With the movement of the sliding table 41, the jaw assembly 5 synchronously drives the movable measurement end of the linear displacement sensor 3 to displace on the body thereof, simulating the measurement action in the actual work. The grating measurement assembly 6 can convert the displacement amount of the sliding table 41 into an electrical signal. By comparing the measurement value of the grating measurement assembly 6 with the value read on the linear displacement sensor 3, the accuracy, linearity and repeatability and other key performance parameters of the linear displacement sensor 3 can be evaluated, and data support is also provided for subsequent fault troubleshooting and sensor calibration.

[0046] As shown in Figure 1 and Figure 5As shown in the specific embodiment of the present application, the sample carrier 2 is provided with a mounting groove 21, and the wire displacement sensor 3 is arranged in the mounting groove 21, and the mounting groove 21 limits the wire displacement sensor 3. One end of the mounting groove 21 is provided with an open end, and the open end is provided with a safety valve assembly 7. The wire displacement sensor 3 is fixed on the sample carrier 2 through the cooperation of the safety valve assembly 7 and the mounting groove 21, and the safety valve assembly 7 can also protect the wire displacement sensor 3. When the movable measuring end of the wire displacement sensor 3 reaches its predetermined limit position during the execution of the measurement task, if the jaw assembly 5 continues to attempt to drive the movable measuring end to move further due to misoperation or external factors, the safety valve assembly 7 can absorb and offset the additional displacement from the jaw assembly 5 through its deformation mechanism, thereby avoiding direct mechanical impact and potential damage to the wire displacement sensor 3, not only protecting the structure of the sensor from being damaged, but also ensuring the continuous and stable operation of the entire measurement system and prolonging the service life of the equipment.

[0047] As shown in the specific embodiment of the present application, Figure 1 and Figure 5 As shown in the specific embodiment of the present application, the safety valve assembly 7 includes a valve body 71 and an elastic valve core 72. The valve body 71 serves as the support and positioning basis of the entire assembly and is connected to the base 1. The elastic valve core 72 is slidably connected to the valve body 71 and is in elastic pressure against the wire displacement sensor 3 on the mounting groove 21. In the normal working state, when the force acting on the elastic valve core 72 from the wire displacement sensor 3 does not exceed the preset safety threshold, the elastic valve core 72 remains in its extended state and is stably pressed against the wire displacement sensor 3. Once the jaw assembly 5 pushes the movable measuring end of the wire displacement sensor 3 beyond the limit position, causing the force acting on the elastic valve core 72 to exceed the safety threshold, the elastic valve core 72 automatically retracts into the valve body 71, thereby effectively blocking the pressure from rising further and protecting the wire displacement sensor 3 from rigid damage.

[0048] As shown in the specific embodiment of the present application, Figure 1 and Figure 3 As shown in the specific embodiment of the present application, the linear drive assembly 4 further includes a slide rail 42 and a drive mechanism 43. The slide rail 42 is connected to the base 1, the slide table 41 is slidably connected to the slide rail 42, and the drive mechanism 43 is used to drive the slide table 41 to move linearly and reciprocally on the slide rail 42. The drive mechanism 43 can be an electric motor, a hydraulic / cylinder or other driving means, and the specific choice depends on the requirements of the actual application scenario to ensure that the linear drive assembly 4 can meet different working conditions and performance requirements.

[0049] As shown in the specific embodiment of the present application, Figure 1 and Figure 3As shown in the drawings, in one specific embodiment of the present application, the driving mechanism 43 comprises a driving screw rod 431, a driven nut 432, and a pair of screw rod seats 433. The pair of screw rod seats 433 are both connected to the base 1, and are respectively connected to the two ends of the driving screw rod 431 to fix and support the driving screw rod 431. The driving screw rod 431 is rotatably connected to the screw rod seat 433, which ensures the rotation freedom of the driving screw rod 431. The driven nut 432 is connected to the sliding table 41, and is sleeved on the driving screw rod 431 and threadedly connected with the driving screw rod 431. When the driving screw rod 431 rotates under the action of an external force, the driven nut 432 converts the rotary motion into linear motion through the interaction between the threads, and then drives the sliding table 41 to smoothly slide along the preset track.

[0050] As shown in the drawings, Figure 1 and Figure 4 As shown in the drawings, in one specific embodiment of the present application, the clamping jaw assembly 5 comprises a housing 51, a fixed jaw 52, a movable jaw 53, and a handle 54. The housing 51 is connected to the sliding table 41, and the housing 51 is driven by the sliding table 41 to move along the preset path. The fixed jaw 52 is connected to the housing 51, the movable jaw 53 is movably connected to the housing 51, and the handle 54 is drivingly connected with the movable jaw 53 to drive the movable jaw 53 to approach or move away from the fixed jaw 52, so as to clamp or unclamp the movable measuring end of the linear displacement sensor 3.

[0051] As shown in the drawings, Figure 1 and Figure 2 As shown in the drawings, in one specific embodiment of the present application, the grating measurement assembly 6 comprises a grating scale 61 and a grating reading head 62. The grating scale 61 is connected to the base 1, and the grating reading head 62 is connected to the sliding table 41. The grating reading head 62 is slidably connected to the grating scale 61. The grating reading head 62 can read the grating pattern on the grating scale 61 in real time, and convert it into an electrical signal for processing, so as to realize the conversion from physical displacement to digital signal.

[0052] As shown in the drawings, Figure 1 and Figure 2 As shown in the drawings, in one specific embodiment of the present application, the sample carrier 2 is located on one side of the moving direction of the sliding table 41, and the grating assembly is located on the other side of the moving direction of the sliding table 41, so as to reduce the space length required by the sliding table 41 in the main moving direction, and avoid the stability problem caused by the long structure. By separating the sample carrier 2 and the grating assembly on both sides of the sliding table 41, the overall size of the equipment is effectively reduced, the structural rigidity of the sliding table 41 is improved, and the deflection deformation caused by long distance movement is reduced.

[0053] In one embodiment of the present application, the wire displacement sensor performance test fixture further comprises a voltage source (not shown in the figure) electrically connected with the wire displacement sensor 3. The voltage source is used to provide a continuous and stable voltage during the test to meet the basic conditions for the normal operation of the wire displacement sensor 3.

[0054] In one embodiment of the present application, the wire displacement sensor performance test fixture further comprises a voltmeter (not shown in the figure) electrically connected with the wire displacement sensor 3. As the displacement of the active measuring end of the wire displacement sensor 3 changes, the electrical signal output by the wire displacement sensor 3 fluctuates. The voltmeter can capture and record the changes in the electrical signal of the wire displacement sensor 3 when it is working, so as to facilitate the analysis of its performance parameters.

[0055] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. 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The wire displacement sensor performance test fixture of claim 1, wherein, ​ 3. The wire displacement sensor performance test fixture of claim 1, wherein, The grating measurement assembly (6) comprises a grating scale (61) connected to the base (1) and a grating reading head (62) connected to the sliding table (41), the grating reading head (62) being slidably connected to the grating scale (61).

4. The wire displacement sensor performance test fixture of claim 1, wherein, The sample loading table (2) is located on one side of the moving direction of the sliding table (41), and the grating measurement assembly is located on the other side of the moving direction of the sliding table (41).

5. The wire displacement sensor performance test fixture of claim 1 wherein, A voltage source is further included, and the voltage source is electrically connected with the linear displacement sensor (3).

6. The wire displacement sensor performance test fixture of claim 5, wherein, A voltmeter is further included, and the voltmeter is electrically connected with the linear displacement sensor (3).

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