Displacement sensor precision testing device

Abstract

The utility model provides a displacement sensor precision testing device, which comprises a base, a driving piece, a screw rod and a sliding block, a displacement sensor to be tested is arranged on the base, the driving piece is connected with the screw rod, and the screw rod is rotationally connected with the sliding block and is connected with the displacement sensor to be tested through the sliding block. According to the utility model, the test precision is high, the test time is optimized, and the test efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of displacement sensors, in particular to a testing device for the accuracy of displacement sensors. Background Art

[0002] The linear displacement sensor tests the corresponding voltage and resistance by moving the distance. In order to measure accurate test data, the distance of each movement must be accurate to within 0.1mm. In the past, the simple test method was to manually slide a certain distance and then measure the moving distance with a ruler. The test results were relatively poor in accuracy and efficiency, and could not meet the requirements of the specification.

[0003] The utility model with publication number CN214620944U discloses a high-precision linear displacement sensor test fixture, which has a sensor bracket and a differential head bracket on the upper end of the bottom plate, a sensor to be tested is installed on the sensor bracket, a digital differential head is installed on the differential head bracket, and the sensor core of the sensor is coaxially connected to the digital differential head core shaft through a connecting rod. However, the above test fixture needs to use the digital differential head to measure the displacement of the sensor. Utility Model Content

[0004] The utility model aims to solve the defects in the prior art and provide a displacement sensor accuracy testing device with high testing accuracy, optimized testing time and improved testing efficiency.

[0005] To achieve the above-mentioned purpose, the utility model provides a testing device for the accuracy of a displacement sensor, comprising a base, a driving member, a screw rod and a sliding block, wherein the base is mounted with a displacement sensor to be tested, the driving member is connected to the screw rod, the screw rod is rotatably connected to the sliding block, and is connected to the displacement sensor to be tested through the sliding block.

[0006] When testing the accuracy of the displacement sensor to be tested, the driving part drives the screw to rotate evenly, so that the sliding block moves on the screw, and drives the detection end of the displacement sensor to be tested to move. The pitch of the screw is a fixed value. Each time it rotates evenly, the linear motion of the sliding block is converted into a fixed value of the linear velocity of the screw, so that each distance moved by the detection end of the displacement sensor to be tested is an accurate value, and the voltage and resistance corresponding to each distance are accurate values. Therefore, the linearity result of the displacement sensor tested by this device is highly accurate, and there is no need to use measuring instruments to measure the displacement of the displacement sensor, which optimizes the test time and improves the test efficiency.

[0007] Optionally, a pull rod is provided on the displacement sensor to be tested, the sliding block is connected to the pull rod, the detection end of the displacement sensor to be tested is the pull rod, and the sliding block is connected to the pull rod through a connecting piece.

[0008] Optionally, a mounting plate is provided on the base, and the driving member is arranged on the mounting plate.

[0009] Optionally, the driving member is located on a side of the mounting plate away from the screw rod, and the driving member passes through the mounting plate and is connected to the screw rod.

[0010] Optionally, the driving component is a stepper motor, which can accurately control the rotation speed of the lead screw so that the sliding block driven by the lead screw can obtain an accurate distance value each time it moves, and together with the corresponding voltage value, the test accuracy meets the specification requirements.

[0011] Optionally, a fixing seat is further provided on the base, and both ends of the screw rod are rotatably connected to the fixing seat respectively.

[0012] Optionally, a bearing is provided between the screw rod and the fixing seat to reduce the friction between the fixing seat and the screw rod.

[0013] Beneficial effects:

[0014] The utility model comprises a base, a driving member, a screw rod and a sliding block. A displacement sensor to be measured is installed on the base. The driving member is connected to the screw rod. The screw rod is rotationally connected to the sliding block and is connected to the displacement sensor to be measured through the sliding block.

[0015] When testing the accuracy of the displacement sensor to be tested, the driving part drives the screw to rotate evenly, so that the sliding block moves on the screw, and drives the detection end of the displacement sensor to be tested to move. The pitch of the screw is a fixed value. Each time it rotates evenly, the linear motion of the sliding block is converted into a fixed value of the linear velocity of the screw, so that each distance moved by the detection end of the displacement sensor to be tested is an accurate value, and the voltage and resistance corresponding to each distance are accurate values. Therefore, the linearity result of the displacement sensor tested by this device is highly accurate, and there is no need to use measuring instruments to measure the displacement of the displacement sensor, which optimizes the test time and improves the test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0017] Figure 1 The utility model is a structural diagram of a displacement sensor accuracy testing device disclosed in the present invention.

[0018] Figure numerals: 1 base; 2 mounting plate; 3 driving member; 4 fixing seat; 5 screw rod; 6 sliding block; 7 connecting member; 8 displacement sensor; 9 pull rod.

[0019] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with the implementation methods and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] In the description of the present utility model, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present utility model based on the specific content of the technical solution.

[0022] In the description of the present invention, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0023] See also Figure 1 According to the embodiment of the utility model, the displacement sensor accuracy testing device includes a base 1, a driving member 3, a screw rod 5 and a sliding block 6. The base 1 is equipped with a displacement sensor 8 to be tested. The driving member 3 is connected to the screw rod 5. The screw rod 5 is rotatably connected to the sliding block 6 and is connected to the displacement sensor 8 to be tested through the sliding block 6.

[0024] Specifically, the cross section of the base 1 is stepped, and the driving member 3 , the lead screw 5 and the displacement sensor 8 to be measured are sequentially located on three step surfaces of the base 1 from bottom to top.

[0025] When the accuracy of the displacement sensor to be tested is tested, the driving member 3 drives the screw 5 to rotate evenly, so that the sliding block 6 moves on the screw 5, and drives the detection end of the displacement sensor 8 to be tested to move. The pitch of the screw 5 is a fixed value. Each time it rotates evenly, the linear motion of the sliding block 6 is converted into a fixed value of the linear velocity of the screw 5, so that each distance of the detection end of the displacement sensor 8 to be tested is a precise value, and the voltage and resistance corresponding to each distance are also precise values. Therefore, the linearity result of the displacement sensor 8 to be tested tested by the device is highly accurate, and there is no need to use a measuring instrument to measure the displacement of the displacement sensor 8, which optimizes the test time and improves the test efficiency.

[0026] See also Figure 1 In some embodiments of the utility model, the displacement sensor 8 to be tested is provided with a pull rod 9, and the sliding block 6 is connected to the pull rod 9. The detection end of the displacement sensor 8 to be tested is the pull rod 9, and the sliding block 6 is connected to the pull rod 9 through a connecting member 7.

[0027] See also Figure 1 In some embodiments of the present utility model, a mounting plate 2 is provided on the base 1 , and the driving member 3 is arranged on the mounting plate 2 .

[0028] The mounting plate 2 is vertically arranged on the base 1 , the driving member 3 is arranged on a side of the mounting plate 2 away from the screw rod 5 , a through hole is arranged on the mounting plate 2 , and the output end of the driving member 3 is connected to the screw rod 5 through the through hole.

[0029] See also Figure 1 In some embodiments of the present invention, the driving member 3 is a stepping motor. The stepping motor can accurately control the rotation speed of the screw rod 5, so that the sliding block 6 driven by the screw rod 5 can obtain an accurate distance value each time it moves, and together with the corresponding voltage value, the test accuracy meets the specification requirements.

[0030] See also Figure 1 In some embodiments of the utility model, a fixing seat 4 is further provided on the base 1, and both ends of the driving member 3 are rotatably connected to the fixing seat 4. The fixing seat 4 is used to limit the screw rod 5, and a bearing is provided between the screw rod 5 and the fixing seat 4 to reduce the friction between the fixing seat 4 and the screw rod 5.

[0031] The above are only preferred embodiments of the present invention, and do not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the utility model concept, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A displacement sensor accuracy testing device, characterized in that: It comprises a base, a driving member, a screw rod and a sliding block. A displacement sensor to be measured is installed on the base. The driving member is connected to the screw rod. The screw rod is rotatably connected to the sliding block and is connected to the displacement sensor to be measured through the sliding block.

2. The displacement sensor accuracy testing device according to claim 1, characterized in that: The displacement sensor to be tested is provided with a pull rod, and the sliding block is connected to the pull rod.

3. The displacement sensor accuracy testing device according to claim 1, characterized in that: A mounting plate is provided on the base, and the driving member is arranged on the mounting plate.

4. The displacement sensor accuracy testing device according to claim 3, characterized in that: The driving member is located at a side of the mounting plate away from the screw rod, and the driving member passes through the mounting plate and is connected to the screw rod.

5. The displacement sensor accuracy testing device according to claim 1, characterized in that: The driving component is a stepping motor.

6. The displacement sensor accuracy testing device according to claim 1, characterized in that: A fixing seat is also provided on the base, and both ends of the screw rod are rotatably connected to the fixing seat respectively.

7. The displacement sensor accuracy testing device according to claim 6, characterized in that: A bearing is arranged between the screw rod and the fixing seat.

Images