Displacement sensor verification device

Abstract

The utility model relates to a displacement sensor verification device, which comprises a support, a sensor seat and a sensor force application assembly, the support comprises a support plate, the support plate is provided with a through hole for the induction end of a displacement sensor to extend out, the sensor force application assembly comprises a connecting cylinder and a screw rod mechanism, the connecting cylinder is used for being vertically supported on the support plate, and the screw rod mechanism is used for being vertically supported on the support plate. The lead screw mechanism comprises a manual lead screw and an outer barrel, the manual lead screw and the outer barrel are assembled in a spiral mode, and a pushing part is arranged at the end, facing the displacement sensor, of the manual lead screw and used for pushing the sensing end. The device is simple in structure and convenient to operate, the displacement sensor is fixed by means of the tool, the displacement sensor is pushed by means of the force application assembly to generate displacement, the displacement of the displacement sensor measured by the vernier caliper is compared with an electronic value of the displacement sensor for verification, and compared with a pure manual operation mode, the efficiency and verification accuracy can be improved.

Description

Technical Field

[0001] The utility model relates to the field of displacement sensor calibration, in particular to a displacement sensor calibration device. Background Art

[0002] The displacement sensor, also known as the linear sensor, is a linear device that belongs to metal induction. The function of the sensor is to convert various measured physical quantities into electrical quantities. In the production process, the measurement of displacement is generally divided into two types: measuring physical dimensions and mechanical displacement. After a period of use, it is necessary to conduct inspection and testing, and replace those that do not meet the requirements. At present, it is carried out manually. The operator manually stretches the pull rod of the sensor to obtain a changing electrical signal, and measures the size of the vernier card when the pull rod is stretched. After that, the corresponding relationship between the vernier card size and the electrical signal is used to determine whether the indication of the potentiometer is correct, so as to check whether the sensor meets the use requirements. The manual operation of stretching the pull rod is inconvenient, and the error of the measured data is relatively larger. Utility Model Content

[0003] The utility model aims to provide a displacement sensor calibration device, which can manually calibrate the displacement sensor with the aid of tooling.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] The displacement sensor calibration device includes a bracket, a sensor seat, and a sensor force-applying assembly. The bracket includes a support plate, and a through hole is provided on the support plate for the sensing end of the displacement sensor to extend. The sensor force-applying assembly includes a connecting tube and a screw mechanism. The connecting tube is used for vertical support on the support plate. The screw mechanism includes a manual screw and an outer cylinder. The manual screw is spirally assembled with the outer cylinder. A pushing portion is provided at one end of the manual screw facing the displacement sensor for pushing the sensing end.

[0006] Furthermore, one end of the lead screw away from the displacement sensor extends out of the outer cylinder and is provided with a plum blossom handle.

[0007] Furthermore, the bracket includes two vertical plates, and a connecting seat plate is provided at the bottom of the vertical plates for fixing on the test table, and the support plate is transversely arranged on the ends of the two vertical plates.

[0008] Furthermore, the sensor seat is located at the lower side of the support plate.

[0009] Furthermore, the connecting cylinder includes a movable cylinder body, an intermediate cylinder body, and a fixed cylinder body. The movable cylinder body includes a first nut arranged at the end of the outer cylinder body. The fixed cylinder body includes a fixed tube and a second nut arranged at one end of the fixed tube. The other end of the fixed tube is fixed at the through hole. Both ends of the intermediate cylinder body are respectively connected to the first nut and the second nut.

[0010] Beneficial effects of the utility model:

[0011] When the displacement sensor calibration device of the utility model is used: the displacement sensor to be tested is installed on the sensor seat, and the sensing section of the displacement sensor passes upward from the through hole of the support plate and enters the connecting tube. The displacement sensor is connected to a digital multimeter, which displays the displacement when the displacement sensor is touched. The manual screw 1 is rotated to drive the push part at the other end to push the displacement sensor downward. The displacement sensor 4 is compressed and a displacement will be generated, which is displayed by the digital multimeter. Then, the displacement of the displacement sensor is measured with a vernier caliper and compared with the digital multimeter to perform calibration to determine whether the accuracy of the displacement sensor 4 is qualified. The device has a simple structure and is easy to operate. With the help of tooling to assist in manual calibration, it can improve efficiency and calibration accuracy compared to pure manual operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a displacement sensor calibration device of the utility model;

[0013] Figure 2 This is a schematic diagram of the displacement sensor calibration device of the utility model after the bracket is removed;

[0014] Figure 3 It is a partial exploded schematic diagram of the displacement sensor calibration device of the utility model;

[0015] Figure 4 This is a cutaway view of the sensor force assembly.

[0016] The names corresponding to the marks in the figure are:

[0017] 11. Plum blossom handle; 12. Manual screw; 121. Push part; 13. Outer cylinder; 14. First nut; 15. Intermediate cylinder; 16. Second nut; 17. Fixed tube; 18. Flat nozzle; 21. Support plate; 22. Vertical plate; 23. Connecting seat plate; 3. Sensor seat; 4. Displacement sensor; 41. Induction section. DETAILED DESCRIPTION

[0018] 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 in the utility model, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the utility model.

[0019] Embodiments of the present utility model:

[0020] like Figure 1-Figure 4As shown, the displacement sensor calibration device includes a bracket, a sensor seat 3, and a sensor force-applying assembly, which is used to be fixed on the test table to play a supporting role. The sensor seat 3 is used to install the displacement sensor 4 to be tested, and the sensor force-applying assembly is used to apply force to one end of the displacement sensor 4 to deform it, thereby performing detection. The specific structure is as follows:

[0021] Figure 1 As shown, the bracket includes two vertical plates 22 and a support plate 21. A connecting seat plate 23 is provided at the bottom of the vertical plate 22 and fixed to the test table by screws or bolts. The support plate 21 is transversely arranged on the ends of the two vertical plates 22. A through hole is provided on the support plate 21 for the sensing end of the displacement sensor 4 to extend. In this embodiment, the sensor to be tested is the NS-WY02 series sensor, which has a slender deformation section. The above-mentioned sensor force-applying component applies axial force to the end of the deformation section.

[0022] The sensor seat 3 is located at the lower side of the support plate 21. In this embodiment, the sensor seat 3 is an L-shaped plate with screw holes arranged thereon.

[0023] The sensor force-applying assembly includes a connecting tube and a screw mechanism. The connecting tube is used to be vertically supported on the support plate 21. The screw mechanism includes a manual screw 12 and an outer cylinder 13. The manual screw 12 is screw-assembled with the outer cylinder 13. The end of the manual screw 12 facing the displacement sensor 4 is provided with a push portion 121 for pushing the sensing end of the displacement sensor 4. The end of the screw away from the displacement sensor 4 extends out of the outer cylinder 13 and is provided with a plum blossom handle 11 for easy manual screwing operation.

[0024] Figure 1 As shown, the connecting cylinder includes a movable cylinder, an intermediate cylinder 15, and a fixed cylinder, wherein the movable cylinder includes a first nut 14 disposed at the end of the outer cylinder 13. The fixed cylinder includes a fixed pipe 17 and a second nut 16 disposed at one end of the fixed pipe 17, and the other end of the fixed pipe 17 is fixed at the through hole. The two ends of the intermediate cylinder 15 are connected to the first nut 14 and the second nut 16 respectively. In general, the connecting cylinder principle is a common pipe joint connection method. Figure 4 As shown, the end of the outer cylinder 13 has a flat nozzle 18 with a small diameter, which is used to be sleeved with the first nut 14. The end of the flat nozzle 18 has a limit ring to prevent the first nut 14 from coming out. The first nut 14 can rotate so as to be threadedly connected with one end of the intermediate cylinder 15. The fixed cylinder is similar, the second nut is sleeved on the fixed tube 17, and the fixed tube 17 can also be called a flat nozzle. The second nut 16 is sleeved on the fixed tube 17 and can rotate relative to it to be threadedly connected with the other end of the intermediate cylinder 15.

[0025] When the displacement sensor calibration device of the utility model is used: the displacement sensor 4 to be tested is installed on the sensor seat 3, and the slender sensing section 41 passes upward from the through hole of the support plate 21 and enters the connecting tube. The displacement sensor 4 is connected to a digital multimeter, which displays the displacement when the displacement sensor 4 is touched. The initial position of the displacement sensor 4 is measured using a vernier caliper. The plum blossom handle 11 at the end of the manual screw 12 is rotated to drive the push part 121 at the other end to push the displacement sensor 4 downward. The displacement sensor 4 will produce a displacement under pressure, which is displayed by the digital multimeter. Then use a vernier caliper to measure the displacement of the displacement sensor 4, and compare it with the digital multimeter to perform a calibration to determine whether the accuracy of the displacement sensor 4 is qualified. If two people cooperate, the initial position is not measured with a vernier caliper at first. One person directly screws the lead screw while the other person holds a vernier caliper. The vernier caliper is attached to the sensor seat 3 (to reduce shaking when holding it by hand). The movable claw on the vernier caliper abuts against the end of the displacement sensor 4. When the displacement sensor 4 is compressed, the claw of the vernier caliper is synchronously driven to move, and the displacement can be read. The principle of the displacement sensor 4 is not repeated here. It is a prior art. When one end of the displacement sensor 4 is subjected to force, the other end can generate displacement detected by the caliper.

Claims

1. A displacement sensor calibration device, characterized in that: It includes a bracket, a sensor seat, and a sensor force-applying assembly. The bracket includes a support plate. The support plate is provided with a through hole for the sensing end of the displacement sensor to extend out. The sensor force-applying assembly includes a connecting tube and a screw mechanism. The connecting tube is used for vertical support on the support plate. The screw mechanism includes a manual screw and an outer cylinder. The manual screw is spirally assembled with the outer cylinder. The end of the manual screw facing the displacement sensor is provided with a pushing portion for pushing the sensing end.

2. The displacement sensor calibration device according to claim 1, characterized in that: One end of the lead screw away from the displacement sensor extends out of the outer cylinder and is provided with a plum blossom handle.

3. The displacement sensor calibration device according to claim 1, characterized in that: The bracket comprises two vertical plates, the bottom of which is provided with a connecting seat plate for fixing on the test table, and the supporting plate is transversely arranged on the ends of the two vertical plates.

4. The displacement sensor calibration device according to claim 3, characterized in that: The sensor seat is located at the lower side of the supporting plate.

5. The displacement sensor calibration device according to claim 2, characterized in that: The connecting cylinder includes a movable cylinder body, an intermediate cylinder body, and a fixed cylinder body. The movable cylinder body includes a first nut arranged at the end of the outer cylinder body. The fixed cylinder body includes a fixed tube and a second nut arranged at one end of the fixed tube. The other end of the fixed tube is fixed at the through hole. Both ends of the intermediate cylinder body are respectively connected to the first nut and the second nut.

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