Static verification device for eddy current sensor

Abstract

The utility model discloses an eddy current sensor static calibration device, which comprises a base plate, two groups of position adjusting assemblies, a pressure adjusting assembly and a dial indicator, the base plate is provided with a sliding chute, and the two groups of position adjusting assemblies are respectively and movably connected to two ends of the sliding chute. The dial indicator is detachably connected with one of the position adjusting assemblies, the pressure adjusting assembly is located between the two position adjusting assemblies, and the pressure adjusting assembly is in contact with the dial indicator; through the arrangement of the pressure adjusting assembly, the adjustment of the pressure applied to the eddy current sensor can be rapidly completed through the longitudinal adjusting wheel, and the pressure with a set value can be obtained through a method of obtaining the accurate value of the distance change of the dial indicator in a manner of matching with the dial indicator. And the static verification process of the eddy current sensor is completed by comparing the pressure under the set numerical value with a voltage numerical value output by the eddy current sensor.

Description

Technical Field

[0001] The utility model relates to the technical field of eddy current sensors, in particular to a static calibration device for eddy current sensors. Background Art

[0002] Eddy current sensor is a non-contact linear measurement tool, widely used in power, petroleum, chemical, metallurgy and other industries;

[0003] One of the static verification methods of eddy current sensors is to apply external force to the eddy current sensors and observe the changes in their voltage under different pressures to determine whether the eddy current sensors are compliant. Since the above verification method requires applying multiple pressures with relatively accurate values ​​and observing the pressure changes of the eddy current sensors at the same time, most of the workers on the eddy current sensor static verification assembly line do not have the relevant skills and knowledge;

[0004] In view of this, there is an urgent need for a static calibration device for an eddy current sensor that can solve the above-mentioned problem. Utility Model Content

[0005] The purpose of the utility model is to provide a static calibration device for an eddy current sensor which can solve the above-mentioned problem.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solution: a static calibration device for an eddy current sensor, comprising:

[0007] A base plate, two sets of position adjustment components, a pressure adjustment component and a micrometer. The base plate is provided with a slide groove. The two sets of position adjustment components are movably connected to both ends of the slide groove. The micrometer is detachably connected to one of the sets of position adjustment components. The pressure adjustment component is located between the two sets of position adjustment components, and the pressure adjustment component is in contact with the micrometer.

[0008] Preferably, the position adjustment component includes an adjustment plate, an inner slider, an outer slider and a position adjustment bolt. The adjustment plate is provided with a penetration hole and a locking bolt. The lower end of the locking bolt penetrates the top wall of the adjustment plate and is located in the penetration hole, and the locking bolt is threadedly connected to the adjustment plate. The adjustment plate is fixedly connected to the outer slider, and the inner slider is located in the slide groove and is provided with a threaded groove. The position adjustment bolt passes through the outer slider and is threadedly connected to the threaded groove.

[0009] Preferably, the slide groove is a V-shaped inclined groove, and the side walls of the outer sliding block and the inner sliding block on the side in contact with the slide groove are provided with an inclined surface matching the slide groove.

[0010] Preferably, the pressure regulating assembly includes a rectangular block, an extrusion disk, an extrusion rod, a longitudinal adjustment wheel and a position limiting assembly. The rectangular block is provided with a longitudinal rectangular through groove and a transverse rectangular through groove. The longitudinal adjustment wheel is located in the longitudinal rectangular through groove. One end of the extrusion rod is in contact with the measuring rod of the micrometer, and the other end is fixedly connected to the extrusion disk after passing through the rectangular block and the center position of the longitudinal adjustment wheel. The extrusion rod is slidably connected to the rectangular block, and the extrusion rod is threadedly connected to the center position of the longitudinal adjustment wheel. The position limiting assembly is movably connected to the rectangular block.

[0011] Preferably, the position limiting assembly includes a transverse adjustment wheel, a threaded rod and a position limiting slider, the transverse adjustment wheel is located in the transverse rectangular through groove, the position limiting slider is located in the slide groove, the lower end of the threaded rod is fixedly connected to the middle position of the position limiting slider, and the upper end of the threaded rod passes through the bottom wall of the rectangular block and is threadedly connected to the middle position of the transverse adjustment wheel.

[0012] Preferably, a threaded rod displacement cavity matching the threaded rod is provided on the top wall of the transverse rectangular through groove.

[0013] Preferably, the side walls of the rectangular block are provided with symmetrically positioned arc-shaped notches.

[0014] Preferably, the extrusion plate is made of bakelite material.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The setting of the pressure adjustment component can quickly adjust the pressure applied to the eddy current sensor through the longitudinal adjustment wheel. At the same time, by using the micrometer, the precise value of the micrometer distance change can be obtained to obtain a predetermined pressure value. The pressure at the predetermined value is compared with the voltage value output by the eddy current sensor to complete the static calibration process of the eddy current sensor. This method is not only simple to operate, but also relatively simple to determine whether the eddy current sensor is compliant. It is suitable for calibration personnel who lack relevant skills and knowledge. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of a static calibration device for an eddy current sensor;

[0018] Figure 2 It is a schematic diagram of the cross-sectional structure of the inner slider and the outer slider in the utility model;

[0019] Figure 3 It is a schematic diagram of the cross-sectional structure of the rectangular block in the utility model.

[0020] In the figure: 1. base plate; 10. slide groove; 2. position adjustment component; 20. adjustment plate; 200. penetration hole; 201. locking bolt; 21. inner slider; 210. threaded groove; 22. outer slider; 23. position adjustment bolt; 3. pressure adjustment component; 30. rectangular block; 300. longitudinal rectangular through groove; 301. transverse rectangular through groove; 3010. threaded rod displacement cavity; 302. arc notch; 31. extrusion disk; 32. extrusion rod; 33. longitudinal adjustment wheel; 34. position limiting component; 340. transverse adjustment wheel; 341. threaded rod; 342. position limiting slider; 4. micrometer;. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0022] Please see attached Figure 1-3 , a static calibration device for an eddy current sensor, comprising:

[0023] A base plate 1, two groups of position adjustment components 2, a pressure adjustment component 3 and a micrometer 4, the base plate 1 is provided with a slide groove 10, the two groups of the position adjustment components 2 are movably connected to the two ends of the slide groove 10, the micrometer 4 is detachably connected to one group of the position adjustment components 2, the pressure adjustment component 3 is located between the two groups of the position adjustment components 2, and the pressure adjustment component 3 is in contact with the micrometer 4.

[0024] Two sets of position adjustment components 2 are arranged at both ends of the base plate 1, one of which is used to fix the micrometer 4, and the other is used to cooperate with the pressure adjustment component 3 to complete the clamping of the eddy current sensor so as to perform static calibration on it later. By adopting the movable connection method of the slide groove 10, the position of the position adjustment component 2 and the pressure adjustment component 3 can be appropriately adjusted according to the external dimensions of the eddy current sensor, thereby expanding the applicability of the device.

[0025] Specifically, the position adjustment component 2 includes an adjustment plate 20, an inner slider 21, an outer slider 22 and a position adjustment bolt 23. The adjustment plate 20 is provided with a penetration hole 200 and a locking bolt 201. The lower end of the locking bolt 201 penetrates the top wall of the adjustment plate 20 and is located in the penetration hole 200. The locking bolt 201 is threadedly connected to the adjustment plate 20. The adjustment plate 20 is fixedly connected to the outer slider 22. The inner slider 21 is located in the slide groove 10 and is provided with a thread groove 210. The position adjustment bolt 23 passes through the outer slider 22 and is threadedly connected to the thread groove 210.

[0026] The inner slider 21 is located in the slide groove 10, and the outer slider 22 is located outside the slide groove. When adjustment is needed, the vertical position of the inner slider 21 is changed by screwing the position adjustment bolt 23 to enlarge the gap between it and the inner wall of the slide groove 10. At this time, the overall position of the position adjustment assembly 2 can be easily changed through the adjustment plate 20. After the adjustment is completed, the position of the inner slider 21 is adjusted through the position adjustment bolt 23 to lock the position of the adjustment plate 20.

[0027] Specifically, the slide groove 10 is a V-shaped inclined groove, and the side wall of the outer slider 22 and the inner slider 21 that are in contact with the slide groove 10 is provided with an inclined surface matching the slide groove 10; compared with the traditional convex slide groove, the V-shaped inclined groove is more stable, and the slider movably connected to it is less likely to shake due to external force.

[0028] Specifically, the pressure regulating assembly 3 includes a rectangular block 30, an extrusion plate 31, an extrusion rod 32, a longitudinal adjustment wheel 33 and a position limiting assembly 34. The rectangular block 30 is provided with a longitudinal rectangular through groove 300 and a transverse rectangular through groove 301. The longitudinal adjustment wheel 33 is located in the longitudinal rectangular through groove 300. One end of the extrusion rod 32 contacts the measuring rod of the micrometer 4, and the other end passes through the rectangular block 30 and the center position of the longitudinal adjustment wheel 33 and is fixedly connected to the extrusion plate 31. The extrusion rod 32 is slidably connected to the rectangular block 30, and the extrusion rod 32 is threadedly connected to the center position of the longitudinal adjustment wheel 33. The position limiting assembly 34 is movably connected to the rectangular block 30.

[0029] The position of the eddy current sensor can be fixed by the extrusion disk 31 and the adjustment plate 20 without the micrometer 4 installed. When the eddy current sensor is calibrated, first, an external voltmeter is connected to the eddy current sensor, and then the longitudinal adjustment wheel 33 is rotated, thereby driving the extrusion rod 32 to make a lateral displacement, driving the extrusion disk 31 to move and contact the eddy current sensor, and then the micrometer 4 can be adjusted by installing the locking bolt 201 provided on the adjustment plate 20 of the micrometer 4, so that the measuring rod of the micrometer 4 contacts the end of the extrusion rod 32 without the extrusion disk 31, and then the micrometer 4 is fixed again, and then the position of the extrusion disk 31 is moved by adjusting the longitudinal adjustment wheel 33, so that the extrusion disk 31 moves toward the direction of the eddy current sensor and gradually forms pressure, and at the same time, pay attention to the distance reading on the micrometer 4 and record the micrometer. Table 4 shows the voltage reading at a given value, and compares the voltage reading with the standard voltage. If it is within the allowable error range, it is compliant, otherwise it is considered non-compliant. For example, the compliance standard is as follows: when the reading on the micrometer is 2 units, the standard voltage is 5V, and when the reading on the micrometer is 3 units, the standard voltage is 7V. In actual measurement, when the micrometer is 2 units or 3 units during calibration, the measured voltage value is compared with the standard voltage value. If the measured voltage is within the standard voltage error range, the eddy current sensor is considered compliant, otherwise it is considered non-compliant. It should be noted that since the given pressure is fed back through the given distance on the micrometer 4, the threaded connection part of the longitudinal adjustment wheel 33 and the extrusion rod 32 should adopt fine thread, otherwise the error of the micrometer 4 will be too large.

[0030] Specifically, the position limiting assembly 34 includes a transverse adjustment wheel 340, a threaded rod 341 and a position limiting slider 342. The transverse adjustment wheel 340 is located in the transverse rectangular through slot 301, the position limiting slider 342 is located in the slide slot 10, the lower end of the threaded rod 341 is fixedly connected to the middle position of the position limiting slider 342, and the upper end thereof passes through the bottom wall of the rectangular block 30 and is threadedly connected to the middle position of the transverse adjustment wheel 340;

[0031] Taking into account the different sizes of eddy current sensors from different batches, it is necessary to readjust the position of the pressure regulating assembly 3 before calibrating different batches of eddy current sensors. When adjustment is needed, screw the lateral adjusting wheel 340. Since the threaded rod 341 cannot rotate, it can only move in the vertical direction. The lateral adjusting wheel 340 is used to move the threaded rod 341 downward to expand the gap between the position limiting slider 342 and the slide groove 10. Then, the rectangular block 30 is moved to adjust the position. After moving to the appropriate position, the position of the threaded rod 341 and the position limiting slider 342 is changed by the lateral adjusting wheel 340 to complete the position locking of the rectangular block 30 again.

[0032] Specifically, a threaded rod displacement cavity 3010 matching the threaded rod 341 is provided on the top wall of the transverse rectangular through groove 301; in order to avoid the situation where the threaded rod 341 contacts the top wall of the rectangular through groove 301 without completing position locking during movement, a threaded rod displacement cavity 3010 matching it is provided.

[0033] Specifically, the side wall of the rectangular block 30 is provided with symmetrically positioned arc-shaped notches 302 ; in order to facilitate the movement of the rectangular block 30 , the arc-shaped notches 302 are provided for easy handholding.

[0034] Specifically, the extrusion disk 31 is made of bakelite. Considering the material of the eddy current sensor itself, the extrusion disk 31 is not suitable for metal materials. Therefore, the extrusion disk 31 made of bakelite with obvious advantages is used.

[0035] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A static calibration device for an eddy current sensor, characterized in that: include: A base plate (1), two groups of position adjustment components (2), a pressure adjustment component (3) and a micrometer (4), wherein the base plate (1) is provided with a slide groove (10), the two groups of the position adjustment components (2) are movably connected to the two ends of the slide groove (10), the micrometer (4) is detachably connected to one group of the position adjustment components (2), the pressure adjustment component (3) is located between the two groups of the position adjustment components (2), and the pressure adjustment component (3) is in contact with the micrometer (4).

2. The eddy current sensor static calibration device according to claim 1, characterized in that: The position adjustment component (2) comprises an adjustment plate (20), an inner slider (21), an outer slider (22) and a position adjustment bolt (23); the adjustment plate (20) is provided with a through hole (200) and a locking bolt (201); the lower end of the locking bolt (201) penetrates the top wall of the adjustment plate (20) and is located in the through hole (200); the locking bolt (201) is threadedly connected to the adjustment plate (20); the adjustment plate (20) is fixedly connected to the outer slider (22); the inner slider (21) is located in the slide groove (10) and is provided with a thread groove (210); the position adjustment bolt (23) passes through the outer slider (22) and is threadedly connected to the thread groove (210).

3. The static calibration device for an eddy current sensor according to claim 2, characterized in that: The slide groove (10) is a V-shaped inclined groove, and the side walls of the outer sliding block (22) and the inner sliding block (21) that are in contact with the slide groove (10) are provided with inclined surfaces that match the slide groove (10).

4. The static calibration device for an eddy current sensor according to claim 1, characterized in that: The pressure regulating assembly (3) comprises a rectangular block (30), an extrusion plate (31), an extrusion rod (32), a longitudinal adjustment wheel (33) and a position limiting assembly (34); the rectangular block (30) is provided with a longitudinal rectangular through slot (300) and a transverse rectangular through slot (301); the longitudinal adjustment wheel (33) is located in the longitudinal rectangular through slot (300); one end of the extrusion rod (32) contacts the measuring rod of the micrometer (4); the other end passes through the rectangular block (30) and the center position of the longitudinal adjustment wheel (33) and is fixedly connected to the extrusion plate (31); the extrusion rod (32) is slidably connected to the rectangular block (30), and the extrusion rod (32) is threadedly connected to the center position of the longitudinal adjustment wheel (33); and the position limiting assembly (34) is movably connected to the rectangular block (30).

5. The eddy current sensor static calibration device according to claim 4, characterized in that: The position limiting assembly (34) comprises a transverse adjustment wheel (340), a threaded rod (341) and a position limiting slider (342); the transverse adjustment wheel (340) is located in the transverse rectangular through groove (301); the position limiting slider (342) is located in the slide groove (10); the lower end of the threaded rod (341) is fixedly connected to the middle position of the position limiting slider (342); and the upper end of the threaded rod (341) passes through the bottom wall of the rectangular block (30) and is threadedly connected to the middle position of the transverse adjustment wheel (340).

6. The static calibration device for an eddy current sensor according to claim 5, characterized in that: A threaded rod displacement cavity (3010) matching the threaded rod (341) is provided on the top wall of the transverse rectangular through slot (301).

7. The eddy current sensor static calibration device according to claim 4, characterized in that: The side wall of the rectangular block (30) is provided with arc-shaped notches (302) symmetrically positioned.

8. The static calibration device for an eddy current sensor according to claim 4, characterized in that: The extrusion plate (31) is made of bakelite material.

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