CN219284459U - Eddy current sensor calibration device - Google Patents
Eddy current sensor calibration device Download PDFInfo
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- CN219284459U CN219284459U CN202223234262.3U CN202223234262U CN219284459U CN 219284459 U CN219284459 U CN 219284459U CN 202223234262 U CN202223234262 U CN 202223234262U CN 219284459 U CN219284459 U CN 219284459U
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Abstract
The utility model discloses an eddy current sensor calibration device, which belongs to the technical field of sensor calibration and comprises a box body (1), an eddy current sensor (2) and a standard motor (3), wherein the top of the box body (1) is provided with an opening, the standard motor (3) is arranged in the box body (1), an output shaft (4) of the standard motor (3) extends out of the left side wall of the box body (1), fixing plates (15) are arranged on the left side wall of the box body (1) at intervals, the fixing plates (15) are provided with through holes (16) matched with the eddy current sensor (2), the eddy current sensor (2) is detachably fixed in the through holes (16), and a probe of the eddy current sensor (2) is opposite to the end face of the output shaft (4); the eddy current sensor (2) is connected with the data processing device, and the device can accurately verify the detection accuracy of the eddy current sensor on torsional vibration and rotating speed, and ensure the reliability of the eddy current sensor.
Description
Technical Field
The utility model belongs to the technical field of sensor calibration, and particularly relates to an eddy current sensor calibration device.
Background
The important role of sensor technology in social development is along with the rapid development of scientific technology, and non-physical quantity testing and control technology is increasingly and widely applied to the technical fields of aerospace, aviation, transportation, metallurgy, mechanical manufacturing, petrochemical industry, light industry, technical supervision and testing and the like, and is gradually introduced into daily life of people.
The eddy current sensor adopts the principle of induced eddy current, and when a coil with high-frequency current approaches to the metal to be measured, the high-frequency electromagnetic field generated by the high-frequency current on the coil generates induced current on the surface of the metal, which is called eddy current electromagnetically. The eddy current effect is related to parameters such as the distance between the metals to be measured, the conductivity, the magnetic permeability, the geometry of the coil, the geometry size, the current frequency and the like.
The change of the distance between the measured metal and the sensor probe can be converted into the change of voltage or current through a circuit. The eddy current sensor is used for measuring parameters such as displacement, vibration and the like of a metal object according to the principle.
The electric vortex sensor is a non-contact measuring sensor with excellent performance, is suitable for directly monitoring the running states of machines such as vibration, displacement, rotating speed and the like, is widely used in state monitoring of large-scale rotating machines, and the output signal of the electric vortex sensor contains abundant unit running state information, is connected with related equipment, can realize the on-line detection and monitoring of parameters, can also be used for fault diagnosis, has small volume, compact and firm structure and corrosion resistance and wet heat resistance, and is widely applied to the industries such as electric power, petrochemical industry, machinery and the like, and is being familiar with and valued by engineering technicians.
Torsional vibration, among the mechanical vibrations, is a particular form of mechanical vibration that is commonly found in various rotary machines such as steam turbines, gas turbines, fans, automotive drive shafts, generators, engine crankshafts, compressors, and the like. The reason for this is that the rotor is not an absolute rigid body in practice, and is elastic, so that during rotation, the same shaft generates different instantaneous speeds at different positions, and torsional deformation, namely torsional vibration of the shaft system, occurs between the elastic components.
If the torsional vibration amplitude of the shafting is too large and the deformation exceeds the elastic limit, fatigue loss can be generated, the service life of the shafting is greatly influenced, if preventive measures cannot be timely taken, the shafting is in a torsional vibration state for a long time, the stability of the shafting operation is influenced by a light person, and the shafting fatigue damage is caused by a heavy person or even more serious disastrous accidents are caused, so that the shafting torsional vibration is necessary to monitor. The eddy current sensor can realize the detection function, but no device for specially checking the detection precision of the eddy current sensor to torsional vibration exists at present.
Disclosure of Invention
The utility model aims to solve the problems in the background art, and provides a checking device for an eddy current sensor, which can accurately check the accuracy of the eddy current sensor on torsional vibration detection and ensure the reliability of the eddy current sensor.
In order to achieve the technical purpose, the utility model adopts the following technical scheme:
the utility model provides an electric vortex sensor verifying attachment, includes box, electric vortex sensor and standard motor, box open-top, standard motor installs in the box, and the output shaft of standard motor stretches out from box left side wall, box left side wall is equipped with output shaft assorted vertical guide way; the left side wall of the box body is provided with fixing plates at intervals, the fixing plates are provided with through holes matched with the eddy current sensors, the eddy current sensors are detachably fixed in the through holes, and probes of the eddy current sensors are opposite to the end faces of the output shafts; the eddy current sensor is connected with the data processing device.
Preferably, the bottom of the box body is fixed with a lifting device, the lifting device comprises a base and a telescopic cylinder, the telescopic cylinder is fixed at the bottom of the box body, and the base is fixedly connected with the telescopic cylinder; the standard motor is fixed on the base.
Preferably, the output shaft end is provided with a disc coaxial therewith.
Preferably, the fixing plate is an L-shaped plate fixedly connected with the box body.
Preferably, the top of the box body is provided with a cover body matched with the top opening, and the right side wall of the box body is provided with a handle.
Preferably, the data processing device comprises a vibrator module, a high-frequency amplifier module, a detector module and a shaping circuit module which are sequentially connected, wherein the vibrator module is electrically connected with the eddy current sensor; the data processing device is mounted on the left side wall of the fixed plate.
Preferably, the side wall of the disc is provided with a plurality of grooves or protrusions.
Preferably, the eddy current sensor is screwed to the through hole.
The beneficial effects of the utility model are as follows:
1. the standard motor of the utility model rotates according to the set rotating speed, realizes fixed displacement, namely torsional vibration amplitude, verifies the precision according to the detection result of the eddy current sensor, has simple whole process, simple device structure and convenient use.
2. The output shaft of the standard motor is provided with the coaxial disc, so that the torsional vibration amplitude of the shaft can be amplified to a certain extent, the same torsional vibration can be realized at a lower rotating speed, and the energy is saved.
3. The side wall of the disc is provided with a plurality of bulges, the height of the disc is adjusted through the lifting device, the bulges on the side wall of the disc are opposite to the probe of the eddy current sensor, and the rotating speed of the output shaft is detected by the eddy current sensor, so that the detecting precision of the eddy current sensor to the rotating speed is checked, and the multiple purposes of the same device are realized.
Drawings
FIG. 1 is a schematic diagram of a first embodiment of the present utility model;
FIG. 2 is a schematic diagram of a second embodiment of the present utility model;
FIG. 3 is a schematic view of the internal structure of a device and a case according to an embodiment of the present utility model;
FIG. 4 is a left side view of the present utility model;
FIG. 5 is a schematic view of the interior of a second embodiment of the present utility model;
FIG. 6 is an enlarged view of a portion of FIG. 4 at A;
fig. 7 is a schematic structural view of the telescopic cylinder and the annular base.
Name of the label in the figure: 1. the device comprises a box body, 2, an eddy current sensor, 3, a standard motor, 4, an output shaft, 5, a disc, 6, a vibrator module, 7, a high-frequency amplifier module, 8, a detector module, 9, a shaping circuit module, 10, an annular base, 11, a telescopic cylinder, 12, a cover body, 13, a handle, 14, a guide groove, 15, a fixed plate, 16 and a through hole.
Detailed Description
Embodiments of the present utility model are described in further detail below with reference to the accompanying drawings.
It should be noted that the terms like "upper", "lower", "left", "right", "front", "rear", and the like are also used for descriptive purposes only and are not intended to limit the scope of the utility model in which the utility model may be practiced, but rather the relative relationship of the terms may be altered or modified without materially altering the teachings of the utility model.
Embodiment one:
as shown in fig. 1-3, the electric vortex sensor verification device comprises a box body 1, an electric vortex sensor 2 and a standard motor 3, wherein the top of the box body 1 is provided with an opening, the top of the box body 1 is provided with a cover body 12 matched with the opening, and the right side wall of the box body 1 is provided with a handle 13;
the standard motor 3 is arranged and fixed in the box body 1, and an output shaft 4 of the standard motor 3 extends out from the left side wall of the box body 1; the left side wall of the box body 1 is provided with fixing plates 15 at intervals, and the fixing plates 15 are parallel to the left side wall of the box body 1; the box body 1 and the fixing plate 15 can be fixed on the same plane plate, and the bottom plate of the box body 1 can also extend out of an L-shaped plate, the L-shaped plate extends out of the left side of the box body 1, and the vertical part of the L-shaped plate is the fixing plate 15;
the fixing plate 15 is provided with a through hole 16 matched with the eddy current sensor 2, the eddy current sensor 2 is connected with the through hole 16 through threads, the eddy current sensor 2 to be verified is convenient to replace, the tail end of the internal thread of the through hole 16 is at a certain distance from the rightmost end of the through hole, so that the eddy current sensor 2 cannot advance any more after being screwed by a certain distance, and the same distance between the probes of all the eddy current sensors 2 to be verified and the end face of the output shaft 4 is ensured; the eddy current sensor 2 is in transition fit with the through hole 16 without threaded connection, and an inward radial extending limiting ring is arranged at the rightmost end of the through hole 16, and the inner diameter of the limiting ring is not smaller than the inner diameter of the outer shell of the eddy current sensor 2 and is used for limiting the position of the eddy current sensor 2 and simultaneously not shielding the probe of the eddy current sensor 2, so that the probe of the eddy current sensor 2 is ensured to keep the same distance with the end face of the output shaft 4;
the probe of the eddy current sensor 2 is opposite to the end face of the output shaft 4, so that the polarization displacement of the output shaft 4 caused by torsional vibration is detected;
the electric vortex sensor 2 is connected with a data processing device fixed on the left side wall of the fixed plate 15, the data processing device comprises a vibrator module 6, a high-frequency amplifier module 7, a detector module 8 and a shaping circuit module 9 which are connected in sequence, and the vibrator module 6 is electrically connected with the electric vortex sensor 2; the detected signals are sequentially processed by the electric vortex sensor 2 through the vibrator module 6, the high-frequency amplifier module 7, the detector module 8 and the shaping circuit module 9 to obtain a final result, and the final result is compared with a standard result, so that whether the detection precision is qualified or not is judged.
The working principle of the checking device of the eddy current sensor provided by the utility model is as follows:
loading the eddy current sensor 2 to be detected into the through hole 16 (taking care of ensuring that the eddy current sensor 2 is propped against the rightmost end of the through hole 16 which can be reached), then starting the standard motor 3 to enable the output shaft 4 to rotate according to a set rotating speed so as to generate fixed torsional vibration, processing a detection signal by the eddy current sensor 2 through a data processing device to obtain a final detection result, and comparing the final detection result with the standard torsional vibration amplitude of the standard motor at the set rotating speed so as to judge the detection precision of the eddy current sensor 2; the detection can be performed at a plurality of different set rotating speeds of the standard motor, and the detection accuracy of the eddy current sensor 2 on the vibration amplitude is comprehensively checked.
Embodiment two:
as shown in fig. 4 to 6, the same parts as those of the first embodiment will not be described again, except that:
the lifting device is fixed at the bottom of the box body 1 and comprises a base 10 and a telescopic cylinder 11, the telescopic cylinder 11 is fixed at the bottom of the box body 1, and the base 10 is fixedly connected with the telescopic cylinder 11; the standard motor 3 is fixed on the base 10;
the left side wall of the box body 1 is provided with a vertical guide groove 14 matched with the output shaft 4, and when the lifting device adjusts the height of the standard motor 3, the output shaft 4 can move up and down in the guide groove 14;
the end part of the output shaft 4 is provided with a disc 5 coaxial with the output shaft, the side wall of the disc 5 is provided with a plurality of grooves or bulges (the bulges are not shown in the figure, and the disc 5 with the bulges on the side wall can directly adopt a disc gear);
in this embodiment, the height of the standard motor 3, that is, the heights of the output shaft and the disc 5 are adjusted through the lifting device, when the detection accuracy of the eddy current sensor 2 to the vibration amplitude needs to be checked, the disc 5 is adjusted to a specified height, so that the probe of the eddy current sensor 2 faces the end face of the disc 5, then the standard motor 3 is started, the amplitude of the end face of the disc 5 caused by torsional vibration of the output shaft is detected, and compared with a standard result, so that the detection accuracy of the eddy current sensor 2 to the vibration amplitude is checked;
meanwhile, the height of the disc 5 can be adjusted through the lifting device, so that the probe of the eddy current sensor 2 is opposite to the height of the groove on the side wall of the disc 5, and the rotating speed of the standard motor 3 is detected through pulse signals caused by the groove on the side wall when the disc 5 rotates, so that the detecting precision of the eddy current sensor 2 on the rotating speed is checked.
The above is only a preferred embodiment of the present utility model, and the protection scope of the present utility model is not limited to the above examples, and all technical solutions belonging to the concept of the present utility model belong to the protection scope of the present utility model. It should be noted that modifications and adaptations to the utility model without departing from the principles thereof are intended to be within the scope of the utility model as set forth in the following claims.
Claims (8)
1. An eddy current sensor verification device, which is characterized in that: the electric motor comprises a box body (1), an eddy current sensor (2) and a standard motor (3), wherein the top of the box body (1) is provided with an opening, the standard motor (3) is arranged in the box body (1), and an output shaft (4) of the standard motor (3) extends out from the left side wall of the box body (1); the left side wall of the box body (1) is provided with fixing plates (15) at intervals, the fixing plates (15) are provided with through holes (16) matched with the eddy current sensor (2), the eddy current sensor (2) is detachably fixed in the through holes (16), and a probe of the eddy current sensor (2) is opposite to the end face of the output shaft (4); the eddy current sensor (2) is connected with a data processing device.
2. The eddy current sensor calibration apparatus as recited in claim 1, wherein: the lifting device is fixed at the bottom of the box body (1) and comprises a base (10) and a telescopic cylinder (11), the telescopic cylinder (11) is fixed at the bottom of the box body (1), and the base (10) is fixedly connected with the telescopic cylinder (11); the standard motor (3) is fixed on the base (10); the left side wall of the box body (1) is provided with a vertical guide groove (14) matched with the output shaft (4).
3. The eddy current sensor calibration apparatus as recited in claim 2, wherein: the end part of the output shaft (4) is provided with a disc (5) coaxial with the output shaft.
4. The eddy current sensor calibration instrument of claim 3 wherein: the fixing plate (15) is an L-shaped plate fixedly connected with the box body (1).
5. The eddy current sensor calibration instrument of claim 4, wherein: the top of the box body (1) is provided with a cover body (12) matched with the top opening, and the right side wall of the box body (1) is provided with a handle (13).
6. The eddy current sensor calibration instrument of claim 5, wherein: the data processing device comprises a vibrator module (6), a high-frequency amplifier module (7), a detector module (8) and a shaping circuit module (9) which are sequentially connected, wherein the vibrator module (6) is electrically connected with the eddy current sensor (2); the data processing device is mounted on the left side wall of the fixed plate (15).
7. The eddy current sensor calibration instrument of claim 6, wherein: the side wall of the disc (5) is provided with a plurality of radial grooves or bulges.
8. The eddy current sensor calibration instrument of claim 7, wherein: the eddy current sensor (2) is connected with the through hole (16) through threads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223234262.3U CN219284459U (en) | 2022-12-02 | 2022-12-02 | Eddy current sensor calibration device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223234262.3U CN219284459U (en) | 2022-12-02 | 2022-12-02 | Eddy current sensor calibration device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219284459U true CN219284459U (en) | 2023-06-30 |
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ID=86927888
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223234262.3U Active CN219284459U (en) | 2022-12-02 | 2022-12-02 | Eddy current sensor calibration device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219284459U (en) |
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2022
- 2022-12-02 CN CN202223234262.3U patent/CN219284459U/en active Active
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