CN215725681U - Displacement measuring device for piezoelectric ceramic driver - Google Patents
Displacement measuring device for piezoelectric ceramic driver Download PDFInfo
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- CN215725681U CN215725681U CN202121375877.0U CN202121375877U CN215725681U CN 215725681 U CN215725681 U CN 215725681U CN 202121375877 U CN202121375877 U CN 202121375877U CN 215725681 U CN215725681 U CN 215725681U
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- piezoelectric ceramic
- driver
- ceramic driver
- outer frame
- strain gauge
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Abstract
The utility model discloses a displacement measuring device of a piezoelectric ceramic driver, which comprises the piezoelectric ceramic driver and an integrally formed outer frame, wherein the bottom of the outer frame is provided with an end face, the top of the outer frame is provided with a screw hole, a stud is arranged in the screw hole, one end of the piezoelectric ceramic driver is connected with the end face, the other end of the piezoelectric ceramic driver is connected with the stud, at least two supporting bars are uniformly distributed between the top and the bottom of the outer frame, the position, opposite to the supporting bars, of the outer frame is provided with a weak part for absorbing deformation, and a resistance strain gauge is arranged on the weak part; the utility model utilizes the piezoelectric ceramic driver to push the weak part to generate deformation, the high-precision strain gauge is pasted at the weak part of the outer frame to measure displacement, and the torsional strength of the piezoelectric ceramic driver can be greatly improved.
Description
Technical Field
The utility model relates to the technical field of classified piezoelectric ceramic closed-loop control, in particular to a displacement measuring device of a piezoelectric ceramic driver.
Background
When the piezoelectric ceramic driver utilizes the inverse piezoelectric effect to generate displacement, the piezoelectric ceramic driver has hysteresis and creep errors. In order to make the displacement generated by the piezoelectric ceramic driver more accurate, closed-loop control of position feedback is required. A sensor suitable for measuring a piezo ceramic actuator is a resistive strain gauge. However, the high-precision resistance strain gauge is small in size, and the length of the piezoelectric ceramic actuator is often several times to tens of times of that of the high-precision resistance strain gauge. The piezoelectric ceramic driver is formed by bonding a plurality of ceramic surfaces, and the characteristics of each ceramic plate are often inconsistent. One high-precision strain gauge can only cover a plurality of ceramic plates, so that errors can be generated during measurement. And the resistance strain gauge is not suitable for a non-rectangular piezoelectric ceramic driver such as a circular driver.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems in the prior art, the utility model aims to provide a displacement measuring device of a piezoelectric ceramic driver.
In order to achieve the purpose, the utility model adopts the technical scheme that: the utility model provides a piezoceramics driver displacement measurement device, includes piezoceramics driver and integrated into one piece's frame, the bottom of frame is equipped with the terminal surface, and the top of frame is equipped with the screw, be equipped with the double-screw bolt in the screw, the one end of piezoceramics driver with the terminal surface is connected, the other end of piezoceramics driver with the double-screw bolt is connected, the equipartition has two at least support bars between the top of frame and the bottom, on the frame with the position that the support bar is relative is equipped with and is used for inhaling the weak part that receives the deformation, be equipped with resistance strain gauge in the weak part.
As a further improvement of the present invention, two ends of the piezoelectric ceramic actuator are connected to the end face and the stud by bonding.
As a further improvement of the present invention, the resistance strain gauge is provided on the weak portion by being bonded thereto.
As a further improvement of the utility model, the number of the supporting strips and the number of the weak parts are two.
As a further improvement of the present invention, the support bar is provided on the outer frame inside the weak portion.
The utility model has the beneficial effects that:
the utility model utilizes the pushing of the piezoelectric ceramic driver to generate displacement, utilizes the high-precision resistance strain gauge to measure the deformation, has higher measurement precision, and can integrally obtain better shearing resistance and torsional strength.
Drawings
FIG. 1 is a schematic structural diagram of an outer frame according to an embodiment of the present invention;
fig. 2 is a schematic overall structure diagram of the embodiment of the present invention.
Reference numerals:
1. the device comprises an outer frame, 1-1 parts of a weak part, 1-2 parts of a supporting strip, 1-3 parts of a screw hole, 1-4 parts of an end face, 2 parts of a resistance strain gauge, 3 parts of a piezoelectric ceramic driver, 4 parts of a stud.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Examples
As shown in fig. 1 and fig. 2, a displacement measuring device for a piezoelectric ceramic driver comprises an integrally formed outer frame 1, two resistance strain gauges 2, a piezoelectric ceramic driver 3 and a stud 4; the upper end of the outer frame which is integrally formed is provided with a screw hole 1-3, two supporting strips 1-2 and two weak parts 1-1 which absorb deformation, and the lower end of the piezoelectric ceramic driver 3 is bonded at the center of the end surface 1-4.
During assembly, voltage is applied to the piezoelectric ceramic driver 3 to enable the piezoelectric ceramic driver 3 to be in the shortest state, glue is coated on two ends of the piezoelectric ceramic driver 3, the piezoelectric ceramic driver 3 is placed in the middle of the outer frame 1, the stud 4 is screwed into the screw hole 1-3 of the outer frame 1 and is in butt joint with the upper end of the piezoelectric ceramic driver 3 and well adhered, finally the resistance strain gauge 2 is adhered to the two weak portions 1-1, the piezoelectric ceramic driver 3 pushes the weak portions 1-1 to intensively deform, and the resistance strain gauge 2 measures deformation of the weak portions 1-1. The supporting strips 1-2 and the weak parts 1-1 on the two sides form a structure similar to a triangle, so that the weak parts can be in a more stable state like a bow and an arrow and cannot be bent inwards or outwards, the measuring result is more accurate, and the device can be suitable for piezoelectric ceramic drivers 3 in various shapes.
The resistance strain gauge 2 forms a bridge circuit, and the bridge circuit is subjected to signal conditioning by using an instrument amplifying circuit, so that a voltage quantity corresponding to the displacement quantity of the device is obtained. And closed-loop control is performed by using a PID algorithm, so that accurate displacement control is obtained, and the hysteresis and creep errors of the piezoelectric ceramic driver are overcome.
The above-mentioned embodiments only express the specific embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (5)
1. The utility model provides a piezoceramics driver displacement measurement device, its characterized in that, frame including piezoceramics driver and integrated into one piece, the bottom of frame is equipped with the terminal surface, and the top of frame is equipped with the screw, be equipped with the double-screw bolt in the screw, piezoceramics driver's one end with the terminal surface is connected, piezoceramics driver's the other end with the double-screw bolt is connected, the equipartition has two at least support bars between the top of frame and the bottom, on the frame with the position that the support bar is relative is equipped with and is used for accepting the weak part that warp, be equipped with resistance strain gauge in the weak part.
2. The piezoceramic driver displacement measurement device of claim 1, wherein both ends of the piezoceramic driver are connected with the end face and the stud by means of bonding.
3. The piezoceramic driver displacement measurement device of claim 1, wherein the resistance strain gauge is provided on the weak portion by means of gluing.
4. The piezoceramic driver displacement measurement device of claim 1, wherein the number of the support bars and the weakened portions is two.
5. The piezoceramic driver displacement measurement device according to claim 1 or 4, wherein the support strip is provided on the outer frame inside the weakened portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121375877.0U CN215725681U (en) | 2021-06-21 | 2021-06-21 | Displacement measuring device for piezoelectric ceramic driver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121375877.0U CN215725681U (en) | 2021-06-21 | 2021-06-21 | Displacement measuring device for piezoelectric ceramic driver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215725681U true CN215725681U (en) | 2022-02-01 |
Family
ID=80043770
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121375877.0U Active CN215725681U (en) | 2021-06-21 | 2021-06-21 | Displacement measuring device for piezoelectric ceramic driver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215725681U (en) |
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2021
- 2021-06-21 CN CN202121375877.0U patent/CN215725681U/en active Active
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