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A mems microstructure four-axis base excitation device based on piezoelectric ceramics

A technology of piezoelectric ceramics and excitation devices, which is applied in the direction of measuring devices, machine/structural component testing, vibration testing, etc., and can solve the problem of inaccurate pre-tightening force or output force of piezoelectric ceramics, inflexibility, and increased error in measurement results And other problems, to avoid the interference of the pressure sensor, the adjustment process is smooth, and the effect of reducing the shear force

Inactive Publication Date: 2019-10-18
BOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] 2. There is no direct connection between the upper connection block and the lower connection block and the sleeve, but are installed in the sleeve in turn by means of clearance fit. If the parallelism error of the two working surfaces of the stacked piezoelectric ceramics is large , there is not enough space to adjust the movable base structure;
[0007] 3. The pressure sensor is installed at the bottom of the lower connecting block. Since the movable base structure adjusts itself, there is a certain inclination between the bottom of the lower connecting block and the working surface of the piezoelectric ceramic, so the pre-tightening force measured by the pressure sensor Or the output force of piezoelectric ceramics is not accurate; in addition, if the movable base structure causes the upper coupling block or the lower coupling block to contact the sleeve after adjustment, the error of the measurement result will further increase;
[0009] 5. In this device, gaskets of different thicknesses are used to change the magnitude of the pre-tightening force applied to the stacked piezoelectric ceramics, which makes the adjustment process complicated and not flexible enough

Method used

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  • A mems microstructure four-axis base excitation device based on piezoelectric ceramics
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  • A mems microstructure four-axis base excitation device based on piezoelectric ceramics

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Embodiment Construction

[0036] Such as Figure 1 to Figure 5 As shown, the present invention relates to a MEMS microstructure four-axis base excitation device based on piezoelectric ceramics, comprising a hollow sleeve 1, in which a stacked piezoelectric ceramics 10, a pressure sensor 11 and a The upper coupling block 13 , the steel ball 14 and the lower coupling block 15 form a movable base, and an elastic support 6 and a MEMS microstructure 4 are arranged on the sleeve 1 .

[0037] An annular top plate 2 and a bottom plate 3 are respectively fixed on the upper surface and the bottom surface of the sleeve 1 by bolts, and the MEMS microstructure 4 is mounted on the annular top plate 2 through an elastic support 6 . The elastic support includes a square base plate 602 and four support arms 601 uniformly distributed around the circumference, each support arm 601 is composed of a first connecting arm 6011, a second connecting arm 6012, and a third connecting arm 6013 which are vertically connected in se...

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Abstract

The invention discloses a MEMS microstructure four-axis base excitation device based on piezoelectric ceramics, which includes a sleeve, piezoelectric ceramics, a pressure sensor, an upper connection block, a steel ball, a lower connection block, an elastic support and a MEMS microstructure ;In the lower part of the sleeve, an electric screw drive mechanism is installed to drive the lower connecting block to move; on the opposite surfaces of the upper connecting block and the lower connecting block, there are respectively conical grooves and spherical grooves, piezoelectric ceramic clips The sleeve is held between the pressure sensor and the elastic support; guide shafts are evenly distributed along the circumference of the sleeve; sliding seats are respectively arranged on the guide shafts, and the upper coupling block and each sliding seat are respectively connected by tension springs. The device can apply different sizes of pre-tightening force to the stacked piezoelectric ceramics, and at the same time make the measured value of the pre-tightening force more accurate, and can make the adjustment process of compensating the parallelism error of the two working surfaces of the stacked piezoelectric ceramics more efficient. Smooth and smooth, it can avoid the falling off of the micro-device used in the test, and it is convenient to test the dynamic characteristic parameters.

Description

technical field [0001] The invention belongs to the technical field of micromechanical electronic systems, in particular to a MEMS microstructure four-axis base excitation device based on piezoelectric ceramics. Background technique [0002] Due to the advantages of low cost, small size and light weight, MEMS microdevices have broad application prospects in many fields such as automobile, aerospace, information communication, biochemistry, medical treatment, automatic control and national defense. For many MEMS devices, the micro-displacement and micro-deformation of their internal microstructures are the basis for the realization of device functions. Therefore, accurate testing of dynamic characteristic parameters such as the amplitude, natural frequency, and damping ratio of these microstructures has become the key to developing MEMS products. important content. [0003] In order to test the dynamic characteristic parameters of the microstructure, it is first necessary to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M7/02
Inventor 佘东生魏泽飞魏洪峰张博王春杰巫庆辉
Owner BOHAI UNIV
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