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Acceleration sensor based on lone pole ultrasonic motor

An acceleration sensor, ultrasonic motor technology, applied in the direction of measurement of acceleration, speed/acceleration/shock measurement, instruments, etc., to achieve the effect of simplifying system components

Active Publication Date: 2020-12-25
恒有(苏州)精工机电有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the research on the application of isolated poles is mainly focused on the stable control of the speed of the ultrasonic motor. Due to the extremely high requirements for the sensitivity of the acceleration sensor and the speed of the test in the shock environment, no one has proposed the arc pole acceleration of the ultrasonic motor. sensor

Method used

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  • Acceleration sensor based on lone pole ultrasonic motor
  • Acceleration sensor based on lone pole ultrasonic motor
  • Acceleration sensor based on lone pole ultrasonic motor

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027]Such asfigure 1 with2As shown, the acceleration sensor of the present invention based on a unipolar ultrasonic motor includes a metal elastic body 1 and a piezoelectric ceramic 2 and a signal conditioning circuit 3. The piezoelectric ceramic generates A and B two-phase standing waves and meets the spatial phase difference π / 2. That is, there is a λ / 4 area in the middle of the A and B two-phase polarization regions, and the positively polarized λ / 4 isolated pole area is used to provide feedback signals. The lead wire is used as the positive electrode, and the metal elastomer is connected As the negative electrode, the wire is connected to the positive and negative poles of the signal conditioning circuit. The signal conditioning circuit 3 includes a charge amplifier circuit and a filter circuit. The charge amplifier circuit is directly connected to the isolated pole, and the filter circuit is connected to the charge amplifier circuit. By analyzing the signal The output signal ...

Embodiment 2

[0029]Such asimage 3 withFigure 4 As shown, on the basis of Embodiment 1, the charge amplifier circuit amplifies the weak electrical signal output by the isolated pole for subsequent processing by the filter circuit, which mainly includes operational amplifiers and feedback capacitors and resistors; the filter circuit removes the output of the isolated pole signal Noise signal, retaining effective acceleration signal, including operational amplifier and active filter composed of capacitor resistance; charge amplifier circuit includes operational amplifier OP07, operational amplifier protection resistors R1 and R2, feedback resistor Rf and feedback capacitor Cf; operational amplifier The positive and negative input terminals are respectively connected to the protection circuit R2 and R1, the other end of R2 is grounded, and the other end of R1 is connected to the isolated pole output signal. The feedback resistor and capacitors Rf and Cf are connected in parallel to the output termin...

Embodiment 3

[0031]Combinefigure 1 In the present invention, the isolated pole is proposed as an acceleration sensor, combined with a corresponding signal conditioning circuit, to detect and identify acceleration signals. The whole system block diagram consists of the stator (consisting of the metal elastic body 1 and the piezoelectric ceramic 2) and the signal conditioning circuit 3. Piezoelectric ceramics in accordance withfigure 2 The way of polarization treatment. The wire connected from the surface of the isolated pole is used as the positive electrode, and the wire connected from the metal elastic body is used as the negative electrode, respectively connected to the positive and negative electrodes of the signal conditioning circuit, and the acceleration signal is detected and identified by analyzing the output signal of the signal conditioning circuit.

[0032]image 3 Shows a schematic diagram of the charge amplifier circuit. The entire charge amplifier circuit consists of operational amplif...

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Abstract

The invention provides a solitary pole ultrasonic motor based acceleration transducer. The acceleration transducer includes a metal elastomer, piezoelectric ceramics and a signal conditioning circuit;the piezoelectric ceramics takes the solitary pole area lead-out wires of positive polarized lambda / 4 as a positive pole to provide feedback signals, takes the lead stretching out of the metal elastomer as a negative pole according to an area generating A and B phase standing waves and meeting spatial phase difference pi / 2, that is, the area leaving lambda / 4 in the middle of A and B polarized areas, and the positive and negative poles are respectively connected to the positive and negative poles of the signal conditioning circuit; the signal conditioning circuit includes a charge amplifier circuit and a filter circuit, the charge amplifier circuit is directly connected to a solitary pole, and the filter circuit is connected to the charge amplifier circuit; and acceleration signals can bedetected and identified under impact conditions by analyzing the output signals of the signal conditioning circuit. Thus, the problems of single solitary pole applications of ultrasonic motors can besolved, and system devices needed by the ultrasonic motors in impact environments during application can be simplified.

Description

Technical field[0001]The invention relates to an acceleration sensor, in particular to detecting and identifying an acceleration signal by using a isolated pole in an ultrasonic motor as an acceleration sensor.Background technique[0002]Ultrasonic Motor (USM) is a kind of using the inverse piezoelectric effect of piezoelectric ceramics to excite vibration in the ultrasonic frequency band in the elastic body, and form the movement of the particle with a specific track at a specific point or a specific area on the surface of the elastic body. Furthermore, through the friction coupling between the stator and the rotor, the microscopic motion of the particle is converted into the macroscopic motion of the rotor. It has a simple structure, flexible design, low speed and large torque / thrust, high power / torque density, high positioning accuracy, and fast response speed. It has the advantages of self-locking when power off, no electromagnetic interference and no electromagnetic interference....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01P15/097
CPCG01P15/097
Inventor 王炅
Owner 恒有(苏州)精工机电有限公司