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Solitary pole ultrasonic motor based acceleration transducer

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

Active Publication Date: 2019-01-04
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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  • Solitary pole ultrasonic motor based acceleration transducer
  • Solitary pole ultrasonic motor based acceleration transducer
  • Solitary pole ultrasonic motor based acceleration transducer

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Such as figure 1 and 2 As shown, the present invention is based on the acceleration sensor of the lone pole ultrasonic motor, including a metal elastic body 1, a piezoelectric ceramic 2, and a signal conditioning circuit 3; the piezoelectric ceramic generates A and B two-phase standing waves and satisfies 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 areas, and the positively polarized λ / 4 isolated pole area is used to provide feedback signals. The lead wire is used as the positive pole, and the metal elastic body is connected. The wire is used as the negative pole, and is connected with the positive and negative poles of the signal conditioning circuit respectively. The signal conditioning circuit 3 includes a charge amplifier circuit and a filter circuit. The charge amplifier circuit is directly connected with the isolated pole, and the filter circuit is connected with the charge amplifier circuit; ...

Embodiment 2

[0029] Such as image 3 and Figure 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 an operational amplifier and feedback capacitor and resistor; the filter circuit removes the weak electrical signal in the isolated pole signal The noise signal keeps the effective acceleration signal, including the active filter composed of the operational amplifier and the capacitor resistor; the charge amplification circuit includes the operational amplifier OP07, the operational amplifier protection resistors R1 and R2, the feedback resistor Rf and the feedback capacitor Cf; the operational amplifier The positive and negative input ends 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 output signal of the isolated pole. Feedback resistors and ...

Embodiment 3

[0031] combine figure 1 , the present invention proposes to use the lone pole as an acceleration sensor, combined with the corresponding signal conditioning circuit, to detect and identify the acceleration signal. The block diagram of the entire system consists of a stator (composed of a metal elastomer 1 and a piezoelectric ceramic 2 ) and a signal conditioning circuit 3 . Piezoelectric ceramics according to figure 2 The way of polarization processing. The wire connected to the surface of the isolated pole is used as the positive electrode, and the wire connected to the metal elastic body is used as the negative electrode, which are respectively connected to the positive and negative electrodes of the signal conditioning circuit. By analyzing the output signal of the signal conditioning circuit, the acceleration signal is detected and identified.

[0032] image 3 A schematic of the charge amplification circuit is shown. The whole charge amplification circuit consists of...

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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 using an isolated pole in an ultrasonic motor as an acceleration sensor to detect and identify acceleration signals. Background technique [0002] Ultrasonic Motor (USM) is a kind of inverse piezoelectric effect of piezoelectric ceramics, which excites vibration in the ultrasonic frequency range in the elastic body, and forms a particle motion with a specific trajectory at a specific point or area on the surface of the elastic body. Furthermore, through the frictional coupling between the stator and the rotor, the microscopic motion of the particle is converted into the macroscopic motion of the rotor. Power-off self-locking, no electromagnetic interference and not subject to electromagnetic interference and other advantages. [0003] In order to generate a two-phase standing wave on the surface of the stator of the rotary ultrasonic motor, the piezoelectric ceramic ring is usually conf...

Claims

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Application Information

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