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Self-sensing driving device

A driving device and self-sensing technology, applied in the direction of measuring device, electric device, generator/motor, etc., can solve the problem of lack of integration of the driving system, and achieve the effect of wide application value, small size and high integration degree

Inactive Publication Date: 2011-07-13
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The drive system is not integrated

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] like figure 1 As shown, this embodiment includes: a sleeve 1, an output rod 5, a guide mechanism 6, a thrust piezoelectric sensor body 7 and a telescopic drive device 8, wherein: the guide mechanism 6 is movably arranged in the sleeve 1, and the thrust piezoelectric sensor The sensing body 7 is fixedly connected with the telescopic driving device 8 , the middle part of the output rod 5 is fixedly connected with the guide mechanism 6 and the end is connected with the thrust piezoelectric sensing body 7 .

[0021] like figure 2 As shown, the thrust piezoelectric sensing body 7 and the telescopic driving device 8 can also exchange positions.

[0022] The working process of the present embodiment is: when the telescopic drive device 8 is externally excited, such as the magnetostrictive drive device 8 is excited by an external electromagnetic field, it will be deformed and elongated. Because the lower end of the telescopic drive device 8 is fixed, its elongation The amoun...

Embodiment 2

[0025] like image 3 As shown, the sleeve 1 described in this embodiment is provided with a magnetostrictive body 2 and a displacement piezoelectric sensor 3, wherein: the magnetostrictive body 2 and the displacement piezoelectric sensor 3 are connected in series to the sleeve 1 and parallel to the guide mechanism 6, the magnetostrictive body 2 is in sliding contact with the output rod 5.

[0026] A permanent magnet 4 is arranged between the output rod 5 and the guide mechanism 6 .

[0027] The working process of the present embodiment is: when the telescopic drive device 8 is externally excited, such as the magnetostrictive drive device 8 is excited by an external electromagnetic field, it will be deformed and elongated. Because the lower end of the telescopic drive device 8 is fixed, its elongation The amount will be transmitted to the output rod 5 through the thrust piezoelectric sensing body 7 fixedly connected with it, and the output rod 5 will drive the guide mechanism ...

Embodiment 3

[0030] like Figure 4 As shown, a bias permanent magnet 9 is provided between the magnetostrictive body 2 and the housing 1 .

[0031] The working process of this embodiment is the same as that of Embodiment 2, except that a bias permanent magnet 9 is arranged between the magnetostrictive body 2 and the housing 1 structurally. The bias permanent magnet 9 has the capability of pre-biasing the magnetostrictive body 2 to its linear expansion and contraction range. Under this structure, the driving displacement sensing that can be realized has higher sensitivity and more accurate displacement sensing.

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Abstract

The invention provides a self-sensing driving device, which belongs to the technical field of precise detection. The self-sensing driving device comprises a sleeve, an output rod, a guiding mechanism, a thrust piezoelectric sensing body and a telescopic driving device. The guiding mechanism is movably arranged inside the sleeve; the thrust piezoelectric sensing body is fixedly connected with the telescopic driving device; and the middle part of the output rod is fixedly connected with the guiding mechanism, and the tail end of the output rod is connected with the thrust piezoelectric sensing body or the telescopic driving device. The self-sensing driving device has the capability of simultaneously sensing driving displacement and a driving load which are generated by a driver, and the precise driving of the driver under the closed loop control can be realized by feedback application of a sensing signal of the driving displacement or the driving load. The driver has high integration degree, a compact in structure, high structural intensity, and is sensitive and precise in sensing and driving. The driver is particularly suitable to be developed into a precise driver and a precise motor.

Description

technical field [0001] The invention relates to a device in the technical field of precision detection, in particular to a self-sensing driving device. Background technique [0002] The traditional displacement driver can usually only realize the linear driving function, and its driving displacement detection usually requires additional sensing devices to realize. For years of intelligent material actuators such as magnetostrictive actuators, although this material has both driving and sensing functional properties, in engineering practice, it is difficult to realize the decoupling and separation of magnetic signals, and the magnetic sensing The nonlinear problem is practically impossible for magneto-sensing. Therefore, it is still difficult to realize an integrated drive system that can simultaneously realize drive and sensing functions that can be applied in engineering practice. [0003] After searching the prior art, it is found that the current driving devices are mai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02N2/02G01B7/02G01L1/16
Inventor 杨斌堂孟光
Owner SHANGHAI JIAO TONG UNIV
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