Miniature piezoelectric linear driver
A linear drive, piezoelectric device technology, applied in the direction of generator/motor, piezoelectric effect/electrostrictive or magnetostrictive motor, electrical components, etc., can solve the problem of small driving displacement, increasing driving force, power weight, etc. To solve the problem of high ratio, to achieve the effect of reducing processing accuracy and assembly requirements, realizing adjustment and simple structure
Inactive Publication Date: 2004-12-29
SHANGHAI JIAOTONG UNIV
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Problems solved by technology
[0003] Due to its high response frequency, high power-to-weight ratio, low energy consumption, low heat generation, and miniaturization, the biggest disadvantage of piezoelectric actuators is that the driving displacement is too small. However, piezoelectric actuators are still widely used in precision driving and control; The shape memory alloy driver has a high power-to-weight ratio and a small driving displacement, but its biggest disadvantages are: high energy consumption and low response frequency
The Forty-fifth Research Institute of the Ministry of Electronics Industry uses stepping motors and corresponding mechanisms to develop a micro-displacement drive that converts rotary motion into linear motion (patent publication number: 2161014). Since the core of the drive is a stepping motor, it is therefore Complex structure, difficult to miniaturize
The Institute of Optoelectronics Technology, Chinese Academy of Sciences applies a piezoelectric driver and develops a nano-stepping positioning driver using a mechanical and hydraulic two-stage stepping mechanism (invention patent publication number is 2457741). The driver uses a combination of mechanical and hydraulic pressure to increase the driving force For the target, the structure is complex, and it is difficult to meet the requirements of miniaturization
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[0017] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0018] like figure 1 As shown, the present invention mainly includes: a frame 1 , an axially polarized piezoelectric device 2 , a friction body 3 , a radially polarized piezoelectric device 4 , a dual-channel drive controller 5 , and a DC power supply 6 . The connection relationship of each component is: one end of the axially polarized piezoelectric device 2 is fixedly connected to the frame 1, and the other end is fixedly connected to the friction body 3; the radially polarized piezoelectric device 4 is sleeved on the friction body with a certain preload. body 3; the axially polarized piezoelectric device 2 and the radially polarized piezoelectric device 4 are connected to the dual-channel drive controller 5 respectively, and are controlled by the dual-channel drive controller 5; the dual-channel drive controller 5 is controlled by a DC T...
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The miniature bionic piezoelectric linear driver consists of axially polarizing piezoelectric device, radially polarizing piezoelectric device and friction body and realizes driving with the combination of double piezoelectric device of different polarizing directions and corresponding control. The axially polarizing piezoelectric device has one end fixed to the frame and the other end connected to the friction body; the radially polarizing piezoelectric device is sleeved to the friction body via certain pre-tensing force; and the two polarizing piezoelectric devices are controlled by the double-channel driving controller separately. The present invention has great driving stroke, simple structure and convenient regulation of driving force and driving step length in certain range, is easy to minimize.
Description
Technical field: [0001] The invention relates to a miniature piezoelectric linear driver, which is suitable for miniature, large stroke, submicron step distance, bidirectional linear drive, and belongs to the field of electromechanical technology. Background technique: [0002] With the development of modern industry and science, the requirements for the precision of electromechanical system drive and control, and the miniaturization of structure are getting higher and higher. As the key technology of precision or micro electromechanical The principle and its realization are directly related to the characteristics and functions of micro-electromechanical systems. Therefore, the research on new principles, new structures and their realization schemes of large stroke and micro-direct drive has become a key topic of research in the field of micro-mechanics in the world, and has become a micro-mechanical system. One of the important symbols of the development of electromechanica...
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IPC IPC(8): H02N2/04H02N2/06
Inventor 颜国正卢秋红丁国清颜德田
Owner SHANGHAI JIAOTONG UNIV