CN1182650C - Miniature bionical piezoelectric linear driver - Google Patents
Miniature bionical piezoelectric linear driver Download PDFInfo
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- CN1182650C CN1182650C CNB021371733A CN02137173A CN1182650C CN 1182650 C CN1182650 C CN 1182650C CN B021371733 A CNB021371733 A CN B021371733A CN 02137173 A CN02137173 A CN 02137173A CN 1182650 C CN1182650 C CN 1182650C
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Abstract
The present invention relates to a miniature bionic piezoelectric linear driver, which is composed of an axial polarization piezoelectric device, a radial polarization piezoelectric device and a friction body; drive is realized by combining and controlling double piezoelectric devices with different polarization directions; one end of the axial polarization piezoelectric device is fixedly connected with a machine frame, and the other end is fixedly connected with the friction body; the radial polarization piezoelectric device is sheathed on the friction body with certain prestressing force; the axial polarization piezoelectric device and the radial polarization piezoelectric device are respectively controlled by a double channel drive controller. The present invention has the advantages of large drive travel, simple structure and easy microminiaturization, and can regulate conveniently driving force and a driving pace in a certain range.
Description
Technical field:
The present invention relates to a kind of miniature piezoelectric type linear actuator, be applicable to that miniature, big stroke, submicron order step pitch, two-way linear drive, and belong to the mechanical ﹠ electrical technology field.
Background technology:
Modern industry, the reach of science, to Mechatronic Systems drive and the requirement of the microminiaturization of the precise treatment of control, structure more and more higher, as miniature, the big stroke of precision or Micro Electro Mechanical System key technology, accurate micro-stepping driver, its drive principle and realization thereof are directly connected to the characteristic and the function of Micro Electro Mechanical System, therefore, the research of big stroke, miniature direct driving new principle, new construction and implementation thereof has become the emphasis problem that micromachine field, the world is competitively studied, and has become one of important symbol of Micro Electro Mechanical System development.
Piezoelectric actuator since its response frequency height, power to weight ratio height, power consumption less, heating is little, Miniaturized, maximum deficiency is that drive displacement is too little, however, piezoelectric actuator still be widely used in accurate drive and control in; Marmen power to weight ratio height, drive displacement are too little, but its maximum deficiency is: power consumption is big, response frequency is low.Thereby utilizing piezoelectric actuator and advanced mechanism to constitute next-generation drive is one of current miniature, accurate research emphasis that drives.Photoelectric Technology Inst., Chinese Academy of Sciences adopts multi-disc to be developed into micro-displacement driver (patent publication No.: 2048242) through superposition bonding, positive and negative level piezoelectric ceramic piece in parallel, this driver has characteristics such as simple in structure, that the linearity good, resolution is high, bearing capacity is strong, but the driver drives displacement is too little.No.45 Inst., Ministry of Electronics Industry utilizes stepping motor and corresponding mechanism, be developed into the micro-displacement driver (patent publication No.: 2161014) that rotation motion is in line and moves, because the core of this driver is a stepping motor, thereby complex structure, be difficult to microminaturization.Photoelectric Technology Inst., Chinese Academy of Sciences's applying piezoelectric driver, adopt machinery and hydraulic two-stage walking machinery to be developed into nanometer stepping anchor drive (the patent of invention publication number is 2457741), driver adopts the compound mode of machinery and hydraulic pressure, to increase actuating force is target, complex structure is difficult to realize microminiaturized requirement.
Summary of the invention:
The objective of the invention is at the deficiencies in the prior art, on the basis that existing miniature, micro-stepping, two-way linear drive, provide a kind of miniature piezoelectric type linear actuator, simple in structure, realize microminaturization, to adapt to the actual needs of each side.
For achieving the above object, in technical scheme of the present invention, adopt two piezoelectric ceramic devices of different polarised directions to form two piezo-electric type drivers, utilize the inverse piezoelectric effect of piezoelectric, accurately control the order of two piezoelectric devices by the control voltage signal and be out of shape, the size of taking this to adjust stiction and inertia force realizes rectilinear motion.
The miniature piezoelectric type linear actuator of the present invention's design is made up of frame, radial polarization piezoelectric device, friction piece, radial polarised piezoelectric device, binary channels driving governor, DC power supply.One end and the frame of radial polarization piezoelectric device is connected, the other end and friction piece are connected; The radial polarised piezoelectric device is enclosed within on the friction piece with certain pretightning force; Radial polarization piezoelectric device, radial polarised piezoelectric device are linked respectively on the binary channels driving governor, and are controlled by the binary channels driving governor; The binary channels driving governor is by the DC power supply energy supply.
The present invention realizes its driving by the combination and the corresponding control of the two piezoelectric devices of different polarised directions.Radial polarization piezoelectric device and radial polarised piezoelectric device are respectively by same frequency and have the sawtooth waveforms of a phase bit corresponding relation and square-wave signal control.The radial polarised piezoelectric device is radially upheld under the control of binary channels driving governor, thrust between radial polarised piezoelectric device and the friction piece reduces, radial polarization piezoelectric device and friction piece be the rapid axial elongation under the control of binary channels driving governor, under frictional force between radial polarised piezoelectric device and the friction piece and a certain proportion of condition of two component movement inertia force, it is motionless that radial polarization piezoelectric device and coupled member keep; The radial polarised piezoelectric device is radial contraction under the control of binary channels driving governor, the controlled increase of thrust between radial polarised piezoelectric device and the friction piece, radial polarization piezoelectric device and friction piece slowly contraction under the control of binary channels driving governor that is connected with it, under the stiction effect, radial polarised piezoelectric device and coupled member are to step pitch of left movement.Repeat above-mentioned control procedure, the stroke that radial polarised piezoelectric device and the member that is connected with it will require to left movement; Change control frequency, the movement velocity of radial polarised piezoelectric device and coupled member changes.
The present invention has following advantage: (1) activation configuration is simple, and its key component is radial polarization piezoelectric device, radial polarised piezoelectric device and friction piece only, because the characteristic of piezoelectric device, this driver can be realized microminaturization.(2) active force between radial polarised piezoelectric device and the friction piece provides by the radial polarised piezoelectric device, thereby can be easily distortion by control radial polarised piezoelectric device realize the thrust that requires, the cooperation of system, machining accuracy and matching requirements all can reduce, and can realize the adjusting of actuating force within the specific limits easily.
Description of drawings:
Fig. 1 is a structural representation of the present invention.
As shown in Figure 1, the present invention mainly comprises: frame 1, radial polarization piezoelectric device 2, friction piece 3, radial polarised piezoelectric device 4, binary channels driving governor 5, DC power supply 6.
Fig. 2 is an operation principle sketch of the present invention.
As shown in Figure 2, (1) system is in initial condition; (2) radial polarised piezoelectric device 4 controlled radial are upheld, thrust between radial polarization piezoelectric device 2 and the radial polarised piezoelectric device 4 reduces, radial polarization piezoelectric device 2 extends fast, because the inertia of device, it is motionless that the radial polarised piezoelectric device 4 and the member that links thereof keep; (3) radial polarised piezoelectric device 4 controlled radial are shunk, the controlled increase of thrust between radial polarization piezoelectric device 2 and the radial polarised piezoelectric device 4, radial polarization piezoelectric device 2 slowly shrinks, under the stiction effect, radial polarised piezoelectric device 4 and the member that links thereof are to step pitch t of left movement.Repeat above-mentioned control procedure, the stroke that radial polarised piezoelectric device 4 and the member that links thereof will move and require; Change control frequency, the movement velocity of radial polarised piezoelectric device 4 and the member that links thereof changes.If change above-mentioned control timing, radial polarised piezoelectric device 4 and the member that links thereof will move right with step pitch and the speed that requires.
The control signal oscillogram that Fig. 3 drives left for the present invention.
Wherein, Fig. 3 (a) is radial polarization piezoelectric device 2 drive signal waveform of the present invention, and Fig. 3 (b) is radial polarised piezoelectric device 4 drive signal waveform of the present invention.
The control signal oscillogram that Fig. 4 drives to the right for the present invention.
Wherein, Fig. 4 (a) is radial polarization piezoelectric device 2 drive signal waveform of the present invention, and Fig. 4 (b) is radial polarised piezoelectric device 4 drive signal waveform of the present invention.
Embodiment:
Below in conjunction with accompanying drawing technical scheme of the present invention is described in detail.
As shown in Figure 1, the present invention mainly comprises: frame 1, radial polarization piezoelectric device 2, friction piece 3, radial polarised piezoelectric device 4, binary channels driving governor 5, DC power supply 6.The annexation of each parts is: an end and the frame 1 of radial polarization piezoelectric device 2 is connected, the other end and friction piece 3 are connected; Radial polarised piezoelectric device 4 is enclosed within on the friction piece 3 with certain pretightning force; Radial polarization piezoelectric device 2, radial polarised piezoelectric device 4 are linked respectively on the binary channels driving governor 5, and by 5 controls of binary channels driving governor; Binary channels driving governor 5 is by DC power supply 6 energy supplies.
The operation principle of miniature piezoelectric type linear actuator is: combination and corresponding control by the two piezoelectric devices of different polarised directions realize its driving.The concrete course of work is as follows: (1) system is in initial condition; (2) radial polarised piezoelectric device 4 is radially upheld under the control of binary channels driving governor 5, thrust between radial polarised piezoelectric device 4 and the friction piece 3 reduces, radial polarization piezoelectric device 2 and the friction piece 3 rapid axial elongation under the control of binary channels driving governor 5 that is connected with it, under frictional force between radial polarised piezoelectric device 4 and the friction piece 3 and a certain proportion of condition of two component movement inertia force, it is motionless that radial polarization piezoelectric device 2 and coupled member keep; (3) radial polarised piezoelectric device 4 radial contraction under the control of binary channels driving governor 5, the controlled increase of thrust between radial polarised piezoelectric device 4 and the friction piece 3, radial polarization piezoelectric device 2 and friction piece 3 slowly contraction under the control of binary channels driving governor 5 that is connected with it, under the stiction effect, radial polarised piezoelectric device 4 and coupled member are to step pitch t of left movement.Repeat above-mentioned control procedure, the stroke that radial polarised piezoelectric device 4 and the member that is connected with it will require to left movement; Change control frequency, the movement velocity of radial polarised piezoelectric device 4 and coupled member changes.If adopt control signal waveform shown in Figure 3, radial polarised piezoelectric device 4 and coupled member will move right with step pitch and the speed that requires.
Claims (1)
1, a kind of miniature piezoelectric type linear actuator, it is characterized in that forming two piezo-electric type drivers by two piezoelectric devices of different polarised directions, one end of radial polarization piezoelectric device (2) and frame (1) are connected, the other end and friction piece (3) are connected, radial polarised piezoelectric device (4) tightly is enclosed within on the friction piece (3), radial polarization piezoelectric device (2), the circular piezoelectric device (4) of radial polarised is connected with binary channels driving governor (5), same frequency and the sawtooth waveforms with phase place corresponding relation and square-wave signal control and the order distortion that produces by binary channels driving governor (5) respectively, realize rectilinear motion, binary channels driving governor (5) links to each other with DC power supply (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021371733A CN1182650C (en) | 2002-09-26 | 2002-09-26 | Miniature bionical piezoelectric linear driver |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021371733A CN1182650C (en) | 2002-09-26 | 2002-09-26 | Miniature bionical piezoelectric linear driver |
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| Publication Number | Publication Date |
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| CN1404210A CN1404210A (en) | 2003-03-19 |
| CN1182650C true CN1182650C (en) | 2004-12-29 |
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| CNB021371733A Expired - Fee Related CN1182650C (en) | 2002-09-26 | 2002-09-26 | Miniature bionical piezoelectric linear driver |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100547899C (en) * | 2006-12-15 | 2009-10-07 | 中国科学技术大学 | Dual voltage electrical body nano positioning and voltage electrical driver, its control method and controller |
| CN104022682B (en) * | 2014-06-25 | 2016-05-25 | 哈尔滨工业大学 | Bending vibration composite mode foot formula piezoelectric actuator across yardstick driving method |
| CN111973338B (en) * | 2020-08-31 | 2021-06-15 | 哈尔滨工业大学 | Piezoelectric inertia driven two-degree-of-freedom coupling retinal detachment feeding mechanism |
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Granted publication date: 20041229 Termination date: 20100926 |