CN103744304A - Non-contact type micro scale rotating motor based on ultrasonic radiation torque - Google Patents
Non-contact type micro scale rotating motor based on ultrasonic radiation torque Download PDFInfo
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- CN103744304A CN103744304A CN201310706283.7A CN201310706283A CN103744304A CN 103744304 A CN103744304 A CN 103744304A CN 201310706283 A CN201310706283 A CN 201310706283A CN 103744304 A CN103744304 A CN 103744304A
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Abstract
The invention discloses a non-contact type micro scale rotating motor system based on an ultrasonic radiation torque. The non-contact type micro scale rotating motor system is composed of an industrial control computer with a PXI bus structure, a multichannel parameter program control adjustable ultrasonic signal generation card, a multichannel high-frequency linear power amplifier, a multichannel load automatic adapter and an ultrasonic energy transducer set. The industrial control computer provides an interactive interface allowing a user to set rotating speed and a load of the motor system. The multichannel parameter program control adjustable ultrasonic signal generation card is connected with an upper computer so that a corresponding initial driving voltage signal is generated according to a command of the upper computer. The initial driving voltage signal is processed via the multichannel high-frequency linear power amplifier and the multichannel load automatic adapter so that the ultrasonic energy transducer set is directly driven to generate a corresponding ultrasonic signal, and prospective ultrasonic radiation force and radiation torque fields are formed via sonic wave synthesis. The invention provides the non-contact type rotating motor under a micro scale so that defects that only linear motion can be realized by the micro motor based on material characteristics are broken through.
Description
Technical field
What the present invention relates to is a set of contactless microscale rotation motor system based on ultrasonic radiation moment, specifically, it relates to a kind of based on ultrasonic acoustic field synthetic technology, by adjusting amplitude, the phase place of each road ultrasonic signal, obtain a rotatable ultrasonic radiation force and radiation moment field, thereby realize the motor system of the contactless microscale rotation of the non-ball symmetric rotor being trapped in this radiant force and moment field.
Background technology
Along with scientific and technical fast development, the demand that the mankind explore microworld is day by day strong.In recent years, microscopic fields had little by little become the focus of scientific research.MEMS (micro electro mechanical system), as the important tool of studying better microworld, develops into the study hotspot in forward position gradually.For Mechatronic Systems, drive source is to realize the requisite parts of motion.
Take a broad view of the present Research of current MEMS (micro electro mechanical system), the drive force source adopting is the Magnetostrictive Properties based on material, piezoelectric effect characteristic and Characteristics of Thermal deformation mainly.As < < ultra-fine bidirectional driving type linear micromotor > > (number of patent application is 200310108399), the method for making > > of a < < electrothermal drive microstructure (number of patent application is 201010149262) and < < air cooling temperature control type ultra-magnetostriction microdisplacement driver > > (number of patent application is 200720110894) etc. are the mini drives based on physical characteristics of materials research and development.The multi-mode micro-driving force source > > (number of patent application 200910099520.1) of < < based on phased-array technique proposed a kind of drive force source based on ultrasonic radiation force.But the motion that described mini drive is realized is linear movement, cannot directly realize and rotatablely moving.
Summary of the invention
The object of the present invention is to provide a set of contactless microscale rotation motor system based on ultrasonic radiation moment.
Technical matters of the present invention is solved by following technical scheme:
Contactless microscale rotation motor based on ultrasonic radiation moment, by the bus-structured industrial computer of PXI, the program control adjustable ultrasonic signal of multi-channel parameter blocks, multi-channel high frequency linear power amplifier, hyperchannel load automatic adapter and ultrasonic transducer group form, by the program control adjustable ultrasonic signal of PXI bus slot and multi-channel parameter, there is card and be connected in industrial computer, there is card and be connected with multi-channel high frequency linear power amplifier in the program control adjustable ultrasonic signal of multi-channel parameter, multi-channel high frequency linear power amplifier is connected with hyperchannel load automatic adapter, hyperchannel load automatic adapter is connected with ultrasonic transducer group, the program control adjustable ultrasonic signal of multi-channel parameter blocks, and according to the demand of spinfunction, circulation produces the sine voltage signal that many group amplitudes change successively.This sine voltage signal, after multi-channel high frequency linear power amplifier, is enlarged into high-power sinusoidal drive voltage signal, then inputs ultrasonic transducer group after hyperchannel load automatic adapter is done load matched.Ultrasonic transducer group produces a radiant force without radius continuous rotation and moment field, and rotation is also followed in the radiation moment field of its generation, and drives non-ball symmetric rotor to do synchronous rotary motion.
Beneficial effect of the present invention is mainly manifested in:
1. the present invention is based on ultrasonic radiation moment, utilize rotation radiant force and the moment field of the synthetic expection of the synthetic principle of sound wave, drive non-ball symmetric rotor rotation.Potential well yardstick and the consistent wavelength of ultrasonic radiation force and moment field, therefore its rotor size of capturing is also micron order.
2. the present invention proposes the non-contact rotary motor under a kind of microscale, broken through the defect that the micro motor based on material behavior in the past can only be realized linear movement.
3. the rotation of non-ball symmetric rotor is moving without radius around its geometric center.
4. native system has good extendability, is easy to upgrading.
5. native system possesses interaction capabilities, and user can pass through upper computer software interactive interface governor motor rotational speed and load capacity easily.
Accompanying drawing explanation
Fig. 1 is a kind of overall construction drawing of the contactless microscale rotation motor system based on ultrasonic radiation moment.
Wherein, 1 is the bus-structured industrial computer of PXI, and 2 is that the program control adjustable ultrasonic signal of six channel parameters blocks, and 3 is six passage high-frequency linear power amplifiers, and 4 is six passage load automatic adapters, and 5-10 is ultrasonic transducer group.
Fig. 2 is the ultimate principle of the contactless microscale rotation motor system based on ultrasonic radiation moment.
Fig. 3 is the structural drawing that card occurs the program control adjustable ultrasonic signal of multi-channel parameter.
Wherein, 11 is control module, and 12 is storer, and 13 is communication control unit, and 14 is trigger control unit, and 15 is DDS unit, and 16 is D/A conversion unit.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
As shown in Figure 1, the contactless microscale rotation motor system based on ultrasonic radiation moment of the present invention comprises that card 2, six passage high-frequency linear power amplifiers 3, six passage load automatic adapters 4 and ultrasonic transducer group 5,6,7,8,9,10 occur for the bus-structured industrial computer 1 of PXI, the program control adjustable ultrasonic signal of six channel parameters.There is card and be installed in PXI cabinet in the program control adjustable ultrasonic signal of multi-channel parameter, according to the demand of spinfunction, circulation produces the sine voltage signal that many group amplitudes change successively.This sine voltage signal, after multi-channel high frequency linear power amplifier, is enlarged into high-power sinusoidal drive voltage signal, then inputs each transducer after hyperchannel load automatic adapter is done load matched.Ultrasonic transducer group produces a radiant force without radius continuous rotation and moment field, and rotation is also followed in the radiation moment field of its generation, and drives non-ball symmetric rotor to do synchronous rotary motion.
Industrial computer based on PXI bus: industrial computer is as the industrial computer of system, and operation upper computer software, is responsible for man-machine interaction.User can pass through upper computer software interactive interface, and rotational speed and the loading moment size of contactless microscale rotation motor is set.Software calculates optimum driving voltage amplitude and pattern switching frequency, and by PXI bus by phase at the sound parameter be sent to the program control adjustable ultrasonic signal of multi-channel parameter and block.
The program control adjustable ultrasonic signal of multi-channel parameter blocks: the program control adjustable ultrasonic signal of multi-channel parameter card occurs based on DDS technology, can produce all program control adjustable low-yield initial sine voltage signals of the parameters such as frequency, amplitude and phase place.This generation card comprises three parts, i.e. control module, DDS unit and D/A conversion unit.Wherein, control module and DDS unit are integrated on same a slice fpga chip.Control module comprises communication control unit and trigger control unit.The soft core of the PCI of communication control unit based on ALTERA company, bears the communication task with host computer, the storage of control sound parameter command and reading, and sound parameter command is converted to the receivable parameter in DDS unit.Trigger control unit, after DDS cell location parameter is completed, triggers the discrete sine voltage signal that DDS unit produces multichannel normalization amplitude simultaneously.DDS unit comprises 6 DDS modules, can export separately 6 tunnel discrete sine voltage signals and 6 tunnel amplitude control signals.D/A conversion unit comprises D/A change-over circuit and integrated operational amplifier circuit.D/A change-over circuit converts the discrete sine voltage signal of DDS unit output to simulating signal, and amplitude control signal determines the amplitude of analog voltage signal.Integrated operational amplifier circuit offset of sinusoidal analog voltage signal is done one-level amplification and level and smooth.
Multi-channel high frequency linear power amplifier: multi-channel high frequency linear power amplifier is mainly comprised of PA19 operation amplifier chip and peripheral circuit thereof, the secondary of realizing high frequency sine voltage signal amplifies.
Hyperchannel load automatic adapter: hyperchannel load automatic adapter is responsible for the impedance matching between driving circuit and ultrasonic transducer, makes transducer be operated in optimum condition, effectively improves electro-acoustic conversion efficiency.
Ultrasonic transducer group: ultrasonic transducer group is comprised of 6 planar piston transducers, is circumferentially symmetrical, and the acoustic axis direction of every two transducers becomes 60 ° of angles, and the acoustic axis of all transducers is intersected in central point.
The present invention adopts the synthetic principle of hyperchannel sound wave, fix the hyperacoustic phase place in each road, according to vector control technology, adjust the amplitude of each road ultrasonic signal, realize the Space Rotating of ultrasonic radiation force and moment field, drive the rotor being captured in radiant force and moment field to follow rotation simultaneously.As shown in Figure 1,6 ultrasonic transducers become equal angles symmetrical, and the acoustic axis angle of every two transducers is 60 °, and all acoustic beams are intersected in central point.Different according to the drive voltage signal initial phase applying, 6 transducers are divided into two groups.The initial phase of first group of drive voltage signal (putting on transducer 5,7,9) is fixed as 0 °, and the initial phase of second group of drive voltage signal (putting on transducer 6,8,10) is fixed as 60 °.Different according to the amplitude that applies drive voltage signal, 6 transducers are divided into 3 to (5 and 8,6 and 9,7 and 10).It is identical that the drive voltage signal amplitude that every pair of two transducer apply keeps, but each is to being not quite similar between transducer.Accompanying drawing 2 has been described when each and transducer has been subjected to after the voltage mode (amplitude normalization) of different amplitudes, the acoustic pressure changes in distribution of theoretical sound field and the corresponding attitude of rotor.According to Fig. 2 a to 2l order, the voltage mode that the three pairs of transducers apply is (0.6,1,1), (0.8,0.8,1), (1,0.6,1), (1,0.8,0.8), (1,1,0.6), (0.8,1,0.8), (0.6,1,1), (0.8,0.8,1), (1,0.6,1), (1,0.8,0.8), (1,1,0.6) and (0.8,1,0.8).Wherein, (0.6,1,1), (1,0.6,1) and (1,1,0.6) is three kinds of basic models, three vector bases of corresponding vector control technology, and all the other patterns can be considered the stack of three kinds of bases.Above-mentioned voltage mode is loaded on to ultrasonic transducer group according to both definite sequences, and non-ball symmetric rotor has realized without radius spin and having circled.In addition, rotary speed of rotator is decided by switching frequency between the size of transducer on-load voltage amplitude and pattern.When pattern switching frequency meets certain condition, rotary speed of rotator tends to be steady and remains larger driving moment
Known according to Fig. 3, there is card 2 and be comprised of control module 11, DDS unit 15 and D/A conversion unit 16 in the program control adjustable ultrasonic signal of multi-channel parameter.Control module 11 comprises communication control unit 13, trigger control unit 14 and storer 12.Communication control unit 13 accepts by PXI bus interface 12 groups of sound parameter commands that industrial computer 1 sends, and is stored in storer 12.Communication control unit 13 circulation is read Dan Zusheng parameter from storer 12 successively, and is configured to 6 DDS modules in DDS unit 15, and after to be configured completing, notification triggers control module 14 is synchronous triggers all DDS modules.DDS unit 15 comprises 6 DDS modules, can produce independently low-yield discrete sine signal of 6 tunnels simultaneously.D/A conversion unit 16 comprises D/A converter and one-level discharge circuit, and the discrete sine signal of DDS unit 15 outputs is done to amplify and smoothing processing.
There is card 2 with the program control adjustable ultrasonic signal of multi-channel parameter respectively and be connected with hyperchannel load automatic adapter 4 in multi-channel high frequency linear power amplifier 3, its effect is the linear drive voltage signal of amplifying of secondary.
Hyperchannel load automatic adapter 4 is connected with transducer group 5-10 with multi-channel high frequency linear power amplifier 3 respectively, and its effect is the impedance between coupling transducer and driving circuit.
Ultrasonic transducer group 5-10 is connected with hyperchannel load automatic adapter 4, and its effect is to produce ultrasonic signal, synthetic ultrasonic radiation force and radiation moment field.
Claims (6)
1. the contactless microscale rotation motor based on ultrasonic radiation moment, by the bus-structured industrial computer of PXI, the program control adjustable ultrasonic signal of multi-channel parameter blocks, multi-channel high frequency linear power amplifier, hyperchannel load automatic adapter and ultrasonic transducer group form, it is characterized in that: industrial computer by the program control adjustable ultrasonic signal of PXI bus slot and multi-channel parameter, card occurs and is connected, there is card and be connected with multi-channel high frequency linear power amplifier in the program control adjustable ultrasonic signal of multi-channel parameter, multi-channel high frequency linear power amplifier is connected with hyperchannel load automatic adapter, hyperchannel load automatic adapter is connected with ultrasonic transducer group, the program control adjustable ultrasonic signal of multi-channel parameter blocks, and according to the demand of spinfunction, circulation produces the sine voltage signal that many group amplitudes change successively, this sine voltage signal, after multi-channel high frequency linear power amplifier, is enlarged into high-power sinusoidal drive voltage signal, then inputs ultrasonic transducer group after hyperchannel load automatic adapter is done load matched, ultrasonic transducer group produces a radiant force without radius continuous rotation and moment field, and rotation is also followed in the radiation moment field of its generation, and drives non-ball symmetric rotor to do synchronous rotary motion.
2. the contactless microscale rotation motor based on ultrasonic radiation moment according to claim 1, is characterized in that: the program control adjustable ultrasonic signal of described multi-channel parameter card occurs and control module, DDS unit and D/A conversion unit, consists of; Wherein, control module comprises storer, communication control unit and trigger control unit; Control module is connected with DDS unit by address, data bus and control bus, and DDS unit is connected with D/A conversion unit.
3. the contactless microscale rotation motor based on ultrasonic radiation moment according to claim 1, it is characterized in that: described ultrasonic transducer group is comprised of six planar piston transducers, be circumferentially symmetrical, the acoustic axis direction of every two transducers becomes 60 ° of angles, and the acoustic axis of all transducers is intersected in central point.
4. the contactless microscale rotation motor based on ultrasonic radiation moment according to claim 2, it is characterized in that: the soft core of the PCI of described communication control unit based on ALTERA company, bear the communication task with host computer, the storage of control sound parameter command and reading, and sound parameter command is converted to the receivable parameter in DDS unit; Trigger control unit, after DDS cell location parameter is completed, triggers the discrete sine voltage signal that DDS unit produces multichannel normalization amplitude simultaneously.
5. the contactless microscale rotation motor based on ultrasonic radiation moment according to claim 3, it is characterized in that: different according to the drive voltage signal initial phase applying, the transducer at interval forms one group, thereby six transducers are divided into two groups, wherein the initial phase of first group of drive voltage signal is fixed as 0 °, and the initial phase of second group of drive voltage signal is fixed as 60 °.
6. the contactless microscale rotation motor based on ultrasonic radiation moment according to claim 3, it is characterized in that: different according to the amplitude that applies drive voltage signal, over against transducer form a pair of, thereby six transducers are divided into three pairs, it is identical that the drive voltage signal amplitude that every pair of two transducer apply keeps, but each is to being not quite similar between transducer.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110002397A (en) * | 2019-04-04 | 2019-07-12 | 南京航空航天大学 | A kind of preparation method of complex configuration nano-motor |
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| US20090114019A1 (en) * | 2007-06-07 | 2009-05-07 | Mostafa Fatemi | Method for imaging surface roughness using acoustic emissions induced by ultrasound |
| CN101576536A (en) * | 2009-06-18 | 2009-11-11 | 浙江大学 | Multi-mode micro-driving force source based on phased array technology |
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| CN110002397A (en) * | 2019-04-04 | 2019-07-12 | 南京航空航天大学 | A kind of preparation method of complex configuration nano-motor |
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Application publication date: 20140423 |