CN1949105A - Closed loop controlling system based on amplitude-frequency feature of resonance type sensor - Google Patents
Closed loop controlling system based on amplitude-frequency feature of resonance type sensor Download PDFInfo
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- CN1949105A CN1949105A CN 200610114362 CN200610114362A CN1949105A CN 1949105 A CN1949105 A CN 1949105A CN 200610114362 CN200610114362 CN 200610114362 CN 200610114362 A CN200610114362 A CN 200610114362A CN 1949105 A CN1949105 A CN 1949105A
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Abstract
The invention relates to resonant transducer closed loop control system based on the amplitude-frequency characteristic. The system includes amplitude detector, controller, and drive signal generator. The controller controls the drive signal generator to generate drive signal with single frequency. The amplitude detector detects the output signal amplitude of the sensitive structure. When the frequency of the drive signal increases, it continues if the output single amplitude increases; while it is opposite if it is not. When the frequency of the drive signal reduces, it continues if the output signal amplitude increases; while it is opposite if it is not. This can further make the output single amplitude reach the maximum. The corresponding drive signal frequency is the resonance frequency for the resonator. Thus the invention can realize transducer closed loop.
Description
Technical field
The present invention relates to a kind of closed-loop control system of resonant transducer, particularly a kind of resonant transducer is based on the closed-loop control system of amplitude versus frequency characte.
Background technology
Resonant transducer is under measured effect, the natural frequency of the resonator of its sensitive structure changes, there are one-to-one relationship in the resonance frequency of sensitive structure and the natural frequency of resonator, can record the natural frequency of resonator by the resonance frequency of measuring sensitive structure, thereby record measured value.Performance index such as the repeatability of resonant transducer, resolving power and stability are outstanding, are suitable for the measurement as multiple parameters such as pressure, acceleration, power, density.
The sensitive structure needs of resonant transducer and closed-loop system are in conjunction with working, common closed-loop system is simultaneously based on the amplitude versus frequency characte of the sensitive structure of resonant transducer and phase-frequency characteristic, according to the phase-frequency characteristic of the sensitive structure of resonant transducer, the closed loop of sensor need satisfy a phase condition; According to the amplitude versus frequency characte of the sensitive structure of resonant transducer, the closed loop of sensor need satisfy an amplitude conditions.Common closed-loop control system comprises amplitude controlling unit and phase shift link, amplitude controller is used for regulating the gain of whole closed loop, to satisfy the amplitude conditions of resonant transducer self-excitation closed loop, the phase shift link is used for regulating the phase shift of whole closed loop, to satisfy the phase condition of resonant transducer self-excitation closed loop.
Because resonant transducer is operated in the certain frequency scope, the phase shift link can not guarantee that the characteristic in this frequency range is all consistent, and the influence that the characteristic of phase shift link is subjected to factors such as temperature also can produce drift.The phase drift that the phase shift link produces will make the resonance frequency of whole closed-loop system produce drift by the phase in-migration compensation of the sensitive structure of resonant transducer, the natural frequency that can not follow the tracks of resonant transducer sensitive structure accurately, thus produce measuring error.And the phase shift link is comparatively complicated on circuit is realized, the phase drift that compensation phase shift link produces in circuit also compares difficulty.Common amplitude controller adopts automatic gain (AGC) system that regulates to realize, realizes that circuit is also comparatively complicated.
The closed-loop control of resonant transducer can realize that also phaselocked loop is made up of phase detector, loop filter and voltage controlled oscillator by phase-locked loop circuit, and it realizes also more complicated of circuit.
Summary of the invention
Technology of the present invention is dealt with problems and is: overcome the deficiencies in the prior art, the closed loop of a kind of resonant transducer based on amplitude versus frequency characte is provided, simplified closed loop circuit, also avoided the measuring error that is produced by the phase shift link simultaneously.
Technical solution of the present invention: resonant transducer comprises range detector, controller and excitation signal generator based on the closed-loop control system of amplitude versus frequency characte, controller control excitation signal generator produces the pumping signal of single-frequency, the excitation sensitive structure, range detector detects the amplitude of the pick-up element output signal of sensitive structure.When the increase of exciting signal frequency, if the amplitude of pick-up element output signal increases, then continue to increase the frequency of pumping signal, otherwise reduce the frequency of pumping signal, during the reducing of exciting signal frequency, the element amplitude output signal increases if shake, then continue to reduce the frequency of pumping signal, otherwise increase the frequency of pumping signal, and then make the amplitude of pick-up element output signal reach maximal value, the frequency of corresponding pumping signal promptly is the resonance frequency of the resonator of resonant transducer sensitive structure, thereby realizes the closed loop of sensor.
Principle of the present invention: the present invention has adopted the amplitude versus frequency characte of resonant transducer sensitive structure to realize the closed loop of sensor.As shown in Figure 2, the frequency that the peak value of the amplitude versus frequency characte of resonant transducer sensitive structure (maximal value) is corresponding is its resonance frequency, by changing the frequency of pumping signal, measure the amplitude of pick-up element output signal of the resonant transducer sensitive structure of each Frequency point correspondence, the frequency of peak value correspondence that obtains the amplitude versus frequency characte of resonant transducer sensitive structure is its resonance frequency, thereby records the resonance frequency of resonant transducer sensitive structure.Exciting signal frequency is regulated according to the variation tendency of the amplitude of pick-up element output signal, realized closed-loop system to the resonance frequency of resonant transducer sensitive structure from motion tracking, thereby realized closed loop based on the resonant transducer sensitive structure amplitude versus frequency characte.
The present invention's advantage compared with prior art: because the present invention has adopted the amplitude versus frequency characte of resonant transducer sensitive structure to realize the closed loop of sensor, avoided the application of amplitude controller, phase shift link or phase-locked loop circuit, simplify the closed loop circuit of sensor, also avoided the measuring error that is produced by the phase shift link simultaneously.
Description of drawings
Fig. 1 is the structural representation of resonant transducer of the present invention based on the closed loop of amplitude versus frequency characte;
Fig. 2 is the theoretic frequency performance diagram of resonator of the present invention, and wherein Fig. 2 a is amplitude-versus-frequency curve figure, and Fig. 2 b is the phase-frequency characteristic curve map;
Fig. 3 is the process flow diagram of resonant transducer of the present invention based on the closed-loop control system controller of amplitude versus frequency characte.
Embodiment
As shown in Figure 1, resonant transducer of the present invention comprises range detector 5, controller 4 and excitation signal generator 3 based on the closed-loop control system 2 of the closed loop of amplitude versus frequency characte, controller 4 control excitation signal generators 3 produce the pumping signal of single-frequency, excitation sensitive structure 1, range detector 5 detects the amplitude of pick-up element 6 output signals of sensitive structure 1.
As shown in Figure 3, controller 4 control excitation signal generators 3 produce pumping signal, when the increase of exciting signal frequency, if the amplitude of pick-up element 6 output signals increases, then continue to increase the frequency of pumping signal, otherwise reduce the frequency of pumping signal, during the reducing of exciting signal frequency, element 6 amplitude output signals increase if shake, then continue to reduce the frequency of pumping signal, otherwise increase the frequency of pumping signal, and then make the amplitude of pick-up element 6 output signals reach maximal value, the frequency of corresponding pumping signal promptly is the resonance frequency of the resonator 7 of resonant transducer sensitive structure 1.
Claims (3)
1, resonant transducer is based on the closed-loop control system of amplitude versus frequency characte, it is characterized in that: comprise range detector (5), controller (4) and excitation signal generator (3), controller (4) control excitation signal generator (3) produces the pumping signal of single-frequency, excitation sensitive structure (1), range detector (5) detects the amplitude of pick-up element (6) output signal of sensitive structure (1), when the increase of exciting signal frequency, if the amplitude of pick-up element (6) output signal increases, then continue to increase the frequency of pumping signal, otherwise reduce the frequency of pumping signal; During the reducing of exciting signal frequency, element (6) amplitude output signal increases if shake, then continue to reduce the frequency of pumping signal, otherwise increase the frequency of pumping signal, make the amplitude of pick-up element (6) output signal reach maximal value, the frequency of corresponding pumping signal promptly is the resonance frequency of the resonator (7) of resonant transducer sensitive structure (1).
2, resonant transducer according to claim 1 is characterized in that based on the closed loop of amplitude versus frequency characte: described excitation signal generator (3) adopts the DDS chip to realize, or single-chip microcomputer or dsp processor.
3, resonant transducer according to claim 1 is characterized in that based on the closed loop of amplitude versus frequency characte: described range detector 5 is realized by mimic channel, or is realized by mimic channel, analog-digital converter and processor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610114362 CN100527023C (en) | 2006-11-08 | 2006-11-08 | Closed loop controlling system based on amplitude-frequency feature of resonance type sensor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610114362 CN100527023C (en) | 2006-11-08 | 2006-11-08 | Closed loop controlling system based on amplitude-frequency feature of resonance type sensor |
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| Publication Number | Publication Date |
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| CN1949105A true CN1949105A (en) | 2007-04-18 |
| CN100527023C CN100527023C (en) | 2009-08-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200610114362 Expired - Fee Related CN100527023C (en) | 2006-11-08 | 2006-11-08 | Closed loop controlling system based on amplitude-frequency feature of resonance type sensor |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102136830A (en) * | 2010-10-21 | 2011-07-27 | 北京大学 | Frequency-raising drive control method for micromechanical resonant device |
| CN102224467A (en) * | 2008-11-26 | 2011-10-19 | 阿莱戈微系统公司 | Closed-loop motor driver compensation |
| CN106768290A (en) * | 2015-11-24 | 2017-05-31 | 中国航空工业第六八研究所 | One kind finds dithering-wheel resonant frequency method |
| CN108801534A (en) * | 2017-05-03 | 2018-11-13 | 珠海全志科技股份有限公司 | Based on the sensitive resonant mode gas pressure sensor of damping |
| CN109341844A (en) * | 2018-12-06 | 2019-02-15 | 应达利电子股份有限公司 | A kind of jar tester and its detection method |
| CN110530496A (en) * | 2018-05-25 | 2019-12-03 | 南京理工大学 | A kind of Fibre Optical Sensor demodulation method modulated based on digital filtering and binary pulses |
| CN113917838A (en) * | 2021-09-29 | 2022-01-11 | 华中科技大学 | Resonant sensor based on sideband excitation |
| CN115962768A (en) * | 2023-03-16 | 2023-04-14 | 中国人民解放军国防科技大学 | Harmonic oscillator closed-loop excitation phase shift control method, device and equipment |
-
2006
- 2006-11-08 CN CN 200610114362 patent/CN100527023C/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102224467A (en) * | 2008-11-26 | 2011-10-19 | 阿莱戈微系统公司 | Closed-loop motor driver compensation |
| CN102224467B (en) * | 2008-11-26 | 2014-08-27 | 阿莱戈微系统有限责任公司 | Closed-loop motor driver compensation |
| CN102136830A (en) * | 2010-10-21 | 2011-07-27 | 北京大学 | Frequency-raising drive control method for micromechanical resonant device |
| CN102136830B (en) * | 2010-10-21 | 2013-08-21 | 北京大学 | Frequency-up drive control method for micromechanical resonant device |
| CN106768290A (en) * | 2015-11-24 | 2017-05-31 | 中国航空工业第六八研究所 | One kind finds dithering-wheel resonant frequency method |
| CN108801534A (en) * | 2017-05-03 | 2018-11-13 | 珠海全志科技股份有限公司 | Based on the sensitive resonant mode gas pressure sensor of damping |
| CN110530496A (en) * | 2018-05-25 | 2019-12-03 | 南京理工大学 | A kind of Fibre Optical Sensor demodulation method modulated based on digital filtering and binary pulses |
| CN109341844A (en) * | 2018-12-06 | 2019-02-15 | 应达利电子股份有限公司 | A kind of jar tester and its detection method |
| CN109341844B (en) * | 2018-12-06 | 2020-12-25 | 深圳市深汕特别合作区应达利电子科技有限公司 | Vibration detector and detection method thereof |
| CN113917838A (en) * | 2021-09-29 | 2022-01-11 | 华中科技大学 | Resonant sensor based on sideband excitation |
| CN115962768A (en) * | 2023-03-16 | 2023-04-14 | 中国人民解放军国防科技大学 | Harmonic oscillator closed-loop excitation phase shift control method, device and equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100527023C (en) | 2009-08-12 |
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Granted publication date: 20090812 Termination date: 20121108 |