CN108787409A - A kind of intelligently sweeping frequency method of ultrasonic signal generator - Google Patents
A kind of intelligently sweeping frequency method of ultrasonic signal generator Download PDFInfo
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- CN108787409A CN108787409A CN201810481459.6A CN201810481459A CN108787409A CN 108787409 A CN108787409 A CN 108787409A CN 201810481459 A CN201810481459 A CN 201810481459A CN 108787409 A CN108787409 A CN 108787409A
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- 238000010408 sweeping Methods 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000001514 detection method Methods 0.000 claims description 3
- 238000003860 storage Methods 0.000 claims description 3
- 230000001174 ascending effect Effects 0.000 abstract description 5
- 230000002463 transducing effect Effects 0.000 description 2
- 238000002604 ultrasonography Methods 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B3/00—Methods or apparatus specially adapted for transmitting mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
- B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
- B06B1/06—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction
Abstract
The present invention relates to a kind of intelligently sweeping frequency method of ultrasonic signal generator, the ultrasonic signal generator for being connected with N number of ultrasonic transducer, N is the natural number more than or equal to 2, it is characterised in that：Include the following steps.Step 1, parameter presets stage, following parameter is mainly set：Frequency sweep initial frequency fstart, terminate frequency fstop, sweep interval fstep, sweep times N in advanceinit, relative frequency difference RFD, relative frequency step pitch RFS and relative frequency step pitch multiplying power k；Step 2, initialization pre-scan phase, from fstartTo fstopCarry out NinitSublinear frequency scans, while detecting the eigentone for the N number of ultrasonic transducer being attached thereto, and the eigentone of N number of ultrasonic transducer is carried out sort ascending；Step 3, intelligently sweeping frequency stage, according to adjacent intrinsic frequency fiWith fi+1Between relative frequency difference be segmented the frequency steps such as not away from linear frequency sweep.Compared with the prior art, the advantages of the present invention are as follows：Can frequency matching driving be realized to multiple energy converters successively, solve the problems, such as ultrasonic signal generator while driving the frequency mismatch of multiple energy converters.
Description
Technical field
The present invention relates to a kind of intelligently sweeping frequency methods of ultrasonic signal generator.
Background technology
Existing ultrasonic signal generator can substantially be divided into fixed frequency driving ultrasonic signal generator and
The ultrasonic signal generator two major classes of intelligent frequency tracking.The ultrasonic signal generator of fixed frequency driving, according to precognition
Transducer characteristics parameter setting ultrasonic signal generator relevant parameter, so that it is generated the drive signal of a certain fixed frequency
To drive energy converter to export larger ultrasonic power or export the ultrasonic wave of fixed frequency.The ultrasonic signal of intelligent frequency tracking
Generator can detect the instantaneous operating conditions parameter of energy converter, be adaptively adjusted the frequency of drive signal to track transducing
The variation of device intrinsic frequency, to realize, driving energy converter exports maximum ultrasonic power always.
Existing ultrasonic transducer mostly use greatly piezoelectric ceramics making, due to material technicality and processing technology not
Crash consistency, even its eigentone of the ultrasonic transducer of same batch production also has obvious difference
It is different, and its eigentone can also drift about with the variation of operating mode in actual use.For fixed frequency
The ultrasonic signal generator of rate driving, after its running parameter is provided with, driving frequency just immobilizes, Bu Nengling
The vibration frequency living for adapting to each energy converter.For the ultrasonic signal generator of intelligent frequency tracking, although its output driving
The frequency of signal can intelligently track the variation of ultrasonic transducer intrinsic frequency and change, but its intelligent-tracking scheme be by
The characteristic index of an energy converter is tracked come what is be designed, cannot meet while tracking wanting for the multiple ultrasonic transducers of driving
It asks.
Invention content
The technical problem to be solved by the present invention is to provide a kind of to drive multiple ultrasounds simultaneously for the above-mentioned prior art
The ultrasonic signal generator intelligently sweeping frequency method of wave transducer.
Technical solution is used by the present invention solves above-mentioned technical problem：A kind of intelligence of ultrasonic signal generator is swept
Frequency method, the ultrasonic signal generator for being connected with N number of ultrasonic transducer, N is the natural number more than or equal to 2, special
Sign is to include the following steps：
Step 1, parameter presets stage, following parameter is set：Frequency sweep initial frequency fstart, terminate frequency fstop, frequency sweep
It is spaced fstep, sweep times N in advanceinit, relative frequency difference RFD, relative frequency step pitch RFS and relative frequency step pitch multiplying power k；
Step 2, initialization pre-scan phase, ultrasonic signal generator is while carrying out initialization prescan, detection
The eigentone for the N number of ultrasonic transducer being attached thereto, and the eigentone of N number of ultrasonic transducer is carried out
Sort ascending is denoted as f respectively1、f2、f3、…、fN-1、fN, initialize pre-scan phase and include the following steps：
Step (2-1) carries out linear frequency prescan：The driving frequency of ultrasonic signal generator output is originated by frequency sweep
Frequency fstartStart, interval successively increases sweep interval f at every fixed timestep, until ultrasonic signal generator exports
Driving frequency increase to and terminate frequency fstop；
Step (2-2) repeats step step (2-1) NinitIt is secondary, times N is swept in advanceinitFor the natural number more than or equal to 1；
Step 3, intelligently sweeping frequency stage, by initial frequency fstartIt is assigned a value of (1-RFD) × f1, frequency f will be terminatedstopAssignment
For (1+RFD) × fN, sweep interval fstepIt is constant to remain initial value, wherein RFD is preset relative frequency difference；If ultrasonic wave
The driving frequency that signal generator currently exports is fcur, fcurInitial value be equal to initial frequency fstart=(1-RFD) × f1；Intelligence
It can specifically comprise the following steps in the frequency sweep stage：
Step (3-1) judges fcurWhether f is more thanstop：If so, this intelligently sweeping frequency terminates；If not, entering step (3-
2)；
Step (3-2) judgesWhether preset relative frequency difference RFD is more than：If so, entering step (3-3)；
If not, enter step (3-6), wherein i=1,2,3 ..., N, the initial value of i is 1；
Step (3-3) judges fcurWhether f is more thani+1：If so, the value of i is added 1, it is then back to step (3-3)；Such as
It is no, it enters step (3-4)；
Step (3-4) judgesWhether preset relative frequency difference RFD is less than：If so, entering step (3-5)；
If not, by sweep interval fstepIt is assigned a value of k*RFS*fi, wherein RFS is preset relative frequency step pitch, relative frequency step pitch multiplying power
K is the preset constant not less than 1, subsequently into step (3-6)；
The value of i is added 1 by step (3-5), by sweep interval fstepIt is assigned a value of RFS*fi, wherein RFS is preset opposite
Frequency steps are away from subsequently into step (3-6)；
Step (3-6), the driving frequency f for currently exporting ultrasonic signal generatorcurIt is assigned a value of fcurIn addition between frequency sweep
Every fstep, it is then back to step (3-1).
As an improvement, the intelligently sweeping frequency stage further includes step (3-7), repeats step (3-1) to step (3-6) X times,
The value of X is the natural number more than or equal to 1.
It improves again, ultrasonic signal generator detects the N number of ultrasonic wave being attached thereto again while executing step 3
The eigentone of energy converter, and the eigentone of N number of ultrasonic transducer is updated, it will be updated N number of
Eigentone carries out sort ascending again, is denoted as f respectively1、f2、f3、…、fN-1、fN, step 3 is then executed repeatedly；By right
The real-time update of energy converter eigentone makes each ultrasonic waves with can taking turns the real-time dynamic self-adapting of mode of sequence successively
Energy device enters frequency matching resonance state, and to export the ultrasonic power of bigger, the ultrasonic wave for improving energy converter group exports total work
Rate.
Need the parameter being arranged can be from the storage unit of ultrasonic signal generator in the parameter presets stage
It directly reads, can also be freely arranged by user.
Preferably, the recommendation value range of preset relative frequency difference RFD is 0.2%~1.5%；Preset opposite frequency
The recommendation value range of rate step pitch RFS is 0.01%~0.2%；The recommendation value range of relative frequency step pitch multiplying power k be 1.2~
5。
As a kind of simplification of above-described embodiment, sweep interval f can also be used during frequency sweepstepOnly take initial value and
K times of initial value.
Compared with the prior art, the advantages of the present invention are as follows：The present invention is in the intelligently sweeping frequency stage according to N number of ultrasonic wave transducer
The difference of the two adjacent eigentones of device carries out nonlinear scanning, to realize frequency matching to multiple energy converters successively
Driving, solves the problems, such as ultrasonic signal generator while driving the frequency mismatch of multiple energy converters.
Description of the drawings
Fig. 1 is the flow chart in intelligently sweeping frequency stage in the embodiment of the present invention.
Fig. 2 is the drive frequency variations signal that intelligently sweeping frequency stage ultrasound signal generator exports in the embodiment of the present invention
Figure.
Specific implementation mode
Below in conjunction with attached drawing embodiment, present invention is further described in detail.
The present invention provides a kind of intelligently sweeping frequency methods of ultrasonic signal generator, for being connected with N number of ultrasonic waves
The ultrasonic signal generator of energy device, N are the natural number more than or equal to 2 comprising following steps：
Step 1, parameter presets stage, following parameter is set：Frequency sweep initial frequency fstart, terminate frequency fstop, frequency sweep
It is spaced fstep, sweep times N in advanceinit, relative frequency difference RFD, relative frequency step pitch RFS and relative frequency step pitch multiplying power k；Above-mentioned ginseng
Number can directly be directly read from the storage unit of ultrasonic signal generator, can also be freely arranged by user；
Step 2, initialization pre-scan phase, ultrasonic signal generator is while carrying out initialization prescan, detection
The eigentone for the N number of ultrasonic transducer being attached thereto, and the eigentone of N number of ultrasonic transducer is carried out
Sort ascending is denoted as f respectively1、f2、f3、…、fN-1、fN, initialize pre-scan phase and include the following steps：
Step (2-1) carries out linear frequency prescan：The driving frequency of ultrasonic signal generator output is originated by frequency sweep
Frequency fstartStart, interval successively increases sweep interval f at every fixed timestep, until ultrasonic signal generator exports
Driving frequency increase to and terminate frequency fstop；
Step (2-2) repeats step step (2-1) NinitIt is secondary, times N is swept in advanceinitFor the natural number more than or equal to 1；
Step 3, intelligently sweeping frequency stage, by initial frequency fstartIt is assigned a value of (1-RFD) × f1, frequency f will be terminatedstopAssignment
For (1+RFD) × fN, sweep interval fstepIt is constant to remain initial value, wherein RFD is preset relative frequency difference, relative frequency
The recommendation value range of poor RFD is 0.2%~1.5%, preferably 0.5%；If the drive that ultrasonic signal generator currently exports
Dynamic frequency is fcur, fcurInitial value be equal to initial frequency fstart=(1-RFD) × f1；The intelligently sweeping frequency stage specifically includes as follows
Step：
Step (3-1) judges fcurWhether f is more thanstop：If so, this intelligently sweeping frequency terminates；If not, entering step (3-
2)；
Step (3-2) judgesWhether preset relative frequency difference RFD is more than：If so, entering step (3-3)；
If not, enter step (3-6), wherein i=1,2,3 ..., N, the initial value of i is 1；
Step (3-3) judges fcurWhether f is more thani+1：If so, the value of i is added 1, it is then back to step (3-3)；Such as
It is no, it enters step (3-4)；
Step (3-4) judgesWhether preset relative frequency difference RFD is less than：If so, entering step (3-5)；
If not, by sweep interval fstepIt is assigned a value of k*RFS*fi, wherein RFS is preset relative frequency step pitch, relative frequency step pitch multiplying power
K is the preset constant not less than 1, and the recommendation value range of preset relative frequency step pitch RFS is 0.01%~0.2%, preferably
It is 0.05%；The recommendation value range of relative frequency step pitch multiplying power k is 1.2~5, preferably 2；Subsequently into step (3-6)；
The value of i is added 1 by step (3-5), by sweep interval fstepIt is assigned a value of RFS*fi, wherein RFS is preset opposite
Frequency steps are away from subsequently into step (3-6)；
Step (3-6), the driving frequency f for currently exporting ultrasonic signal generatorcurIt is assigned a value of fcurIn addition between frequency sweep
Every fstep, it is then back to step (3-1).
In order to keep the stability in intelligently sweeping frequency stage, the intelligently sweeping frequency stage to further include step (3-7), repeat step
(3-1) to step (3-6) X times, the value of X is the natural number more than or equal to 1.
Attached drawing 2 is the driving of ultrasonic signal generator output when carrying out intelligently sweeping frequency using method provided by the invention
Frequency variation curve figure.
Ultrasonic signal generator detects the N number of ultrasonic transducer being attached thereto again while executing step 3
Eigentone, and the eigentone of N number of ultrasonic transducer is updated, by updated N number of intrinsic vibration
Frequency carries out sort ascending again, is denoted as f respectively1、f2、f3、…、fN-1、fN, step 3 is then executed repeatedly.
By the real-time update to N number of energy converter eigentone, the real-time dynamic self-adapting of mode of sequence can be taken turns
So that each ultrasonic transducer is entered frequency matching resonance state successively and improves energy converter to export the ultrasonic power of bigger
The ultrasonic wave of group exports general power.
Using the ultrasonic signal generator of the present invention, its existing hardware design need not be changed, need to only be carried out corresponding
Software modification can be realized, reduce product up-gradation cost.By output frequency scanning drive signal, in a manner of taking turns sequence according to
It is secondary make each ultrasonic transducer enter frequency matching resonance state can improve transducing to export the ultrasonic power of bigger
The ultrasonic wave of device group exports general power, improves electro-acoustic transfer efficiency.
Claims (5)
1. a kind of intelligently sweeping frequency method of ultrasonic signal generator, the ultrasonic wave for being connected with N number of ultrasonic transducer is believed
Number generator, N are the natural number more than or equal to 2, it is characterised in that：Include the following steps
Step 1, parameter presets stage, following parameter is set：Frequency sweep initial frequency fstart, terminate frequency fstop, sweep interval
fstep, sweep times N in advanceinit, relative frequency difference RFD, relative frequency step pitch RFS and relative frequency step pitch multiplying power k；
Step 2, initialization pre-scan phase, for ultrasonic signal generator while carrying out initialization prescan, detection is therewith
The eigentone of N number of ultrasonic transducer of connection, and the eigentone of N number of ultrasonic transducer is incremented by
Sequence, is denoted as f respectively1、f2、f3、…、fN-1、fN.Initialization pre-scan phase includes the following steps：
Step (2-1) carries out linear frequency prescan：The driving frequency of ultrasonic signal generator output is by frequency sweep initial frequency
fstartStart, interval successively increases sweep interval f at every fixed timestep, until the drive of ultrasonic signal generator output
Dynamic frequency, which increases to, terminates frequency fstop；
Step (2-2) repeats step step (2-1) NinitIt is secondary, times N is swept in advanceinitFor the natural number more than or equal to 1；
Step 3, intelligently sweeping frequency stage, by initial frequency fstartIt is assigned a value of (1-RFD) × f1, frequency f will be terminatedstopIt is assigned a value of (1+
RFD)×fN, sweep interval fstepIt is constant to remain initial value, wherein RFD is preset relative frequency difference；If ultrasonic signal is sent out
The driving frequency that raw device currently exports is fcur, fcurInitial value be equal to initial frequency fstart=(1-RFD) × f1；Intelligently sweeping frequency
Stage specifically comprises the following steps：
Step (3-1) judges fcurWhether f is more thanstop：If so, this intelligently sweeping frequency terminates；If not, entering step (3-2)；
Step (3-2) judgesWhether preset relative frequency difference RFD is more than：If so, entering step (3-3)；If not,
Enter step (3-6), wherein i=1,2,3 ..., N, the initial value of i is 1；
Step (3-3) judges fcurWhether f is more thani+1：If so, the value of i is added 1, it is then back to step (3-3)；If not, into
Enter step (3-4)；
Step (3-4) judgesWhether preset relative frequency difference RFD is less than：If so, entering step (3-5)；Such as
It is no, by sweep interval fstepIt is assigned a value of k*RFS*fi, wherein RFS is preset relative frequency step pitch, relative frequency step pitch multiplying power k
For the preset constant not less than 1, subsequently into step (3-6)；
The value of i is added 1 by step (3-5), by sweep interval fstepIt is assigned a value of RFS*fi, wherein RFS is preset relative frequency
Step pitch, subsequently into step (3-6)；
Step (3-6), the driving frequency for currently exporting ultrasonic signal generator are fcurIt is assigned a value of fcurIn addition sweep interval
fstep, it is then back to step (3-1).
2. the intelligently sweeping frequency method of ultrasonic signal generator according to claim 1, it is characterised in that：The intelligence is swept
The frequency stage further includes step (3-7), repeats step (3-1) to step (3-6) X time, and the value of X is the natural number more than or equal to 1.
3. the intelligently sweeping frequency method of ultrasonic signal generator according to claim 1 or 2, it is characterised in that：Ultrasonic wave
Signal generator detects the eigentone for the N number of ultrasonic transducer being attached thereto again while executing step 3,
And be updated the eigentone of N number of ultrasonic transducer, updated N number of eigentone is incremented by again
Sequence, is denoted as f respectively1、f2、f3、…、fN-1、fN, step 3 is then executed repeatedly.
4. the intelligently sweeping frequency method of ultrasonic signal generator according to claim 1, it is characterised in that：Parameter presets
The parameter being arranged is needed to be directly read from the storage unit of ultrasonic signal generator in stage, or by user setting.
5. the intelligently sweeping frequency method of ultrasonic signal generator according to claim 1, it is characterised in that：It is preset opposite
The value range of difference on the frequency RFD is 0.2%~1.5%；Value range of the preset relative step away from RFS is 0.01%~0.2%；
The value range of relative frequency step pitch multiplying power k is 1.2~5.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114264882A (en) * | 2021-12-24 | 2022-04-01 | 深圳市泰达智能装备有限公司 | Equivalent parameter measuring method and device of ultrasonic transducer and controller |
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