CN109560619A - The frequency setting method for penetrating metal energy transmission is realized using piezoelectric ceramics - Google Patents
The frequency setting method for penetrating metal energy transmission is realized using piezoelectric ceramics Download PDFInfo
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- CN109560619A CN109560619A CN201811490824.6A CN201811490824A CN109560619A CN 109560619 A CN109560619 A CN 109560619A CN 201811490824 A CN201811490824 A CN 201811490824A CN 109560619 A CN109560619 A CN 109560619A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/15—Circuit arrangements or systems for wireless supply or distribution of electric power using ultrasonic waves
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Abstract
The present invention relates to a kind of frequency setting methods for being realized using piezoelectric ceramics and penetrating metal energy and transmitting, comprising: 1) frequency modulation initial frequency is arranged, terminates frequency and stepped intervals；2) system obtains first maximum power and corresponding frequency at the extreme value by power detection since initial frequency；3) pass through the first minimum power and the minimum power respective frequencies after power detection the first maximum power of acquisition；4) thickness of metal baffle is calculated；5) all frequency points for meeting that metal mask thickness is sound wave half-wavelength integral multiple are calculated according to the velocity of sound in metal mask thickness and metal baffle；6) the corresponding maximum performance number of all frequency points in power detection tuning range, is stored in system for maximum value power and its corresponding frequency optimum traffic；7) system work is in the corresponding frequency optimum traffic of maximum power and with maximum power powering load.Compared with prior art, the present invention has many advantages, such as to realize maximum power for load charging.
Description
Technical field
The present invention relates to wireless energy transmission technology fields, penetrate metal using piezoelectric ceramics realization more particularly, to a kind of
The frequency setting method of energy transmission.
Background technique
All the time, drilling wiring is to penetrate Underwater Battery, submarine navigation device, above water craft, aerospace equipment, nuclear energy
The main method of the metal shells such as equipment and oil pipeline realization energy transmission.But drilling wiring method is inevitably
The airtightness of metal structure is destroyed, use and protective benefits of the metal shell to personnel and important equipment are reduced.
Due to the powerful Faraday shield effect of metal shell, based on technologies such as electromagnetic wave, inductive coupling and capacitive couplings
Energy transmission method be difficult to apply.Since mechanical wave can penetrate metal class elastic fluid, piezoelectric material can be realized higher
The electric signal and mechanical wave of efficiency are converted mutually, and therefore, there has been proposed penetrate metal energy using PZT (piezoelectric transducer) realization to pass
Transferring technology.
Although when lower piezoelectric delivery of energy technology is widely used in penetrating metal realization wireless energy, for one species
Energy converter, the optimum resonance frequency point of Different Individual, since to will lead to best frequency point endless for the nuance of manufacture craft and material
It is complete consistent.For same a pair of of piezoelectric ceramic transducer, it is coupled to metal baffle, the resonance frequency point after installing can also deviate.It changes
The optimum resonance frequency point of energy device is not certain value.
In addition, in penetrating metal energy transmission process, since metal baffle and energy converter acoustic impedance mismatch, incident sound
Wave can occur to reflect and transmit in the interface that energy converter is connected with metal.When metal mask thickness is 1/4 wavelength even number of sound wave
Again when (half-wavelength integral multiple), intensity in transmission is maximum；When metal mask thickness is 1/4 wavelength odd-multiple of sound wave, intensity in transmission
It is minimum.
In practical application scene, each metal baffle is of different types under different occasions, and environment temperature is different, and sound wave exists
The velocity of sound in the metal is different to cause wave length of sound different.For under same metal baffle same temperature, even if sound wave wave
It is long the same, but metal mask thickness is different, being equally unable to satisfy metal mask thickness is precisely energy converter optimum resonance frequency
The half-wavelength integral multiple relation of the corresponding wavelength of point.
In conclusion under different temperatures, penetrate variety classes, different-thickness metal baffle automatic frequency adjustment it is efficient
Rate charging method research is extremely urgent.
Summary of the invention
Piezoelectric ceramics is utilized it is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide a kind of
Realize penetrate metal energy transmission frequency setting method, at a temperature of solving varying environment, ultrasonic wave penetrate variety classes,
For in load charging process, automatic frequency adjustment meets metal panel with a thickness of sound wave half-wave lint-long integer when different-thickness metal baffle
Times relationship realizes that system maximal efficiency is load charging.
The purpose of the present invention can be achieved through the following technical solutions:
It is a kind of to realize the frequency setting method for penetrating metal energy transmission using piezoelectric ceramics, comprising the following steps:
1) according to the frequency band after energy converter optimum resonant frequency and wideband impedance match, frequency modulation initial frequency f is set1, eventually
Only frequency f2With stepped intervals Δ f；
2) system is pressed stepped intervals stepping frequency modulation in frequency range, is obtained by power detection since initial frequency
First maximum power Pmax1With frequency f corresponding at the extreme valuemax1；
3) system obtains first minimum power P after the first maximum power by power detectionmin1And it should
Minimum power respective frequencies fmin1；
4) according to frequency f corresponding at maximum powermax1With frequency f corresponding at minimum powermin1, calculate gold
Belong to the thickness d of baffle；
5) system is calculated according to velocity of sound υ in metal mask thickness d and metal baffle meets metal mask thickness for sound wave
All frequency point f of half-wavelength integral multiplemax n；
6) all frequency point f in power detection tuning rangemax nCorresponding maximum performance number Pmax n, by maximum value power
Pmax=max { Pmax1,Pmax2...Pmax nAnd its corresponding frequency optimum traffic fmaxIt is stored in system；
7) system work is in the corresponding frequency optimum traffic f of maximum powermaxAnd with maximum power PmaxPowering load.
Preferably, the fmax1It is by stepping frequency modulation, gradually convergence adjusts and tests institute using power-sensing circuit
?.
Preferably, the fmin1It is by stepping frequency modulation, gradually convergence adjusts and tests institute using power-sensing circuit
?.
Preferably, the metal mask thickness d is calculated as follows:
Wherein υ is the velocity of sound in metal baffle, and n is the number of sound wave half-wavelength in metal baffle, and d and n needs solve
Unknown number is solved to obtain by above-mentioned two equation.
Preferably, described calculated according to velocity of sound υ in metal mask thickness d and metal baffle meets metal mask thickness
For all frequency point f of sound wave half-wavelength integral multiplemax n
Wherein n=1,2,3..., υ are the velocity of sound in metal baffle, and n is the number of sound wave half-wavelength in metal baffle, and d is gold
Belong to mask thickness.
Preferably, the frequency optimum traffic fmaxSelection mechanism be several metal mask thickness that meet be sound wave half
Wavelength integral multiple frequency point fmax nCorresponding performance number relatively gained.
Compared with prior art, the present invention uses ultrasonic wave as the carrier for penetrating metal baffle transmission energy, according to gold
Belong to the adaptive adjustment optimal charge frequency such as material and thickness, environment temperature of plate, realizes that maximum power is load charging.
Detailed description of the invention
Fig. 1 is the schematic block circuit diagram that the present invention is implemented.
Fig. 2 is that acoustic signals propagate schematic diagram in energy channel.
Fig. 3 is that sound wave penetrates 12mm metal aluminum sheet S parameter test result figure.
Fig. 4 is that the present invention realizes the frequency setting method general flow chart for penetrating metal energy transmission using piezoelectric ceramics.
Appended drawing reference
1, signal generator 2, prime operational amplifier 3, power amplifier 4, wideband impedance match
5, transmitting transducer 6, metal baffle 7, reception energy converter 8, wideband impedance match
9, full-bridge rectification 10, load 11, MCU controller 12, power-sensing circuit
13, couplant
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiment is a part of the embodiments of the present invention, rather than whole embodiments.Based on this hair
Embodiment in bright, those of ordinary skill in the art's every other reality obtained without making creative work
Example is applied, all should belong to the scope of protection of the invention.
Schematic block circuit diagram as shown in Figure 1 includes transmitting terminal, energy channel and receiving end.Transmitting terminal MCU controls signal hair
Raw device generates continuous carrier, and continuous carrier completes impedance matching after primary amplification and power amplification, the electric signal after matching
It is loaded into transmitting transducer, and is transmitted to reception energy converter by energy channel.Power detecting system to realize the present invention from
Dynamic frequency modulation, using maximal efficiency as internal transmission energy.In receiving end, through connecing impedance after the received energy converter pickup of power signal
Match, full-bridge rectifier filter, powers for internal load.
Acoustic signals as shown in Figure 2 propagate schematic diagram in energy channel.Sound wave is penetrating metal baffle realization energy biography
During defeated, since metal baffle acoustic impedance and energy converter acoustic impedance mismatch, incident acoustic wave is receiving energy converter and metal company
The interface connect can occur to reflect and transmit.The direction of back wave and incidence wave are contrary, and back wave travels to transmitting transducing
The interface of device and metal baffle can be reflected again, and multiple reflections can have multipath effect.Transmitted wave signal is directly projected to
It receives in energy converter.
Sound wave as shown in Figure 3 penetrates 12mm aluminum metal baffle S parameter test result figure.Network Analyzer is in 100KHz-
Between 2MHz, one electric signal of frequency sweep is after energy converter passes through 12mm metal baffle, distribution character of the signal amplitude with frequency, S11
For reflection coefficient, S21For positive transmission coefficient.Meeting metal mask thickness in metal mask thickness is 1/4 wavelength even-multiple of sound wave
At frequency point, S21It is very big, S11Very little；Meeting metal mask thickness in metal mask thickness is 1/4 wavelength odd-multiple frequency point of sound wave
Place, S21Very little, S11It is very big；
Being that the present invention is a kind of as shown in Figure 4 realizes the frequency setting method stream for penetrating metal energy transmission using piezoelectric ceramics
Journey schematic diagram.The following steps are included:
1) according to the frequency band after energy converter optimum resonant frequency and wideband impedance match, frequency modulation initial frequency f is set1, eventually
Only frequency f2With stepped intervals Δ f；
2) system is pressed stepped intervals stepping frequency modulation in frequency range, is obtained by power detection since initial frequency
First maximum power Pmax1With frequency f corresponding at the extreme valuemax1；
3) system obtains first minimum power P after the first maximum power by power detectionmin1And it should
Minimum power respective frequencies fmin1；
4) according to frequency f corresponding at maximum powermax1With frequency f corresponding at minimum powermin1, calculate gold
Belong to the thickness d of baffle；
5) system is calculated according to velocity of sound υ in metal mask thickness d and metal baffle meets metal mask thickness for sound wave
All frequency point f of half-wavelength integral multiplemax n；
6) all frequency point f in power detection tuning rangemax nCorresponding maximum performance number Pmax n, by maximum value power
Pmax=max { Pmax1,Pmax2...Pmax nAnd its corresponding frequency optimum traffic fmaxIt is stored in system；
7) system work is in the corresponding frequency optimum traffic f of maximum powermaxAnd with maximum power PmaxPowering load.
Wherein fmax1、fmin1It is by stepping frequency modulation, gradually convergence adjusts and utilizes power-sensing circuit test gained.
Wherein the calculation method of thickness d is as follows:
Wherein frequency optimum traffic fmaxSelection mechanism be several metal mask thickness that meet be sound wave half-wavelength integral multiple
Frequency point fmax nCorresponding performance number relatively gained.
Wherein fmax nCalculation method it is as follows:
The present invention uses ultrasonic wave as the carrier for penetrating metal baffle transmission energy, according to the material and thickness of metal plate
Degree, environment temperature etc. adaptively adjust optimal charge frequency.It solves under different application, metal mask thickness cannot be complete
Sound wave half-wavelength integral multiple problem at full matching energy converter optimum resonance frequency point, by automatic in the frequency range of Broadband Matching
It is sound wave half-wavelength integral multiple that frequency modulation, which meets metal mask thickness,.It realizes that maximum power is load charging, saves system energy consumption, mention
High recharge efficiency.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can readily occur in various equivalent modifications or replace
It changes, these modifications or substitutions should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with right
It is required that protection scope subject to.
Claims (6)
1. a kind of realize the frequency setting method for penetrating metal energy transmission using piezoelectric ceramics, which is characterized in that including following
Step:
1) according to the frequency band after energy converter optimum resonant frequency and wideband impedance match, frequency modulation initial frequency f is set1, terminate frequency
f2With stepped intervals Δ f；
2) system presses stepped intervals stepping frequency modulation since initial frequency in frequency range, obtains first by power detection
A maximum power Pmax1With frequency f corresponding at the extreme valuemax1；
3) system obtains first minimum power P after the first maximum power by power detectionmin1And the minimum
Power respective frequencies fmin1；
4) according to frequency f corresponding at maximum powermax1With frequency f corresponding at minimum powermin1, calculate metal barrier
The thickness d of plate；
5) system is calculated according to velocity of sound υ in metal mask thickness d and metal baffle meets metal mask thickness for sound wave half-wave
All frequency point f of lint-long integer timesmaxn；
6) all frequency point f in power detection tuning rangemaxnCorresponding maximum performance number Pmaxn, by maximum value power Pmax=
max{Pmax1,Pmax2...PmaxnAnd its corresponding frequency optimum traffic fmaxIt is stored in system；
7) system work is in the corresponding frequency optimum traffic f of maximum powermaxAnd with maximum power PmaxPowering load.
2. a kind of frequency setting method that metal energy transmission is penetrated using piezoelectric ceramics realization according to claim 1,
It is characterized in that, the fmax1It is by stepping frequency modulation, gradually convergence adjusts and utilizes power-sensing circuit test gained.
3. a kind of frequency setting method that metal energy transmission is penetrated using piezoelectric ceramics realization according to claim 1,
It is characterized in that, the fmin1It is by stepping frequency modulation, gradually convergence adjusts and utilizes power-sensing circuit test gained.
4. a kind of frequency setting method that metal energy transmission is penetrated using piezoelectric ceramics realization according to claim 1,
It is characterized in that, the metal mask thickness d calculating is as follows:
Wherein υ is the velocity of sound in metal baffle, and n is the number of sound wave half-wavelength in metal baffle, and it is unknown that d and n be that needs solve
Number, is solved to obtain by above-mentioned two equation.
5. a kind of frequency setting method that metal energy transmission is penetrated using piezoelectric ceramics realization according to claim 1,
It is characterized in that, described calculated according to velocity of sound υ in metal mask thickness d and metal baffle meets metal mask thickness for sound
All frequency point f of wave half-wavelength integral multiplemaxn
Wherein n=1,2,3..., υ are the velocity of sound in metal baffle, and n is the number of sound wave half-wavelength in metal baffle, and d is metal barrier
Plate thickness.
6. a kind of frequency setting method that metal energy transmission is penetrated using piezoelectric ceramics realization according to claim 1,
It is characterized in that, the frequency optimum traffic fmaxSelection mechanism be several metal mask thickness that meet be sound wave half-wavelength
Integral multiple frequency point fmaxnCorresponding performance number relatively gained.
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| CN201811490824.6A CN109560619B (en) | 2018-12-06 | 2018-12-06 | Frequency setting method for realizing penetrating metal energy transmission by utilizing piezoelectric ceramics |
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| CN201811490824.6A CN109560619B (en) | 2018-12-06 | 2018-12-06 | Frequency setting method for realizing penetrating metal energy transmission by utilizing piezoelectric ceramics |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105406611A (en) * | 2015-10-28 | 2016-03-16 | 中国人民解放军国防科学技术大学 | Device and method of determining through-metal wall ultrasonic sound wireless energy transmission channel optimization frequency |
| CN106253499A (en) * | 2016-08-17 | 2016-12-21 | 桐城市闲产网络服务有限公司 | A kind of novel ultrasound wave Contactless Power Transmission System based on PZT |
| US20170201131A1 (en) * | 2014-06-25 | 2017-07-13 | Dalhousie University | Power Links and Methods for Improved Efficiency |
| US20180191200A1 (en) * | 2007-12-21 | 2018-07-05 | Philips Ip Ventures B.V. | Inductive power transfer |
-
2018
- 2018-12-06 CN CN201811490824.6A patent/CN109560619B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20180191200A1 (en) * | 2007-12-21 | 2018-07-05 | Philips Ip Ventures B.V. | Inductive power transfer |
| US20170201131A1 (en) * | 2014-06-25 | 2017-07-13 | Dalhousie University | Power Links and Methods for Improved Efficiency |
| CN105406611A (en) * | 2015-10-28 | 2016-03-16 | 中国人民解放军国防科学技术大学 | Device and method of determining through-metal wall ultrasonic sound wireless energy transmission channel optimization frequency |
| CN106253499A (en) * | 2016-08-17 | 2016-12-21 | 桐城市闲产网络服务有限公司 | A kind of novel ultrasound wave Contactless Power Transmission System based on PZT |
Non-Patent Citations (1)
| Title |
|---|
| FALONG HUANG等: "Modeling and Evaluation on through-metal Power Transfer Using Piezoelectric Transducer", 《2018 10TH INTERNATIONAL CONFERENCE ON WIRELESS COMMUNICATIONS AND SIGNAL PROCESSING (WCSP)》 * |
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