CN1362614A - Rotary non-contact bidrectional synchronous signal and power transmitting system and method - Google Patents
Rotary non-contact bidrectional synchronous signal and power transmitting system and method Download PDFInfo
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Abstract
The non-contact bidirectional multi-channel signal and power synchronous transmission system comprises integrated signal regualting circuit which is formed from sensor, driver, signal amplifier, power amplifier, modulator, multiplexer, demodulator, splitter and power supply and fixed on the rotating component, integrated signal regulating circuit which is formed from computer data acquisition and control system, demodulator, splitter, modualtor, multiplexer and power supply and placed on the fixed component and non-content signal coupler. Said invention adopts frequency modualtion mode to make signal modualtion, adopts frequency division multiplex mode to make transmission of multichannel signal on one physical passage and directly uses electromagnetic coupling to implement power coupling. It is mainly used for measurement and control of rotating component system.
Description
Technical field
Contactless two-way multiple signals of revolving part of the present invention and power synchronous transmission system and method belong to the monitoring and the control technology of revolving part mechanical structure system.
Background technology
To carry out monitoring structural health conditions and the real-time Active Vibration Control of closed loop to the revolving part mechanical system, just need and control required power supply etc. at rotary part with fixedly transmit mutually between the support multichannel measurement signal, multi-way control signals.Up to now, be rotated two kinds of the collector ring mode that mainly contains of part signal transmission and remote measuring and controlling modes.Utilize the collector ring mode to carry out data transmission and have that functional reliability is poor, signal is disturbed easily, require frequent maintenance and replacement, increasing the transmission channel number need shortcoming such as change to structure; The remote measuring and controlling mode, generally be to be used for the multiple signals of the rotary part that will collect to be transferred to ground, but it is also very difficult that the real time modelling control signal of multichannel is made reverse transfer, particularly can not carry out power delivery, can not control the required energy for rotary part provides, thereby also can't carry out real-time closed-loop control revolving part.
Summary of the invention
Technical matters to be solved by this invention be development a kind of reliable operation, antijamming capability strong, can avoid for a long time safeguarding, contactless two-way multiple signals and power synchronous transmission system and the method that can monitor and control revolving part be with the needs of the health monitoring, closed loop Active Vibration Control and other closed loop ACTIVE CONTROL that satisfy various rotating machinery structures.For solving the problems of the technologies described above, the composition of native system comprises the integrated signal modulate circuit that is fixed on the revolving part that rotates with rotating shaft on the revolving part, comprising that sensor is connected in is connected in the modulator that links to each other with non-contact signal coupling mechanism data feedback channel moving-coil after being connected in the modulator that links to each other with non-contact signal coupling mechanism down going channel moving-coil behind the signal amplifier again and driver being connected in power amplifier again, signal amplifier, power amplifier also are connected in power supply coupled system secondary respectively; With the integrated signal modulate circuit on the fixture that can not rotate that places on fixture or the housing, comprise computer data acquiring and control system be connected in respectively with the non-contact signal coupling mechanism upper and lower two not the detuner that links to each other of moving-coil with modulator and link to each other with the former limit of power supply coupled system; And place the non-contact signal coupling mechanism that up coupling channel, descending coupling channel and power coupling channel are formed that comprises between revolving part and the fixture to constitute.
The multichannel baseband signal, comprise measuring-signal and control signal, through ovennodulation and multiplexed, becoming the signal that is suitable for carrying out coupled transfer on a physical channel transmits, thereby the multichannel measurement signal reached on the fixture or with multi-way control signals from revolving part make reverse transfer, this is the basic skills that native system adopts.
Native system adopts frequency modulation (PFM) mode (FM) to carry out the modulation of signal, and the mode of employing frequency division multiplex is at a thing
Carry out the transmission of multiple signals on the reason passage.Modulation is that amplitude, frequency and the phase angle of instigating a high-frequency signal change with the low frequency signal amplitude.Modulator approach generally is divided into which amplitude modulation mode (AM), frequency modulation (PFM) mode (FM) and pulse code modulation (PCM) mode (PCM) etc.
The pcm encoder mode is more advanced signal transmission form, but the PCM system complex, the cost height.The antijamming capability and the transmission precision of amplitude modulation (AM) mode are lower, thereby mode of frequency regulation is adopted in the measuring-signal transmission in the native system, and simple in order to bring into play AM mode circuit, the phase lag in the signal transmission is little, the easy advantage that realizes, the AM mode is adopted in the transmission of native system control signal.Because in the electromagnetic coupled system, transmission signals is strong, magnetic circuit closed, thereby the signal to noise ratio (S/N ratio) height, solves 3 and makes transmission precision and antijamming capability all obtain bigger raising.
The principle of work of native system is: the multichannel output signal of imbedding the sensor on the revolving part, through the integrated signal modulate circuit on the revolving part amplify, filtering, modulation and multiplexed after, descending coupling channel by the non-contact signal coupling mechanism is coupled on the fixture, signal conditioning circuit on the fixture is reduced into former multichannel measurement signal after signal is carried out demodulation along separate routes; Computing machine is gathered multiple signals, through exporting multi-way control signals after the adaptive control computing, this control signal by the comprehensively regulating circuit on the fixture modulate with multiplexed after, data feedback channel by the noncontact coupling mechanism is coupled on the revolving part on the integrated signal modulate circuit, this place through demodulation, along separate routes, amplify (normally high pressure amplification) after, actuator on the driven in rotation part is finished the ACTIVE CONTROL on the revolving part; Required all power supplys on the revolving part all provide by the power coupling channel on the other hand; A multichannel measurement and a control system have so just been formed based on the rotating machinery of non contact signal transmission.
Because the non contact signal transmission system does not have sliding contact, thereby do not need often to safeguard replacing, less demanding to environmental baseline, can move reliably and with long-term.
The core component of native system is the non-contact signal coupling mechanism, needs transferring high voltage power signal and multichannel low pressure high frequency measurement and control signal simultaneously.It comprises pickup coil and respective magnetic circuit two partly, need low pressure measurement and control signal and high-voltage power signal be arranged by the coupled transfer signal.Concrete structure is, three groups of noncontact coupling channels are housed between shell and rotary middle spindle, the up coupling channel that the last coupled pair of forming with moving-coil and moving-coil is not constituted by last magnetic jar, by descend the magnetic jar to moving-coil and not the coil formed of moving-coil to descending coupling channel that constitutes and the power coupling channel that is constituted by inside and outside magnet ring of power supply magnetic circuit and the former and deputy limit of power supply coupled system; Every group can be divided into two parts, and a part links to each other with rotary middle spindle, and rotation therewith, and another part links to each other with shell, and it is static with respect to shell.These two parts are actually the former limit and the secondary of coupling channel, and they match mutually, and the ultimate principle of these three groups of coupling channels is identical, but according to different requirements, select suitable core material, magnetic structure and coil parameter.
Description of drawings
The composition frame chart of Fig. 1, the contactless two-way multiple signals of revolving part and power synchronous transmission system.
Fig. 2, non-contact signal coupler structure synoptic diagram.
Fig. 3, (a) power amplifier composition frame chart, (b) power amplifier is implemented circuit theory diagrams.
The schematic diagram of Fig. 4, modulation circuit.
Fig. 5, linear detection schematic diagram.
Fig. 6, the theory diagram that utilizes noncontact coupled circuit realization frequency division multiplex signal to transmit.
Fig. 7, native system and method are used for helicopter Smart Rotor model test system.
Label title among Fig. 1: 1, sensor, 2, driver, 3, signal amplifier, 4, power amplifier, 5, modulator and multiplexer, 6, power supply, 7, detuner and shunt, 8, the non-contact signal coupling mechanism, 9, detuner and shunt, 10, power supply, 11, modulator and multiplexer, 12, computer data acquiring and control system.
Label declaration among Fig. 2: 21, shell, 22, upward the magnetic jar is right, 23, go up coupled pair, 24 power supply magnetic circuit outer magnetic rings, 25, the former limit of power supply coupled system, 26, the magnetic jar is right down, 27, following coupled pair, 28, turning axle, 29, power supply coupling secondary, 30, power supply magnetic circuit internal magnetic ring, 31, the lead-in wire groove.
Label declaration among Fig. 7 (a): 1, the integrated signal modulate circuit on the revolving part, 2, non-contact signal coupling mechanism, 3, pedestal, 4, turning axle, 5, wheel box, 6, buncher, 7, electric machine controller, 8, system's supervisory control desk, 9, the observing and controlling computing machine, 10, revolving part test specimen, piezoelectric sensor and piezoelectric drive element
Embodiment
Shown in Figure 1 is the theory diagram of native system.Comprise sensor, driver, signal amplifier, power amplifier, modulator and multiplexer, detuner and shunt, power supply, computer control, adaptive algorithm etc.Narration respectively below:
(1) sensor and driver are two function element, as the piezoelectric of function element, require to have positive inverse piezoelectric effect simultaneously, frequency response is wide, be easy to arrange in compound substance that compatibility is good.Therefore, can adopt piezoceramic material, this material has These characteristics.How power component is arranged in revolving part is very important, if be disposed on node or the nodel line, vibration control just can not reach good effect.In addition, in order to take all factors into consideration the weight of control system, the complexity of cost and control also must be optimized design to the quantity of piezoelectric sensor and piezoelectric drive element.In reversing the revolving part of driving, should stick on the both side surface at same position to distributed piezoelectric sensor and piezoelectric drive element, constitute modal sense/driver.Utilize this composition element, structural vibrations is realized coordination control, can avoid control to overflow.
(2) signal amplifier
Sensor generally adopts piezoelectric sensor, and the stressed rear surface of this class component produces electric charge, therefore preferably adopts charge amplifier that electric charge is converted into the normal voltage signal, offers modulator.
(3) power amplifier
Driver preferably adopts piezoelectric ceramic piece, after adding certain voltage on two electrodes of piezoelectric ceramic piece, because contrary the pressure
Electrical effect effect, on a certain direction of piezoelectric patches, can produce distortion.Experiment shows under certain driving voltage, has well linearity between distortion and the driving voltage, and the magnitude of voltage that applies is big more, and the distortion that is produced is also big more.Piezoelectric actuator must encourage with high voltage, and still, the output voltage of control circuit is generally at 0-5V ,-5～5V, and 0～10V in the scopes such as-10～10V, thereby needs design high-voltage power amplifier that control signal is carried out voltage amplification.Drive for satisfying the needs of Piezoelectric Ceramic, should be the most basic requirement of high-voltage power amplifier:
(a), the low voltage signal of controller output can be zoomed into the signal that meets the demands, and precision preferably to be arranged;
(b), the signal after amplifying should have less phase distortion, this point is even more important to the amplification of high-frequency signal.
The theory of constitution block diagram of this power amplifier is shown in Fig. 3 (a), and it is made up of low-tension supply, high-voltage power supply, floating power supply, preamplifier state, high-low pressure isolation level and high-voltage power amplification etc.
(3.1), low, high power supply:
The high-voltage power amplifier is the amplifier that low-voltage signal is zoomed into high-voltage signal, to the low pressure amplifier section, must provide low-tension supply, this power supply amplitude is-15V and+15V.And to the high pressure amplifier section, must provide high-voltage power supply, this power supply amplitude be-600 and+600V.Also must adopt photoisolator to isolate between the high and low power supply, disturb even destroy in case high-pressure section causes the electric leakage of low-pressure section.Must add unsteady bias voltage so that its operate as normal also must provide two unsteady power supplys on the high-voltage power pipe simultaneously, this power supply amplitude is 10V.
(3.2), preposition amplification and power amplification:
The amplifier section schematic diagram of high-voltage power amplifier is shown in Fig. 3 (b).Among the figure, the in-phase input end of amplifier U5:A connects the input of power amplifier, and has two stabilivolts of placing back-to-back to be used to provide input protection, limits too high input voltage.Its reverse input end forms feedback by the output terminal of related circuit and power amplifier.Two optocoupler H11B1 finish electrical isolation and the level conversion between the high-low pressure.The DC-DC transducer provides bias voltage to triode.To pipe T
5, T
6Form and recommend output, T
3, T
4Overcurrent protection function is provided.In addition, hot protective relay is installed also on the heat radiator of triode, so that the overheating protection of triode to be provided.
(3.3), modulation circuit:
Modulation circuit adopts the balance modulator-demodular unit of MC1596, and its electric principle as shown in Figure 4.MC1596 is equivalent to a multiplier.Needs+12V power supply and-bias voltage of 8V.C among the figure
2Carrier signal is coupled to the carrier wave input end of modulator, and the line level of going forward side by side moves, C
3The DC component of isolating output terminal makes output obtain the AC signal of symmetry.In order to drive pickup coil, output is recommended the power amplifier that triode forms through one by operational amplifier and two and is carried out suitable power amplification.R
1The gain of control modulator.For fear of the amplitude modulation phenomenon in certain input reference signal, occurring.Available potentiometer P
1Carrying out the zero point of output waveform adjusts.Left-half is by double operational O among the figure
3The circuit of forming with respective element is a sine-wave generator, is used for providing carrier signal to MC1596.R wherein
22, C
8, C
7, R
21Form the positive feedback frequency selection network.Diode D
3, resistance R
19, capacitor C
6With potentiometer P
3Control work reaches the purpose of autostable sine wave output amplitude at the drain-source resistance of the field effect transistor of variable resistor state.
(3.4), linear detector:
The also available MC1596 of the demodulation of signal realizes that circuit form is similar to modulation circuit, and only the back has added the one-level wave filter and is used for the useless carrier component of filtering.
For the ordinary amplitude modulation mode, available diode envelope detection and linear detection carry out demodulation, and its circuit is simple, and principle is directly perceived.Its linear detection circuit schematic diagram as shown in Figure 5.When being input as timing, O
2: A is output as negative, D
1By, D
2Conducting is by R
14Form negative feedback, wave detector is output as negative, works as R
12=R
14The time, its value equals input value; When being input as when negative, amplifier just is output as, D
1Conducting, D
2End, also form negative feedback this moment, is 0 because the amplifier imaginary short makes amplifier negative input end current potential, causes being output as zero.Thereby the envelope of output waveform is exactly modulated low frequency signal after the detection of modulated wave process, and the minimum detection operating voltage of above wave detector can reach several microvolts.This signal is carried out low-pass filtering, but just elimination high-frequency signal obtains being proportional to the mean value of modulated wave envelope, potentiometer P
5Link to each other with ground with positive supply respectively, be used for providing direct current biasing, also regulate Shu Chu zero point simultaneously by it to amplifier.
(3.5), frequency modulation and multiplexed
Adopt the FM technology to carry out the modulation of signal in the native system, adopt frequency division multiplexing (FDM) technology to carry out the transmission of multiple signals.The FDM technology is meant the method that adopts frequency partition, multiple signals is compounded in the technology that is sent to receiving terminal in the channel.Its ultimate principle is, adopts the modulation system of certain signal, with the frequency spectrum shift of multiple signals on the frequency range of non-overlapping copies.
Utilize theory diagram that the noncontact coupled circuit realizes FDM multiple signals transmission as shown in Figure 6.
Select for use the subcarrier of N different frequency to modulate respectively N road signal, make that the N road signal after the modulation is all moved on the frequency of each subcarrier, send into multiplexer then and comprehensively become composite signal to transmit.After receiving terminal is received signal, utilize N centre frequency to separate each road signal for the logical shunt of the band of respective sub carrier frequency, the bandwidth of the band ripple device of shunt should greater than or by the time in the bandwidth of each signal.At last, carry out the signal demodulation through detuner and just obtain baseband signal.
The non-contact signal coupling mechanism of native system is a critical component of realizing non contact signal transmission, and for the power coupling, key issue is to guarantee small size, high-power and high-transmission efficient.For this reason, power frequency AC is transformed into high-frequency alternating current by AC-DC-AC, is coupled by coil again, just can reduce the volume of coupling mechanism, improve its efficient.Yet the corresponding high-frequency magnetic material of the transmission of high-frequency signal requires magnetoconductivity height, resistivity big, make high-frequency signal by the time eddy current loss that produces little.But the magnetic material that is fit to high-frequency signal transmission is difficult to guarantee enough machining precisioies, thereby can not guarantee enough little air gap, also just can not guarantee enough high power transmission ratios, adopts the core material of pure iron as the noncontact coupling mechanism for this reason.In order to guarantee to transmit high-power needs, in Design and Machining, improve machining precision, reduce magnetic gap; For the signal coupling, key will be considered the signal transfer bandwidth and guarantee that when the revolving part main axis rotation magnetic circuit is constant, is through the signal after the high frequency carrier modulation owing to need the signal of coupling, thereby selects ferrite as corresponding core material.Guarantee the transmission precision of signal, therefore the workspace that also requires soft magnetic material will be designed and be tested the number of turn and the magnetic circuit of coil in the range of linearity.By the design magnetic structure, to guarantee when revolving part rotates, not changing magnetic circuit parameters, designed the pickup coil of circular ring type FERRITE CORE and circular ring type for this reason, make its magnetic line of force about the turning axle symmetry.Its concrete structure comprises 3 groups of electromagnetic coupled unit of being made up of toroid winding and magnetic core as shown in Figure 2.Each group coupling unit comprises a moving-coil (rotating together with the axis) and moving-coil (linking to each other with support) not, one group of transmission that is used for measuring-signal in 3 groups of coupling units, and one group of transmission that is used for control signal, another group is used for transferring high voltage power.
Fig. 7, be that native system and method are used for helicopter Smart Rotor vibration and noise ACTIVE CONTROL pilot system.This pilot system is imbedded the piezoelectric sensor of measuring blade vibration and the driver that drives the paddle distortion on paddle, also have for computer measurement and control system that carries out data acquisition, data processing and adaptive control and the driving mechanism that makes the rotor rotation, comprise support, motor, electric machine controller and gear train etc.In system with imbed paddle on the charge amplifier that links to each other of piezoelectric sensor, in order to cooperate piezoelectric sensor element to be rotated the strain measurement of part, the output of charge amplifier is connected to signal modulator and carries out amplitude modulation(PAM), the electromagnetic coupled system transmissions that signal is formed by coil and magnetic core is to the demodulator of PM signal PM that is installed on the body then, through after the demodulation, carry out filtering, obtain measured signal, deliver to the computer data acquiring card.Computing machine is by certain control strategy, calculate control corresponding output, control signal is reached high-voltage power amplifier on the revolving part through same method, be used for encouraging the piezoelectric drive element on the revolving part, make revolving part produce periodically deforming, change the aerodynamic loading of revolving part, suppress the vibration of revolving part.
After buncher commutated through slowing down, the rotation of driven in rotation part can obtain harmonic signal from rotary transformer, offers adaptive controller as the reference signal.
Shown in Fig. 7 (b) is the composition frame chart of this pilot system, comprehensively regulating circuit on the fixture that comprises the integrated signal modulate circuit on the revolving part of forming by piezoelectric sensor, piezoelectric actuator, charge amplifier, power amplifier, modulator, detuner, power supply and formed by amplifier, computer control, detuner, power supply, modulator etc. and the non-contact signal coupling mechanism of being formed by up coupling channel, descending coupling channel, power coupling channel.
The present invention is used for the measurement and the control of revolving part system, the health monitoring of for example torque measurement, temperature of rotor pressure and dynamic strain measurement, Active Vibration Control, rotating machinery etc.At dual-use industrial circle good application prospects is arranged all.
Claims (5)
1, the two-way multiple signals of a kind of revolving part noncontact and power synchronous transmission system and method, it is characterized in that, by the integrated signal modulate circuit that places on the revolving part, comprising that sensor is connected in is connected in the modulator that links to each other with non-contact signal coupling mechanism data feedback channel moving-coil after being connected in the modulator that links to each other with non-contact signal coupling mechanism down going channel moving-coil behind the signal amplifier again and driver being connected in power amplifier again, signal amplifier, power amplifier also are connected in power supply coupled system secondary respectively; Place the integrated signal modulate circuit on the fixture, comprise computer data acquiring and control system be connected in respectively with the non-contact signal coupling mechanism upper and lower two not the detuner that links to each other of moving-coil with modulator and link to each other with the former limit of power supply coupled system; Place the non-contact signal coupling mechanism that up coupling channel, descending coupling channel and power coupling channel are formed that comprises between revolving part and the fixture to constitute; The basic skills that native system adopts is to comprise the multichannel baseband signal of measuring-signal and control signal, through ovennodulation and multiplexed, become the signal that is suitable on a physical channel, carrying out coupled transfer and transmit, make reverse transfer thereby the multichannel measurement signal reached on the fixture or with multi-way control signals from revolving part.
2, the contactless two-way multiple signals of revolving part according to claim 1 and power synchronous transmission system and method, it is characterized in that, the non-contact signal coupling mechanism comprises three groups of noncontact coupling channels that are installed between shell and the rotary middle spindle: the up coupling channel that the last coupled pair of forming with moving-coil and moving-coil is not constituted by last magnetic jar, by descend the magnetic jar to moving-coil and not the coil formed of moving-coil to descending coupling channel that constitutes and the power coupling channel that is constituted by inside and outside magnet ring of power supply magnetic circuit and the former and deputy limit of power supply coupled system.
3, the contactless two-way multiple signals of revolving part according to claim 1 and 2 and power synchronous transmission system and method, it is characterized in that, the composition of power amplifier is, pre-amplification circuit links to each other with low-tension supply, the high pressure power amplifier links to each other with floating power supply with high-voltage power supply respectively, also is connected with photoelectric isolating circuit between pre-amplification circuit and the high pressure power amplifier.
4, the contactless two-way multiple signals of revolving part according to claim 1 and 2 and power synchronous transmission system and method, it is characterized in that, utilize the noncontact coupled circuit to realize that the method for frequency division multiplex signal transmission is, multiple signals are sent into multiplexer respectively and are comprehensively become composite signal behind modulator separately, be transferred to detuner and shunt by the noncontact coupling channel, after shunt and demodulation, signal is reduced into former multichannel baseband signal.
5, the contactless two-way multiple signals of revolving part according to claim 3 and power synchronous transmission system and method, it is characterized in that, utilize the noncontact coupled circuit to realize that the method for frequency division multiplex signal transmission is, multiple signals are sent into multiplexer respectively and are comprehensively become composite signal behind modulator separately, be transferred to detuner and shunt by the noncontact coupling channel, after shunt and demodulation, signal is reduced into former multichannel baseband signal.
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| CNB021125635A CN1195200C (en) | 2002-01-21 | 2002-01-21 | Rotary non-contact bidrectional synchronous signal and power transmitting system and method |
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| CNB021125635A CN1195200C (en) | 2002-01-21 | 2002-01-21 | Rotary non-contact bidrectional synchronous signal and power transmitting system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102624427A (en) * | 2012-03-05 | 2012-08-01 | 浙江大学 | Synchronous transmission system of energy and information |
| CN103368609A (en) * | 2013-06-21 | 2013-10-23 | 浙江大学 | Coupling inductance-based power signal composite transmission system |
| CN105679005A (en) * | 2016-01-18 | 2016-06-15 | 南京航空航天大学 | Rotating apparatus non-contact signal transmission apparatus based on LIFI and infrared light |
| CN105703468A (en) * | 2014-11-26 | 2016-06-22 | 力博特公司 | Uninterruptible power supply (UPS) parallel system, UPSs and synchronization processing method |
| WO2018068340A1 (en) * | 2016-10-10 | 2018-04-19 | 邦彦技术股份有限公司 | Information transmission device and method |
| CN110676945A (en) * | 2019-10-14 | 2020-01-10 | 武汉天腾动力科技有限公司 | Non-contact power supply and data transmission device, motor and electronic equipment |
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2002
- 2002-01-21 CN CNB021125635A patent/CN1195200C/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102624427A (en) * | 2012-03-05 | 2012-08-01 | 浙江大学 | Synchronous transmission system of energy and information |
| CN102624427B (en) * | 2012-03-05 | 2013-12-11 | 浙江大学 | Synchronous transmission system of energy and information |
| CN103368609A (en) * | 2013-06-21 | 2013-10-23 | 浙江大学 | Coupling inductance-based power signal composite transmission system |
| CN105703468A (en) * | 2014-11-26 | 2016-06-22 | 力博特公司 | Uninterruptible power supply (UPS) parallel system, UPSs and synchronization processing method |
| CN105703468B (en) * | 2014-11-26 | 2018-05-29 | 力博特公司 | A kind of uninterruptible power supply UPS parallel systems, UPS and synchronization processing method |
| CN105679005A (en) * | 2016-01-18 | 2016-06-15 | 南京航空航天大学 | Rotating apparatus non-contact signal transmission apparatus based on LIFI and infrared light |
| WO2018068340A1 (en) * | 2016-10-10 | 2018-04-19 | 邦彦技术股份有限公司 | Information transmission device and method |
| CN110676945A (en) * | 2019-10-14 | 2020-01-10 | 武汉天腾动力科技有限公司 | Non-contact power supply and data transmission device, motor and electronic equipment |
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