CN101976864A - Non-contact movable intelligent charging method for electric vehicle and system thereof - Google Patents
Non-contact movable intelligent charging method for electric vehicle and system thereof Download PDFInfo
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- CN101976864A CN101976864A CN201010500748XA CN201010500748A CN101976864A CN 101976864 A CN101976864 A CN 101976864A CN 201010500748X A CN201010500748X A CN 201010500748XA CN 201010500748 A CN201010500748 A CN 201010500748A CN 101976864 A CN101976864 A CN 101976864A
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Abstract
The invention relates to a non-contact movable intelligent charging method for an electric vehicle and a system thereof. The system is characterized by comprising a charging post and a vehicle-mounted charging terminal, and duplexing communication is realized between the charging post and the vehicle-mounted charging terminal by a 2-27MHz shortwave communication mode. The invention has the following beneficial effects that the system can charge electric vehicles in normal running in a non-contact mode so as to finish charging for the electric vehicles in the running process, avoid the limitation that the electric vehicles need to be stopped for charging, indirectly solve the problems of limited endurance capability of rechargeable batteries and longer charging time, effectively solve the problems of charging distance, charging efficiency and the like by calculating and adjusting the transmitting frequency of a magnetic resonance charging circuit in real time, completely realize intellectualization in the charging process, and have practicability and safety as well as efficiency and energy conservation.
Description
Technical field
The present invention relates to a kind of contactless charging method and system thereof, be specifically related to contactless intelligent movable charging method of a kind of electric automobile and system thereof.
Background technology
Electric automobile is as a kind of new traffic tool, has advantages such as zero discharge, energy source be wide, the important means that be considered to alleviate CNPC's resource anxiety, solves the urban atmospheric pollution problem.But at present the Research progress at the aspects such as electric energy supply, conversion and transmission of electric automobile is slow.On the other hand, in June, 2007, the research group of the researcher Marin Soljacic of the Massachusetts Institute of Technology announces that they have used the electromagentic resonance technology, must not use electric wire, just can make one 60 watts bulb luminous every empty transferring electric power.At present some enterprises of Japan have begun to explore electric automobile and have utilized the non-contact charge mode without the electric wire charging such as electromagnetic induction, and in electric automobile and hybrid power bus, existing part vehicle begins to adopt non-contact charge.
Yet, the defective of electric automobile aspect charging is at present: at first, no matter being to use electric wire still is contactless charging, electric automobile still needs to rest in the fixed-site charging, because the flying power finite sum charging interval of rechargeable battery is longer, often needing stops charges for a long time, and this makes that the convenience of electric automobile is still not high, and this also becomes the obstacle that the retardance pure electric automobile is popularized; Secondly, present contactless charging technique effectively send electrical distance limited, if the control of the resonance frequency of magnetic resonance mode can be according to sending the distance of electric portion and power receiving section suitably to control resonance frequency, transmission range will be increased sharply, if and not according to transmission range change resonance frequency, not only limited and sent electrical distance, and efficiency of transmission can reduce rapidly, also exist the electric equipment of sending of infrastructure side to expend problems such as cost in addition, it is more serious that these problems can become in the electric automobile during traveling process.
Summary of the invention
The technical problem that solves
For fear of the deficiencies in the prior art part, the present invention proposes contactless intelligent movable charging method of a kind of electric automobile and system thereof, a kind of intelligent charge management system is provided, for the electric automobile of cruising provides contactless mobile charging, and can in charging process, adjust the tranmitting frequency of magnetic resonance charging circuit, thereby optimize charging process effectively by the positional information calculation of analyzing electric automobile.
Technical scheme
The contactless intelligent movable charging method of a kind of electric automobile is characterized in that step is as follows:
Step 1: electric automobile sends to charging pile with battery information by communication before entering the charging zone, described battery information is battery types, battery size, battery capacity, production firm, charging voltage, charging current, dump energy; Described communication is that 2MHz-27MHz short wave communication mode is carried out duplex communication;
Step 2: when charging pile determines that according to the dump energy that receives needs dash electricity to electric automobile, send the signal that electric automobile prepares to accept electric energy transmitting by communication, and obtaining the positional information of electric automobile according to the framing signal of electric automobile emission, described positional information is: the speed of a motor vehicle, travel route;
Step 3: charging pile makes electric automobile be subjected to the electric required resonance frequency of magnetic resonance by the positional information calculation of electric automobile, and according to the battery information that receives the electric automobile vehicle-mounted charge terminal in advancing is charged;
Step 4: in charging process, charging pile can obtain the state information of vehicle-mounted charge terminal in real time, and according to the tranmitting frequency of positional information adjustment magnetic resonance charging circuit, described state information is the electric weight of position, speed per hour and the charging device of electric automobile;
Step 5: when electric automobile stops charging and sends termination signal when being full of electricity; The electric weight that detects electric automobile when charging pile stops charging when reaching necessary requirement;
Step 6: electric automobile is when leaving the charging zone, and charging pile is closed power supply unit, and sends the complete charge signal to the vehicle-mounted charge terminal; The vehicle-mounted charge terminal is complete charge after receiving this signal.
A kind of system that realizes the contactless intelligent movable charging method of the described electric automobile of claim 1, it is characterized in that comprising charging pile and vehicle-mounted charge terminal, the radio communication of charging pile and vehicle-mounted charge terminal adopts the short wave communication mode of 2MHz-27MHz to carry out duplex communication;
Described charging pile comprises charge control module, running fix processing receiving element, charging pile wireless communication unit and charging pile mixer; Described charge control module comprises charging pile DSP, FREQUENCY CONTROL IC, digital oscillator and power adaptive unit; After the input/output signal that the charging pile mixer is handled two kinds of different frequency ranges of receiving element with charging pile wireless communication unit and running fix closed the road by the charging pile mixer, a shared feeder line received and sends; After the charging pile wireless communication unit received shortwave sky feedback signal, through signal processing output baseband digital signal, baseband digital signal used general purpose I/O port to pass to charging pile DSP; Receiving element is handled in the running fix that charging pile DSP uses general purpose I/O port to transmit control signal and controls charging pile; Charging pile running fix is handled receiving element and is received mixed signal, thereby detecting to isolate 4 road signals and compare with local high speed sequence through power amplification and phase delay produces a time difference, by determining that two groups of time differences calculate the vehicle-mounted charge location information of terminals, this positional information is sent to charging pile DSP by general purpose I/O port; Charging pile DSP calculates and is subjected to electricity to reach the required resonance frequency of magnetic resonance, and this resonance frequency information is passed to FREQUENCY CONTROL IC, and FREQUENCY CONTROL IC regulates the digital oscillator output frequency, finishes power transmission efficiency optimization by the power adaptive unit again; Charging pile DSP passes to the charging pile wireless communication unit to Control Parameter information by general purpose I/O port, the charging pile wireless communication unit carries out Base-Band Processing to information, with baseband signal process power amplifier, and be modulated into high-frequency signal, launch by the antenna feeder of charging pile mixer again;
Described vehicle-mounted charge terminal comprises information gathering control module, running fix transmitter unit, in-vehicle wireless communication unit and vehicle-mounted mixer; Described information gathering control module comprises vehicle-mounted DSP, electronic switch control circuit and information acquisition unit; After vehicle-mounted mixer closed the road with the input/output signal of in-vehicle wireless communication unit and two kinds of different frequency ranges of running fix transmitting element by vehicle-mounted mixer, a shared feeder line received and sends; After the in-vehicle wireless communication unit received shortwave sky feedback signal, through signal processing output baseband digital signal, baseband digital signal passed to information acquisition unit by the CAN bus; Information acquisition unit communicates by CAN bus and vehicle-mounted central processing unit, obtain battery information, battery information is passed to the in-vehicle wireless communication unit by the CAN bus, the in-vehicle wireless communication unit carries out Base-Band Processing to information, baseband signal through power amplifier, is launched by the antenna feeder of vehicle-mounted mixer; Information acquisition unit passes to vehicle-mounted DSP with baseband digital signal by general purpose I/O port, vehicle-mounted DSP handles by analysis, opening electronic switch control circuit when needs charge transmits control signal to the vehicle-mounted charge terminal, when not needing to charge, then close electronic switch control circuit, thereby finish ON/OFF control the vehicle-mounted charge terminal.
Described charging pile wireless communication unit and in-vehicle wireless communication unit are duplex communication, comprise transmitter unit and receiving element, the output of transmitter unit and the input of receiving element connect with antenna by duplexer, and the input of transmitter unit and the output of receiving element connect with DSP by electronic switch; Described transmitter unit be put in Base Band Unit, the low-pass filtering, two, put in two mixing,, a mixing, flat rate are synthetic, promote the circuit and the road of discharging by force; Base Band Unit carries out Base-Band Processing to information, finishes the modulation and demodulation of information; Being linked in sequence by interface circuit then, it is synthetic to put in the low-pass filtering, two, put with the laggard line frequency of a mixing in two mixing,, finish intermediate-freuqncy signal to the conversion the air feedback unit by promoting the circuit and the road of discharging by force then, obtain high frequency amplification and topping power and amplify to such an extent that signal is delivered to antenna through duplexer; Described receiving element is pre-filtering, amplifier 1, a local oscillator, mixing, bandpass filtering 1, amplifier 2, two local oscillators, bandpass filtering 2 and A/D, D/A sampling; Behind the sky feedback signal process pre-filtering of duplexer output and the amplifier 1 high-frequency signal and a local oscillator are simulated frequency conversion; By centre frequency is that the intermediate-freuqncy signal that 140MHz band pass filter 1 obtains is amplified its power through amplifier 2, and then simulate frequency conversion with two local oscillators, with the signal that obtains is the band pass filter 2 of 5.12MHz by centre frequency, resulting signal is again through high-speed a/d, D/A sampling, the signal of sampling is delivered in the DSP unit through electronic switch, change the output baseband signal through odd even sampling separation, quadrature.
A described local frequency is 143.4-168.6MHz.
Described two local frequencies are 145.12MHz.
Described sample rate is 20.48MHz.
Beneficial effect
Contactless intelligent movable charging method of electric automobile and system thereof that the present invention proposes, beneficial effect is as follows: the contactless intelligent movable charging system of electric automobile according to the present invention, it can be the contactless charging of the electric automobile of cruising, make electric motor car can finish charging in the process of moving, avoided the limitation that stopping for charging brought, solved the long problem of flying power finite sum charging interval of rechargeable battery indirectly, and by calculating the tranmitting frequency of adjusting the magnetic resonance charging circuit in real time, efficiently solve problems such as charging distance and charge efficiency, in charging process, all realize intelligent, practical safety, energy-efficient.
Description of drawings
Fig. 1: electric automobile non-contact intelligent movable charging system structural representation;
Fig. 2: radio communication function structural representation;
Fig. 3: mobile positioning function structural representation.
Embodiment
Now in conjunction with the embodiments, accompanying drawing is further described the present invention:
" WiTricity " patented technology that the non-contact power supply module of present embodiment charging pile adopts U.S. WiTricity company to provide, this technology is utilized magnetic resonance, can be with the wireless mode transferring electric power.
Charge control module comprises charging pile DSP, FREQUENCY CONTROL IC, digital oscillator and power adaptive unit:
● charging pile DSP:TMS320C2812 type dsp chip;
● FREQUENCY CONTROL IC: voltage controlled oscillator MVF820, phase-shift discriminator and auxiliary circuit thereof;
● digital oscillator: temperature-compensating crystal oscillator TCXO-L04;
● power adaptive unit: A/D conversion chip ADC0832,89C51 single-chip microcomputer, X9312W digital regulation resistance.
The information gathering control module comprises vehicle-mounted DSP, electronic switch control circuit and information acquisition unit:
● vehicle-mounted DSP:TMS320C2812 type dsp chip;
● electronic switch control circuit: four NAND gate chip periphery circuit AX4011, bidirectional triode thyristor BT134-600E;
● information acquisition unit: photoisolator BS232H9, the ternary bidirectional bus transceiver of 8 road homophases 74LS245.
Vehicle-mounted CPU: TMS320C2812 type dsp chip.
Radio communication: SIN-SWRX2 shortwave wireless transmission/reception machine.
Running fix: radio-frequency (RF) power amplification PA20110, encoder for convolution codes, HP/SH phase place tester, difference frequency sequential sampling combinational circuit, shift register network, high speed counting module A1SD62.
Charging circuit: 5Kw charger CD40017.
Batteries: electric automobile ferric phosphate lithium cell 380V/10AH.
Mixer: the twin-core sheet circuit of forming by MAX3691 and MAX3667.
Toe-in closes the accompanying drawing descriptive system annexation and the course of work:
What Fig. 1 described is electric automobile non-contact intelligent movable charging system structural representation.Non-contact intelligent movable charging system comprises charging pile and vehicle-mounted charge terminal.Charging pile comprises charge control module, running fix processing receiving element, charging pile wireless communication unit and charging pile mixer, and charge control module comprises charging pile DSP, FREQUENCY CONTROL IC, digital oscillator and power adaptive unit again.The vehicle-mounted charge terminal comprises information gathering control module, running fix transmitter unit, in-vehicle wireless communication unit and vehicle-mounted mixer, and the information gathering control module comprises vehicle-mounted DSP, electronic switch control circuit and information acquisition unit again.
Carry out duplex communication by short wave communication mode (2MHz-27MHz) between the wireless communication unit of charging pile and vehicle-mounted charge terminal.After the input/output signal that the charging pile mixer is handled two kinds of different frequency ranges of receiving element with charging pile wireless communication unit and running fix closed the road by the charging pile mixer, a shared feeder line received and sends.After the charging pile wireless communication unit received shortwave sky feedback signal, through signal processing output baseband digital signal, baseband digital signal used general purpose I/O port to pass to charging pile DSP.Receiving element is handled in the running fix that charging pile DSP uses general purpose I/O port to transmit control signal and controls charging pile.Charging pile running fix is handled receiving element and is received mixed signal, thereby detecting to isolate 4 road signals and compare with local high speed sequence through power amplification and phase delay produces a time difference, by determining that two groups of time differences calculate the vehicle-mounted charge location information of terminals, positional information comprises the speed of a motor vehicle, travel route, at last this positional information is sent to charging pile DSP by general purpose I/O port.Charging pile DSP makes by the positional information calculation of analyzing electric automobile and is subjected to electricity side to reach the required resonance frequency of magnetic resonance, and this resonance frequency information passed to FREQUENCY CONTROL IC, FREQUENCY CONTROL IC regulates the digital oscillator output frequency, finishes power transmission efficiency optimization by the power adaptive unit again.Charging pile DSP passes to the charging pile wireless communication unit to Control Parameter information by general purpose I/O port, the charging pile wireless communication unit carries out Base-Band Processing to information, with baseband signal process power amplifier, and be modulated into high-frequency signal, launch by the antenna feeder of charging pile mixer again.
After vehicle-mounted mixer closed the road with the input/output signal of in-vehicle wireless communication unit and two kinds of different frequency ranges of running fix transmitting element by vehicle-mounted mixer, a shared feeder line received and sends.After the in-vehicle wireless communication unit received shortwave sky feedback signal, through signal processing output baseband digital signal, baseband digital signal passed to information acquisition unit by the CAN bus.Information acquisition unit communicates by CAN bus and vehicle-mounted central processing unit, obtains battery information, and battery information comprises battery types, battery size, battery capacity, production firm, charging voltage, charging current, dump energy.Information acquisition unit passes to the in-vehicle wireless communication unit with battery information by the CAN bus then, and the in-vehicle wireless communication unit carries out Base-Band Processing to information, and baseband signal through power amplifier, is launched by the antenna feeder of vehicle-mounted mixer.Information acquisition unit passes to vehicle-mounted DSP with baseband digital signal by general purpose I/O port, vehicle-mounted DSP handles by analysis, opening electronic switch control circuit when needs charge transmits control signal to the vehicle-mounted charge terminal, when not needing to charge, then close electronic switch control circuit, thereby finish ON/OFF control the vehicle-mounted charge terminal.
Fig. 2 is the radio communication function structural representation.Wireless communication unit is duplex communication, comprises transmitter unit and receiving element.Transmitter unit: transmitter unit is divided into Base Band Unit, intermediate frequency unit, radio frequency amplifying unit.Base Band Unit carries out Base-Band Processing to information, comprises the generation of baseband signal and reverts to raw information by base-band information, promptly finishes the function of modulation, demodulation.Base Band Unit comprises A/D, D/A conversion, analog filtering, is connected to intermediate frequency unit by interface circuit then; Intermediate frequency unit is modulated to intermediate frequency with the base band frequency that receives, and finishes base band and intermediate frequency is directly changed, comprise in the low-pass filtering, two put, put in two mixing,, a mixing and frequency synthesis.Radio frequency amplifying circuit is finished intermediate-freuqncy signal to the conversion between the air feedback unit, comprises that high frequency amplifies, topping power amplifies, and this function is finished by promoting circuit and put by force.Base Band Unit through after the low-pass filtering, carries out baseband signal to put in two then, after the frequency with the 145.12MHz frequency synthesis is carried out two mixing, carries out a mixing through putting in one with the 143.4-168.6MHz frequency more again, obtains higher IF-FRE.Through promoting circuit and putting the generation that power amplification and power output are finished in preceding road by force, launch by antenna feeder at last then.
Receiving element: receiving element is divided into radio-frequency front-end and if sampling unit.Radio-frequency front-end is responsible for receiving the sky feedback signal of air feedback unit, comprises pre-filtering and amplifier 1.Base band frequency is responsible for modulating the signal in the if sampling unit, comprises a local oscillator, mixing, bandpass filtering 1, amplifier 2, two local oscillators, bandpass filtering 2, A/D, D/A sampling.Receiving element is after the radiofrequency signal that receives 2-27MHz, and through pre-filtering, amplifier 1 is simulated frequency conversion with a high-frequency signal and a local oscillator (143.4-168.6MHz) then; By centre frequency is that the intermediate-freuqncy signal that 140MHz band pass filter 1 obtains is amplified its power through amplifier 2, and then simulate frequency conversion with two local oscillators (145.12MHz), with the signal that obtains is the band pass filter 2 of 5.12MHz by centre frequency, through high-speed a/d, D/A sampling, sample rate is 20.48MHz to resulting signal again.The signal of sampling is delivered in the DSP unit and is changed the output baseband signal through odd even sampling separation, quadrature.
Fig. 3 mobile positioning function structural representation.The running fix transmitter unit of vehicle-mounted charge terminal comprises that DSP, high speed pseudo-code generation unit, sequential sampling unit, signal send processing unit and power amplifier.The running fix of charging pile is handled receiving element and is comprised power amplifier, signal processing unit, multiplication unit, phase delay testing circuit and DSP.
The DSP unit is delivered to one group of normal flow DS-SS signal in the high speed pseudo-code generation unit, and producing a group length is N, and pseudo-bit rate is the spread-spectrum pseudo code sequence of 1/Tcbps.The effect of high-frequency counter is to adopt the unit that the high-speed sampling frequency is provided for order.Two-forty PN sign indicating number produces the sequence of 4 groups of low rates after the sequential sampling unit is by sequential sampling; The sequence of every group of low rate multiplies each other to finish through multiplier with cos2 π ft1,2,3,4 respectively and shifts to and be modulated into mutually orthogonal subcarrier.Promptly transmitted through adder again, then this is transmitted, send in the air feedback unit and go through power amplifier.
Receiver is with the mixed information process power amplification earlier that receives, isolate 4 way carrier waves by coherent detection then, after each way carrier wave multiplies each other with cos2 π ft1,2,3,4 respectively through the outer impurity of band pass filter elimination band, generate one group of identical high speed sequence that a fixing and known time migration is arranged but then 4 way carrier multiplication are reconfigured together, determine this time difference by the phase delay testing circuit with former sequence.The DSP unit is by relatively two groups of time differences are finished location work.
Claims (6)
1. contactless intelligent movable charging method of electric automobile is characterized in that step is as follows:
Step 1: electric automobile sends to charging pile with battery information by communication before entering the charging zone, described battery information is battery types, battery size, battery capacity, production firm, charging voltage, charging current, dump energy; Described communication is that 2MHz-27MHz short wave communication mode is carried out duplex communication;
Step 2: when charging pile determines that according to the dump energy that receives needs dash electricity to electric automobile, send the signal that electric automobile prepares to accept electric energy transmitting by communication, and obtaining the positional information of electric automobile according to the framing signal of electric automobile emission, described positional information is: the speed of a motor vehicle, travel route;
Step 3: charging pile makes electric automobile be subjected to the electric required resonance frequency of magnetic resonance by the positional information calculation of electric automobile, and according to the battery information that receives the electric automobile vehicle-mounted charge terminal in advancing is charged;
Step 4: in charging process, charging pile can obtain the state information of vehicle-mounted charge terminal in real time, and according to the tranmitting frequency of positional information adjustment magnetic resonance charging circuit, described state information is the electric weight of position, speed per hour and the charging device of electric automobile;
Step 5: when electric automobile stops charging and sends termination signal when being full of electricity; The electric weight that detects electric automobile when charging pile stops charging when reaching necessary requirement;
Step 6: electric automobile is when leaving the charging zone, and charging pile is closed power supply unit, and sends the complete charge signal to the vehicle-mounted charge terminal; The vehicle-mounted charge terminal is complete charge after receiving this signal.
2. system that realizes the contactless intelligent movable charging method of the described electric automobile of claim 1, it is characterized in that comprising charging pile and vehicle-mounted charge terminal, the radio communication of charging pile and vehicle-mounted charge terminal adopts the short wave communication mode of 2MHz-27MHz to carry out duplex communication;
Described charging pile comprises charge control module, running fix processing receiving element, charging pile wireless communication unit and charging pile mixer; Described charge control module comprises charging pile DSP, FREQUENCY CONTROL IC, digital oscillator and power adaptive unit; After the input/output signal that the charging pile mixer is handled two kinds of different frequency ranges of receiving element with charging pile wireless communication unit and running fix closed the road by the charging pile mixer, a shared feeder line received and sends; After the charging pile wireless communication unit received shortwave sky feedback signal, through signal processing output baseband digital signal, baseband digital signal used general purpose I/O port to pass to charging pile DSP; Receiving element is handled in the running fix that charging pile DSP uses general purpose I/O port to transmit control signal and controls charging pile; Charging pile running fix is handled receiving element and is received mixed signal, thereby detecting to isolate 4 road signals and compare with local high speed sequence through power amplification and phase delay produces a time difference, by determining that two groups of time differences calculate the vehicle-mounted charge location information of terminals, this positional information is sent to charging pile DSP by general purpose I/O port; Charging pile DSP calculates and is subjected to electricity to reach the required resonance frequency of magnetic resonance, and this resonance frequency information is passed to FREQUENCY CONTROL IC, and FREQUENCY CONTROL IC regulates the digital oscillator output frequency, finishes power transmission efficiency optimization by the power adaptive unit again; Charging pile DSP passes to the charging pile wireless communication unit to Control Parameter information by general purpose I/O port, the charging pile wireless communication unit carries out Base-Band Processing to information, with baseband signal process power amplifier, and be modulated into high-frequency signal, launch by the antenna feeder of charging pile mixer again;
Described vehicle-mounted charge terminal comprises information gathering control module, running fix transmitter unit, in-vehicle wireless communication unit and vehicle-mounted mixer; Described information gathering control module comprises vehicle-mounted DSP, electronic switch control circuit and information acquisition unit; After vehicle-mounted mixer closed the road with the input/output signal of in-vehicle wireless communication unit and two kinds of different frequency ranges of running fix transmitting element by vehicle-mounted mixer, a shared feeder line received and sends; After the in-vehicle wireless communication unit received shortwave sky feedback signal, through signal processing output baseband digital signal, baseband digital signal passed to information acquisition unit by the CAN bus; Information acquisition unit communicates by CAN bus and vehicle-mounted central processing unit, obtain battery information, battery information is passed to the in-vehicle wireless communication unit by the CAN bus, the in-vehicle wireless communication unit carries out Base-Band Processing to information, baseband signal through power amplifier, is launched by the antenna feeder of vehicle-mounted mixer; Information acquisition unit passes to vehicle-mounted DSP with baseband digital signal by general purpose I/O port, vehicle-mounted DSP handles by analysis, opening electronic switch control circuit when needs charge transmits control signal to the vehicle-mounted charge terminal, when not needing to charge, then close electronic switch control circuit, thereby finish ON/OFF control the vehicle-mounted charge terminal.
3. the system of the contactless intelligent movable charging method of electric automobile according to claim 2, it is characterized in that: described charging pile wireless communication unit and in-vehicle wireless communication unit are duplex communication, comprise transmitter unit and receiving element, the output of transmitter unit and the input of receiving element connect with antenna by duplexer, and the input of transmitter unit and the output of receiving element connect with DSP by electronic switch; Described transmitter unit be put in Base Band Unit, the low-pass filtering, two, put in two mixing,, a mixing, flat rate are synthetic, promote the circuit and the road of discharging by force; Base Band Unit carries out Base-Band Processing to information, finishes the modulation and demodulation of information; Being linked in sequence by interface circuit then, it is synthetic to put in the low-pass filtering, two, put with the laggard line frequency of a mixing in two mixing,, finish intermediate-freuqncy signal to the conversion the air feedback unit by promoting the circuit and the road of discharging by force then, obtain high frequency amplification and topping power and amplify to such an extent that signal is delivered to antenna through duplexer; Described receiving element is pre-filtering, amplifier 1, a local oscillator, mixing, bandpass filtering 1, amplifier 2, two local oscillators, bandpass filtering 2 and A/D, D/A sampling; Behind the sky feedback signal process pre-filtering of duplexer output and the amplifier 1 high-frequency signal and a local oscillator are simulated frequency conversion; By centre frequency is that the intermediate-freuqncy signal that 140MHz band pass filter 1 obtains is amplified its power through amplifier 2, and then simulate frequency conversion with two local oscillators, with the signal that obtains is the band pass filter 2 of 5.12MHz by centre frequency, resulting signal is again through high-speed a/d, D/A sampling, the signal of sampling is delivered in the DSP unit through electronic switch, change the output baseband signal through odd even sampling separation, quadrature.
4. the system of the contactless intelligent movable charging method of electric automobile according to claim 3 is characterized in that: a described local frequency is 143.4-168.6MHz.
5. the system of the contactless intelligent movable charging method of electric automobile according to claim 3 is characterized in that: described two local frequencies are 145.12MHz.
6. the system of the contactless intelligent movable charging method of electric automobile according to claim 3 is characterized in that: described sample rate is 20.48MHz.
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| CN102324177B (en) * | 2011-08-25 | 2013-06-19 | 广州飞瑞敖电子科技有限公司 | Electric car charging pile data acquisition system based on WiFi radio over fiber technology |
| CN103187765A (en) * | 2011-12-31 | 2013-07-03 | 比亚迪股份有限公司 | Electric automobile and alternating current charging communication method thereof and charging pile |
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