CN106787250A - A kind of electric assisted bicycle pedal power signal detection modulation circuit and method - Google Patents
A kind of electric assisted bicycle pedal power signal detection modulation circuit and method Download PDFInfo
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- CN106787250A CN106787250A CN201710104516.4A CN201710104516A CN106787250A CN 106787250 A CN106787250 A CN 106787250A CN 201710104516 A CN201710104516 A CN 201710104516A CN 106787250 A CN106787250 A CN 106787250A
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
- B62M6/00—Rider propulsion of wheeled vehicles with additional source of power, e.g. combustion engine or electric motor
- B62M6/40—Rider propelled cycles with auxiliary electric motor
- B62M6/45—Control or actuating devices therefor
- B62M6/50—Control or actuating devices therefor characterised by detectors or sensors, or arrangement thereof
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
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Abstract
The invention discloses a kind of electric assisted bicycle pedal power signal detection modulation circuit and method, for detecting that external signal passes to control system, or the command signal that control system is sent passes to execution unit, including：One speed/direction sensor module, for picking rate and direction signal；One speed detecting component, for detection speed data；One rotation circuit module, gathers external signal；One stationary circuitry module, couples the rotation circuit module, can provide electric energy to rotation circuit；Realize two circuits completely isolated, while wireless power is realized, therefore when the crank shaft of electric assisted bicycle is in rotary work, in the absence of contact and friction；Two circuits realize the transmission of energy and the transmission of multiple signals by the coupling and modulation of two coils with detector circuit.
Description
Technical field
The present invention relates to circuit design technique, more particularly to a kind of electric assisted bicycle pedal power signal detection modulation
Circuit and method.
Background technology
The power supply of traditional electric assisted bicycle signal acquisition mould and signal transmission are all to utilize wired power supply mode,
So cause electric assisted bicycle connecting line it is more numerous and diverse, be unfavorable for it is hidden, and easily occur contact it is unreliable and easy
The defect of damage, is unfavorable for the small light development of electric assisted bicycle.In addition, contact power supply mode, works as crank shaft
During rotary work, there is contact with friction.
The content of the invention
Goal of the invention：To solve the deficiencies in the prior art, there is provided one kind can be with wireless power, while being passed using power supply signal
Pass multichannel data, and using modulating pulsewidth highly, pulsewidth width and pulse duration frequency come recognize unlike signal it is electric boosted voluntarily
Car pedal power signal detection modulation circuit and method.
Technical scheme：A kind of electric assisted bicycle pedal power signal detection modulation circuit, for detecting that external signal is passed
Control system is passed, or the command signal that control system is sent passes to execution unit, the circuit includes：One speed/direction
Sensor assembly, for picking rate and direction signal；One speed detecting component, for detection speed data；One rotation circuit
Module, gathers external signal；One stationary circuitry module, couples the rotation circuit module, can provide electric energy to rotation circuit.
And, the stationary circuitry module can also mutually transmit multiple signals with rotation circuit module.
In addition, the stationary circuitry module includes：One dc source, for each loop of stationary circuitry module provides direct current
Electricity；One clock signal generating loop, is powered by dc source, the input in one power amplification loop of output termination；The power
Amplifying return circuit, is powered by dc source, output one induction coil L1 of termination, and the electric capacity C1 of another termination one of induction coil L1 is just
Pole, the negative pole ground connection of electric capacity C1；One signal demodulator loop, is powered by dc source, and input is connected to induction coil L1 with electricity
Hold the contact of C1, the input in one LPF loop of output termination；The LPF loop, is powered by dc source, defeated
Go out the input of one signal shaping amplifying return circuit of termination；The signal shaping amplifying return circuit, is powered by dc source, and output end connects
Meet MCU.
And, the power amplification loop includes triode, and the signal demodulator loop includes diode.
In addition, the rotation circuit module includes：One induction coil L3, couples with the induction coil L1；One power is humorous
Shake loop, in parallel with induction coil L3, and the electromagnetic wave energy that the induction coil L2 that induction coil L3 is received sends out is most
Bigization；One commutating circuit, the output end in input termination power resonance loop, the input of output one unidirectional circuit of termination is described
The input of output one filter circuit of termination of unidirectional circuit, the output of the filter circuit terminates a loop of voltage regulation, and voltage stabilizing is returned
Road is strain signal acquisition circuit, strain signal amplifying return circuit and voltage conversion frequency loop provide supply voltage；The strain letter
Number acquisition circuit collection external signal, output end scoops out the input of varying signal amplifying return circuit, the strain signal amplifying circuit
Output termination voltage conversion frequency loop input, the output termination signal modulation output loop in the voltage conversion frequency loop
Input, the other end connection of another termination load resistance R1 of the signal modulation output loop, load resistance R1 is described
The contact of commutating circuit and unidirectional circuit.
And, the commutating circuit is single-phase half-wave rectifier circuit；The signal modulation output loop includes triode T1,
The base stage that the output end in the voltage conversion frequency loop passes through a resistance R2 connecting triodes T1, the colelctor electrode of triode T1 connects negative
Carry resistance R1, the grounded emitter of triode T1；
In addition, the external signal is the faint change of the resistance strain sensor caused by the moment variations of rotary shaft；
The strain signal acquisition circuit gathers the faint change of the resistance strain sensor, and exports the first strain signal；It is described
Strain signal amplifying return circuit amplifies the first strain signal according to setting ratio, and exports the second strain signal；The voltage turns
It is defeated that second strain signal is converted into square-wave signal with the second strain signal linearly by frequency loop according to setting ratio
Go out；The square-wave signal controls the conducting of resistance R1 by the on-off action of triode T1, drags down the output of the commutating circuit
Voltage, causes load down；Load down causes the curent change of commutating circuit, power resonance loop and induction coil L3, makes
Produce couple current in induction coil L1, and then cause the output power of dc source by electric capacity C1 and power amplification loop
Change, realize the transmission of modulated signal.
And, the voltage waveform at electric capacity C1 two ends is modulated into data envelopment form.
In addition, after the data envelopment is by the signal demodulator loop commutation detection, by the output of LPF loop with
Modulated signal Complete Synchronization change faint change, then by signal shaping amplifying return circuit process be reduced into modulated signal export to
MCU。
In a further embodiment, there is provided following solution：A kind of electric assisted bicycle pedal power signal detection
Modulation circuit, including：Stationary circuitry module and rotation circuit module；
Stationary circuitry module：The stationary circuitry module includes dc source, and clock signal generating loop, power amplification is returned
Road, signal demodulator loop, LPF loop, signal shaping amplifying return circuit, the first induction coil L1 and electric capacity C1；
Wherein, dc source connects clock signal generating loop, power amplification loop, signal demodulator loop, low pass respectively
The power end of filter circuit and signal shaping amplifying return circuit；
The input in the output end connection power amplification loop of clock signal generating loop, the output end in power amplification loop
Connect one end of the first induction coil L1, the positive pole of the other end connection electric capacity C1 of the first induction coil L1, the negative pole of electric capacity C1
Ground connection；
The input in signal demodulator loop is connected to the contact of the first induction coil L1 and electric capacity C1, output end connection low pass
The input of filter circuit, the output end in LPF loop connects the input of signal shaping amplifying return circuit, and signal shaping is put
The output end in big loop is connected to MCU；
Rotation circuit module：The rotation circuit module include the second induction coil L3, power resonance loop, commutating circuit,
Unidirectional circuit, filter circuit, loop of voltage regulation, strain signal acquisition circuit, strain signal amplifying return circuit, voltage conversion frequency loop,
Signal modulation output loop, first resistor R1 and base resistance；The signal modulation output loop includes triode T1；
Wherein, the second induction coil L3 is connected in parallel with power resonance loop, and the output end connection in power resonance loop is whole
The input on road is flowed back to, the output end of commutating circuit connects the input of unidirectional circuit, the output end connection filtering of unidirectional circuit
The input in loop, the output end of filter circuit connects the input of loop of voltage regulation, and the output end of loop of voltage regulation is connected respectively should
The power end in varying signal acquisition circuit, strain signal amplifying return circuit and voltage conversion frequency loop；
The output end of strain signal acquisition circuit connects the input of strain signal amplifying return circuit, strain signal amplifying return circuit
Output end connection voltage conversion frequency loop input, the output end in voltage conversion frequency loop connects one end of base resistance,
The base stage of the other end connecting triode T1 of base resistance, the grounded emitter of triode T1, the colelctor electrode connection of triode T1
One end of first resistor R1, the other end connection commutating circuit of first resistor R1 and the contact of unidirectional circuit；
Second induction coil L3 couplings of the first induction coil L1 of the stationary circuitry module and the rotation circuit module
Connect.The triode T1 is NPN type triode.
A kind of signal detection modulator approach based on foregoing circuit, the stationary circuitry module passes through the first induction coil L1
The rotation circuit module that is coupled as with the second induction coil L3 provides electric energy；
The clock signal that the clock signal generating loop of the stationary circuitry module is produced, amplifies defeated through power amplification loop
Go out power signal, the power signal after amplification produces sense by causing the first induction coil after the first induction coil L1 and electric capacity C
Magnetic field is answered, while electric capacity C1 stored electric energies；
Second induction coil L3 of the rotation circuit module is in the induced field that the first induction coil L1 is produced
Rotation, the second induction coil L3 two ends produce induced electromotive force, and produce sensing alternating current, and sensing alternating current is through overpower
Resonant tank maximizes electric energy, then input rectifying loop, and alternating current is converted into pulse direct current and defeated by commutating circuit
Go out；
The pulse direct current of commutating circuit output is input to filter circuit through unidirectional circuit all the way, and filter circuit is straight by pulse
Stream electricity is filtered and energy storage, filtered DC supply input loop of voltage regulation, the high stability and low ripple of loop of voltage regulation output
The working power of change is separately input to strain signal acquisition circuit, strain signal amplifying return circuit, voltage conversion frequency loop and letter
Number modulation output loop power end.
Preferably, the rotation circuit module will be modulated by the coupling of the second induction coil L3 and the first induction coil L1
Signal and energy signal pass to stationary circuitry module；
The strain signal acquisition circuit gathers strain signal, and strain signal is exported gives strain signal amplifying return circuit,
Strain signal amplifying return circuit is amplified strain signal by predetermined ratio, and the strain signal after amplification is exported to voltage conversion frequency
Strain signal after amplification is converted into the side with strain signal linearly by predetermined ratio in loop, voltage conversion frequency loop
Ripple signal arrives the base stage of triode T1 through base resistance output, and the emitter stage connection of triode T1 is digitally；
When the high level of square-wave signal is input to the base stage of triode T1, triode T1 is off state, colelctor electrode
First resistor R1 is not turned on；
When the low level of square-wave signal is input to the base stage of triode T1, triode T1 conductings, colelctor electrode first resistor
R1 is turned on, and has dragged down the output voltage of commutating circuit, and load down causes commutating circuit, power resonance loop and the second sensing
Electric current in coil L3 changes, that is, export modulated signal；The electric current changed in the second induction coil L3 causes first
Curent change in induction coil L1, electric capacity C1 both end voltages change, so as to cause curent change in power amplification loop, most
The output power of dc source is caused to change eventually；Meanwhile,
The change control source at electric capacity C1 two ends is to signal demodulator loop, the change voltage that signal demodulator loop will receive
After carrying out rectification, export and give LPF loop, LPF loop will obtain and modulation after HFS filtering process
The signal of signal Complete Synchronization change, and export and give signal shaping amplifying return circuit, signal shaping amplifying return circuit is to the letter that receives
Number carry out shaping and enhanced processing is reduced into modulated signal, and export and give control system MCU.
Beneficial effect：Stationary circuitry module and rotation circuit module are intercoupled by two coils and realize two circuits
It is completely isolated, while realizing stationary circuitry module to rotation circuit module wireless power, therefore when axle is in rotary work, do not deposit
Contacting and rubbing；In addition, the strain signal of strain signal acquisition circuit collection is by a series of changes, using two coils it
Between coupling, finally modulated signal is mutually transmitted in the form of disturbing electric energy, realize many of stationary circuitry and rotation circuit
The transmission of circuit-switched data signal；Using modulating pulsewidth highly, pulsewidth width and pulse duration frequency recognize different signals；Furthermore, profit
While realizing energy transmission with modulator loop and detector circuit, two communications of circuit are realized, in addition, can be by the power on axle
Square signal, rate signal, direction signal is passed out, and control system is according to actual conditions or setting value to electric assisted bicycle
The power of power-assisted is distributed, impression of smoothly riding is realized.
Brief description of the drawings
Fig. 1 is the circuit diagram of stationary circuitry plate PCBA_A.
Fig. 2 is the circuit diagram of rotation circuit plate PCBA_B.
Fig. 3 is the working timing figure of stationary circuitry and rotation circuit.
Specific embodiment
Describe embodiments of the present invention in detail below in conjunction with the accompanying drawings.
As shown in figure 1, speed/direction sensor module 1 gathers the rate signal and direction signal of electric assisted bicycle,
And pass to control system and processed；Stationary circuitry module 2 includes dc source, and dc source occurs back to clock signal
Road, power amplification loop, signal demodulator loop, LPF loop and signal shaping amplifying return circuit provide the power supply electricity of stabilization
Pressure；The input in the output end connection power amplification loop of clock signal generating loop, output end and the sense in power amplification loop
Coil L1 is answered to connect, the other end of induction coil L1 is connected with the positive pole of electric capacity C1, the negative pole ground connection of electric capacity C1；Signal demodulator is returned
The contact of the input connection induction coil L1 and electric capacity C1 on road, output end is connected with the input in LPF loop, low pass
The output end of filter circuit is connected with the input of signal shaping amplifying return circuit, the output end connection control of signal shaping amplifying return circuit
System MCU processed.
Power amplification loop is a single tube total radio amplifier, and in circuit, NPN type triode plays amplification, is work(
The core component of rate amplifying return circuit；Dc source provides direct current for colelctor electrode, and for input signal provides energy, triode is main
It is the change that the change of electric current is converted to voltage, is then delivered to the output end of amplifying circuit；Preset as needed each
Individual parameter value sets multiplication factor.
Signal demodulator loop includes detector diode, and in detecting circuit, amplitude-modulated signal is added to the positive pole of detector diode,
Detector diode is turned on using the amplitude of signal, positive half-cycle signal makes diode current flow, negative half-cycle signal end diode；
I.e. detector diode removes the latter half in FM signal, leaves the high-frequency carrier signal of coenvelope signal top half.
LPF loop is a RC active low-pass filters, the signal filtering treatment that it will be above cut-off frequency, will be low
In the signal output of cut-off frequency；That is signal by behind LPF loop, allowing and passing through less than the signal of a certain CF, and
Undesirable semaphore is filtered, the effect of filtering " noise " is reached.Cut-off frequency is according to can be by setting the need for difference
Determine the parameters value of RC wave filters to preset.
Signal shaping amplifying return circuit includes operational amplifier, and it is the core component of signal shaping amplifying return circuit, can be by
The input signal of minor variations amplifies multiple very high, exports the signal waveform for needing.
As shown in Fig. 2 rotation circuit module 3 include induction coil L3, the power resonance loop in parallel with induction coil L3,
The output end in power resonance loop connects the input of commutating circuit, and the output end of commutating circuit connects the input of unidirectional circuit,
The input of the output termination filter circuit of unidirectional circuit, the input of the output termination loop of voltage regulation of filter circuit, voltage stabilizing is returned
Strain signal acquisition circuit is given on road, and strain signal amplifying return circuit and voltage conversion frequency loop provide the voltage of stabilization；Strain signal
The signal output for gathering turns to the output end connection voltage of strain signal amplifying return circuit, strain signal amplifying return circuit by acquisition circuit
The input of frequency loop, the output end in voltage conversion frequency loop connects the base stage of triode T1 by resistance R2, triode T1's
Colelctor electrode connects the contact of commutating circuit and unidirectional circuit by resistance R1, and the emitter stage of triode T1 connects digitally.
Power resonance loop includes electric capacity C3, and Main Function is the frequency that selection needs.
Commutating circuit can be single-phase half-wave rectifier circuit, carry out rectification using the one-way conduction characteristic of diode, i.e.,
The half cycle of signal is removed, is left the another half cycle of signal, effect is that alternating current is converted into direct current.
Unidirectional circuit includes diode, using the one-way conduction characteristic of diode, realizes the stability that subsequent conditioning circuit is powered.
Strain signal acquisition circuit includes strain gauge transducer, and the change of set is turned round on the crank shaft for gathering electric assisted bicycle
Change, be changed into electric signal output.
The signal that strain signal amplifying return circuit will be received is enlarged into the multiple of setting.
The voltage signal that voltage conversion frequency loop will receive is converted to frequency square wave signal output.
Operation principle：
1. clock signal produces loop to produce clock signal to pass through L1 and C1 after amplifying power output through power amplification loop
It is sent out energy.
2.L3 receives the electromagnetic wave that L2 sends out and makes to receive energy by power resonance tank capacitance C3 maximum
Change.
3. the alternating current that commutating circuit will be received is converted into pulse direct current and is divided into 2 tunnels；
3-1. is put after leading up to unidirectional circuit-filter circuit-loop of voltage regulation to strain signal acquisition circuit-strain signal
Big loop-voltage conversion frequency loop-signal modulation output loop provides electric energy.
3-2. separately leads up to the continuous on-off actions of T1-R1, and causes rotor portion load down and play and drag down rectification
The purpose of output voltage loop.
4. unidirectional circuit plays the acute variation of output voltage after the commutating circuit that causes when isolation T1R1 is opened, allow behind
Signal processing is powered more steady.
5. filter circuit plays a part of filtering and energy storage, and loop of voltage regulation is put for strain signal acquisition circuit-strain signal
Big loop-voltage conversion frequency loop-signal modulation output loop provides the working power of high stability and low ripple change
6. strain signal acquisition circuit is collected after torsion set change causes the faint change of strain transducer and passes strain signal
Strain signal amplifying return circuit is passed to amplify by fixed proportion.
7. the strain signal after being exaggerated is converted into and strain signal into line by a certain percentage by voltage conversion frequency loop
The square wave output of sex ratio is gone.
8. frequency signal controls the conducting of R1 by T1 on-off actions after changing, and to play and export electricity after dragging down commutating circuit
Pressure, so as to cause the purpose of load down.
9. it is pulled low the load down for causing and acts through commutating circuit-power resonance loop C3-L3-L1-C1- power and puts
Big loop to DC power supply, so as to the output power for causing dc source changes.The change that load down causes is straight
It is reversed to be changed in stationary part electric current, output power and L1, C1 two ends transmission wave-shape amplitude；In the output of L1, C1 two ends
Waveform produces data envelopment form.
10. C1 two ends are changed into voltage by passing through LPF loop after signal demodulator loop commutation detection by radio-frequency head
The faint change changed with modulated signal Complete Synchronization is obtained after point filtering process.
The 11. faint changes that will obtain changing with modulated signal Complete Synchronization after filtering process are sent to signal shaping and amplify back
Road treatment is reduced into modulated signal output.
As shown in figure 3, being stationary circuitry and the working timing figure of rotation circuit；Modulated signal is a square-wave signal, electric capacity
The waveform at C1 two ends is modulated into data envelopment；Data envelopment is by being demodulated to upper half envelope signal behind signal demodulator loop；
LPF loop output waveform is the square-wave signal of the faint change changed with modulated signal Complete Synchronization；Signal shaping is amplified
Loop exports wave direction.
When electric assisted bicycle is ridden, crank shaft is that, in rotation status, torque (being commonly called as turning round set) signal is just just at this
On the axle of rotation, the strain transducer in strain signal acquisition circuit gathers the torque signals in rotary shaft on the axle, and
Torque signals (turning round set change) on detection axle need electric energy, therefore, metal shaft is added using two coils, form one and be similar to
Transformer device structure；By intercoupling for two coils, realize stationary circuitry module and give rotation circuit module wireless power, together
When to realize two circuits completely isolated；Therefore when crank shaft is in rotary work, in the absence of contact and friction.
In addition, the torque signals of strain signal acquisition circuit collection need to send control system to, control system is according to power
Square signal, the rate signal of and speed/direction sensor collection and direction recognize riding condition, and refer to crank shaft transmission
Make signal；So, using the coupling between two coils, after modulating signals into, mutually transmitted in the form of disturbing electric energy, two
Coil is equipped with relative detection and decoding circuit again, while energy is transmitted, realizes two communications of circuit.
In another embodiment, there is provided a kind of signal detection modulator approach, the signal detecting method is based on a kind of electronic help
Force bike pedal power signal detection modulation circuit realizes that the signal deteching circuit includes：Stationary circuitry module and rotation circuit
Module；
Stationary circuitry module：The stationary circuitry module includes dc source, and clock signal generating loop, power amplification is returned
Road, signal demodulator loop, LPF loop, signal shaping amplifying return circuit, the first induction coil L1 and electric capacity C1；Wherein, directly
Stream power supply connects clock signal generating loop respectively, and power amplification loop, signal demodulator loop, LPF loop and signal are whole
The power end of shape amplifying return circuit；The input in the output end connection power amplification loop of clock signal generating loop, power amplification
The output end in loop connects one end of the first induction coil L1, and the other end of the first induction coil L1 connects the positive pole of electric capacity C1,
The negative pole ground connection of electric capacity C1；The input in signal demodulator loop is connected to the contact of the first induction coil L1 and electric capacity C1, output
The input in end connection LPF loop, the output end in LPF loop connects the input of signal shaping amplifying return circuit,
The output end of signal shaping amplifying return circuit is connected to MCU；
Rotation circuit module：The rotation circuit module include the second induction coil L3, power resonance loop, commutating circuit,
Unidirectional circuit, filter circuit, loop of voltage regulation, strain signal acquisition circuit, strain signal amplifying return circuit, voltage conversion frequency loop,
Signal modulation output loop, first resistor R1 and base resistance；The signal modulation output loop includes triode T1；Wherein,
Second induction coil L3 is connected in parallel with power resonance loop, and the output end in power resonance loop connects the input of commutating circuit
End, the output end of commutating circuit connects the input of unidirectional circuit, and the output end of unidirectional circuit connects the input of filter circuit,
The output end of filter circuit connects the input of loop of voltage regulation, and the output end of loop of voltage regulation connects strain signal and gathers back respectively
The power end in road, strain signal amplifying return circuit and voltage conversion frequency loop；The output end connection strain of strain signal acquisition circuit
The input of signal amplifying return circuit, the input in the output end connection voltage conversion frequency loop of strain signal amplifying return circuit, voltage
The output end for turning frequency loop connects one end of base resistance, the base stage of the other end connecting triode T1 of base resistance, three poles
The grounded emitter of pipe T1, one end of the colelctor electrode connection first resistor R1 of triode T1, the other end connection of first resistor R1
The contact of commutating circuit and unidirectional circuit；First induction coil L1 of the stationary circuitry module and the rotation circuit module
Second induction coil L3 is coupled；
Above-mentioned signal detecting method is：
Stationary circuitry module is carried by the rotation circuit module that is coupled as of the first induction coil L1 and the second induction coil L3
Power supply energy；The clock signal that the clock signal generating loop of the stationary circuitry module is produced, amplifies defeated through power amplification loop
Go out power signal, the power signal after amplification produces sense by causing the first induction coil after the first induction coil L1 and electric capacity C
Magnetic field is answered, while electric capacity C1 stored electric energies；
Second induction coil L3 of the rotation circuit module is in the induced field that the first induction coil L1 is produced
Rotation, the second induction coil L3 two ends produce induced electromotive force, and produce sensing alternating current, and sensing alternating current is through overpower
Resonant tank maximizes electric energy, then input rectifying loop, and alternating current is converted into pulse direct current and defeated by commutating circuit
Go out；The pulse direct current of commutating circuit output is input to filter circuit through unidirectional circuit all the way, and filter circuit is by pulse direct current
It is filtered and energy storage, filtered DC supply input loop of voltage regulation, the high stability and low ripple of loop of voltage regulation output change
Working power be separately input to strain signal acquisition circuit, strain signal amplifying return circuit, voltage conversion frequency loop and signal are adjusted
The power end of output loop processed；
Rotation circuit module is by the coupling of the second induction coil L3 and the first induction coil L1 by modulated signal and energy
Signal transmission gives stationary circuitry module；
The strain signal acquisition circuit gathers strain signal, and strain signal is exported gives strain signal amplifying return circuit,
Strain signal amplifying return circuit is amplified strain signal by predetermined ratio, and the strain signal after amplification is exported to voltage conversion frequency
Strain signal after amplification is converted into the side with strain signal linearly by predetermined ratio in loop, voltage conversion frequency loop
Ripple signal arrives the base stage of triode T1 through base resistance output, and the emitter stage connection of triode T1 is digitally；
When the high level of square-wave signal is input to the base stage of triode T1, triode T1 is off state, colelctor electrode
First resistor R1 is not turned on；
When the low level of square-wave signal is input to the base stage of triode T1, triode T1 conductings, colelctor electrode first resistor
R1 is turned on, and has dragged down the output voltage of commutating circuit, and load down causes commutating circuit, power resonance loop and the second sensing
Electric current in coil L3 changes, that is, export modulated signal；The electric current changed in the second induction coil L3 causes first
Curent change in induction coil L1, electric capacity C1 both end voltages change, so as to cause curent change in power amplification loop, most
The output power of dc source is caused to change eventually；Meanwhile,
The change control source at electric capacity C1 two ends is to signal demodulator loop, the change voltage that signal demodulator loop will receive
After carrying out rectification, export and give LPF loop, LPF loop will obtain and modulation after HFS filtering process
The signal of signal Complete Synchronization change, and export and give signal shaping amplifying return circuit, signal shaping amplifying return circuit is to the letter that receives
Number carry out shaping and enhanced processing is reduced into modulated signal, and export and give control system MCU.
A kind of electric assisted bicycle pedal power signal detection modulation circuit of the invention be mainly used in it is electric boosted from
Driving torque collection, applies also for non-contact type electric energy transmission during all rotations, and multiple signals are mutually transmitted；For example：Torque
Sensor, motor rotor temperature real-time monitoring, it is also possible to which rotor parameter setting etc. is changed by signal transmission.
In a word, compared with prior art, the present invention adjusts a kind of original electric assisted bicycle pedal power signal detection
Circuit processed is divided into two independent circuit modules, stationary circuitry module and rotation circuit module, and two circuit modules pass through two
Coil intercouples, and it is completely isolated to realize two circuits, while it is wireless to rotation circuit module to realize stationary circuitry module
Power supply, reduces circuit power consumption, simplifies circuit structure, it is adaptable to smaller mounting location, and when crank shaft is in rotary work
When, two circuit boards are in the absence of contact and rub；In addition, the strain signal of strain signal acquisition circuit collection is by a series of changes
Change, using the coupling between two coils, modulated signal is finally passed into control system in the form of disturbing electric energy, realize
The transmission of the multichannel data signal of stationary circuitry and rotation circuit, using modulating pulsewidth highly, pulsewidth width and pulse duration frequency come
The different signal of identification；Furthermore, strain signal acquisition circuit detects the strength of manpower pedal, by the coupling of an even circuit
Close biography and be transferred to control system, control system gives electric assisted bicycle distribution according to the actual signal of collection or the value of setting
Power-assisted power, realizes impression of smoothly riding.
Claims (10)
1. a kind of electric assisted bicycle pedal power signal detection modulation circuit, system is controlled for detecting that external signal is passed to
System, or the command signal that control system is sent passes to execution unit, it is characterised in that the circuit includes：
One speed/direction sensor module, for picking rate and direction signal；
One speed detecting component, for detection speed data；
One rotation circuit module, gathers external signal；
One stationary circuitry module, couples the rotation circuit module, can provide electric energy to rotation circuit.
2. a kind of electric assisted bicycle pedal power signal detection modulation circuit according to claim 1, it is characterised in that
The stationary circuitry module can mutually transmit multiple signals with rotation circuit module.
3. a kind of electric assisted bicycle pedal power signal detection modulation circuit according to claim 1, it is characterised in that
The stationary circuitry module includes：
One dc source, for each loop of stationary circuitry module provides direct current；
One clock signal generating loop, is powered by dc source, the input in one power amplification loop of output termination；
The power amplification loop, is powered by dc source, output one induction coil L1 of termination, another termination of induction coil L1
The positive pole of one electric capacity C1, the negative pole ground connection of electric capacity C1；
One signal demodulator loop, is powered by dc source, and input is connected to the contact of induction coil L1 and electric capacity C1, output end
Connect the input in a LPF loop；
The LPF loop, is powered by dc source, the input of output one signal shaping amplifying return circuit of termination；
The signal shaping amplifying return circuit, is powered by dc source, output end connection MCU.
4. a kind of electric assisted bicycle pedal power signal detection modulation circuit according to claim 3, it is characterised in that
The power amplification loop includes triode, and the signal demodulator loop includes diode.
5. a kind of electric assisted bicycle pedal power signal detection modulation circuit according to claim 3, it is characterised in that
The rotation circuit module includes：
One induction coil L3, couples with the induction coil L1；
One power resonance loop, it is in parallel with induction coil L3, what the induction coil L2 that induction coil L3 is received sent out
Electromagnetic wave energy is maximized；
One commutating circuit, the output end in input termination power resonance loop, the input of output one unidirectional circuit of termination, the list
To the input of output one filter circuit of termination in loop, the output of the filter circuit terminates a loop of voltage regulation, loop of voltage regulation
For strain signal acquisition circuit, strain signal amplifying return circuit and voltage conversion frequency loop provide supply voltage；
The strain signal acquisition circuit gathers external signal, and output end scoops out the input of varying signal amplifying return circuit, described to answer
The input in the output termination voltage conversion frequency loop of varying signal amplifying circuit, the output termination letter in the voltage conversion frequency loop
Number modulation output loop input, another termination load resistance R1 of the signal modulation output loop, load resistance R1's
The other end connects the contact of the commutating circuit and unidirectional circuit.
6. a kind of electric assisted bicycle pedal power signal detection modulation circuit according to claim 5, it is characterised in that
The commutating circuit is single-phase half-wave rectifier circuit.
7. a kind of electric assisted bicycle pedal power signal detection modulation circuit according to claim 5, it is characterised in that
The signal modulation output loop includes triode T1, and the output end in the voltage conversion frequency loop connects three by a resistance R2
The base stage of pole pipe T1, the colelctor electrode of triode T1 meets load resistance R1, the grounded emitter of triode T1.
8. a kind of electric assisted bicycle pedal power signal detection modulation circuit according to claim 5, it is characterised in that
The external signal is the faint change of the resistance strain sensor caused by the moment variations of rotary shaft；
The strain signal acquisition circuit gathers the faint change of the resistance strain sensor, and exports the first strain signal；
The strain signal amplifying return circuit amplifies the first strain signal according to setting ratio, and exports the second strain signal；
Second strain signal is converted into ratio linear with the second strain signal by the voltage conversion frequency loop according to setting ratio
The square-wave signal output of example；
The square-wave signal controls the conducting of resistance R1 by the on-off action of triode T1, drags down the output of the commutating circuit
Voltage, causes load down；
Load down causes the curent change of commutating circuit, power resonance loop and induction coil L3 so that in induction coil L1
Generation couple current, and then cause the change of the output power of dc source by electric capacity C1 and power amplification loop, realize adjusting
The transmission of signal processed.
9. a kind of electric assisted bicycle pedal power signal detection modulation circuit according to claim 8, it is characterised in that
The voltage waveform at electric capacity C1 two ends is modulated into data envelopment form；The data envelopment is examined by the signal demodulator loop commutation
After ripple, by the faint change that the output of LPF loop changes with modulated signal Complete Synchronization, then amplify by signal shaping
Loop treatment is reduced into modulated signal and exports to MCU.
10. a kind of electric assisted bicycle pedal power signal detection modulator approach, it is characterised in that the signal detection modulator approach
Realized based on a kind of electric assisted bicycle pedal power signal detection modulation circuit, automobile-used signal detection modulation circuit includes：It is quiet
Only circuit module and rotation circuit module；
Stationary circuitry module：The stationary circuitry module includes dc source, clock signal generating loop, power amplification loop, letter
Number detector circuit, LPF loop, signal shaping amplifying return circuit, the first induction coil L1 and electric capacity C1；Wherein, dc source
Clock signal generating loop is connected respectively, and power amplification loop, signal demodulator loop, LPF loop and signal shaping are amplified
The power end in loop；The input in the output end connection power amplification loop of clock signal generating loop, power amplification loop
Output end connects one end of the first induction coil L1, the positive pole of the other end connection electric capacity C1 of the first induction coil L1, electric capacity C1
Negative pole ground connection；The input in signal demodulator loop is connected to the contact of the first induction coil L1 and electric capacity C1, output end connection
The input in LPF loop, the output end in LPF loop connects the input of signal shaping amplifying return circuit, and signal is whole
The output end of shape amplifying return circuit is connected to MCU；
Rotation circuit module：The rotation circuit module include the second induction coil L3, power resonance loop, commutating circuit, unidirectionally
Loop, filter circuit, loop of voltage regulation, strain signal acquisition circuit, strain signal amplifying return circuit, voltage conversion frequency loop, signal
Modulation output loop, first resistor R1 and base resistance；The signal modulation output loop includes triode T1；Wherein, second
Induction coil L3 is connected in parallel with power resonance loop, and the output end in power resonance loop connects the input of commutating circuit, whole
The output end for flowing back to road connects the input of unidirectional circuit, and the output end of unidirectional circuit connects the input of filter circuit, filtering
The output end in loop connects the input of loop of voltage regulation, and the output end of loop of voltage regulation connects strain signal acquisition circuit respectively, should
Varying signal amplifying return circuit and the power end in voltage conversion frequency loop；The output end connection strain signal of strain signal acquisition circuit is put
The input in big loop, the input in the output end connection voltage conversion frequency loop of strain signal amplifying return circuit, voltage conversion frequency
One end of the output end connection base resistance in loop, the base stage of the other end connecting triode T1 of base resistance, triode T1's
Grounded emitter, one end of the colelctor electrode connection first resistor R1 of triode T1, the other end connection rectification of first resistor R1 is returned
Road and the contact of unidirectional circuit；First induction coil L1 of the stationary circuitry module feels with the second of the rotation circuit module
Coil L3 is answered to couple；
Above-mentioned signal detecting method is：
Stationary circuitry module provides electricity by the rotation circuit module that is coupled as of the first induction coil L1 and the second induction coil L3
Energy；The clock signal that the clock signal generating loop of the stationary circuitry module is produced, output work is amplified through power amplification loop
Rate signal, the power signal after amplification is by causing the first induction coil to produce sensing magnetic after the first induction coil L1 and electric capacity C
, while electric capacity C1 stored electric energies；
Second induction coil L3 of the rotation circuit module rotates in the induced field that the first induction coil L1 is produced,
Second induction coil L3 two ends produce induced electromotive force, and produce sensing alternating current, and sensing alternating current is by power resonance
Loop maximizes electric energy, then input rectifying loop, and alternating current is converted into pulse direct current and exported by commutating circuit；It is whole
The pulse direct current for flowing back to road output is input to filter circuit through unidirectional circuit all the way, and filter circuit is filtered pulse direct current
Ripple and energy storage, filtered DC supply input loop of voltage regulation, the high stability of loop of voltage regulation output and the work of low ripple change
Power supply is separately input to strain signal acquisition circuit, and strain signal amplifying return circuit, voltage conversion frequency loop and signal modulation are exported
The power end in loop；
Rotation circuit module is by the coupling of the second induction coil L3 and the first induction coil L1 by modulated signal and energy signal
Pass to stationary circuitry module；
The strain signal acquisition circuit gathers strain signal, and strain signal is exported gives strain signal amplifying return circuit, strains
Signal amplifying return circuit is amplified strain signal by predetermined ratio, and the strain signal after amplification is exported to voltage conversion frequency time
Strain signal after amplification is converted into the square wave with strain signal linearly by predetermined ratio in road, voltage conversion frequency loop
Signal arrives the base stage of triode T1 through base resistance output, and the emitter stage connection of triode T1 is digitally；
When the high level of square-wave signal is input to the base stage of triode T1, triode T1 is off state, colelctor electrode first
Resistance R1 is not turned on；
When the low level of square-wave signal is input to the base stage of triode T1, triode T1 conductings, colelctor electrode first resistor R1 leads
It is logical, the output voltage of commutating circuit has been dragged down, load down causes commutating circuit, power resonance loop and the second induction coil
Electric current in L3 changes, that is, export modulated signal；The electric current changed in the second induction coil L3 causes the first sensing
Curent change in coil L1, electric capacity C1 both end voltages change, and so as to cause curent change in power amplification loop, finally draw
The output power for playing dc source changes；Meanwhile,
To signal demodulator loop, the change voltage that signal demodulator loop will receive is carried out the change control source at electric capacity C1 two ends
After rectification, export and give LPF loop, LPF loop will obtain and modulated signal after HFS filtering process
The signal of Complete Synchronization change, and export and give signal shaping amplifying return circuit, signal shaping amplifying return circuit enters to the signal for receiving
Row shaping and enhanced processing are reduced into modulated signal, and export and give control system MCU.
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| CN201710104516.4A CN106787250B (en) | 2017-02-24 | 2017-02-24 | Electric power-assisted bicycle pedal force signal detection and modulation circuit and method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107672732A (en) * | 2017-11-08 | 2018-02-09 | 广州市快易达工贸有限公司 | A kind of built-in motor using dynamic pickup electrical combination |
| WO2023017211A1 (en) * | 2021-08-10 | 2023-02-16 | Revonte Oy | Pedal shaft measurement arrangement and system, and method for controlling power unit |
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| CN1223719A (en) * | 1996-10-25 | 1999-07-21 | 三洋电机株式会社 | Manually operated travelling vehicle with auxiliary power |
| CN104163225A (en) * | 2014-08-27 | 2014-11-26 | 天津市弘塔科技有限公司 | Electric bicycle simulation torque assistance sensing control system and implementation method thereof |
| CN105857115A (en) * | 2016-06-12 | 2016-08-17 | 南京壹佰克智能科技有限公司 | Motor intelligent control system for electric bicycle |
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2017
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1223719A (en) * | 1996-10-25 | 1999-07-21 | 三洋电机株式会社 | Manually operated travelling vehicle with auxiliary power |
| CN104163225A (en) * | 2014-08-27 | 2014-11-26 | 天津市弘塔科技有限公司 | Electric bicycle simulation torque assistance sensing control system and implementation method thereof |
| CN105857115A (en) * | 2016-06-12 | 2016-08-17 | 南京壹佰克智能科技有限公司 | Motor intelligent control system for electric bicycle |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107672732A (en) * | 2017-11-08 | 2018-02-09 | 广州市快易达工贸有限公司 | A kind of built-in motor using dynamic pickup electrical combination |
| WO2023017211A1 (en) * | 2021-08-10 | 2023-02-16 | Revonte Oy | Pedal shaft measurement arrangement and system, and method for controlling power unit |
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| Publication number | Publication date |
|---|---|
| CN106787250B (en) | 2023-08-22 |
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