CN103419889A - Power control mechanism of electric power bicycle - Google Patents
Power control mechanism of electric power bicycle Download PDFInfo
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- CN103419889A CN103419889A CN2012101572117A CN201210157211A CN103419889A CN 103419889 A CN103419889 A CN 103419889A CN 2012101572117 A CN2012101572117 A CN 2012101572117A CN 201210157211 A CN201210157211 A CN 201210157211A CN 103419889 A CN103419889 A CN 103419889A
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Abstract
The invention discloses a power control mechanism of an electric power bicycle. The power control mechanism comprises a front wheel, a back wheel, a left pedal, a right pedal, a chain, a flywheel, a front wheel rotating plate, a front wheel revolution speed transducer, a front wheel revolution speed transducer support, a flywheel revolution speed transducer, a flywheel revolution speed transducer support and a microprocessor. The flywheel revolution speed transducer and the front wheel revolution speed transducer constantly send revolution signals of the flywheel and revolution signals of the front wheel to the microprocessor, and the microprocessor works out the revolution speed and the revolution speed acceleration of the flywheel and the front wheel and automatically controls a motor to adjust the power. By means of the power control mechanism, the two transducers are additionally arranged on the electric power bicycle, complex tiny deformation or displacement detection and amplification are not needed, the revolution speed of the flywheel and the revolution speed of the front wheel can be directly measured only through the transducers, a rider pedals to change the revolution speed of the flywheel, namely, the purpose that the power is adjusted by controlling the motor safely and reliably can be achieved. Therefore, the power control mechanism of the electric power bicycle is safe, reliable, simple in structure and low in detection precision demand, and a pedal power control mechanism of an original structure of an electric power bicycle is not changed.
Description
Technical field
The invention belongs to field of intelligent control, relate to a kind of assisted control of electric assisted bicycle.
Background technology
Electric assisted bicycle must have the manpower acting, and can not purely by motor, provide power, and motor only provides supplementary power for riding, and such electric assisted bicycle just meets the standard of various countries.Therefore must be using the foot-operated Power assisted control signal as electric assisted bicycle of manpower, and can not use handle to control, 2 benefits have been done like this, meet first national standard, second can, so that the use of battery is more reasonable, extends the service life of battery and increase the once distance of riding of charging.
The various patents of having announced at present, take moment sensing control as main, directly or indirectly measure by mechanical device the variation that the bicyclist tramples other physical quantity that moment causes of pedal generation, according to the variation of this physical quantity, export corresponding electric signal, thereby control the size of motor acting; For example: 00217870.2 torque sensor, 201020622645.6 1 kinds of moment dynamometry and moment sensing Voltage-output mechanisms that electrical salf-walking is automobile-used; They have common characteristics, all need to be for the mechanical detection means of foot-operated caused certain physical quantity of moment of torsion produced, or certain swing offset amount or axial displacement, displacement need to amplify by enlargers such as levers toward contact, finally by magnet and Hall or photounit, is converted to electric signal.These modes of measuring moment realize, by the mode of bicyclist's the foot-operated Power assisted control to Electrical Bicycle, following defect is arranged:
1, foot-operated moment detects needs complicated physical construction, and because the foot-operated direct or indirect physical displacement (dislocation of hand of rotation or axial movement) caused is a small deflection, this device of sensor that just requires to detect this displacement is very accurate, physical construction is accurate, the requirement of its setting accuracy is also just higher, out of doors, under the environment for use of vibration, very difficult its operating accuracy that stably keeps just;
2, most moment detects the positions such as transfer devices are arranged in axis, hind axle, the existing machinery structure of vehicle is had to change, but not simply install a mechanical device additional, and this has just limited the popularization of these assisted controls;
3, solely detect foot-operated pedal force, be difficult to avoid vehicle to trample pedal because of error at various unsafe conditions or under the state that does not need to accelerate.
Therefore lack at present a kind of safe and reliable, simple in structure, accuracy of detection and require low, as not change electric assisted bicycle original structure assisted pedal stroke control mechanism.
Use inductive displacement transducer in embodiments of the invention, when metal, during at the interior induction zone by sensor of 5mm distance, sensor can detect and export corresponding electric signal.Inductive displacement transducer, claim again self-inductance sensor, and the variation by straight line or angular transposition consisted of unshakable in one's determination and coil is converted to the sensor that winding inductance quantity changes.The coil turn of this sensor and material magnetic induction capacity are all certain, and the variation of its inductance value is to cause because the displacement input causes the geometrical variations of coil magnetic circuit.When coil being accessed to metering circuit and connecting excitation power supply, just can obtain the voltage or the electric current output that are proportional to the displacement input.The characteristics of inductive pickoff are: 1. without armature contact, fiduciary level is high, the life-span is long; 2. resolution is high; 3. highly sensitive; 4. the linearity is high, reproducible; 5. measurement range wide (when measurement range is large, resolution is low); During 6. without input, the zero-bit output voltage is arranged, cause measured error; 7. frequency and the amplitude stability of excitation power supply are had relatively high expectations; 8. be not suitable for the high frequency dynamic measurement.Inductive pickoff is mainly used in displacement measurement and can converts the measurement of the mechanical quantity (as power, tension force, pressure, pressure reduction, acceleration/accel, vibration, strain, flow, thickness, liquid level, proportion, torque etc.) of change in displacement to.Inductive pickoff commonly used has clearance-changed type, changed area and screwed pipe dowel type.
Summary of the invention
The technical problem to be solved in the present invention is: provide a kind of safe and reliable, simple in structure, accuracy of detection to require low, as not change electric assisted bicycle original structure assisted pedal stroke control mechanism.
The technical scheme that the present invention solves its technical matters is:
A kind of assisted control of electric assisted bicycle, comprise that left and right is foot-operated, chain, flywheel, front-wheel, trailing wheel, front-wheel rotating disk, front wheel rotation speed sensor, front wheel rotation speed sensor stand, Speed of Reaction Wheels sensor, Speed of Reaction Wheels sensor stand, microprocessor;
The front-wheel rotating disk is concentric with front wheel spindle, is fixedly installed on the front-wheel flower-drum, and the front-wheel rotating disk is identical with the rotating speed of front-wheel all the time; The front-wheel rotating disk along the circumferential direction equidistantly has some identical grooves;
The front wheel rotation speed sensor is fixedly installed on front fork by the front wheel rotation speed sensor stand, and the induction end face of front wheel rotation speed sensor is parallel with the front-wheel rotating disk, at a distance of 1-5mm; Every rotation of each groove of front-wheel rotating disk is by a front wheel rotation speed sensor, and the front wheel rotation speed sensor detects a signal;
Speed of Reaction Wheels sensor stand one end fixed cover on flywheel shaft, an end is fixedly mounted on vehicle frame;
The Speed of Reaction Wheels sensor is fixed on the Speed of Reaction Wheels sensor stand by fastener, the induction end face of Speed of Reaction Wheels sensor is parallel with the tangential direction of flywheel, the crown of Speed of Reaction Wheels sensor and flywheel remains a fixing distance, the scope of this distance is 1 to 5mm, and two end face distances in the center of the induction zone of Speed of Reaction Wheels sensor and flywheel equate;
Front wheel rotation speed sensor, Speed of Reaction Wheels sensor transmit signal to microprocessor by wire.
Principle of work of the present invention is: the foot-operated propulsive effort of user passes to flywheel by chain, when flywheel will drive the trailing wheel acceleration, the rotating speed of flywheel (cireular frequency) must be identical with the rotating speed of trailing wheel, while normally riding, the rotating speed of trailing wheel and front-wheel is identical, so the rotating speed of flywheel is identical with front wheel rotation speed.When being intended that of user accelerates to ride, the user must drive vehicle to accelerate to advance by the foot-operated pedal force applied, can calculate the rotating speed acceleration/accel of flywheel by the Speed of Reaction Wheels of continuous gauging, can obtain bicyclist's acceleration intention and the speed accelerated, thereby control motor and export corresponding power, auxiliary bicyclist rides.
What the present invention directly measured is front-wheel, the rotating speed of flywheel, sensor can adopt inductive displacement transducer or capacitive displacement transducer, need not contact and can measure rotating speed, not only survey precision requires low, physical construction is simple, and due to the rotating speed of having measured front-wheel simultaneously, therefore when stationary vehicle is motionless or speed when too low, can also avoid providing the motor power-assisted to vehicle mistakenly, for example: when the vehicle front-wheel, by obstacle, stopped or automobile low-speed while turning around, bicyclist's error is firmly stepped on foot-operated, can the output motor power-assisted or the very slight motor power-assisted of output only yet, and adopt existing various torque sensor, all can't avoid this potential safety hazard, it is all without exception the power-assisted size that the strength size of trampling according to the bicyclist is controlled motor.
The invention has the beneficial effects as follows, apply the assisted control of electric assisted bicycle provided by the invention, Speed of Reaction Wheels sensor and front wheel rotation speed sensor constantly send to microprocessor by the tach signal of flywheel and front-wheel, microprocessor calculates rotating speed, the rotating speed acceleration/accel of flywheel and front-wheel, and automatic control motor is adjusted the power-assisted size.Application the present invention, at additional two sensors of electric assisted bicycle, without the detection of carrying out complicated miniature deformation or displacement and amplification, only need directly measure flywheel and front wheel rotation speed by sensor, the bicyclist, by the foot-operated rotating speed that changes flywheel, can realize safely and reliably controlling motor and adjust the power-assisted size.Therefore, the assisted control of electric assisted bicycle provided by the invention, safe and reliable, simple in structure, accuracy of detection requires low, as not change electric assisted bicycle original structure assisted pedal stroke control mechanism.
The accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is the function schematic block diagram of assisted control that the electric assisted bicycle of embodiment mono-is shown;
Fig. 2 is the front elevation of position that the front wheel rotation speed sensor of embodiment mono-is shown;
Fig. 3 is the birds-eye view of position that the front wheel rotation speed sensor of embodiment mono-is shown;
Fig. 4 is the front elevation of position that the Speed of Reaction Wheels sensor of embodiment mono-is shown;
Fig. 5 is the birds-eye view of position that the Speed of Reaction Wheels sensor of embodiment mono-is shown.
The specific embodiment
For understanding better content of the present invention, below describe the preferred embodiments of the present invention in detail.
Embodiment mono-
The present invention has disclosed a kind of assisted control of electric assisted bicycle.
Consult the function schematic block diagram of assisted control of the electric assisted bicycle of accompanying drawing 1, shown in figure:
The present embodiment comprises: front-wheel 10, trailing wheel 20, foot-operated (left side) 32, foot-operated (right side) 31, chain 40, flywheel 50, front-wheel disc brake dish 101, front wheel rotation speed sensor 102, front wheel rotation speed sensor stand 103, Speed of Reaction Wheels sensor 104, Speed of Reaction Wheels sensor stand 105, microprocessor 106.Front-wheel disc brake dish 101 is concentric with front wheel spindle 11, and Speed of Reaction Wheels sensor 104 is fixing by Speed of Reaction Wheels sensor stand 105, and an end of Speed of Reaction Wheels sensor stand 105 is placed on hind axle 21.
Consult accompanying drawing 2, by the fixing front wheel rotation speed sensor 102 of front wheel rotation speed sensor stand 103; Consult accompanying drawing 5, by the fixing Speed of Reaction Wheels sensor 104 of Speed of Reaction Wheels sensor stand 105, front wheel rotation speed sensor 102 and Speed of Reaction Wheels sensor 104 are transferred to microprocessor 106 by wire by the rotary speed data detected.
In the present embodiment, what front wheel rotation speed sensor 102, Speed of Reaction Wheels sensor 104 were used is inductance approach switch, at distance inductance approach switch 5mm scope internal induction, to metal object, can trigger approach switch and send a signal.The induction zone diameter of sensor is 6mm.
In the present embodiment, use front-wheel disc brake dish 101 as the front-wheel rotating disk.
Accompanying drawing 2 and accompanying drawing 3 are for illustrating front elevation and the birds-eye view of front wheel rotation speed sensor 102 installation sites, as shown in accompanying drawing 2, accompanying drawing 3: front-wheel disc brake dish 101 is concentric with front wheel spindle 11, front wheel rotation speed sensor 102 is parallel with front-wheel disc brake dish 101, distance between the two is within the induction range of front wheel rotation speed sensor 102, what in the present embodiment, use is inductive displacement transducer, induction range is 5mm, and the distance of the two is in the 5mm scope.Front wheel rotation speed sensor stand 103 has 4 mounting holes, by screw, front wheel rotation speed sensor stand 103 and front wheel rotation speed sensor 102 is fixed on the front fork of electric assisted bicycle.Front-wheel disc brake dish 101 along the circumferential direction has 8 grooves, and the size of groove is greater than the induction zone of front wheel rotation speed sensor 102, when groove rotates by induction zone, has 2 states: A condition, and between induction zone and groove, surrounding is gapped; The B state is very close to each other in certain direction between induction zone and groove; When switching between A condition and B state, front wheel rotation speed sensor 102 can send a signal, sends microprocessor 106 to.Front-wheel disc brake dish 101 in the present embodiment has 8 grooves, therefore rotate one week, front wheel rotation speed sensor 102 sends 8 detection signals to microprocessor 106, this only represents a kind of selection of the present embodiment, and the quantity that front-wheel disc brake dish 101 is along the circumferential direction slotted can need selection more or less according to detecting.
Accompanying drawing 4 and accompanying drawing 5 are for illustrating front elevation and the birds-eye view of Speed of Reaction Wheels sensor 104 installation sites, as can be seen from Figure, the end face of Speed of Reaction Wheels sensor 104 is vertical with flywheel 50, the crown distance of Speed of Reaction Wheels sensor 104 and flywheel 50 is within the induction range of Speed of Reaction Wheels sensor 104, what in the present embodiment, use is inductive displacement transducer, induction range is 5mm, and the distance of the two is in the 5mm scope.Speed of Reaction Wheels sensor stand 105 1 ends are enclosed within on hind axle 21, also has a mounting hole 1051 on Speed of Reaction Wheels sensor stand 105, by mounting hole 1051, Speed of Reaction Wheels sensor stand 105 is fixed on vehicle frame, on Speed of Reaction Wheels sensor 104 Speed of Reaction Wheels sensor stands 105, the two does not have relative motion, therefore Speed of Reaction Wheels sensor 104 is constant with the position of flywheel crown, remains at the induction range interior (5mm) of Speed of Reaction Wheels sensor 104.Flywheel 50 in the present embodiment is 14 teeth, and flywheel 50 rotates one week Speed of Reaction Wheels sensor 104 and sends 14 detection signals to microprocessor 106, and this only represents a kind of selection of the present embodiment, and the number of teeth of flywheel 50 can be selected as required.Chain 40 pitches of standard are about 12mm, much larger than the induction zone diameter (the present embodiment is 6mm) of Speed of Reaction Wheels sensor 104.
Below the present embodiment is realized the Power assisted control working process accelerated, slow down is described respectively:
During stationary vehicle, accelerate: the bicyclist firmly tramples foot-operated (left side) 32 and foot-operated (right side) 31, microprocessor 106 is by the rotary speed data of front wheel rotation speed sensor 102,104 transmission of Speed of Reaction Wheels sensor, the rotating speed of finding front-wheel 10 equals 0, microprocessor 106 is controlled motors power-assisted is not provided, and waits for that front-wheel 10 rotating speeds being detected is greater than at 0 o'clock and just starts power-assisted.This contributes to protect storage battery, also can avoid turning around simultaneously, front-wheel by situations such as diebacks under, bicyclist's mistake pedal causes that unnecessary power-assisted accelerates, and causes the bicyclist personal safety accident to occur.
The vehicle middle acceleration of riding: the bicyclist firmly tramples foot-operated (left side) 32 and foot-operated (right side) 31, rotate by chain 40 flywheel drivens 50, accelerate to rotate thereby drive trailing wheel 20, now the rotating speed of flywheel 50 is identical with trailing wheel 20, the synchronous front-wheel 10 that drives of trailing wheel 20 accelerates to rotate, and front-wheel 10 is identical with the rotating speed of trailing wheel 20.Microprocessor 106 is by the rotary speed data of front wheel rotation speed sensor 102,104 transmission of Speed of Reaction Wheels sensor, the rotating speed of finding front-wheel 10 is greater than 0, flywheel 50 is identical with the rotating speed of front-wheel 10, and the rotating speed of flywheel 50 is rising, microprocessor 106 is controlled motor corresponding power-assisted is provided, the motor power-assisted ratio of vehicle under various speed can freely be arranged by controlling software, thereby obtains the power-assisted curve that different user is experienced.From the angle of protection motor and storage battery, to control in software when front-wheel 10 rotating speeds can be set lower than a threshold value, motor does not provide power-assisted, and for example: when the speed of a motor vehicle, during lower than 1 meter of per second, motor does not provide power-assisted.
Car retardation: the bicyclist does not trample foot-operated (left side) 32 and foot-operated (right side) 31, microprocessor 106 is by the rotary speed data of Speed of Reaction Wheels sensor 104 transmission, find that front-wheel 10 is identical with trailing wheel 20 rotating speeds, the rotating speed of trailing wheel 20 is greater than flywheel 50 rotating speeds, controls motor and stops providing power-assisted.
In sum, the assisted control of the electric assisted bicycle that application the present embodiment provides, Speed of Reaction Wheels sensor and front wheel rotation speed sensor constantly send to microprocessor by the tach signal of flywheel and front-wheel, microprocessor calculates rotating speed, the rotating speed acceleration/accel of flywheel and front-wheel, and automatic control motor is adjusted the power-assisted size.Application the present invention, at each and every one sensor of electric assisted bicycle additional two, without the detection of carrying out complicated miniature deformation or displacement and amplification, only need directly measure flywheel and front wheel rotation speed by sensor, the bicyclist, by the foot-operated rotating speed that changes flywheel, can realize safely and reliably controlling motor and adjust the power-assisted size.Therefore, the assisted control of electric assisted bicycle provided by the invention, safe and reliable, simple in structure, accuracy of detection requires low, as not change electric assisted bicycle original structure assisted pedal stroke control mechanism.
Claims (1)
1. the assisted control of an electric assisted bicycle, comprise that front-wheel, trailing wheel, left and right are foot-operated, chain, flywheel, it is characterized in that:
Also comprise: front-wheel rotating disk, front wheel rotation speed sensor, front wheel rotation speed sensor stand, Speed of Reaction Wheels sensor, Speed of Reaction Wheels sensor stand, microprocessor;
The front-wheel rotating disk is concentric with front wheel spindle, is fixedly installed on the front-wheel flower-drum, and the front-wheel rotating disk is identical with the rotating speed of front-wheel all the time; The front-wheel rotating disk along the circumferential direction equidistantly has some identical grooves;
The front wheel rotation speed sensor is fixedly installed on front fork by the front wheel rotation speed sensor stand, and the induction end face of front wheel rotation speed sensor is parallel with the front-wheel rotating disk, at a distance of 1-5mm; Every rotation of each groove of front-wheel rotating disk is by a front wheel rotation speed sensor, and the front wheel rotation speed sensor detects a signal;
Speed of Reaction Wheels sensor stand one end fixed cover on flywheel shaft, an end is fixedly mounted on vehicle frame;
The Speed of Reaction Wheels sensor is fixed on the Speed of Reaction Wheels sensor stand by fastener, the induction end face of Speed of Reaction Wheels sensor is parallel with the tangential direction of flywheel, the crown of Speed of Reaction Wheels sensor and flywheel remains a fixing distance, the scope of this distance is 1 to 5mm, and two end face distances in the center of the induction zone of Speed of Reaction Wheels sensor and flywheel equate;
Front wheel rotation speed sensor, Speed of Reaction Wheels sensor transmit signal to microprocessor by wire.
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| CN2012101572117A CN103419889A (en) | 2012-05-21 | 2012-05-21 | Power control mechanism of electric power bicycle |
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| CN2012101572117A CN103419889A (en) | 2012-05-21 | 2012-05-21 | Power control mechanism of electric power bicycle |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104986282A (en) * | 2015-07-15 | 2015-10-21 | 四川安尔达电动车有限公司 | Electric bicycle control method and apparatus |
| GB2528361A (en) * | 2014-05-16 | 2016-01-20 | Ford Global Tech Llc | Electric propulsion control system |
| 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 |
| CN110114265A (en) * | 2016-12-28 | 2019-08-09 | 雅马哈发动机株式会社 | Electronic auxiliary system and electric auxiliary vehicle |
| CN111846094A (en) * | 2019-05-15 | 2020-10-30 | 北京嘀嘀无限科技发展有限公司 | Vehicle control method and device |
| TWI739253B (en) * | 2019-12-25 | 2021-09-11 | 國立高雄科技大學 | Transporting means power control system |
| CN114684312A (en) * | 2021-07-20 | 2022-07-01 | 建德市五星车业有限公司 | Power-assisted output mechanism, mounting method thereof and electric power-assisted bicycle |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| GB2528361A (en) * | 2014-05-16 | 2016-01-20 | Ford Global Tech Llc | Electric propulsion control system |
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| TWI739253B (en) * | 2019-12-25 | 2021-09-11 | 國立高雄科技大學 | Transporting means power control system |
| CN114684312A (en) * | 2021-07-20 | 2022-07-01 | 建德市五星车业有限公司 | Power-assisted output mechanism, mounting method thereof and electric power-assisted bicycle |
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Application publication date: 20131204 |