CN103381870B - Rotary disc type sensing element with multiple magnets and unevenly distributed magnetic fluxes - Google Patents
Rotary disc type sensing element with multiple magnets and unevenly distributed magnetic fluxes Download PDFInfo
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- CN103381870B CN103381870B CN201310309348.4A CN201310309348A CN103381870B CN 103381870 B CN103381870 B CN 103381870B CN 201310309348 A CN201310309348 A CN 201310309348A CN 103381870 B CN103381870 B CN 103381870B
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Abstract
The invention discloses a rotary disc type sensing element with multiple magnets and unevenly distributed magnetic fluxes, belongs to the technical field of magnetic induction provided signals, and particularly relates to technology of providing control signals via multi-point magnetic induction on a rotating component. Multiple permanent magnets distributed annularly are fixedly arranged on a rotary disc, at least two permanent magnets are different in magnetic flux, and at least one permanent magnet is in threaded connection with the rotary disc; on one surface of the rotary disc, magnetic polarities of two adjacent permanent magnets are opposite, that is, the distribution manner of magnetic polarities of all permanent magnets on one surface of the rotary disc is as follows: N pole, S pole, N pole, ...; a Hall element is arranged in a position close to the permanent magnets. The rotary disc type sensing element has the advantages as follows: based on the distribution manner that the magnetic polarities of two adjacent permanent magnets are opposite, the Hall element can obtain square-wave signals, and the signals can be digitally processed conveniently; based on difference in the magnetic flux, the square-wave signals can indicate the positions of the permanent magnets on the rotary disc, so that the purposes of different square-wave signals can be determined.
Description
Technical field
The invention belongs to the technical field that magnetic induction provides signal, particularly relate on rotatable parts, carry out the technology that multi-point magnetic induction provides control signal.
Background technology
The Chinese patent 201020295192.0 " hooking claw moment sensor " of Yebao Vehicle Material Industry's application discloses a kind of morpet sensing device, sensing device comprises magnetic part and elastic component coordinates, and experiences the sensing device of moment.After period of service is long, the elasticity modulus change of elastic component will cause the control effects of transducing signal and controlled motor to change, and power-assisted effect becomes to be needed to mismatch with the power-assisted of people.And complicated with the project organization of elastic component, manufacturing cost is high.
The Chinese patent 01201843.0 " automatic detecting device of electric booster bicycle " of University of Science & Technology, Beijing's application discloses a kind of automatic detecting device of electric booster bicycle, Poul Dorset Sheep is pedaled power, speed and is turned to, this device establishes magnetic sheet respectively on the inside and outside wheel disc of relative motion, interior wheel disc there is spring, with spring reset between inside and outside wheel disc, represent the power of pedaling, speed with the electric signal that the magnetic sheet that the Hall of two on support surveys relative motion on inside and outside wheel disc produces and turn to.
Shortcoming (1) is not durable with elastic component: after period of service is long, and the elasticity modulus change of elastic component will cause the control effects of transducing signal and controlled motor to change, and power-assisted effect becomes to be needed to mismatch with the power-assisted of people, and complex structure, cost is high.
Shortcoming (2) each magnetic sheet group is identical and magnetic pole set-up mode is all identical, and the respective position of different magnetic sheet group can not be represented, the power-assisted demand that diverse location is special can not be expressed: from Fig. 3 of 01201843.0 patent, 4, 5, 6 and the record explanation of Instructions Page 2 the 2nd section, each magnetic sheet group (comprises a magnetic sheet 4, a magnetic sheet 5, a magnetic sheet 6) magnetic pole set-up mode all identical, namely be only simply from being provided with identical magnetic sheet group again at interior diverse location of taking turns, the respective position of different magnetic sheet group can not be represented, the state of kinematic motion of ad-hoc location can not be represented, and people by bike time, pedal and each position corresponding with pedal are at state of kinematic motion, the power-assisted demand having oneself special, but the structure that this each magnetic sheet group of this patent is identical, the power-assisted demand that each diverse location on pedal is special can not be given expression to.
Shortcoming (3) each site signal indifference makes man-machine mismatching: each magnetic sheet group is the same, then each magnetic sheet group can not represent this position of magnetic sheet group on interior wheel, the signal that Hall exports can not represent the position of stretcher and other magnetic sheet group, namely the signal that Hall exports can not represent the demand of different foot position to power-assisted, cause the demand of power-assisted and provide the time of power-assisted to mismatch, namely man-machine cooperation is undesirable.
Shortcoming sine wave output makes magnetic sheet group Edge Distance can not be less than 4 centimetres, general is good with 5 centimetres, and make can establish magnetic sheet group number very little, man-machine cooperation is undesirable: each magnetic sheet group is identical, what then Hall exported is that sinusoidal waveform is as control signal, certain peak valley difference must be had as control signal sinusoidal waveform, magnetic sheet group due to this patent needs certain length to represent forward and reverse motion, be that the rolling disc circular trace of 20 centimetres establishes at most 8 magnetic sheet groups at diameter, general is good with 5, and Hall just can have the sine wave signal of controlling functions.That is, this technical scheme of 01201843.0 patent, for morpet, magnetic sheet group limited amount is only within 8, and very little, man-machine cooperation is undesirable for control signal.If but more than 8 magnetic sheet groups, when people's treadmill is very fast, the signal graph that Hall exports is close to a horizon, and this signal does not have controlling functions, can not control electrical motor, when making it need power-assisted especially, loses assist function.
Shortcoming (5) signal blind zone reaches miter angle, need during startup really to can not get power-assisted when power-assisted: well-known, it is minimum in summit moment that people steps on bicycle pedal, the region needing most power-assisted from leaving 10-45 degree angle, summit, but the angle between each magnetic sheet group of this patent is 45 degree, leave summit 10-45 degree angular zone neither one magnetic sheet group, also with regard to neither one control signal at stretcher, when consequently needing most power-assisted, but the motor of morpet really can not power-assisted.
In a word, except with except the not durable complex structure again of elastic component, because of the fit structure feature of Hall and magnetic sheet group, rotating disk size diameter is within 20 centimetres, and having placed restrictions on magnetic sheet group quantity is 8 groups, and magnetic sheet group number can not arbitrarily increase, make man-machine cooperation undesirable, and can not get power-assisted when starting, power-assisted demand is not mated with providing power-assisted, and the traveling comfort of cyclist is poor; As increased magnetic sheet group quantity by force, its transducing signal loses again Power assisted control function.
The Chinese patent 03264387.X " timing sensor of electric boosting bicycle " of Wang Naikang application discloses without elastic component, only with dynamic, fixed two rotating disks, two permanent magnetic steels are inlayed above Moving plate, three Hall elements are inlayed above price fixing, bicycle pedal circles, each Hall produces two pulses, then three Hall elements produce six pulses.Divide folding can obtain three features, four shortcomings are as follows:
Feature (1) is acquisition six impulse singlas, can only be each permanent magnetic steel same pole in one side: each Hall will produce two pulses, can only be then the same face that the same pole of two permanent magnetic steels is located at Moving plate, namely in certain one side of Moving plate, two permanent-magnet magnetic steel capital be the arctic or be all the South Pole.If at the same face of Moving plate, a permanent magnetic steel is the arctic, and another is the South Pole, then pedal circles, and each Hall just can only produce a pulse, and three Halls just only have three pulses, and this does not just conform with this patent specification and describes.In order to increase pulse count, improving control effects, can only be that each permanent magnetic steel same pole is in one side.
Feature (2) permanent magnetic steel is for representing pedal fixed position, three Halls represent pedal travel position: because pedal and Moving plate are synchronous axial system, so two positions fix a permanent magnetic steel respectively on the Moving plate corresponding with two pedals, some pedals turn where, then corresponding permanent magnetic steel also turns where; But only have and turn in the position having Hall, just send control signal by Hall, the power-assisted that the motor of commander's morpet produces to be needed is rotated.
Feature (3) can not represent the position of the middle Different periods pedal travel that circles because of a Hall, then just can not only with a Hall: the Different periods of pedal in circling, very big difference is had to power-assisted demand, embody the change of this power-assisted demand, this patent three Halls are located at three positions within 180 degree of angles respectively, two permanent magnetic steels are located at two pedal positions respectively, pedal turns in the position having Hall, with regard to output signal, this Hall represents that pedal reaches the position of this Huo Yuan.But there is again shortcoming below with multiple Hall.
These features as morpet sensor have three shortcomings:
The fixed position that shortcoming (1) does not have the permanent magnetic steel of otherness to represent two pedals respectively with two, just can only represent the turned position of pedal with multiple Hall: two permanent magnetic steels do not have otherness, advantage is can regardless of the fixed position representing two pedals respectively of left and right pin, make the raw power-assisted demand of its left and right human hair combing waste, identical motor power-assisted effect can be produced; But shortcoming is the turned position that permanent magnetic steel inherently can not represent pedal, and can only be located at multiple Hall the turned position that different angle positions represents pedal, so only with a Hall, and multiple Hall can not must be used.
Shortcoming (2) can not only with a Hall, and three Halls must cause three control signals to have original segment error, make the distortion of power-assisted demand model, naturally producing power-assisted exports with power-assisted demand inconsistent: no matter morpet is one or two motor, and its transducing signal controlling motor just can only can reach with a transducing signal input electric machine controller object controlling motor; And this patent controls motor with three Halls, then electric machine controller could be inputted after three of a three Halls control signal must being merged into a merging control signal.The parameter sensing of three Halls can not be the same, particularly due to after variation of ambient temperature, period of service length, the parameter sensing of three Halls may be widely different, when its result causes identical power-assisted demand, the output of different Hall be different voltages, cause motor to produce different power-assisteds to export, power-assisted exports with power-assisted demand inconsistent; During in like manner identical power-assisted demand, the output of different Hall may be identical voltage again, cause motor to produce same power-assisted and export, also produce power-assisted and export the problem inconsistent with power-assisted demand.
Shortcoming (3) merges control signal and easily produces signal drift, merging control signal is not mated with electric machine controller, power-assisted demand model distortion: due to variation of ambient temperature, after period of service is long, the parameter sensing of three Halls may be widely different, three control signal point of connection of three Halls must change, the merging control signal that then identical power-assisted demand produces will produce the signal drift of segmenting, merge control signal as an overall generation signal distortion, i.e. power-assisted demand model distortion, any one causing electric machine controller to select three control signals all can produce power-assisted as benchmark and export the problem inconsistent with power-assisted demand.
Shortcoming sensing site can not arbitrarily increase, sensing site very little, motor runs just not steady, people is by bike made to feel very uncomfortable: to cause because Hall quantity is greater than one owing to having shortcoming (1) and shortcoming (2) all, clearly Hall quantity is measured more and more, and shortcoming (1) and shortcoming (2) show more serious.So the morpet that this patent provides can only be make people by bike feel the morpet that traveling comfort is very bad.
Shortcoming (5) signal blind zone reaches 42 degree of angles, need during startup really to can not get power-assisted when power-assisted: well-known, it is minimum in summit moment that people steps on bicycle pedal, the region needing most power-assisted from leaving 10-45 degree angle, summit, but the angle between each Hall of this patent is 42.5-43.5 degree, leave summit 10-42 degree angular zone neither one Hall, also with regard to neither one control signal at stretcher, when consequently needing most power-assisted, but the motor of morpet really can not power-assisted.
In a word, this patent is the technical scheme controlling assistant mode with multiple Hall, because the turned position of pedal can only be represented with multiple Hall, multiple control signals of multiple Hall must have original error, it merges control signal and easily produces signal drift again, all can cause the distortion of power-assisted demand model, i.e. the identical power-assisted demand of different time, but obtain different power-assisted effects; Hall quantity is measured more and more, and the distortion of power-assisted demand model is more serious, has placed restrictions on your quantity, Hall small number and produce motor and run just steady, makes people by bike feel very uncomfortable, and can not get power-assisted when starting.Make it want power-assisted demand model undistorted, and want motor to operate steadily on this two problems always to attend to one thing and lose sight of another, can not get both.
International patent application WO/099/13558AI discloses the sensor controlling electrical motor on electrical motor, this sensor arranges depression on rolling disc, permanent magnets is entrapped in the depression of rolling disc, and depression size shape no-float required with permanent magnets, this point is difficult to accomplish.Be greater than permanent magnets because cave in, then rolling disc is when rotating, and permanent magnets is vibrated in the valley, very fragile permanent magnets; Depression is flush fit permanent magnets, is difficult to again permanent magnets to be entrapped in the depression of rolling disc.So, can only disposable for the permanent magnets fixed position be permanently affixed in the depression of rolling disc, make it at rolling disc when rotating, permanent magnets can not be vibrated.But it is adjustable in the depth of rolling disc that such structure has placed restrictions on permanent magnets, a sensor has been caused to only have a kind of sensing model.
Summary of the invention
The object of this invention is to provide and only obtain speed and acceleration signal by each permanent magnets on a Hall and rolling disc and sensor can have the sensitive member of multiple sensing model, a kind of can in induction region, permanent magnets quantity can be increased as far as possible, utilize rolling disc displacement information to greatest extent, the many pinpoint sensitive members again of output information.Be used on morpet, measure moment without elastic component and other machinery, power-assisted demand also can be made to mate well with the power-assisted provided, the morpet sensor sensitive member that motor operates steadily.
Design of the present invention is: a sensor can be adjusted to multiple sensing model, as long as rolling disc is connected with the mode of permanent magnets by the adjustable depth, namely connect with screw, just can under permanent magnets change locality condition, regulate permanent magnets to the magnetic induction density of Hall by regulating the depth, make Hall export different transducing signals, obtain different Controlling model.In receptive field, a rolling disc can carry out different variation patterns by multiple permanent magnets and arranges, make an one Hall can experience the motor message of whole permanent magnets at a Hall.The variation pattern mainly magnetic polarity change of multiple permanent magnets, magnetic flux change, object makes Hall can obtain the permanent magnets motor message that ad-hoc location is more accurate, controlling functions is stronger, more.The arctic, multiple permanent magnets magnetic polarity South Pole is change alternately, and the signal that Hall is produced is square wave, and controlling functions is stronger, more; The position that the signal that multiple permanent magnets magnetic flux change makes Hall produce can express permanent magnets is more accurate, thus can express the state of kinematic motion of ad-hoc location.For morpet, it is extremely important at what state of kinematic motion for expressing the ad-hoc location of stretcher, because the state of kinematic motion direct representation of the stretcher power-assisted need state of people to car.
Structure of the present invention is:
The rotating disc type sensitive member of many magnetic patch uneven distribution magnetic flow, comprise one piece of rolling disc 1 and multiple permanent magnets 2, it is characterized in that: rolling disc 1 is fixedly installed multiple permanent magnets 2, the rounded track distribution equably of the plurality of permanent magnets 2, the distance namely between each permanent magnets 2, adjacent permanent magnet block 2 identical to the distance at circle center, circular rail trace 5 place is identical; In certain one side of rolling disc 1, the magnetic polarity of adjacent permanent magnet block 2 is contrary, and namely the magnetic polarity distribution mode of the upper whole permanent magnets 2 of certain one side of rolling disc 1 is N pole, S pole, N pole, S pole, N pole, S pole Have at least the magnetic flow of two permanent magnets 2 not identical, and have at least a permanent magnets 2 and the hole on rolling disc 1 to be with being threaded;
Also comprise a Hall 3, Hall 3 is positioned at certain one side of rolling disc 1, and Hall 3 is located at close to permanent magnets 2 and can experiences the position of permanent magnets 2 magnetic flow, has spacing between Hall 3 and permanent magnets 2; Hall 3 is Halls opposite magnetic polarities being produced to square wave output signal.
Rolling disc 1 can be the on-deformable plate of material such as plastic flagstone, the exhausted plate of high strength, copper coin, aluminium sheet.When using sensitive member, rolling disc 1 will rotate, and the center of rotation is exactly the center of multiple permanent magnets 2 one-tenth annular arrangement distribution place circle.
The object of multiple permanent magnets 2 one-tenth annular arrangement distribution is the state of kinematic motion only can experiencing whole permanent magnets 2 on rolling disc with a Hall 3, namely movement position and the speed of whole permanent magnets 2 on rolling disc is experienced, and the change of speed, or title acceleration/accel, this Hall 3 just can be expressed the state of kinematic motion of a permanent magnets 2 continuous print electric signal, again because whole permanent magnets 2 is separately fixed on rolling disc and rolling disc 1, then the continuous electric signal that Hall 3 produces just can express the state of kinematic motion of rolling disc.If this continuous electric signal for controlling other object, this continuous electric signal is exactly control signal.If for the motor controlling morpet, also need with micro controller system or other electron component as sensing signal processor, position in control signal, speed, acceleration/accel key element are converted to the power-assisted signal needing power-assisted how many, the function converted is exactly power-assisted demand model, or claims power-assisted model.
The meaning that multiple permanent magnets 2 magnetic flow is not identical is: be not duplicate impulse singla in the electric signal that Hall 3 is produced, but the impulse singla that peak valley difference is different, distinguish the diverse location of different permanent magnets 2 with distinguishing impulse singla, thus the state of kinematic motion of diverse location permanent magnets 2 can be obtained.Reaching can certain position of accurate expression rolling disc, or each state of kinematic motion having permanent magnets 2.As for morpet, can ride in the demand of diverse location to power-assisted by accurate expression, make the expression of power-assisted demand more accurate, then car is just more consistent with the cooperation of people.
The magnetic flow of the not identical namely multiple permanent magnets 2 of multiple permanent magnets 2 magnetic flow is vicissitudinous, the scope of its change should be the sensitive magnetic flow scope of same Hall 3 of invariant position, that is, the peak of multiple permanent magnets 2 magnetic flow and minimum should within the scope of the sensitive magnetic flow of Hall 3.
Hall 3 is located at close to permanent magnets 2 and can experiences the position of permanent magnets 2 magnetic flow, and object is the state of kinematic motion experiencing permanent magnets 2 with Hall 3, i.e. movement position, speed, acceleration/accel.
The control initial point meaning be threaded: Hall 3 will experience the movement position of rolling disc 1, Hall 3 just necessarily has waveform to distinguish, identical in many pieces of permanent magnets 2 size, shape is identical, magnetic flow is identical, under the condition that rounded track distributes equably, Hall 3 will obtain waveform difference, namely Hall 3 will obtain distinguishing waveform, only has the distance regulating permanent magnets 2 and Hall 3, the same permanent magnets 2 of Hall 3 pairs of same positions is made to obtain different magnetic flow, thus acquisition is different waveforms before and after regulating, this different waveform is different from the waveform of other permanent magnets 2, make its this different waveform that Hall 3 can be made to experience the movement position of rolling disc 1.Permanent magnets 2 and rolling disc 1 are the distances that just can regulate permanent magnets 2 and Hall 3 with being threaded, so this structure can make Hall 3 experience the movement position of rolling disc 1.This Hall 3 signal having position mark, can provide control initial point, and the control signal not having waveform to distinguish can not provide control initial point as control signal.
The regulable control mode be threaded has following four kinds at least:
The first, permanent magnets 2 is goed deep into position adjustments to annular groove rolling disc 1, make it away from Hall 3, Hall 3 receive this point magnetic flow reduce, the signal corresponding to the output of this point reduces;
The second, permanent magnets 2 is regulated to the shallow out position of annular groove rolling disc 1, make it close to Hall 3, the magnetic flow that Hall 3 receives this point strengthens, and the signal corresponding to the output of this point increases;
The third, permanent magnets 2 is taken out annular groove rolling disc 1, make this position not have permanent magnets 2, the magnetic flow that Hall 3 receives this point is zero, and the signal corresponding to the output of this point is zero;
4th kind, permanent magnets 2 is taken out annular groove rolling disc 1 after, permanent magnets 2 South Pole of this taking-up and the arctic reverse rotate in original annular groove rolling disc 1 hole again, make the permanent magnets 2 of this position identical with the magnetic pole of adjacent two permanent magnets 2, Hall 3 receives three identical magnetic poles continuously near this point, and Hall 3 exports the wide ripple signal that three equidirectional waveforms merge.
The regulable control mode meaning be threaded: namely regulable control modeling sense is identical at each parts of sensitive member, under the condition that namely each parts portion does not change, at different time, Hall 3 can export different waveform signals, produces different Controlling model.If this sensitive member is arranged on a morpet, then can be implemented on level road rides with a power-assisted model, time riding in hill path, as long as permanent magnets 2 is deeply regulated away from Hall 3 to rolling disc 1, Hall 3 can export again another sample waveform signal, thus this waveform signal makes again electrical motor produce another power-assisted model being suitable for riding in hill path to morpet.Due to regulate permanent magnets 2 to rolling disc 1 deeply or shallow go out very convenient, so, regulate Hall 3 to export different waveform signals also very convenient, regulate morpet to be that the different road conditions such as level road or hill path are carried out power-assisted and ridden very convenient.
The magnetic polarity of adjacent permanent magnet block 2 is very important technical characteristic on the contrary, the magnetic polarity distribution mode of whole permanent magnets 2 is N pole, S pole, N pole, S pole, N pole, S pole ... Hall 3 is made to export high and low alternate square-wave signal, as the rolling disc that limited size is stopped, rotating and within one week, will obtain as far as possible many accurate variable signals, should be select square wave certainly.Because the time of the peak-to-valley value change of square-wave signal is short, within the regular hour, as far as possible many signals having control meaning can be produced.The structure that the magnetic polarity of adjacent permanent magnet block 2 is contrary produces square wave, and the structure generation sinusoidal waveform that the magnetic polarity of adjacent permanent magnet block 2 is identical, during especially for morpet, it is 10-15 centimetre that rolling disc as sensing element is generally placed restrictions at diameter, the signal of controlling functions will be obtained in this limit scope, rotate one week, produce more than the available pulse number of generation sinusoidal waveform 7-9 times of square wave.Nature, to the control effects of morpet more, people coordinates with car better, and rider people feels more comfortable for the magnetic polarity of adjacent permanent magnet block 2 contrary structure.
Hall 3 is located at just to the position of the circular rail trace 5 of multiple permanent magnets 2.Because Hall 3 spacing can be had to experience permanent magnets 2 magnetic flow and exports the parts of electric signal, again in order to reduce the volume of permanent magnets 2 as far as possible, making it that as far as possible many on rolling disc 1 permanent magnets 2 is set, the permanent magnets 2 as far as possible reduced can be responded to by Hall 3; Hall 3 should be located at just to the position of the circular rail trace 5 of multiple permanent magnets 2, can run through the position of the circular rail trace of whole permanent magnets 2.
Described permanent magnets 2 and rolling disc 1 are also provided with the connecting element of fixing permanent magnets 2 and rolling disc 1 relative position with screw connection point.Permanent magnets 2 is regulated deeply or shallow go out after rolling disc 1, should permanent magnets 2 position after secured adjusted, so permanent magnets 2 position after regulating is fixed with connecting element.Connecting element can select the modes such as rubber cushion, spring chair or nut 6.Make its same sensitive member, multiple electric signal model can easily be adjusted to and export.
Preferred connecting element is the nut 6 in permanent magnets 2.By the shredded meat number of turns of nut 6, easily with the naked eye judge permanent magnets 2 regulate deeply or shallow go out the size of rolling disc 1, be suitable for more extensive, anyone all operable permanent magnets 2 control method.
Rolling disc 1 is provided with centre hole in the circle scope of circular rail trace 5 place of multiple permanent magnets 2.If rolling disc 1 will be set on a turning cylinder and use, rolling disc 1 will be established a hole wearing turning cylinder; For ensureing that rolling disc 1 is when rotating with turning cylinder, Hall 3 can experience the motor message of each permanent magnets 2 on rolling disc 1, then the center of scope is justified, i.e. centre hole in circular rail trace 5 place that hole should be located at multiple permanent magnets 2 that wears on rolling disc 1.That is, centre hole is not necessarily circular, can be the shapes such as square, triangle, can be nested with the turning cylinder of the shapes such as square, triangle, but the interior sky of centre hole necessarily comprises the center of circular rail trace 5 place circle, and a Hall 3 could be used to experience the motor message of whole permanent magnets 2 on rolling disc 1 rolling disc.
The magnetic flow of a permanent magnets 2 is had at least to be not equal to the magnetic flow of other any one permanent magnets 2.Be not equal to other magnetic flow, namely special values of magnetic flux can be used for the position representing bicycle pedal.Preferably have at least the magnetic flow of two each and every one permanent magnets 2 to be not equal to the magnetic flow of other any one permanent magnets 2, the permanent magnets 2 of these two special values of magnetic fluxes corresponds respectively to two stretchers, for representing the position of bicycle two stretchers.Because the circular movement of bicycle pedal, judge that pedal position is for the speed obtaining this circular movement, determines that the power-assisted model of circular movement is next time extremely important.
Rolling disc 1 be the plastic flagstone of non-magnet_conductible material, aluminum board, copper material plate a certain.Because the present invention is the structure that the magnetic polarity of adjacent permanent magnet block 2 is contrary, the edge of adjacent permanent magnet block 2 can be made almost can be affixed Hall 3 also can be made to export the electric signal having controlling functions.The plastic flagstone of the most handy non-magnet_conductible material, aluminum board, copper material plate, or other on-deformable rolling disc.
Advantage of the present invention: structure is simple, cost is low, permanent magnets quantity on permanent magnets ring is not placed restrictions on, not at the impulse singla of the exportable standard in permanent magnets position of adjustable magnetic flux, there is no signal blind zone, only by the total movement state of one group of output signal of a Hall just energy perfect representation Moving plate, output signal can not drift about in distortion, fixed position, place is represented by the magnetic flux change of permanent magnets, the movement position of each permanent magnets can be had in output signal, for morpet, power-assisted is exported highly to coordinate with power-assisted demand and cyclist is felt well.
［ 1 ］ model of adjustable Hall output signal: the permanent magnets of adjustable magnetic flux can have deeply on rolling disc, shallow go out, take out and four kinds of modes such as to depart from, magnetic pole oppositely screws in and be connected with rolling disc, namely four kinds of modes are had to regulate Hall to export the model of electric signal, make its same sensitive member, the model that can easily be adjusted to other four kinds of electric signal exports.Signal model changes, and different signal models just can be selected to control, by control object, to realize personalized control.As for morpet, can according to the strength of different people, or the custom of exerting oneself, ride over Plain or mountain region and select the signal model that is applicable to, namely there is the function carrying out regulating power-assisted at any time by personalization.
［ 2 ］ structure is simple, without elastic component, mechanical fault: experience multiple permanent magnets with Hall and rotate output signal, the speed provided with Chinese patent 01201843.0 can calculate the principle of moment, available multiple math modeling calculates the moment parameter of morpet, for controlling the motor of morpet, realize power-assisted., cost simple without elastic component, structure is lower than with elastic component and mechanically stressed sensor.After avoiding long-time use, the problem that each mechanical part distortion, mechanical fault, cooperation are not good.
［ 3 ］ magnetic polarity is contrary, export square-wave signal, there is accurate controlling functions: because the magnetic polarity of adjacent permanent magnet block is contrary, and Hall selects Hall opposite magnetic polarities being produced to square wave output signal, then no matter spacing is how many for adjacent permanent magnet block, even if very close to each other between adjacent permanent magnet block, Hall can export square-wave signal too.As for morpet, the motor controlling morpet with the output signal of square wave is better than with sinusoidal waveform, because rectangle wave energy accomplishes signal point at any time, represent that the signal implication of movement position and speed is accurate, thus can the movement position of Precise Representation booster bicycle pedal and speed, to go out the correct power-assisted demand of this state of kinematic motion with the accurate position of pedal and speed calculation.
［ 4 ］ magnetic polarity of adjacent permanent magnet block is contrary, permanent magnets quantity is not placed restrictions on, sensing point position can be increased: because magnetic polarity is contrary as far as possible, export square-wave signal, even if adjacent permanent magnet block gapless, its signal exported has remained number, differentiable square-wave signal, still has controlling functions, that is can not export the unchanged linear signal not having controlling functions.As for morpet, owing to being placed restrictions on the rolling disc diameter of pedal linkage, just can on the rolling disc of prescribed level, increase permanent magnets quantity as far as possible, increase sensing point position as far as possible, represent bicycle pedal movement position and speed, Precise Representation state of kinematic motion with as far as possible many transducing signals.
［ 5 ］ magnetic polarity of adjacent permanent magnet block is contrary, can arrange that permanent magnets is many, sensing point position is many, the state of kinematic motion of rolling disc is represented accurate: to for morpet, the rolling disc size of fixing permanent magnets is strictly placed restrictions on, general rolling disc diameter can only within 10-15 centimetre, in order to the magnetic-pole signals making Hall obtain permanent magnets under the condition having spacing, the diameter of its permanent magnets is at least Ф 0.6-0.8 centimetre, then the periphery of rolling disc of diameter 10-15 centimetre is zero-lash arranges 35-73 permanent magnets ［ 10-1*3.14/0.8=35; 15-1*3.14/0.6=73 ］, namely stretcher circles, and Hall can obtain 35-73 signal for controlling the motor of morpet.But if the prior art that adjacent permanent magnet block magnetic polarity is identical, adjacent permanent magnet block by 5 centimetres of spacing, then, on diameter 10-15 centimetre rolling disc, can only arrange at most 5-8 permanent magnets ［ 10-1*3.14/5.8=5; 15-1*3.14/5.6=8 ］.Visible, the art of this patent can arrange permanent magnets 7-9 doubly ［ 35/5=6 than prior art more; 73/8=9 ］, 30-65 permanent magnets ［ 35-5=30 is set more; 73-8=65 ］.So rolling disc circles, the art of this patent adds 7-9 turn disc site signal doubly than prior art.7-9 is improve naturally doubly to the electric machine control accuracy rate of morpet, cyclist is made to also improve 7-9 doubly to power-assisted demand accuracy rate, the cooperate degree of car and people improves greatly, and the comfort of cyclist increases greatly, is no longer that fast slow uncomfortable sensation of boosted vehicle of prior art.The present invention asks someone according to the experience of reality, when rolling disc being arranged roughly uniformly 15 permanent magnets, essentially eliminating prior art and only establishing 5-8 permanent magnets to make that fast slow uncomfortable sensation of boosted vehicle; When rolling disc being arranged roughly uniformly 20 permanent magnets, car coordinates oneself to meet human needs with people's, and the sensation of riding boosted vehicle is very comfortable.
［ 6 ］ do not have signal blind zone, power-assisted demand whenever all can obtain the power-assisted matched: this patent can arrange at most 35-73 permanent magnets at the rolling disc periphery of diameter 10-15 centimetre, and between each permanent magnets, average angle is 5-10 degree.For morpet, when starting or run, stretcher is from the 35 degree of regions leaving 10-45 degree angle, summit, the position that 4-7 permanent magnets is leaving 10 degree of angles, summit is had just to have a signal, the then exportable 4-7 of Hall control signal reaction power-assisted demand, can realize any position, have power-assisted just can obtain the excellent technique effect of corresponding power-assisted any time, make the no-float of car and people, cyclist feels laborsaving comfortable again.
［ 7 ］ only with a Hall, a control signal represents the total movement state of rolling disc, the state of kinematic motion of control signal and rolling disc is completely the same, control signal and Man's Demands completely the same: multiple permanent magnets is fixed on rolling disc, permanent magnets and rolling disc synchronous axial system, whole permanent magnets motor messages is experienced with a Hall, then the control signal that exports of Hall and the state of kinematic motion of rolling disc completely the same, just completely the same with Man's Demands, control signal does not have original segment error and signal drift problem yet.Even if hall sensing parameter changes, be also that whole control signal moves in parallel, as long as the range of receiving receiving the electric machine controller of Hall control signal is wider, the control effects of the Hall control signal changed becomes systematicness to change.As for morpet, power-assisted demand model can not distortion, and power-assisted exports the matching relationship still keeping original model with power-assisted demand, and the systematicness that cyclist is easy to grasp this power-assisted ability changes.
［ 8 ］ magnetic flow of each permanent magnets changes, the vicissitudinous permanent magnets of magnetic flow can represent the state of kinematic motion of specific site: because the magnetic flow of each permanent magnets changes, each permanent magnets makes Hall export the control signal of peculiar peak valley difference waveform, then the control signal of peculiar peak valley difference waveform just can the state of kinematic motion in a certain fixing permanent magnets site of direct representation rolling disc; As each permanent magnets has the given magnetic flux of oneself, can reach and have how many permanent magnets, just can obtain the motion state signal of how many specific sites.As for morpet, rolling disc diameter is within 10-15 centimetre, and rolling disc circles, and Hall can obtain the control signal of 35-73 different loci state of kinematic motion, naturally knows the power-assisted demand in 35-73 site.Clearly, rolling disc circles, and prior art can only have at most 5-8 power-assisted demand, be nothing like the maximum available 35-73 of a this patent power-assisted desired signal more can truly, react the power-assisted demand of cyclist multiple data quantity.That is, morpet the art of this patent, Che Gengneng matches consistent with people's demand, and cyclist experiences stretcher at any turned position, and oneself all completely can regulation speed, and traveling comfort is good.And the morpet of prior art can only could can regulation speed at maximum 5-8 turned position.
Accompanying drawing explanation
Fig. 1 is many magnetic patch uneven distribution magnetic flow on rolling disc, and the sensitive member structural representation that adjacent permanent magnets N-S replaces, in figure, permanent magnets line weight difference represents that magnetic flow is different;
Fig. 2 is many magnetic patch uneven distribution magnetic flow on rolling disc, and the sensitive member structural representation that highdensity adjacent permanent magnets becomes N-S to replace, in figure, permanent magnets line weight difference represents that magnetic flow is different;
Fig. 3 is cross-sectional view of the present invention;
Fig. 4 is that two permanent magnets of Fig. 3 are conditioned, the cross-sectional view after one of them permanent magnets is removed;
Fig. 5 is that two permanent magnets of Fig. 3 are by the cross-sectional view regulated respectively to different directions.
In figure, 1 be rolling disc, 2 are permanent magnets, 3 are Halls, 5 are circular rail traces, 6 is nuts.
Detailed description of the invention
The rotating disc type sensitive member of embodiment 1, many magnetic patch uneven distribution magnetic flow
As Fig. 1,3,4,5, be fixedly installed 20 permanent magnets 2 with on highstrenghtpiston's injection molded diameter 10.0 centimetres of rolling discs 1.
The rounded track distribution equably of whole permanent magnets 2, each permanent magnets 2 is fixed on diameter 9.0 centimetres of circular rail traces 5, and the distance namely between each permanent magnets 2, adjacent permanent magnet block 2 identical to the distance at circle center, circular rail trace 5 place is identical.The magnetic flow of permanent magnets 2 is 146---279 (BH) max/KJm
-3selective values different in scope, and the magnetic flow of adjacent permanent magnets 2 is unequal.Two permanent magnets 2 and the hole on rolling disc 1 is had to be with being threaded; Permanent magnets 2 is protruded with nut 6 on the post outside rolling disc 1, and the screw thread in nut 6 and rolling disc 1 hole is firmly fixed permanent magnets 2.When regulating the depth of permanent magnets 2 and rolling disc 1 or take out, first rotate and ease out nut 6, the depth of rear adjustment permanent magnets 2 and rolling disc 1, finally screw with nut 6 again on permanent magnets 2 protrudes outside rolling disc 1 post.
Rolling disc 1 regulates the depth of permanent magnets 2 as Fig. 5, or on rolling disc 1, regulate permanent magnets 2 to take out as Fig. 4.
The magnetic flow of two permanent magnets 2 is had to be not equal to the magnetic flow of other any one permanent magnets 2, and the magnetic flow of these two permanent magnets 2 is also unequal, the position of these two permanent magnets 2 is just in time at the two ends of a diameter of rolling disc 1, and these two permanent magnets 2 for representing the movement position of two stretchers on morpet.
The mode that the magnetic polarity of the whole permanent magnets 2 one-tenth adjacent permanent magnet blocks 2 arranged in face of rolling disc 1 is contrary arranges, i.e. on a face of rolling disc 1, all the magnetic polarity distribution mode of permanent magnets 2 is N pole, S pole, N pole, S pole, N pole, S pole ...
The side that rolling disc 1 has permanent magnets 2 is located at a Hall 3, Hall 3 is located at the position close to permanent magnets 2, namely Hall 3 is located in circular rail trace 5 scope of each permanent magnets 2 place, Hall 3 keeps the spacing distance of 0.3 centimetre with each permanent magnets 2 of rotary state, make each permanent magnets 2 of rotation when through Hall 3, Hall 3 can produce a corresponding square wave electric signal output.
The regulable control mode be threaded has following four kinds at least:
The first, permanent magnets 2 is goed deep into position adjustments to annular groove rolling disc 1, make it away from Hall 3, Hall 3 receive this point magnetic flow reduce, the signal corresponding to the output of this point reduces;
The second, permanent magnets 2 is regulated to the shallow out position of annular groove rolling disc 1, make it close to Hall 3, the magnetic flow that Hall 3 receives this point strengthens, and the signal corresponding to the output of this point increases;
The third, permanent magnets 2 is taken out annular groove rolling disc 1, make this position not have permanent magnets 2, the magnetic flow that Hall 3 receives this point is zero, and the signal corresponding to the output of this point is zero;
4th kind, permanent magnets 2 is taken out annular groove rolling disc 1 after, permanent magnets 2 South Pole of this taking-up and the arctic reverse rotate in original annular groove rolling disc 1 hole again, make the permanent magnets 2 of this position identical with the magnetic pole of adjacent two permanent magnets 2, Hall 3 receives three identical magnetic poles continuously near this point, and Hall 3 exports the wide ripple signal that three equidirectional waveforms merge.
Rolling disc 1 is provided with centre hole at this circular rail trace 5 center, whole permanent magnets 2 place, and centre hole is used on the pedal axis that is enclosed within morpet or runner rotating shaft.
The rotating disc type sensitive member of embodiment 2, high density many magnetic patch uneven distribution magnetic flow
As Fig. 2,3,4,5, a face of the High-strength aluminum product rolling disc 1 of one piece of diameter 10.0 centimetres arranges 40 permanent magnets 2 of diameter 0.4-0.6 centimetre.The magnetic flow of permanent magnets 2 is 146---279 (BH) max/KJm
-3selective values different in scope, and the magnetic flow of adjacent permanent magnets 2 is unequal, Hall 3 keeps the spacing distance of 0.2 centimetre with each permanent magnets 2 of rotary state, makes each permanent magnets 2 of rotation when through Hall 3, and Hall 3 can produce a corresponding square wave electric signal output.The structure of other rolling disc 1, permanent magnets 2, Hall 3 is same as embodiment 1.
Claims (7)
1. the rotating disc type sensitive member of more than magnetic patch uneven distribution magnetic flow, comprise one piece of rolling disc (1) and multiple permanent magnets (2), it is characterized in that: rolling disc (1) is fixedly installed multiple permanent magnets (2), the plurality of permanent magnets (2) rounded track distribution equably, the distance namely between each permanent magnets (2), adjacent permanent magnet block (2) identical to the distance at circle center, circular rail trace (5) place is identical; In certain one side of rolling disc (1), the magnetic polarity of adjacent permanent magnet block (2) is contrary, and namely the magnetic polarity distribution mode of the upper whole permanent magnets (2) of certain one side of rolling disc (1) is N pole, S pole, N pole, S pole, N pole, S pole Have at least the magnetic flow of two permanent magnets (2) not identical; And have at least a permanent magnets (2) to be with being threaded with the hole on rolling disc (1);
Also comprise a Hall (3), Hall (3) is positioned at certain one side of rolling disc (1), and Hall (3) is located at close to permanent magnets (2) and can experiences the position of permanent magnets (2) magnetic flow, has spacing between Hall (3) and permanent magnets (2); Hall (3) is Hall opposite magnetic polarities being produced to square wave output signal;
The peak of multiple permanent magnets (2) magnetic flow and minimum are within the scope of Hall (3) sensitive magnetic flow; Permanent magnets (2) and rolling disc (1) just to regulate permanent magnets (2) and the distance of Hall (3), and Hall (3) can be made to experience the movement position of rolling disc (1);
Described rolling disc (1) is annular groove rolling disc (1); The described regulable control mode be threaded has following four kinds at least:
The first, permanent magnets (2) is goed deep into position adjustments to annular groove rolling disc (1), make it away from Hall (3), the magnetic flow that Hall (3) receives this point reduces, and the signal corresponding to output herein reduces;
The second, permanent magnets (2) is regulated to the shallow out position of annular groove rolling disc (1), make it close to Hall (3), the magnetic flow that Hall (3) receives this point strengthens, and the signal corresponding to output herein increases;
The third, permanent magnets (2) is taken out annular groove rolling disc (1), make this position not have permanent magnets (2), the magnetic flow that Hall (3) receives this point is zero, and the signal corresponding to output is herein zero;
4th kind, permanent magnets (2) is taken out annular groove rolling disc (1) after, the permanent magnets of this taking-up (2) South Pole and the arctic reverse rotate in original annular groove rolling disc (1) hole again, make the permanent magnets of this position (2) identical with the magnetic pole of adjacent two permanent magnets (2), Hall (3) herein near receive three identical magnetic poles continuously, Hall (3) exports the wide ripple signal that three equidirectional waveforms merge.
2. the rotating disc type sensitive member of many magnetic patch uneven distribution magnetic flow according to claim 1, is characterized in that: described permanent magnets (2) and rolling disc (1) screw connection point are also provided with the connecting element of fixing permanent magnets (2) and rolling disc (1) relative position.
3. the rotating disc type sensitive member of many magnetic patch uneven distribution magnetic flow according to claim 2, is characterized in that: described connecting element is the colloid that oneself solidifies, or the nut (6) in permanent magnets (2).
4. the rotating disc type sensitive member of many magnetic patch uneven distribution magnetic flow according to claim 3, is characterized in that: Hall (3) is located at just to the position of the circular rail trace (5) of multiple permanent magnets (2).
5. the rotating disc type sensitive member of many magnetic patch uneven distribution magnetic flow according to claim 4, is characterized in that: rolling disc (1) is provided with centre hole in the circle scope of circular rail trace (5) place of multiple permanent magnets (2).
6., according to the rotating disc type sensitive member of the many magnetic patch uneven distribution magnetic flow of claim 1 or 2 or 3 or 4 or 5 described in any one, it is characterized in that: have at least the magnetic flow of a permanent magnets (2) to be not equal to the magnetic flow of other any one permanent magnets (2).
7. the rotating disc type sensitive member of many magnetic patch uneven distribution magnetic flow according to claim 6, is characterized in that: rolling disc (1) be the plastic flagstone of non-magnet_conductible material, aluminum board, copper material plate a certain.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310309348.4A CN103381870B (en) | 2012-07-28 | 2013-07-23 | Rotary disc type sensing element with multiple magnets and unevenly distributed magnetic fluxes |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102635221A CN102826181A (en) | 2012-07-28 | 2012-07-28 | Turntable sensing element with unevenly distributed magnetic fluxes of magnetic blocks |
| CN201210263522.1 | 2012-07-28 | ||
| CN2012102635221 | 2012-07-28 | ||
| CN201310309348.4A CN103381870B (en) | 2012-07-28 | 2013-07-23 | Rotary disc type sensing element with multiple magnets and unevenly distributed magnetic fluxes |
Publications (2)
| Publication Number | Publication Date |
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| CN103381870A CN103381870A (en) | 2013-11-06 |
| CN103381870B true CN103381870B (en) | 2015-06-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012102635221A Pending CN102826181A (en) | 2012-07-28 | 2012-07-28 | Turntable sensing element with unevenly distributed magnetic fluxes of magnetic blocks |
| CN201320437933.8U Expired - Fee Related CN203381759U (en) | 2012-07-28 | 2013-07-23 | Rotating disc type sensing element with multiple magnet blocks and non-uniformly distributed magnetic flux |
| CN201310309348.4A Expired - Fee Related CN103381870B (en) | 2012-07-28 | 2013-07-23 | Rotary disc type sensing element with multiple magnets and unevenly distributed magnetic fluxes |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012102635221A Pending CN102826181A (en) | 2012-07-28 | 2012-07-28 | Turntable sensing element with unevenly distributed magnetic fluxes of magnetic blocks |
| CN201320437933.8U Expired - Fee Related CN203381759U (en) | 2012-07-28 | 2013-07-23 | Rotating disc type sensing element with multiple magnet blocks and non-uniformly distributed magnetic flux |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102826181A (en) * | 2012-07-28 | 2012-12-19 | 成都宽和科技有限责任公司 | Turntable sensing element with unevenly distributed magnetic fluxes of magnetic blocks |
| CN104199248B (en) * | 2014-08-29 | 2016-11-30 | 苏州佳世达光电有限公司 | A kind of scialyscope |
| CN111900961A (en) * | 2020-08-24 | 2020-11-06 | 国网山东省电力公司滨州市沾化区供电公司 | Waveform signal generator |
| CN113359946B (en) * | 2021-06-29 | 2022-11-11 | 歌尔科技有限公司 | Rotation control component, method and device and electronic equipment |
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| CN102303682A (en) * | 2011-05-16 | 2012-01-04 | 无锡尚格工业设计有限公司 | Structure of electric power sensor matched with rear fork of bicycle |
| CN202225989U (en) * | 2011-08-23 | 2012-05-23 | 杨文彬 | Electric bicycle middle shaft with power assisting sensor device |
| CN203381759U (en) * | 2012-07-28 | 2014-01-08 | 成都宽和科技有限责任公司 | Rotating disc type sensing element with multiple magnet blocks and non-uniformly distributed magnetic flux |
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| AUPO899797A0 (en) * | 1997-09-05 | 1997-10-02 | Southern Refrigeration Group Pty Ltd | An electric motor |
| US6469499B2 (en) * | 2001-02-06 | 2002-10-22 | Delphi Technologies, Inc. | Apparatus and method for low power position sensing systems |
| US7208939B2 (en) * | 2001-02-28 | 2007-04-24 | Bvr Technologies Co. | Methods and apparatus for sensing angular position and speed of a rotatable shaft utilizing linearized annular magnet and commutated ratiometric hall sensors |
| CN2640915Y (en) * | 2003-06-23 | 2004-09-15 | 王乃康 | Timing sensor of electric boosting bicycle |
| CN201387335Y (en) * | 2009-04-01 | 2010-01-20 | 邱召运 | Hall rotary encoder |
| CN202243922U (en) * | 2011-09-30 | 2012-05-30 | 捷奥比电动车有限公司 | Sensing device for electric vehicle and electric vehicle with sensing device |
| CN202783674U (en) * | 2012-07-28 | 2013-03-13 | 成都宽和科技有限责任公司 | Rotating disc type sensing element with a plurality of magnetic blocks uneven in magnetic flux distribution |
-
2012
- 2012-07-28 CN CN2012102635221A patent/CN102826181A/en active Pending
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2013
- 2013-07-23 CN CN201320437933.8U patent/CN203381759U/en not_active Expired - Fee Related
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102303682A (en) * | 2011-05-16 | 2012-01-04 | 无锡尚格工业设计有限公司 | Structure of electric power sensor matched with rear fork of bicycle |
| CN202225989U (en) * | 2011-08-23 | 2012-05-23 | 杨文彬 | Electric bicycle middle shaft with power assisting sensor device |
| CN203381759U (en) * | 2012-07-28 | 2014-01-08 | 成都宽和科技有限责任公司 | Rotating disc type sensing element with multiple magnet blocks and non-uniformly distributed magnetic flux |
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|---|---|
| CN203381759U (en) | 2014-01-08 |
| CN102826181A (en) | 2012-12-19 |
| CN103381870A (en) | 2013-11-06 |
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Effective date of registration: 20171124 Address after: No. 52, Xiao Zhong house, Nanping Road, tower peak Town, Lanshan County, Yongzhou, Hunan Patentee after: Hunan double tribe information consulting service limited liability company Address before: 610000, Sichuan District, Longquanyi City, Chengdu District Street, Jackie Chan Road, paragraph two, No. 888, Chengdu open area A10 (building) 3, No. 301 Co-patentee before: Huang Qiang Patentee before: Chengdu Kind Technology Co., Ltd. Co-patentee before: Gao Song Co-patentee before: Ouyang Yanxiong |
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