CN202783630U - Sensing element with non-uniformly distributed magnets and fluxes in shell - Google Patents
Sensing element with non-uniformly distributed magnets and fluxes in shell Download PDFInfo
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- CN202783630U CN202783630U CN 201220367957 CN201220367957U CN202783630U CN 202783630 U CN202783630 U CN 202783630U CN 201220367957 CN201220367957 CN 201220367957 CN 201220367957 U CN201220367957 U CN 201220367957U CN 202783630 U CN202783630 U CN 202783630U
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Abstract
The utility model relates to a sensing element with non-uniformly distributed magnets and fluxes in a shell and belongs to technology providing control signals by multi-spot magnetic induction. Permanent magnets and a hall element are disposed in a cavity formed by embedding a rotating disk and a fixed disk. A plurality of permanent magnets distributed in a circle are fixed on the rotating disk and are different in spacing and flux. On one surface of the rotating disk, the adjacent ones of the permanent magnets are opposite in magnetic polarity, namely the polarities of the permanent magnets on one surface of the rotating disk are distributed in such manner: N pole, S pole, N pole and the like. The hall element on the fixed disk is close to the permanent magnets. The sensing element with non-uniformly distributed magnets and fluxes in the shell has the advantages that the opposite polarity distribution manner of N and S for the adjacent permanent magnets enables the hall element to acquire square-wave signals and facilitates digital processing of the signals; the different spacing and fluxes allow the square-wave signals to indicate the positions of the permanent magnets on the rotating disk so as to determine purposes of different square waves; and the permanent magnets and the hall element are relatively fixed so that signal output is reliable.
Description
Technical field
The utility model belongs to the technical field that magnetic induction provides signal, particularly relates on rotatable parts, carries out the technology that multi-point magnetic induction provides control signal.
Background technology
The Chinese patent 201020295192.0 " colluding pawl formula moment sensor " of Yebao Vehicle Material Industry's application discloses a kind of morpet sensing device, sensing device comprises that magnetic part and elastic component cooperate, and experience the sensing device of moment.After period of service was long, the elasticity modulus variation of elastic component will cause the control effect of transducing signal and controlled motor to change, and the power-assisted effect becomes and need to mismatch with people's power-assisted.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, the no touch detection is pedaled power, speed and is turned to, this device is established respectively magnetic sheet on the inside and outside wheel disc of relative motion, on the interior wheel disc spring is arranged, use spring reset between the inside and outside wheel disc, survey electric signal that the magnetic sheet of relative motion on the inside and outside wheel disc produces with two Halls on the support and represent to pedal power, speed and turn to.
Shortcoming (1) is not durable with elastic component: after period of service was long, the elasticity modulus variation of elastic component will cause the control effect of transducing signal and controlled motor to change, and the power-assisted effect becomes and need to mismatch with people's power-assisted, complex structure, and cost is high.
Each magnetic sheet group of shortcoming (2) is identical and the magnetic pole set-up mode is all identical, and can not represent the separately position of different magnetic sheet groups, can not express the special power-assisted demand of diverse location: from Fig. 3 of 01201843.0 patent, 4,5,6 and the record explanation of the 2nd section of Instructions Page 2, each magnetic sheet group (comprises a magnetic sheet 4, a magnetic sheet 5, a magnetic sheet 6) magnetic pole set-up mode is all identical, namely only be simply from being provided with again identical magnetic sheet group at interior diverse location of taking turns, the separately position that can not represent different magnetic sheet groups, the state of kinematic motion that can not represent ad-hoc location, and the people is by bike the time, pedal and each position corresponding with pedal are at state of kinematic motion, own special power-assisted demand is arranged, but the identical structure of this each magnetic sheet group of this patent can not give expression to the special power-assisted demand of each diverse location on the pedal.
Each site signal indifference of shortcoming (3) 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 the wheel, the signal that Hall is exported can not represent the position of stretcher and other magnetic sheet group, the signal that is Hall output can not represent that different foot positions are to the demand of power-assisted, cause the demand of power-assisted and provide the time of power-assisted to mismatch, namely man-machine cooperation is undesirable.
Shortcoming (4) sine wave output makes the magnetic sheet group Edge Distance can not be less than 4 centimetres, generally take 5 centimetres as good, can establish magnetic sheet group number very little and make, man-machine cooperation is undesirable: each magnetic sheet group is identical, then Hall output is that sinusoidal waveform is as control signal, as the control signal sinusoidal waveform certain peak valley difference must be arranged, because the magnetic sheet group of this patent needs certain-length to represent forward and reverse motion, be to establish at most 8 magnetic sheet groups on 20 centimetres the annular groove rolling disc circular trace at diameter, generally take 5 as good, Hall just can have the sine wave signal of control function.That is to say that this technical scheme of 01201843.0 patent is used for morpet, magnetic sheet group limited amount is ended in 8, control signal very little, man-machine cooperation is undesirable.If but more than 8 magnetic sheet groups, when people's treadmill was very fast, the signal graph of Hall output was close to a horizon, this signal is not controlled function, can not control electrical motor, when making it need power-assisted especially, loses assist function.
Shortcoming (5) signal blind zone reaches miter angle, really can not get power-assisted when needing power-assisted during startup: well-known, it is minimum in summit moment that the people steps on bicycle pedal, the zone that needs most power-assisted from leaving 10-45 degree angle, summit, but the angle between each magnetic sheet group of this patent is 45 degree, leaves summit 10-45 degree angular zone neither one magnetic sheet group at stretcher, also with regard to the neither one control signal, when consequently needing most power-assisted, but the motor of morpet really can not power-assisted.
In a word, except with the not durable again complex structure of elastic component, fit structure characteristics because of Hall and magnetic sheet group, the rotating disk size diameter is in 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, the power-assisted demand with provide power-assisted not mate, cyclist's traveling comfort is poor; As increasing by force magnetic sheet group quantity, its transducing signal loses again the 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 moving, fixed two rotating disks, inlay two permanent magnetic steels above the Moving plate, inlay three Hall elements above the price fixing, bicycle pedal circles, each Hall produces two pulses, and then three Hall elements produce six pulses.Divide folding can get three characteristics, four shortcomings are as follows:
Characteristics (1) are for obtaining six impulse singlas, can only be each permanent magnetic steel same pole in one side: each Hall will produce two pulses, then can only be 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 all be the South Pole.If at the same face of Moving plate, a permanent magnetic steel is the arctic, another is the South Pole, and 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 has put down in writing.In order to increase pulse count, improve the control effect, can only be that each permanent magnetic steel same pole is in one side.
Characteristics (2) permanent magnetic steel is used for expression pedal fixed position, three Halls represent the pedal travel position: because pedal and Moving plate are synchronous rotations, so a permanent magnetic steel is fixed respectively in two positions on the Moving plate corresponding with two pedals, where some pedals turn, and then where corresponding permanent magnetic steel also turns; But only turn in the position that Hall is arranged, could send control signal by Hall, the motor of commander's morpet produces the power-assisted that needs and rotates.
The position of characteristics (3) middle different period pedal travels because Hall can not represent to circle, then just can not be only with a Hall: the different periods of pedal in circling, the power-assisted demand there is very big difference, embody the variation of this power-assisted demand, this patent is located at respectively 180 degree angles with three interior positions with three Halls, two permanent magnetic steels are located at respectively two pedal positions, pedal turns in the position that Hall is arranged, and this Hall represents that with regard to output signal pedal has arrived the position of this Huo Yuan.But there is again following shortcoming with a plurality of Halls.
These characteristics as the morpet sensor have three shortcomings:
Shortcoming (1) represents respectively the fixed position of two pedals with two permanent magnetic steels that do not have an otherness, the turned position that just can only represent with a plurality of Halls pedal: two permanent magnetic steels do not have otherness, advantage is can be regardless of the fixed position that represents respectively two pedals of left and right sides pin, make its left and right sides human hair combing waste give birth to the power-assisted demand, can produce identical motor power-assisted effect; But shortcoming is permanent magnetic steel itself just can not represent the turned position of pedal, and can only be located at the turned position that different angle positions represents pedal with a plurality of Halls, thus can not be only with a Hall, and must use a plurality of Halls.
Shortcoming (2) can not be only with a Hall, and three Halls must cause three control signals that original segmentation error is arranged, make the distortion of power-assisted demand model, naturally it is inconsistent with the power-assisted demand to produce power-assisted output: no matter morpet is one or two motor, the transducing signal of its control motor can only just can reach with a transducing signal input electric machine controller purpose of control motor; And this patent is with three Halls control motors, then must merge into one to three control signals of three Halls and could input electric machine controller after merging control signal.The parameter sensing of three Halls can not be the same, particularly owing to after variation of ambient temperature, the 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 Halls be different voltages, cause motor to produce different power-assisted output, power-assisted output is inconsistent with the power-assisted demand; In like manner during identical power-assisted demand, the output of different Halls may be identical voltage again, cause motor to produce the output of same power-assisted, also produce power-assisted output and the inconsistent problem of power-assisted demand.
Shortcoming (3) merges control signal and easily produces signal drift, merging control signal and electric machine controller are not mated, power-assisted demand model distortion: because 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, then the merging control signal of identical power-assisted demand generation will produce the signal drift of segmenting, merge control signal as a whole signal distortion that produces, be the distortion of power-assisted demand model, any one that causes that electric machine controller selects three control signals all can produce power-assisted output and the inconsistent problem of power-assisted demand as benchmark.
Shortcoming (4) sensing site can not arbitrarily increase, the sensing site very little, the motor operation is just not steady, make people by bike feel very uncomfortable: owing to have shortcoming (1) and shortcoming (2) all to cause greater than one because of Hall quantity, clearly Hall quantity is measured more and more, and shortcoming (1) and shortcoming (2) performance are more serious.So the morpet that this patent provides can only be to make people by bike feel the morpet that traveling comfort is very bad.
Shortcoming (5) signal blind zone reaches 42 degree angles, really can not get power-assisted when needing power-assisted during startup: well-known, it is minimum in summit moment that the people steps on bicycle pedal, the zone that needs most power-assisted from leaving 10-45 degree angle, summit, but the angle between each Hall of this patent is the 42.5-43.5 degree, leaves summit 10-42 degree angular zone neither one Hall at stretcher, also with regard to the neither one control signal, 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 with a plurality of Hall control assistant modes, because can only represent with a plurality of Halls the turned position of pedal, a plurality of control signals of a plurality of Halls must have original error, it merges control signal and easily produces again signal drift, 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, the quantity of having placed restrictions on Hall, the Hall small number and to produce the motor operation just not steady, make people by bike feel very uncomfortable, and can not get power-assisted when starting.Make it want the power-assisted demand model undistorted, and want motor to operate steadily and always attend to one thing and lose sight of another on these two problems, can not get both.
Summary of the invention
The purpose of this utility model provides the sensitive member that only obtains speed and acceleration signal with each permanent magnets on a Hall and the annular groove rolling disc, but be a kind of in induction region, can increase permanent magnets quantity as far as possible, utilize to greatest extent annular groove rolling disc displacement information, output information is accurate location again how, and Hall and a plurality of permanent magnets are with the fixing sensitive member of relative position of an assembly set.Use is measured moment without elastic component and other machinery on morpet, also can make the power-assisted demand good with the power-assisted coupling that provides, the morpet sensor sensitive member that motor operates steadily.
Design of the present utility model is: but in a Hall receptive field, carry out the alternately variation of south, northern polarity with identical a plurality of permanent magnets to the side of Hall on the annular groove rolling disc, make an one Hall can experience the motor message of whole permanent magnets.The variation pattern of a plurality of permanent magnets mainly is magnetic polarity variation, change in location, three kinds of variation patterns of magnetic flux change, and purpose makes Hall can obtain the permanent magnets motor message that ad-hoc location is more accurate, control is with better function, more.A plurality of permanent magnets magnetic polarities alternately change with the arctic, the South Pole, and the signal that Hall is produced is square wave, make the control of signal with better function, more; It is more accurate that the signal that a plurality of permanent magnets change in location, magnetic flux change produce Hall can be expressed the position of permanent magnets, thereby can express the state of kinematic motion of annular groove annular groove rolling disc ad-hoc location.For morpet, the ad-hoc location of expressing stretcher is extremely important at what state of kinematic motion because the state of kinematic motion direct representation of stretcher the power-assisted need state of people to car.
Structure of the present utility model is:
The sensitive member of many magnetic patch position and magnetic flow uneven distribution in the housing,
Comprise annular groove rolling disc 1, annular groove reaction plate 40, a Hall 3 and many pieces of permanent magnets 2,It is characterized in that:
Both concave surfaces of annular groove rolling disc 1 and annular groove reaction plate 40 are relative, annular groove reaction plate 40 is entrenched among the annular groove of annular groove rolling disc 1, become in relative rotation chimeric interior empty shell of two dishes, the concave surface of two dishes presss from both sides into a cavity ring 41; In cavity ring 41 positionsBe fixedly installed a plurality of permanent magnets 2 on the annular groove rolling disc 1,2 one-tenth annular arrangements of a plurality of permanent magnets distribute, and 2 one-tenth of a plurality of permanent magnets are dislocatedly distributed, and being dislocatedly distributed is radius mode or spacing a certain of mode that be dislocatedly distributed that be dislocatedly distributed; Or the radius mode that is dislocatedly distributed, the array mode that has again spacing to be dislocatedly distributed arranged namely;
The radius mode of being dislocatedly distributed is: these a plurality of permanent magnets 2 are distributed in annular arrangement 6 scopes, have at least a circular rail trace to run through whole permanent magnets 2 between the interior circular trajectory 5-1 of annular arrangement 6 and outer ring trajectory 5-2; Interior circular trajectory 5-1 and outer ring trajectory 5-2 are concentric circles, have at least two permanent magnets 2 not identical to the distance at circle center, interior circular trajectory 5-1 place;
The spacing mode of being dislocatedly distributed is: the distance between the adjacent permanent magnets 2 is permanent magnets spacing 7; Have at least the length of two permanent magnets spacings 7 not identical;
Annular groove rolling disc 1 to
Cavity ring 41Face, the magnetic polarity of adjacent permanent magnets 2 is opposite, on annular groove rolling disc 1 all the magnetic polarity distribution mode of permanent magnets 2 be the N utmost point, the S utmost point, the N utmost point, the S utmost point, the N utmost point, the S utmost point Have at least the magnetic flow of two pieces of permanent magnets 2 not identical;
Annular groove reaction plate 40 in cavity ring 41 is fixedly installed a Hall 3, and Hall 3 is located at the position that also can experience each permanent magnets 2 magnetic flow near permanent magnets 2, between Hall 3 and the permanent magnets 2 spacing is arranged; Hall 3 is the Halls that opposite magnetic polarities produced the square wave output signal.
Annular groove rolling disc 1 is namely chimeric with annular groove reaction plate 40, can relatively rotate again, guaranteed at annular groove rolling disc 1 rotary state, Hall 3 does not change with the sensed position of whole permanent magnets 2, make the output signal of Hall 3 only relevant with the rotation of whole permanent magnets 2, and irrelevant with annular groove rolling disc 1 and the object of annular groove reaction plate below 40; If annular groove rolling disc 1 is used metallic material with annular groove reaction plate 40, again shielding action can be arranged, so, place cavity ring 41 to respond to Hall 3 and whole permanent magnets 2 with annular groove rolling disc 1 and annular groove reaction plate 40, improved reliability, the authenticity of Hall 3 signals.
When annular groove reaction plate 40 is fixed on a certain object, when swivel becket connected in star rolling disc 1, Hall 3 on each permanent magnets 2 inswept annular groove reaction plates 40 on the annular groove rolling disc 1, each permanent magnets 2 can both make Hall 3 produce electric signal.Because the magnetic polarity of adjacent permanent magnets 2 is opposite, namely all magnetic polarity south, the north of permanent magnets 2 replace in the face of Hall 3, then to produce electric signal be square-wave signal to Hall 3, square-wave signal is conveniently carried out the digitized processing signal, is used for the realization Digital Control.Prior art be the same magnetic polarity of the usefulness of whole permanent magnets 2 towards Hall 3, Hall 3 just can only produce sine wave signal, so can only be used for simulation control; Once the sensed parameter of Hall 3 changes, simulation control just may distortion.And the utility model is realized Digital Control with square-wave signal, can not produce the problem of control distortion.
Annular groove 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, annular groove rolling disc 1 will rotate, so annular groove rolling disc 1 claims again rolling disc, the center of rotation is exactly that 2 one-tenth annular arrangement distributions of a plurality of permanent magnets are at the center of circle.
A plurality of permanent magnets 2 are in annular arrangement 6 scopes, the purpose that becomes annular arrangement to distribute is only to experience with a Hall 3 state of kinematic motion of whole permanent magnets 2 on the annular groove rolling disc, namely experience movement position and the speed of whole permanent magnets 2 on the annular groove rolling disc, and the variation of speed, or title acceleration/accel, this Hall 3 just can be expressed the state of kinematic motion of permanent magnets 2 with a continuous electric signal, because it is on the annular groove rolling disc 1 that whole permanent magnets 2 is separately fixed at the annular groove rolling disc, then the continuous electric signal of Hall 3 generations just can be expressed the state of kinematic motion of annular groove rolling disc again.If this continuous electric signal is used for other object of control, this continuous electric signal is exactly control signal.If be used for the motor of control morpet, also need with micro controller system or other electron component as sensing signal processor, position in the control signal, speed, acceleration/accel are wanted rope to convert to need what power-assisted signal of power-assisted, the function that converts is exactly the power-assisted demand model, or claims the power-assisted model.
2 one-tenth meanings that are dislocatedly distributed of a plurality of permanent magnets are: making in the electric signal that Hall 3 produces is not duplicate impulse singla, but the different impulse singla of pulse width, distinguish the diverse location of permanent magnets 2 with distinguishing impulse singla, thereby can obtain the state of kinematic motion of diverse location permanent magnets 2.But reach certain position of accurate expression annular groove rolling disc, or each there is the state of kinematic motion of permanent magnets 2.As being used for morpet, but accurate expression ride in the demand of diverse location to power-assisted, make the expression of power-assisted demand more accurate, then car is just more consistent with people's cooperation.
The permanent magnets 2 radius modes of being dislocatedly distributed are: the permanent magnets 2 that has is close to the center of turn of annular groove rolling disc, and the permanent magnets 2 that has is away from the center of turn of annular groove rolling disc.No matter but far and near, permanent magnets 2 must can be experienced, can produce in the scope of electric signal 3 of Halls.The scope that can produce electric signal is exactly the scope between interior circular trajectory 5-1 and the outer ring trajectory 5-2.For guaranteeing that Hall 3 can produce electric signal, have at least a circular rail trace to run through whole permanent magnets 2 between circular trajectory 5-1 and the outer ring trajectory 5-2 in requiring on the structure.Have at least two permanent magnets 2 not identical to the distance at circle center, interior circular trajectory 5-1 place, certainly can each permanent magnets 2 not identical to the distance at circle center, the radius that is each permanent magnets 2 is not identical, so that each pulse of Hall 3 electric signal can be illustrated in permanent magnets 2, make each pulse can represent an annular groove rolling disc position.
The permanent magnets 2 spacing modes of being dislocatedly distributed are: with the outward flange of permanent magnets 2 as the basis of measuring spacing, have at least the length of two permanent magnets spacings 7 not identical, certainly length that can every permanent magnets spacing 7 is not identical, so that each pulse of Hall 3 electric signal can be illustrated in permanent magnets 2, make each pulse can represent an annular groove rolling disc position.
The not identical meaning of a plurality of permanent magnets 2 magnetic flow is: making in the electric signal that Hall 3 produces is not duplicate impulse singla, but the different impulse singla of peak valley difference, distinguish the diverse location of different permanent magnets 2 with distinguishing impulse singla, thereby can obtain the state of kinematic motion of diverse location permanent magnets 2.But reach certain position of accurate expression annular groove rolling disc, or each there is the state of kinematic motion of permanent magnets 2.As being used for morpet, but accurate expression ride in the demand of diverse location to power-assisted, make the expression of power-assisted demand more accurate, then car is just more consistent with people's cooperation.
The not identical namely magnetic flow of a plurality of permanent magnets 2 of a plurality of permanent magnets 2 magnetic flow is vicissitudinous, the scope of its variation should be the same Hall 3 sensitive magnetic flow scopes of invariant position, that is to say that the peak of a plurality of permanent magnets 2 magnetic flow and minimum should be in Hall 3 sensitive magnetic flow scopes.
The magnetic polarity of adjacent permanent magnets 2 is very important technical characterictic on the contrary, all the magnetic polarity distribution mode of permanent magnets 2 is the N utmost point, the S utmost point, the N utmost point, the S utmost point, the N utmost point, the S utmost point ... make the high and low alternate square-wave signal of Hall 3 outputs, because the annular groove rolling disc that ends as limited size, rotating the accurate variable signal that will obtain in a week as much as possible, should be to select square wave certainly.The time that the peak-to-valley value of square-wave signal changes is short, can within the regular hour, produce the signal that the control meaning is arranged as much as possible.The structure generation square wave that the magnetic polarity of adjacent permanent magnets 2 is opposite, and the identical structure generation sinusoidal waveform of the magnetic polarity of adjacent permanent magnets 2, during especially for morpet, generally placing restrictions at diameter as the annular groove rolling disc of sensing element is 10-15 centimetre, to obtain the signal of control function in this limit scope, rotate a week, produce square wave than producing the available pulse number of sinusoidal waveform and many 7-9 doubly.Nature, the opposite structure of the magnetic polarity of adjacent permanent magnets 2 to the control effect of morpet more, the people cooperates with car better, the rider people feels more comfortable.
Be provided with bearing 42 between the inside face of the outside face of annular groove reaction plate 40 inner rings and annular groove rolling disc 1 inner ring.Bearing 42 makes between annular groove reaction plate 40 and the annular groove rolling disc 1 can keep good relatively rotating for a long time.
Annular groove rolling disc 1 is provided with centre hole in the circle scope of the interior circular trajectory 5-1 place of a plurality of permanent magnets 2.If annular groove rolling disc 1 will be set on the turning cylinder and use, will establish a hole that wears turning cylinder on the annular groove rolling disc 1; For guaranteeing that annular groove rolling disc 1 is when rotating with turning cylinder, Hall 3 can be experienced the motor message of each permanent magnets 2 on the annular groove rolling disc 1, then wear the center that the hole should be located at the interior circular trajectory 5-1 place circle scope of a plurality of permanent magnets 2 on the annular groove rolling disc 1, because interior circular trajectory 5-1 and outer ring trajectory 5-2 are concentric circles, certainly wear the outside center of circular rail trace 5-2 place circle scope, hole, wearing the hole is the hole, center of interior circular trajectory 5-1 and outer ring trajectory 5-2, i.e. centre hole.That is to say, centre hole is not necessarily circular, can be the shapes such as square, triangle, in order to 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 interior circular trajectory 5-1 place circle, could use a Hall 3 to experience the motor message of whole permanent magnets 2 on the annular groove rolling disc 1 annular groove rolling disc.
Have being uneven in length in other any one permanent magnets spacing 7 of a permanent magnets spacing 7 at least, and 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.Be not equal to other length, namely the permanent magnets spacing 7 of particular length can be used for representing the position of bicycle pedal.Preferably have being uneven in length in other any one permanent magnets spacing 7 of two permanent magnets spacings 7 at least, the permanent magnets spacing 7 of these two particular length corresponds respectively to two stretchers, is used for the position of two stretchers of expression bicycle.Equally, be not equal to other magnetic flow, namely special values of magnetic flux also can be used for representing the position of 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, is used for the position of two stretchers of expression bicycle.That is to say that the position of a stretcher is with the permanent magnets spacing 7 of a particular length, also the permanent magnets 2 with a special values of magnetic flux represents that its accuracy and reliability improves greatly.Because the circular movement of bicycle pedal is judged pedal position for the speed that obtains this circular movement, determine that the power-assisted model of circular movement is extremely important next time.
Annular groove rolling disc 1 is plastic flagstone, aluminum board, copper material plate a certain of non-magnet_conductible material.Because the utility model is the opposite structure of magnetic polarity of adjacent permanent magnets 2, can make the edge of adjacent permanent magnets 2 almost can be affixed the electric signal that also can make Hall 3 outputs that the control function is arranged.
Advantage of the present utility model: simple in structure, cost is low, the permanent magnets quantity on the permanent magnets ring is not placed restrictions on, the impulse singla of outputting standard, do not have signal blind zone, only with one group of output signal of a Hall just the total movement state, output signal of energy perfect representation Moving plate can distortion do not drift about,
Represent the fixed position, place with permanent magnets change in location and magnetic flux change, the movement position of each permanent magnets can be arranged in the output signal, be used for morpet, power-assisted output can highly be cooperated with the power-assisted demand and the cyclist is felt well.
(1) simple in structure, without elastic component, machinery-free fault: experience a plurality of permanent magnets with Hall and rotate output signal, the speed that provides with Chinese patent 01201843.0 can be calculated the principle of moment, available multiple math modeling is calculated the moment parameter of morpet, the motor that is used for the control morpet is realized power-assisted.Be lower than with elastic component and mechanically stressed sensor without elastic component, simple in structure, cost.After having avoided long-time use, each mechanical part distortion, machinery-free fault, the not good problem of cooperation.
(2) magnetic polarity is opposite, the output square-wave signal has accurate control function: because the magnetic polarity of adjacent permanent magnets is opposite, and Hall is selected opposite magnetic polarities is produced the square wave output signal
Hall, then adjacent permanent magnets no matter spacing what, even very close to each other between the adjacent permanent magnets, Hall can be exported square-wave signal too.As being used for morpet, the motor of controlling morpet with the output signal of square wave is better than using sinusoidal waveform, because the rectangle wave energy is accomplished at any time point of signal, the signal implication of expression movement position and speed is accurate, but thereby the movement position of Precise Representation booster bicycle pedal and speed, in order to go out the correct power-assisted demand of this state of kinematic motion with the accurate position of pedal and speed calculation.
(3) magnetic polarity of adjacent permanent magnets is opposite, permanent magnets quantity is not placed restrictions on, can increase the sensing point position: because magnetic polarity is opposite as far as possible, the output square-wave signal, even adjacent permanent magnets gapless, the signal of its output has remained number, differentiable square-wave signal, still has the control function, that is to say to export the unchanged linear signal of not controlling function.As being used for morpet, owing to placed restrictions on the annular groove rolling disc diameter of pedal linkage, just can be on the annular groove rolling disc of prescribed level, increase as far as possible permanent magnets quantity, as far as possible increase the sensing point position, represent bicycle pedal movement position and speed, the Precise Representation state of kinematic motion with as much as possible transducing signal.
(4) magnetic polarity of adjacent permanent magnets is opposite, it is many permanent magnets to be set, the sensing point position is many, state of kinematic motion to the annular groove rolling disc represents accurately: to being used for morpet, fixedly the annular groove rolling disc size of permanent magnets is strictly placed restrictions on, general annular groove rolling disc diameter can only be in 10-15 centimetre, in order to make Hall that the magnetic pole signal that obtains permanent magnets under the condition of spacing arranged, the diameter of its permanent magnets is at least Ф 0.6-0.8 centimetre, then peripheral zero-lash 35-73 permanent magnets ［ (10-1) the * 3.14/0.8=35 that arranges of diameter 10-15 centimetre annular groove rolling disc; (15-1) * 3.14/0.6=73 ］, namely stretcher circles, and Hall can obtain the motor that 35-73 signal is used for the control morpet.But if the identical prior art of adjacent permanent magnets magnetic polarity, adjacent permanent magnets then on diameter 10-15 centimetre of annular groove rolling disc, can only arrange at most 5-8 permanent magnets ［ (10-1) * 3.14/5.8=5 by 5 centimetres of spacings; (15-1) * 3.14/5.6=8 ］.As seen, the art of this patent can arrange doubly ［ 35/5=6 of permanent magnets 7-9 than prior art more; 73/8=9 ］, 30-65 permanent magnets ［ 35-5=30 is set more; 73-8=65 ］.So the annular groove rolling disc circles, the art of this patent has increased 7-9 annular groove turn disc site signal doubly than prior art.Electric machine control accuracy rate to morpet has improved 7-9 doubly naturally, make the cyclist also improve 7-9 doubly to power-assisted demand accuracy rate, car and people's cooperate degree improves greatly, and cyclist's comfort increases greatly, no longer is boosted vehicle the sort of one fast one slow uncomfortable sensation of prior art.The utility model is asked someone according to the experience of reality, when roughly 15 permanent magnets being set uniformly on the annular groove rolling disc, elimination prior art only establish 5-8 permanent magnets and make boosted vehicle the sort of one fast one slow uncomfortable sensation; When roughly 20 permanent magnets being set uniformly on the annular groove rolling disc, car cooperates oneself can satisfy human needs with the people's, and the sensation of riding boosted vehicle is very comfortable.
(5) do not have signal blind zone, the power-assisted that power-assisted demand whenever all can obtain to be complementary: this patent can arrange at most 35-73 permanent magnets at diameter 10-15 centimetre annular groove rolling disc periphery, and average angle is the 5-10 degree between each permanent magnets.Be used for morpet, when starting or move, stretcher is in the 35 degree zones of leaving 10-45 degree angle, summit, 4-7 permanent magnets (signal just having been arranged in the position of leaving 10 degree angles, summit) arranged, then the exportable 4-7 of Hall control signal reacts the power-assisted demand, can realize any position, have power-assisted just can obtain the excellent technique effect of corresponding power-assisted any time, make car and people's no-float, it is laborsaving comfortable again that the cyclist feels.
(6) only with a Hall, the total movement state of a control signal representative ring connected in star rolling disc, the state of kinematic motion of control signal and annular groove rolling disc is in full accord, control signal and people's demand is in full accord: a plurality of permanent magnets are fixed on the annular groove rolling disc, permanent magnets and annular groove rolling disc rotate synchronously, with a whole permanent magnets motor message of Hall impression, then the state of kinematic motion of the control signal of Hall output and annular groove rolling disc is in full accord, just in full accord with people's demand, control signal does not have original segmentation error and signal drift problem yet.Even the hall sensing parameter changes, also be whole control signal parallel, as long as reception Hall control signal
Electric machine controllerRange of receiving wider, the control effect of the Hall control signal that has changed becomes systematicness to change.As being used for morpet, the power-assisted demand model can distortion, and power-assisted output and power-assisted demand still keep the matching relationship of original model, and the systematicness that the cyclist is easy to grasp this power-assisted ability changes.
(7) have dislocation also between the permanent magnets
Also has magnetic flux change, permanent magnets represents the state of kinematic motion of specific site more reliably: because permanent magnets misplaces in radial direction dislocation or circular arc line spacing, the dislocation permanent magnets makes Hall output peculiar
Wave spaceControl signal; Again because each permanent magnets
Magnetic flow also changes, each permanent magnets also makes Hall output peculiar
The peak valley differenceThe control signal of waveform has each square wave of control signal
Wave space and peak valley differenceTwo kinds of wave form varies modes that is to say, use
Wave space and peak valley differenceTwo kinds of parameters represent a certain movement position of permanent magnets, and control signal represents that the state of kinematic motion of permanent magnets is more accurate.Such as each permanent magnets oneself specific dislocation site is arranged, also have special
Magnetic flow, what permanent magnets can reach has, and just can obtain how many individual motion state signal that two kinds of wave form varies modes are arranged.As being used for morpet, annular groove rolling disc diameter is in 10-15 centimetre, the annular groove rolling disc circles, and the state of kinematic motion control signal that it is two kinds of wave form varies modes that Hall can obtain 35-73 different loci is known the power-assisted demand in 35-73 site naturally.Clearly, the annular groove rolling disc circles, the power-assisted demand that the power-assisted demand that prior art can only have at most 5-8 sinusoidal waveform to represent, the power-assisted desired signal that is nothing like the maximum available 35-73 of this patent two kinds of wave form varies modes more can be truly, multiple data quantity ground, reliability highland react the cyclist.That is to say that morpet the art of this patent, Che Gengneng and people's demand match consistent, the cyclist experiences stretcher at any turned position, but oneself complete regulation speed all, and traveling comfort is good.And but the morpet of prior art can only be at maximum 5-8 turned positions ability regulation speed.
(8) use the in relative rotation synthetic housing of annular groove rolling disc annular groove reaction plate, fixed the relative position of Hall with whole permanent magnets, avoid the outer ambient interference of housing, improved reliability, the authenticity of hall signal, also made things convenient for installation, debugging, maintenance etc.
Description of drawings
Fig. 1 is many magnetic patch and each point magnetic flow uneven distribution on the rolling disc, and the sensitive member structural representation that replaces of permanent magnets N-S, and the different expression of permanent magnets line weight magnetic flow are different among the figure;
Fig. 2 is high density magnetic patch and each point magnetic flow uneven distribution on the rolling disc, and the permanent magnets sensitive member structural representation that becomes N-S to replace, and the different expression of permanent magnets line weight magnetic flow are different among the figure;
Fig. 3 is the cross-sectional view of sensitive member.
1 is annular groove rolling disc, the 2nd among the figure, permanent magnets, the 3rd, and Hall, 5-1 are that interior circular trajectory, 5-2 are outer ring trajectories, the 6th, annular arrangement, the 7th, magnetic patch spacing, the 40th, annular groove reaction plate, the 41st, cavity ring, the 42nd, bearing.
The specific embodiment
The sensitive member of many magnetic patch position and magnetic flow uneven distribution in embodiment 1, the housing
Such as Fig. 1,3, with one
Both concave surfaces of annular groove rolling disc 1 and an annular groove reaction plate 40 are relative, the size of annular groove rolling disc 1 and annular groove reaction plate 40 just in time makes annular groove reaction plate 40 can be entrenched among the annular groove of annular groove rolling disc 1, synthetic two dishes are chimeric interior empty shell in relative rotation, and the concave surface of two dishes presss from both sides into a cavity ring 41; In cavity ring 41 positionsBe fixedly installed 20 permanent magnets 2 on the annular groove rolling disc 1.
Annular groove rolling disc 1 and annular groove reaction plate 40 usefulnessHighstrenghtpiston's injection molded.
10.0 centimetres of 1 diameters of annular groove rolling disc in the cavity ring 41, the diameter of establishing 2,20 permanent magnets 2 of 20 permanent magnets at annular groove rolling disc 1 are respectively 0.8 centimetre, and magnetic flow is146---279 (BH) max/KJm
-3 Different selective value in the scope, and it is unequal to face mutually the magnetic flow of permanent magnets 2.The structure of annular groove rolling disc 1, permanent magnets 2, Hall 3 is as follows:
Each permanent magnets 2 is fixed in 8.5 centimetres of the diameters in annular arrangement 6 scopes between the circular trajectory 5-1-9.5 centimetre of outer ring trajectory 5-2, has 2 one-tenth radiuses of a plurality of permanent magnets to be dislocatedly distributed, and has 2 one-tenth spacings of a plurality of permanent magnets to be dislocatedly distributed.
The radius mode of being dislocatedly distributed is: these a plurality of permanent magnets 2 are distributed in annular arrangement 6 scopes, have at least a circular rail trace to run through whole permanent magnets 2 between the interior circular trajectory 5-1 of annular arrangement 6 and outer ring trajectory 5-2; Interior circular trajectory 5-1 and outer ring trajectory 5-2 are concentric circles, have at least two permanent magnets 2 not identical to the distance at circle center, interior circular trajectory 5-1 place;
The spacing mode of being dislocatedly distributed is: the distance between the adjacent permanent magnets 2 is permanent magnets spacing 7; Have at least the length of two permanent magnets spacings 7 not identical.
Being uneven in length in the length of other any one permanent magnets spacing 7 of two permanent magnets spacings 7 arranged, and the length of these two permanent magnets spacings 7 is also unequal.The position that two permanent magnets 2 are arranged at these two permanent magnets spacing 7 places is just in time at the two ends of 1 one diameters of rolling disc.The magnetic flow of these two permanent magnets 2 is not equal to the magnetic flow of other any one permanent magnets spacing 7, and the magnetic flow of these two permanent magnets 2 is also unequal, and these two permanent magnets 2 are used for the movement position at two stretchers of morpet expression.
The opposite mode of magnetic polarity in 2 one-tenth adjacent permanent magnets 2 of whole permanent magnets of 1 one face settings of rolling disc is arranged, namely on 1 one faces of rolling disc all the magnetic polarity distribution mode of permanent magnets 2 be the N utmost point, the S utmost point, the N utmost point, the S utmost point, the N utmost point, the S utmost point ...
Annular groove reaction plate 40 in cavity ring 41 is fixedly installed a Hall 3,
The output line of Hall 3 passes from annular groove reaction plate 40 Hall 3 is located at the position near permanent magnets 2, be Hall 3 be located at each permanent magnets 2 circular rail trace 5-1 and annular arrangement 6 scopes between the outer ring trajectory 5-2 in, Hall 3 keeps 0.3 centimetre spacing distance with each permanent magnets 2 of rotary state, make each permanent magnets 2 of rotation through Hall 3 time, Hall 3 can produce the square wave electric signal output of a correspondence.
The sensitive member of many magnetic patch position and magnetic flow uneven distribution in embodiment 2, the high density housing
Such as Fig. 2,3,
10.0 centimetres of 1 diameters of annular groove rolling disc in the cavity ring 41, the diameter of establishing 2,40 permanent magnets 2 of 40 permanent magnets at annular groove rolling disc 1 are respectively 0.6 centimetre, and magnetic flow is146---279 (BH) max/KJm
-3 Different selective value in the scope, and it is unequal to face mutually the magnetic flow of permanent magnets 2. Hall 3 keeps 0.2 centimetre spacing distance with each permanent magnets 2 of rotary state, makes each permanent magnets 2 of rotation through Hall 3 time, and Hall 3 can produce the square wave electric signal output of a correspondence.The structure of other rolling disc 1, permanent magnets 2, Hall 3 is same as embodiment 1.
Claims (6)
1. the sensitive member of many magnetic patch position and magnetic flow uneven distribution in the housing, comprise annular groove rolling disc (1), annular groove reaction plate (40), a Hall (3) and many pieces of permanent magnets (2), it is characterized in that: annular groove rolling disc (1) is relative with both concave surfaces of annular groove reaction plate (40), annular groove reaction plate (40) is entrenched among the annular groove of annular groove rolling disc (1), become in relative rotation chimeric interior empty shell of two dishes, the concave surface of two dishes presss from both sides into a cavity ring (41); Annular groove rolling disc (1) in cavity ring (41) position is fixedly installed a plurality of permanent magnets (2), a plurality of permanent magnets (2) become annular arrangement to distribute, and a plurality of permanent magnets (2) become to be dislocatedly distributed, and being dislocatedly distributed is radius mode or spacing a certain of mode that be dislocatedly distributed that be dislocatedly distributed; Or the radius mode that is dislocatedly distributed, the array mode that has again spacing to be dislocatedly distributed arranged namely;
The radius mode of being dislocatedly distributed is: these a plurality of permanent magnets (2) are distributed in an annular arrangement (6) scope, have at least a circular rail trace to run through whole permanent magnets (2) between the interior circular trajectory (5-1) of annular arrangement (6) and outer ring trajectory (5-2); Interior circular trajectory (5-1) and outer ring trajectory (5-2) are concentric circles, have at least two permanent magnets (2) not identical to the distance at circle center, interior circular trajectory (5-1) place;
The spacing mode of being dislocatedly distributed is: the distance between the adjacent permanent magnets (2) is permanent magnets spacing (7); Have at least the length of two permanent magnets spacings (7) not identical;
Annular groove rolling disc (1) to cavity ring (41) face, the magnetic polarity of adjacent permanent magnets (2) is opposite, and the magnetic polarity distribution mode of the upper whole permanent magnets (2) of an annular groove rolling disc (1) is the N utmost point, the S utmost point, the N utmost point, the S utmost point, the N utmost point, the S utmost point Have at least the magnetic flow of two pieces of permanent magnets (2) not identical;
Annular groove reaction plate (40) in cavity ring (41) is fixedly installed a Hall (3), Hall (3) is located at the position that also can experience each permanent magnets (2) magnetic flow near permanent magnets (2), between Hall (3) and the permanent magnets (2) spacing is arranged; Hall (3) is the Hall that opposite magnetic polarities is produced the square wave output signal.
2. the sensitive member of many magnetic patch position and magnetic flow uneven distribution in the housing according to claim 1, it is characterized in that: Hall (3) is located between interior circular trajectory (5-1) and the outer ring trajectory (5-2).
3. the sensitive member of many magnetic patch position and magnetic flow uneven distribution in the housing according to claim 2, it is characterized in that: annular groove rolling disc (1) is provided with centre hole in the circle scope of interior circular trajectory (5-1) place of a plurality of permanent magnets (2).
4. the sensitive member of many magnetic patch position and magnetic flow uneven distribution according to claim 1 and 2 or in the 3 described housings, it is characterized in that: have being uneven in length in other any one permanent magnets spacing (7) of a permanent magnets spacing (7) at least, and 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).
5. the sensitive member of many magnetic patch position and magnetic flow uneven distribution in the housing according to claim 4 is characterized in that: rolling disc (1) is plastic flagstone, aluminum board, copper material plate a certain of non-magnet_conductible material.
6. the sensitive member of many magnetic patch position and magnetic flow uneven distribution in the housing according to claim 4 is characterized in that: be provided with bearing (42) between the inside face of the outside face of annular groove reaction plate (40) inner ring and annular groove rolling disc (1) inner ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220367957 CN202783630U (en) | 2012-07-28 | 2012-07-28 | Sensing element with non-uniformly distributed magnets and fluxes in shell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220367957 CN202783630U (en) | 2012-07-28 | 2012-07-28 | Sensing element with non-uniformly distributed magnets and fluxes in shell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202783630U true CN202783630U (en) | 2013-03-13 |
Family
ID=47810945
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220367957 Expired - Fee Related CN202783630U (en) | 2012-07-28 | 2012-07-28 | Sensing element with non-uniformly distributed magnets and fluxes in shell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202783630U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102785747A (en) * | 2012-07-28 | 2012-11-21 | 成都宽和科技有限责任公司 | Sensing element with non-uniform distribution of multiple magnetic block positions and magnetic flux in casing |
-
2012
- 2012-07-28 CN CN 201220367957 patent/CN202783630U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102785747A (en) * | 2012-07-28 | 2012-11-21 | 成都宽和科技有限责任公司 | Sensing element with non-uniform distribution of multiple magnetic block positions and magnetic flux in casing |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130313 Termination date: 20170728 |