CN102826184A - Sensing element with unevenly distributed magnetic fluxes of multiple magnetic blocks in shell - Google Patents
Sensing element with unevenly distributed magnetic fluxes of multiple magnetic blocks in shell Download PDFInfo
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- CN102826184A CN102826184A CN2012102635255A CN201210263525A CN102826184A CN 102826184 A CN102826184 A CN 102826184A CN 2012102635255 A CN2012102635255 A CN 2012102635255A CN 201210263525 A CN201210263525 A CN 201210263525A CN 102826184 A CN102826184 A CN 102826184A
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Abstract
The invention discloses a sensing element with unevenly distributed magnetic fluxes of magnetic blocks in a shell, and belongs to a technology for providing a control signal by multi-point magnetic induction. Permanent magnet blocks and halls are arranged inside a rotating plate and a fixing plate; a plurality of permanent magnet blocks which are distributed in a ring are fixedly arranged on the rotating plate; the magnetic fluxes of at least two permanent magnet blocks are different, and the magnetic polarities of the adjacent permanent magnet blocks are opposite at one side of the rotating plate, namely the magnetic polarity distribution mode of all permanent magnet blocks at one side of the rotating plate is an N pole, an S pole, the N pole ...; and the halls on the fixing plate are arranged at the positions near the permanent magnet blocks. The sensing element has the advantages that the halls can obtain rectangular wave signals by an opposite distribution mode of the magnetic polarities NS of the adjacent permanent magnet blocks; the signals can be conveniently subjected to digital treatment; the rectangular wave signals can present the positions of the permanent magnet blocks on the rotating plate by difference of the magnetic fluxes; uses of different rectangular waves are determined; the opposite positions of the permanent magnet blocks and the halls are fixed; and signal output is reliable.
Description
Technical field
The invention belongs to magnetic induction the technical field of signal is provided, particularly relate on rotatable parts, carry out the technology that the magnetic induction of multiple spot position 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 and has used 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 people's power-assisted need be mismatched.And complicated with the project organization of elastic component, manufacturing cost is high.
The Chinese patent 01201843.0 " electric assisted bicycle automatic checkout equipment " of University of Science & Technology, Beijing's application discloses a kind of electric assisted bicycle automatic checkout equipment; The no touch detection is pedaled power, speed and is turned to; This device is established magnetic sheet respectively 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 people's power-assisted need be mismatched, 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 position separately of different magnetic sheet groups can not express the special power-assisted demand of diverse location: from Fig. 3,4,5 of 01201843.0 patent, 6 and the record explanation of the 2nd section of Instructions Page 2, the magnetic pole set-up mode of each magnetic sheet group (comprising a magnetic sheet 4, magnetic sheet 5, a magnetic sheet 6) is all identical; Promptly only be that diverse location at interior wheel is simply from being provided with identical magnetic sheet group again; The state of kinematic motion of ad-hoc location can not be represented in the position separately that can not represent different magnetic sheet groups, and the people is by bike the time; Pedal and with corresponding each position of pedal at state of kinematic motion; Own special power-assisted demand is all 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 all the same; Then each magnetic sheet group can not be represented this position of magnetic sheet group on interior wheel; The signal that Hall is exported can not be represented the position of stretcher and other magnetic sheet group; The signal that is Hall output can not be represented different foot positions to power-assisted demand, cause to power-assisted demand with provide the power-assisted time to mismatch, promptly man-machine cooperation is undesirable.
Shortcoming (4) sine wave output makes the magnetic sheet group Edge Distance can not be less than 4 centimetres; Be good with 5 centimetres generally, 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 8 magnetic sheet groups at most on 20 centimetres the annular groove rolling disc circular trace at diameter; Be good with 5 generally, Hall just can have the sine wave signal of controllable 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 does not have controllable function, can not the control motor, when making it need power-assisted especially, lose assist function.
Shortcoming (5) signal blind zone reaches miter angle, needs really to can not get power-assisted the time power-assisted during startup: well-known, the people step on bicycle pedal on the summit moment minimum; From leaving 10-45 degree angle, summit is to need most power-assisted zone; 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; Consequently need most power-assisted the time, but the motor of morpet really can not power-assisted.
In a word, except that with the not durable complex structure again of elastic component, the fit structure characteristics of Yin Huoer 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 match, cyclist's traveling comfort is poor; As increasing magnetic sheet group quantity by force, its transducing signal loses the power operated control function again.
The Chinese patent 03264387.X " time type electric assisted bicycle sensor " 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 following:
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 one side that the same pole of two permanent magnetic steels is located at Moving plate, promptly in certain one side of Moving plate, two permanent magnetic steels all be the arctic or all be the South Pole.If in the same one side 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 have only 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 to represent the pedal fixed position; Three Halls are represented the pedal travel position: because pedal and Moving plate are synchronous rotations; So with two cooresponding Moving plates of pedal on the fixing respectively permanent magnetic steels in two positions; Where some pedals change, and where then cooresponding permanent magnetic steel also changes; But have only commentaries on classics in the position that Hall is arranged, could send control signal through Hall, the power-assisted that the motor generation of commander's morpet needs is rotated.
The position of different period pedal travels during characteristics (3) can not be represented to circle because of a Hall; Then just can not be: the different periods of pedal in circling only with a Hall; The power-assisted demand there is very big difference; Embody the variation of this power-assisted demand, this patent is located at 180 degree angles respectively with three interior positions with three Halls, and two permanent magnetic steels are located at two pedal positions respectively; Pedal changes in the position that Hall is arranged, and this Hall representes that with regard to output signal pedal has arrived the position of this Huo Yuan.But there is following shortcoming again with a plurality of Halls.
These characteristics as the morpet sensor have three shortcomings:
Shortcoming (1) is represented the fixed position of two pedals respectively with two permanent magnetic steels that do not have an otherness; The turned position that just can only represent pedal with a plurality of Halls: two permanent magnetic steels do not have otherness; Advantage is the fixed position of representing two pedals respectively that can be regardless 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 a 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 is represented 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 the purpose of control motor with a transducing signal input electric machine controller; And this patent is with three Halls control motors, then must merge into one to three control signals of three Halls and could import 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 maybe 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; During in like manner identical power-assisted demand, the output of different Halls possibly be identical voltage again, cause motor to produce with a kind of power-assisted output, also produce power-assisted output and the inconsistent problem of power-assisted demand.
Shortcoming (3) merges control signal and is prone to produce signal drift; Merging control signal and electric machine controller are not matched; The distortion of power-assisted demand model: after variation of ambient temperature, period of service length, the parameter sensing of three Halls maybe be widely different, and 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 a whole signal distortion that produces, i.e. power-assisted demand model distortion, any one that causes that electric machine controller selects three control signals for use 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 shortcoming (1) and shortcoming (2) are arranged all because Hall quantity causes greater than one, clearly Hall quantity is measured manyly more more, and shortcoming (1) and shortcoming (2) show serious more.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, needs really to can not get power-assisted the time power-assisted during startup: well-known, the people step on bicycle pedal on the summit moment minimum; From leaving 10-45 degree angle, summit is to need most power-assisted zone; 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; Consequently need most power-assisted the time, but the motor of morpet really can not power-assisted.
In a word; This patent is that because can only represent the turned position of pedal with a plurality of Halls, a plurality of control signals of a plurality of Halls must have original error with the technical scheme of a plurality of Hall control assistant modes; It merges control signal and is prone to produce 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 many more more, and the distortion of power-assisted demand model is serious more, 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 invention is to provide 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 annular groove rolling disc displacement information to greatest extent, how output information accurately locatees again, and Hall and a plurality of permanent magnets are with the sensitive member of an assembly set fixed with relative positions.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, and the morpet sensor that motor operates steadily is used sensitive member.
Design of the present invention is: but in a Hall receptive field, simultaneously carry out south, northern polarity alternate with identical a plurality of permanent magnets to that of Hall on annular groove rolling disc, make an one of which Hall can experience the motor message of whole permanent magnets.The variation pattern of a plurality of permanent magnets mainly is that magnetic polarity changes, magnetic flux change, purpose make Hall can obtain ad-hoc location more accurately, stronger, the more permanent magnets motor message of controllable function.A plurality of permanent magnets magnetic polarities are with the arctic, South Pole alternate, and the signal that Hall is produced is a square wave, make the controllable function of signal stronger, more; It is more accurate that the signal that a plurality of permanent magnets 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 invention is:
The sensitive member of many magnetic patch uneven distribution magnetic flow in the housing; Comprise an 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 two dishes can be chimeric in relative rotation in empty shell, the concave surface of two dishes presss from both sides into a cavity ring 41; On the annular groove rolling disc 1 of cavity ring 41 positions, be set with many pieces of permanent magnets 2; The rounded equably track of these many pieces of permanent magnets 2 distributes, and promptly every piece of permanent magnets 2 is identical to the distance between identical, the adjacent permanent magnets 2 of distance at circle center, circular rail trace 5 place; The magnetic polarity of adjacent permanent magnets 2 is opposite, and the magnetic polarity distribution mode of whole 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 on the annular groove rolling disc 1 Have at least the magnetic flow of two pieces of permanent magnets 2 inequality;
On the annular groove reaction plate 40 of cavity ring 41, be set with 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 Halls that opposite magnetic polarities produced the square wave output signal.
Annular groove rolling disc 1 is promptly 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, makes 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.
are when being fixed on annular groove reaction plate 40 on a certain object; Swivel becket connected in star rolling disc 1; During 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, promptly all magnetic polarity south, the north of permanent magnets 2 replace in the face of Hall 3, then Hall 3 generation electric signal are square-wave signal, square-wave signal is conveniently carried out the digitized processing signal, is used to realize 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 maybe distortion.And the present invention realizes Digital Control with square-wave signal, can not produce control out-of truth problem.
Annular groove rolling disc 1 can be on-deformable plate of material such as the exhausted plate of plastic flagstone, high strength, copper coin, aluminium sheet.When using sensitive member, annular groove rolling disc 1 will rotate, and the center of rotation is exactly the center of 2 one-tenth annular arrangements distributions of a plurality of permanent magnets place circle.
The purpose that 2 one-tenth annular arrangements of a plurality of permanent magnets distribute is only to experience with a Hall 3 state of kinematic motion of whole permanent magnets 2 on the annular groove rolling disc; Promptly experience the 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 be used to control other object to this continuous electric signal, this continuous electric signal is exactly a control signal.If be used to control the motor of morpet; Also need be with micro controller system or other electron component as sensing signal processor; Want rope to convert to need what power-assisted signal of power-assisted to the position in the control signal, speed, acceleration/accel; The function that converts is exactly the power-assisted demand model, or claims the power-assisted model.
A plurality of permanent magnets 2 magnetic flow meaning inequality is: making in the electric signal that Hall 3 produces is not duplicate impulse singla; But peak valley difference different pulse signal; 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.Reach and accurately to express certain position of annular groove rolling disc, or each there is the state of kinematic motion of permanent magnets 2.As be used for morpet, and can accurately express and ride at diverse location power-assisted demand, make the expression of power-assisted demand more accurate, then car is just more consistent with people's cooperation.
The magnetic flow of a plurality of permanent magnets 2 magnetic flow just a plurality of permanent magnets 2 inequality 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 important techniques characteristic very 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; As the annular groove rolling disc that limited size is ended, rotate the accurate variable signal that will obtain in a week as much as possible, should be to select square wave for use certainly.Because the time that the peak-to-valley value of square-wave signal changes is short, can in the regular hour, produce the signal that control Significance is arranged as much as possible.The magnetic polarity opposite configuration of adjacent permanent magnets 2 produces square wave; And the identical structure of the magnetic polarity of adjacent permanent magnets 2 produces sinusoidal waveform; During especially for morpet, generally place restrictions at diameter as the annular groove rolling disc of sensing element and be 10-15 centimetre, will obtain the signal of controllable 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 magnetic polarity opposite configuration 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 outside face of
annular groove reaction plate 40 inner rings and the inside face of 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 the center in the circle scope of the interior circular rail trace 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 rail trace place circle scope of a plurality of permanent magnets 2 on the annular groove rolling disc 1,, wear the center of the round scope in circular rail trace place outside, hole certainly because interior circular rail trace is a concentric circles with the outer ring trajectory; Wearing the hole is the hole, center of interior circular rail trace and outer ring trajectory, i.e. center.That is to say; The center is not necessarily circle; Can be shapes such as square, triangle; So that can be nested with the turning cylinder of shape such as square, triangle, but the interior sky at center necessarily comprise in the center of circular rail trace 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 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.The magnetic flow that is not equal to other, promptly special magnetic flow 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 magnetic flow corresponds respectively to two stretchers, is used to represent the position of two stretchers of bicycle.Because the circular movement of bicycle pedal is judged the stretcher position for the speed that obtains this circular movement, confirm that the power-assisted model of circular movement is extremely important next time.
Annular groove rolling disc 1 is plastic flagstone, aluminium plate, copper material plate a certain of non-magnet_conductible material.Because the present invention is the magnetic polarity opposite configuration of adjacent permanent magnets 2, can make the edge of adjacent permanent magnets 2 almost can paste the electric signal that also can make Hall 3 outputs that controllable function is arranged mutually.
Advantage of the present invention: simple in structure, cost is low, the permanent magnets quantity on the permanent magnets ring not restricted, outputting standard impulse singla, do not have signal blind zone, only with one group of output signal of a Hall just the total movement state, output signal of ability perfect representation Moving plate can distortion do not drift about,
Represent to belong to the fixed position with the magnetic flux change of permanent magnets, 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; Do not have mechanical fault: experience a plurality of permanent magnets with Hall and rotate output signal, can calculate torque principle with the speed that Chinese patent 01201843.0 provides, available multiple math modeling is calculated the moment parameter of morpet; Be used to control the motor of morpet, realize 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 is out of shape, does not have mechanical fault, cooperates not good problem.
(2) magnetic polarity is opposite, the output square-wave signal has the accuracy control function: because the magnetic polarity of adjacent permanent magnets is opposite, and Hall is selected for use 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 be used for morpet; The motor of controlling morpet with the output signal of square wave is superior to using sinusoidal waveform; Because the rectangle wave energy is accomplished signal point at any time; The signal implication of expression movement position and speed is accurate, thereby can accurately represent the movement position and the speed of booster bicycle pedal, so that go out the correct power-assisted demand of this state of kinematic motion with accurate position of pedal and speed calculation.
(3) magnetic polarity of adjacent permanent magnets is opposite; Permanent magnets quantity is restricted not, can increase the sensing point position as far as possible: because magnetic polarity is opposite, and the output square-wave signal; Even adjacent permanent magnets does not have the gap; The signal of its output has remained number, differentiable square-wave signal, still has controllable function, and that is to say can not export does not have the no change of controllable function linear signal.As be used for morpet; Because annular groove rolling disc diameter restricted with the pedal interlock; 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 with as much as possible transducing signal, accurately represent state of kinematic motion.
(4) magnetic polarity of adjacent permanent magnets is opposite; Can be provided with that permanent magnets is many, the sensing point position is many; The state of kinematic motion of annular groove rolling disc is represented accurately: to being used for morpet; Fixedly the annular groove rolling disc size of permanent magnets receives strictness and places restrictions on, and general annular groove rolling disc diameter can only have the magnetic pole signal that obtains permanent magnets under the condition of spacing in order to make Hall in 10-15 centimetre; 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 is provided with of diameter 10-15 centimetre annular groove rolling disc; (15-1) * 3.14/0.6=73 ］, promptly stretcher circles, and Hall can obtain the motor that 35-73 signal is used to 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 be provided with 5-8 permanent magnets ［ (10-1) * 3.14/5.8=5 at most by 5 centimetres of spacings; (15-1) * 3.14/5.6=8 ］.It is thus clear that patent art can be provided with 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, patent art 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 the boosted vehicle the sort of one fast one slow uncomfortable feeling of prior art.The present invention asks someone according to the experience of reality, when on the annular groove rolling disc 15 permanent magnets being set uniformly roughly, having eliminated prior art basically and has only established 5-8 permanent magnets and make boosted vehicle the sort of one fast one slow uncomfortable feeling; When on the annular groove rolling disc 20 permanent magnets being set uniformly roughly, 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 be provided with 35-73 permanent magnets at most 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 has 4-7 permanent magnets (just there has been a signal position leaving 10 degree angles, summit) in the 35 degree zones of leaving 10-45 degree angle, summit; Then the exportable 4-7 of Hall control signal reacts the power-assisted demand; Can realize any position, have power-assisted just can obtain corresponding power-assisted excellent technique effect 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, and control signal and people's demand is in full accord: a plurality of permanent magnets are fixed on the annular groove rolling disc, and 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, and just in full accord with people's demand, control signal does not have original segmentation sum of errors signal drift problem yet.Even the hall sensing parameter changes, also being that the The whole control signal is parallel moves, as long as reception Hall control signal
Electric machine controllerThe range of receiving broad, the control effect of the Hall control signal that has changed becomes systematicness to change.As be used for morpet, and 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) each permanent magnets
Magnetic flow changes,
Magnetic flow is vicissitudinousPermanent magnets can be represented the state of kinematic motion of specific site: because each permanent magnets
Magnetic flow changes, each permanent magnets makes Hall output peculiar
The peak valley differenceThe control signal of waveform, then peculiar
The peak valley differenceThe control signal of waveform just can direct representation annular groove rolling disc the state of kinematic motion in a certain fixedly permanent magnets site; Like each permanent magnets the specific of oneself arranged all
Magnetic flow, what permanent magnets can reach has, and just can obtain the motion state signal of what specific sites.As be used for morpet, and annular groove rolling disc diameter is in 10-15 centimetre, and the annular groove rolling disc circles, and Hall can obtain the control signal of 35-73 different loci state of kinematic motion, knows the power-assisted demand in 35-73 site naturally.Clearly, the annular groove rolling disc circles, and prior art can only have 5-8 power-assisted demand at most, and being nothing like the maximum available 35-73 of a this patent power-assisted desired signal more can be truly, multiple data quantity ground reaction cyclist's power-assisted demand.That is to say that morpet is used patent art, it is consistent that Che Gengneng and people's demand match, and the cyclist experiences stretcher at any turned position, and oneself is the may command speed of a motor vehicle fully all, and traveling comfort is good.And the morpet of prior art can only be in maximum 5-8 turned positions ability may command speed of a motor vehicle.
The synthetic housing of annular groove rolling disc annular groove reaction plate is in relative rotation used in
(8); Fixed the relative position of Hall with whole permanent magnets; Avoided the outer ambient interference of housing; Improve reliability, the authenticity of hall signal, also made things convenient for installation, debugging, maintenance etc.
Description of drawings
Fig. 1 is many magnetic patch uneven distribution magnetic flow 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 many magnetic patch uneven distribution magnetic flow on the rolling disc, and the highdensity 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, Hall, the 5th, circular rail trace, the 40th, annular groove reaction plate, the 41st, cavity ring, the 42nd, bearing.
The specific embodiment
The sensitive member of many magnetic patch uneven distribution magnetic flow in embodiment 1, the housing
Like Fig. 1,3, with one
Both concave surfaces of annular groove rolling disc 1 and 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 can be chimeric in relative rotation in empty shell, the concave surface of two dishes presss from both sides into a cavity ring 41; In cavity ring 41 positionsBe set with 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 does146---279 (BH) max/KJm
-3 Different selective value in the scope, and it is unequal to face the magnetic flow of permanent magnets 2 mutually.The structure of annular groove rolling disc 1, permanent magnets 2, Hall 3 is following:
All the rounded equably track of permanent magnets 2 distributes, and each permanent magnets 2 is fixed on 9.0 centimetres of circular rail traces 5 of diameter, and promptly each permanent magnets 2 is identical to the distance between identical, the adjacent permanent magnets 2 of distance at circle center, circular rail trace 5 place.
There is the magnetic flow of two permanent magnets 2 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 1 one diameters of rolling disc, and these two permanent magnets 2 are used for the movement position of two stretchers of expression on morpet.
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, promptly 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 ...
Be set with a Hall 3 on the annular groove reaction plate 40 in cavity ring 41,
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 that Hall 3 is located in each permanent magnets 2 place circular rail trace 5 scope; Hall 3 keeps 0.3 centimetre spacing distance with each permanent magnets 2 of rotary state, and each permanent magnets 2 that makes rotation is through Hall 3 time, and Hall 3 can produce a cooresponding square wave electric signal output.
The rotating disc type sensitive member of embodiment 2, many magnetic patch of high density uneven distribution magnetic flow
Like 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 does146---279 (BH) max/KJm
-3 Different selective value in the scope, and it is unequal to face the magnetic flow of permanent magnets 2 mutually. Hall 3 keeps 0.2 centimetre spacing distance with each permanent magnets 2 of rotary state, and each permanent magnets 2 that makes rotation is through Hall 3 time, and Hall 3 can produce a cooresponding square wave electric signal output.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 uneven distribution magnetic flow in the housing; Comprise an 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 two dishes can be chimeric in relative rotation in empty shell, the concave surface of two dishes presss from both sides into a cavity ring (41); On the annular groove rolling disc (1) of cavity ring (41) position, be set with many pieces of permanent magnets (2); The rounded equably track of these many pieces of permanent magnets (2) distributes, and promptly every piece of permanent magnets (2) is identical to the distance between identical, the adjacent permanent magnets of distance (2) at circle center, circular rail trace (5) place; The magnetic polarity of adjacent permanent magnets (2) is opposite, and the magnetic polarity distribution mode that annular groove rolling disc (1) is gone up whole 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 Have at least the magnetic flow of two pieces of permanent magnets (2) inequality;
On the annular groove reaction plate (40) of cavity ring (41), be set with 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 uneven distribution magnetic flow in the housing according to claim 1 is characterized in that: Hall (3) is located between interior circular rail trace and the outer ring trajectory.
3. the sensitive member of many magnetic patch uneven distribution magnetic flow in the housing according to claim 2 is characterized in that: annular groove rolling disc (1) is provided with the center in the circle scope of the interior circular rail trace place of a plurality of permanent magnets (2).
4. according to the sensitive member of many magnetic patch uneven distribution magnetic flow in claim 1 or the 2 or 3 described housings, it is characterized in that: have at least the magnetic flow of one piece of permanent magnets (2) to be not equal to the magnetic flow of other any one piece of permanent magnets (2).
5. the sensitive member of many magnetic patch uneven distribution magnetic flow in the housing according to claim 4 is characterized in that: rolling disc (1) is plastic flagstone, aluminium plate, copper material plate a certain of non-magnet_conductible material.
6. the sensitive member of many magnetic patch uneven distribution magnetic flow 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 (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102635255A CN102826184A (en) | 2012-07-28 | 2012-07-28 | Sensing element with unevenly distributed magnetic fluxes of multiple magnetic blocks in shell |
| CN2013103093728A CN103381873A (en) | 2012-07-28 | 2013-07-23 | Sensing element with unevenly distributed magnetic fluxes of magnet blocks in shell |
| CN201320437943.1U CN203381760U (en) | 2012-07-28 | 2013-07-23 | Magnetic flux sensing element with multiple magnetic blocks non-uniformly distributed in housing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102635255A CN102826184A (en) | 2012-07-28 | 2012-07-28 | Sensing element with unevenly distributed magnetic fluxes of multiple magnetic blocks in shell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102826184A true CN102826184A (en) | 2012-12-19 |
Family
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Family Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012102635255A Pending CN102826184A (en) | 2012-07-28 | 2012-07-28 | Sensing element with unevenly distributed magnetic fluxes of multiple magnetic blocks in shell |
| CN2013103093728A Pending CN103381873A (en) | 2012-07-28 | 2013-07-23 | Sensing element with unevenly distributed magnetic fluxes of magnet blocks in shell |
| CN201320437943.1U Expired - Fee Related CN203381760U (en) | 2012-07-28 | 2013-07-23 | Magnetic flux sensing element with multiple magnetic blocks non-uniformly distributed in housing |
Family Applications After (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013103093728A Pending CN103381873A (en) | 2012-07-28 | 2013-07-23 | Sensing element with unevenly distributed magnetic fluxes of magnet blocks in shell |
| CN201320437943.1U Expired - Fee Related CN203381760U (en) | 2012-07-28 | 2013-07-23 | Magnetic flux sensing element with multiple magnetic blocks non-uniformly distributed in housing |
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| Country | Link |
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| CN (3) | CN102826184A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113359946A (en) * | 2021-06-29 | 2021-09-07 | 歌尔科技有限公司 | Rotation control component, method and device and electronic equipment |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102826184A (en) * | 2012-07-28 | 2012-12-19 | 成都宽和科技有限责任公司 | Sensing element with unevenly distributed magnetic fluxes of multiple magnetic blocks in shell |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999013558A1 (en) * | 1997-09-05 | 1999-03-18 | Southern Refrigeration Group Pty. Ltd. | A brushless d.c. motor |
| JP2001235483A (en) * | 2000-02-24 | 2001-08-31 | Shibaura Mechatronics Corp | Rotation sensor unit |
| CN202783637U (en) * | 2012-07-28 | 2013-03-13 | 成都宽和科技有限责任公司 | Sensing element with non-uniformly distributed fluxes of magnets in shell |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102826184A (en) * | 2012-07-28 | 2012-12-19 | 成都宽和科技有限责任公司 | Sensing element with unevenly distributed magnetic fluxes of multiple magnetic blocks in shell |
| CN102785740B (en) * | 2012-07-28 | 2014-02-05 | 成都宽和科技有限责任公司 | Multi-magnetic block position-adjustable turntable sensing element |
-
2012
- 2012-07-28 CN CN2012102635255A patent/CN102826184A/en active Pending
-
2013
- 2013-07-23 CN CN2013103093728A patent/CN103381873A/en active Pending
- 2013-07-23 CN CN201320437943.1U patent/CN203381760U/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999013558A1 (en) * | 1997-09-05 | 1999-03-18 | Southern Refrigeration Group Pty. Ltd. | A brushless d.c. motor |
| JP2001235483A (en) * | 2000-02-24 | 2001-08-31 | Shibaura Mechatronics Corp | Rotation sensor unit |
| CN202783637U (en) * | 2012-07-28 | 2013-03-13 | 成都宽和科技有限责任公司 | Sensing element with non-uniformly distributed fluxes of magnets in shell |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113359946A (en) * | 2021-06-29 | 2021-09-07 | 歌尔科技有限公司 | Rotation control component, method and device and electronic equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN203381760U (en) | 2014-01-08 |
| CN103381873A (en) | 2013-11-06 |
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Application publication date: 20121219 |