CN203581297U - Rotary disc type sensing element with uneven distribution of magnetic patches - Google Patents
Rotary disc type sensing element with uneven distribution of magnetic patches Download PDFInfo
- Publication number
- CN203581297U CN203581297U CN201320437965.8U CN201320437965U CN203581297U CN 203581297 U CN203581297 U CN 203581297U CN 201320437965 U CN201320437965 U CN 201320437965U CN 203581297 U CN203581297 U CN 203581297U
- Authority
- CN
- China
- Prior art keywords
- permanent magnets
- hall
- rolling disc
- magnetic
- spacing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
Links
Images
Landscapes
- Toys (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
The utility model belongs to the technical field of an application of utilizing magnetic induction to provide a signal and especially relates to a technology of providing a control signal in multi-position via magnetic induction on a rotary part. A plurality of permanent magnetic patches distributed in an annular way are fastened on a rotary disc ; a distance between each two magnetic patches is different; on one surface of the rotary disc, two adjacent magnetic patches have the opposite magnetic polarities; in other words, a distribution method of the magnetic polarities of all the permanent magnetic patches on the surface of the rotary disc is that the N pole and the S pole are arranged at intervals; at least one permanent magnetic patch is L-shaped; and a Hall sensor is close to the permanent magnetic patches. The rotary disc type sensing element with the uneven distribution of the magnetic patches is advantageous in that with an opposite distribution method of N pole and S pole formed by adjacent permanent magnetic patches, a rectangular wave signal can be acquired by the Hall sensor, thereby facilitating digital processing of the signal; and with different distances between the permanent magnetic patches, a position of the permanent magnetic patches on the rotary disc can be displayed on the rectangular signal, so uses of different rectangular signals can be determined.
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 < < of Yebao Vehicle Material Industry's application hook pawl formula moment sensor > > and disclose a kind of morpet sensing device, sensing device comprises that magnetic part and elastic component coordinate, and experience the sensing device of moment.After period of service is long, the elasticity modulus variation of elastic component will cause the control effect of transducing signal and controlled motor to change, and 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, no touch detects the power of pedaling, speed and turning to, this device is in relative motion, on outer wheel disc, establish respectively magnetic sheet, on interior wheel disc, there is spring, in, between outer wheel disc, use spring reset, in surveying with two Halls on support, the electric signal that on outer wheel disc, the magnetic sheet of relative motion produces represents to pedal power, speed and turning to.
Shortcoming (1) is not durable with elastic component: after period of service is long, the elasticity modulus variation of elastic component will cause the control effect of transducing signal and controlled motor to change, and 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 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 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, be only simply from being provided with again identical magnetic sheet group at interior diverse location of taking turns, the position separately that can not represent different magnetic sheet groups, the state of kinematic motion that can not represent ad-hoc location, and people is by bike time, pedal with each position corresponding with pedal at state of kinematic motion, there is own special power-assisted demand, 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 pedal.
Each site signal indifference of shortcoming (3) makes man-machine mismatching: each magnetic sheet group is the same, each magnetic sheet group can not represent this position of magnetic sheet group on interior 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 the demand of different foot positions to power-assisted, cause the demand of power-assisted and provide the time of power-assisted to mismatch, man-machine cooperation is undesirable.
Shortcoming sine wave output makes magnetic sheet group Edge Distance can not be less than 4 centimetres, generally take 5 centimetres as good, and make to establish magnetic sheet group number very little, man-machine cooperation is undesirable: each magnetic sheet group is identical, Hall output is that sinusoidal waveform is as control signal, as control signal sinusoidal waveform, must there is certain peak valley difference, because the magnetic sheet group of this patent needs certain length to represent forward and reverse motion, at diameter, be to establish at most 8 magnetic sheet groups in the rolling disc circular trace of 20 centimetres, generally take 5 as good, Hall just can have the sine wave signal of controlling function.That is to say, this technical scheme of 01201843.0 patent, for morpet, magnetic sheet group limited amount is only in 8, and very little, man-machine cooperation is undesirable for control signal.If but more than 8 magnetic sheet groups, when people's treadmill is very fast, the signal graph of Hall output is close to a horizon, this signal is not controlled function, can not control electrical motor, while making it need power-assisted especially, loses assist function.
Shortcoming (5) signal blind zone reaches miter angle, when needing power-assisted during startup, really can not get power-assisted: well-known, it is minimum in summit moment that people steps on bicycle pedal, from leaving 10-45 degree angle, summit, it is the region that needs most power-assisted, but the angle between each magnetic sheet group of this patent is 45 degree, at stretcher, leave summit 10-45 degree angular zone neither one magnetic sheet group, also with regard to 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 complex structure again of elastic component, fit structure feature because of Hall and magnetic sheet group, 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 while starting, and power-assisted demand is not mated with power-assisted is provided, and cyclist's traveling comfort is poor; As increased by force magnetic sheet group quantity, its transducing signal loses again Power assisted control function.
The Chinese patent 03264387.X < < timing sensor of electric boosting bicycle > > of Wang Naikang application discloses without elastic component, only with moving, fixed two rotating disks, above Moving plate, inlay two permanent magnetic steels, above price fixing, inlay three Hall elements, bicycle pedal circles, each Hall produces two pulses, and three Hall elements produce six pulses.Divide folding can obtain three features, four shortcomings are as follows:
Feature (1) is for obtaining six impulse singlas, can only be each permanent magnetic steel same pole in one side: each Hall will produce two pulses, can only be the same face that the same pole of two permanent magnetic steels is located at Moving plate,, in certain one side of Moving plate, two permanent-magnet magnetic steel capital be the Huo Doushi South Pole, the arctic.If at the same face of Moving plate, a permanent magnetic steel is the arctic, another is the South Pole, and 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 recorded.In order to increase pulse count, improve and control effect, can only be that each permanent magnetic steel same pole is in one side.
Feature (2) permanent magnetic steel is used for representing pedal fixed position, three Halls represent pedal travel position: because pedal and Moving plate are to synchronize rotation, so a permanent magnetic steel is fixed respectively in two positions on the Moving plate corresponding with two pedals, where some pedals turn, and where corresponding permanent magnetic steel also turns; But only turn in the position that has Hall, could send control signal by Hall, the motor of commander's morpet produces the power-assisted needing and rotates.
The position of feature (3) middle different period pedal travels because Hall can not represent to circle, just can not be only with a Hall: the different periods of pedal in circling, power-assisted demand is had to 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 has Hall, and this Hall represents that with regard to output signal pedal has arrived the position of this Huo Yuan.But there is again shortcoming below with a plurality of Halls.
These features as morpet sensor have three shortcomings:
Shortcoming (1) represents respectively the fixed position of two pedals with two permanent magnetic steels that there is no an otherness, just can only represent with a plurality of Halls the turned position of 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 pin, make the raw power-assisted demand of its left and right human hair combing waste, 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 to have original segmentation error, make the distortion of power-assisted demand model, naturally produce power-assisted output inconsistent with power-assisted demand: no matter morpet is one or two motor, its transducing signal of controlling motor can only just can reach the object of controlling motor with a transducing signal input electric machine controller; And three Halls are controlled motors for this patent, three control signals of three Halls must be merged into one and could input electric machine controller after merging control signal.The parameter sensing of three Halls can not be the same, particularly due to after variation of ambient temperature, period of service length, the parameter sensing of three Halls may be widely different, when its result causes identical power-assisted demand, the output of different Halls be different voltages, cause motor to produce different power-assisted output, power-assisted output is inconsistent with 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, making to merge control signal does not mate with electric machine controller, power-assisted demand model distortion: due to variation of ambient temperature, after period of service is long, the parameter sensing of three Halls may be widely different, three control signal point of connection of three Halls must change, the merging control signal that identical power-assisted demand produces will produce the signal drift of segmenting, merge control signal as a whole signal distortion that produces, it is 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 sensing site can not arbitrarily increase, sensing site very little, motor operation is just not steady, make people by bike feel very uncomfortable: owing to having shortcoming (1) and shortcoming (2) all to cause because Hall quantity is greater than one, 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, when needing power-assisted during startup, really can not get power-assisted: well-known, it is minimum in summit moment that people steps on bicycle pedal, from leaving 10-45 degree angle, summit, it is the region that needs most power-assisted, but the angle between each Hall of this patent is 42.5-43.5 degree, at stretcher, leave summit 10-42 degree angular zone neither one Hall, also with regard to 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 with a plurality of Halls, to control the technical scheme of assistant mode, 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 you, Hall small number and to produce motor operation just not steady, make people by bike feel very uncomfortable, and can not get power-assisted while starting.Make it want power-assisted demand model undistorted, and want motor to operate steadily in these two problems and always attend to one thing and lose sight of another, can not get both.
International Patent Application WO/099/13558AI discloses the sensor rotating for controlling electrical motor on electrical motor, this sensor is that depression is set on rolling disc, permanent magnets is entrapped in the depression of rolling disc, permanent magnets is cylindrical, a permanent magnets can only make Hall obtain a kind of magnetic induction density, a sensor only has a kind of sensing model, can not regulate on demand at any time being controlled the control model of thing.
Summary of the invention
The purpose of this utility model is only to provide by each permanent magnets on a Hall and rolling disc and obtains the sensitive member that speed and acceleration signal and sensor can be adjusted to multiple sensing model, a kind of in can induction region, can increase permanent magnets quantity as far as possible, utilize to greatest extent rolling disc displacement information, how again output information pinpoint sensitive member.Use, on morpet, is measured moment without elastic component and other machinery, also can make power-assisted demand mate well with the power-assisted providing, the morpet sensor sensitive member that motor operates steadily.
Design of the present utility model is: a sensor can be adjusted to multiple sensing model, as long as permanent magnets is made to " L " shape, rotate the grafting handle of " L " shape, the eccentric magnetic patch of " L " shape just produces different magnetic induction density to Hall, make Hall export different transducing signals, obtain different control models.In a Hall can receptive field, on a rolling disc, by a plurality of permanent magnets, carry out different variation pattern settings, make an one Hall can experience the motor message of whole permanent magnets.The variation pattern of a plurality of permanent magnets is mainly that magnetic polarity changes, change in location, object make Hall can obtain ad-hoc location more accurately, control with better function, more permanent magnets motor message.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, controls with better function, more; It is more accurate that a plurality of permanent magnets change in location make signal that Hall produces can express the position of permanent magnets, thereby can express the state of kinematic motion of 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 rotating disc type sensitive member of many magnetic patch uneven distribution, comprise a rolling disc 1 and a plurality of permanent magnets 2, it is characterized in that: on rolling disc 1, be fixedly installed a plurality of permanent magnets 2,2 one-tenth annular arrangements of a plurality of permanent magnets distribute, and 2 one-tenth of a plurality of permanent magnets are dislocatedly distributed, being dislocatedly distributed is radius mode or spacing a certain of mode that be dislocatedly distributed that be dislocatedly distributed; Or there are the radius mode that is dislocatedly distributed, an array mode that has again spacing to be dislocatedly distributed;
The radius mode of being dislocatedly distributed is: the plurality of permanent magnets 2 is distributed in annular arrangement 6 scopes, between the interior circular trajectory 5-1 of annular arrangement 6 and outer ring trajectory 5-2, has at least a circular rail trace to run through whole permanent magnets 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 adjacent permanent magnets 2 is permanent magnets spacing 7; Have at least the length of two permanent magnets spacing 7 not identical;
In certain one side of rolling disc 1, the magnetic polarity of adjacent permanent magnets 2 is contrary, and simultaneously to go up the magnetic polarity distribution mode of whole 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 for certain of rolling disc 1
Has one piece of permanent magnets 2 at least for " L " shape permanent magnets 2-1, " L " shape permanent magnets 2-1 is " L " shape that grafting handle 2-2 and eccentric magnetic patch 2-3 form, grafting handle 2-2 is inserted in the hole of rolling disc 1, and eccentric magnetic patch 2-3 is located on the rolling disc 1 of Hall 3 sides;
Also comprise a Hall 3, certain one or both sides that Hall 3 is positioned at rolling disc 1 have Hall 3, and Hall 3 is located at the position that approaches permanent magnets 2, between Hall 3 and permanent magnets 2, have spacing; Hall 3 is opposite magnetic polarities to be produced to the Hall of square wave output signal.
Rolling disc 1 can be the on-deformable plate of material such as plastic flagstone, the exhausted plate of high strength, copper coin, aluminium sheet.While using sensitive member, rolling disc 1 will rotate, and the center of rotation is exactly Yuan center, 2 one-tenth annular arrangement distribution places of a plurality of permanent magnets.
A plurality of permanent magnets 2 are in annular arrangement 6 scopes, the object that becomes annular arrangement to distribute is only with a Hall 3, to experience the state of kinematic motion of whole permanent magnets 2 on rolling disc, experience movement position and the speed of whole permanent magnets 2 on 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 rolling disc 1 that whole permanent magnets 2 is separately fixed at rolling disc, the continuous electric signal that Hall 3 produces just can be expressed the state of kinematic motion of rolling disc again.If this continuous electric signal is used for controlling other object, this continuous electric signal is exactly control signal.If for controlling the motor of morpet, also need with micro controller system or other electron component as sensing signal processor, position in control signal, speed, acceleration/accel key element are converted to the power-assisted signal that needs power-assisted how many, the function converting is exactly power-assisted demand model, or claims power-assisted model.
2 one-tenth meanings that are dislocatedly distributed of a plurality of permanent magnets are: making in electric signal that Hall 3 produces is not duplicate impulse singla, but the different impulse singla of pulse width, with distinguishing impulse singla, distinguish the diverse location of permanent magnets 2, thereby can obtain the state of kinematic motion of diverse location permanent magnets 2.Reaching can certain position of accurate expression rolling disc, or each has the state of kinematic motion of permanent magnets 2.As for morpet, can ride the demand to power-assisted at diverse location by accurate expression, make the expression of power-assisted demand more accurate, car is just more consistent with people's cooperation.
The permanent magnets 2 radius modes of being dislocatedly distributed are: the permanent magnets 2 having is close to the center of turn of rolling disc, and some permanent magnets 2 are away from the center of turn of 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 outer ring trajectory 5-2.For guaranteeing that Hall 3 can produce electric signal, in requiring in structure, between circular trajectory 5-1 and outer ring trajectory 5-2, have at least a circular rail trace to run through whole permanent magnets 2.Have at least two permanent magnets 2 not identical to the distance at circle center, interior circular trajectory 5-1 place, certainly distance that can each permanent magnets 2 Dao Yuan center is not identical, 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 a rolling disc position.
The permanent magnets 2 spacing modes of being dislocatedly distributed are: using the outward flange of permanent magnets 2 as the basis of measuring spacing, have at least the length of two permanent magnets spacing 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 a rolling disc position.
Hall 3 is located at the position that approaches permanent magnets 2 and can experience permanent magnets 2 magnetic flow, and object is to experience with Hall 3 state of kinematic motion of permanent magnets 2, thereby experiences the state of kinematic motion of rolling disc 1, i.e. movement position, speed, acceleration/accel.
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 output, because the rolling disc stopping as limited size, rotating and within one week, will obtain as far as possible many accurate variable signals, 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 as far as possible many signals that has control meaning.The contrary structure generation square wave of magnetic polarity of adjacent permanent magnets 2, and the identical structure generation sinusoidal waveform of the magnetic polarity of adjacent permanent magnets 2, during especially for morpet, as the rolling disc of sensing element, generally placing restrictions at diameter is 10-15 centimetre, in this limit scope, to obtain the signal of controlling function, rotate one week, produce square wave than producing the many 7-9 of the available pulse number of sinusoidal waveform doubly.Nature, to the control effect of morpet more, people coordinates with car better for the magnetic polarity of adjacent permanent magnets 2 contrary structure, and rider people feels more comfortable.
By the object of " L " shape permanent magnets 2-1, be: the eccentric magnetic patch 2-3 position that can easily change " L " shape permanent magnets 2-1, thereby change near the magnetic flow of the diverse location of " L " shape permanent magnets 2-1, change with the magnetic flow of diverse location, make Hall 3 produce different output wave shapes, and obtain different control models.In the immovable condition of each parts of sensitive member, the relative position of eccentric magnetic patch 2-3 that can be by changing " L " shape permanent magnets 2-1 on rolling disc 1, produces different output wave shapes and change Hall 3, and obtains different control models.Multiplex if several " L " shape permanent magnets 2-1, the different permutation and combination of the eccentric magnetic patch 2-3 of several " L " shape permanent magnets 2-1, can obtain a large amount of different Hall 3 output wave shapes, thereby obtain a large amount of different control models.Realize a sensitive member at different time, the object of exportable a large amount of different output wave shapes.
Hall 3 is located between interior circular trajectory 5-1 and outer ring trajectory 5-2.Because Hall 3 is to have spacing to experience permanent magnets 2 magnetic flow and the parts of output electrical signals, again in order to reduce the volume of permanent magnets 2 as far as possible, make its many permanent magnets 2 that arrange as far as possible on rolling disc 1, the permanent magnets 2 as far as possible reducing can be responded to by Hall 3; Hall 3 should be located between interior circular trajectory 5-1 and outer ring trajectory 5-2, and is preferably located at the position that approaches the circular rail trace that can run through whole permanent magnets 2.
The cross-sectional plane of grafting handle 2-2 is a certain of equilateral triangle, equilateral quadrangle, equilateral pentagon or equilateral hexagon, on rolling disc 1 for the cross-sectional plane in the hole of this grafting handle 2-2 that pegs graft, its size and shape is same as the cross-sectional plane of this grafting handle 2-2, and the shape of cross section for the hole of this grafting handle 2-2 that pegs graft on the isometric polygon-shaped and rolling disc 1 of the handle 2-2 cross-sectional plane of pegging graft matches.The equilateral geometric figure that on the cross-sectional plane of grafting handle 2-2 and rolling disc 1, the cross-sectional plane in hole matches by shape, object is that grafting handle 2-2 can extract rear change angle out and inserts in the hole of same rolling disc 1 again, make near the hole site of this rolling disc 1, the sensitive magnetic flow of Hall 3 to be changed, Hall 3 can be exported different waveform signals.
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 rolling disc 1 will be set on a turning cylinder and use, on rolling disc 1, will establish a hole that wears turning cylinder; For guaranteeing that rolling disc 1 is when rotating with turning cylinder, Hall 3 can be experienced the motor message of each permanent magnets 2 on rolling disc 1, on rolling disc 1, wear the center that hole should be located at the interior circular trajectory 5-1 place circle scope of a plurality of permanent magnets 2, because interior circular trajectory 5-1 and outer ring trajectory 5-2 are concentric circles, certainly wear the center of circular rail trace 5-2 place circle scope outside, hole, wearing 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, to can be nested with the turning cylinder of the shapes such as square, triangle, but the interior sky of centre hole necessarily comprises Yuan center, interior circular trajectory 5-1 place, could use a Hall 3 to experience the motor message of whole permanent magnets 2 on rolling disc 1 rolling disc.
Have at least the length of a permanent magnets spacing 7 to be not equal to other any one permanent magnets spacing 7.Be not equal to other length, the permanent magnets spacing 7 of particular length can be used for representing the position of bicycle pedal.Preferably have at least the length of two permanent magnets spacing 7 to be not equal to other any one permanent magnets spacing 7, the permanent magnets spacing 7 of these two particular length corresponds respectively to two stretchers, for representing the position of two stretchers of bicycle.Because the circular movement of bicycle pedal, judges that pedal position is for the speed that obtains this circular movement, determine that the power-assisted model of circular movement is extremely important next time.
Rolling disc 1 is plastic flagstone, aluminum board, copper material plate a certain of non-magnet_conductible material.Because the utility model is the contrary 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 have control function.Plastic flagstone, aluminum board, the copper material plate of handy non-magnet_conductible material, or other on-deformable rolling disc.
Advantage of the present utility model: simple in structure, cost is low, the permanent magnets quantity on permanent magnets ring is not placed restrictions on, the impulse singla of outputting standard, there is no 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 drift about, by permanent magnets change in location, represent can have in fixed position, place, output signal the movement position of each permanent magnets, for morpet, make power-assisted output can highly coordinate with power-assisted demand and cyclist is felt well.
The 1 convenient output wave shape that changes: under the immovable condition of each parts of sensitive member, the rotational angle of eccentric magnetic patch that can be by changing " L " shape permanent magnets on rolling disc 1, and make the different output wave shape of Hall 3 generation, and obtain different control models.Be that signal model changes, just can select different signal models to control and be controlled object, realize personalized control.As for morpet, can be according to the strength of different people, or the custom of exerting oneself, ride over Plain or mountain region and select applicable signal model, there is the function that regulates at any time power-assisted by personalization.
2 is simple in structure, without elastic component, machinery-free fault: experience a plurality of permanent magnets with Hall and rotate output signal, the speed providing with Chinese patent 01201843.0 can be calculated the principle of moment, available multiple math modeling is calculated the moment parameter of morpet, for controlling the motor of morpet, realize power-assisted.Without elastic component, simple in structure, cost lower than with elastic component and mechanically stressed sensor.Each mechanical part distortion, machinery-free fault, the not good problem of cooperation have been avoided after long-time use.
3 magnetic polarities are contrary, output square-wave signal, there is accurate control function: because the magnetic polarity of adjacent permanent magnets is contrary, and Hall is selected the Hall that opposite magnetic polarities is produced to square wave output signal, no matter spacing is how many for adjacent permanent magnets, even very close to each other between adjacent permanent magnets, Hall can be exported square-wave signal too.As for morpet, the motor of controlling morpet with the output signal of square wave is better than with sinusoidal waveform, because rectangle wave energy is accomplished signal point at any time, the signal implication that represents movement position and speed is accurate, thereby movement position and speed that can Precise Representation booster bicycle pedal, to go out the correct power-assisted demand of this state of kinematic motion with the accurate position of pedal and speed calculation.
The magnetic polarity of 4 adjacent permanent magnets is contrary, permanent magnets quantity is not placed restrictions on, can increase sensing point position: because magnetic polarity is contrary as far as possible, output square-wave signal, even adjacent permanent magnets gapless, the signal of its output has remained number, differentiable square-wave signal, still has control function, that is to say and can not export the unchanged linear signal of not controlling function.As for morpet, because the rolling disc diameter with pedal linkage is placed restrictions on, just can be on the rolling disc of prescribed level, increase permanent magnets quantity as far as possible, increase sensing point position as far as possible, with as far as possible many transducing signals, represent bicycle pedal movement position and speed, Precise Representation state of kinematic motion.
The magnetic polarity of adjacent permanent magnets is contrary, can arrange that permanent magnets is many, sensing point position is many, the state of kinematic motion of rolling disc is represented accurately: to for morpet, fixedly the rolling disc size of permanent magnets is strictly placed restrictions on, general rolling disc diameter can only be in 10-15 centimetre, in order to make Hall have the magnetic pole signal that obtains permanent magnets under the condition of spacing, the diameter of its permanent magnets is at least Ф 0.6-0.8 centimetre, and the periphery of the rolling disc of diameter 10-15 centimetre is zero-lash arranges 35-73 permanent magnets ［ 10-1*3.14/0.8=35; 15-1*3.14/0.6=73 ］, stretcher circles, and Hall can obtain 35-73 signal for controlling the motor of morpet.But if the identical prior art of adjacent permanent magnets magnetic polarity, adjacent permanent magnets, by 5 centimetres of spacing,, on diameter 10-15 centimetre rolling disc, can only arrange at most 5-8 permanent magnets ［ 10-1*3.14/5.8=5; 15-1*3.14/5.6=8 ］.Visible, the art of this patent can arrange 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 rolling disc circles, the art of this patent has increased 7-9 turn disc site signal doubly than prior art.The electric machine control accuracy rate of morpet has been improved to 7-9 doubly naturally, make 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, is no longer that fast slow uncomfortable sensation of boosted vehicle of prior art.The utility model is asked someone according to actual experience, while roughly 15 permanent magnets being set uniformly on rolling disc, substantially having eliminated prior art and has only established 5-8 permanent magnets and make that fast slow uncomfortable sensation of boosted vehicle; While roughly 20 permanent magnets being set uniformly on rolling disc, car coordinates oneself can meet human needs with people's, and the sensation of riding boosted vehicle is very comfortable.
6 do not have signal blind zone, and power-assisted demand whenever all can obtain the power-assisted matching: this patent can arrange at most 35-73 permanent magnets at the rolling disc periphery of diameter 10-15 centimetre, and between each permanent magnets, average angle is 5-10 degree.For morpet, when starting or move, stretcher is from leaving in the 35 degree regions at 10-45 degree angle, summit, there is 4-7 permanent magnets just to have a signal in the position of leaving 10Du angle, summit, the exportable 4-7 of Hall control signal reacts 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 cyclist feels.
Hall of 7 use, a control signal represents the total movement state of rolling disc, the state of kinematic motion of control signal and rolling disc is in full accord, control signal and people's demand is in full accord: a plurality of permanent magnets are fixed on rolling disc, permanent magnets is synchronizeed and is rotated with rolling disc, with a Hall, experience whole permanent magnets motor messages, the control signal of Hall output and the state of kinematic motion of rolling disc are 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 if hall sensing parameter changes, be also whole control signal parallel, as long as it is wider to receive the range of receiving of electric machine controller of Hall control signal, the control effect of the Hall control signal having changed becomes systematicness to change.As for morpet, 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 cyclist is easy to grasp this power-assisted ability changes.
Between 8 permanent magnets, have dislocation, dislocation permanent magnets can represent the state of kinematic motion of specific site: because permanent magnets is in radial direction dislocation or the dislocation of circular arc line spacing, dislocation permanent magnets makes Hall export the control signal of peculiar wave space, the state of kinematic motion in a certain fixedly permanent magnets site that control signal of peculiar wave space just can direct representation rolling disc; As each permanent magnets has oneself specific dislocation site, can reach and have how many permanent magnets, just can obtain the motion state signal of how many specific sites.As for morpet, rolling disc diameter is in 10-15 centimetre, and rolling disc circles, and Hall can obtain the control signal of 35-73 different loci state of kinematic motion, naturally knows the power-assisted demand in 35-73 site.Clearly, rolling disc circles, and prior art can only have at most 5-8 power-assisted demand, and being nothing like the maximum available 35-73 of a this patent power-assisted desired signal more can be truly, react cyclist's power-assisted demand multiple data quantity.That is to say, morpet the art of this patent, it is consistent that Che Gengneng and people's demand match, and cyclist experiences stretcher at any turned position, and oneself all completely can regulation speed, and traveling comfort is good.And the morpet of prior art can only be at most 5-8 turned positions ability can regulation speed.
Accompanying drawing explanation
Fig. 1 is that on rolling disc, a plurality of N-S of uneven distribution replace permanent magnets, and has the sensitive member structural representation of " L " shape permanent magnets;
Fig. 2 is that on rolling disc, a plurality of N-S of high density uneven distribution replace permanent magnets, and has the sensitive member structural representation of " L " shape permanent magnets;
Fig. 3 is the sensitive member structural representation that the eccentric magnetic patch of Fig. 1 " L " shape permanent magnets has been conditioned angle;
Fig. 4 is cross-sectional view of the present utility model;
Fig. 5 is the structural representation of " L " shape permanent magnets.
In figure, 1 is rolling disc, the 2nd, and permanent magnets, 2-1 are that " L " shape permanent magnets, 2-2 are that grafting handle, 2-3 are eccentric magnetic patch, the 3rd, and Hall, 5-1 are that interior circular trajectory, 5-2 are outer ring trajectories, the 6th, annular arrangement, the 7th, permanent magnets spacing.
The specific embodiment
The rotating disc type sensitive member of embodiment 1, many magnetic patch uneven distribution
As a face of highstrenghtpiston's rolling disc 1 of 10.0 centimetres of Fig. 1,3,4,5, diameters arranges 20 permanent magnets 2 of 0.8 centimetre of diameter, magnetic flow is 146---279 (BH) max/KJm
-3in some values.The structure of rolling disc 1, permanent magnets 2, Hall 3 is as follows:
Each permanent magnets 2 is fixed on circular trajectory 5-1 in 8.5 centimetres of diameters, in annular arrangement 6 scopes between 9.5 centimetres 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 spacing of a plurality of permanent magnets to be dislocatedly distributed.
The radius mode of being dislocatedly distributed is: the plurality of permanent magnets 2 is distributed in annular arrangement 6 scopes, between the interior circular trajectory 5-1 of annular arrangement 6 and outer ring trajectory 5-2, has at least a circular rail trace to run through whole permanent magnets 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 adjacent permanent magnets 2 is permanent magnets spacing 7; Have at least the length of two permanent magnets spacing 7 not identical.
Have the length of two permanent magnets spacing 7 to be not equal to the length of other any one permanent magnets spacing 7, and the length of these two permanent magnets spacing 7 is also unequal.The position that has two permanent magnets 2 at these two permanent magnets spacing 7 places is just in time at the two ends of 1 one diameters of rolling disc, and these two permanent magnets 2 for representing the movement position of two stretchers on morpet.
The contrary mode of magnetic polarity in 2 one-tenth adjacent permanent magnets 2 of whole permanent magnets of a face setting of rolling disc 1 is arranged, and on rolling disc 1 face, 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 ...
Have one piece of permanent magnets 2 for " L " shape permanent magnets 2-1, " L " shape permanent magnets 2-1 is " L " shape that grafting handle 2-2 and eccentric magnetic patch 2-3 form, and grafting handle 2-2 is inserted in the hole of rolling disc 1, and eccentric magnetic patch 2-3 is located on the rolling disc 1 of Hall 3 sides;
The cross-sectional plane of grafting handle 2-2 is equilateral hexagon, on rolling disc 1 for the cross-sectional plane in the hole of this grafting handle 2-2 that pegs graft, its size and shape is same as the cross-sectional plane equilateral hexagon of this grafting handle 2-2, and the shape of cross section for the hole of this grafting handle 2-2 that pegs graft on the isometric polygon-shaped and rolling disc 1 of the handle 2-2 cross-sectional plane of pegging graft matches.
With a Hall 3, be located at the side that rolling disc 1 has permanent magnets 2, Hall 3 is located at the position that approaches permanent magnets 2, be Hall 3 be located at each permanent magnets 2 circular rail trace 5-1 and annular arrangement 6 scopes between outer ring trajectory 5-2 in, Hall 3 keeps the spacing distance of 0.3 centimetre with each permanent magnets 2 of rotary state, make each permanent magnets 2 of rotating when through Hall 3, Hall 3 can produce a corresponding square wave electric signal output.
Rolling disc 1 is provided with centre hole at the interior circular trajectory 5-1 center of these whole permanent magnets 2, and centre hole is used for being enclosed within the pedal axis of morpet or runner rotating shaft.
The rotating disc type sensitive member of embodiment 2, high density magnetic patch uneven distribution
As a face of the high strength aluminium rolling disc 1 of 10.0 centimetres of Fig. 2,3,4,5, diameters arranges 40 permanent magnets 2 of 0.6 centimetre of diameter.The magnetic flow of permanent magnets 2 is 146---279 (BH) max/KJm
-3in some values, Hall 3 keeps the spacing distance of 0.2 centimetre with each permanent magnets 2 of rotary state, makes each permanent magnets 2 of rotating when through Hall 3, Hall 3 can produce a corresponding square wave electric signal output.The structure of other rolling disc 1, permanent magnets 2, Hall 3 is same as embodiment 1.
Claims (6)
1. the rotating disc type sensitive member of more than magnetic patch uneven distribution, comprise a rolling disc (1) and a plurality of permanent magnets (2), it is characterized in that: on rolling disc (1), be 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, being dislocatedly distributed is radius mode or spacing a certain of mode that be dislocatedly distributed that be dislocatedly distributed; Or there are the radius mode that is dislocatedly distributed, an array mode that has again spacing to be dislocatedly distributed;
The radius mode of being dislocatedly distributed is: the plurality of permanent magnets (2) is distributed in an annular arrangement (6) scope, between the interior circular trajectory (5-1) of annular arrangement (6) and outer ring trajectory (5-2), has at least a circular rail trace to run through whole permanent magnets (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 adjacent permanent magnets (2) is permanent magnets spacing (7); Have at least the length of two permanent magnets spacing (7) not identical;
In certain one side of rolling disc (1), the magnetic polarity of adjacent permanent magnets (2) is contrary, and simultaneously to go up the magnetic polarity distribution mode of whole 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 for certain of rolling disc (1)
Having one piece of permanent magnets (2) at least is " L " shape permanent magnets (2-1), " L " shape permanent magnets (2-1) is " L " shape of grafting handle (2-2) and eccentric magnetic patch (2-3) composition, grafting handle (2-2) is inserted in the hole of rolling disc (1), and eccentric magnetic patch (2-3) is located on the rolling disc (1) of Hall (3) side;
Also comprise a Hall (3), certain one or both sides that Hall (3) is positioned at rolling disc (1) have Hall (3), and Hall (3) is located at the position that approaches permanent magnets (2), between Hall (3) and permanent magnets (2), have spacing; Hall (3) is opposite magnetic polarities to be produced to the Hall of square wave output signal.
2. the rotating disc type sensitive member of many magnetic patch uneven distribution according to claim 1, it is characterized in that: the cross-sectional plane of grafting handle (2-2) is a certain of equilateral triangle, equilateral quadrangle, equilateral pentagon or equilateral hexagon, the cross-sectional plane in the upper hole for this grafting handle (2-2) of pegging graft of rolling disc (1), its size and shape is same as the cross-sectional plane of this grafting handle (2-2), and the shape of cross section in the upper hole for this grafting handle (2-2) of pegging graft of isometric polygon-shaped and rolling disc (1) of handle (2-2) cross-sectional plane of pegging graft matches.
3. the rotating disc type sensitive member of many magnetic patch uneven distribution according to claim 2, is characterized in that: Hall (3) is located between interior circular trajectory (5-1) and outer ring trajectory (5-2).
4. the rotating disc type sensitive member of many magnetic patch uneven distribution according to claim 3, is characterized in that: 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).
5. according to the rotating disc type sensitive member of the many magnetic patch uneven distribution described in claim 1 or 2 or 3 or 4, it is characterized in that: have at least the length of a permanent magnets spacing (7) to be not equal to other any one permanent magnets spacing (7).
6. the rotating disc type sensitive member of many magnetic patch uneven distribution according to claim 5, is characterized in that: rolling disc (1) is plastic flagstone, aluminum board, copper material plate a certain of non-magnet_conductible material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320437965.8U CN203581297U (en) | 2012-07-28 | 2013-07-23 | Rotary disc type sensing element with uneven distribution of magnetic patches |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102634657A CN102795299A (en) | 2012-07-28 | 2012-07-28 | Rotating disc type sensing element with a plurality of unevenly distributed magnet blocks |
| CN201210263465.7 | 2012-07-28 | ||
| CN201320437965.8U CN203581297U (en) | 2012-07-28 | 2013-07-23 | Rotary disc type sensing element with uneven distribution of magnetic patches |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203581297U true CN203581297U (en) | 2014-05-07 |
Family
ID=47194662
Family Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012102634657A Pending CN102795299A (en) | 2012-07-28 | 2012-07-28 | Rotating disc type sensing element with a plurality of unevenly distributed magnet blocks |
| CN201310309422.2A Expired - Fee Related CN103387034B (en) | 2012-07-28 | 2013-07-23 | The rotating disc type sensing element of many magnetic piece uneven distribution |
| CN201320437965.8U Withdrawn - After Issue CN203581297U (en) | 2012-07-28 | 2013-07-23 | Rotary disc type sensing element with uneven distribution of magnetic patches |
Family Applications Before (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012102634657A Pending CN102795299A (en) | 2012-07-28 | 2012-07-28 | Rotating disc type sensing element with a plurality of unevenly distributed magnet blocks |
| CN201310309422.2A Expired - Fee Related CN103387034B (en) | 2012-07-28 | 2013-07-23 | The rotating disc type sensing element of many magnetic piece uneven distribution |
Country Status (1)
| Country | Link |
|---|---|
| CN (3) | CN102795299A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103387034A (en) * | 2012-07-28 | 2013-11-13 | 成都宽和科技有限责任公司 | Rotary disc type sensing element with unevenly distributed magnets |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4745345A (en) * | 1986-12-02 | 1988-05-17 | Camatec Corporation | D.C. motor with axially disposed working flux gap |
| EP1612564A3 (en) * | 2001-09-11 | 2009-12-09 | JTEKT Corporation | Magnetic pulser ring |
| JP4518818B2 (en) * | 2004-03-17 | 2010-08-04 | 三菱電機株式会社 | Torque sensor |
| US7411366B2 (en) * | 2006-11-13 | 2008-08-12 | Matsushita Electric Industrial Co., Ltd. | Electric power-assist system for manually-operated vehicle |
| BRPI0812593B8 (en) * | 2007-06-06 | 2023-01-10 | Hydro Aire Inc | ANGULAR POSITION SENSOR AND METHOD TO DETERMINE ANGULAR POSITION |
| JP2009288158A (en) * | 2008-05-30 | 2009-12-10 | Aisin Seiki Co Ltd | Rotation angle detecting device |
| CN202783652U (en) * | 2012-07-28 | 2013-03-13 | 成都宽和科技有限责任公司 | Rotating disc type sensing element with a plurality of magnetic blocks uneven in position distribution |
| CN102795299A (en) * | 2012-07-28 | 2012-11-28 | 成都宽和科技有限责任公司 | Rotating disc type sensing element with a plurality of unevenly distributed magnet blocks |
-
2012
- 2012-07-28 CN CN2012102634657A patent/CN102795299A/en active Pending
-
2013
- 2013-07-23 CN CN201310309422.2A patent/CN103387034B/en not_active Expired - Fee Related
- 2013-07-23 CN CN201320437965.8U patent/CN203581297U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103387034A (en) * | 2012-07-28 | 2013-11-13 | 成都宽和科技有限责任公司 | Rotary disc type sensing element with unevenly distributed magnets |
| CN103387034B (en) * | 2012-07-28 | 2016-07-06 | 成都宽和科技有限责任公司 | The rotating disc type sensing element of many magnetic piece uneven distribution |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103387034A (en) | 2013-11-13 |
| CN102795299A (en) | 2012-11-28 |
| CN103387034B (en) | 2016-07-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203381759U (en) | Rotating disc type sensing element with multiple magnet blocks and non-uniformly distributed magnetic flux | |
| CN202783674U (en) | Rotating disc type sensing element with a plurality of magnetic blocks uneven in magnetic flux distribution | |
| CN103381871B (en) | Many magnetic sheets well-distributed rotating disc type sensitive member | |
| CN102785740B (en) | Multi-magnetic block position-adjustable turntable sensing element | |
| CN202783649U (en) | Sensing element with position-adjustable magnets in shell | |
| CN102826164B (en) | Sensing element provided with magnetic blocks with adjustable positions in shell | |
| CN203581297U (en) | Rotary disc type sensing element with uneven distribution of magnetic patches | |
| CN203381760U (en) | Magnetic flux sensing element with multiple magnetic blocks non-uniformly distributed in housing | |
| CN203414089U (en) | Sensing element with multiple magnetic sheet positions and magnetic fluxes unevenly distributed in shell | |
| CN103381874B (en) | The rotating disc type sensitive member of many magnetic sheets and magnetic flow all uneven distribution | |
| CN203410586U (en) | Sensing element with shell internally provided with multiple unevenly distributed magnetic blocks | |
| CN102826179B (en) | Sensing element with adjustable positions and magnetic fluxes of magnetic blocks in shell | |
| CN202783665U (en) | Rotating disc type sensing element with a plurality of magnetic blocks adjustable in position and magnetic flux | |
| CN203381758U (en) | Sensing element with multiple magnetic sheets uniformly distributed in housing | |
| CN202783652U (en) | Rotating disc type sensing element with a plurality of magnetic blocks uneven in position distribution | |
| CN202783638U (en) | Rotating disc type sensing element with a plurality of magnetic blocks uneven in magnetic flux and position distribution | |
| CN202794212U (en) | Rotating disk type sensing element with a plurality of position-adjustable magnetic patches | |
| CN202783651U (en) | Sensing element with adjustable magnet position and fluxes in shell | |
| CN202847951U (en) | Rotating disc type sensing element with multi-magnetic block evenly distributed | |
| CN202783637U (en) | Sensing element with non-uniformly distributed fluxes of magnets in shell | |
| CN202783643U (en) | Sensing element with uniformly distributed magnets in shell | |
| CN102826176B (en) | Turntable sensing element with adjustable magnetic fluxes of magnetic blocks and points | |
| CN202783630U (en) | Sensing element with non-uniformly distributed magnets and fluxes in shell | |
| CN202783641U (en) | Sensor unit with multiple magnets uniformly distributed in casing | |
| CN202783632U (en) | Boosting bicycle rotating disc type sensor with multiple magnetic blocks in uniform distribution |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140507 Effective date of abandoning: 20160706 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |