CN203581298U - Rotary disc type sensing element with even distribution of magnetic sheets - Google Patents
Rotary disc type sensing element with even distribution of magnetic sheets Download PDFInfo
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- CN203581298U CN203581298U CN201320437966.2U CN201320437966U CN203581298U CN 203581298 U CN203581298 U CN 203581298U CN 201320437966 U CN201320437966 U CN 201320437966U CN 203581298 U CN203581298 U CN 203581298U
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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 sheets are stuck on a rotary disc in an annular way; on one surface of the rotary disc, two adjacent magnetic sheets have the opposite magnetic polarities; in other words, a distribution method of the magnetic polarity of all the permanent magnetic sheets on the surface of the rotary disc is that the N pole and the S pole are arranged at intervals; clamping magnetic sheet layers are stuck on the surface of the rotary disc with the permanent magnetic sheets and the surface of each permanent magnetic sheet; and a Hall sensor is close to the permanent magnetic sheet. The rotary disc type sensing element with the uneven distribution of the magnetic sheets is advantageous in that with an opposite distribution method of N pole and S pole formed by adjacent permanent magnetic sheets, a rectangular wave signal can be acquired by the Hall sensor, thereby facilitating digital processing of the signal.
Description
technical field
The utility model belongs to magnetic induction provides the technical field of signal, particularly relates on rotatable parts, and carrying out multi-point magnetic induction provides the technology of 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 with people's power-assisted and need to mismatch.And by the project organization complexity 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 patch, 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 patch 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 with people's power-assisted and need to mismatch, complex structure, and cost is high.
Shortcoming (2) sine wave output makes magnetic patch group Edge Distance can not be less than 4 centimetres, generally take 5 centimetres as good, and make to establish magnetic patch group number very little, man-machine cooperation is undesirable: each magnetic patch 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 needing certain length, the magnetic patch group of this patent represents forward and reverse motion, at diameter, be to establish at most 8 magnetic patch 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 patch group limited amount is only in 8, and very little, man-machine cooperation is undesirable for control signal.If but more than 8 magnetic patch 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 (3) signal blind zone reaches miter angle, when needing power-assisted during startup, really can not get power-assisted: well-known, people steps on bicycle pedal in summit moment minimum, from leaving 10-45 degree angle, summit, it is the region that needs most power-assisted, but the angle between the each magnetic patch group of this patent is 45 degree, at stretcher, leave summit 10-45 degree angular zone neither one magnetic patch 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, because of the fit structure feature of Hall and magnetic patch group, rotating disk size diameter is in 20 centimetres, and having placed restrictions on magnetic patch group quantity is 8 groups, and magnetic patch group number can not arbitrarily increase, make man-machine cooperation undesirable, and start time can not get power-assisted, power-assisted demand is not mated with power-assisted is provided, cyclist's traveling comfort is poor; As increased by force magnetic patch 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 multiple Halls.
As these features of morpet sensor, have three shortcomings:
Shortcoming (1) is with two fixed positions that do not have the permanent magnetic steel of otherness to represent respectively two pedals, just can only represent with multiple 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 multiple Halls, thus can not be only with a Hall, and must use multiple 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 Hall control motors for this patent must be merged into one three of a three Halls control signal and merge after control signal and could input electric machine controller.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 and produce signal distortion as an entirety, 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, people steps on bicycle pedal in summit moment minimum, from leaving 10-45 degree angle, summit, it is the region that needs most power-assisted, but the angle between the 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 the technical scheme with multiple Hall control assistant modes, because can only represent with multiple Halls the turned position of pedal, multiple control signals of multiple 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 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, this technique is bored depression on rolling disc, can only be by hand in the depression that is entrapped in rolling disc of one piece one piece of many pieces of permanent magnets, consumption very consuming time is artificial, and depression and the essential size shape no-float of permanent magnets, and this point is difficult to accomplish.Because caved in, be greater than permanent magnets, rolling disc is when rotating, and permanent magnets is vibrated in depression, very fragile permanent magnets; Depression is flush fit permanent magnets, is difficult to again permanent magnets to be entrapped in the depression of rolling disc.
Summary of the invention
The purpose of this utility model is to provide the sensitive member that only obtains speed and acceleration signal with each permanent magnetism sheet on a Hall and rolling disc, a kind of multiple permanent magnetism sheets to be arranged to technique is simple, permanent magnetism sheet can not be shifted and sensing model is stable, a kind of in can induction region, can increase permanent magnetism sheet quantity as far as possible, utilize to greatest extent rolling disc displacement information, the sensitive member that output information is many.Use, on morpet, is measured moment, the morpet sensor sensitive member that motor operates steadily without elastic component and other machinery.
Design of the present utility model is: permanent magnetism sheet is seized on both sides by the arms to be fixed on rolling disc and to seize on both sides by the arms between magnetic sheet layer, and during turn disc, permanent magnetism sheet remains on the original position of rolling disc, can not move with respect to rolling disc, and sensing model is stable; In a Hall can receptive field, on a rolling disc, with identical multiple permanent magnetism sheets, carry out magnetic polarity variation, the signal that Hall is produced is square wave, controls with better function, more.For morpet, the quantity of information of expressing motion of foot state is more.
Structure of the present utility model is:
Many magnetic sheets well-distributed rotating disc type sensitive member, comprise a rolling disc 1 and many pieces of permanent magnetism sheets 2, the size of many pieces of permanent magnetism sheets 2 is identical, shape is identical, magnetic flow is identical, it is characterized in that: on rolling disc 1, be pasted with many pieces of permanent magnetism sheets 2, these many pieces of permanent magnetism sheets 2 equably rounded track distribute, and every piece of permanent magnetism sheet 2 is identical to the distance between identical, the adjacent two pieces of permanent magnetism sheets 2 of distance at circular rail trace 5 circle centers, place; In certain one side of rolling disc 1, the magnetic polarity of adjacent permanent magnet piece 2 is contrary, and the magnetic polarity distribution mode of the upper whole permanent magnetism sheets 2 of certain one side of rolling disc 1 is the N utmost point, the S utmost point, the N utmost point, the S utmost point, the N utmost point, the S utmost point
Seize magnetic sheet layer 6 on both sides by the arms having rolling disc 1 surface of permanent magnetism sheet 2 and permanent magnetism sheet 2 surfaces to be pasted with, permanent magnetism sheet 2 is seized on both sides by the arms to be fixed on rolling disc 1 and to seize on both sides by the arms between magnetic sheet layer 6;
Also comprise a Hall 3, Hall 3 is positioned at certain one side of rolling disc 1, and Hall 3 is located at the position that approaches permanent magnetism sheet 2 and can experience permanent magnetism sheet 2 magnetic flow, between Hall 3 and permanent magnetism sheet 2, has spacing; Hall 3 is the Halls that opposite magnetic polarities produced to square wave output signal.
Prior art is all that depression or hole are set on rolling disc, permanent magnets is entrapped in the depression or hole of rolling disc, this technique will be bored depression or hole on rolling disc, can only be by hand in the depression or hole that are entrapped in rolling disc of one piece one piece of many pieces of permanent magnets, consumption very consuming time is artificial, and depression or hole and the essential size shape no-float of permanent magnets, this point is difficult to accomplish.Because depression or hole are crossed and be greater than permanent magnets, during rolling disc, permanent magnets is vibrated in depression or hole, very fragile permanent magnets; Depression or hole are flush fit permanent magnets, are difficult to again permanent magnets to be entrapped in the depression or hole of rolling disc.For solving the problem of prior art, the utility model is arranged on permanent magnetism sheet 2 on rolling disc 1 by the method for pasting, and is mainly to greatly reduce permanent magnetism sheet 2 to be fixed on the technique on rolling disc 1.For preventing the solid problem that is pasted not strongly, the utility model is seized magnetic sheet layer 6 on both sides by the arms having rolling disc 1 surface of permanent magnetism sheet 2 and permanent magnetism sheet 2 surfaces to be pasted with, permanent magnetism sheet 2 is seized on both sides by the arms to be fixed on rolling disc 1 and to seize on both sides by the arms between magnetic sheet layer 6, the rotation of rolling disc 1 can not make permanent magnetism sheet 2 be shifted, guarantee that the relative position between many pieces of permanent magnetism sheets 2 is constant, the sensing capabilities of sensitive member is constant, and sensing model is stable.Paste one seize on both sides by the arms magnetic sheet layer 6 than prior art by hand more convenient in the depression that is entrapped in rolling disc 1 of one piece one piece of many pieces of permanent magnets or hole, simply, can not damage permanent magnet.
In a word, the utility model is being manufactured the process aspect of sensitive member, and the utility model, with seizing magnetic sheet layer 6 structure on both sides by the arms as technical guarantee, can be located at permanent magnetism sheet 2 on rolling disc 1 by the method for pasting, thus have advantages of make simple, conveniently reduce costs; Do not have prior art that when rolling disc 1 rotates, permanent magnetism sheet 2 collides with rolling disc 1 and damages the problem of permanent magnetism sheet 2, and visible the utility model has obvious technological advance than prior art.
Seize magnetic sheet layer 6 on both sides by the arms and select non-magnet_conductible material, or make with non-magnet_conductible material.
Multiple permanent magnetism sheets 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 magnetism sheets 2 on rolling disc, experience movement position and the speed of whole permanent magnetism sheets 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 magnetism sheet 2 output electrical signals with a continuous electric signal, because it is on rolling disc 1 that whole permanent magnetism sheet 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.
The magnetic polarity of adjacent permanent magnet piece 2 is very important technical characterictic on the contrary, all the magnetic polarity distribution mode of permanent magnetism sheet 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 Hall 3 export high and low alternate square-wave signal, 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 be 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 magnet piece 2, and the identical structure generation sinusoidal waveform of the magnetic polarity of adjacent permanent magnet piece 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 magnet piece 2 contrary structure, and rider people feels more comfortable.
The thickness of permanent magnetism sheet 2 is 0.2 ~ 0.5 millimeter.As long as selecting magnetic flow is 146---279 (BH) max/KJm
-3 permanent magnetism sheet 2, the thickness of permanent magnetism sheet 2 is 0.2 ~ 0.5 millimeter just can guarantee that Hall 3 can normally experience the magnetic field of permanent magnetism sheet 2, makes Hall 3 output electrical signals.Experiment showed, that the magnetic flow when permanent magnetism sheet 2 is 146---279 (BH) max/KJm
-3time, the thickness of permanent magnetism sheet 2 is 0.2 ~ 0.5 millimeter, Hall 3 can normally be experienced magnetic field the output electrical signals of permanent magnetism sheet 2.The thickness of selecting permanent magnetism sheet 2 is 0.2 ~ 0.5 millimeter, and object is the weight that alleviates permanent magnet, because alleviate the weight of permanent magnet, in the time of can making rolling disc 1, the inertia of permanent magnetism sheet 2 is little, and permanent magnetism sheet 2 can not be shifted, and sensing model is stable.
Seize a certain of the financial aluminium sheet of magnetic sheet layer 6 or sheet plastic on both sides by the arms.Finance aluminium sheet or sheet plastic and rolling disc 1 compress the use of permanent magnetism sheet 2.
Seizing magnetic sheet layer 6 on both sides by the arms is to have rolling disc 1 surface and the permanent magnetism sheet 2 surface casting lining cement liquid of permanent magnetism sheet 2, after this lining cement liquid solidifies, becoming solid layer.Be cast in rolling disc 1 surface and permanent magnetism sheet 2 surfaces with lining cement liquid, after solidifying, become fixing permanent magnetism sheet 2 techniques of seizing magnetic sheet layer 6 on both sides by the arms than simpler by the technique of financial aluminium sheet or the fixing permanent magnetism sheet 2 of sheet plastic, and fixing permanent magnetism sheet 2 the effect of shift position is also not better, sensing model is more stable.
Had alleviate permanent magnetism sheet 2 weight, compress and seize permanent magnetism sheet 2, lining cement liquid casting solidification on both sides by the arms and cement after the technology of permanent magnetism sheet 2, on rolling disc 1, paste many pieces of permanent magnetism sheets 2 just not have the problem that permanent magnetism sheet 2 be shifted when rolling disc 1 rotates, sensing model is stablized.Do not need by the prior art of complex process, permanent magnet to be entrapped in the depression or hole of rolling disc.
Advantage of the present utility model: simple in structure, cost is low, the permanent magnetism sheet quantity on permanent magnetism loop 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 total movement state, the output signal of energy perfect representation Moving plate can not drift about in distortion, for morpet, make power-assisted output can highly coordinate with power-assisted demand and cyclist is felt well.
［ 1 ］ technique of stickup permanent magnetism sheet is simple: the technique of pasting many pieces of permanent magnetism sheets on rolling disc is simple.Prior art is all that depression or hole are set on rolling disc, permanent magnets is entrapped in the depression or hole of rolling disc, this technique will be bored depression or hole on rolling disc, can only be by hand in the depression or hole that are entrapped in rolling disc of one piece one piece of many pieces of permanent magnets, consumption very consuming time is artificial, and depression or hole and the essential size shape no-float of permanent magnets, this point is difficult to accomplish.Because depression or hole are crossed and be greater than permanent magnets, during rolling disc, permanent magnets is vibrated in depression or hole, very fragile permanent magnets; Depression or hole are flush fit permanent magnets, are difficult to again permanent magnets to be entrapped in the depression or hole of rolling disc.
［ 2 ］ the permanent magnetism sheet of pasting can shift position: had alleviate permanent magnetism sheet weight, compress and seize permanent magnetism sheet, lining cement liquid casting solidification on both sides by the arms and cement after the technology of permanent magnetism sheet, on rolling disc, paste many pieces of permanent magnetism sheets and just do not have permanent magnetism sheet when turn disc, with respect to rolling disc, produce the problem of displacement, permanent magnetism sheet is synchronized with the movement with rolling disc all the time, and sensing model is stable.Do not need by the prior art of complex process, permanent magnet to be entrapped in the depression or hole of rolling disc.
Prior art embeds permanent magnets in rolling disc depression or hole, sticks on difference aspect hall sensing signal not obvious with the utility model at rolling disc.But manufacturing the process aspect of sensitive member, the utility model, with seizing magnetic lamellar structure on both sides by the arms as technical guarantee, can be located at permanent magnetism sheet on rolling disc by the method for pasting, thus have advantages of make simple, conveniently reduce costs; Can be when turn disc, permanent magnetism sheet and rolling disc collision and damage permanent magnetism sheet and there is durability advantage, visible the utility model has obvious technological advance than prior art.
［ 3 ］ simple in structure, without elastic component, machinery-free fault: experience multiple permanent magnetism sheets 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.
［ 4 ］ magnetic polarity is contrary, output square-wave signal, there is accurate control function,: because the magnetic polarity of adjacent two pieces of permanent magnetism sheets 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 two pieces of permanent magnetism sheets, even very close to each other between adjacent two pieces of permanent magnetism sheets, 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.
［ 5 ］ magnetic polarity of adjacent permanent magnet piece is contrary, permanent magnetism sheet 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 magnet piece 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, owing to being placed restrictions on the rolling disc diameter of pedal linkage, just can be on the rolling disc of prescribed level, increase permanent magnetism sheet quantity as far as possible, increase sensing point position as far as possible, use as far as possible many transducing signals to represent bicycle pedal movement position and speed, Precise Representation state of kinematic motion.
［ 6 ］ magnetic polarity of adjacent permanent magnet piece is contrary, can arrange that permanent magnetism sheet is many, sensing point position is many, the state of kinematic motion of rolling disc is represented accurately: to for morpet, the rolling disc size of fixing permanent magnetism sheet is strictly placed restrictions on, general rolling disc diameter can only be in 10-15 centimetre, in order to make Hall obtain the magnetic pole signal of permanent magnetism sheet under the condition that has spacing, the diameter of its permanent magnetism sheet 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 magnetism sheet ［ 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 magnet piece magnetic polarity, adjacent permanent magnet piece, by 5 centimetres of spacing,, on diameter 10-15 centimetre rolling disc, can only arrange at most 5-8 permanent magnetism sheet ［ 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 magnetism sheet 7-9 than prior art more; 73/8=9 ］, 30-65 permanent magnetism sheet ［ 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, when roughly 15 permanent magnetism sheets being set uniformly on rolling disc, substantially having eliminated prior art and has only established 5-8 permanent magnetism sheet and make that fast slow uncomfortable sensation of boosted vehicle; When roughly 20 permanent magnetism sheets 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.
［ 7 ］ there is no signal blind zone, power-assisted demand whenever all can obtain the power-assisted matching: this patent can arrange at most 35-73 permanent magnetism sheet at the rolling disc periphery of diameter 10-15 centimetre, and between each permanent magnetism sheet, 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 magnetism sheet just to have a signal in the position of leaving 10Du angle, summit, the exportable 4-7 of Hall control signal reaction power-assisted demand, can realize any position, have power-assisted just can obtain the excellent technique effect of corresponding power-assisted any time, make car and people's no-float, it is laborsaving comfortable again that cyclist feels.
［ 8 ］ only with a Hall, a control signal represents the total movement state of rolling disc, the state of kinematic motion of control signal and rolling disc is in full accord, control signal and people's demand is in full accord: multiple permanent magnetism sheets are fixed on rolling disc, permanent magnetism sheet is synchronizeed and is rotated with rolling disc, experience whole permanent magnetism sheet motor messages with a Hall, 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.
Accompanying drawing explanation
Fig. 1 is the sensitive member structural representation that is uniformly distributed multiple N-S on rolling disc and replaces permanent magnetism sheet;
Fig. 2 is the sensitive member structural representation that on rolling disc, high density is uniformly distributed multiple N-S and replaces permanent magnetism sheet;
Fig. 3 is cross-sectional view of the present utility model.
In figure, 1 is rolling disc, the 2nd, permanent magnetism sheet, the 3rd, and Hall, the 5th, circular rail trace, the 6th, seizes magnetic sheet layer on both sides by the arms.
The specific embodiment
As Fig. 1,3, in the plane with a face of 10.0 centimetres of rolling discs 1 of highstrenghtpiston's injection molded diameter, be pasted with 20 permanent magnetism sheets 2.Seize magnetic sheet layer 6 on both sides by the arms having rolling disc 1 surface of permanent magnetism sheet 2 and permanent magnetism sheet 2 surfaces to be also pasted with, permanent magnetism sheet 2 is seized on both sides by the arms to be fixed on rolling disc 1 and to seize on both sides by the arms between magnetic sheet layer 6.The thickness of permanent magnetism sheet 2 is 0.3 millimeter, and the magnetic flow of permanent magnetism sheet 2 is 146---279 (BH) max/KJm
-3in some values.
Seizing magnetic sheet layer 6 on both sides by the arms is to have rolling disc 1 surface and the permanent magnetism sheet 2 surface casting polyurethane lining cement liquid of permanent magnetism sheet 2, after solidifying, this polyurethane lining cement liquid becomes solid layer, this solid layer is exactly for when rolling disc 1 rotates, fix 20 permanent magnetism sheets 2 with respect to rolling disc 1 not shift position seize magnetic sheet layer 6 on both sides by the arms.
All permanent magnetism sheets 2 equably rounded track distribute, each permanent magnetism sheet 2 is fixed on 9.0 centimetres of circular rail traces 5 of diameter, the distance between each permanent magnetism sheet 2, adjacent permanent magnet piece 2 identical to the distance at circular rail trace 5 circle centers, places is identical.
All permanent magnetism sheets 2 equably rounded track distribute, each permanent magnetism sheet 2 is fixed on 9.0 centimetres of circular rail traces 5 of diameter, the distance between each permanent magnetism sheet 2, adjacent permanent magnet piece 2 identical to the distance at circular rail trace 5 circle centers, places is identical.
The contrary mode of magnetic polarity at 2 one-tenth adjacent permanent magnet pieces of whole permanent magnetism sheets 2 of a face setting of rolling disc is arranged, and on rolling disc face, all the magnetic polarity distribution mode of permanent magnetism sheets 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 ...
With a Hall 3, be located at rolling disc 1 and have the side of permanent magnetism sheet 2, Hall 3 is located at the position that approaches permanent magnetism sheet 2, be that Hall 3 is located in each permanent magnetism sheet 2 place circular rail trace 5 scopes, Hall 3 keeps the spacing distance of 0.3 centimetre with each permanent magnetism sheet 2 of rotary state, make the each permanent magnetism sheet 2 rotating when through Hall 3, Hall 3 can produce a corresponding square wave electric signal output.
As a face of the high strength aluminium rolling disc 1 of 10.0 centimetres of Fig. 2,3, diameters arranges 40 permanent magnetism sheets 2 of diameter 0.4-0.6 centimetre.The thickness of permanent magnetism sheet 2 is 0.2 millimeter, and the magnetic flow of permanent magnetism sheet 2 is 146---279 (BH) max/KJm
-3in some values, Hall 3 keeps the spacing distance of 0.2 centimetre with each permanent magnetism sheet 2 of rotary state, makes the each permanent magnetism sheet 2 rotating when through Hall 3, Hall 3 can produce a corresponding square wave electric signal output.The structure of other rolling disc 1, permanent magnetism sheet 2, Hall 3 is same as embodiment 1.
As Fig. 1,3, in the plane of a face of 10.0 centimetres of aluminium sheet rolling discs 1 of diameter, be pasted with 20 permanent magnetism sheets 2.Seize magnetic sheet layer 6 on both sides by the arms having rolling disc 1 surface of permanent magnetism sheet 2 and permanent magnetism sheet 2 surfaces to be also pasted with, permanent magnetism sheet 2 is seized on both sides by the arms to be fixed on rolling disc 1 and to seize on both sides by the arms between magnetic sheet layer 6.The thickness of permanent magnetism sheet 2 is 0.5 millimeter, and the magnetic flow of permanent magnetism sheet 2 is 146---279 (BH) max/KJm
-3in some values.Seize the aluminium sheet of magnetic sheet layer 6 use and rolling disc 1 formed objects and thickness on both sides by the arms.Other is same as embodiment 1.
Claims (7)
1. more than magnetic sheet well-distributed rotating disc type sensitive member, comprise a rolling disc (1) and many pieces of permanent magnetism sheets (2), the size of many pieces of permanent magnetism sheets (2) is identical, shape is identical, magnetic flow is identical, it is characterized in that: on rolling disc (1), be pasted with many pieces of permanent magnetism sheets (2), these many pieces of permanent magnetism sheets (2) equably rounded track distribute, and every piece of permanent magnetism sheet (2) is identical to the distance between identical, the adjacent two pieces of permanent magnetism sheets of distance (2) at circle center, circular rail trace (5) place; In certain one side of rolling disc (1), the magnetic polarity of adjacent permanent magnet piece (2) is contrary, and the magnetic polarity distribution mode of the upper whole permanent magnetism sheets (2) of certain one side of rolling disc (1) is the N utmost point, the S utmost point, the N utmost point, the S utmost point, the N utmost point, the S utmost point
Seize magnetic sheet layer (6) on both sides by the arms having rolling disc (1) surface of permanent magnetism sheet (2) and permanent magnetism sheet (2) surface to be pasted with, permanent magnetism sheet (2) quilt is seized on both sides by the arms to be fixed on rolling disc (1) and to seize on both sides by the arms between magnetic sheet layer (6);
Also comprise a Hall (3), Hall (3) is positioned at certain one side of rolling disc (1), and Hall (3) is located at the position that approaches permanent magnetism sheet (2) and can experience permanent magnetism sheet (2) magnetic flow, between Hall (3) and permanent magnetism sheet (2), has spacing; Hall (3) is the Hall that opposite magnetic polarities is produced to square wave output signal.
2. many magnetic sheets well-distributed rotating disc type sensitive member according to claim 1, is characterized in that: the thickness of permanent magnetism sheet (2) is 0.2 ~ 0.5 millimeter.
3. many magnetic sheets well-distributed rotating disc type sensitive member according to claim 2, is characterized in that: seize a certain of the financial aluminium sheet of magnetic sheet layer (6) or sheet plastic on both sides by the arms.
4. many magnetic sheets well-distributed rotating disc type sensitive member according to claim 2, it is characterized in that: seizing magnetic sheet layer (6) on both sides by the arms is at the rolling disc that has permanent magnetism sheet (2) (1) surface and permanent magnetism sheet (2) surface casting lining cement liquid, after this lining cement liquid solidifies, becomes solid layer.
5. according to the many magnetic sheets well-distributed rotating disc type sensitive member described in claim 1 or 2 or 3 or 4, it is characterized in that: Hall (3) is located at the just position of the circular rail trace (5) to many pieces of permanent magnetism sheets (2).
6. many magnetic sheets well-distributed rotating disc type sensitive member according to claim 5, is characterized in that: rolling disc (1) is provided with centre hole in the circle scope of circular rail trace (5) place of many pieces of permanent magnetism sheets (2).
7. many magnetic sheets well-distributed rotating disc type sensitive member according to claim 6, 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 |
|---|---|---|---|
| CN201320437966.2U CN203581298U (en) | 2012-07-28 | 2013-07-23 | Rotary disc type sensing element with even distribution of magnetic sheets |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102634591A CN102795294A (en) | 2012-07-28 | 2012-07-28 | Rotating disk type sensing element with uniform distribution of multiple magnetic blocks |
| CN201210263459.1 | 2012-07-28 | ||
| CN201320437966.2U CN203581298U (en) | 2012-07-28 | 2013-07-23 | Rotary disc type sensing element with even distribution of magnetic sheets |
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| Publication Number | Publication Date |
|---|---|
| CN203581298U true CN203581298U (en) | 2014-05-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012102634591A Pending CN102795294A (en) | 2012-07-28 | 2012-07-28 | Rotating disk type sensing element with uniform distribution of multiple magnetic blocks |
| CN201320437966.2U Withdrawn - After Issue CN203581298U (en) | 2012-07-28 | 2013-07-23 | Rotary disc type sensing element with even distribution of magnetic sheets |
| CN201310309349.9A Expired - Fee Related CN103381871B (en) | 2012-07-28 | 2013-07-23 | Many magnetic sheets well-distributed rotating disc type sensitive member |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012102634591A Pending CN102795294A (en) | 2012-07-28 | 2012-07-28 | Rotating disk type sensing element with uniform distribution of multiple magnetic blocks |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310309349.9A Expired - Fee Related CN103381871B (en) | 2012-07-28 | 2013-07-23 | Many magnetic sheets well-distributed rotating disc type sensitive member |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103381871A (en) * | 2012-07-28 | 2013-11-06 | 成都宽和科技有限责任公司 | Rotary disc type sensing element with evenly distributed multiple magnets |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103398810A (en) * | 2013-08-08 | 2013-11-20 | 上海电机学院 | Non-contact torque and power measuring device and method |
| CN103398811B (en) * | 2013-08-08 | 2015-07-08 | 上海电机学院 | Non-contact torque and power measuring device and method |
| CN108909924B (en) * | 2016-07-04 | 2019-12-24 | 永康市永泰工贸有限公司 | Electric scooter |
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| US3917997A (en) * | 1974-09-20 | 1975-11-04 | Illinois Tool Works | Magnetic flux closure member for an angular velocity sensing device |
| US3970935A (en) * | 1975-02-18 | 1976-07-20 | Burroughs Corporation | Wide-range digital reluctance tachometer |
| EP0484716B1 (en) * | 1990-11-09 | 1999-01-13 | Siemens Aktiengesellschaft | Electromagnetic sensor for determining the rotational speed and/or direction of a rotor |
| DE19534995A1 (en) * | 1995-09-21 | 1997-03-27 | Bosch Gmbh Robert | Steering wheel angle sensor |
| AUPO899797A0 (en) * | 1997-09-05 | 1997-10-02 | Southern Refrigeration Group Pty Ltd | An electric motor |
| US6124710A (en) * | 1998-11-13 | 2000-09-26 | Cts Corporation | Rotary magnetic encoder using hall effect for detecting revolution of a shaft |
| US6469499B2 (en) * | 2001-02-06 | 2002-10-22 | Delphi Technologies, Inc. | Apparatus and method for low power position sensing systems |
| BRPI0812593B8 (en) * | 2007-06-06 | 2023-01-10 | Hydro Aire Inc | ANGULAR POSITION SENSOR AND METHOD TO DETERMINE ANGULAR POSITION |
| CN201173933Y (en) * | 2008-04-09 | 2008-12-31 | 长沙矿山研究院 | Non-contact type revolution speed transducer |
| CN201955184U (en) * | 2010-12-03 | 2011-08-31 | 保定市玮尔光电科技有限公司 | Torque sensor for petroleum logging wireless transmission |
| CN202847951U (en) * | 2012-07-28 | 2013-04-03 | 成都宽和科技有限责任公司 | Rotating disc type sensing element with multi-magnetic block evenly distributed |
| CN102795294A (en) * | 2012-07-28 | 2012-11-28 | 成都宽和科技有限责任公司 | Rotating disk type sensing element with uniform distribution of multiple magnetic blocks |
-
2012
- 2012-07-28 CN CN2012102634591A patent/CN102795294A/en active Pending
-
2013
- 2013-07-23 CN CN201320437966.2U patent/CN203581298U/en not_active Withdrawn - After Issue
- 2013-07-23 CN CN201310309349.9A patent/CN103381871B/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103381871A (en) * | 2012-07-28 | 2013-11-06 | 成都宽和科技有限责任公司 | Rotary disc type sensing element with evenly distributed multiple magnets |
| CN103381871B (en) * | 2012-07-28 | 2015-09-30 | 成都宽和科技有限责任公司 | Many magnetic sheets well-distributed rotating disc type sensitive member |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103381871B (en) | 2015-09-30 |
| CN103381871A (en) | 2013-11-06 |
| CN102795294A (en) | 2012-11-28 |
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