CN202783643U - Sensing element with uniformly distributed magnets in shell - Google Patents
Sensing element with uniformly distributed magnets in shell Download PDFInfo
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- CN202783643U CN202783643U CN 201220367974 CN201220367974U CN202783643U CN 202783643 U CN202783643 U CN 202783643U CN 201220367974 CN201220367974 CN 201220367974 CN 201220367974 U CN201220367974 U CN 201220367974U CN 202783643 U CN202783643 U CN 202783643U
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Abstract
The utility model relates to a sensing element with uniformly distributed magnets in a shell, belongs to the field of technology providing signals by magnetic induction, and particularly relates to technology of providing control signals by multi-spot magnetic induction on one rotating part. Permanent magnets and a hall element are disposed in a cavity formed by embedding a rotating disk and a fixed disk. A plurality of permanent magnets distributed in a circle are fixed on the rotating disk, and the adjacent ones of the permanent magnets are opposite in polarity, namely the polarities of the magnets are distributed in such manner: N pole, S pole, N pole and the like. The hall element on the fixed disk is close to the permanent magnets. The sensing element with uniformly distributed magnets in the shell has the advantages that the opposite polarity distribution manner of N and S for the adjacent permanent magnets enables the hall element to acquire square-wave signals and facilitates digital processing of the signals; and the permanent magnets and the hall element are relatively fixed so that signal output is reliable.
Description
Technical field
The utility model belongs to the technical field that magnetic induction provides signal, particularly relates on rotatable parts, carries out the technology that multi-point magnetic induction provides control signal.
Background technology
The Chinese patent 201020295192.0 " colluding pawl formula moment sensor " of Yebao Vehicle Material Industry's application discloses a kind of morpet sensing device, sensing device comprises that magnetic part and elastic component cooperate, and experience the sensing device of moment.After period of service was long, the elasticity modulus variation of elastic component will cause the control effect of transducing signal and controlled motor to change, and the power-assisted effect becomes and need to mismatch with people's power-assisted.And complicated with the project organization of elastic component, manufacturing cost is high.
The Chinese patent 01201843.0 " automatic detecting device of electric booster bicycle " of University of Science ﹠ Technology, Beijing's application discloses a kind of automatic detecting device of electric booster bicycle, the no touch detection is pedaled power, speed and is turned to, this device is established respectively magnetic sheet on the inside and outside wheel disc of relative motion, on the interior wheel disc spring is arranged, use spring reset between the inside and outside wheel disc, survey electric signal that the magnetic sheet of relative motion on the inside and outside wheel disc produces with two Halls on the support and represent to pedal power, speed and turn to.
Shortcoming (1) is not durable with elastic component: after period of service was long, the elasticity modulus variation of elastic component will cause the control effect of transducing signal and controlled motor to change, and the power-assisted effect becomes and need to mismatch with people's power-assisted, complex structure, and cost is high.
Shortcoming (2) sine wave output makes the magnetic sheet group Edge Distance can not be less than 4 centimetres, generally take 5 centimetres as good, can establish magnetic sheet group number very little and make, man-machine cooperation is undesirable: each magnetic sheet group is identical, then Hall output is that sinusoidal waveform is as control signal, as the control signal sinusoidal waveform certain peak valley difference must be arranged, because the magnetic sheet group of this patent needs certain-length to represent forward and reverse motion, be to establish at most 8 magnetic sheet groups on 20 centimetres the annular groove rolling disc circular trace at diameter, generally take 5 as good, Hall just can have the sine wave signal of control function.That is to say that this technical scheme of 01201843.0 patent is used for morpet, magnetic sheet group limited amount is ended in 8, control signal very little, man-machine cooperation is undesirable.If but more than 8 magnetic sheet groups, when people's treadmill was very fast, the signal graph of Hall output was close to a horizon, this signal is not controlled function, can not control electrical motor, when making it need power-assisted especially, loses assist function.
Shortcoming (3) signal blind zone reaches miter angle, really can not get power-assisted when needing power-assisted during startup: well-known, it is minimum in summit moment that the people steps on bicycle pedal, the zone that needs most power-assisted from leaving 10-45 degree angle, summit, but the angle between each magnetic sheet group of this patent is 45 degree, leaves summit 10-45 degree angular zone neither one magnetic sheet group at stretcher, also with regard to the neither one control signal, when consequently needing most power-assisted, but the motor of morpet really can not power-assisted.
In a word, except with the not durable again complex structure of elastic component, fit structure characteristics because of Hall and magnetic sheet group, the rotating disk size diameter is in 20 centimetres, and having placed restrictions on magnetic sheet group quantity is 8 groups, and magnetic sheet group number can not arbitrarily increase, make man-machine cooperation undesirable, and can not get power-assisted when starting, the power-assisted demand with provide power-assisted not mate, cyclist's traveling comfort is poor; As increasing by force magnetic sheet group quantity, its transducing signal loses again the Power assisted control function.
The Chinese patent 03264387.X " timing sensor of electric boosting bicycle " of Wang Naikang application discloses without elastic component, only with moving, fixed two rotating disks, inlay two permanent magnetic steels above the Moving plate, inlay three Hall elements above the price fixing, bicycle pedal circles, each Hall produces two pulses, and then three Hall elements produce six pulses.Divide folding can get three characteristics, four shortcomings are as follows:
Characteristics (1) are for obtaining six impulse singlas, can only be each permanent magnetic steel same pole in one side: each Hall will produce two pulses, then can only be the same face that the same pole of two permanent magnetic steels is located at Moving plate, namely in certain one side of Moving plate, two permanent-magnet magnetic steel capital be the arctic or all be the South Pole.If at the same face of Moving plate, a permanent magnetic steel is the arctic, another is the South Pole, and then pedal circles, and each Hall just can only produce a pulse, and three Halls just only have three pulses, and this does not just conform with this patent specification and has put down in writing.In order to increase pulse count, improve the control effect, can only be that each permanent magnetic steel same pole is in one side.
Characteristics (2) permanent magnetic steel is used for expression pedal fixed position, three Halls represent the pedal travel position: because pedal and Moving plate are synchronous rotations, so a permanent magnetic steel is fixed respectively in two positions on the Moving plate corresponding with two pedals, where some pedals turn, and then where corresponding permanent magnetic steel also turns; But only turn in the position that Hall is arranged, could send control signal by Hall, the motor of commander's morpet produces the power-assisted that needs and rotates.
The position of characteristics (3) middle different period pedal travels because Hall can not represent to circle, then just can not be only with a Hall: the different periods of pedal in circling, the power-assisted demand there is very big difference, embody the variation of this power-assisted demand, this patent is located at respectively 180 degree angles with three interior positions with three Halls, two permanent magnetic steels are located at respectively two pedal positions, pedal turns in the position that Hall is arranged, and this Hall represents that with regard to output signal pedal has arrived the position of this Huo Yuan.But there is again following shortcoming with a plurality of Halls.
These characteristics as the morpet sensor have three shortcomings:
Shortcoming (1) represents respectively the fixed position of two pedals with two permanent magnetic steels that do not have an otherness, the turned position that just can only represent with a plurality of Halls pedal: two permanent magnetic steels do not have otherness, advantage is can be regardless of the fixed position that represents respectively two pedals of left and right sides pin, make its left and right sides human hair combing waste give birth to the power-assisted demand, can produce identical motor power-assisted effect; But shortcoming is permanent magnetic steel itself just can not represent the turned position of pedal, and can only be located at the turned position that different angle positions represents pedal with a plurality of Halls, thus can not be only with a Hall, and must use a plurality of Halls.
Shortcoming (2) can not be only with a Hall, and three Halls must cause three control signals that original segmentation error is arranged, make the distortion of power-assisted demand model, naturally it is inconsistent with the power-assisted demand to produce power-assisted output: no matter morpet is one or two motor, the transducing signal of its control motor can only just can reach with a transducing signal input electric machine controller purpose of control motor; And this patent is with three Halls control motors, then must merge into one to three control signals of three Halls and could input electric machine controller after merging control signal.The parameter sensing of three Halls can not be the same, particularly owing to after variation of ambient temperature, the period of service length, the parameter sensing of three Halls may be widely different, when its result causes identical power-assisted demand, the output of different Halls be different voltages, cause motor to produce different power-assisted output, power-assisted output is inconsistent with the power-assisted demand; In like manner during identical power-assisted demand, the output of different Halls may be identical voltage again, cause motor to produce the output of same power-assisted, also produce power-assisted output and the inconsistent problem of power-assisted demand.
Shortcoming (3) merges control signal and easily produces signal drift, merging control signal and electric machine controller are not mated, power-assisted demand model distortion: because variation of ambient temperature, after period of service is long, the parameter sensing of three Halls may be widely different, three control signal point of connection of three Halls must change, then the merging control signal of identical power-assisted demand generation will produce the signal drift of segmenting, merge control signal as a whole signal distortion that produces, be the distortion of power-assisted demand model, any one that causes that electric machine controller selects three control signals all can produce power-assisted output and the inconsistent problem of power-assisted demand as benchmark.
Shortcoming (4) sensing site can not arbitrarily increase, the sensing site very little, the motor operation is just not steady, make people by bike feel very uncomfortable: owing to have shortcoming (1) and shortcoming (2) all to cause greater than one because of Hall quantity, clearly Hall quantity is measured more and more, and shortcoming (1) and shortcoming (2) performance are more serious.So the morpet that this patent provides can only be to make people by bike feel the morpet that traveling comfort is very bad.
Shortcoming (5) signal blind zone reaches 42 degree angles, really can not get power-assisted when needing power-assisted during startup: well-known, it is minimum in summit moment that the people steps on bicycle pedal, the zone that needs most power-assisted from leaving 10-45 degree angle, summit, but the angle between each Hall of this patent is the 42.5-43.5 degree, leaves summit 10-42 degree angular zone neither one Hall at stretcher, also with regard to the neither one control signal, when consequently needing most power-assisted, but the motor of morpet really can not power-assisted.
In a word, this patent is the technical scheme with a plurality of Hall control assistant modes, because can only represent with a plurality of Halls the turned position of pedal, a plurality of control signals of a plurality of Halls must have original error, it merges control signal and easily produces again signal drift, all can cause the distortion of power-assisted demand model, i.e. the identical power-assisted demand of different time, but obtain different power-assisted effects; Hall quantity is measured more and more, and the distortion of power-assisted demand model is more serious, the quantity of having placed restrictions on Hall, the Hall small number and to produce the motor operation just not steady, make people by bike feel very uncomfortable, and can not get power-assisted when starting.Make it want the power-assisted demand model undistorted, and want motor to operate steadily and always attend to one thing and lose sight of another on these two problems, can not get both.
Summary of the invention
The purpose of this utility model provides the sensitive member that only obtains speed and acceleration signal with each permanent magnets on a Hall and the annular groove rolling disc, but be a kind of in induction region, can increase permanent magnets quantity as far as possible, utilize to greatest extent annular groove rolling disc displacement information, output information is many, and Hall and a plurality of permanent magnets are with the fixing sensitive member of relative position of an assembly set.Use is measured moment, the morpet sensor sensitive member that motor operates steadily without elastic component and other machinery on morpet.
Design of the present utility model is: but in a Hall receptive field, carry out the alternately variation of south, northern polarity with identical a plurality of permanent magnets to the side of Hall on the annular groove rolling disc, the signal that Hall is produced is square wave, makes the control of signal with better function, more.For morpet, the quantity of information of expressing the motion of foot state is more.
Structure of the present utility model is:
Many magnetic patch well-distributed sensitive member in the housing, comprise an annular groove rolling disc 1, annular groove reaction plate 40, a Hall 3 and many pieces of permanent magnets 2, many pieces of permanent magnets 2 big or small identical, shape is identical, magnetic flow is identical, it is characterized in that: both concave surfaces of annular groove rolling disc 1 and annular groove reaction plate 40 are relative, annular groove reaction plate 40 is entrenched among the annular groove of annular groove rolling disc 1, become in relative rotation chimeric interior empty shell of two dishes, the concave surface of two dishes presss from both sides into a cavity ring 41; Annular groove rolling disc 1 in cavity ring 41 positions is fixedly installed many pieces of permanent magnets 2, these many pieces of permanent magnets 2 equably rounded track distribute, and namely every piece of permanent magnets 2 is identical to the distance between identical, the adjacent two pieces of permanent magnets 2 of distance at circle center, circular rail trace 5 places; The magnetic polarity of adjacent two pieces of permanent magnets 2 is opposite, and the magnetic polarity distribution mode of whole permanent magnets 2 is the N utmost point, the S utmost point, the N utmost point, the S utmost point, the N utmost point, the S utmost point on the annular groove rolling disc 1
Annular groove reaction plate 40 in cavity ring 41 is fixedly installed a Hall 3, and Hall 3 is located at the position that also can experience each permanent magnets 2 magnetic flow near permanent magnets 2, between Hall 3 and the permanent magnets 2 spacing is arranged; Hall 3 is the Halls that opposite magnetic polarities produced the square wave output signal.
Annular groove rolling disc 1 is namely chimeric with annular groove reaction plate 40, can relatively rotate again, guaranteed at annular groove rolling disc 1 rotary state, Hall 3 does not change with the sensed position of whole permanent magnets 2, make the output signal of Hall 3 only relevant with the rotation of whole permanent magnets 2, and irrelevant with annular groove rolling disc 1 and the object of annular groove reaction plate below 40; If annular groove rolling disc 1 is used metallic material with annular groove reaction plate 40, again shielding action can be arranged, so, place cavity ring 41 to respond to Hall 3 and whole permanent magnets 2 with annular groove rolling disc 1 and annular groove reaction plate 40, improved reliability, the authenticity of Hall 3 signals.
When annular groove reaction plate 40 is fixed on a certain object, when swivel becket connected in star rolling disc 1, Hall 3 on each permanent magnets 2 inswept annular groove reaction plates 40 on the annular groove rolling disc 1, each permanent magnets 2 can both make Hall 3 produce electric signal.Because the magnetic polarity of adjacent two pieces of permanent magnets 2 is opposite, namely all magnetic polarity south, the north of permanent magnets 2 replace in the face of Hall 3, then to produce electric signal be square-wave signal to Hall 3, square-wave signal is conveniently carried out the digitized processing signal, is used for the realization Digital Control.Prior art be the same magnetic polarity of the usefulness of whole permanent magnets 2 towards Hall 3, Hall 3 just can only produce sine wave signal, so can only be used for simulation control; Once the sensed parameter of Hall 3 changes, simulation control just may distortion.And the utility model is realized Digital Control with square-wave signal, can not produce the problem of control distortion.
Annular groove rolling disc 1 can be the on-deformable plate of material such as plastic flagstone, the exhausted plate of high strength, copper coin, aluminium sheet.When using sensitive member, annular groove rolling disc 1 will rotate, and the center of rotation is exactly that 2 one-tenth annular arrangement distributions of a plurality of permanent magnets are at the center of circle.
A plurality of permanent magnets 2 are in the annular arrangement scope, the purpose that becomes annular arrangement to distribute is only to experience with a Hall 3 state of kinematic motion of whole permanent magnets 2 on the annular groove rolling disc, namely experience movement position and the speed of whole permanent magnets 2 on the annular groove rolling disc, and the variation of speed, or title acceleration/accel, this Hall 3 just can be expressed the state of kinematic motion of permanent magnets 2 with a continuous electric signal, because it is on the annular groove rolling disc 1 that whole permanent magnets 2 is separately fixed at the annular groove rolling disc, then the continuous electric signal of Hall 3 generations just can be expressed the state of kinematic motion of annular groove rolling disc again.If this continuous electric signal is used for other object of control, this continuous electric signal is exactly control signal.If be used for the motor of control morpet, also need with micro controller system or other electron component as sensing signal processor, position in the control signal, speed, acceleration/accel are wanted rope to convert to need what power-assisted signal of power-assisted, the function that converts is exactly the power-assisted demand model, or claims the power-assisted model.
The magnetic polarity of adjacent permanent magnets 2 is very important technical characterictic on the contrary, all the magnetic polarity distribution mode of permanent magnets 2 is the N utmost point, the S utmost point, the N utmost point, the S utmost point, the N utmost point, the S utmost point ... make the high and low alternate square-wave signal of Hall 3 outputs, because the annular groove rolling disc that ends as limited size, rotating the accurate variable signal that will obtain in a week as much as possible, should be to select square wave certainly.The time that the peak-to-valley value of square-wave signal changes is short, can within the regular hour, produce the signal that the control meaning is arranged as much as possible.The structure generation square wave that the magnetic polarity of adjacent permanent magnets 2 is opposite, and the identical structure generation sinusoidal waveform of the magnetic polarity of adjacent permanent magnets 2, during especially for morpet, generally placing restrictions at diameter as the annular groove rolling disc of sensing element is 10-15 centimetre, to obtain the signal of control function in this limit scope, rotate a week, produce square wave than producing the available pulse number of sinusoidal waveform and many 7-9 doubly.Nature, the opposite structure of the magnetic polarity of adjacent permanent magnets 2 to the control effect of morpet more, the people cooperates with car better, the rider people feels more comfortable.
Be provided with bearing 42 between the inside face of the outside face of annular groove reaction plate 40 inner rings and annular groove rolling disc 1 inner ring.Bearing 42 makes between annular groove reaction plate 40 and the annular groove rolling disc 1 can keep good relatively rotating for a long time.
Annular groove rolling disc 1 is provided with centre hole 4 in the circle scope of circular rail trace 5 places of many pieces of permanent magnets 2.If annular groove rolling disc 1 will be set on the turning cylinder and use, will establish a hole that wears turning cylinder on the annular groove rolling disc 1; For guaranteeing that annular groove rolling disc 1 is when rotating with turning cylinder, Hall 3 can be experienced the motor message of each permanent magnets 2 on the annular groove rolling disc 1, then wear the center that the hole should be located at the circular rail trace 5 places circles scope of a plurality of permanent magnets 2 on the annular groove rolling disc 1, become centre hole 4.That is to say, centre hole 4 is not necessarily circular, can be the shapes such as square, triangle, in order to can be nested with the turning cylinder of the shapes such as square, triangle, but the interior sky of centre hole 4 necessarily comprises the center of circular rail trace 5 places circle, could use a Hall 3 to experience the motor message of whole permanent magnets 2 on the annular groove rolling disc 1 annular groove rolling disc.
Annular groove rolling disc 1 is plastic flagstone, aluminum board, copper material plate a certain of non-magnet_conductible material.Because the utility model is the opposite structure of magnetic polarity of adjacent permanent magnets 2, can make the edge of adjacent permanent magnets 2 almost can be affixed the electric signal that also can make Hall 3 outputs that the control function is arranged.
Advantage of the present utility model: simple in structure, cost is low, the permanent magnets quantity on the permanent magnets ring is not placed restrictions on, the impulse singla of outputting standard, do not have signal blind zone, only just total movement state, the output signal of energy perfect representation Moving plate can not drift about in distortion with one group of output signal of a Hall, be used for morpet, power-assisted output can be highly cooperated with the power-assisted demand and the cyclist is felt well.
(1) simple in structure, without elastic component, machinery-free fault: experience a plurality of permanent magnets with Hall and rotate output signal, the speed that provides with Chinese patent 01201843.0 can be calculated the principle of moment, available multiple math modeling is calculated the moment parameter of morpet, the motor that is used for the control morpet is realized power-assisted.Be lower than with elastic component and mechanically stressed sensor without elastic component, simple in structure, cost.After having avoided long-time use, each mechanical part distortion, machinery-free fault, the not good problem of cooperation.
(2) magnetic polarity is opposite, the output square-wave signal, has accurate control function: because the magnetic polarity of adjacent two pieces of permanent magnets is opposite, and Hall is selected the Hall that opposite magnetic polarities is produced the square wave output signal, then adjacent two pieces of permanent magnets no matter spacing what, even very close to each other between adjacent two pieces of permanent magnets, Hall can be exported square-wave signal too.As being used for morpet, the motor of controlling morpet with the output signal of square wave is better than using sinusoidal waveform, because the rectangle wave energy is accomplished at any time point of signal, the signal implication of expression movement position and speed is accurate, but thereby the movement position of Precise Representation booster bicycle pedal and speed, in order to go out the correct power-assisted demand of this state of kinematic motion with the accurate position of pedal and speed calculation.
(3) magnetic polarity of adjacent permanent magnets is opposite, permanent magnets quantity is not placed restrictions on, can increase the sensing point position: because magnetic polarity is opposite as far as possible, the output square-wave signal, even adjacent permanent magnets gapless, the signal of its output has remained number, differentiable square-wave signal, still has the control function, that is to say to export the unchanged linear signal of not controlling function.As being used for morpet, owing to placed restrictions on the annular groove rolling disc diameter of pedal linkage, just can be on the annular groove rolling disc of prescribed level, increase as far as possible permanent magnets quantity, as far as possible increase the sensing point position, represent bicycle pedal movement position and speed, the Precise Representation state of kinematic motion with as much as possible transducing signal.
(4) magnetic polarity of adjacent permanent magnets is opposite, it is many permanent magnets to be set, the sensing point position is many, state of kinematic motion to the annular groove rolling disc represents accurately: to being used for morpet, fixedly the annular groove rolling disc size of permanent magnets is strictly placed restrictions on, general annular groove rolling disc diameter can only be in 10-15 centimetre, in order to make Hall that the magnetic pole signal that obtains permanent magnets under the condition of spacing arranged, the diameter of its permanent magnets is at least Ф 0.6-0.8 centimetre, then peripheral zero-lash 35-73 permanent magnets ［ (10-1) the * 3.14/0.8=35 that arranges of diameter 10-15 centimetre annular groove rolling disc; (15-1) * 3.14/0.6=73 ］, namely stretcher circles, and Hall can obtain the motor that 35-73 signal is used for the control morpet.But if the identical prior art of adjacent permanent magnets magnetic polarity, adjacent permanent magnets then on diameter 10-15 centimetre of annular groove rolling disc, can only arrange at most 5-8 permanent magnets ［ (10-1) * 3.14/5.8=5 by 5 centimetres of spacings; (15-1) * 3.14/5.6=8 ］.As seen, the art of this patent can arrange doubly ［ 35/5=6 of permanent magnets 7-9 than prior art more; 73/8=9 ］, 30-65 permanent magnets ［ 35-5=30 is set more; 73-8=65 ］.So the annular groove rolling disc circles, the art of this patent has increased 7-9 annular groove turn disc site signal doubly than prior art.Electric machine control accuracy rate to morpet has improved 7-9 doubly naturally, make the cyclist also improve 7-9 doubly to power-assisted demand accuracy rate, car and people's cooperate degree improves greatly, and cyclist's comfort increases greatly, no longer is boosted vehicle the sort of one fast one slow uncomfortable sensation of prior art.The utility model is asked someone according to the experience of reality, when roughly 15 permanent magnets being set uniformly on the annular groove rolling disc, elimination prior art only establish 5-8 permanent magnets and make boosted vehicle the sort of one fast one slow uncomfortable sensation; When roughly 20 permanent magnets being set uniformly on the annular groove rolling disc, car cooperates oneself can satisfy human needs with the people's, and the sensation of riding boosted vehicle is very comfortable.
(5) do not have signal blind zone, the power-assisted that power-assisted demand whenever all can obtain to be complementary: this patent can arrange at most 35-73 permanent magnets at diameter 10-15 centimetre annular groove rolling disc periphery, and average angle is the 5-10 degree between each permanent magnets.Be used for morpet, when starting or move, stretcher is in the 35 degree zones of leaving 10-45 degree angle, summit, 4-7 permanent magnets (signal just having been arranged in the position of leaving 10 degree angles, summit) arranged, then the exportable 4-7 of Hall control signal reacts the power-assisted demand, can realize any position, have power-assisted just can obtain the excellent technique effect of corresponding power-assisted any time, make car and people's no-float, it is laborsaving comfortable again that the cyclist feels.
(6) only with a Hall, the total movement state of a control signal representative ring connected in star rolling disc, the state of kinematic motion of control signal and annular groove rolling disc is in full accord, control signal and people's demand is in full accord: a plurality of permanent magnets are fixed on the annular groove rolling disc, permanent magnets and annular groove rolling disc rotate synchronously, with a whole permanent magnets motor message of Hall impression, then the state of kinematic motion of the control signal of Hall output and annular groove rolling disc is in full accord, just in full accord with people's demand, control signal does not have original segmentation error and signal drift problem yet.Even the hall sensing parameter changes, also be whole control signal parallel, as long as 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 that has changed becomes systematicness to change.As being used for morpet, the power-assisted demand model can distortion, and power-assisted output and power-assisted demand still keep the matching relationship of original model, and the systematicness that the cyclist is easy to grasp this power-assisted ability changes.
(7) use the in relative rotation synthetic housing of annular groove rolling disc annular groove reaction plate, fixed the relative position of Hall with whole permanent magnets, avoid the outer ambient interference of housing, improved reliability, the authenticity of hall signal, also made things convenient for installation, debugging, maintenance etc.
Description of drawings
Fig. 1 is the sensitive member structural representation that even a plurality of N-S of distribution replace permanent magnets on the rolling disc;
Fig. 2 is the sensitive member structural representation that the even a plurality of N-S of distribution of high density replace permanent magnets on the rolling disc;
Fig. 3 is the cross-sectional view of sensor.
1 is annular groove rolling disc, the 2nd among the figure, permanent magnets, the 3rd, Hall, the 5th, circular rail trace, the 40th, annular groove reaction plate, the 41st, cavity ring, the 42nd, bearing.
The specific embodiment
Many magnetic patch well-distributed sensitive member in embodiment 1, the housing
Such as Fig. 1,3, relative with both concave surfaces of an annular groove rolling disc 1 and an annular groove reaction plate 40, the size of annular groove rolling disc 1 and annular groove reaction plate 40 just in time makes annular groove reaction plate 40 can be entrenched among the annular groove of annular groove rolling disc 1, synthetic two dishes are chimeric interior empty shell in relative rotation, and the concave surface of two dishes presss from both sides into a cavity ring 41; Annular groove rolling disc 1 in cavity ring 41 positions is fixedly installed 20 permanent magnets 2.Annular groove rolling disc 1 and annular groove reaction plate 40 highstrenghtpiston's injection molded.
10.0 centimetres of 1 diameters of annular groove rolling disc in the cavity ring 41, the diameter of establishing 2,20 permanent magnets 2 of 20 permanent magnets at annular groove rolling disc 1 are respectively 0.8 centimetre, and magnetic flow is 146---279 (BH) max/KJm
-3In some values.The structure of annular groove rolling disc 1, permanent magnets 2, Hall 3 is as follows:
All equably rounded track distributions of permanent magnets 2, each permanent magnets 2 is fixed on 9.0 centimetres of circular rail traces 5 of diameter, and namely each permanent magnets 2 is identical to the distance between identical, the adjacent permanent magnets 2 of distance at circle center, circular rail trace 5 places.
The opposite mode of magnetic polarity in 2 one-tenth adjacent permanent magnets 2 of whole permanent magnets of 1 one face settings of rolling disc is arranged, namely on 1 one faces of rolling disc all the magnetic polarity distribution mode of permanent magnets 2 be the N utmost point, the S utmost point, the N utmost point, the S utmost point, the N utmost point, the S utmost point ...
Annular groove reaction plate 40 in cavity ring 41 is fixedly installed a Hall 3, the output line of Hall 3 passes from annular groove reaction plate 40, Hall 3 is located at the position near permanent magnets 2, be that Hall 3 is located in each permanent magnets 2 place circular rail trace 5 scope, Hall 3 keeps 0.3 centimetre spacing distance with each permanent magnets 2 of rotary state, make each permanent magnets 2 of rotation through Hall 3 time, Hall 3 can produce the square wave electric signal output of a correspondence.
Many magnetic patch well-distributed sensitive member in embodiment 2, the high density housing
Such as Fig. 2,3,10.0 centimetres of 1 diameters of annular groove rolling disc in the cavity ring 41, the diameter of establishing 2,40 permanent magnets 2 of 40 permanent magnets at annular groove rolling disc 1 are respectively 0.6 centimetre, and magnetic flow is 146---279 (BH) max/KJm
-3In some values.Hall 3 keeps 0.2 centimetre spacing distance with each permanent magnets 2 of rotary state, makes each permanent magnets 2 of rotation through Hall 3 time, and Hall 3 can produce the square wave electric signal output of a correspondence.The structure of other rolling disc 1, permanent magnets 2, Hall 3 is same as embodiment 1.
Claims (5)
1. many magnetic patch well-distributed sensitive member in the housing, comprise an annular groove rolling disc (1), annular groove reaction plate (40), a Hall (3) and many pieces of permanent magnets (2), many pieces of permanent magnets (2) big or small identical, shape is identical, magnetic flow is identical, it is characterized in that: annular groove rolling disc (1) is relative with both concave surfaces of annular groove reaction plate (40), annular groove reaction plate (40) is entrenched among the annular groove of annular groove rolling disc (1), become in relative rotation chimeric interior empty shell of two dishes, the concave surface of two dishes presss from both sides into a cavity ring (41); Annular groove rolling disc (1) in cavity ring (41) position is fixedly installed many pieces of permanent magnets (2), these many pieces of permanent magnets (2) equably rounded track distribute, and namely every piece of permanent magnets (2) is identical to the distance between identical, the adjacent two pieces of permanent magnets of distance (2) at circle center, circular rail trace (5) place; The N utmost point of every piece of permanent magnets (2) magnetic polarity and the S utmost point are respectively on the two sides of annular groove rolling disc (1), the magnetic polarity of adjacent two pieces of permanent magnets (2) is opposite, and the magnetic polarity distribution mode of the upper whole permanent magnets (2) of an annular groove rolling disc (1) is the N utmost point, the S utmost point, the N utmost point, the S utmost point, the N utmost point, the S utmost point
Annular groove reaction plate (40) in cavity ring (41) is fixedly installed a Hall (3), Hall (3) is located at the position that also can experience each permanent magnets (2) magnetic flow near permanent magnets (2), between Hall (3) and the permanent magnets (2) spacing is arranged; Hall (3) is the Hall that opposite magnetic polarities is produced the square wave output signal.
2. many magnetic patch well-distributed sensitive member in the housing according to claim 1 is characterized in that: be provided with bearing (42) between the inside face of the outside face of annular groove reaction plate (40) inner ring and annular groove rolling disc (1) inner ring.
3. many magnetic patch well-distributed sensitive member in the housing according to claim 2, it is characterized in that: Hall (3) is located at over against the position of the circular rail trace (5) of many pieces of permanent magnets (2).
4. many magnetic patch well-distributed sensitive member in the housing according to claim 3, it is characterized in that: annular groove rolling disc (1) is provided with centre hole (4) in the circle scope of circular rail trace (5) place of many pieces of permanent magnets (2).
5. many magnetic patch well-distributed sensitive member in the housing according to claim 3 is characterized in that: annular groove 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 |
|---|---|---|---|
| CN 201220367974 CN202783643U (en) | 2012-07-28 | 2012-07-28 | Sensing element with uniformly distributed magnets in shell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220367974 CN202783643U (en) | 2012-07-28 | 2012-07-28 | Sensing element with uniformly distributed magnets in shell |
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| Publication Number | Publication Date |
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| CN202783643U true CN202783643U (en) | 2013-03-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220367974 Expired - Fee Related CN202783643U (en) | 2012-07-28 | 2012-07-28 | Sensing element with uniformly distributed magnets in shell |
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| Country | Link |
|---|---|
| CN (1) | CN202783643U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102785749A (en) * | 2012-07-28 | 2012-11-21 | 成都宽和科技有限责任公司 | Sensing element with plurality of magnet blocks uniformly distributed in housing |
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2012
- 2012-07-28 CN CN 201220367974 patent/CN202783643U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102785749A (en) * | 2012-07-28 | 2012-11-21 | 成都宽和科技有限责任公司 | Sensing element with plurality of magnet blocks uniformly distributed in housing |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130313 Termination date: 20170728 |