CN1156247A - Phase comparative detector for pedal torque and rotational speed - Google Patents
Phase comparative detector for pedal torque and rotational speed Download PDFInfo
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- CN1156247A CN1156247A CN 96109834 CN96109834A CN1156247A CN 1156247 A CN1156247 A CN 1156247A CN 96109834 CN96109834 CN 96109834 CN 96109834 A CN96109834 A CN 96109834A CN 1156247 A CN1156247 A CN 1156247A
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- angle
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- torque
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Abstract
The present invention consists of a detecting sensor and a group of corner angular detecting rings installed on any group rotary components bearing or transfering the pedal torque. Said rotary components support separately on two ends of elastic body. Each detecting ring possesses of more than two angle mark members arranged with known space. Said device can detect torque and turning speed simultaneously by only one sensor system, thus the simple structure can be used to directly and accurately detect the torque and turning speed of the pedal.
Description
The invention belongs to the electromotive power assisted bicycle technical field, particularly the design of bicycle with intellectual electric driver pedal torque testing agency and rotary speed tester structure.
Electromotive power assisted bicycle is the lightweight vehicles of a kind of manpower driving and driven by power and usefulness, onrelevant between general electromotive power assisted bicycle manpower driving and the driven by power.And advanced bicycle with intellectual electric driver will at first be measured the torque (or claiming pedal moment) of bicyclist's pedal power and the size of rotating speed, and come the output power of regulating and controlling motor and the size of electric current as control signal with this torque value and tachometer value, not only alleviate the effect of manpower but also power saving to reach.The microcomputerized control technology is as extensively adopting in each technical field than proven technique at present, so the gordian technique of this intelligent control mode is how to measure the size of each moment pedal torque and the size of rotating speed, so that carry out Based Intelligent Control according to these two numerical value in good time.And the difficult point of measuring pedal torque is that when bicyclist's pedal application of force each parts that transmit this pedal torque are all among gyrating.If directly use various sensors to survey pedal powers, then these sensors also certainly will gyrate, and the lead-in wire that signal is spread out of from sensor also will be among the rotation winding that does not stop and become a unmanageable problem.Simultaneously, this torque detection system will keep stable, reliable and high duplication in the process of riding all the year round.For solving these special technique difficult points in the measurement of electromotive power assisted bicycle pedal torque, different testing agencies has appearred.
For example, (application number is a Chinese patent of the applicant's application: 9620018231), be to install eccentric stiffener on bicycle middle shaft additional.This eccentric stiffener is by the two-layer rolling bearing supporting with certain offset.The bicycle pedal axis rotates in the internal layer rolling bearing.Because off-centre is arranged, when the bicyclist applies pedal power, outer eccentric stiffener will overcome spring force and deflect.Because skin only deflects rather than is gyrating as internal layer, so easily this amount of deflection is converted to the variation of straight-line displacement.Measure this variable signal, can measure pedal torque.But adopt the bicycle of this scheme, wherein axle construction is much thick, complicated in the axial ratio ordinary bicycle.Simultaneously, rotating speed also needs to be detected separately by an other cover rotating speed detecting sensor system.
The example of another prior art also is that foot-operated torque measurement mechanism is placed on the bicycle middle shaft.On axis, arrange bar-shaped elastic body.When applying pedal power, elastic body deforms, and coaxial cam will make slide block overcome spring and axial displacement takes place.Because slide block is gyrating with axis, the end face of slide block need promote a fork that does not rotate with axis again.Measure the variation of fork straight-line displacement vertically, and with the signal of this signal as pedal torque.This structure is also very complicated, and rotating speed needs to be detected by the rotating speed detecting sensor system that is provided with separately in addition equally.
Another one example application number of the prior art is 95103616.5, is on hind axle, and elastic body shift fork and screw inclined plane cam are made on the dish of same garden.When applying pedal power, the spiral inclination wedge surface promotes one can be along the nylon sliding part of axial direction slip.There is a garden ring-type electric conductor the end of nylon spare in rotation, and in its disposed outside a motionless coil is arranged, and when axial straight-line displacement took place nylon spare, the inductance of coil changed.This axial displacement variable signal has promptly been represented the variation of pedal torque.But this kind structure is complicated too.Equally, this mechanism also must be provided with independent rotating speed detecting sensor system in addition.
In sum, a common ground of prior art is all to need to convert the pedal torque that bears on the revolving part to non-rotary linear displacement signal.And for finishing this conversion, structure is all very complicated, and another common ground is that independent rotating speed detecting sensor system all need be set in addition.This just makes structure more complicated.
The objective of the invention is to for overcoming the weak point of prior art, grind create the diverse electric power-assisted vehicle of a kind of principle with pedal torque and speed detector, this device can be served as the torque detection simultaneously by a unique sensing system, rotating speed detects, thereby available simple structure directly accurately detects pedal torque and rotating speed.
A kind of electric power-assisted vehicle of the present invention is ridden torque measuring device, comprise detecting sensor, it is characterized in that also comprising the one group of rotary part that is arranged in any one rotating shaft of bearing or transmitting pedal torque, this rotary part is bearing in elastomeric two ends respectively, invest one group of relative rotation detection ring on this rotary part respectively, there is the angle mark member that is the known spacings arrangement more than two in the same garden of said each detection ring on week, said detecting sensor is arranged on the not kinetoplast with respect to the position of angle mark member, sensor goes out dtc signal, and can detect rotating speed simultaneously.
The said sensor of the present invention can be a kind of of transmission-type or reflective photoelectric sensor, and said angle mark member is transmission area, echo area or the grating of certain angle a kind of then.
Adopt the principle of work of above-mentioned pedal torque measurement mechanism to be: after pedal was stressed, this group rotary part was also with torque suspension, and the elastic body that is bearing between the two halves of rotary part will deform.Because elastomeric distortion will relatively rotate between coaxial two parts rotary part.Be attached to two groups of angle mark members on the detection ring on this two halves respectively, for example transmission area also turns over an angle each other.When not stressing, the transmission area on the halves hides light tight mutually, because the angle that staggers, two transmission areas will be overlapped and printing opacity.Pedal power is big, and the two detection rings angle that staggers is big, and two transmission area laps are big more, and the printing opacity time is long more.But because the rotating speed speed is changing constantly, so the time of printing opacity is the size of authentic representative relative rotation not, also need and be separated by printing opacity time of transmission area of known angle of period profile compares, could really draw the accurate size of corner mutually, thereby accurately measure pedal torque.A principle of comparing that Here it is.And the printing opacity situation of the known angle of the period profile that usefulness has measured also can draw tachometer value simultaneously exactly by analytical cycle signal or known angle signal.During detection, can go out the integrated signal of two detection rings with a sensor, also available two sensors detect the signal of each detection ring respectively.Fig. 1 is under four kinds of situations, the signal graph that sensor receives.(A) integrated signal of one group of detection dish receiving with a sensor of expression, the value of pedal torque is by relative rotation signal t
1(i.e. the printing opacity time of an overlapping transmission region) and known angle signal T
1The ratio of (through the time between two adjacent overlapping transmission regions) is determined, and tachometer value can be by known angle signal T
1Directly determine.(B) in, the size of pedal torque is the same with (A), but the rotating speed difference.So t
2And T
2Numerical value and (A) in different, but t
2And T
2Ratio and t
1And T
1Ratio equate.(C) in, the figure of expression signal when pedal torque becomes big, t at this moment
3And T
3Ratio increase.(D) represent when detecting two relative rotation detection dishes respectively relative rotation signal t with two sensors
4Extraction method.And known angle signal both can use T
4, also can use T
4', among the figure up and down two signals be two sensors detected signals respectively.
The present invention proposes to utilize and rotate the principle of comparing in the position, directly measure the new solution of the relative rotation of the one group of rotary part that bears torque, take this directly to measure the pedal torque on the parts that rotating, and need not convert thereof into non-rotary displacement signal, also can measure the necessary speed revolution value of Based Intelligent Control simultaneously simultaneously.
The sensor of the invention described above also can be condenser type or inductance type or eddy current sensor, and said angle mark member then is a kind of of the plane in the certain angle zone that constitutes of medium or metal or one section angle grid line or angle tooth.Said sensor can also be Magnetic Sensor, said angle mark the member also plane in the certain angle zone that constitutes of magnetic material or one section angle grid line, angle tooth.
The present invention has following superiority:
The first, pedal torque is measured and tachometric survey, can be served as simultaneously by same sensing system, and entire measuring device is simplified generally greatly, and this is that prior art can not be accomplished.
The second, structure is very succinct, because the principle that adopts the position to compare, so the measuring accuracy height.Because parts are few, reliability, long-time stability also are improved.
Three, owing to do not need to convert pedal torque to axial straight-line displacement, so the axial arrangement size is little, the structure space that entire measuring device takies is also very little.
Four, assembling, adjustment are simply, conveniently.
Five, this measurement mechanism can be arranged on any one position of bearing or transmitting pedal torque, as axis wheel disc, hind axle etc. easily.
Description of drawings:
Fig. 1 is the signal graph that sensor receives among the present invention.
Fig. 2 is a kind of embodiment general structure synoptic diagram of the present invention.
Fig. 3 is the side view of Fig. 2.
Be described with reference to the accompanying drawings a kind of embodiment of the present invention.Fig. 2 is the general structure synoptic diagram of present embodiment.Among Fig. 2, bear pedal torque on the left and right sides two halves rotary part 1.Wherein half imports pedal torque, second half output.The two ends of equally distributed four springs 2 are bearing in respectively on the left and right two halves rotary part 11,12.Two relative rotation garden dishes 3 being made by steel disc are separately fixed on the two halves rotary part 11,12.Coil garden Zhou Kaiyou six groups of equidistant L in 3 upper edge in the relative rotation garden, become the printing opacity slotted eye 4 at ° angle, α=20, photoelectric sensor 5 is installed on the motionless Jiong shape support 6, makes photoelectric sensor 5 just aim at printing opacity slotted eye 4 at garden Zhou Fangxiang, as shown in Figure 3.When stressed, the slotted eye on the dish of two gardens will be in the position of mutual covering when no, and at this moment the photoelectric sensor no signal receives; When stressed, slotted eye lap 41 printing opacities on the dish of two gardens, at this moment photoelectric sensor receiving optical signals.Receive two signals between adjacent overlapping slotted eye (41,42) simultaneously, then can learn pedal torque value and tachometer value.
Present embodiment can be arranged separately on the axis of electric power-assisted vehicle, also can be separately or be integrated with electric wheel hub and be installed on the hind axle of car.
Claims (4)
1, a kind of electric power-assisted vehicle pedal torque measurement mechanism, comprise detecting sensor, it is characterized in that also comprising the one group of relative rotation detection ring that is arranged on any one group of rotary part that bears or transmit pedal torque, this rotary part is bearing in elastomeric two ends respectively, there is the angle mark member that is the known spacings arrangement more than two in the same garden of said each detection ring on week, said detecting sensor is arranged on the not kinetoplast with respect to the position of angle mark member, sensor goes out dtc signal, and can detect rotating speed simultaneously.
2,, it is characterized in that said sensor is a kind of of transmission-type or reflective photoelectric sensor, transmission area, echo area or the grating that said angle mark member is a certain angle a kind of as the said electric power-assisted vehicle pedal torque of claim 1 measurement mechanism.
3, as the said electric power-assisted vehicle pedal torque of claim 1 measurement mechanism, it is characterized in that said sensor is a kind of of condenser type, inductance type or eddy current sensor, said angle mark member is plane, angle grid line or the angle tooth in the certain angle zone of medium or metal formation.
4, as the said electric power-assisted vehicle pedal torque of claim 1 measurement mechanism, it is characterized in that said sensor is a Magnetic Sensor, said angle mark member is plane, angle grid line or the angle tooth in the certain angle zone of magnetic material formation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96109834 CN1059034C (en) | 1996-09-20 | 1996-09-20 | Phase comparative detector for pedal torque and rotational speed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96109834 CN1059034C (en) | 1996-09-20 | 1996-09-20 | Phase comparative detector for pedal torque and rotational speed |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1156247A true CN1156247A (en) | 1997-08-06 |
| CN1059034C CN1059034C (en) | 2000-11-29 |
Family
ID=5120648
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96109834 Expired - Fee Related CN1059034C (en) | 1996-09-20 | 1996-09-20 | Phase comparative detector for pedal torque and rotational speed |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1059034C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101495845B (en) * | 2006-05-04 | 2012-03-21 | 芙罗服务管理公司 | Torque indicator |
| CN102393268A (en) * | 2011-11-14 | 2012-03-28 | 南京航空航天大学 | Apparatus used for measuring ultra-high rotating speed impeller spindle torque |
| CN103091017A (en) * | 2011-11-07 | 2013-05-08 | 日本电产科宝株式会社 | Torque detection device and bicycle with the same |
-
1996
- 1996-09-20 CN CN 96109834 patent/CN1059034C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101495845B (en) * | 2006-05-04 | 2012-03-21 | 芙罗服务管理公司 | Torque indicator |
| US8490649B2 (en) | 2006-05-04 | 2013-07-23 | Flowserve Management Company | Torque indicator |
| CN103091017A (en) * | 2011-11-07 | 2013-05-08 | 日本电产科宝株式会社 | Torque detection device and bicycle with the same |
| CN102393268A (en) * | 2011-11-14 | 2012-03-28 | 南京航空航天大学 | Apparatus used for measuring ultra-high rotating speed impeller spindle torque |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1059034C (en) | 2000-11-29 |
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |