CN108680294A - A kind of electric bridge detection expansion of metal torque sensor - Google Patents
A kind of electric bridge detection expansion of metal torque sensor Download PDFInfo
- Publication number
- CN108680294A CN108680294A CN201810410171.XA CN201810410171A CN108680294A CN 108680294 A CN108680294 A CN 108680294A CN 201810410171 A CN201810410171 A CN 201810410171A CN 108680294 A CN108680294 A CN 108680294A
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- Prior art keywords
- axle sleeve
- coil
- main shaft
- plastic stent
- torque sensor
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- 239000002184 metal Substances 0.000 title claims abstract description 21
- 238000001514 detection method Methods 0.000 title abstract description 11
- 229920003023 plastic Polymers 0.000 claims abstract description 41
- 239000004033 plastic Substances 0.000 claims abstract description 41
- 230000005405 multipole Effects 0.000 claims description 7
- 238000012545 processing Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 208000002193 Pain Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000012549 training Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
- G01L3/16—Rotary-absorption dynamometers, e.g. of brake type
- G01L3/22—Rotary-absorption dynamometers, e.g. of brake type electrically or magnetically actuated
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/22—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring the force applied to control members, e.g. control members of vehicles, triggers
- G01L5/225—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring the force applied to control members, e.g. control members of vehicles, triggers to foot actuated controls, e.g. brake pedals
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
- Power Steering Mechanism (AREA)
Abstract
The invention discloses a kind of electric bridges to detect expansion of metal torque sensor, including mounting bracket (1), it is characterised in that：Plastic stent (2) is equipped in mounting bracket (1), plastic stent (2) is equipped with axle sleeve (3), main shaft (4) is equipped in axle sleeve (3), main shaft (4) is that spline couples with axle sleeve (3), external splines (5) is equipped in axle sleeve (3), main shaft (4) is equipped with internal spline (6), main shaft (4) rotation, which is matched by internal spline (6) with external splines (5), drives axle sleeve (3) to rotate, coil (8) is equipped in plastic stent (2), coil one (9) and coil two (10) are equipped in coil (8), pcb board (11) is equipped in plastic stent (2), pcb board (11) is equipped with filter amplifier (12), Hall element (13), microcontroller (14), the advantages of the present invention over the prior art are that：Precision is high while electric bridge detection expansion of metal torque sensor is at low cost.
Description
Technical field
The present invention relates to torque sensor technical fields, in particular to a kind of electric bridge to detect expansion of metal torque sensor.
Background technology
Torque sensor is the technology of Moped Scooter field forefront, it is that the understanding of bicycle electric force aid system is ridden
The core that person is intended to, high-end electric booster bicycle use at present the double-side torque sensor of most scientific and technological content, this biography
Sensor technology is monopolized by German BOSCH and YAMAHA Deng Jijia trans-corporations of Japan for a long time, and the vehicle for carrying this sensor is sold
Valence is generally at 2000 Euros or more, this is also the big reason that electric booster bicycle can not open up markets in China, with technology
The high praise of development, especially Japan and the American-European Personal Transporter for this form of bicycle, the final quilt of torque sensor
It has been applied on bicycle.
By taking bicycle as an example, torque sensor is mainly installed between crank and chain wheel, that is, five logical outsides, is had
It is a little then be directly installed on axis, not absolute rigid body in the world, therefore axis just will produce in stress it is extremely subtle
Deformation under torsion, the subtle deformation signal by measuring axis surface can obtain the size for the torque currently trampled, but torque
Sensor still has several drawbacks, one side torque sensor has a high cost, another aspect torque sensor axis by
Error signal is will produce when to transverse pressure, the accuracy of torque sensor is caused to be affected, therefore, for torque sensor
Deficiency be improved with defect.
Invention content
The technical problem to be solved by the present invention is to overcome the above technological deficiency, provide that a kind of cost is relatively low, power with high accuracy
Square sensor.
In order to solve the above technical problems, technical solution provided by the invention is：A kind of electric bridge detection expansion of metal torque biography
Sensor, including mounting bracket, mounting bracket is interior to be equipped with plastic stent, and plastic stent is equipped with axle sleeve, and axle sleeve is with plastic stent
It is rotatablely connected and junction is equipped with bearing, main shaft is equipped in axle sleeve, main shaft is rotation connection and junction with plastic stent
Equipped with bearing, main shaft is that spline couples with axle sleeve, external splines is equipped in axle sleeve, main shaft is equipped with internal spline, and main axis passes through
Internal spline is matched with external splines drives axle sleeve rotation, is set as occlusal area on axle sleeve with external splines corresponding region, in plastic stent
Equipped with coil, it is equipped with coil one and coil two in coil, coil position is corresponding with occlusal area, coil and occlusal area when coil is powered
Coupling, is equipped with pcb board in plastic stent, and pcb board is equipped with filter amplifier, Hall element, microcontroller, on main shaft with Hall member
Part corresponding position is equipped with multi-pole magnet-ring, and mounting bracket is equipped with power supply, power supply power supply to pcb board, and main shaft drives multi-pole magnet-ring
Hall element conveys voltage signal to microcontroller when rotation, and outbound course signal after single-chip data processing is engaged on axle sleeve
When Qu Wei is deformed upon, coil one and two balance of voltage of coil, when occlusal area deforms upon on axle sleeve, coil one and coil two
Generate voltage differential signal, voltage differential signal is delivered to microcontroller by filter amplifier, microcontroller receiving voltage difference signal and with
Calibration data compares, output torque signal.
The advantages of the present invention over the prior art are that：It includes plastics branch that electric bridge, which detects expansion of metal torque sensor,
Frame, coil, axle sleeve, main shaft, pcb board etc., by Coil Detector torque, since coil is complete by 360 degree of main shaft and axle sleeve occlusal area
Full circle is in it, so angle is not present when mounting torque, and the concentricity to bearings at both ends and fit-up gap, without very high
It is required that production efficiency can be effectively improved, the simple combination of axle sleeve and main shaft, plastic stent greatly saves torque space and adds
Work difficulty, overall volume is small, light-weight, effectively reduces cost, Hall element on pcb board, filter amplifier, microcontroller it is mutual
Cooperation, promotes whole stability and reliability, and axle sleeve position can arbitrarily adjust, can be with to ensure that both sides pedal force is consistent
Remote one end main shaft overstriking will be covered off axis, come reduce main shaft because caused by long torsion be lost.
As an improvement, the internal spline is helical teeth structure with external splines, helical teeth forms turbulent structure, inverse swirl direction
Apply torsion expansion of metal to become larger, applying torsion expansion of metal along swirl direction becomes smaller, and it is positive and negative that such structure makes it have resolution
The function of torsion.
As an improvement, the axle sleeve is located at plastic stent one end, main shaft and plastics branch with plastic stent junction bearing
Frame junction bearing is located at the plastic stent other end, and occlusal area is located in the middle part of plastic stent, and bearing has positioning action, Ci Zhongshe
Meter allows bearing to avoid the occlusal area of Coil Detector, and when between main shaft and axle sleeve by both ends cross force, the stop bit of axle sleeve is swollen
It is swollen to be arrived by Coil Detector, it avoids as knurling, or patch line cause because that can be detected expansion by torque when cross force
Torque meeting output error signal, ensure that the precision of torque sensor.
The microcontroller is 51 microcontrollers, and the simple easy programming of 51 microcontrollers, cost is relatively low, and program reduces while stabilization
Production cost.
Description of the drawings
Fig. 1 is a kind of structural schematic diagram of electric bridge detection expansion of metal torque sensor of the present invention.
Fig. 2 is a kind of structural schematic diagram of electric bridge detection expansion of metal torque sensor bottom bracket axle of the present invention.
Fig. 3 is the structural schematic diagram of main shaft in a kind of electric bridge detection expansion of metal torque sensor of the present invention.
Fig. 4 is the connection diagram of circuit part in a kind of electric bridge detection expansion of metal torque sensor of the present invention.
As shown in the figure：1, mounting bracket, 2, plastic stent, 3, axle sleeve, 4, main shaft, 5, external splines, 6, internal spline, 7, occlusion
Area, 8, coil, 9, coil one, 10, coil two, 11, pcb board, 12, filter amplifier, 13, Hall element, 14, microcontroller, 15,
Multi-pole magnet-ring, 16, power supply.
Specific implementation mode
Present invention will be described in further detail below with reference to the accompanying drawings.
A kind of electric bridge detection expansion of metal torque sensor, including mounting bracket 1, mounting bracket 1 is interior to be equipped with plastic stent
2, plastic stent 2 is equipped with axle sleeve 3, and axle sleeve 3 is rotation connection with plastic stent 2 and junction is equipped with bearing, is set in axle sleeve 3
There is main shaft 4, main shaft 4 is rotation connection with plastic stent 2 and junction is equipped with bearing, and main shaft 4 is that spline couples with axle sleeve 3,
External splines 5 is equipped in axle sleeve 3, main shaft 4 is equipped with internal spline 6, and the rotation of main shaft 4 matches drive by internal spline 6 with external splines 5
Axle sleeve 3 rotates, and is set as occlusal area 7 on axle sleeve 3 with 5 corresponding region of external splines, coil 8 is equipped in plastic stent 2, is set in coil 8
There are coil 1 and coil 2 10,8 position of coil is corresponding with occlusal area 7, and coil 8 is coupled with occlusal area 7 when coil 8 is powered, plastics
Be equipped with pcb board 11 in holder 2, pcb board 11 is equipped with filter amplifier 12, Hall element 13, microcontroller 14, on main shaft 4 with suddenly
Your 13 corresponding position of element is equipped with multi-pole magnet-ring 15, and mounting bracket 1 is equipped with power supply, and power supply 16 supplies power to pcb board 11, main shaft
Hall element 13 conveys voltage signal to microcontroller 14 when 4 drive multi-pole magnet-rings 15 rotate, and is exported after 14 data processing of microcontroller
Direction signal, when occlusal area 7 does not deform upon on axle sleeve 3, coil 1 and 2 10 balance of voltage of coil are engaged on axle sleeve 3
When area 7 deforms upon, coil 1 generates voltage differential signal with coil 2 10, and voltage differential signal is conveyed by filter amplifier 12
It is compared to microcontroller 14,14 receiving voltage difference signal of microcontroller and with calibration data, output torque signal.
The internal spline 6 and external splines 5 are helical teeth structure.
The axle sleeve 3 is located at 2 one end of plastic stent with 2 junction bearing of plastic stent, and main shaft 4 connects with plastic stent 2
It connects place's bearing and is located at 2 other end of plastic stent, occlusal area 7 is located at 2 middle part of plastic stent.
The microcontroller 14 is 51 microcontrollers.
Present invention is mainly used for moment inspectings, are suitable for electric assisted bicycle torque and torque measurement, mechanical arm torsion
Sensing, the detection of automatic gearbox of vehicles torque, training gear of vehicle force aid system etc., when specifically used, with it is electric boosted voluntarily
For vehicle, what main shaft both ends were installed respectively is crank and pedal, and the pedal force from both sides passes through stinging between main shaft and axle sleeve
Position is closed to conduct to the axle sleeve other end, by the chain wheel mounted on the axle sleeve other end by pedal force output driving bicycle walking,
In two coils and pcb board be all mounted on a cylindrical plastic holder, plastic stent outer diameter and mounting bracket internal diameter phase
Together, in the position of installation PCB, the plane inlayed in one is done, ensures the steady and space of PCB and electronic component, directional velocity
Signal acquisition is mainly realized by the multistage magnet ring being fixed on main shaft with the hall device on PCB, Ke Yili
With hall signal to determine whether straight-tooth or helical teeth can be selected in output torque signal, spline, straight-tooth easily adds with simple in structure
Work the advantages of without direction of rotation property, but easy tos produce crash amount gap, and expansion of metal deformation quantity is small, and helical teeth has metal swollen
Bulging variable is big, the advantages of being not likely to produce crash amount gap, can also identify positive and negative torsion, but processes relative complex, has rotation
Turn directionality.
That two coils are supplied to by the PWM waveform that microcontroller is sent out in terms of circuit, axle sleeve do not start to expansion or
Before diminution, signal amplifying part branch thinks two coil working states, adjustment it is almost the same, so that its stable output signal is existed
The state of monolithic function identification, at this time microcontroller set this point to zero, zero-point voltage could be provided as some arbitrary electricity
Be pressed in single supply in this way when power supply, zero-point voltage should high and 0V, when being powered using positive-negative power, reset can be equal to
0V or it is less than 0V, has in this way convenient for identifying positive and negative torsion, when the axle sleeve in two coils by torsion due to being expanded or contracting
Hour, the magnetic field in two coils is changed, the balance coupling of two coils will break, and filter amplifier puts the signal of change
Big output causes microcontroller amplifier magnification ratio that can be set by the metal coefficient of expansion, it is ensured that the signal of detection is in a linear relationship to be
Standard, microcontroller compare the signal detected and calibration data, obtain practical accurately torque signals and output torque signal.
The present invention and its embodiments have been described above, this description is no restricted, shown in attached drawing
Only one of embodiments of the present invention, actual structure is not limited to this.All in all if the ordinary skill of this field
Personnel are enlightened by it, without departing from the spirit of the invention, are not inventively designed and the technical solution phase
As frame mode and embodiment, be within the scope of protection of the invention.
Claims (4)
1. a kind of electric bridge detects expansion of metal torque sensor, including mounting bracket (1), it is characterised in that：In mounting bracket (1)
Equipped with plastic stent (2), plastic stent (2) is equipped with axle sleeve (3), and axle sleeve (3) is to be rotatablely connected and connect with plastic stent (2)
It meets place and is equipped with bearing, main shaft (4) is equipped in axle sleeve (3), main shaft (4) is rotation connection with plastic stent (2) and junction is set
It is that spline couples with axle sleeve (3) to have bearing, main shaft (4), external splines (5) is equipped in axle sleeve (3), main shaft (4) is equipped with internal spline
(6), main shaft (4) rotation matches drive axle sleeve (3) rotation with external splines (5) by internal spline (6), on axle sleeve (3) with outer flower
Key (5) corresponding region is set as occlusal area (7), and coil (8) is equipped in plastic stent (2), be equipped in coil (8) coil one (9) with
Coil two (10), coil (8) position is corresponding with occlusal area (7), and coil (8) is coupled with occlusal area (7) when coil (8) is powered, and moulds
Expect to be equipped with pcb board (11) in holder (2), pcb board (11) is equipped with filter amplifier (12), Hall element (13), microcontroller
(14), multi-pole magnet-ring (15) is equipped on main shaft (4) with Hall element (13) corresponding position, mounting bracket (1) is equipped with power supply,
Power supply (16) supplies power to pcb board (11), and Hall element (13) is to microcontroller (14) when main shaft (4) drives multi-pole magnet-ring (15) to rotate
Voltage signal is conveyed, outbound course signal after microcontroller (14) data processing, occlusal area (7) does not deform upon on axle sleeve (3)
When, coil one (9) and coil two (10) balance of voltage, when occlusal area (7) deforms upon on axle sleeve (3), coil one (9) and line
It encloses two (10) and generates voltage differential signal, voltage differential signal is delivered to microcontroller (14), microcontroller by filter amplifier (12)
(14) receiving voltage difference signal and with calibration data compare, output torque signal.
2. a kind of electric bridge according to claim 1 detects expansion of metal torque sensor, it is characterised in that：The interior flower
Key (6) and external splines (5) are helical teeth structure.
3. a kind of electric bridge according to claim 1 detects expansion of metal torque sensor, it is characterised in that：The axle sleeve
(3) it is located at plastic stent (2) one end, main shaft (4) and plastic stent (2) junction bearing with plastic stent (2) junction bearing
Positioned at plastic stent (2) other end, occlusal area (7) is located in the middle part of plastic stent (2).
4. a kind of electric bridge according to claim 1 detects expansion of metal torque sensor, it is characterised in that：The monolithic
Machine (14) is 51 microcontrollers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810410171.XA CN108680294A (en) | 2018-05-02 | 2018-05-02 | A kind of electric bridge detection expansion of metal torque sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810410171.XA CN108680294A (en) | 2018-05-02 | 2018-05-02 | A kind of electric bridge detection expansion of metal torque sensor |
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| Publication Number | Publication Date |
|---|---|
| CN108680294A true CN108680294A (en) | 2018-10-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810410171.XA Pending CN108680294A (en) | 2018-05-02 | 2018-05-02 | A kind of electric bridge detection expansion of metal torque sensor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109751949A (en) * | 2019-01-10 | 2019-05-14 | 中国石油化工股份有限公司 | High-precision linear displacement measurement device and adjustment measurement method for executing agency |
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|---|---|---|---|---|
| CN104724244A (en) * | 2014-10-31 | 2015-06-24 | 太仓市悦博电动科技有限公司 | Built-in-motor electric-bicycle middle axle force moment sensing system |
| WO2015120644A1 (en) * | 2014-02-11 | 2015-08-20 | 苏州工业园区同盛车业有限公司 | Central shaft torque sensing device of electric bicycle |
| CN105015692A (en) * | 2014-04-22 | 2015-11-04 | 苏州八方电机科技有限公司 | Torque-speed sensing device for center shaft of electric bicycle |
| CN205589406U (en) * | 2016-04-19 | 2016-09-21 | 钟德斌 | Adopt bicycle helping hand system of axis torque sensor |
| CN206533202U (en) * | 2017-02-24 | 2017-09-29 | 南京拓科电子有限公司 | A kind of electric assisted bicycle pedal power signal detection modulation circuit |
| CN208223691U (en) * | 2018-05-02 | 2018-12-11 | 南京拓科电子有限公司 | A kind of electric bridge detection expansion of metal torque sensor |
-
2018
- 2018-05-02 CN CN201810410171.XA patent/CN108680294A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015120644A1 (en) * | 2014-02-11 | 2015-08-20 | 苏州工业园区同盛车业有限公司 | Central shaft torque sensing device of electric bicycle |
| CN105015692A (en) * | 2014-04-22 | 2015-11-04 | 苏州八方电机科技有限公司 | Torque-speed sensing device for center shaft of electric bicycle |
| CN104724244A (en) * | 2014-10-31 | 2015-06-24 | 太仓市悦博电动科技有限公司 | Built-in-motor electric-bicycle middle axle force moment sensing system |
| CN205589406U (en) * | 2016-04-19 | 2016-09-21 | 钟德斌 | Adopt bicycle helping hand system of axis torque sensor |
| CN206533202U (en) * | 2017-02-24 | 2017-09-29 | 南京拓科电子有限公司 | A kind of electric assisted bicycle pedal power signal detection modulation circuit |
| CN208223691U (en) * | 2018-05-02 | 2018-12-11 | 南京拓科电子有限公司 | A kind of electric bridge detection expansion of metal torque sensor |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109751949A (en) * | 2019-01-10 | 2019-05-14 | 中国石油化工股份有限公司 | High-precision linear displacement measurement device and adjustment measurement method for executing agency |
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