CN201983887U - Non-contact torque sensor and electric power-assisted steering system - Google Patents
Non-contact torque sensor and electric power-assisted steering system Download PDFInfo
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- CN201983887U CN201983887U CN2010206537686U CN201020653768U CN201983887U CN 201983887 U CN201983887 U CN 201983887U CN 2010206537686 U CN2010206537686 U CN 2010206537686U CN 201020653768 U CN201020653768 U CN 201020653768U CN 201983887 U CN201983887 U CN 201983887U
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- 230000008878 coupling Effects 0.000 claims abstract description 7
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 5
- 239000011889 copper foil Substances 0.000 claims description 5
- 238000001514 detection method Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 3
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- 238000005299 abrasion Methods 0.000 abstract 1
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Abstract
The utility model provides a non-contact torque sensor and an electric power-assisted steering system using the sensor. The technical scheme is that by making use of wireless energy and signal transmission of two coupling coils, a torque signal acquired through detection and processing by a second coupling coil is coupled to a first coupling coil and output to an electric power-assisted steering controller, the controller outputs a control signal to control an assistant motor, and the corresponding steering assistant power is transferred to vehicle wheels through a speed reducer, therefore, wireless transmission of the torque signal is realized, abrasion caused by contact torque sensing is avoided, and the service life is prolonged. The non-contact torque sensor and the electric power-assisted steering system have simple structures, lower manufacture cost, high sensitivity and higher reliability.
Description
Technical field
The utility model relates to the vehicle booster steering, is specifically related to a kind of noncontact torque sensor that vehicle booster turns to and electric boosting steering system that uses this sensor of being used for.
Background technology
Automobile steering system is one of important composition system of automobile; the performance of steering directly has influence on the control stability of automobile, and it plays an important role for the safety traffic of guaranteeing vehicle, the personal safety that reduces traffic hazard and protection driver, the condition of work of improving the driver.Electric boosting steering system is because of the main flow trend of its energy-conserving and environment-protective, simple in structure, advantage becomes current automobile steering system such as assist characteristic is easy to control.
Electric boosting steering system mainly is made up of torque sensor, vehicle speed sensor, assist motor and speed reduction unit, control module etc.Bearing circle is applied to the torque signal on the steering axle during generally by torque sensor induction steering operation, and converts electric signal to and send control module to, drives assist motor and produces suitable power-assisted, helps the driver to finish steering operation.
Torque sensor is the key device of electric power steering, mainly contains contact and contactless two kinds.What contact was used morely is the potentiometer type torque sensor, when on the bearing circle moment of torsion being arranged, the torsion bar that is attached thereto relatively rotates, and the annulus that the torsion bar below connects moves up and down, the rotation of ring belt electrokinetic potential device is by change in voltage that detects potentiometer and then the size that obtains moment of torsion.Because potentiometer, annulus and fixed wall constantly rub, easily produce wearing and tearing, greatly reduce the accuracy of detection and the serviceable life of sensor.
Contactless comparatively typically have induction, input shaft is connected by torsion bar with output shaft, when torsion bar is twisted by the rotating torque effect of bearing circle, relative position on spline on the input shaft and the output shaft between the keyway just is changed, make the magnetic induction on the spline change, the variation of magnetic induction is converted into voltage signal by coil.Yet the measurement of magneto-electric is subjected to magnetic field and Temperature Influence easily, and the spline on the axle and the processing of keyway and accuracy requirement make technology comparatively complicated.
The non-contact type photoelectricity torque sensing that adopts in luxury car is to measure the angle that torsion bar reverses by the relative displacement of grating, variation with light is converted into torque signal again, though photo-electric detects no wear problems and precision height, but it is because very strict to the accuracy requirement of grating, so complex process, cost is very high.
Summary of the invention
This is suitable for novel purpose is the above-mentioned shortcoming that exists at prior art, provide a kind of simple in structure, manufacturing cost is lower, and noncontact torque sensor highly sensitive, good reliability, and the electric boosting steering system that uses this sensor.
For achieving the above object, noncontact torque sensor of the present utility model adopts following technical scheme:
A kind of noncontact torque sensor, comprise shell, input shaft, output shaft and torsion bar, also comprise first pickup coil that is fixed on described outer casing inner wall, and be fixed on second pickup coil on the described torsion bar, torsion bar passes described two pickup coils, and first pickup coil relies on the external power source that connects, and second pickup coil connects torque detecting unit, second pickup coil obtains power supply energy by the coupling with first pickup coil, and carries out transmission of wireless signals with it.Torque detecting unit collects the change in torque of torsion bar and handles, torque signal is radioed to first pickup coil by second pickup coil, export the electric power steering control module that is connected with first pickup coil to, the control assist motor provides power steering.
Described second pickup coil is fixed on the torsion bar by a fixed support, second pickup coil rotates with torsion bar, fixed support can be a sleeve, torsion bar passes sleeve, sleeve is connected and fixed near an end and the torsion bar of input shaft, second pickup coil and the sleeve other end are fixed, and the torsion bar diameter is little than the internal diameter of the sleeve and second pickup coil.
Described first and second pickup coils can be the pcb board with specific Copper Foil wiring, and promptly the printing Copper Foil on the pcb board can be used as wireless transmit and receiving antenna.
Described torque detecting unit can comprise Hall element.
Described torque detecting unit can comprise resistance strain gage.
A kind of electric boosting steering system comprises above-mentioned arbitrary noncontact torque sensor.
Compare the contact torque sensor, non-contact torque sensor of the present utility model has been realized detection and transmission to torque signal by adopting wireless energy and signal transmission manner, by not directly contact and friction of detection part, so there are not the machinery wearing and tearing, can not cause wearing and tearing, have better durability because of frequent the use.
The utility model not only guarantees higher measuring accuracy, and simple in structure, low cost of manufacture,
Description of drawings
Fig. 1 is a torque sensor structural principle block diagram of the present utility model;
Fig. 2 is an electric boosting steering system block diagram of the present utility model.
Embodiment
Further specify the technical solution of the utility model below in conjunction with embodiment and accompanying drawing.
As Fig. 1-2, the 1st, output shaft, the 2nd, torque detecting unit, the 3rd, disk, 4 is second pickup coils, the 5th, shell, 6 is first pickup coils, the 7th, sleeve, the 8th, torsion bar, the 9th, bearing, the 10th, input shaft.
Noncontact torque sensor of the present utility model, comprise shell 5, input shaft 10, output shaft 1 and torsion bar 8, input and output shaft connects the two ends of torsion bar 8 by bearing 9, also comprise first pickup coil 6 on the inwall that is fixed on described shell 5, and be fixed on second pickup coil 4 on the described torsion bar 8, torsion bar 8 passes described two pickup coils, first pickup coil 6 relies on the external power source that connects, second pickup coil 4 connects torque detecting unit 2, second pickup coil 4 obtains power supply energy by the coupling with first pickup coil 6, and carries out transmission of wireless signals with it.Torque detecting unit 2 collects the change in torque of torsion bar 8 and handles, torque signal is radioed to first pickup coil 6 by second pickup coil 4, export the power-assisted control module that is connected with first pickup coil 6 to, the control assist motor provides power steering.
Be fixed with a disk 3 at torsion bar 8 near output shaft one end, second pickup coil 4 is fixed on the torsion bar 8 by a fixed support, the fixed support of selecting for use in the present embodiment is a sleeve 7, sleeve 7 is for having the hollow barrel mast of certain-length, torsion bar 8 passes sleeve 7, and sleeve 7 is connected and fixed near an end and the torsion bar 8 of input shaft 10, and second pickup coil 4 is fixed on sleeve 7 near on the other end of output shaft 1, relative with disk 3, the diameter of torsion bar 8 is little than the internal diameter of the sleeve 7 and second pickup coil 4.Therefore torsion bar 8 is passed to second pickup coil 4 by the rotation variation of input shaft 10 1 ends by the sleeve 7 that connects, and the deformation of torsion bar 8 is the rotational angle of second pickup coil, 4 relative disks 3.
The torque detecting unit 2 of present embodiment comprises Hall element and signal processing module, the relative magnet of a pair of magnetic pole is housed on the circumference of disk 3, two magnet are certain width at interval, on the center of second pickup coil, 4 corresponding two magnet, Hall element is housed, constitute Hall element, Hall element connects signal processing module, when second pickup coil 4 rotates, Hall element departs from the center of two magnet on the disk 3, Hall element departs from the changes of magnetic field that causes with rotation and transfers the correspondent voltage signal to and send into signal processing module and carry out A/D conversion, and calculate with the torsion bar elasticity coefficient that prestores, obtain being applied to the torque signal on the torsion bar 8.In order to make the moment of torsion data acquisition more accurate and have more reliability, two groups of Hall elements can be set, two groups of magnet promptly are set on the disk 3, on the position of second pickup coil, 4 correspondences two Hall elements are set.
Another embodiment of the present utility model, be that torque detecting unit 2 comprises resistance strain gage and signal processing module, resistance strain gage is attached on the torsion bar 8, directly detect the torque information of torsion bar, therefore do not need to place the disk 3 of magnet among this embodiment, and the fixed support of second pickup coil 4 can be selected the simple plane part for use, second pickup coil 4 is fixed on the torsion bar 8 get final product, resistance strain gage with the data that detect by signal wire transmits to signal processing module.
First and second pickup coils can be made the pcb board with specific Copper Foil wiring, and promptly the printing Copper Foil on the pcb board can be used as wireless transmit and receiving antenna.Then Hall element among first embodiment and signal processing module all can be integrated on the pcb board with second pickup coil, have reduced the volume of sensing element, assemble simpler.
Electric boosting steering system of the present utility model comprises above-mentioned arbitrary noncontact torque sensor.Structural drawing such as accompanying drawing 2.The input shaft of torque sensor links to each other with bearing circle, and output shaft links to each other with speed reduction unit, and first pickup coil and assist motor in assist controller and the torque sensor are connected, and assist motor exports speed reduction unit to, and assist controller is powered by vehicle power.First pickup coil provides power supply by vehicle power through assist controller, and second pickup coil obtains energy and transmits signal with it by the coupling with first pickup coil.
When vehicle turns to, driver's direction of passage dish input torque, cause the torsion bar distortion in the torque sensor, second pickup coil detects torque signal and is wirelessly transmitted to first pickup coil, export assist controller again to, assist controller is passed to gear train through speed reduction unit with required power steering according to the operation of survey torque signal control assist motor, realizes electric power steering.
Claims (7)
1. noncontact torque sensor, comprise shell, input shaft, output shaft and torsion bar, it is characterized in that: also comprise first pickup coil that is fixed on described outer casing inner wall, and be fixed on second pickup coil on the described torsion bar, torsion bar passes described two pickup coils, first pickup coil relies on the external power source that connects, second pickup coil connects torque detecting unit, second pickup coil obtains power supply energy by the coupling with first pickup coil, and carries out transmission of wireless signals with it.
2. noncontact torque sensor according to claim 1 is characterized in that: described second pickup coil is fixed on the torsion bar by a fixed support, and second pickup coil rotates with torsion bar.
3. noncontact torque sensor according to claim 2, it is characterized in that: described fixed support can be a sleeve, torsion bar passes sleeve, sleeve is connected and fixed near an end and the torsion bar of input shaft, second pickup coil and the sleeve other end are fixed, and the torsion bar diameter is little than the internal diameter of the sleeve and second pickup coil.
4. noncontact torque sensor according to claim 1 is characterized in that: described first and second pickup coils can be the pcb board with specific Copper Foil wiring.
5. noncontact torque sensor according to claim 1 is characterized in that: described torque detecting unit can comprise Hall element.
6. noncontact torque sensor according to claim 1 is characterized in that: described torque detecting unit can comprise resistance strain gage.
7. an electric boosting steering system is characterized in that: the arbitrary noncontact torque sensor that comprises claim 1～6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206537686U CN201983887U (en) | 2010-12-09 | 2010-12-09 | Non-contact torque sensor and electric power-assisted steering system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206537686U CN201983887U (en) | 2010-12-09 | 2010-12-09 | Non-contact torque sensor and electric power-assisted steering system |
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| CN201983887U true CN201983887U (en) | 2011-09-21 |
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| CN2010206537686U Expired - Fee Related CN201983887U (en) | 2010-12-09 | 2010-12-09 | Non-contact torque sensor and electric power-assisted steering system |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102589772A (en) * | 2012-03-21 | 2012-07-18 | 株洲易力达机电有限公司 | Novel electric power steering system torque sensor |
| CN102721497A (en) * | 2012-07-09 | 2012-10-10 | 上海电机学院 | Sensor coil assembly and EPS assembly provided with same |
| WO2015096485A1 (en) * | 2013-12-26 | 2015-07-02 | 苏州万佳电器有限公司 | Center-mounted control system of bicycle |
| CN106849521A (en) * | 2015-09-30 | 2017-06-13 | 西门子公司 | It is used in particular for the electric motor units of electricity or motor vehicle driven by mixed power |
| CN109211447A (en) * | 2017-07-09 | 2019-01-15 | 东北林业大学 | A kind of passive and wireless automobile C-EPS system torque measuring device |
| CN110793687A (en) * | 2019-12-09 | 2020-02-14 | 邹奇峰 | EPS torque sensor for detecting torque by adopting strain gauge mode |
| CN111245431A (en) * | 2020-03-24 | 2020-06-05 | 德威(苏州)新能源有限公司 | Module framework integrating wireless power supply and signal interaction and application |
| CN113125062A (en) * | 2021-04-08 | 2021-07-16 | 大川电机科技(江苏)有限公司 | Non-contact phase difference type torque sensing device |
| CN113465801A (en) * | 2021-08-14 | 2021-10-01 | 东莞市南力测控设备有限公司 | Non-contact magnetic coupling torque sensor |
| WO2023245506A1 (en) * | 2022-06-22 | 2023-12-28 | Chan Yuk Chun Jon | A torque sensing system, a power control system, a conversion kit with a torque sensing system, and a vehicle with a torque sensing system |
| CN117647345A (en) * | 2024-01-29 | 2024-03-05 | 上海固极智能科技股份有限公司 | Hall effect-based torque measurement method |
-
2010
- 2010-12-09 CN CN2010206537686U patent/CN201983887U/en not_active Expired - Fee Related
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102589772A (en) * | 2012-03-21 | 2012-07-18 | 株洲易力达机电有限公司 | Novel electric power steering system torque sensor |
| CN102589772B (en) * | 2012-03-21 | 2013-12-18 | 株洲易力达机电有限公司 | Electric power steering system torque sensor |
| CN102721497A (en) * | 2012-07-09 | 2012-10-10 | 上海电机学院 | Sensor coil assembly and EPS assembly provided with same |
| WO2015096485A1 (en) * | 2013-12-26 | 2015-07-02 | 苏州万佳电器有限公司 | Center-mounted control system of bicycle |
| US9969461B2 (en) | 2013-12-26 | 2018-05-15 | Suzhou Tergar Iot Technology Co., Ltd | Center-mounted control system of bicycle |
| CN106849521A (en) * | 2015-09-30 | 2017-06-13 | 西门子公司 | It is used in particular for the electric motor units of electricity or motor vehicle driven by mixed power |
| CN109211447A (en) * | 2017-07-09 | 2019-01-15 | 东北林业大学 | A kind of passive and wireless automobile C-EPS system torque measuring device |
| CN110793687A (en) * | 2019-12-09 | 2020-02-14 | 邹奇峰 | EPS torque sensor for detecting torque by adopting strain gauge mode |
| CN111245431A (en) * | 2020-03-24 | 2020-06-05 | 德威(苏州)新能源有限公司 | Module framework integrating wireless power supply and signal interaction and application |
| CN113125062A (en) * | 2021-04-08 | 2021-07-16 | 大川电机科技(江苏)有限公司 | Non-contact phase difference type torque sensing device |
| CN113465801A (en) * | 2021-08-14 | 2021-10-01 | 东莞市南力测控设备有限公司 | Non-contact magnetic coupling torque sensor |
| WO2023245506A1 (en) * | 2022-06-22 | 2023-12-28 | Chan Yuk Chun Jon | A torque sensing system, a power control system, a conversion kit with a torque sensing system, and a vehicle with a torque sensing system |
| CN117647345A (en) * | 2024-01-29 | 2024-03-05 | 上海固极智能科技股份有限公司 | Hall effect-based torque measurement method |
| CN117647345B (en) * | 2024-01-29 | 2024-04-16 | 上海固极智能科技股份有限公司 | Hall effect-based torque measurement method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110921 Termination date: 20141209 |
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| EXPY | Termination of patent right or utility model |