CN108760133A - A kind of torque sensor - Google Patents
A kind of torque sensor Download PDFInfo
- Publication number
- CN108760133A CN108760133A CN201810811597.6A CN201810811597A CN108760133A CN 108760133 A CN108760133 A CN 108760133A CN 201810811597 A CN201810811597 A CN 201810811597A CN 108760133 A CN108760133 A CN 108760133A
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- Prior art keywords
- rotor
- coil
- shell
- torque sensor
- circuit board
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- 230000001939 inductive effect Effects 0.000 claims abstract description 26
- 238000004804 winding Methods 0.000 claims 1
- 238000001514 detection method Methods 0.000 abstract description 12
- 238000009434 installation Methods 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000006698 induction Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
-
- 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
- G01L5/221—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 steering wheels, e.g. for power assisted steering
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Power Steering Mechanism (AREA)
Abstract
The invention discloses a kind of torque sensors, including shell, bushing, the first rotor, the second rotor and circuit board, the bushing is threaded through on the shell, the first rotor is located at the hull outside, second rotor is located in the shell and is arranged on the bushing, the circuit board is mounted on the case inside and between the first rotor and the second rotor, the control circuit that inductive coil assembly is respectively equipped on the circuit board, is connect with the inductive coil assembly.Circuit board integrated level height in the present invention, good reliability, the operation is stable, long lifespan, overall structure of the present invention is simple, easy for installation, accuracy of detection is high, manufacturing cost is low.
Description
Technical field
The present invention relates to torque sensor technology fields, more specifically, it relates to a kind of torque sensor.
Background technology
Need to use torque sensor in the servo steering system of automobile, torque sensor to the input shaft of steering gear and
The torsional moment and corner of output shaft are detected, and testing result is fed back to ECU.Torque sensor used at present is main
It is divided into contact and contactless two kinds, contact torque sensor rubs due to always existing sliding between sensing element
It wipes, therefore is easy to be worn aging in use, the case where measuring signal inaccuracy even reports an error occur；It is contactless
What sensor utilized is the principle of electromagnetic induction, is equipped with permanent magnet and induction coil, or be equipped with magnet exciting coil and induction coil, deposits
In the problems such as complicated, installation is inconvenient, the operation is stable is poor, accuracy of detection is low.
Invention content
The technical problem to be solved by the present invention is to the above-mentioned deficiency for the prior art, the present invention provides a kind of structure letter
Torque sensor single, easy for installation, integrated level is high, good reliability, the operation is stable are high, accuracy of detection is high.
The technical scheme is that such：A kind of torque sensor, including shell, bushing, the first rotor, the second rotor
And circuit board, the bushing are threaded through on the shell, the first rotor is located at the hull outside, described
Second rotor is located in the shell and is arranged on the bushing, and the circuit board is mounted in the shell
Side and between the first rotor and the second rotor, is respectively equipped with inductive coil assembly and institute on the circuit board
State the control circuit of inductive coil assembly connection.
As a further improvement, the control circuit includes asic chip, AC power, amplifier block, filtering
Device assembly, the AC power are connect with the inductive coil assembly, and the inductive coil assembly passes sequentially through amplification
Device assembly, filter assembly are connect with the asic chip.
Further, the inductive coil assembly includes first coil, the second coil, tertiary coil, the 4th coil,
In, the first coil, the second coil are located at the one side of the circuit board, and the tertiary coil, the 4th coil are located at
The another side of the circuit board.
Further, the amplifier block includes 4 amplifiers, and the filter assembly includes 4 filters,
The first coil, the second coil, tertiary coil, the 4th coil pass sequentially through amplifier, filter and the institute respectively
The asic chip connection stated.
Further, the asic chip is equipped with the first channels PWM, the 2nd channels PWM, the 3rd PWM externally exported
Channel.
Further, the shell includes the first shell and second housing, and the first rotor is located at described first
The outside of shell.
Further, the first rotor is equipped with 9 teeth, correspondingly, second rotor is equipped with 18 teeth.
Further, second rotor is equipped with connector, and second rotor is by the connector set
If on the bushing.
Advantageous effect
Compared with prior art, the present invention have the advantage that for：
1, detection the first rotor, second may be implemented by the inductance variable quantity of the inductive coil assembly in detection circuit board
Torsional moment and the first rotor between rotor, bitrochanteric actual rotational angle, overall structure is simple, easy for installation, work is steady
Fixed high, accuracy of detection height；
2, setting and the corresponding first coil of the first rotor, the second coil and third line corresponding with the second rotor is set
Circle, the 4th coil, can effectively detect the relative rotation between the first rotor, the second rotor, to obtain the first rotor, second
The direction of rotation of rotor and torsional moment；
3, inductive coil assembly and control circuit are printed on circuit boards, integrated level is high, compact-sized, good reliability；
4, the inductance variable quantity for powering and detecting inductive coil assembly to inductive coil assembly by AC power, eliminates
Independent magnet exciting coil, manufacturing cost are low.
Description of the drawings
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is the schematic diagram of control circuit in the present invention.
Wherein：1- shells, 2- bushings, 3- the first rotors, the second rotors of 4-, 5- circuit boards, 6- connectors, outside 11- first
Shell, 12- second housings, U-ASIC chips, AC- AC powers, L1- first coils, the second coils of L2-, L3- tertiary coils, L4-
4th coil, Q- amplifiers, LB- filters, the first channels PWM P1-, the 2nd channels PWM P2-, the 3rd channels PWM P3-.
Specific implementation mode
The present invention is described further for specific embodiment in below in conjunction with the accompanying drawings.
Refering to fig. 1-2, a kind of torque sensor, including shell 1, bushing 2, the first rotor 3, the second rotor 4 and circuit board
5, bushing 2 is threaded through on shell 1, and the first rotor 3 is located at 1 outside of shell, and the second rotor 4, which is located in shell 1 and is arranged, to be mounted on
On bushing 2, circuit board 5 is mounted on 1 inside of shell and between the first rotor 3 and the second rotor 4；Bushing 2 is used for connecting vapour
The input shaft and output shaft of vehicle steering gear are equipped with elastic component between input shaft and output shaft, input shaft is deformed by elastic component will
Torque passes to output shaft, and the first rotor 3 and the second rotor 4 are made of stainless steel, the first rotor 3 and the second rotor 4 difference
Equipped with multiple teeth, the first rotor 3 is mounted on input shaft and is rotated with input shaft when practical application, the second rotor 4, bushing 2 with
Output shaft rotates, and circuit board 5 is static, turns relatively in the presence of certain between the first rotor 3 and the second rotor 4 when steering gear rotates
Angle, the size of relative rotation are corresponding with the size of torsional moment；It is respectively equipped with inductive coil assembly and the line of induction on circuit board 5
The control circuit of coil assembly connection, control circuit includes asic chip U, AC power AC, amplifier block, filter assembly,
AC power AC is connect with inductive coil assembly, and inductive coil assembly passes sequentially through amplifier block, filter assembly and ASIC
Chip U connections, asic chip U chips in order to control are equipped with multichannel analog signals input port and multi-path digital signal input port
And multi-path digital signal output port；The frequency f=3MHz of AC power AC, AC power AC make inductive coil assembly generate
The inductance of inductive coil assembly can be made to change after inductance and magnetic field, the first rotor 3 and the rotation of the second rotor 4, pass through detection
The torsional moment between detection the first rotor 3, the second rotor 4 and first turn may be implemented in the inductance variable quantity of inductive coil assembly
The actual rotational angle of sub 3, second rotor 4, overall structure is simple, easy for installation, the operation is stable is high, accuracy of detection is high；Circuit board 5 is
Pcb board, inductive coil assembly and control circuit are printed on circuit board 5, and integrated level is high, compact-sized, good reliability；Pass through friendship
Galvanic electricity source AC powers to inductive coil assembly and detects the inductance variable quantity of inductive coil assembly, eliminates independent excitation wire
Circle, manufacturing cost are low.
Inductive coil assembly includes first coil L1, the second coil L2, tertiary coil L3, the 4th coil L4, wherein first
Coil L1, the second coil L2 are located at the one side of circuit board 5, and tertiary coil L3, the 4th coil L4 are located at the other side of circuit board 5
Face, first coil L1, the second coil L2 are corresponding with the first rotor 3, tertiary coil L3, the 4th coil L4 and 4 phase of the second rotor
It is corresponding, wiring can be facilitated and reduce interference, can effectively detect the relative rotation between the first rotor 3, the second rotor 4, from
And obtain the rotation angle of the direction of rotation and torsional moment and the first rotor 3 of the first rotor 3, the second rotor 4.
Amplifier block includes 4 amplifier Q, and filter assembly includes 4 filter LB, first coil L1, the second line
Circle L2, tertiary coil L3, the 4th coil L4 passes sequentially through amplifier Q respectively, filter LB is connect with asic chip U, specifically,
AC power AC is connect with the both ends of first coil L1, the second coil L2, tertiary coil L3, the 4th coil L4 respectively, First Line
Circle L1, the second coil L2, tertiary coil L3, the 4th coil L4 intermediate point pass sequentially through amplifier Q, filter LB and ASIC core
Piece U connections, amplifier Q can effectively amplify the voltage signal of coil voltage variation, and voltage signal is corresponding with inductance variable quantity, filter
Wave device LB can effectively improve the stability of voltage signal to improve the precision and stability of asic chip U acquisitions.
Asic chip U can be obtained after handling the signal of acquisition steering gear input torque and direction of rotation and
Rotation angle, asic chip U are equipped with the first channels PWM P1, the 2nd channels PWM P2, the 3rd channels the PWM P3 externally exported, the
One channels PWM P1, the 2nd channels PWM P2 are redundant channel, correspond to the relative rotation between the first rotor 3, the second rotor 4,
Can detect relative rotation be more than and direction, the 3rd channels PWM P3 is for 3 actual rotation angle of the first rotor, three road PWM
It channel can be with guaranteed accuracy of detection.
Shell 1 includes the first shell 11 and second housing 12, and the first rotor 3 is located at the outside of the first shell 11, first turn
Son 3 is equipped with 9 teeth, correspondingly, the second rotor 4 is equipped with 18 teeth, while having taken into account and having facilitated manufacture and accuracy of detection high
Advantage, the second rotor 4 is equipped with connector 6, and the second rotor 4 is arranged on bushing 2 by the connector 6, both
It can guarantee that the second rotor 4 is effectively connect to ensure accuracy of detection with bushing 2, and can facilitate and the second rotor 4 is assembled with bushing 2.
What has been described above is only a preferred embodiment of the present invention, it should be pointed out that for those skilled in the art,
Without departing from the structure of the invention, several modifications and improvements can also be made, these all do not interfere with implementation of the present invention
Effect and patent practicability.
Claims (8)
1. a kind of torque sensor, it is characterised in that：Including shell (1), bushing (2), the first rotor (3), the second rotor (4) and
Circuit board (5), the bushing (2) are threaded through on the shell (1), and the first rotor (3) is located at the shell
(1) outside, second rotor (4) is located in the shell (1) and is arranged on the bushing (2), described
Circuit board (5) is mounted on the inside of the shell (1) and between the first rotor (3) and the second rotor (4), described
Circuit board (5) on the control circuit that is respectively equipped with inductive coil assembly, is connect with the inductive coil assembly.
2. a kind of torque sensor according to claim 1, it is characterised in that：The control circuit includes asic chip
(U), AC power (AC), amplifier block, filter assembly, the AC power (AC) and the inductive coil assembly
Connection, the inductive coil assembly passes sequentially through amplifier block, filter assembly is connect with the asic chip (U).
3. a kind of torque sensor according to claim 2, it is characterised in that：The inductive coil assembly includes first
Coil (L1), the second coil (L2), tertiary coil (L3), the 4th coil (L4), wherein the first coil (L1), second
Coil (L2) is located at the one side of the circuit board (5), and the tertiary coil (L3), the 4th coil (L4) are located at the circuit
The another side of plate (5).
4. a kind of torque sensor according to claim 3, it is characterised in that：The amplifier block is put including 4
Big device (Q), the filter assembly include 4 filters (LB), the first coil (L1), the second coil (L2), the
Three-winding (L3), the 4th coil (L4) pass sequentially through the amplifier (Q), filter (LB) and the asic chip respectively
(U) it connects.
5. a kind of torque sensor according to claim 2, it is characterised in that：The asic chip (U) is equipped with external
The first channels PWM (P1), the 2nd channels PWM (P2), the 3rd channels PWM (P3) of output.
6. a kind of torque sensor according to claim 1, it is characterised in that：The shell (1) includes the first shell
(11) and second housing (12), the first rotor (3) are located at the outside of first shell (11).
7. a kind of torque sensor according to claim 1, it is characterised in that：The first rotor (3) is equipped with 9
Tooth, correspondingly, second rotor (4) is equipped with 18 teeth.
8. a kind of torque sensor according to claim 1, it is characterised in that：Second rotor (4), which is equipped with, to be connected
Fitting (6), and second rotor (4) is arranged on the bushing (2) by the connector (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810811597.6A CN108760133A (en) | 2018-07-23 | 2018-07-23 | A kind of torque sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810811597.6A CN108760133A (en) | 2018-07-23 | 2018-07-23 | A kind of torque sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108760133A true CN108760133A (en) | 2018-11-06 |
Family
ID=63971150
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810811597.6A Pending CN108760133A (en) | 2018-07-23 | 2018-07-23 | A kind of torque sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108760133A (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0688757A (en) * | 1992-09-07 | 1994-03-29 | Koyo Seiko Co Ltd | Torque sensor |
| CN2359685Y (en) * | 1999-03-01 | 2000-01-19 | 洪惟义 | Strain inductive coupling transmission type torque sensor |
| JP2001341654A (en) * | 2000-05-31 | 2001-12-11 | Koyo Seiko Co Ltd | Electric power steering device |
| CN1576814A (en) * | 2003-07-16 | 2005-02-09 | 株式会社万都 | Torque detector |
| CN201021909Y (en) * | 2006-12-18 | 2008-02-13 | 比亚迪股份有限公司 | Torque sensor |
| CN104061854A (en) * | 2014-05-11 | 2014-09-24 | 浙江大学 | PCB coil and angle measuring method for electromagnetic induction type angle sensor apparatus |
| CN205120295U (en) * | 2015-11-26 | 2016-03-30 | 哈尔滨力盛达机电科技有限公司 | Vertical non -contact electromagnetic induction torque sensor |
| CN106197255A (en) * | 2016-07-07 | 2016-12-07 | 安徽沃巴弗电子科技有限公司 | A kind of induction moment of torsion angular transducer |
| CN206146372U (en) * | 2016-08-31 | 2017-05-03 | 安徽沃巴弗电子科技有限公司 | Inductance type sensor based on redundant formula design |
| CN106679560A (en) * | 2016-12-02 | 2017-05-17 | 安徽沃巴弗电子科技有限公司 | Electromagnetic induction type torque angle sensor |
| CN106793452A (en) * | 2016-12-02 | 2017-05-31 | 安徽沃巴弗电子科技有限公司 | A kind of means for anti-jamming |
-
2018
- 2018-07-23 CN CN201810811597.6A patent/CN108760133A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0688757A (en) * | 1992-09-07 | 1994-03-29 | Koyo Seiko Co Ltd | Torque sensor |
| CN2359685Y (en) * | 1999-03-01 | 2000-01-19 | 洪惟义 | Strain inductive coupling transmission type torque sensor |
| JP2001341654A (en) * | 2000-05-31 | 2001-12-11 | Koyo Seiko Co Ltd | Electric power steering device |
| CN1576814A (en) * | 2003-07-16 | 2005-02-09 | 株式会社万都 | Torque detector |
| CN201021909Y (en) * | 2006-12-18 | 2008-02-13 | 比亚迪股份有限公司 | Torque sensor |
| CN104061854A (en) * | 2014-05-11 | 2014-09-24 | 浙江大学 | PCB coil and angle measuring method for electromagnetic induction type angle sensor apparatus |
| CN205120295U (en) * | 2015-11-26 | 2016-03-30 | 哈尔滨力盛达机电科技有限公司 | Vertical non -contact electromagnetic induction torque sensor |
| CN106197255A (en) * | 2016-07-07 | 2016-12-07 | 安徽沃巴弗电子科技有限公司 | A kind of induction moment of torsion angular transducer |
| CN206146372U (en) * | 2016-08-31 | 2017-05-03 | 安徽沃巴弗电子科技有限公司 | Inductance type sensor based on redundant formula design |
| CN106679560A (en) * | 2016-12-02 | 2017-05-17 | 安徽沃巴弗电子科技有限公司 | Electromagnetic induction type torque angle sensor |
| CN106793452A (en) * | 2016-12-02 | 2017-05-31 | 安徽沃巴弗电子科技有限公司 | A kind of means for anti-jamming |
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Application publication date: 20181106 |