CN106839970A - A kind of steering wheel angle measurement apparatus and method for driving data acquisition system - Google Patents
A kind of steering wheel angle measurement apparatus and method for driving data acquisition system Download PDFInfo
- Publication number
- CN106839970A CN106839970A CN201710098003.7A CN201710098003A CN106839970A CN 106839970 A CN106839970 A CN 106839970A CN 201710098003 A CN201710098003 A CN 201710098003A CN 106839970 A CN106839970 A CN 106839970A
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- China
- Prior art keywords
- steering wheel
- foil gauge
- wheel angle
- data acquisition
- bridge circuit
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/30—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring angles or tapers; for testing the alignment of axes
Abstract
The invention discloses a kind of steering wheel angle measurement apparatus and method for driving data acquisition system, measurement apparatus include dynamometry housing, strain tube and data acquisition and control module, wherein shaft gear is equipped with dynamometry housing, the central shaft of shaft gear is connected with the rotating shaft of steering wheel for vehicle, shaft gear is meshed with the tooth bar for being located at dynamometry housing side, strain tube is located at the respective side of tooth bar, spring is equipped with strain tube, spring is connected with tooth bar, foil gauge is also equipped with strain tube, foil gauge is connected with data collection and control module, data collection and control module can receive and process the data that foil gauge is transmitted.Measuring method is：Step one：Carry out calibration experiment in advance；Step 2：Fitting function is set in advance in steering wheel angle analog controller；Step 3：Calculate steering wheel rotation angle.Beneficial effect：It is easy to separate and assembles and Measuring error；Effectively reduce measuring system cost.
Description
Technical field
It is more particularly to a kind of to gather system for driving data the present invention relates to a kind of steering wheel angle measurement apparatus and method
The steering wheel angle measurement apparatus and method of system.
Background technology
Currently, the acquisition technique of driving data is basis and the necessary links of driver's behavioral study, in running car
The behavioral study of driver has great significance, and the relevant information for obtaining driver's operation steering wheel is during driving data is gathered
An important ring.Driver rotate steering wheel whether and corresponding rotational angle all directly reflect driver manipulation be intended to
And vehicle running state.Existing steering wheel angle measurement apparatus and method for driving data acquisition system are often used and turned
Angle transducer, measuring system high cost, and it is difficult to the accurate measurement of steering wheel angle.China Patent Publication No. is
CN104236449A, publication date is 2014.12.24, in the invention that a kind of entitled steering wheel angle sensor is shown
Hold, rotational angle is obtained by processing the pulse signal that three magnet-sensitive elements are produced using photoelectric coding principle, to using ring
Border proposes requirement higher, and shock resistance is poor.
The content of the invention
It is high and be difficult to the invention aims to solve measurement cost present in existing driving data acquisition system
The steering wheel angle accurately problem of measurement and a kind of steering wheel angle measurement for driving data acquisition system for providing are provided
Device and method.
Provided by the present invention for driving data acquisition system steering wheel angle measurement apparatus include dynamometry housing, should
Become cylinder and data acquisition and control module, shaft gear, the central shaft and direction of traffic of shaft gear are wherein equipped with dynamometry housing
The rotating shaft of disk is connected, and shaft gear is meshed with the tooth bar for being located at dynamometry housing side, and strain tube is located at the respective side of tooth bar, should
Become in cylinder and be equipped with spring, spring is connected with tooth bar, foil gauge, foil gauge and data acquisition and control are also equipped with strain tube
Molding block is connected, and data collection and control module can receive and process the data that foil gauge is transmitted.
The modulus of shaft gear is 2.5, is provided with seven teeth, and shaft gear is assembled in dynamometry housing by the bearing at two ends,
Bearing is deep groove ball bearing 1622.
The modulus of tooth bar is 2.5, is provided with 24 teeth, the two ends of tooth bar be provided with smooth section carry out it is spacing.
Fixed seat is provided with the position of the bottom correspondence shaft gear of dynamometry housing, the position dress of correspondence shaft gear in fixed seat
Equipped with holddown spring.
Foil gauge is provided with eight, wherein the first foil gauge and the second foil gauge are located on the lateral wall on strain tube top, the
Three foil gauges and the 4th foil gauge are symmetrically arranged on the lateral wall of strain tube bottom, and the first foil gauge and the second foil gauge are connected to
Between a points and b points of both arms half-bridge circuit, the 3rd foil gauge and the 4th foil gauge are connected to the c points and d points of both arms half-bridge circuit
Between, the 5th foil gauge and the 6th foil gauge are connected between a points and d points of both arms half-bridge circuit, in both arms half-bridge circuit
B points and c points between be connected with the 7th foil gauge and the 8th foil gauge, data collection and control module is answered by wire with first
Become piece, the second foil gauge, the 3rd foil gauge and the 4th foil gauge to be connected.
Power supply, bridge circuit, steering wheel angle analog controller, master control switch are included in data collection and control module
And protective resistance, directly for bridge circuit is powered, the voltage of bridge circuit output acts on steering wheel angle simulation to wherein power supply
On controller, master control switch is located on the connection line of power supply and bridge circuit, and protective resistance is located at bridge circuit and steering wheel
On the connection line of corner simulation controller.
Provided by the present invention for the steering wheel rotation angle measurement method of driving data acquisition system, the following institute of its method
State：
Step one：Calibration experiment is carried out in advance, determines to be fitted between bridge circuit output voltage and steering wheel rotation angle
Function；
Step 2：Fitting function between output voltage and steering wheel rotation angle is set in advance in steering wheel angle mould
In plan controller；
Step 3：When driver rotates steering wheel, by the fitting for being set in steering wheel angle analog controller in advance
Function calculates steering wheel rotation angle.
Heretofore described foil gauge, power supply, steering wheel angle analog controller, master control switch and protective resistance are
The assembling of existing equipment, therefore, concrete model and specification are not repeated further.
Operation principle of the invention：
When driver rotate steering wheel when, shaft gear pinion rack motion while compression or elongation strain cylinder in
Spring, so that strain tube produces different degrees of miniature deformation, miniature deformation to change assembling because stress is of different sizes
The resistance size of foil gauge on strain tube lateral wall, causes the change of voltage Y in both arms half-bridge circuit, so that passing through
The fitting function for being set in steering wheel angle analog controller in advance calculates steering wheel rotation angle.
Beneficial effects of the present invention：
The measurement apparatus simple structure that the present invention is provided, using being detachably connected between each part, is easy to separation group
Dress and Measuring error；And the accurate measurement of steering wheel rotation angle is realized in the case where angular transducer is not used, is had
What is imitated reduces measuring system cost；The measurement apparatus and method that the present invention is provided are scientific research, teaching provides effective one kind
For the steering wheel angle measurement apparatus and method of driving data acquisition system, while realizing that steering wheel angle is accurately measured
Also save measurement cost.
Brief description of the drawings
Fig. 1 is device overall structure diagram of the present invention.
Fig. 2 is device decomposition texture schematic diagram of the present invention.
Fig. 3 is dynamometry housing cross section structure diagram of the present invention.
Fig. 4 is that both arms half-bridge circuit of the present invention arranges schematic diagram.
Fig. 5 is data collection and control modular structure schematic diagram of the present invention.
1st, dynamometry housing 2, strain tube 3, data collection and control module 4, shaft gear 5, central shaft 6, tooth bar 7,
Spring 8, bearing 9, smooth section 10, fixed seat 11, holddown spring 12, the first foil gauge 13, the second foil gauge 14,
Three foil gauges 15, the 4th foil gauge 16, the 5th foil gauge 17, the 6th foil gauge 18, the 7th foil gauge the 19, the 8th are strained
Piece 20, power supply 21, bridge circuit 22, steering wheel angle analog controller 23, master control switch 24, protective resistance.
Specific embodiment
Refer to shown in Fig. 1, Fig. 2, Fig. 3, Fig. 4 and Fig. 5：
Provided by the present invention for driving data acquisition system steering wheel angle measurement apparatus include dynamometry housing 1,
Be equipped with shaft gear 4 in strain tube 2 and data acquisition and control module 3, wherein dynamometry housing 1, the central shaft 5 of shaft gear 4 with
The rotating shaft of steering wheel for vehicle is connected, and shaft gear 4 is meshed with the tooth bar 6 for being located at the side of dynamometry housing 1, and strain tube 2 is located at tooth
Spring 7 is equipped with the respective side of bar 6, strain tube 2, spring 7 is connected with tooth bar 6, and foil gauge is also equipped with strain tube 2,
Foil gauge is connected with data collection and control module 3, and data collection and control module 3 can be received and process foil gauge and be passed
The data passed.
The modulus of shaft gear 4 is 2.5, is provided with seven teeth, and shaft gear 4 is assembled in dynamometry housing 1 by the bearing 8 at two ends
Interior, bearing 8 is deep groove ball bearing 1622.
The modulus of tooth bar 6 is 2.5, is provided with 24 teeth, the two ends of tooth bar 6 be provided with smooth section 9 carry out it is spacing.
Fixed seat 10 is provided with the position of the bottom correspondence shaft gear 4 of dynamometry housing 1, correspondence shaft gear 4 in fixed seat 10
Position be equipped with holddown spring 11.
Foil gauge is provided with eight, wherein the first foil gauge 12 and the second foil gauge 13 are located at the lateral wall on the top of strain tube 2
On, the 3rd foil gauge 14 and the 4th foil gauge 15 are symmetrically arranged on the lateral wall of the bottom of strain tube 2, the first foil gauge 12 and second
Foil gauge 13 is connected between a of both arms half-bridge circuit points and b points, and the 3rd foil gauge 14 and the 4th foil gauge 15 are connected to both arms
Between the c points and d points of half-bridge circuit, the 5th foil gauge 16 and the 6th is connected between a points and d points of both arms half-bridge circuit should
Become piece 17, the 7th foil gauge 18 and the 8th foil gauge 19, data acquisition are connected between the b points and c points of both arms half-bridge circuit
And control module 3 passes through wire and the first foil gauge 12, the second foil gauge 13, the 3rd foil gauge 14 and the phase of the 4th foil gauge 15
Even.
Included in data collection and control module 3 power supply 20, bridge circuit 21, steering wheel angle analog controller 22,
Master control switchs 23 and protective resistance 24, and wherein power supply 20 directly for bridge circuit 21 is powered, make by the voltage of the output of bridge circuit 21
With on steering wheel angle analog controller 22, master control switch 23 is located on the connection line of power supply 20 and bridge circuit 21, is protected
Shield resistance 24 is located on the connection line of bridge circuit 21 and steering wheel angle analog controller 22.
Provided by the present invention for the steering wheel rotation angle measurement method of driving data acquisition system, the following institute of its method
State：
Step one：Calibration experiment is carried out in advance, determines to intend between the output voltage of bridge circuit 21 and steering wheel rotation angle
Close function；
Step 2：Fitting function between output voltage and steering wheel rotation angle is set in advance in steering wheel angle mould
In plan controller 22；
Step 3：When driver rotates steering wheel, by the plan for being set in steering wheel angle analog controller 22 in advance
Close function and calculate steering wheel rotation angle.
Heretofore described foil gauge, power supply 20, steering wheel angle analog controller 22, master control switch 23 and protection electricity
Resistance 24 is the assembling of existing equipment, therefore, concrete model and specification are not repeated further.
Operation principle of the invention：
When driver rotates steering wheel, the pinion rack 6 of shaft gear 4 compression or elongation strain cylinder 2 while motion
Interior spring 7, so that strain tube 2 produces different degrees of miniature deformation, miniature deformation to change because stress is of different sizes
The resistance size of foil gauge on the lateral wall of strain tube 2 is assemblied in, causes the change of voltage Y in both arms half-bridge circuit, from
And make to calculate steering wheel rotation angle by the fitting function for being set in steering wheel angle analog controller 22 in advance.
In the rating test of measuring method of the present invention, bridge circuit output voltage Y is obtained by voltmeter measurement.
Fitting function acquisition methods (using taylor multinomials) are as described below：
Experimental calibration obtains m group bridge circuit output voltages and steering wheel angle data：
| k | 1 | 2 | … | m |
| Steering wheel angle x | … | |||
| Output voltage Y | … |
Independent variable vector is built in software matlab：Steering wheel angle x=[x1、X2 … Xm], input m group corners are defeated
Enter data；Build dependent variable vector bridge circuit output voltage：Y=[Y1、Y2 … Ym], it is input into corresponding m groups electric bridge output electricity
Pressure.
The exponent number c of fit equation is determined by following matlab programs first:
For i=1:5
y2=polyfit (x, y, i)；
Y=polyval (y2,x)；
if sum(Y-y)2<0.1% inequality 1, c=i% determines the value of fit equation exponent number c
break；end；end；
Fit equation exponent number c of the exponent number of fit equation when error amount quadratic sum is less than 0.1 is now obtained, if needed
Wanting higher precision can change the numerical value of constant term on the right side of inequality 1.
The following input function in matlab windows：
y1=polyfit (x, y, c)
Polynomial fit function coefficient is obtained by pressing enter key：
a0、a1……、an
aiIt is corresponding xn-iCoefficient, by so just can be written obtain fitting function：
Wherein n is fit equation exponent number.
By calibration experiment obtain electric bridge electricity 21 output voltages and steering wheel angle between fitting function after, will be fitted
Function is set in advance in steering wheel angle analog controller 22.Hereafter, it is electric to being sent into steering wheel angle analog controller 22
After the output voltage of bridge circuit 21, steering wheel angle analog controller 22 is exportable corresponding steering wheel angle signal, that is, obtain
Steering wheel rotation angle.
Claims (7)
1. a kind of steering wheel angle measurement apparatus for driving data acquisition system, it is characterised in that：Include dynamometry housing,
Shaft gear, central shaft and the vehicle side of shaft gear are equipped with strain tube and data acquisition and control module, wherein dynamometry housing
It is connected to the rotating shaft of disk, shaft gear is meshed with the tooth bar for being located at dynamometry housing side, and strain tube is located at the respective side of tooth bar,
Spring is equipped with strain tube, spring is connected with tooth bar, is also equipped with foil gauge on strain tube, foil gauge and data acquisition and
Control module is connected, and data collection and control module can receive and process the data that foil gauge is transmitted.
2. a kind of steering wheel angle measurement apparatus for driving data acquisition system according to claim 1, its feature
It is：The modulus of described shaft gear is 2.5, is provided with seven teeth, and shaft gear is assembled in dynamometry housing by the bearing at two ends
Interior, bearing is deep groove ball bearing 1622.
3. a kind of steering wheel angle measurement apparatus for driving data acquisition system according to claim 1, its feature
It is：The modulus of described tooth bar is 2.5, is provided with 24 teeth, the two ends of tooth bar be provided with smooth section carry out it is spacing.
4. a kind of steering wheel angle measurement apparatus for driving data acquisition system according to claim 1, its feature
It is：Fixed seat is provided with the position of the bottom correspondence shaft gear of described dynamometry housing, the portion of correspondence shaft gear in fixed seat
Position is equipped with holddown spring.
5. a kind of steering wheel angle measurement apparatus for driving data acquisition system according to claim 1, its feature
It is：Described foil gauge is provided with eight, wherein the first foil gauge and the second foil gauge are located on the lateral wall on strain tube top,
3rd foil gauge and the 4th foil gauge are symmetrically arranged on the lateral wall of strain tube bottom, and the first foil gauge and the second foil gauge are connected
Between a points and b points of both arms half-bridge circuit, the 3rd foil gauge and the 4th foil gauge are connected to the c points and d of both arms half-bridge circuit
Between point, the 5th foil gauge and the 6th foil gauge are connected between a points and d points of both arms half-bridge circuit, in both arms half-bridge electricity
The 7th foil gauge and the 8th foil gauge are connected between the b points and c points on road, data collection and control module passes through wire and first
Foil gauge, the second foil gauge, the 3rd foil gauge and the 4th foil gauge are connected.
6. a kind of steering wheel angle measurement apparatus for driving data acquisition system according to claim 1, its feature
It is：Power supply, bridge circuit, steering wheel angle analog controller, master control are included in described data collection and control module
Switch and protective resistance, directly for bridge circuit is powered, the voltage of bridge circuit output acts on steering wheel angle to wherein power supply
On analog controller, master control switch is located on the connection line of power supply and bridge circuit, and protective resistance is located at bridge circuit and turns
On connection line to disk corner simulation controller.
7. a kind of steering wheel rotation angle measurement method for driving data acquisition system, it is characterised in that：Its method is as follows
It is described：
Step one：Calibration experiment is carried out in advance, fitting function between bridge circuit output voltage and steering wheel rotation angle is determined；
Step 2：Fitting function between output voltage and steering wheel rotation angle is set in advance in steering wheel angle simulation control
In device processed；
Step 3：When driver rotates steering wheel, by the fitting function for being set in steering wheel angle analog controller in advance
Calculate steering wheel rotation angle.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710098003.7A CN106839970B (en) | 2017-02-23 | 2017-02-23 | A kind of steering wheel angle measurement apparatus and method for driving data acquisition system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710098003.7A CN106839970B (en) | 2017-02-23 | 2017-02-23 | A kind of steering wheel angle measurement apparatus and method for driving data acquisition system |
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| Publication Number | Publication Date |
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| CN106839970A true CN106839970A (en) | 2017-06-13 |
| CN106839970B CN106839970B (en) | 2018-01-19 |
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| CN201710098003.7A Active CN106839970B (en) | 2017-02-23 | 2017-02-23 | A kind of steering wheel angle measurement apparatus and method for driving data acquisition system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107591053A (en) * | 2017-10-18 | 2018-01-16 | 吉林大学 | A kind of steering feel simulation and climb displacement device applied to driving simulator |
| CN107784891A (en) * | 2017-12-13 | 2018-03-09 | 吉林大学 | A kind of steering feel simulation and corner measuring apparatus for driving simulation system |
| CN110442927A (en) * | 2019-07-17 | 2019-11-12 | 中国第一汽车股份有限公司 | A kind of steering wheel angle determines method, apparatus, equipment and storage medium |
| CN112754498A (en) * | 2021-01-11 | 2021-05-07 | 一汽解放汽车有限公司 | Driver fatigue detection method, device, equipment and storage medium |
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| CN103359167A (en) * | 2012-03-28 | 2013-10-23 | 比亚迪股份有限公司 | Method and device for measuring steering wheel rotation angle |
| CN103868446A (en) * | 2012-12-17 | 2014-06-18 | 联创汽车电子有限公司 | Steering wheel position detection circuit and steering wheel position detection method of EPS (Electric Power Steering) system |
| CN105667572A (en) * | 2014-11-20 | 2016-06-15 | 上海汽车集团股份有限公司 | Angle sensor, electric power steering system and method for obtaining steering wheel angle |
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| CN202063184U (en) * | 2011-01-20 | 2011-12-07 | 浙江吉利汽车研究院有限公司 | Corner detecting device for steering wheel of automobile |
| DE102012202639A1 (en) * | 2012-02-21 | 2013-08-22 | Robert Bosch Gmbh | Sensor arrangement i.e. steering angle sensor, for detection of steering angle at gear wheel in vehicle, has sensor determining covered distance of measuring element, where covered distance represents rotational angle of rotary component |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107591053A (en) * | 2017-10-18 | 2018-01-16 | 吉林大学 | A kind of steering feel simulation and climb displacement device applied to driving simulator |
| CN107784891A (en) * | 2017-12-13 | 2018-03-09 | 吉林大学 | A kind of steering feel simulation and corner measuring apparatus for driving simulation system |
| CN110442927A (en) * | 2019-07-17 | 2019-11-12 | 中国第一汽车股份有限公司 | A kind of steering wheel angle determines method, apparatus, equipment and storage medium |
| CN112754498A (en) * | 2021-01-11 | 2021-05-07 | 一汽解放汽车有限公司 | Driver fatigue detection method, device, equipment and storage medium |
| CN112754498B (en) * | 2021-01-11 | 2023-05-26 | 一汽解放汽车有限公司 | Driver fatigue detection method, device, equipment and storage medium |
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| CN106839970B (en) | 2018-01-19 |
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Inventor after: Zhu Bing Inventor after: Li Weinan Inventor after: Zhao Jian Inventor after: Han Jiayi Inventor after: Zhao Yiyan Inventor after: Zhang Ye Inventor after: Zhang Mingxing Inventor after: Hu Zhiqiang Inventor after: Li Xiangtai Inventor before: Li Weinan Inventor before: Zhu Bing Inventor before: Zhao Jian Inventor before: Li Xiangtai Inventor before: Zhao Yiyan Inventor before: Zhang Ye Inventor before: Zhang Mingxing Inventor before: Zhang Bing Inventor before: Ning Ken |
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