CN101402331A - Intelligent follow-up illumination method of car lamp - Google Patents
Intelligent follow-up illumination method of car lamp Download PDFInfo
- Publication number
- CN101402331A CN101402331A CNA2008102017497A CN200810201749A CN101402331A CN 101402331 A CN101402331 A CN 101402331A CN A2008102017497 A CNA2008102017497 A CN A2008102017497A CN 200810201749 A CN200810201749 A CN 200810201749A CN 101402331 A CN101402331 A CN 101402331A
- Authority
- CN
- China
- Prior art keywords
- speed
- sensor
- follow
- angle
- motor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Lighting Device Outwards From Vehicle And Optical Signal (AREA)
Abstract
The invention discloses a method for intelligent follow-up illumination of an automotive lamp. The method adopts a follow-up illumination device comprising a sensor component, an electronic control unit, a transmission line and an executing mechanism, and uses the sensor component comprising a speed sensor, an incremental photoelectric encoder, a gear signal sensor and a centripetal force sensor to detect the speed of automobiles, a steering wheel rotation angle and the centripetal force in real time, wherein the electronic control unit adopts a 32-bit high-speed digital signal processor to calculate the turning radius by using curve road mathematical model and according to the received steering wheel rotation angle signals, running speed signals, gear signals, centripetal force signals and motor angle feedback signals, and calculate the level angle of a stepper motor according to a formula so as to adjust a headlight illuminating angle to the inner side of a curved road automatically; and the method has the advantages of enhancing the view line for drivers on the curved road at night for the high degree of intellectualization, and decreasing accidents for the improved judgment .
Description
[technical field]
The present invention relates to Automobile manufacturing, vehicle electronics accessory technical field, the technical field of intelligent lighting being provided especially for automobile, motor bike, the concrete method that is meant a kind of car light intelligent follow-up illumination by digital signal processor (DSP) control.
[background technology]
The dynamic servo-actuated light modulation of car light bend mainly is for night travel provides illumination at Ackermann steer angle to the dark region of bend, to strengthen the observation of driver to bend, improves the convenient and safety of night driving.
What present prior art adopted on hardware is the mechanical type drive mechanism, adopts speed sensor and steering wheel angle sensor, and the drive mechanism that adds DC machine by turbine and worm horizontally rotating of Control of Automobile head light.Because mechanical type drive mechanism complexity, reliability is low; Low as the control accuracy of drive motor with DC machine, the speed of response of system is slow; Traditional steering wheel angle sensor is the rotation that the employing slide rheostat detects bearing circle, low precision; Therefore, prior-art devices is complex structure not only, and the execution speed when regulating is slow, and precision is low.
On control method, the number of sensors that prior art is provided with is less, basis for estimation to turn radius is single, just with the speed of a motor vehicle and steering wheel angle as the main basis for estimation of turn radius, can't satisfy the requirement of the dynamic servo-actuated light modulation of car light bend high reliability.
[summary of the invention]
The objective of the invention is to overcome the deficiencies in the prior art, the problem of sight line deficiency provides a kind of method of car light intelligent follow-up illumination during for the solution negotiation of bends, according to the degree of regulation of this method with the raising car light, control car light in high reliability ground rotates with the direction of bend, thereby improves the convenient and safety of night travel.
For achieving the above object, the technical scheme taked of the present invention is:
A kind of method of car light intelligent follow-up illumination, employing contains the follow-up illumination device of sensor module, electronic control unit, transmission route, actuating unit, detect the speed of vehicle, the corner and the centripetal force of bearing circle in real time with the sensor module that comprises speed sensor, incremental optical-electricity encoder, shift signal sensor, centripetal force sensor, and chain data is passed to electronic control unit by transmission route; Electronic control unit adopts high-revolving 32-bit number signal processor, the steering wheel angle signal, road speed signal, shift signal, centripetal force signal and the motor corner feedback signal that transmit according to transmission route, utilize two bend calculated with mathematical model turn radiuss, according to the level angle of mathematical formulae calculated step motor, with car headlight light angle automatically regulating to the highway curve inner side.
The formula of described bend math modeling (1) is: R=(1+AV
2) * (L/ δ)
Wherein: R is a turn radius, and A is a ballast, and V is the speed of a motor vehicle, and L is a front and back wheel axletree distance, and δ is the front-wheel steering wheel angle.
The formula of described bend math modeling (2) is: R=V
2/ g
Wherein: R is a turn radius, and V is the speed of a motor vehicle, and g is a centripetal force.
The mathematical formulae of described calculated step motor level angle is: ω=(180/ ∏) * (Vt/2R)
Wherein: ω is the stepping motor anglec of rotation, and V is the speed of a motor vehicle, and t is the time, generally got 3 seconds, is decided the angle of car light at last by anglec of rotation ω.
Pulse-width signal (PWM) the control step motor subdivision driver drive stepping motor of described digital signal processor output is done and is horizontally rotated, be connected with hall position sensor on the step motor shaft, its position of rotation with detected stepping motor rotating shaft feeds back to digital signal processor, thereby realizes the closed loop control of follow-up system.
Described actuating unit comprises micro-stepping driving of stepping motor device, stepping motor, car headlight.
The good effect of the method for a kind of car light intelligent follow-up illumination of the present invention is:
(1) adopts high-revolving 32-bit number signal processor TMS320LF2812 to substitute 8/16 MCU of the prior art, make equipment can satisfy the demand of follow-up illumination device real-time.
(2) on software, adopt two math modelings to calculate turn radius respectively, get their aviation value then, improved the particularity that turn radius calculates.
(3) make full use of existing electronic devices and components, utilize bend math modeling and mathematical formulae to calculate the level angle of turn radius and stepping motor, intelligent degree is higher, better the light angle of automatically regulating car headlight.
(4) commercialization of this method can solve night travel in the effective lighting of Ackermann steer angle to the bend dark region, and sight line strengthens when making the chaufeur night travel run into bend, and judgment improves, and can reduce the generation of accident.
[description of drawings]
Accompanying drawing 1 is the system architecture diagram of the method for a kind of car light intelligent follow-up illumination of the present invention;
Accompanying drawing 2 is the workflow block diagram of the method for a kind of car light intelligent follow-up illumination of the present invention.
[specific embodiment]
Provide the specific embodiment of the method for a kind of car light intelligent follow-up illumination of the present invention below in conjunction with accompanying drawing, still, the invention is not restricted to the embodiment of following introduction.
Referring to accompanying drawing 1.
A kind of method of car light intelligent follow-up illumination, employing contains the follow-up illumination device of sensor module, electronic control unit, transmission route, actuating unit, actuating unit comprises micro-stepping driving of stepping motor device, stepping motor, car headlight, detect the speed of vehicle, the corner and the centripetal force of bearing circle in real time with the sensor module that comprises speed sensor, incremental optical-electricity encoder, shift signal sensor, centripetal force sensor, and chain data is passed to electronic control unit by transmission route (CAN bus); Electronic control unit adopts high-revolving 32-bit number signal processor, pulse-width signal (PWM) the control step motor subdivision driver drive stepping motor of digital signal processor output is done and is horizontally rotated, be connected with hall position sensor on the step motor shaft, its position of rotation with detected stepping motor rotating shaft feeds back to digital signal processor, thereby realizes the closed loop control of follow-up system; The steering wheel angle signal that digital signal processor transmits according to transmission route, road speed signal, shift signal, centripetal force signal and motor corner feedback signal, utilize bend math modeling formula (1) and formula (2) to calculate turn radius:
Formula (1) is: R=(1+AV
2) * (L/ δ)
Wherein: R is a turn radius, and A is a ballast, and V is the speed of a motor vehicle, and L is a front and back wheel axletree distance, and δ is the front-wheel steering wheel angle;
Formula (2) is: R=V
2/ g
Wherein: R is a turn radius, and V is the speed of a motor vehicle, and g is a centripetal force;
The level angle of the feedback signal calculated step motor that rotates according to mathematical formulae (3) and shift signal, step motor shaft,
Formula (3) is: ω=(180/ ∏) * (Vt/2R)
Wherein: ω is the stepping motor anglec of rotation, and V is the speed of a motor vehicle, and t is the time, generally got 3 seconds, is decided the angle of car light at last by anglec of rotation ω;
With car headlight light angle automatically regulating to the highway curve inner side.
Referring to accompanying drawing 2.
In the method for a kind of car light intelligent follow-up illumination of the present invention, the operating range of follow-up illumination device motor level angle depends on the speed of a motor vehicle and turning radius, and the angle range of motor also has a boundary.At first, digital signal processor is according to the numerical value of sensor; Secondly, utilize formula (1) and formula (2) calculating turning radius, when turning radius during less than 25 meters, the motor of follow-up illumination device is failure to actuate, continue the numerical value of read sensor,, calculate the anglec of rotation of motor according to formula (3) when turning radius during greater than 25 meters; Once more, if this moment the speed of a motor vehicle in 10～100 kilometers/hour scopes, judge again the motor anglec of rotation whether 4 °＜| ω |＜19 ° of these scopes, if, then export the Stepping Motor Control amount, be not then to return and continue to understand sensor values.Go round and begin again.
Claims (6)
1, a kind of method of car light intelligent follow-up illumination, employing contains the follow-up illumination device of sensor module, electronic control unit, transmission route, actuating unit, detect the speed of vehicle, the corner and the centripetal force of bearing circle in real time with the sensor module that comprises speed sensor, incremental optical-electricity encoder, shift signal sensor, centripetal force sensor, and chain data is passed to electronic control unit by transmission route; Electronic control unit adopts high-revolving 32-bit number signal processor, the steering wheel angle signal, road speed signal, shift signal, centripetal force signal and the motor corner feedback signal that transmit according to transmission route, utilize two bend calculated with mathematical model turn radiuss, according to the level angle of mathematical formulae calculated step motor, with car headlight light angle automatically regulating to the highway curve inner side.
2, the method for car light intelligent follow-up illumination according to claim 1 is characterized in that, the formula of described bend math modeling (1) is: R=(1+AV
2) * (L/ δ), wherein: R is a turn radius, and A is a ballast, and V is the speed of a motor vehicle, and L is a front and back wheel axletree distance, and δ is the front-wheel steering wheel angle.
3, the method for car light intelligent follow-up illumination according to claim 1 is characterized in that, the formula of described bend math modeling (2) is: R=V
2/ g, wherein: R is a turn radius, and V is the speed of a motor vehicle, and g is a centripetal force.
4, the method for car light intelligent follow-up illumination according to claim 1, it is characterized in that, the mathematical formulae of described calculated step motor level angle is: ω=(180/ ∏) * (Vt/2R), wherein: ω is the stepping motor anglec of rotation, V is the speed of a motor vehicle, t is the time, generally got 3 seconds, is decided the angle of car light at last by anglec of rotation ω.
5, the method for car light intelligent follow-up illumination according to claim 1, it is characterized in that, pulse-width signal (PWM) the control step motor subdivision driver drive stepping motor of described digital signal processor output is done and is horizontally rotated, be connected with hall position sensor on the step motor shaft, its position of rotation with detected stepping motor rotating shaft feeds back to digital signal processor, thereby realizes the closed loop control of follow-up system.
6, the method for car light intelligent follow-up illumination according to claim 1 is characterized in that, described actuating unit comprises micro-stepping driving of stepping motor device, stepping motor, car headlight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102017497A CN101402331A (en) | 2008-10-24 | 2008-10-24 | Intelligent follow-up illumination method of car lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102017497A CN101402331A (en) | 2008-10-24 | 2008-10-24 | Intelligent follow-up illumination method of car lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101402331A true CN101402331A (en) | 2009-04-08 |
Family
ID=40536541
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008102017497A Pending CN101402331A (en) | 2008-10-24 | 2008-10-24 | Intelligent follow-up illumination method of car lamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101402331A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101770708B (en) * | 2010-01-28 | 2011-11-09 | 公安部交通管理科学研究所 | Simulation testing platform system for researching driving behaviors |
| CN103085709A (en) * | 2011-11-08 | 2013-05-08 | 通用汽车环球科技运作有限责任公司 | Active vision system with subliminally steered and modulated lighting |
| CN103863174A (en) * | 2013-01-29 | 2014-06-18 | 王洪新 | Predictive follow-up control method for vehicle headlamps |
| CN104477082A (en) * | 2014-07-11 | 2015-04-01 | 南京理学工程数据技术有限公司 | Excavator follow-up rotary lighting system and method |
| CN107284567A (en) * | 2017-07-11 | 2017-10-24 | 浙江大学常州工业技术研究院 | A kind of big lamp control method of four-wheel electric motor car |
| CN113911236A (en) * | 2021-10-14 | 2022-01-11 | 江苏爱玛车业科技有限公司 | Vehicle lamp control device |
| EP4112381A1 (en) * | 2021-06-29 | 2023-01-04 | Hyundai Mobis Co., Ltd. | Headlamp leveling device and headlamp leveling method for vehicle |
-
2008
- 2008-10-24 CN CNA2008102017497A patent/CN101402331A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101770708B (en) * | 2010-01-28 | 2011-11-09 | 公安部交通管理科学研究所 | Simulation testing platform system for researching driving behaviors |
| CN103085709A (en) * | 2011-11-08 | 2013-05-08 | 通用汽车环球科技运作有限责任公司 | Active vision system with subliminally steered and modulated lighting |
| CN103085709B (en) * | 2011-11-08 | 2015-10-28 | 通用汽车环球科技运作有限责任公司 | There is the active vision system of turning light and modulation illumination under threshold |
| CN103863174A (en) * | 2013-01-29 | 2014-06-18 | 王洪新 | Predictive follow-up control method for vehicle headlamps |
| CN103863174B (en) * | 2013-01-29 | 2016-03-30 | 王洪新 | A kind of vehicle head lamp forecasting type follow-up control method |
| CN104477082A (en) * | 2014-07-11 | 2015-04-01 | 南京理学工程数据技术有限公司 | Excavator follow-up rotary lighting system and method |
| CN104477082B (en) * | 2014-07-11 | 2016-08-31 | 南京理学工程数据技术有限公司 | A kind of excavator servo-actuated rotation illuminator and method thereof |
| CN107284567A (en) * | 2017-07-11 | 2017-10-24 | 浙江大学常州工业技术研究院 | A kind of big lamp control method of four-wheel electric motor car |
| EP4112381A1 (en) * | 2021-06-29 | 2023-01-04 | Hyundai Mobis Co., Ltd. | Headlamp leveling device and headlamp leveling method for vehicle |
| CN113911236A (en) * | 2021-10-14 | 2022-01-11 | 江苏爱玛车业科技有限公司 | Vehicle lamp control device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101402331A (en) | Intelligent follow-up illumination method of car lamp | |
| CN101817307B (en) | Power assembly for electric automobile | |
| CN202656920U (en) | Following illuminating device of vehicle at corners on basis of single chip microcomputer | |
| CN2803861Y (en) | Electric boosting steering system | |
| CN109017974A (en) | Assist steering system and its control method with active steering function | |
| CN202098458U (en) | Electrically-controlled electric four-wheel steering system | |
| CN202294949U (en) | Electric power steering system of off-highway vehicle | |
| CN202806604U (en) | Angle-adjustable back-up camera | |
| CN108216009A (en) | The self-adaptive headlamp system and its control method of a kind of Multi-information acquisition | |
| CN106364405A (en) | Rearview mirror lens automatic adjusting system and method for auxiliary steering | |
| CN101318518A (en) | Steering system of instruction car | |
| CN201573591U (en) | Automatic control system for vehicle lamp | |
| CN106541985A (en) | For the auto-pilot controller and its vehicle of unmanned electric vehicle | |
| CN201220608Y (en) | Electric tricycle and electric differential control device of electric automobile | |
| CN203047039U (en) | Multi-degree of freedom automotive headlamp control device | |
| CN2647705Y (en) | Electric power-assisted steering device with return control function | |
| CN201604573U (en) | Follow-up turning lighting device of automobile | |
| CN201980134U (en) | Vehicle lamp steering driver | |
| CN203020164U (en) | Curve self-adaption lighting device of automotive headlamp | |
| CN202966093U (en) | Follow-up illumination control device during automobile steering | |
| CN101549666A (en) | Automatic turn signal lamp | |
| CN109515210B (en) | Automatic gear switching system of pure electric vehicle | |
| CN205113423U (en) | Car four wheel steering system based on rear wheel independently turns to | |
| CN202243633U (en) | Electric steering device with automatic aligning function for automobile | |
| CN103661085A (en) | Car headlamp follow-up steering arc driving system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090408 |