CN1584538A - Detection and correction for distancing light and detector relative position - Google Patents
Detection and correction for distancing light and detector relative position Download PDFInfo
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- CN1584538A CN1584538A CN 200410049436 CN200410049436A CN1584538A CN 1584538 A CN1584538 A CN 1584538A CN 200410049436 CN200410049436 CN 200410049436 CN 200410049436 A CN200410049436 A CN 200410049436A CN 1584538 A CN1584538 A CN 1584538A
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- high beam
- distance
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- photometry
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Abstract
A method for measuring relative position of distance light to detector includes using cetre connection line of light in parallel to track of detector as centring position of the light and detector, moving up and down as well as left and right in certain distance for contring light source centre to light test screen centre, measuring equal height h and vertical distance, L3 and l4 of the two to obtain centre distance l5 and error angle Q, using these figure to revise detection value.
Description
Technical field
When the present invention is the car headlamp detection,, thereby improve the headlamp accuracy of detection, belong to the vehicle testing technique field by the relative position of accurate detection high beam and detector.
Background technology
Car headlamp divides high beam and dipped headlights, and high beam has the requirement of light intensity and irradiation position, and dipped headlights also has the requirement of irradiation position, is the essential condition that guarantees that the automobile night safe travels.Because the headlamp light intensity is to convert and get by detecting illumination, after detecting illumination, calculate light intensity and be and square being directly proportional of light source distance, so the distance error that the center is shielded in high beam light source and detector photometry is bigger, then can have a strong impact on the accuracy of detection of light intensity.The angle limit value of headlamp irradiation position is very little, vehicle headlamp that stand caused at random and detector site error, directly influencing the headlamp level penetrates distance partially, headlamp detects at present, both do not detected the distance of high beam light source and photometry screen, also do not detect the angular error of the relative detector of headlamp, light intensity that is detected and irradiation position error are very big, repeated extreme difference.For overcoming above-mentioned deficiency, the present invention revises detected value by detecting the distance and the relative error angle of high beam light source and detector, accurately detects light intensity and irradiation position.
Summary of the invention
Existing full-automatic headlamp aligner has the function that detects headlamp illumination, drift angle, the beam irradiation position left and right sides and last aforesaid downward angle, and the photometry screen has at the parallel orbit translation functions and moves up and down and height measurement function.The present invention increases on existing detector function and uses technology such as existing ultrasound wave or laser ranging, is parallel to the detector track as headlamp or the relative centering with detector of vehicle position with the left-right symmetric high beam light source line of centres.Suppose when the vehicle zero load is placed on the level land that the light source center of two symmetrical high beams is three-dimensional symmetry with the relative vehicle of the anterior curved surface of pilothouse, the relative vehicle of the two contour corresponding point in high beam light source center also is symmetrical.Referring to Figure of description, the range finding emission sensor is fixedly mounted on above the detector photometry screen center, launching centre point shields the central point line perpendicular to surface level with photometry, two central vertical differences in height are h, central ray shields light receiving surface perpendicular to photometry, place receiving sensor in make progress distance h place symmetry of high beam light source central vertical, as place the signal reflex body, then receiving sensor also can be fixed on the photometry screen, when high beam detects, by about the detection high beam irradiation position and drift angle, the left and right sides, and between the two sensors distance or emission sensor and signal reflex body between distance, can accurately calculate about photometry screen center and the high beam center and the left-right deviation distance, the computer control photometry is shielded up and down and the move left and right respective distance, make high beam center and the photometry screen line of centres shield light receiving surface perpendicular to photometry, at this moment, the corresponding centering with the signal reflex body of corresponding centering in two sensors center or transmitter is by measuring the vertical range L of contour h symmetric points of two high beam light source central vertical and detector photometry screen
3, L
4, move distance measuring equipment by increasing a detector track, can record symmetrical two high beam light source centre distance L on the relative orbit parallel direction
5, can obtain the relative error angle Q of the relative detector in two high beam light source centers then, by the L of actual detected
3, L
4, Q revises light intensity and the inclined to one side firing angle detected value of level respectively, thereby accurately detect the light intensity of headlamp and penetrate distance partially at 10 meters screen places.Illustrate by ultrasonic ranging and laser ranging respectively below.
1, ultrasonic ranging detects L
3, L
4, the Q method
Referring to Figure of description Fig. 1, when high beam light source center and photometry screen center, during 2 the vertical photometry screen of line planes, h is fixing given value, sequence number 1 is a high beam, and sequence number 2 is receiving sensor or signal reflectors, and sequence number 3 is photometry screens, sequence number 4 is emission sensor, and it is fixed on the photometry screen.Fig. 2 is high beam drift angle figure, and the A point is receiving sensor or signal reflex body center, and the B point is the emission sensor center, establishes left high beam aforesaid downward angle δ
1, right avertence angle β
1, two sensors or emission sensor and the range finding of signal reflex body are from being L
1
1.1 when detecting headlamp, as the β that has surveyed left high beam with full-automatic headlamp aligner
1, δ
1After light intensity, measure L
1, as shown in Figure 2.
Z
1＝x
1×tgδ
1 y
1＝x
1×tgβ
1 L
1 2＝x
1 2+y
1 2+z
1 2
L
1＝x
11+tg
2β
1+tg
2δ
1 x
1＝L
1/1+tg
2β
1+tg
2δ
1
Z
1＝L
1×tgδ
1/ 1+tg
2β
1+tg
2δ
1
Y
1＝L
1×tgβ
1/ 1+tg
2β
1+tg
2δ
1
Computer controlled automatic photometry screen level is moved to the left y
1, Z moves up
1, the B point moves to B
1Point, the also corresponding centering of top sensor, the high beam center and the photometry screen line of centres shield perpendicular to photometry.Measuring distance AB again
1Can get L
3
1.2, measure L referring to Figure of description Fig. 2 and Fig. 3
3After, as zero-bit, can on the track roller axle, load onto a resistance distance measuring equipment with this state detector position in orbit.As the light intensity of having surveyed right distance light and irradiation position δ
2, β
2And the distance L between two sensors distance or emission sensor and the signal reflex body
2, can get:
Z
2＝x
2×tgδ
2 y
2＝x
2×tgβ
2 L
2 2＝x
2 2+y
2 2+z
2 2
L
2＝x
21+tg
2β
2+tg
2δ
2 x
2＝L
2/1+tg
2β
2+tg
2δ
2
Z
2＝L
2×tgδ
2/ 1+tg
2β
2+tg
2δ
2
y
2＝L
2×tgβ
2/ 1+tg
2β
2+tg
2δ
2
Computer controlled automatic photometry screen moves horizontally y
2, vertical moving Z
2, high beam center and the photometry screen line of centres is shielded perpendicular to photometry, also corresponding centering of top sensor and range finding can get L
4
Poor by the track displacement after the high beam centering of the measurement left and right sides, can obtain the symmetrical two high beam lines of centres in the distance L that is parallel on the orbital direction
5
1.3 the correction of light intensity and headlamp (comprising distance light and dipped beam) irradiation position
The actual light intensity I of left side high beam
3=I
1* L
3 2/ L
2(1)
L-regulation detects apart from mm, and the high beam detector is 3000mm usually, and far and near optical detector is 1000mm.
I
1-detect the left high beam light intensity cd that distance L is calculated in accordance with regulations
The actual light intensity I of right high beam
4=I
2* L
4 2/ L
2(2)
I
2-detect the right high beam light intensity cd that distance L is calculated in accordance with regulations
Perhaps directly calculate actual light intensity according to survey illumination and distance.
I
3＝E
1×L
3 2×10
-6 I
4＝E
2×L
4 2×10
-6
E
1, E
2-be respectively left and right high beam to survey illumination Lx
Be parallel to the detector track with the left-right symmetric high beam line of centres and shield relative centering with the detector photometry as headlamp or vehicle, with and can get headlamp or the relative detector misalignment angle of vehicle tgQ=|L
3-L
4|/L
5
Q＝arctg(|L
3-L
4|/L
5) ……(3)
The level angle correction can be by comparing L
3With L
4Size judge increase and decrease, work as L
3＞L
4The time, then distance light and dipped beam are surveyed the left avertence angle and should be deducted Q, and the right avertence angle then adds Q.Work as L
3＜L
4The time, then distance light and dipped beam are surveyed the left avertence angle and should be added Q, and the right avertence angle then deducts Q.Upper and lower inclined to one side firing angle is constant.
Obtain the inclined to one side firing angle degree of left and right sides headlamp level accurately, can be converted into 10m exactly apart from penetrating distance partially on the screen.Determine sign as stated above.
L
A left side=10000tg (β
1± Q) L
Right=10000tg (β
2± Q)
R
A left side=10000tg (λ
1± Q) R
Right=10000tg (λ
2± Q)
L
A left side, L
Right-be respectively the level of left and right sides high beam on 10 meters screens to penetrate apart from mm partially
R
A left side, R
Right-be respectively the level of left and right sides dipped headlights on 10 meters screens to penetrate apart from mm partially.
λ
1, λ
2-be respectively the inclined to one side firing angle degree of left and right sides dipped headlights institute survey level
2, laser ranging detects L
3, L
4, the Q method
If the employing laser ranging can be fixed on the photometry screen transmitting and receiving sensor, the geometric position that its emission sensor is installed requires the same with the ultrasonic emitting sensor.
2.1 in the time of above light beam impinges upon high beam, can't accepting reflected light on the curved surface, detect β at left distance light
1And δ
1After, facing to signal reflex body of absorption on the light beam point of irradiation on the pilothouse, measuring vertical distance L
6, referring to Fig. 2, y
1=L
6* tg β
1, Z
1=L
6* tg δ
1, the photometry screen moves horizontally y
1With vertical moving Z
1, the movable signal reflecting body is at point of irradiation position measurement L
3, can measure the L of right high beam as stated above
4, can record L simultaneously
5, revise by 1.3.
2.2 be easy to operate, also can on high beam light source center, adsorb the reflecting surface that area is bigger in vertical height h place, be convenient to measure when the high beam irradiating angle detects vertical range.
Description of drawings
Projection when Fig. 1 shields center and high beam light source center for photometry on the vertical plane.Fig. 2 is that high beam drift angle and range finding are from space diagram.Projection when Fig. 3 is photometry screen center and high beam light source center on the surface level.The implication front of each symbol all illustrates.
Embodiment
Common headlamp detection is from left to right, and four lamp systems regulation should be installed side by side, and being loaded on a pair of of the outside is far and near light twin-beam lamp, and being loaded on a pair of of inboard is distance light single beam lamp.In order to increase L
5Improve accuracy of detection, preferably distance measuring sensor or signal reflex body are placed on relevant position, top, twin-beam lamp center, for passenger car, normally be adsorbed on from top to bottom above the high beam, for lorry, normally cantilever is adsorbed on above the high beam.The absolute error of range finding is little to the detection error of light intensity, the relative 1000mm distance error of error 10mm only is 1%, but the range finding relative error on both sides is then bigger to the angle error effect, so, as long as guarantee that distance measuring sensor or signal reflex body are on two supercentral symmetrical positions of high beam, usually range estimation is placed and can be guaranteed that relative error is about about 2mm, has very high accuracy of detection fast.
For improving the detection efficiency on the detection line, can adsorb the signal reflex body before perhaps detecting by entrusting the censorship person who detects unit before detection, to finish the symmetric points of placing sensor earlier, detect as four lamp systems and also can cover in two single high beams in advance.
The detection method of high beam and detector relative position and correction have and detect advantages such as accurate, simple, quick, that price is low, have improved the accuracy of detection and the repeatability of headlamp widely, also help headlamp and accurately adjust.
Claims (3)
1, the detection method and the correction of high beam and detector relative position, be by detecting the relative position of the relative detector of vehicle, thereby accurately detect the light intensity and the irradiation position of headlamp, it is characterized in that, the present invention increases on existing detector function and uses technology such as existing ultrasound wave or laser ranging, is parallel to the detector track as headlamp or the relative centering with detector of vehicle position with the left-right symmetric high beam light source line of centres; The range finding emission sensor is fixedly mounted on above the detector photometry screen center, launching centre point shields the central point line perpendicular to surface level with photometry, two central vertical differences in height are h, central ray shields light receiving surface perpendicular to photometry, place receiving sensor in make progress distance h place symmetry of high beam light source central vertical, as place the signal reflex body, then receiving sensor also can be fixed on the photometry screen; When high beam detects, by about the detection high beam irradiation position and drift angle, the left and right sides, and the distance between distance or emission sensor and the signal reflex body between the two sensors, can accurately calculate photometry screen center and high beam center about and the left-right deviation distance; The computer control photometry is shielded up and down and the move left and right respective distance, make high beam center and the photometry screen line of centres shield light receiving surface perpendicular to photometry, at this moment, the corresponding centering with the signal reflex body of corresponding centering in two sensors center or transmitter is by measuring the vertical range L of contour h symmetric points of two high beam light source central vertical and detector photometry screen
3, L
4, move distance measuring equipment by increasing a detector track, can record symmetrical two high beam light source centre distance L on the relative orbit parallel direction
5, can obtain the relative error angle Q of the relative detector in two high beam light source centers then; L by actual detected
3, L
4, Q revises light intensity and the inclined to one side firing angle detected value of level respectively, thereby accurately detect the light intensity of headlamp and penetrate distance partially at 10 meters screen places.
2, according to the detection method and the correction of described high beam of claim 1 and detector relative position, it is characterized in that, light intensity be modified to the actual light intensity I of left high beam
3=I
1* L
3 2/ L
2, the actual light intensity I of right high beam
4=I
2* L
4 2/ L
2, perhaps directly calculate actual light intensity, I according to survey illumination and distance
3=E
1* L
3 2* 10
-6, I
4=E
2* L
4 2* 10
-6
According to the detection method and the correction of described high beam of claim 1 and detector relative position, it is characterized in that 3, the level angle correction can be by comparing L
3With L
4Size judge increase and decrease, work as L
3＞L
4The time, then distance light and dipped beam are surveyed the left avertence angle and should be deducted Q, and the right avertence angle then adds Q, works as L
3＜L
4The time, then distance light and dipped beam are surveyed the left avertence angle and should be added Q, and the right avertence angle then deducts Q, is converted into 10m apart from penetrating distance, left high beam L partially on the screen
A left side=10000tg (β
1± Q), right high beam L
Right=10000tg (β
2± Q), light modulation R in the vicinity
A left side=10000tg (λ
1± Q), right dipped headlights R
Right=10000tg (λ
2+ Q).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410049436 CN1584538A (en) | 2004-06-06 | 2004-06-06 | Detection and correction for distancing light and detector relative position |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410049436 CN1584538A (en) | 2004-06-06 | 2004-06-06 | Detection and correction for distancing light and detector relative position |
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| Publication Number | Publication Date |
|---|---|
| CN1584538A true CN1584538A (en) | 2005-02-23 |
Family
ID=34602157
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410049436 Pending CN1584538A (en) | 2004-06-06 | 2004-06-06 | Detection and correction for distancing light and detector relative position |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100439856C (en) * | 2007-02-02 | 2008-12-03 | 吉林大学 | Non-contact type hand-driven automobile body left-right symmetric point height difference detector |
| CN100453996C (en) * | 2005-07-14 | 2009-01-21 | 吴明 | Method for detecting light intensity of main-beam light by non main light axle illuminancy |
| CN100460847C (en) * | 2006-03-23 | 2009-02-11 | 沈阳理工大学 | Automobile body oscillating angle automatic detecting device and automatic detecting method |
| CN102323044A (en) * | 2011-08-15 | 2012-01-18 | 天津大学内燃机研究所 | Motor vehicle headlamp luminous intensity distribution property self-adaption detection method based on camera method |
| CN107505119A (en) * | 2017-08-24 | 2017-12-22 | 复旦大学 | Navigate by water intensity of illumination distribution rapid detection system and detection method |
| CN107685839A (en) * | 2017-08-24 | 2018-02-13 | 复旦大学 | Ship navigation lamp installation accuracy method of adjustment |
| CN108195569A (en) * | 2017-12-08 | 2018-06-22 | 杭州浙大三色仪器有限公司 | Upper beam luminance detection method |
| CN108225787A (en) * | 2016-12-22 | 2018-06-29 | 上海汽车集团股份有限公司 | Vehicle alignment test method, control method, control device and testing stand |
-
2004
- 2004-06-06 CN CN 200410049436 patent/CN1584538A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100453996C (en) * | 2005-07-14 | 2009-01-21 | 吴明 | Method for detecting light intensity of main-beam light by non main light axle illuminancy |
| CN100460847C (en) * | 2006-03-23 | 2009-02-11 | 沈阳理工大学 | Automobile body oscillating angle automatic detecting device and automatic detecting method |
| CN100439856C (en) * | 2007-02-02 | 2008-12-03 | 吉林大学 | Non-contact type hand-driven automobile body left-right symmetric point height difference detector |
| CN102323044A (en) * | 2011-08-15 | 2012-01-18 | 天津大学内燃机研究所 | Motor vehicle headlamp luminous intensity distribution property self-adaption detection method based on camera method |
| CN108225787A (en) * | 2016-12-22 | 2018-06-29 | 上海汽车集团股份有限公司 | Vehicle alignment test method, control method, control device and testing stand |
| CN107505119A (en) * | 2017-08-24 | 2017-12-22 | 复旦大学 | Navigate by water intensity of illumination distribution rapid detection system and detection method |
| CN107685839A (en) * | 2017-08-24 | 2018-02-13 | 复旦大学 | Ship navigation lamp installation accuracy method of adjustment |
| CN107505119B (en) * | 2017-08-24 | 2019-11-12 | 复旦大学 | Navigate by water intensity of illumination distribution rapid detection system and detection method |
| CN108195569A (en) * | 2017-12-08 | 2018-06-22 | 杭州浙大三色仪器有限公司 | Upper beam luminance detection method |
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