CN112082739A - HUD stray light environment simulation test device and test method - Google Patents
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Abstract
The invention discloses HUD stray light environment simulation test equipment which comprises an ambient light system, a stray light system and a rack system, wherein the ambient light system is a light source with adjustable brightness and color temperature; the stray light system comprises a moving guide rail and a multi-axis mechanical arm, a light source is mounted at the arm end of the multi-axis mechanical arm, the angle from the light source to the center of the IPcover opening is controlled through the multi-axis mechanical arm, and stray light detection is performed through angle scanning; the gantry system includes a gantry, a windshield, an eye box frame, and a HUD. A HUD stray light environment simulation test method is also disclosed. The invention discloses a HUD stray light environment simulation test device and a test method, which cover all stray light incident on a HUD and are detected by a full-automatic scanning type light source; the rack equipment is provided with eye box frames moving in the x, y and z directions to match different items; this stage apparatus can be pushed out of the room for stray light and other HUD tests.
Description
Technical Field
The invention relates to the technical field of HUD testing, in particular to HUD stray light environment simulation testing equipment and a testing method.
Background
An automobile windshield Head-Up Display (Head Up Display) can present information on the front windshield glass of an automobile, so that a driver can see instrument information only by lowering the Head, and the driving safety is ensured. Heads-up displays were first used on military aircraft. With the development of technology, the application of the head-up display in the automobile field is more and more extensive. When a typical windshield-type HUD (head-up display) is used in different environments, bright spots appear in the HUD imaging area due to sunlight focusing reflected by the surface of the dustproof plate and stray light caused by sunlight rays reflected back and forth between the LCD, the small reflector and the large reflector and then emitted to human eyes, and thus the use comfort of a driver is reduced. In order to avoid the above situation, it is necessary to perform a test using a related test device to verify the reliability of the analysis result, and to provide a support for the development of a product in the future so as to make the virtual image on the front windshield reach an ideal state.
In the stray light test in the prior art, a three-primary-color light source is utilized to simulate the movement track of the sun in one day in a translation and rotation combined mode, and a tester detects the movement track in an observation eye box frame by adjusting the position of the light source.
The conventional stray light testing equipment of the HUD cannot simultaneously test indoors and outdoors, and during indoor testing, a stray light source is irradiated under the control of a person and cannot move in a scanning manner to cover all incident angles of the sun, so that the stray light is missed in testing, the stray light problem of a product flows out, the stray light problem frequently occurs at a client, and the visual experience of a driver is influenced; the influence of ambient light on the HUD effect and the stray light cannot be simulated indoors, so that the influence on the recognition of the stray light is caused, some stray light can be recognized in a laboratory due to the brightness problem of the laboratory, and the stray light cannot be seen by human eyes outdoors, so that the stray light is not formed, and the time of a large amount of research and development personnel is wasted; different driving environment in the laboratory can not simulate at present, for example can not effectively simulate when stray light appears in sunny day, cloudy day, night street lamp etc. just so can't judge, the driver's vision experience condition when stray light appears. During outdoor testing, stray light tests depend on a real vehicle, before HUD loading, stray light tests can not be carried out outdoors, and a large amount of stray light problems are caused to flow out due to the fact that the stray light tests can not be detected in the truest environment.
The following technical problems exist in the prior art:
1, a light source of the stray light testing equipment cannot move in a scanning mode and cover all stray light angles, and the movement of the light source is operated by 1-2 persons;
2, the influence of the external environment on stray light identification cannot be simulated;
3. the indoor test bench cannot be pushed outdoors to perform HUD test;
4. no eye box frame or the eye box frame can not move.
Disclosure of Invention
The invention provides HUD stray light environment simulation test equipment and a test method, which solve the problem that substances to be treated in a resonant cavity cannot be stirred in the prior art.
The technical scheme of the invention is realized as follows:
a HUD stray light environment simulation test device comprises an environment light source system, a stray light source system and a rack system, wherein,
the environment light source system is a light source with adjustable brightness and color temperature, and the surrounding environment is controlled by adjusting the brightness and the color temperature;
the stray light source system comprises a motion guide rail, a stray light source and a multi-axis mechanical arm, a sliding block matched with the motion guide rail is arranged at the bottom of the multi-axis mechanical arm, the stray light source is installed at the arm end of the multi-axis mechanical arm, the angle from the stray light source to the center of the IPcover opening is controlled through the multi-axis mechanical arm, and stray light detection is carried out through angle scanning;
the rack system comprises a rack, windshield glass, an eye box frame and a HUD, wherein the eye box frame and the HUD are sequentially installed on the rack, and the windshield glass is installed above the HUD.
Further, the motion guide rail is semicircular.
Further, the eye box frames move in the x, y and z directions.
A testing method of HUD stray light environment simulation testing equipment comprises the following steps:
s1, determining the position of the stray light source,
the stray light source is simplified to two angles (theta,
) Theta is the height angle, which indicates the included angle between the light from the stray light source to the center of the IPcover opening of the HUD and the horizontal direction at the height and azimuth angle of the HUD
Representative of which direction of the HUD the stray light source is oriented, by the elevation angle theta and the azimuth angle theta
The control of the light source is realized;
coordinates (x, y, z, alpha, beta, gamma) of a light source of the multi-axis mechanical arm, wherein x, y and z are position coordinates of the light source in a Cartesian coordinate system, alpha, beta and gamma are rotation coordinates of the light source, and the light source is used for simulating all incidence angles of stray light, so that the motion envelope of the light source is simplified into a semicircle shape by matching the height angle theta and the azimuth angle theta
Covers stray light from all angles of the HUD;
s2, during scanning type measurement, N points are averaged on the envelope, and the space coordinate (r, theta) of each pointi,
) Through r, thetai,
After spatial localization, scanning and irradiating against the IPcover opening of the HUD by controlling the rotation angles (alpha, beta, gamma) of the light source;
s3, if the size of the light spot is larger than the IPcover opening, the light spot covers the whole opening;
s4, if the spot size is smaller than the IPcover opening, enabling the light source to face the IPcover opening for scanning irradiation, wherein the scanning range is the size of the IPcover opening;
s5, when scanning and irradiating the N points point by point, all incident angles of the stray light can be covered;
s6, when scanning measurement is carried out, the tester can judge the position of the eye box where the stray light appears according to the position of the human eyes in the eye box frame when the stray light is found.
A HUD stray light environment simulation test method, in step S1, coordinates of a multi-axis robot in a cartesian coordinate system are (x, y, z, α, β, γ), and are converted into coordinates (r, θ,
α，β，γ)，
z＝cosθi
after calculation, the position coordinates x, y and z are converted into r, theta,
the coordinates of the light source on the spherical envelope are thus (r, θ)i,
α，β，γ)，θiIs a height angle of the air conditioner,
is the azimuth angle and r is the spherical radius.
The invention has the beneficial effects that:
the invention discloses a HUD stray light environment simulation test device and a test method,
1. a full-automatic scanning type detection light source for covering all stray light incident on the HUD;
2. the rack equipment is provided with eye box frames moving in the x, y and z directions to match different items;
3. an environment simulation light source is arranged in a laboratory, and the influence of the external environment on stray light identification and HUD virtual images can be simulated;
4. a light source simulating sunlight, wherein the light source brightness is 0-200000 LUX;
5. this stage apparatus can be pushed out of the room for stray light and other HUD tests.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic diagram of a HUD stray light environment simulation test device according to an embodiment of the present invention;
FIG. 2 is a detailed schematic diagram of a HUD stray light environment simulation test device according to an embodiment of the present invention;
FIG. 3 is a schematic view of a spherical coordinate system;
FIG. 4 is a schematic diagram of a spherical envelope of a simulation stage of the HUD stray light environment according to an embodiment of the present invention;
FIG. 5 is a simplified envelope diagram of a simulation stage for the HUD stray light environment according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a spherical envelope and a simplified envelope of a simulation gantry for a HUD stray light environment according to an embodiment of the present invention;
FIG. 7 is a system flow diagram of the present invention.
In the figure, 1 — ambient light source system; 2-stray light source system; 3-a gantry system; 4-stray light source; 5-a multi-axis robotic arm; 6-a motion guide rail; 7-windshield glass; 8-eye box frame; 9-HUD; 10-a gantry.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1-2, the HUD stray light environmental simulation test equipment of the present invention comprises an ambient light source system, a stray light source system and a stage system, wherein,
the environment light source system is a light source with adjustable brightness and color temperature, and the surrounding environment is controlled by adjusting the brightness and the color temperature;
the stray light source system comprises a motion guide rail, a stray light source and a multi-axis mechanical arm, a sliding block matched with the motion guide rail is arranged at the bottom of the multi-axis mechanical arm, the stray light source is installed at the arm end of the multi-axis mechanical arm, the angle from the stray light source to the center of the IPcover opening is controlled through the multi-axis mechanical arm, and stray light detection is carried out through angle scanning;
the rack system comprises a rack, windshield glass, an eye box frame and a HUD, wherein the eye box frame and the HUD are sequentially installed on the rack, and the windshield glass is installed above the HUD.
Preferably, the movement guide is semicircular.
Preferably, the x, y and z directions of the eye box frame can be moved, and different items can be matched.
The testing principle of the HUD stray light environment simulation testing device comprises the following steps:
in this apparatus, the driving environment of the automobile can be controlled by an ambient light source system, and the ambient environment can be simulated by controlling the brightness and color temperature of the light source.
The simulation of external stray light accessible stray light source system realizes, gets into HUD's external light, can simplify to twoThe angle (theta) is such that,
) As shown in FIG. 3, θ is the height angle, which indicates the angle between the horizontal direction and the light from the stray light source to the center of ipcover opening of HUD, and the height and azimuth angle of HUD
Representative of the direction of the stray light source in the HUD, through the pair of elevation angle theta and azimuth angle theta
The control of the light source can be realized.
The stray light source system consists of a multi-axis mechanical arm, a stray light source simulating sunlight and a motion guide rail, wherein coordinates (x, y, z, alpha, beta and gamma) of the multi-axis mechanical arm light source are the position coordinates of the light source in a Cartesian coordinate system, and alpha, beta and gamma are the rotation coordinates of the light source.
The light source is designed to simulate all angles of incidence of stray light, so the motion envelope of the light source is reduced to a semi-circular shape, as shown in FIG. 4, by matching the elevation angle θ and the azimuth angle
Can cover stray light from all angles of the HUD.
The coordinate of the multi-axis manipulator in the cartesian coordinate system is (x, y, z, alpha, beta, gamma), and is converted into the coordinate (r, theta,
α, β, γ), as shown in figure 3,
z＝cosθi
after calculation, the position coordinates x, y and z are converted into r, theta,
the coordinates of the light source on the spherical envelope are thus (r, θ)i,
α，β，γ)，θiIs a height angle of the air conditioner,
is the azimuth angle, r is the spherical radius
In scanning measurement, N points can be averaged on the envelope, and the space coordinate (r, theta) of each pointi,
) Through r, thetai,
After space positioning, the light source is controlled to rotate angles (alpha, beta, gamma) to irradiate towards the IPcover opening of the HUD in a scanning mode, if the size of a light spot is larger than that of the IPcover opening, the light spot covers the whole opening, if the size of the light spot is smaller than that of the IPcover opening, the light source is irradiated towards the IPcover opening in a scanning mode, and the scanning range is the size of the IPcover opening. When the N points are scanned and irradiated point by point, all incident angles of stray light can be covered.
When the mechanical arm is not long enough or the envelope is too large, the envelope can be simplified as shown in fig. 5, and the spatial coordinate point is (r)u,θi,
α, β, γ), since the envelope is fixed, r for each coordinate point thereof is a fixed value,
as shown in FIG. 6, point A is a point on the spherical surface, point P is a point on the simplified envelope, and point P is the coordinate
z＝cosθi
Coordinates of point A
z＝cosθi
Although the radii of the two points are not the same, the height angle thetaiAnd azimuth angle
Similarly, the incident angle of the stray light is the same, so the light source illumination effect of the point a and the point P test stray light is the same, and therefore, when the mechanical arm is not enough, the envelope can be simplified.
In the case of scanning measurement, the envelope may be divided equally into N points, each point having a spatial coordinate (r)i,θi,
) Through ri,θi,
After space positioning, irradiating towards the IPcover opening of the HUD by controlling the rotation angle (alpha, beta, gamma) of the light source, if the size of the light spot is larger than that of the IPcover opening, covering the whole opening by the light spot, if the size of the light spot is smaller than that of the IPcover opening, scanning and irradiating the light source towards the IPcover opening, wherein the scanning range is the size of the IPcover opening. After one point scanning is finished, scanning irradiation is carried out point by point, and thus the stray light can be coveredThere is an angle of incidence.
When scanning detection is carried out, a tester can judge the position of the eye box where stray light appears according to the position of human eyes in the eye box frame when the stray light is found.
In addition, the stray light environment simulation system has a mode of retesting, when the stray light environment simulation system enters the retesting mode, as long as the time, the place and the automobile driving direction of the stray light are input, the stray light source (r, theta,
) Stray light can then be reproduced by controlling the light source rotation angles (α, β, γ) to scan the illumination against the IPcover opening of the HUD.
If the stray light automatic identification system is arranged, the system can automatically identify the stray light of which eye box and which part.
When needs are tested outdoors, rack system bottom is equipped with the pulley, can push away the rack system and carry out the test of stray light and other performances of HUD outdoors.
As shown in fig. 7, the present invention provides a HUD stray light environment simulation test system, in a processing system, when inputting environmental parameters, an environmental light source system can adjust the brightness and color temperature of an environmental light source to simulate an external environment; inputting the model of the HUD product, and controlling the coordinate of the mechanical arm by the processing system according to the size of the envelope and the size and the position of the IPcover opening of the HUD to enable the stray light source to carry out scanning type irradiation test; when stray light is reproduced, the product type, the time and the place of the stray light and the driving direction of the automobile are input into the processing system, so that the position of the light source can be accurately positioned, and the stray light is reproduced.
The stray light environment simulation bench can be used for indoor environment simulation and outdoor test. In indoor testing, different scenes can be simulated by adjusting the brightness and color temperature of ambient light, for example: on sunny days (ambient light illuminance 100000LUX, color temperature 5400K), cloudy days (ambient light illuminance 500LUX, color temperature 6500K-7000K) and the like, then scanning detection is carried out by controlling a stray light source of a stray light system, the HUD can be irradiated by the light source in all directions, stray light can be detected, and accurate positioning can be realized when stray light occurs, so that retesting is convenient; when outdoor testing is carried out, the rack part can be pushed outdoors to carry out testing, so that indoor and outdoor stray light testing and other performance tests can be carried out on the HUD before the HUD is loaded; the rack is provided with a movable eye box frame which is adaptive to different items, and the position of the eye box where stray light occurs can be judged when the stray light occurs.
This stray light environment simulation equipment can detect stray light indoor and outdoor, this equipment can simulate external environment during indoor test, and full-automatic simulation external all can shine the light on the HUD, detect stray light, when the stray light automatic identification system of cooperation, a inspector just can full-automatic simulation, the test, reappear stray light, during outdoor test, only need to push away the test bench outdoor and test, can simulate external environment and test stray light before the loading, great improvement stray light test accuracy, save test time, great reduction the test cost.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (5)
1. The utility model provides a HUD stray light environment simulation test equipment which characterized in that: comprising an ambient light source system, a stray light source system and a gantry system, wherein,
the environment light source system is a light source with adjustable brightness and color temperature, and the surrounding environment is controlled by adjusting the brightness and the color temperature;
the stray light source system comprises a motion guide rail, a stray light source and a multi-axis mechanical arm, a sliding block matched with the motion guide rail is arranged at the bottom of the multi-axis mechanical arm, the stray light source is installed at the arm end of the multi-axis mechanical arm, the angle from the stray light source to the center of the IPcover opening is controlled through the multi-axis mechanical arm, and stray light detection is carried out through angle scanning;
the rack system comprises a rack, windshield glass, an eye box frame and a HUD, wherein the eye box frame and the HUD are sequentially installed on the rack, and the windshield glass is installed above the HUD.
2. The HUD stray light environment simulation test device of claim 1, wherein: the motion guide rail is semicircular.
3. The HUD stray light environment simulation test device of claim 1, wherein: the eye box frame moves in the x, y and z directions.
4. A testing method of a HUD stray light environment simulation testing device according to any one of claims 1 to 3, comprising the steps of:
s1, determining the position of the stray light source,
the stray light source is simplified into two angles
Theta is the height angle, and represents the included angle between the light from the stray light source to the center of the IPcover opening of the HUD and the horizontal direction at the height and the azimuth angle of the HUD
Representative of which direction of the HUD the stray light source is oriented, by the elevation angle theta and the azimuth angle theta
The control of the light source is realized;
coordinates (x, y, z, alpha, beta, gamma) of a light source of the multi-axis mechanical arm, wherein x, y and z are position coordinates of the light source in a Cartesian coordinate system, alpha, beta and gamma are rotation coordinates of the light source, and the light source is used for simulating all incidence angles of stray light, so that the motion envelope of the light source is simplified into a semicircle shape by matching the height angle theta and the azimuth angle theta
Covers stray light from all angles of the HUD;
s2, during scanning type measurement, N points are averagely taken on the envelope, and the space coordinate of each point
Through r, thetai,
After spatial localization, scanning and irradiating against the IPcover opening of the HUD by controlling the rotation angles (alpha, beta, gamma) of the light source;
s3, if the size of the light spot is larger than the IPcover opening, the light spot covers the whole opening;
s4, if the spot size is smaller than the IPcover opening, enabling the light source to face the IPcover opening for scanning irradiation, wherein the scanning range is the size of the IPcover opening;
s5, when scanning and irradiating the N points point by point, all incident angles of the stray light can be covered;
s6, when scanning measurement is carried out, the tester can judge the position of the eye box where the stray light appears according to the position of the human eyes in the eye box frame when the stray light is found.
5. The HUD stray light environment simulation test method according to claim 4, wherein the test method comprises the following steps: in step S1, the coordinate of the multi-axis robot in the cartesian coordinate system is (x, y, z, α, β, γ), and the coordinate is converted into the coordinate of the spherical coordinate system
z＝cosθi
After calculation, the position coordinates x, y and z are converted into r, theta,
the coordinates of the light source on the spherical envelope are thus
θiIs a height angle of the air conditioner,
is the azimuth angle and r is the spherical radius.
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