摘要:
A method for validating an illumination-range test value of a light cone of at least one headlight of a vehicle. The method includes reading in a reflection intensity of a point on at least one road marking illuminated by the light cone; generating a reflection intensity model for the road marking, based on the obtained reflection intensity and a particular distance of the point from the vehicle, the reflection intensity model being designed to assign different reflection intensities to different positions on the road marking in front of the vehicle; determining an illumination-range plausibility value, at which, according to the reflection intensity model, a reflection intensity is reached, which corresponds to a reflection-intensity threshold value; and comparing the illumination-range plausibility value to the illumination-range test value, to validate the illumination-range test value, if the illumination-range plausibility value is inside a tolerance range around the illumination-range test value.
摘要:
Comprises the following phases: in first phase a vehicle (1) is facing an obstacle (4), screen or wall defining a distance, in second phase is determined the type of headlamp or lighting projector and its space position in relation to the obstacle, screen or wall, automated or hand operated, in third phase the headlamp or lighting projector of the vehicle is turn on and its beam (3) is projected in the obstacle, screen or wall, defining a real drawing (5) of the beam, in fourth phase, according to the space position, the distance to the wall, screen or obstacle and the type of headlamp or lighting projector a processor defines a theoretical beam, and in fifth phase a first artificial viewer (10) takes data of the real drawing and transfers them to the processor which compares them with those of the theoretical drawing.
摘要:
An optical axis of a headlight of a vehicle is adjusted by picturing an illuminating pattern of the headlight to appear on a screen which is disposed in front of the vehicle. A position of a center of gravity of a region above a predetermined illuminance in the illuminating pattern is obtained. A position of a stepped region in which a stepped portion of a light/dark border line of the illuminating pattern is present is obtained. A position of a point of inflection, in the stepped region, of an iso-illuminance curve having a predetermined rate of illuminance relative to an illuminance in the center of gravity is measured. The optical axis is adjusted based on this point of inflection.
摘要:
An illuminating pattern to appear on a first screen which is disposed in front of a headlight is pictured by a camera. A light-shielding panel is disposed on substantially the same plane as the first screen. A pin hole is formed in the light-shielding panel. The light to penetrate through the pin hole is illuminated via a mirror on a second screen which is on a surface behind the light-shielding panel. On the second screen there is formed an imaginary light source image which is to be formed on a reflecting light of the headlight. This image is pictured by the camera together with an illuminating pattern on the first screen. From the position of the imaginary light source image the actual position of the headlight is located, and the position of an acceptable range, within which a reference measuring point inside the illuminating pattern falls, is corrected depending on the position of the headlight so that the reference measuring point may fall within the acceptable range. Since the shape of the imaginary light source image varies with the orientation of the optical axis, the optical axis may also be adjusted such that the imaginary light source image becomes a normal shape.
摘要:
A headlamp testing method of the invention involves the steps of applying the low beam of the headlamp onto a screen, determining the position of the geometrical center of a closed area of illuminance higher than a predetermined level, determining the position of a cut off line cross point from the position of the geometrical center and a predetermined amount of offset, and determining a presumption line cut off line from the cut off line cross point. The presumption line thus determined is displayed together with a mark which indicates the within which the cross point should fall, and the headlamp beam is judged as being acceptable when the cross point is located within this range.
摘要:
A method of examining the state of alignment of headlamp beam axis has the following steps: taking up by a TV camera the image of the light distribution pattern of a headlamp beam on a screen; specifying a closed curved area of illumination intensities higher than a predetermined level in the taken-up image of the light distribution pattern; determining the position of the geometrical center of the specified closed curved area and displaying the position of the geometrical center on a monitor TV; measuring the area of the specified closed curved area; comparing the measured actual area of the closed curved area with a command area; adjusting the quantity of light received by the TV camera in accordance with the result of the comparison until the measured actual area of the closed curved area becomes equal to the command area; and displaying, on a monitor TV, a pattern representing the allowable range and a mark representing the position of the beam axis. When the marks falls within the allowable range, it is judged that the state of alignment of the beam axis is acceptable.
摘要:
Disclosed is a method for calibrating a light field generating device, which has a display unit with pixels for generating light and a lens field unit with optical lenses for deflecting the light generated by the display unit, and a control unit for controlling the display unit, each lens of the lens field unit being assigned a plurality of pixels of the display unit. Also disclosed are a light field generating device based on the above method and an illumination device having the disclosed light field generation device.
摘要:
Disclosed is a method of automatically adjusting the leveling of a pixel light headlamp for a vehicle, which may automatically adjust the leveling of a headlamp that is configured for implementing a pixel light using a DMD optical system.
摘要:
A vehicle headlamp aiming system includes a displaceable aiming surface and an imaging system. The imaging system includes an indexing aim box having at least one imager oriented to capture images of a headlamp and/or one or more vehicle features adjacent to the headlamp and at least one fixed imager oriented to capture one images of the displaceable aiming surface to determine a headlamp cutoff height. The displaceable aiming surface is configured to selectively displace to allow passage of the vehicle. The indexing aim box is configured to translate between the headlamp and another headlamp. One or more computing devices are configured to perform methods for headlamp aim correction using the described system. The methods include providing image inputs from the imaging system and calculating therefrom an aim correction of the headlamps.