LED lamp concentration illumination device for pavement detection

Abstract

The invention relates to a roadway detection LED lamp spotlighting device which is provided with an inclined concave surface cavity lamp hanger that is hinged and installed on a fixed frame plate by an upper regulating support screw rod and a lower connecting bracket. The surface of an inner cavity of the lamp hanger is provided with a plurality of LED lamp rows by an aluminium base fixed plate, a cylindrical mirror having the adjustable front and rear positions as well as direction is arranged in front of each LED lamp row, and a bright belt is formed by focalizing the light beams emitted by all the LED lamp rows at the shooting position of a line-scan digital camera after the light beams pass through the cylindrical mirror having the adjustable direction. When the LED light source is adopted for lighting the line-scan digital camera in roadway detection, after an electric control system starts, the light which is emitted by a plurality of LED lamps and passes through the adjustable cylindrical mirror is focalized on the surface of the object to form a high-brightness belt. By regulating the number sequence, the focusing distance and the lighting angle of obliquity of the lamp rows, the device can meet the requirements of illumination with different brightness, thus adapting to the requirements of the installation structure of different illuminating systems in the roadway detection.

Description

technical field [0001] The invention belongs to the technical field of photoelectric applications, and relates to an auxiliary lighting device for road surface detection and photography, in particular to a road surface detection LED lamp spotlight lighting device. Background technique [0002] In the process of road surface detection, there are two ways to take digital images of objects. One is to use an area array camera to capture a specific area of ​​the object to obtain a two-dimensional image, and the other is to use a line array camera. A one-dimensional image is obtained by photographing a narrow band of an object. [0003] When shooting a relatively moving object, the exposure time is mainly determined by the speed of the object's movement. In the case of certain parameter values ​​such as aperture size, exposure time, shooting distance, photoelectric receiving chip sensitivity, and pixel size of the imaging system, in order to shoot objects with low brightness or o...

AI Technical Summary

Problems solved by technology

General lighting sources (including incandescent lamps, sodium lamps, mercury lamps...) have been seldom used so far due to their low luminous efficiency

As for the xenon lamp light source and the halogen lamp light source that are still used in road surface detection at present, due to the large heat generated when they emit light, it is easy to cause high temperature and heat generation of the light source, which greatly affects the service life of the concentrating system.

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