A laser measuring instrument for pavement texture structure and structure depth

Abstract

The invention provides a laser measuring instrument for a road surface texture structure and structure depth. The laser measuring instrument includes a vari-focusing planar laser generator having a single transverse-mode structure, a plane array CCD for acquiring images, a microprocessor for realization of image processing, a rechargeable power supply, and an external packaging shell body provided with a vehicle-mounted mounting port; the planar laser generator and the plane array CCD are mounted on a same substrate plane vertical to a to-be-measured road surface, and the plane array CCD array, the planar laser generator and the to-be-measured road surface form a triangulation distance measurement relationship; the external packaging shell body is used for packaging the planar laser generator, the plane array CCD, the rechargeable power source, the microprocessor and the like, a detector unit provided with a laser emission window, an acquisition detection window, a charging interface, a control signal interface and a data output interface is formed, and the detector unit is also provided with a standard template; the standard template is used for correction and calibration of the detector unit. A texture cross section curve of the road surface can be transiently acquired in a full field mode by the laser measuring instrument, and the road surface texture structure condition and structure depth are visually, strictly and quantitatively characterized.

Description

technical field [0001] The invention belongs to the technical field of road surface condition detection devices, in particular to a laser measuring instrument for road surface texture structure and structure depth. Background technique [0002] Various industrial planes, platforms, especially road surfaces, have meso-submillimeter-millimeter-level elevation fluctuations, which need to display their cross-sectional structures vividly, accurately measure the structural depth, and calculate their roughness or unevenness to evaluate their surface physics. Performance, there are two types of pavement texture structure and structure depth measurement equipment included in the testing regulations at home and abroad; 1) The sand topping method is used to measure the pavement structure depth. Based on the determination of the standard sand grains, the measurement of the sand-dressing volume and the calculation of the structural depth, it has been used for road engineering acceptance ...

AI Technical Summary

Problems solved by technology

It is required that the sampling interval must be much smaller than the structure width (millimeter level), and the high-speed automatic acquisition requires that the acquisition frequency must be greater than 20K. It is better to use 64K to reach the submillimeter level, but the higher the acquisition frequency, the higher the price, reaching hundreds of thousands, and the elevation is collected point by point Statistically calculates the structure depth, but cannot display the structure of the mesoscopic section, cannot observe the rough distribution of the surface, and has poor anti-interference ability.

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