Method for measuring vertical section of road surface
A measurement method and technology of longitudinal section, applied in the direction of measuring device, line-of-sight measurement, measuring distance, etc., can solve the problems of measurement error, road maintenance engineering error, etc., achieve simple measurement process, accurate drawing of longitudinal section curve, and eliminate measurement error Effect
Active Publication Date: 2011-01-12
ROADMAINT CO LTD
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Problems solved by technology
[0005] In view of this, the present invention is to provide a method for measuring the profile of the road surface to solve the problem that there are errors in the measurement during the detection process of the profile of the road surface of the above-mentioned curved road surface, which leads to errors in the road maintenance project in the later stage
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[0025] In order to clearly illustrate the solutions in the present invention, preferred embodiments are given below and detailed descriptions are given in conjunction with the accompanying drawings.
[0026] see figure 1 , the method of the present invention comprises the following steps:
[0027] Step 1: During the curve measurement process, the roll angle γ of the vehicle body tilt is obtained through the attitude determination and positioning device of the measurement vehicle.
[0028] When the measuring vehicle carrying the attitude positioning device and the laser distance measuring device is driving on a curved road section, the lateral acceleration will make the chassis plane of the testing vehicle and the horizontal plane form a roll angle (γ). The roll angle can be measured through the gyroscope in the attitude determination and positioning device, and a horizontal benchmark distance measurement reference plane can be obtained through angle correction, see figure 2...
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The invention discloses a method for measuring vertical section of a road surface to obtain a rolling angle between a vehicle body and the horizontal surface measured by a posture locator and to obtain distance measured by a laser distance measurer. The method comprises the following steps: obtaining the centrifugal acceleration of a vehicle body measured by a posture locator; obtaining the transverse gradient of the road surface according to the rolling angle, centrifugal acceleration of the vehicle body and the horizontal acceleration of the vehicle body; obtaining the distance between the road surface and the vehicle body according to the transverse gradient, the distance measured by the laser distance measurer and the rolling angle between the vehicle body and the horizontal surface; and obtaining the vertical section curve of the road surface through the distance measured by the laser measurer. The invention has simple measuring process through a distance signal of the laser measurer and an angel signal of the posture locator with little computation workload, draws the vertical section curve accurately, eliminates the measuring error, solves the problems that the high gradient of road surface curve can not be dynamically and rapidly measured and the rapidly-detected data of the road surface curve are inaccurate caused thereby, and provides accurate reference for road maintenance in later period.
Description
technical field [0001] The invention relates to the technical field of highway maintenance measurement, in particular to a method for measuring the profile of a road surface. Background technique [0002] Before maintaining the road, it is necessary to measure the profile of the road surface to obtain the International Roughness Index (International Roughness Index), which is an important basis for road quality evaluation, road user cost prediction and road maintenance investment benefit analysis one. In order to obtain an accurate international roughness index IRI, a high-precision pavement profile must be measured first. The pavement profile is, in the forward direction of the road, the pavement surface contour line composed of points with equal intervals of 1-50cm and continuously distributed. [0003] Until the 1990s, before laser technology was widely used in the detection of road surface roughness, the profile of the road surface could only be measured with precision...
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IPC IPC(8): G01C7/02G01C9/00G01C3/00G01P15/00
Inventor 潘玉利
Owner ROADMAINT CO LTD