Method and system for measuring vehicle-mounted road profile
A measurement method, a vehicle-mounted technology, applied in the direction of measurement devices, section drawing, surveying and navigation, etc., can solve the problems of inability to cover all frequency ranges, inability to accurately obtain road surface fluctuations, inaccurate acceleration measurement, etc., to increase reliability, The effect of measuring accurately without loss of information
Inactive Publication Date: 2010-06-02
TSINGHUA UNIV
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Problems solved by technology
The current road surface measurement products only use one accelerometer to measure the vibration, and one accelerometer usually only measures the acceleration information in one frequency range more accurately, and cannot cover all frequency ranges from 0 to 1KHz, so the acceleration measurement is inaccurate problem, so that the real ups and downs of the road surface cannot be accurately obtained
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[0018] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.
[0019] Two accelerometers that the present invention adopts are respectively a quartz accelerometer and an ICP (ceramic shear piezoelectric type) accelerometer, utilize laser displacement sensor, quartz accelerometer and three sensors of ICP accelerometer to measure, and its steps are as follows:
[0020] (1) First, calibrate the two accelerometers and the laser displacement sensor. The purpose of the calibration is to obtain the proportional parameter between the sensor and the actual measured value. After the calibration is completed, the obtained data will be input into the data processing program in the vehicle-mounted computer. middle;
[0021] (2) The data signals measured by the three sensors are collected. When the system starts to work, the control module in the vehicle-mounted computer opens the three sensors to collect data on the road surf...
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The invention relates to a method and a system for measuring a vehicle-mounted road profile. The method comprises the following steps of: (1) calibrating two accelerometers and laser displacement sensors, and inputting obtained scale parameters of the sensors and actual measurement values into a data processing program of a vehicle-mounted computer; (2) acquiring the data measured by three sensors, acquiring the data of a road surface by starting the three sensors through a control module in the vehicle-mounted computer, and inputting the acquired data information into the vehicle-mounted computer; and (3) processing the data input by a data acquisition unit through the vehicle-mounted computer, and mutually combining the data information measured by the three sensor through a software processing module in the vehicle-mounted computer to form shape data of the profile of the road surface. The method and the system of the invention adopt the cooperation of different accelerometers and laser displacement sensors in two frequency-response areas to provide basic data for the real restoration of the longitudinal displacement of a detection beam, and have the characteristics of accurate measurement and no information lost. The method of the invention can be widely applied in various road measuring systems.
Description
technical field [0001] The invention relates to a road surface measurement method, in particular to a vehicle-mounted road profile measurement method for non-contact high-speed road profile shape measurement and a measurement system thereof. Background technique [0002] The vehicle-mounted pavement profile shape measurement system is mainly composed of an accelerometer and a laser displacement sensor. The laser displacement sensor is used to measure the precise distance from the detection beam to the road surface, and the accelerometer is used to measure the longitudinal acceleration signal of the detection beam. The longitudinal displacement of the detection beam itself is obtained after the quadratic integration, and the shape of the longitudinal section of the pavement is finally obtained after the two displacements are superimposed. Such as figure 1 As shown, A in the figure is the detection beam, and B is the measured road baseline. The measurement of the road type i...
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IPC IPC(8): G01C7/04
Inventor 连小珉杨殿阁韩毅
Owner TSINGHUA UNIV