Novel method for inverting bridge bearing capacity by ground-based radar
A technology of ground-based radar and bearing capacity, which is applied to static and dynamic load status and deflection changes, bearing capacity inversion, in the field of ground-based radar measurement of bridge vibration, to reduce the cost of manpower and material resources, convenient, simple and fast measurement, and improve detection accuracy and efficiency Effect
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[0061]A method for ground-based radar inversion of bridge bearing capacity, comprising the following steps:
[0062] 1) Place a ground-based radar under the bridge to record the height and elevation angle of the radar transmitter, and the distance between the radar transmitter and the bridge; set up cameras at both ends of the bridge to record the passing time of vehicles or trains;
[0063] 2) Use ground-based radar to scan and monitor the bridge, and combine frequency-modulated continuous wave (FMCW) technology and interferometry technology to measure the strain of the bridge at any point in the monitoring area at any time;
[0064] where the chirp continuous wave is expressed as:
[0065] (1)
[0066] In the formula, is the chirp frequency, is the signal carrier frequency, is a rectangular window function ,in is the pulse width.
[0067] Ground-based radars use chirp continuous wave technology to improve range resolution. The frequency difference between the...
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