Bridge inhaul cable group cable force synchronous monitoring method and system based on microwave radar
A microwave radar and bridge technology, applied in radio wave measurement systems, force/torque/power measuring instruments, radio wave reflection/re-radiation, etc., can solve problems such as error-prone, micro-motion observation signal aliasing, and low efficiency , to achieve the effect of non-contact monitoring
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[0067] Taking a cable-stayed bridge cable group in a certain place as an example to illustrate the specific implementation process of the present invention. The stay cables of this cable-stayed bridge adopt 1860MPa steel strand stay cables, and 36 stay cables of different lengths are arranged in the whole bridge, and the feasibility of the present invention is verified by monitoring 8 stay cables on one side of the span of the cable-stay bridge .
[0068] Step 1: The microwave radar equipment irradiates the cable group to be observed at a certain pitch angle, collects the orthogonal I / Q dual-channel zero-IF signal of each distance unit, and samples the orthogonal I / Q dual-channel zero-IF signal, as shown in Figure 6 (a) and (b) in the figure show the sampling signal of a certain distance unit. By comparing the phases of the sampling signals of each distance unit, the phase difference and deformation of each distance unit can be obtained, as shown in Figure 7 In (a) and (b) ...
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