Research on Filtering Algorithm of Bridge Vibration Signal Based on Millimeter Wave Radar

Bridges play a crucial role in transportation networks, but accidents due to bridge health issues pose serious threats to safety. Millimeter-wave radar, a non-contact detection technology, is increasingly used for monitoring bridge health. This paper proposes a PSO-VMD-SWT algorithm to optimize VMD parameters using PSO, filter radar echo signals with SWT, and analyze bridge vibration signals through phase detection. Experimental validation using millimeter-wave radar and accelerometers confirmed the algorithm's effectiveness in detecting bridge health.