Steel bridge deck pavement system health monitoring method and device

The invention relates to the technical field of bridge health monitoring, in particular to a steel bridge deck pavement system health monitoring method and device.In the method, the characteristics that ultrasonic guided waves can be propagated in a long distance in waveguide structures such as a plate-shaped structure, energy loss is small, and the ultrasonic guided waves are sensitive to tiny damage are fully utilized; a plurality of ultrasonic guided wave sensors are embedded in a steel bridge deck pavement to form an ultrasonic guided wave rectangular sensor array, each ultrasonic guided wave sensor can serve as a transmitting sensor and a receiving sensor, and the ultrasonic guided wave sensors are excited and controlled to generate ultrasonic guided waves; a plurality of sensors in the automatic switching ultrasonic guided wave rectangular sensor array generate signals, the defects are accurately positioned through a combined positioning imaging technology based on an ultrasonic phase control focusing t