Ultrasonic multi-point roadway surface displacement monitoring device

The invention relates to an ultrasonic multi-point roadway surface displacement monitoring device, which comprises a split type receiving transducer R and a transmitting transducer T which are arranged at the left side of a roadway, two split type transmitting transducers T and a receiving and transmitting integrated transducer RT which are arranged at the middle top of the roadway, and two split type receiving transducers R which are arranged at the right side of the roadway, thereby forming an upper triangular left side measuring line, a center line top bottom measuring line, an upper triangular right side measuring line and an upper triangular horizontal measuring line. Each split type receiving/transmitting transducer or integrated transducer adopts a four-core cable to be laid to a monitoring host along the roadway, and the monitoring host is connected with a remote upper computer through an RS485 or a wireless Zigbee. An RT matching latch module, an ultrasonic ranging module, a display alarm module, a data storage and wireless acquisition module, a remote data transmission module and a power supply module which are connected with the ultrasonic receiving/transmitting transducers are arranged inside the monitoring host. The ultrasonic multi-point roadway surface displacement monitoring device utilizes the ultrasonic ranging principle, and is stable in monitoring.