Description:
This utility model relates to an ultrasonic sensor in the field of flow measurement technology. It comprises a piezoelectric ceramic element, a second matching layer, and a first matching layer sequentially stacked along the direction of ultrasonic signal transmission, with the piezoelectric ceramic connected to the second matching layer. The design enables effective acoustic impedance matching between the coupled ultrasonic signals (through the first and second matching layers) and the gas medium. This significantly enhances ultrasonic energy transmission and coupling efficiency with the gas, thereby improving the detection sensitivity of the ultrasonic sensor in gaseous environments.
