Application of Ultrasonic Sensor in Inspection of Sunroof Glass in Automobile Manufacturing

Ultrasonic sensor is a sensor that can measure distance and position by sending and receiving ultrasonic waves. Since the sunroofs of automobiles are almost transparent, various sensors based on optical principles cannot measure. The ultrasonic sensor can send out ultrasonic waves and receive echoes from the glass surface. By combining the time and wave speed of the received echo, the distance of the object can be estimated. When the time constant measured by the non contact ultrasonic sensor is within the preset range, it means that the presence of glass is detected at the sunroof of the car; on the contrary, when the ultrasonic sensor does not receive an echo, it means that the presence of glass is not detected.

PIEZOHANNAS ultrasonic proximity sensors have many sub-series models, which are specially used to solve some very difficult problems. When is using this ultrasonic sensors, the detecting object can be any material, regardless of color. It can detect transparent, shiny, dark, opaque objects. Non-contact detection can be done from transparent glass bottles to black rubber tires. Moreover, the PIEZOHANNAS ultrasonic sensors can also be used in dusty and harsh environments without affecting accuracy and repeatability, which many other ultrasonic sensors cannot do it. The ultrasonic sensor for distance measurement can also achieve background suppression, that is, it can only detect targets within a set distance, and is not sensitive to background materials behind the detecting object. The ultrasonic sensors use a high-frequency carrier, and its operating frequency reaches 130 to 300KHz, which is much higher than the noise frequency in a typical industrial environment.