Short-Range Distance Measurements based on a Single Ultrasonic Transceiver
Sprache des Vortragstitels:
Campeon Innovation Week 2019, Infineon
Sprache des Tagungstitel:
Capacitive micromachined ultrasonic transducers (CMUTs) enable the design of small and low-cost short-range distance sensors, which measure the time-of-flight (TOF), based on the transmission of frequency-modulated signals, and perform pulse compression on the received echo. Due to high update rates, pulsed wave methods are best suited for rapidly changing environments. However, for single CMUT transceiver designs, the lower limit of the detection range is constrained by the transmit pulse width and membrane ringing. This contribution describes a method for optimizing the transmit pulse shape and partly removing the ringing to reduce the lower detection range limit down to 3cm.