(1) Operating frequency.
Depends on the *** vibration frequency of the piezoelectric wafer. When the frequency of the AC voltage on both sides of the ultrasonic sensor and the wafer's *** vibration frequency is equal, the output energy is the largest, and the sensitivity is also the highest.
(2) operating temperature.
The Curie point of piezoelectric materials is generally high. Diagnostic ultrasound probes use less power, so the operating temperature is lower, so they can work for a long time without failure. However, ultrasound probes for medical use have higher temperatures, so they require separate refrigeration equipment.
(3) Sensitivity.
Mainly depends on the piezoelectric wafer itself. High electromechanical coupling coefficient, high sensitivity; vice versa, low sensitivity.