Research Progress of Capacitive Ultrasonic Transducers in the Medical Field 1

The capacitive ultrasonic transducer MOC3023 is a commonly used ultrasonic imaging probe widely applied in the medical field. It converts electrical energy into mechanical energy through the capacitive effect, thereby generating ultrasonic waves and transforming received ultrasonic waves back into electrical energy to achieve ultrasonic imaging. The following sections will provide a detailed elaboration on the research progress of capacitive ultrasonic transducers in the medical field. diode

1. Basic Principles of Capacitive Ultrasonic Transducers

The capacitive ultrasonic transducer converts electrical energy into mechanical energy through changes in the electric field. Its fundamental principle is as follows:

1. Emission process: In a capacitive ultrasonic transducer, a high-frequency alternating voltage is applied, causing changes in the electric field between the electrodes. These changes in the electric field lead to slight dimensional variations in the piezoelectric material, thereby generating mechanical waves (ultrasonic waves).

2. Reception process: When ultrasonic waves propagate to the object being inspected and reflect back, they cause slight dimensional changes in the piezoelectric material within the transducer. These changes lead to variations in the electric field between the electrodes, thereby generating voltage signals on the electrodes.

Based on the above principles, capacitive ultrasonic transducers can achieve the transmission and reception of ultrasonic waves, thereby enabling ultrasonic imaging. diode