ULTRASONIC WAVE TRANSMITTING AND RECEIVING METHOD

摘要

PURPOSE:To acquire accurately a reflected wave signal right after transmission and project clearly an image right under a body surface by constituting several array type ultrasonic probes at a center part as vibrators dedicated invariably to reception. CONSTITUTION:Receiving circuits 201 and 202 connected to center vibrators TD4 and TD5 acquire reflected wave signals arriving right after transmission without missing. Only signals obtained after a saturated state is recovered after transmission are used for transmitting/receiving circuits 101-103, and 106-108. The vibrators at the center part are dedicated to reception, and then only reflected waves from a place corresponding to sound ray on a display screen are collected at short distance, obtaining a natural image.