Ultrasonic transceiver, ultrasonic flowmeter, ultrasonic flow velocimeter, ultrasonic densitometer, and manufacturing method

An ultrasonic transceiver, comprising:

• a piezoelectric body;
• a closed-top tubular metal case disposed on one face of the piezoelectric body;
• and
• an acoustic matching body disposed on a top outer wall of the closed-top tubular metal case,
• wherein the acoustic matching body includes:
• a top plate and a side wall,
• the top plate and the side wall defining an inner space;
• and
• a perpendicular partition wall adhering to the top plate and the top outer wall of the closed-top tubular metal case, thereby dividing a closed space,
• the closed space being formed by adhesion of an edge of the side wall, the edge being more distant from the top plate, to the top outer wall of the closed-top tubular metal case.

A method for manufacturing an ultrasonic transceiver,

• the ultrasonic transceiver including:
• a piezoelectric body;
• a closed-top tubular metal case disposed on one face of the piezoelectric body;
• and
• an acoustic matching body disposed on a top outer wall of the closed-top tubular metal case,
• wherein the acoustic matching body includes:
• a top plate, a bottom plate, and a side wall,
• the top plate, the bottom plate, and the side wall defining a closed space;
• a perpendicular partition wall formed substantially perpendicularly to the bottom plate and adhering to the top plate and the bottom plate, thereby dividing the closed space;
• and
• a horizontal partition wall formed substantially horizontally to the bottom plate and adhering to the side wall, thereby dividing the closed space,
• the method comprising the steps of:
• forming a pattern in a metal plate, the metal plate being one of a plurality of metal plates;
• laminating the metal plates in each of which the pattern is formed, and further laminating the top plate and the bottom plate on a laminate of the metal plates;
• joining the laminate of the metal plates to the top plate and the bottom plate by applying a load at a high temperature;
• pressing the bottom plate to form the closed-top tubular metal case;
• and
• disposing the piezoelectric body on a top inner wall of the closed-top tubular metal case.