Ultrasonic transducer for a measuring device

An ultrasonic transducer for a measuring device that transmit and receives ultrasonic waves, comprising:

• a housing container with a support body;
• and
• a piezoelectric element with a substantially circular outer shape supported by the support body, wherein
• the support body includes a surface shape corresponding to the pyramidal surface of a polygonal pyramid or polygonal truncated pyramid and is a support plate that is generally convex or concave on the outside of the support plate, and
• the piezoelectric element includes multiple substantially sector-shaped oscillation parts that are divided by multiple grooves that communicate with each other at the central part and extend radially so as to oscillate in the thickness direction in the first frequency band, as well as to oscillate in the radial direction in the second frequency band, which is lower than the first frequency band.

An ultrasonic transducer for a measuring device that transmits and receives ultrasonic waves, comprising;

• a housing container with a support body;
• and
• a piezoelectric element with a substantially circular outer shape supported by the support body, wherein
• the support body includes a surface shape corresponding to the pyramidal surface of a polygonal pyramid or polygonal truncated pyramid and is a support plate that is generally convex or concave on the outside of the support plate;
• and
• the piezoelectric element includes multiple substantially sector-shaped oscillation parts that are divided by multiple grooves that communicate with each other at the central part and extend radially;
• and soundproof sheets with double-sided tape arranged to fill multiple grooves in order to join and fix the multiple adjacent oscillation parts to each other, so as to oscillate in the thickness direction in the first frequency band, as well as to oscillate in the radial direction in the second frequency band, which is lower than the first frequency band.