| 摘要 |
PURPOSE:To solve the accumulation of bubbles at the lower face section of a ultrasonic sensor, suppress the attenuation of ultrasonic waves, improve the propagation state of ultrasonic waves, and allow accurate measurement. CONSTITUTION:A ultrasonic sensor 1 is constituted of a sensor main body section 3 and a sensor cover 4 covering the sensor main body section 3, the bottom face section 11 of the sensor cover 4 is formed into a slant face, water (or an antifreezing solution) for ultrasonic propagation is sealed between the sensor cover 4 and the sensor main body section 3, and an organism repellent paint is coated on the surface of the sensor cover 4. |
