Ultrasonic receiver transmitter
A technology for receiving transmitters and ultrasonic waves, which is applied in the directions of sound wave re-radiation, instruments, sensors, etc., can solve the problems such as the decrease of reflection sensitivity, and achieve the effect of small change in electrostatic capacity and high reflection sensitivity
Inactive Publication Date: 2006-05-10
NIPPON CERAMIC CO LTD
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AI-Extracted Technical Summary
Problems solved by technology
To solve the problem that a temperature compensating capacitor used as a remedy for change in electrostatic capacity due to change in temperature, increase in reverberation time, and inability of obstacle detection in a close range is high-cost, and that the reflection sensitivity is deteriorated when invar alloys or the like of low thermal expansion are adhered between a bottomed cylindrical case and a piezoelectric element, to the opposite side of the piezoelectric element on the side of the case in the shape of a cylinder with bottom or to both sides of a piezoelectric element, in a conventional ultrasonic wave transmitting and receiving device. In the ultrasonic wave transmitting and receiving device, annularly formed invar alloys or the like of low thermal expansion are embedded in an annular groove provided on the surface for adhesion of the piezoelectric element of the bottomed cylindrical case by adhesion, press-fitting or the like, and the piezoelectric element is adhered on it. In this way, obstacles can be stably detected in a wide range of temperature without using a temperature compensating capacitor and without deterioration of reflection sensitivity.
Piezoelectric/electrostrictive transducersMagnetostrictive transducers +2
Close rangeElectricity +9
- Experimental program(1)
Description & Claims & Application Information
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