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A Temperature Compensated Ultrasonic Sensor Operating in Air for Distance and Proximity Measurements

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5 Author(s)
Canali, C. ; Istituto di Elettrotecnica dell''Universitá di Bari, Italy. ; De Cicco, Giorgio ; Morten, Bruno ; Prudenziati, Maria
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An ultrasonic sensor operating in air was developed to measure distance (up to 100 cm) or to operate as a proximity sensor in a presettable distance range. The error in the measured distance is about ±1 mm while the accuracy is maintained within ±1 percent of the reading in the whole temperature range from -20°C to +110°C, being the temperature dependence of the sound velocity electronically compensated. As a proximity sensor it can overcome most of the drawbacks and limitations of inductive, capacitive, optical, and Hall-effect commercial proximity sensors.

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Industrial Electronics, IEEE Transactions on  (Volume:IE-29 ,  Issue: 4 )