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Vol. 201, Issue 6, June 2016, pp. 8-16

 

Bullet

 

Sound Propagation and Signal Quality of Ultrasonic Sensors
in Dependency on the Distance of the Transducers
 

Anett BAILLEU

HTW Berlin University of Applied Sciences, Department 1 – Energy and Information, Wilhelminenhofstr. 75A, Berlin 12459, Germany
Tel.: +49 30 5019-3341, fax: +49 30 5019-48-3341

E-mail: anett.bailleu@htw-berlin.de

 

Received: 2 May 2016 /Accepted: 6 June 2016 /Published: 30 June 2016

Digital Sensors and Sensor Sysstems

 

Abstract: In applications with ultrasonic clamp-on sensors measurement accuracy and repeatability are significantly worse when compared to ultrasonic inline sensors in spite of both sensor types using the same measurement principle. The positioning of the ultrasonic transducers of clamp-on sensors has a determining influence on the precision and accuracy of the measurement results. A study was made of sound propagation and receiver signal quality as they vary depending on the distance between the ultrasonic transmitter and the ultrasonic receiver. If the positioning of the ultrasonic transducers can be optimized, then the precision of the measuring in clamp-on applications is improved. As a result of studying transducer sensitivity it was possible to implement an automatic positioning system for ultrasonic clamp-on sensor applications. The positioning system automatically finds an optimal transducer position for a particular application, this allows a user to operate a clamp-on sensor without having any special knowledge of the application procedure or needing to set any parameters of the system in advance.

 

Keywords: Ultrasonic clamp-on sensor, Receiver signal quality, Propagation of sound, Dependency on distances of transducers, Automatic transducer positioning.

 

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