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Vol. 10, Special Issue, February 2011, pp.13-29

 

Bullet

Intelligent Sensor for Non-destructive Tests Applications

 

Irinela CHILIBON

National Institute of Research and Development for Optoelectronics,

INOE-2000, 409 Atomistilor Street, P.O. Box MG 5, 77125, Romania

Tel./fax: 4021.4574522, e-mail: qilib@yahoo.com

 

 

Received: 1 November 2010   /Accepted: 11 January 2011   /Published: 8 February 2011

 

Abstract: This paper presents theoretical and experimental research concerning the manufacture of an intelligent piezoceramic sensor for non-destructive tests (NDT) applications in non-metallic materials. The impact-echo method is suitable for determination of flaw in the material structure, based on stress wave propagation. This method could be applied for non-metallic materials with rugged and non-homogeneous structures. The active element of the intelligent piezoceramic sensor for NDT applications is a piezoceramic disc which converts the vibrations into electrical signal, amplified by an amplifier electronic circuit. The radial resonant frequency of the piezoceramic disc is 40.5 kHz, optimum for the ultrasound and low frequency sound vibration propagation into non-metallic materials. The intelligent sensor with piezoceramic disc is composed by: PZT piezoceramic disc, mechanical elements, acoustic attenuation element and amplifier electronic circuit, all together fixed into a cylindrical aluminium case. The advantage of this sensor is the possibility to be controlled by microcontroller.

 

Keywords: NDT, Impact-echo method, PZT, Piezoceramic disc, Ultrasound

 

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