QxSens


	The Next Joint European Effort

	Competitive and Sustainable Growth GROWTH FP5 Programme


Multi-channel measurement and control system based on resonant piezoelectric crystal sensors
		Duration: 3 Years Total Budget: 1.809 Mill. EUR 9 Partners 4 Countries BAW Piezoelectric Resonators

Abstract

The proposed project aims to the development of a multi-channel system for monitoring and control based on resonant piezoelectric crystal sensors (QxSens). Novel resonant sensors are used for the determination of various physical measurement quantities of technical importance.

The advantages of these sensors are high precision, high sensitivity and dynamic range, independence from strong electric and magnetic fields, and a frequency output signal ideally suitable for digital processing.

The universally applicable QxSens system offers temperature control, measurement of viscosity, density, and speed of sound in industrial processes of all kinds and therefore can contribute to a higher quality of many products. The benefits for product quality enhancement will be demonstrated in lyophilization of food, characterization of fuels, lubricant and hydraulic oils, and rayon fibre process control.


Contractors
Vienna University of Technology, Institut fuer Allgemeine Physik Ecole Nationale Supérieure de Mécanique et des Microtechniques; Laboratoire de Chronométrie, Electronique et Piézoélectricité Bulgarian Academy of Sciences, Institute of Solid State Physics Flucon Fluid Control GmbH Piezoquartz Ltd Point L-Bulgaria Ltd Institute of Cryobiology and Lyophilization, National Center of Agricultural Sciences AVL List GmbH Lenzing AG	AT FR BG DE BG BG BG AT AT


	Measurement Quantity		Measured value
QT, GT QH QV QV QD, QS QD, QC QF	Temperature Humidity (Dew point) Density·Viscosity Viscoelasticity Density, Speed of sound Density, Compressibility In situ liquid film thickness	T h ρ, η c' , c'' ρ, v ρ, c x , z	f f(T) , d d f, d f_m , f_n f_m , f_n f_m , f_n

C. REITER, P.W. KREMPL, F. KRISPEL, J. NEUBIG, W. WALLNÖFER, Crystal Thermometer for Temperatures up to 970 °C, Proc. Sensors 2003 Kongress Nürnberg, Germany, 13-15 May 2003 .

E. BENES, R. THALHAMMER, M. GRÖSCHL, H. NOWOTNY, S. JARY, Viscosity sensor based on a symmetric dual quartz thickness shear resonator, Proc. Joint Meeting of 2003 IEEE IFCS International Frequency Control Symposion and 17th EFTF European Frequency and Time Forum, Tampa, USA, 5-8 May 2003, Mo4B-1.

F. KRISPEL, C. REITER, J. NEUBIG, F. LENZENHUBER, P. W. KREMPL, W. WALLNÖFER, P. M. WORSCH, Properties and Applications of Singly Rotated GaPO4 Resonators, Proc. Joint Meeting of 2003 IEEE IFCS International Frequency Control Symposion and 17th EFTF European Frequency and Time Forum, Tampa, USA, 5-8 May 2003, Tu3B-3.

M. GRÖSCHL, R. THALHAMMER, G. KARLOWATZ, E. BENES, H. NOWOTNY, Viscosity Monitoring with a quartz crystal thickness shear resonator, Proc. of the 1st Congress of the Alps Adria Acoustics Associaton, Portoroz, Slovenia, 01-02 September 2003.

R. SCHNITZER, M. GRÖSCHL, E. BENES, A microprocessor controlled multi-channel measurement system for resonant piezoelectric BAW sensors, Proc. of the 1st Congress of the Alps Adria Acoustics Associaton, Portoroz, Slovenia, 01-02 September 2003.

R. BOURQUIN, B. DULMET, Thermal Derivatives of compliances, piezoelectric coefficients and permittivities in lagrangian description, Proc. Joint Meeting of 2003 IEEE IFCS International Frequency Control Symposion and 17th EFTF European Frequency and Time Forum, Tampa, USA, 5-8 May 2003, Tu4B-P23.

R.VELCHEVA, L.SPASSOV, YU. FILIPPOV, E. KULAGIN, V. MIKLAYEV, Thermosensitive Quartz Resonators under Fast Neutrons and Gamma Rays, Bulgarian Journal of Physics, vol.29 (30) 2003.

R. VELCHEVA, TS. YORDANOV, L. SPASSOV, YU. FILIPPOV, Thermosensitive Quartz Resonators NLC-Cut as Temperature Sensors, Sensors & Actuators, in review.

R. VELCHEVA, Investigation of temperature sensors based on thermosensitive quartz resonators, Summary of PhD thesis, Sofia University, 2003.