A lead-zirconate-titanate disc, with a double electrode system, has been used as a sensing element in a piezoelectric ceramic load cell. Variations in output voltage at a fixed excitation frequency, and also the shift in resonant frequency with respect to change in load, have been measured. It is shown that the maximum sensitivity and optimum performance is achieved when the disc is made to vibrate in the radial mode at a frequency lower that the resonant frequency of the unloaded disc. The effects of various parameters on the performance of loadcell are also discussed, along with linearity, temperature stability and repeatability.
Get full access to this article
View all access options for this article.
References
1.
Andrev, V.V. and Luk' Vanchikov, L.A.1970. 'Pressure measurements by piezoelectric transducers in the combustion of condensed explosives', Instrum Exp Tech, 13, 1764.
2.
Baranovski, S.N. and Shestopal, V.O.1975. 'Variation of the frequency of a piezoelectric resonator under the influence of friction forces as a function of the pressure on the contact surfaces', Sov Phys Acoust, 21, 7.
3.
Bindal, V. N. (ed.) 1980. 'Ten years of applied ultrasonics', National Physical Laboratory , New Delhi, 16.
4.
Bindal, V.N., Som, J.N. and Ashok Kumar.1979. 'Performance and characteristics of a piezoelectric ceramic transducer for measuring static force', Symp Electron Instrumentation at IETE, Pune , India, March 3.
5.
Hatscheck, R.1966. 'Piezoelectric transducers and their applications' , Indus Electron, 4, 513.
6.
Jain, G.C., Bindal, V.N., Janardan Singh, Ved Singh, Narayana Swami and Soni, N.C.1980. 'The frequency and temperature dependence of dielectric and electromechanical properties of piezoelectric material developed at NPL' , International Conference and Exhibition on Ultrasonic (ICEU-80), National Physical Laboratory, New Delhi, 18-20 July, 431.
7.
Langenecker, B.1962. 'Piezoelectric device for measuring dynamic and static forces', Rev Scient Instrum, 33, 47.
8.
Minaev, I.G. and Trofimov, A.I.1972. 'The use of piezoelectric transducer for measurement of static pressures', Izv Vuz Pribrostr (USSR), 15, 32.
9.
Minaev, I.G. and Trofimov, A.I.1973. 'Calibration characteristics of static pressure piezoelectric transducer', Meas Tech, 16, 619.
10.
Minaev, I.G., Trofimov, A.I. and Sharepov, V.M.1975. 'On the linearisation of the output characteristics of piezoelectric force measuring transducer', Izv Vuz Pribrostr (USSR), 18, 24.
