Electrical Measurement of Mechanical Quantities in Physiological Investigations

摘要

Electrical methods of measuring mechanical quantities permit determination of weight and linear dimensions of samples, linear and angular displacements, torque, point forces and pressures, vibrations, and deformation. The measurement of all of these quantities is based on their conversion by transducers into electrical quantities which may be determined by using standard electrical measuring instruments. The use of transducers in physiological studies involves, in most cases, the application of a suitable amplifier. A discussion is given of the application of transducers which convert mechanical quantities directly into electrical signals. They are divided into two groups: (1) energetic or generator transducers and (2) parametric transducers.