chapter  11
13 Pages

Measurement of pressure distribution

ByEwald M. Hennig

Pressure is calculated as force divided by the contact area on which this force acts. It is measured in units of kPa (100 kPa = 10 N/cm2). Force measuring elements are needed to determine pressures and pressure distributions. There are only a few measuring principles that are commonly used to measure force. In the following section these principles will be described and their advantages and disadvantages will be discussed. Electro-mechanical transducers produce a change in electrical properties when subjected to mechanical loads. Depending on the type of transducer, forces can create electrical charges, cause a change in capacitance, modify the electrical resistance or influence inductance. Because inductive transducers are based on relatively large displacements, they are rarely used in measuring instruments for biomechanical applications.