Force Measurement

Abstract

A variety of transduction technologies are available for the measurement of force. Some of the more common ones, including strain gauge and piezoelectric types, are described in this article. There are several important considerations when dealing with force measurement, which include measurement range, linearity, accuracy, sensitivity, frequency response, and aliasing. The accuracy of the force measurement can be limited by incorrect interpretation of the output from a transducer. Errors can occur due to poor sensitivity and nonlinear behavior. The measurement of dynamic force also requires consideration of the frequency response characteristics of a transducer. To avoid large errors, it is important to choose a force transducer with a natural frequency that is significantly greater than the maximum frequency of interest in the force measurement. Choice of transduction technology will deal with most of these issues to a greater or lesser degree. Examples of specific applications of force measurement in biomedical engineering will be presented in this article.

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