7
Transducers
Introduction • Classification of transducers • Active and passive transducers • Force and displacement transducers • Resistance strain gauges • Bonded-type strain gauge • Summary
7.1 INTRODUCTION
Instrumentation systems generally consist of three major elements:
- An input device.
- A signal conditioning device.
- An output device.
The input device receives the quantity under measurement and delivers a proportional electrical signal to the signal conditioning device. Here the signal is amplified, filtered, or otherwise modified to a format, acceptable to the output device. The output device can be a Cathode Ray Oscilloscope (CRO) or a recorder.
The input quantity for most instrumentation systems is non-electrical. However, in order ...
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