Chapter two
Sensors and transducers
Objectives
The objectives of this chapter are that, after studying it, the reader should be able to:
- Describe the performance of commonly used sensors using terms such as range, span, error, accuracy, sensitivity, hysteresis and non-linearity error, repeatability, stability, dead band, resolution, output impedance, response time, time constant, rise time and settling time.
- Evaluate sensors used in the measurement of displacement, position and proximity, velocity and motion, force, fluid pressure, liquid flow, liquid level, temperature, and light intensity.
- Explain the problem of bouncing when mechanical switches are used for inputting data and how it might be overcome.
2.1 Sensors and transducers
The ...
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