lecture2(Snr) - 2. Sensors and Transducers...

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Page 1 Types and Characteristics Types and Characteristics The active element of a sensor is called the transducer. The type of transmission of information can be classified into the following energy domains : Radiant Mechanical Thermal Electrical Magnetic Chemical 2. Sensors and Transducers 2. Sensors and Transducers
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Page 2 In terms of the utilization of energy, sensors can be further classified as passive and active . A passive sensor requires no energy source other than the input signal, e.g. thermocouple An active sensor on the other hand requires energy input to function, e.g. strain gauge Active & Passive Sensors
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Page 3 Various forms of output are possible, such as Analog output Digital output Frequency output Coded output Forms of output signals Forms of output signals
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Page 4 T he class of active sensors can be of Resistance Capacitance Inductance Voltage or current Classes of active sensors Classes of active sensors
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This note was uploaded on 11/09/2009 for the course ENG 91301 taught by Professor Lui during the Spring '08 term at Hong Kong Institute of Vocational Education.

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lecture2(Snr) - 2. Sensors and Transducers...

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