Question
Download Solution PDFWhich of the following represent active transducer?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFA transducer is an electronic device that converts energy from one form to another. Common examples include microphones, loudspeakers, thermometers, i.e.
Transducers can be classified into the following types:
- Active or Passive Transducers
- Analog or Digital Transducers
|
|
Active Transducer |
Passive Transducer |
|
Definition |
The transducer that generates the output in the form of voltage or current, without any external energy source. |
Transducers whose internal parameters like capacitance, resistance, and inductance change because of the input signal. |
|
Additional Energy Source |
Does not require |
Requires |
|
Working Principle |
Draw energy from the measured source |
Take power from the external source that changes the physical properties of the transducer. |
|
Design |
Simple |
Complicated |
|
Resolution |
Low |
High |
|
Examples |
Tachogenerator, Thermocouple, Photovoltaic cell, etc. |
Thermistor, Differential transformer, etc |
Analog transducers:
- These transducers convert the input quantity into an analog output which is a continuous function of time
- Thus, a strain gauge, an L.V.D.T., a thermocouple or a thermistor may be called as Analog Transducers as they give an output which is a continuous function of time
Digital Transducers:
- These transducers convert the input quantity into an electrical output which is in the form of pulses and its, output is represented by 0 and 1
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