The part of an electrical transducer that converts a mechanical or physical quantity into another physical quantity without an external power source is called the active element or detector element is called.
What is an electrical transducer?
Transducers that convert mechanical or physical quantities into electrical quantities are called electrical transducers. The parameters of the electrical transducer are discussed below:
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Parameters of electrical transducer
1. Linearity: There must be a linear relationship between the physical parameters (pressure, heat, vibration) and the converted electrical signal received.
2. Sensitivity: As a result of a single change in physical parameters, the electrical output is called sensitivity. (E.g. V / ºC in case of temperature sensor) High sensitivity is desirable for transducers.
3. Dynamic range: The operating range of the transducer should be wide so that a wide range can be used in measured conditions.
4. Repeatability: When a given input quantity (voltage, current frequency, etc.) is measured repeatedly and measurement is found near the same value, it is called the repeatability feature of the measurement. Repeatability is shown in the figure below:
5. Physical size: The weight and volume of the transducer should be low so that its presence does not interfere with the ongoing measurement system.
Characteristics of Electrical Transducer:
1. Amplification and attenuation are easy.
2. Mass-inertia is low.
3. Frictional reactions are low.
4. Modulation of output, transmission is easy.
5. Can be controlled remotely via sensors.
6. Its output control, display, recording is easy.
7. This facilitates signal conditioning and processing.
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