Transducer characteristics

The characteristics of the transducer are given below that are determined by examining the output response of a transducer to a variety of input signals. The method of computational and standard statistical can be applied to the test data. 

  • Accuracy
  • Noise 
  • Linearity
  • Sensitivity
  • Hysteresis
  • Size
  • Span 
  • Repeatability
  • Conformance
  • Resolution
  • Speed
  • Ruggedness
  • High output
  • High stability

1. Accuracy: It is defined as the closeness which the reading approaches an accepted standard value or ideal value or true value, of the variable being measured.

2. Noise: All transducers have some random noise in their output. So the small signals are largely affected by noise in comparison to larger signals.

3. Linearity: The output of the transducer should be linearity proportional to the input quantity under measurement. It should have linear input-output characteristics.

4. Sensitivity: The electrical transducer is defined as the electrical output obtained per unit in the physical parameter of the input quantity called sensitivity of the transducer.

5. Hysteresis: This property wherein a transducer output is dependent not only on the present input but also on the previous inputs.

6. Size: The transducer should have the smallest possible size and shape with minimal weight and volume. This will make the measurement system very compact. 

7. Repeatability: A transducer ability to produce identical output upon stimulation by the same input in termed as repeatability.

8. Speed: It is rapidity with which the transducer responds to changes in the measured quantity. The speed of the response of the transducer should be as high as practicable.

9. Ruggedness: The transducer should be mechanically rugged to withstand overloads. it should have overload protection.

10. High output: The Transducer should give reasonably high output signal so that it can be easily processed and measured. The output must be much larger than noise. Nowadays digital output is preferred in many applications.

11. Dynamic range: For a transducer, the operating range should be wide so that it can be used over a wide range of measurement conditions.

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