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Transducers

Transducers. Gordon Shering. Introduction . What is a transducer. Different types of transducers. Examples of commercial transducers. Using transducers on control systems. What is a Transducer?. A device for turning one form of energy into another form of energy. Transducer. Output.

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Transducers

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  1. Transducers Gordon Shering By Gordon Shering

  2. Introduction • What is a transducer. • Different types of transducers. • Examples of commercial transducers. • Using transducers on control systems. By Gordon Shering

  3. What is a Transducer? • A device for turning one form of energy into another form of energy. Transducer Output Input By Gordon Shering

  4. Output Input What is a Transducer? Transducer • The input can be length, force, pressure, light, tempature etc. • The output can be anything but most typically an electrical (analogue) signal. • The analoge siganal may be converted into a digital signal with an ADC for computer systems By Gordon Shering

  5. Transducer Output Input Transducers • The input can be length, force, pressure, light, tempature etc. • The output can be anything but most typically an electrical (analogue) signal. • The analoge siganal may be converted into a digital signal with an ADC for computer systems By Gordon Shering

  6. Position Transducers • A Potentiometer may be used to measure position or movement. • Electrical contacts age and can become unreliable. By Gordon Shering

  7. Liquid Level Transducers • A Potentiometer used with a float to measure liquid level. • Is this used in a car to measure petrol?. By Gordon Shering

  8. Pressure Transducers • A Potentiometer used with bellows or a diaphragm to measure presure. By Gordon Shering

  9. Pressure Transducers • Other ways to measure pressure. By Gordon Shering

  10. Position Transducers (Magnetic) • Using magnetic coupling has the advantage that there are no rubbing contacts. By Gordon Shering

  11. Position Transducers (Capacitive) • Using capacitive coupling can also be used and also has the advantage that there are no rubbing contacts. By Gordon Shering

  12. Position Transducers (Optical) • Optics can be used to give a digital output directly. In this case rotational position is being measured. By Gordon Shering

  13. Position Transducers (Optical) • What is the name for the cyclic code on the right.? • Why is the wheel on the write normally used instead of the wheel on the left.? By Gordon Shering

  14. Force Transducers (Strain gauge) • A strain gauge can be used to measure force. • This could be used as a weighing machine. By Gordon Shering

  15. Force Transducers (Strain gauge) • Real commercial strain gages are designed to give maximum sensitivity. By Gordon Shering

  16. Temperature Transducers • A thermo couple uses two different metals that generate a voltage when they are heated. By Gordon Shering

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