How does a transducer work?

Question

Please anyone a simple explanation?

Answer 1

A transducer takes one form of energy and delivers a different type of energy. The speaker in your stereo is a type of transducer. A speed transducer, of the spinning disk variety takes the speed of the shaft it is mounted on, with a slotted disk on that shaft, and using a light source, changes the rotational speed into pulses of electricity because the light source is 'chopped' by the slotted disk, which that light turns a photo (light) detector on and off, thus producing the pulses. A pressure transducer takes the force applied to it, and changes the resistance of the resistor bridge attached to it. A current flowing through the resistor bridge changes value based on the deflection of the pressure transducer diaphragm.

Answer 2

Pick one...there are many. Strain gage, load cell accelerometer, angle of attack, pressure, displacement, thermocouple, hall effect, antenna...



The strain gage is a good start. Put a copper etch on a flexible material. in a ziz-zag pattern. When you flex (or stretch) the material in a specific direction, the copper stretches. This increases the resistance. Flex in the opposite direction, compressing the copper, and it decreases resistance.

If you were to put the strain gage on a rubber diaphragm inside a tube, you could make a pressure sensor.

Put a weight on the diaphragm of the pressure sensor and you could make an accelerometer.

Other things like displacement transducers are like solenoids..

Answer 3

That's too broad a question.  A transducer is anything that changes electrical energy into some other form or visa-versa.  Motors, speakers, microphones, solar cells, pressure sensors, generators are all examples of transducers work many different ways.