Question

State the function of ‘Signal Conditioner’ in measurement system.

Answer 1

Function of ‘Signal Conditioner’ :-- In Mechatronics systems, processing and controlling of physical parameters like temperature, pressure, flow, etc. is carried out by converting them into electrical signals by means of suitable transducers. Depending upon the excitation system or requirement of power supply, transducers are classified as passive and active. The excitation source (ac or dc) is necessary for passive transducers like potentiometers, strain gauges, etc. because these transducers do not produce their own output voltage or current. Similarly, amplification stage is also necessary to increase the level of output signal. Active transducers (piezoelectric, thermocouple, etc.) produce their own electrical output when physical quantities are applied to them, but amplifier stage is used to bring the output signal up to a suitable level. In both cases, amplifiers are used because the output is at low level. The output signal is amplified to bring it compatible with control elements, indicating and display devices, recorders, controllers and so on.

OR

The signal conditioner blocks in any instrumentation system because this blocks do the

functions of

i)Passive input from transducer to active output which can be in terms of electrical voltage or current.

ii) it amplify weak signal to strong signal.

iii) it can filter and remove the unwanted signal from input of transducer.

iv) it help in selectivity

v) it can convert analog to digital signal as require.

vi) it help for impedance from source to load,