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Chapter: Mechanical : Mechatronics : Mechatronics, Sensors And Transducers

Measurement System

A measurement system can be defined as a black box which is used for makingmeasurements. It has the input as the quantity being measured and the output as a measured value of that quantity.

MEASUREMENT SYSTEM

 

 

A measurement system can be defined as a black box which is used for makingmeasurements. It has the input as the quantity being measured and the output as a measured value of that quantity.

 

Example:

 

Elements of Measurement Systems:

 

Measurement system consists of the following three elements.

 

a) Sensor            b) Signal conditioner    c) Display System

Sensor:

 

A sensor consists of transducer whose function is to convert the one form of energy into electrical form of energy. A sensor is a sensing element of measurement system that converts the input quantity being measured into an output signal which is related to the quantity

 

Example:

 

Temperature Sensor    – Thermocouple

 

Input                           – Temperature

 

Output                        – E.M.F (Electrical Parameter).

 

Signal Conditioner:

 

A signal conditioner receives signal from the sensor and manipulates it into a suitable condition for display. The signal conditioner performs filtering, amplification or other signal conditioning on the sensor output.

 

Example:

 

Temperature measurement    – Single Conditioner function (Amplifier)

 

Input                                     – Small E.M.F value (From sensor)

 

Output                                   – Big E.M.F Value (Amplified).

 

Display System:

 

A display system displays the data (output) from the signal conditioner by analog or digital. A digital system is a temporary store such as recorder.

Example:             

Display       –  L.E.D  (or)  Number  on  scale  by  pointer  movement

Input – Conditioned Signal (from signal conditioner)

Output        – Value of the quantity (Temperature)      

 

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