Generalized measuring systems and its functional
elements.
(a) Primary
sensing element
(b) Transducer
element
(c) Data
manipulation element
(d) Data
transmitter element
(e) Data
process element
(f) Data
presentation element
(a) Primary sensing element:
The element
that is sensitive to the measuring variable. The sensing element senses the condition
and process the variable by extracting a small part of energy and producers and
output which is proportional to the input.
(b) Transducer element:
The element
that converts signal from one physical form to another form without changing
the information contained.
Example:
bourdon tube and bellows which transfers pressure into displacement.
Rack and
pinion which converts Rotary into linear vice versa.
(c) Manipulation element:
This element
modifies the director signal by amplification (increase the power /strength)
and filtering (removing unwanted noise and signals)., So that desired output is
produced.
(d) Data transmission element:
An element
that transmits the data or signal from one location to another location without
changing the information contained.
The data may
be transmitted over long distance (from one location to another location( or
short distance (from test centre to the nearby computer)
(e) Data processing element
An element
that modifies the data before it is displayed or finally recorded.
If any
corrections or errors occur in the data the processing element modifies the
data.
(f) Data presentation element.
An element
that provides recorded data or indication of output from the data processing
element.
Tags: ICS, Instrumentation, control systems, control system, measurement