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Chapter 8: DEVELOPMENT IN INSTRUMENTATION & MEASUREMENT - Coggle…
Chapter 8: DEVELOPMENT IN INSTRUMENTATION &
MEASUREMENT
Definition: focusing on the use of digital computer and development of new type sensor.
Fibre Optic Transducer
type of sensor which work on the
principle of alteration of light by external variable like motion, pressure, temperature, flow, strain and etc
The fibre act as light conductor consist of thin strands of
dielectric material like glass, quartz and plastic.
The principle?
The core diameter is very small which the
average value is 50µm.
Core region have a slightly higher refractive
index compared than cladding.
Consists of a thin, low-loss glass wire with a
centre /core region.
Typical optical fibre
Advantage
Compatibility with attached to modern
electronic circuit.
Capability with fibre optic telemetry
system.
Low weight and small size hence small
sensor size.
High sensitivity and fast responses due
to low thermal and inertia mass.
Enchancec safety due to its non metallic construction and absence of high voltages, spark,
Applications.
Major application is as a medium of data transmission.
Transpacific data cable (internet). UniFi.
Fibre optic pressure transducer.
Fibre optic accelerometer.
Fibre optic temperature sensor.
Fibre optic flow sensor.
Data Transmission.
Parallel transmission.
Each bits transmitted simultanieously
*Speed of transmission high.
*The cost also high due to increase number of wires
Serial transmission.
*The cost are less compare
to parallel transmission.
*Speed of transmission
slow.
*Each bit transmitted one by another which all the bits and position and duration is controllled and keep track of. (Handshaking Process)
