Telemetry Principles Zankhana Mehta block diagram of telemetry

Telemetry Principles Zankhana Mehta

block diagram of telemetry system

Types of Telemetry System • According to Energy Medium § Pneumatic, § Hydraulic • According to Electrical § Current, Voltage § Pulse • According to Signal Type § Analog, § Digital

Pneumatic Telemetry

Advantages • High effectiveness • High durability and reliability • Simple design • High adaptability to harsh environment • Safety • Easy selection of speed and pressure • Environmental friendly

Disadvantages • Relatively low accuracy • Low loading • Processing required before use • Uneven moving speed • Noise

Hydraulic Telemetry

Advantages ØIt gives more power than pneumatic systems. ØIts reliable to operate.

Disadvantages ØSlower motion than pneumatic. ØComplex construction. ØLeakage of oil problem ØMore maintenance than pneumatics Ø

Current telemetry

Current telemetry

Voltage Telemetry

Pulse Telemetry

Pulse Modulation

According to Signal Type • Analog Telemetry System: If the information in the form of current, voltage, Possion, frequency than the system is called analog system

According to Signal Type. . • Digital Telemetry System: If the information is transmited in the form of pulses than the system is called Digital telemetry system

Compare the merits and demerits of Hydraulic, Pneumatic and Electric Telemetry

Compare the merits and demerits of Hydraulic, Pneumatic and Electric Telemetry…. .

Standard output ranges of all types of telemetry systems • Current : 4 -20 m. A • Voltage : 0 -24 V • Pressure : 3 -15 psi

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