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LVDT Trainer (Pressure Measurement)

A LVDT is used to measure displacement by assigning a specific signal value for any given position of the core. The primary core position determines how tightly its signal becomes when coupled with each of the secondary coils. The two secondary coils are series-opposed, resulting in the two signals on each secondary being 180 degrees out of phase. Therefore the phase of the output signal determines its direction, amplitude, and distance.

An LVDT is incorporated into a pressure measurement device by connecting the core of the LVDT to the centre of a pressure sensing diaphragm, so that any flexing of the diaphragm due to changes in pressure will be detected as a position change by the LVDT.

The experimental setup with steel case and integrated power supply and Digital panel meter for measurement of voltage. The LVDT fitted with Bourdon type Pressure Gauge .The pressure is measured in terms of voltage.

  • The experimental setup helps to study : Pressure vs. Output voltage of LVDT.

The setup consists of the following specifications:

    1. Transducer : Linear Variable Differential Transformer ( LVDT )  fitted with Pressure gauge.
    2. Excitation  : Air pressure pump fitted into one end of the Air Tank and other end is connected to the  Bourdon type Pressure Gauge.
    3. Electronic Block  : Stable I.C. based oscillator with power amplifier.
    4. Phase sensitive detector.
    5. Differential Amplifier.
    6. Amplifier with adjustable gain.
    7. Output Indicator  :  Digital Voltmeter : 0 – 20 V, 3 ½ digit Digital Display.