This is a displacement-to-electrical signal conversion technology
based on the principle of electromagnetic induction, often used to
convert the minute mechanical displacement caused by pressure into
measurable electrical signals.
Main Features and Advantages
- Robust structure and resistance to harsh environments: The sensing
part (coil, core) has no semiconductor junctions, making it
resistant to high temperatures, radiation, and strong
electromagnetic interference (it is an electromagnetic component
and requires shielding from external interference).
- High resolution and sensitivity: Especially the differential
transformer type, it can detect extremely small displacements
(sub-micron level).
- Long service life and high reliability: No contact wear
(differential type), theoretically infinite service life.
- Strong output signal: Usually has a large output signal amplitude
and a good signal-to-noise ratio.
- High response frequency: Suitable for measuring dynamic pressure
changes.
Typical application scenarios
- Aerospace :
- Engine oil pressure, hydraulic system pressure.
- Static and dynamic pressure measurement of aircraft (high
reliability, wide temperature range requirements).
- Industrial process control:
- Differential pressure measurement: combined with diaphragm or
bellows, pressure is first converted into displacement, and then
measured by LVDT. Commonly used in flow and liquid level
calculation.
- Valve position feedback (utilizing its displacement measurement
nature).
- Laboratory and test bench:
- High-precision pressure calibration equipment, wind tunnel testing.
- Energy and power:
- Oil pressure of turbine speed control system, pressure monitoring
in specific nuclear power plant sections (radiation resistance).
- Heavy machinery:
- Hydraulic system pressure monitoring of construction machinery and
ships.
The inductive pressure transmitter is a classic technical approach
that combines "high-reliability and high-precision displacement
measurement" with "pressure measurement". It achieves stable
measurement not through semiconductor characteristics but through
precise mechanical structures and classical electromagnetic laws.
