Miniature Medical LVDT Sensor Assembly
Provides primary excitation coil, twin differentially paired secondaries, and movable core.
Biomedical Engineering / LVDT Displacement Sensor
FREE TO EXPLORELABORATORY 07 · BIOMEDICAL ENGINEERING
LVDT Displacement Sensor Linearity & Sensitivity for Chest Wall Expansion
Calibrate the differential secondary AC voltage output of a Linear Variable Differential Transformer (LVDT) as a function of core displacement for physiological respiration monitoring. Explore interactive physiological instrumentation simulation, biomechanics, and biomedical engineering telemetry.
BIOINSTRUMENTATION · BIOSIGNALS · BIOMECHANICS · IMAGING
Your virtual biomedical engineering laboratory.
DEMODULATED OUTPUT VOLTAGE V_DC—
PHYSIOLOGICAL & TEST CELL TELEMETRY
Ready to sample with Core x = 3.0 mm.
Adjust Core x, then execute biomedical trial.
Biomedical engineering telemetry and physiological states are evaluated rigorously using 64-bit IEEE 754 precision. Residuals reflect ordinary least-squares regression across successive observations. Continuous data structures support high-fidelity biological and physiological modeling.
Biomedical assumptions and boundary condition limits
The linear sensitivity model applies within the linear stroke envelope (x ≤ 6.0 mm for the tested unit). Evaluated using a miniature medical LVDT (stroke ±10.0 mm) excited by 3.0 V RMS at 2.5 kHz carrier frequency. Phase-sensitive synchronous demodulation outputs filtered DC voltage calibrated from 1.0 mm to 6.0 mm displacement.
Biomedical apparatus & physiological sensors.
Precision Non-Magnetic Micrometer Stage
Applies controlled axial core displacements with 1.0 μm mechanical positioning accuracy.
2.5 kHz Low-Distortion Sine Wave Carrier Generator
Supplies stable 3.00 V RMS sinusoidal primary excitation with < 0.1% distortion.
Phase-Sensitive Synchronous Demodulator & Filter
Converts differential AC carrier signal into rectified DC voltage with sign detection.
High-Precision 6.5-Digit Digital Multimeter
Measures demodulated DC output voltage V_dc with microvolt accuracy.
Non-Magnetic Aluminum Shielded Mounting Test Stand
Prevents external magnetic flux interference from distorting coil coupling.
FOLLOW THE METHOD
A reason behind every step.
Calibrate the differential secondary AC voltage output of a Linear Variable Differential Transformer (LVDT) as a function of core displacement for physiological respiration monitoring. Standardized parameter settings: 1.0, 2.0, 3.0, 4.0, 5.0, 6.0 mm.
01
Mechanical and Magnetic Null Centering
Mount the LVDT into the micrometer stage and adjust the core position until secondary AC differential voltage reaches absolute minimum (null voltage < 2.0 mV).
02
Carrier Excitation Frequency Standardization
Set the carrier function generator to 2.500 kHz at 3.000 V RMS, verifying stable primary coil current.
03
Initial Displacement Increment Seating
Advance the micrometer spindle to displace the magnetic core by exactly 1.000 mm from the calibrated null position.
04
Demodulated Output Voltage Logging
Record the filtered DC output voltage V_dc on the 6.5-digit multimeter after allowing 5 seconds for filter settling.
05
Displacement Step Progression
Advance the micrometer stage in 1.000 mm increments through 2.0, 3.0, 4.0, 5.0, and 6.0 mm, recording stabilized DC voltage at each step.
06
Sensitivity Regression and Linearity Verification
Plot demodulated DC voltage V_dc against displacement x, performing linear regression through zero to determine displacement sensitivity S_x.
YOUR NOTEBOOK · 0 OBSERVATIONS
Turn measurements into biomedical engineering insight.
Points are your recorded observations. The solid regression line validates LVDT Displacement Sensor mathematical scaling.
LINEAR REGRESSION FIT · y = mx + b
V_dc = S_x · x = 0.8500 · x
| # | Core Displacement x (mm) | Demodulated Output Voltage V_dc (V) | Core displacement x (mm) | Demodulated output V_dc (V) | Remove |
|---|
No readings yet. Execute a biomedical trial and record it.
Calculate it yourself.
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