Multi-Component Piezoelectric Force Platform
Measures triaxial forces (Fx, Fy, Fz) and moments (Mx, My, Mz) with 0.1 N resolution and 1000 Hz bandwidth.
Biomedical Engineering / Gait Analysis Ground Reaction Force
FREE TO EXPLORELABORATORY 25 · BIOMEDICAL ENGINEERING
Instrumented Gait Analysis Force Plate Ground Reaction Force & Velocity Scaling
Measure multi-axis ground reaction forces (GRF) using an instrumented piezoelectric force plate and evaluate the linear velocity scaling of the peak vertical force F_v/BW. Explore interactive physiological instrumentation simulation, biomechanics, and biomedical engineering telemetry.
BIOINSTRUMENTATION · BIOSIGNALS · BIOMECHANICS · IMAGING
Your virtual biomedical engineering laboratory.
NORMALIZED PEAK VERTICAL GRF F_V/BW—
PHYSIOLOGICAL & TEST CELL TELEMETRY
Ready to sample with Velocity v_w = 1.2 m/s.
Adjust Velocity v_w, 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 velocity model applies across normal walking speeds (0.8 to 1.8 m/s); running involves a discrete gait transition with different mechanics. Evaluated on healthy adult human subjects (body mass 70.0 kg, BW = 686.7 N) walking across an instrumented Bertec multi-component piezoelectric force platform (600 mm × 400 mm). Walking velocities from 0.80 to 1.80 m/s tracked via optical timing gates. Linear velocity scaling k_v = 0.2800 BW/(m/s).
Biomedical apparatus & physiological sensors.
Instrumented 10-Meter Gait Walkway
Provides seamless, flush-mounted level walking surface preventing targeting artifacts.
Dual Infrared Optical Timing Gates
Accurately measures average walking speed v_w over the middle 3-meter capture zone.
Multichannel Charge Amplifier & Signal Conditioner
Converts piezoelectric charge outputs into calibrated analog voltage signals with high drift stability.
Synchronous 16-Bit Data Acquisition Telemetry Console
Digitizes 6-channel force plate signals at 1000 Hz with digital Butterworth low-pass filtering (cutoff 20 Hz).
Body Mass Precision Calibration Scale
Determines subject static body weight (BW) to ±0.1 N prior to gait testing.
FOLLOW THE METHOD
A reason behind every step.
Measure multi-axis ground reaction forces (GRF) using an instrumented piezoelectric force plate and evaluate the linear velocity scaling of the peak vertical force F_v/BW. Standardized parameter settings: 0.8, 1.0, 1.2, 1.4, 1.6, 1.8 m/s.
01
Subject Anthropometry and Zero Tare Calibration
Measure subject body mass on calibrated digital scale, compute static body weight BW = m·g, and zero the force plate charge amplifier.
02
Optical Timing Gate Alignment
Position infrared timing gates 3.0 meters apart centered around the flush-mounted force platform and calibrate electronic timer.
03
Familiarization and Baseline Stride Setup
Allow subject several practice walking passes to establish natural stride length and ensure clean, un-targeted foot strikes onto the platform.
04
Controlled Velocity Gait Capture
Guide subject to walk at a standardized slow velocity (v_w = 0.80 m/s), verified by timing gate readout, and record 1000 Hz triaxial GRF telemetry.
05
Velocity Progression Sequence
Repeat clean foot strike trials across walking speeds of 1.00, 1.20, 1.40, 1.60, and 1.80 m/s, capturing three valid trials per speed step.
06
Peak Vertical Force Normalization and Regression
Extract peak weight-acceptance vertical force F_v, normalize to body weight (F_v/BW), plot versus velocity v_w, and calculate scaling factor k_v.
YOUR NOTEBOOK · 0 OBSERVATIONS
Turn measurements into biomedical engineering insight.
Points are your recorded observations. The solid regression line validates Gait Analysis Ground Reaction Force mathematical scaling.
LINEAR REGRESSION FIT · y = mx + b
F_v/BW = k_v · v_w + F_v0 = 0.2800 · v_w + 0.8200
| # | Forward Walking Velocity v_w (m/s) | Normalized Peak Vertical GRF F_v/BW (BW) | Forward walking velocity v_w (m/s) | Normalized peak vertical GRF F_v/BW (BW) | Remove |
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