Anatomical Transtibial Residual Limb Mannequin
Provides rigid skeletal core (tibia/fibula) surrounded by elastomeric soft-tissue simulating muscle and skin.
Biomedical Engineering / Prosthetic Socket Interface Pressure
FREE TO EXPLORELABORATORY 26 · BIOMEDICAL ENGINEERING
Transtibial Prosthetic Socket Patellar-Tendon Interface Pressure Mapping
Map the interface contact pressure at the patellar-tendon bar of a patellar-tendon-bearing (PTB) prosthetic socket as a function of axial limb weight-bearing load. Explore interactive physiological instrumentation simulation, biomechanics, and biomedical engineering telemetry.
BIOINSTRUMENTATION · BIOSIGNALS · BIOMECHANICS · IMAGING
Your virtual biomedical engineering laboratory.
PATELLAR-TENDON INTERFACE PRESSURE P_PTB—
PHYSIOLOGICAL & TEST CELL TELEMETRY
Ready to sample with Axial Load W = 400.0 N.
Adjust Axial Load 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 sensitivity model applies to static axial loading; dynamic ambulation introduces coupled shear stresses and moment loads. Evaluated on an anatomically contoured robotic residual limb mannequin with silicone soft tissue surrogate (Shore 20A durometer) fitted inside a carbon-fiber PTB prosthetic socket. Instrumented with calibrated thin-film piezoresistive pressure sensors at the patellar-tendon bar. Linear sensitivity k_soc = 0.2200 kPa/N across loads from 200 N to 700 N.
Biomedical apparatus & physiological sensors.
Carbon-Fiber Patellar-Tendon-Bearing Prosthetic Socket
Custom-laminated below-knee socket with inward patellar-tendon weight-bearing indentation bar.
Thin-Film Piezoresistive Pressure Sensor Array (Tekscan F-Socket)
Matrix of flexible sensors (thickness 0.15 mm) measuring local interface pressure up to 250 kPa.
Servohydraulic Biomechanical Axial Loading Ram
Applies controlled vertical limb loads W from 200 N to 700 N with closed-loop force control.
Multichannel Piezoresistive Digital Interfacing Hub
Scans 96 pressure matrix sensing cells at 100 Hz with 8-bit gray-scale spatial mapping.
Pneumatic Pressure Sensor Calibration Bladder
Applies uniform hydrostatic pressure steps to calibrate piezoresistive array prior to limb insertion.
FOLLOW THE METHOD
A reason behind every step.
Map the interface contact pressure at the patellar-tendon bar of a patellar-tendon-bearing (PTB) prosthetic socket as a function of axial limb weight-bearing load. Standardized parameter settings: 200.0, 300.0, 400.0, 500.0, 600.0, 700.0 N.
01
Sensor Matrix Equi-Pressure Calibration
Place thin-film sensor array inside pneumatic bladder calibration chamber and apply 50, 100, and 150 kPa pressures to generate cell-by-cell calibration lookup tables.
02
Sensor Placement along Patellar-Tendon Bar
Affix calibrated sensor matrix securely along the patellar-tendon bar and medial tibial flare of the residual limb mannequin using skin-safe adhesive film.
03
Prosthetic Socket Donning and Alignment
Carefully don a 6 mm silicone gel prosthetic liner and seat the residual limb into the carbon-fiber PTB socket, verifying anatomical alignment.
04
Axial Load Initialization and Seating Tare
Position the prosthetic assembly under the vertical loading ram and apply a 50 N tare load to bed down the elastomeric liner.
05
Stepwise Axial Weight-Bearing Progression
Increment axial vertical load through 200, 300, 400, 500, 600, and 700 N, recording stabilized mean patellar-tendon contact pressure P_ptb at each step.
06
Load Sensitivity Regression Analysis
Plot patellar-tendon interface pressure P_ptb against total axial load W and compute the socket load transfer constant k_soc via linear regression.
YOUR NOTEBOOK · 0 OBSERVATIONS
Turn measurements into biomedical engineering insight.
Points are your recorded observations. The solid regression line validates Prosthetic Socket Interface Pressure mathematical scaling.
LINEAR REGRESSION FIT · y = mx + b
P_ptb = k_soc · W = 0.2200 · W
| # | Applied Axial Limb Load W (N) | Patellar-Tendon Interface Pressure P_ptb (kPa) | Axial limb load W (N) | Patellar tendon interface pressure P_ptb (kPa) | Remove |
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