E-Textiles

E-Textile Strain Sensor Resistance & Resolution Modeler

Gauge factor sells the sensor; the ADC decides what it can actually see. Resolve those two before choosing the yarn.

Sensor Knitted element
Ω
%
Read-out Divider & ADC
V
bits

Resistance Under Strain

— Ω

At the applied strain and gauge factor

Response & Read-out

Resistance Change
— Ω
Change as Share of Base
— %
Sensitivity
— Ω per % strain
Divider Output Swing
— V
Resolvable Strain
— %

Assumes a linear gauge factor and a fixed divider resistor equal to the unstrained sensor. Real knitted sensors are markedly non-linear, hysteretic and drift with wash and wear, so calibrate over the working range and re-zero rather than trusting a single gauge factor across it.

E-Textile Strain Sensor Resistance & Resolution Modeler — free, with the formula and a worked example, at Textile School.