Evandor

How the sensing works

Electrical Capacitance Tomography reconstructs the field between boundary electrodes, needing no window or probe. One architecture reads inside propulsion structures where the decisive condition would otherwise remain hidden.

Recovering the interior arrangement of material from boundary capacitance is an inverse problem, solved through electrode design, forward modelling and regularised reconstruction. It is a measurement method built around practical deployment, not a laboratory-only imaging system.

How Evandor's electrode array measures a propulsion cross-section Twelve electrodes surround a circular motor cross-section. One electrode transmits at a time while the remaining electrodes read. The measured frames continue into a live chart and a moving reconstruction. ONE TRANSMITS ELEVEN READ CAPACITANCE FRAMES CONTINUOUS TIME HISTORY RECONSTRUCTION LIVE, MODEL-LED ESTIMATE
Illustrative signal chain. One electrode is driven in sequence while the remaining electrodes read. The chart and reconstruction are stylised to show a continuously updating measurement rather than a still image.

01 / EXCITE

Apply a field

One boundary electrode is driven in sequence around the measurement plane.

02 / READ

Record responses

The remaining electrodes read capacitance across the motor section many times a second.

03 / RECONSTRUCT

Solve the model

Software estimates internal distribution or targeted parameters from the same frames.

04 / COMPARE

Build history

Repeated measurements can be compared against a calibrated baseline for the same article.

01Software

The raw measurement is the enduring asset.

Capture once. Analyse more than once.

Tomographic reconstruction can describe where material properties differ. A direct, model-based calculation can instead follow a limited set of indicators. Both start from the same capacitance frames; retaining those frames makes it possible to improve analysis without repeating the original test.

FORWARD MODELEXPECTED RESPONSE
Forward model. Geometry, material assumptions and calibration data define how the expected field response is interpreted.
MEASURED RECONSTRUCTIONMEASURED FRAMESESTIMATED INTERIOR
Measured reconstruction. The measured field can then be solved into a live estimate of the interior or reduced to condition indicators, depending on the application.

Explore a sensing feasibility study

Tell us which internal feature or condition matters, along with available geometries, reference articles and measurement constraints. We will distinguish demonstrated capability from work still to be validated.

info@evandor.co.uk