Sensing and privacy
Magnetometer
Magnétomètre
Magnetometer is a sensor that measures magnetic-field changes, which can be used to infer the presence of a nearby vehicle. Curbside detection requires suitable placement and calibration because vehicle shape, adjacent movement, and environmental conditions influence the relationship between a magnetic signal and actual occupation.
Understanding the term
A detection event is an inference from a physical signal. Validate performance across representative vehicles and adjacent-lane activity before interpreting every signal transition as an arrival or departure.
Validate the measurement against an independent reference under representative conditions. Record uncertainty, coverage, missing intervals, and the difference between a raw observation and an inferred activity. Technical outputs should be used only for purposes they can support reliably. Assign responsibility for calibration, corrections, access, and retention, and assess privacy across the complete data flow. An operational dashboard can conceal measurement errors if it displays precise values without their method or limitations.