1. Time-of-flight telemetry
1.1 Measuring principle
Time-of-flight telemetry (laser telemetry) is a non-contact measurement method based on measuring the round-trip propagation time (Δt ) of light between the sensor and the part to be measured.
The measured distance is :
with :
- c :
-
speed of light.
To measure the propagation time Δt, which can be short (1 ns for a distance to be measured of 15 cm), two methods are used:
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Time-of-flight telemetry
Interferometry
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