Sensor was mounted on front part of electric locomotive ( see pictures) to measure its dynamic parameters.
Place: Train Shcherbinsky polygon, Moscow region. Weather: -12 Cº, windy, no snowing / falling snow.
Connection of a cable to the sensor ISD-3.
Installation of the sensor.
The optical ISD-3 sensor is installed on the locomotive.
Sensor: the distance to the ground ab. 60 cm (± 20 – 25 cm tolerance), measurement frequency 24,6 Hz.
In a cabin of locomotive.
Measurements in progress. No snowing in the first half of the day.
Typical speed chart. No snowing.
More detailed.
Constant acceleration test.
Braking with different forces.
Second half of a day. Rather hard snowfall. At standstill, due to drifting snow some snowflakes crosses sensor area of view and generate signals. But at moving, the signal from bulk surface is much more and no influences of snowflakes anymore.
Maximum speed test. At high speed a lot of fluffy snow arise from ground and generated some extra noises, but real mean speed still can be measured.
Driving at a constant speed, the snowstorm.
