Big and metal can easily be picked up by magnetic induction sensors.
Or a light beam that is broken by the trains location.
Reflected or blocked sound can work too.
Sensing its physical weight with load cells placed under the tracks.
Big and metal can easily be picked up by magnetic induction sensors.
Or a light beam that is broken by the trains location.
Reflected or blocked sound can work too.
Sensing its physical weight with load cells placed under the tracks.
I want to detect whether the train in the platform or left the platform. No problem even if a train moving through the platform with out stopping is also detected.
They way they do it in industry is an inductive proximity sensor, these are like a little metal tube about 1" by 2" size and weather sealed. These trigger an output if any steel is close to the front of the sensor. Then they mount the sensor close to the track rail on the inside so it triggers when the steel train wheel goes past.
They way they do it in industry is an inductive proximity sensor, these are like a little metal tube about 1" by 2" size and weather sealed. These trigger an output if any steel is close to the front of the sensor. Then they mount the sensor close to the track rail on the inside so it triggers when the steel train wheel goes past.