A
Arto Sarle
- Jan 1, 1970
- 0
Hi all,
I'm looking for advice on what would be the best method for a
home-built transponder to detect when it has crossed over a certain
point (the finish line, of course) on a kart car track.
After passing over the finish line, the transponder needs to transmit
timing information (via RF) to a PC. The reason I want an "active"
transponder is that at some point in the future it can be used to
transmit other telemetry as well.
At the moment I'm thinking of creating a localized EM field at the
finish line by burying a wire loop or permanent magnet there, and then
including a magnetic (Hall effect) sensor or switch in the
transponder.
Provided that the transponder would be mounted in the car 10-20 cm
above the track surface and the car may be moving up to 80 km/h, do
you think this method would work reliably? Most uses for Hall sensors
seem to be in the millimeter range.
I'd much appreciate your thoughts or any suggestions for a better
transponder activation method!
Best regards,
Arto
I'm looking for advice on what would be the best method for a
home-built transponder to detect when it has crossed over a certain
point (the finish line, of course) on a kart car track.
After passing over the finish line, the transponder needs to transmit
timing information (via RF) to a PC. The reason I want an "active"
transponder is that at some point in the future it can be used to
transmit other telemetry as well.
At the moment I'm thinking of creating a localized EM field at the
finish line by burying a wire loop or permanent magnet there, and then
including a magnetic (Hall effect) sensor or switch in the
transponder.
Provided that the transponder would be mounted in the car 10-20 cm
above the track surface and the car may be moving up to 80 km/h, do
you think this method would work reliably? Most uses for Hall sensors
seem to be in the millimeter range.
I'd much appreciate your thoughts or any suggestions for a better
transponder activation method!
Best regards,
Arto