Lap Trigger
Lap trigger (timing beacon)
Why do we need a lap trigger (timing beacon)?
▪ Vehicle lap time measurement
▪ Calculation of lap‐dependent functions (lap fuel consumption, min/max val‐
ues)
▪ Calculation of lap distance dependent functions
▪ Control of data logging system
System consists of
▪ Transmitter (trackside unit)
▪ Receiver (in‐vehicle unit)
Lap Trigger
Receiver
Lap Trigger
Transmitter
Types of systems
▪ GPS based (low cost, low precision)
▪ IR based (low cost, high precision, limited reliability)
▪ RF (microwave) based (high precision, high reliability)
Electrical trigger signal
In DDU 8 all sources of measurement channels can be used as trigger signal.
▪ Analog input
▪ Digital input
▪ CAN input
Signal (measurement channel) properties
Low active signal (Bosch triggers): Trigger releases if signal is below the thresh‐
old.
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14 | Lap Trigger
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DDU 8 Manual
Bosch Motorsport