Port / Connector details

Analogue Ports

Four ports which can be configured as inputs or outputs. Output levels are -5V to 5V with a 50Ω load, or -10V to 10V with infinite impedance. The four channels can be chosen from:

Combined speed
Longitudinal acceleration
Lateral acceleration
Local Z axis acceleration
GPS heading
GPS gradient
GPS speed
GPS speed accuracy
GPS number of satellites in solution
GPS derived lateral accel
GPS derived motorcycle lean angle

With RTK option:

RTK yaw
RTK pitch
RTK slip
RTK baseline
RTK accuracy

With IMU option:

Yaw rate
Pitch rate
Roll rate

When configured as inputs the channels have a range of 0-20v.

Pulse Output

The SPEEDBOX has a digital pulse output with frequency proportional to combined speed (0-5v). Pulse timing characteristics are user-configurable to allow the SPEEDBOX to act as a drop-in replacement for a wide range of ‘5th wheel’ devices.

Alternatively, the pulse output can be configured to output a time pulse which is precisely synchronised to GPS time, the timepulse is output once per second, at a 50% duty cycle.

Trigger Input

A trigger input allows synchronisation of the SPEEDBOX output with external events, such as pedal depression, or passing a marker point, such as a laser barrier. The trigger may be configured to either turn the outputs on/off or to send accurate time stamps on the serial port.

The RS232 timing message can be used in conjunction with the PC based timing software to give external trigger based timings for test start and end points.

CAN Output

The SPEEDBOX CAN outputs can be set up for the Race Technology standard CAN output addresses, or can be configured for user defined addresses and rates. .dbc files are available for the standard configuration. Full CAN message details are provided in the appendix.

RS232 / USB Output

Two serial outputs and one USB port are available. When in use the USB port disables serial port 2.

Serial 1 and 2 output binary messages in uBlox format, ASCII messages in NMEA format, and binary Race Technology format messages. In addition to configuration by the Race Technology configuration software, the uBlox message can also be configured using the uCenter software tool available free of charge from uBlox.

PC based measurement

In addition to using the SPEEDBOX as a sensor head with a data logging system, the SPEEDBOX can be connected directly to a PC for live data recording via serial or USB as well as real time performance measurements using the dedicated Performance Monitor software.

SPEEDBOX / Details