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Motus Reference Manual
Page 98 of 146
Version 1.1
29/11/2019
15.4.25 Left Wheel Speed Sensor
This function is designed for the left wheel of a vehicle with dual wheel speed sensors.
15.4.26 Right Wheel Speed Sensor
This function is designed for the right wheel of a vehicle with dual wheel speed
sensors.
15.4.27 1PPS Input
This function is designed to allow external GNSS receivers to synchronise time with
Motus. It triggers on a transition from low to high.
15.4.28 Wheel Speed Sensor
This function is designed for high resolution vehicle speed sensors and wheel speed
sensors. It expects a normally low input with a high state for the trigger. If the pulse
length is more than 0.1 metres the odometer input function should be used, if it is less
than 0.1 metres this wheel speed sensor function should be used. Please contact
Advanced Navigation support for help integrating with your speed sensor.
Parameter Value
Trigger Low → High
Maximum Frequency 40 MHz
Maximum Pulse Rate 4,294,967,295 pulses/metre
Table 27: Wheel Speed Sensor Specifications
15.4.29 Wheel Encoder Phase A
This function is designed for rotary incremental quadrature encoders. It should be
used in combination with Wheel Encoder Phase B.
15.4.30 Wheel Encoder Phase B
This function is designed for rotary incremental quadrature encoders. It should be
used in combination with Wheel Encoder Phase A.
15.4.31 Event 1 Input
This function is designed to allow external events to be recorded inside Motus's
output. The event is recorded in the filter status, see section 16.9.1.2, and resets after
the next packet is output. The event triggers on a transition from low to high.
15.4.32 Event 2 Input
This function is designed to allow external events to be recorded inside Motus's
output. The event is recorded in the filter status, see section 16.9.1.2, and resets after
the next packet is output. The event triggers on a transition from low to high.