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ADR Functionality User Manual ADR Functional Reference

Event Logging

Note:

If power is lost during an event, the ADR uses a supercapacitor to maintain power for event logging and severe event

indication (flashing Status LED).

The following applies:

• The ADR can store up to 10 events in non-volatile flash memory.

• Each event contains 2 seconds of pre-trigger data and 30 seconds of post trigger data.

• The stored event contains:

o Accelerometer readings (3 axes), updated at 1000Hz.

o CAN bus channels (20 channels), updated at 100Hz.

o GPS speed, date, time and location (lat/long), updated at 20Hz.

• The ADR always attempts to maintain free space so that a new event can be logged.

• Whenever there are more than 8 logged events, the oldest non-severe event in the event log will be

automatically erased to free the log location for new events. Severe events are never automatically erased.

• Logging can be downloaded and erased using ADR Manager; see the Events Tab on page 7.

The generated log file for a stored event contains the following channels:

Channel Name Update Rate Description

X (G)

Y (G)

Z (G)

1000Hz Filtered accelerometer readings as logged by the ADR

CFC60 X (G)

CFC60 Y (G)

CFC60 Z (G)

1000Hz Filtered accelerometer readings with further post-filtering to the

SAE J211 CFC60 crash test standard

Trigger X (G)

Trigger Y (G)

Trigger Z (G)

1000Hz Filtered accelerometer readings used for event triggering

Trigger XY Vector (G)

Trigger XYZ Vector (G)

1000Hz Acceleration vector magnitude of the filtered readings used for

event triggering

GPS Time (H)

GPS Time (M)

GPS Time (S)

1000Hz Time (UTC), set by the time received on the GPS input

GPS Speed (km/h)

GPS Latitude (°)

GPS Longitude(°)

20Hz Speed and location received on the GPS input

Engine Speed (rpm)

Throttle Pedal Position (%)

Brake Pressure Front (kPa)

Brake Pressure Rear (kPa)

100Hz Optional channels from received CAN messages

MoTeC — Published: 11 February 2014 Page 16

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Motec ADR Manuel d'utilisateur Page 17

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