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Template:FMB640 Accelerometer Features settings (view source)
Revision as of 08:47, 11 July 2019
, 08:47, 11 July 2019→Crash Detection
2. Duration (ms)
2. Duration (ms)
If accident happens and FMB640 detects acceleration value higher than set threshold value during set time period, then device will generate an event. Threshold and duration values are set depending of accident power which you want to detect. FMB640 can detect a slight tapping on the device (Threshold=100mg, Duration=1ms) or can detect severe accident (Threshold=4000mg, Duration=5ms).
If accident happens and FMB640 detects acceleration value higher than set threshold value during set time period, then device will generate an event. Threshold and duration values are set depending of accident power which you want to detect. FMB640 can detect a slight tapping on the device (Threshold=100mg, Duration=1ms) or can detect severe accident (Threshold=4000mg, Duration=5ms).
''Crash trace functionality'' <br>
Crash trace functionality collects accelerometer, GNSS data if configured. Collected data holds 10 seconds of information. Output data rate for crash trace is 50 Hz and it is not configurable <br>
0. Disabled, <br>
1. Trace Changes(Enable). <br>
* FMB will collect acceleration data for configured trace duration. Every second Acceleration changed more then > 50mG Data will be collected and records generated. If Acceleration does not change, trace will save records with 1second period.
2. Trace Full. <br>
* It doesnt matter if axis changed more then >50mG or not all values will be added in buffer.
''Crash trace data structure'' <br>
Data is packed different in Codec 8 and Codec 8E protocols. <br>
Then CODEC8 is being used device will save IO records with 4 elements. Each sample will contain sample data. This means that 500 records will be created to reflect 10 s of data then ODR is 50 Hz. <br>
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