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Template:FMB640 Accelerometer Features settings (view source)
Revision as of 13:18, 14 June 2021
, 13:18, 14 June 2021→Crash Detection
==Crash Detection==
==Crash Detection==
[[Image:Fmb640_crash.png|250px|right]]
{{{pic_crash|[[Image:Fmb640_crash.png|250px|right]]}}}
The scenario is activated when Crash is detected by the device using acceleration values.
Crash Detection functionality can be set according to these settings:
Crash Detection functionality can be set according to these settings:
1. Threshold (mg)
1. Threshold (mg)
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 an accident happens and FMB640 detects an acceleration value higher than the set threshold value during the set time period, then the device will generate an event. Threshold and duration values are set depending on the accident power that you want to detect. FMB640 can detect a slight tapping on the device (Threshold=100mg, Duration=1ms) or can detect severe accidents (Threshold=4000mg, Duration=5ms).
''Crash trace functionality'' <br>
''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>
Crash trace functionality collects accelerometer, GNSS data if configured. Collected data holds 10 seconds of information. The output data rate for the crash trace is 50 Hz and it is not configurable <br>
0. Disabled, <br>
0. Disabled, <br>
1. Trace Changes(Enable). <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.
*FMB will collect acceleration data for configured trace duration. Every second Acceleration changed more than> 50mG Data will be collected and records generated. If Acceleration does not change, the trace will save records with a 1second period.
2. Trace Full. <br>
2. Trace Full. <br>
*It doesnt matter if axis changed more then >50mG or not all values will be added in buffer.
*It doesn't matter if the axis changed more than>50mG or not all values will be added in the buffer.
''Crash trace data structure'' <br>
''Crash trace data structure'' <br>
Data is packed different in Codec 8 and Codec 8E protocols. <br>
Data is packed differently 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.
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.