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information.
3.3 Emergency Rescue
Rollover alarm: if vehicle rolls over during driving (three-axis acceleration sensor detects that rollover degree is
more than 60°), device will send alarm and make emergency rescue call.
Impact alarm: if vehicle impacts during driving (three-axis acceleration sensor detects that acceleration is more
than 19.6 m/s²), device will send alarm and make emergency rescue call.
Smart phone APP dose not distinguish rollover alarm and impact alarm, both are considered as emergency
alarm.
If there is impact or rollover during sleeping, device will wake up and send alarm after being online. If there is
impact or rollover during working, device will send alarm immediately.
3.4 Device Status
Device indicators status: when device gets power at first time, three indicators will blink at same time and then
turn off. The yellow and red indicators will blink after that, which means initialization has been finished. The
yellow is online indicator, quick blinking means offline, slow blinking means online. The red is positioning
indicator, quick blinking means not fixed position, and slow blinking means fixed position.
Device status query: when device is online, user can query status by smart phone APP, can obtain detailed
working status and know current working status.
Uploading contents: device ID, protection status, online status, status update time, communication signal
strength, satellites positioning status, accelerator sensor status, bus connection status, device firmware
version, module version and runtime etc.
Device sleeping: if device starts at first time, device will keep online until device sleep after fixing position. If
device does not fix position in 25 minutes, it will sleep soon. If device has already fixed position, it will sleep in 2
minutes. Device will wake up 1 time every 1 hour during sleeping, and then sleep again after 200 seconds.
3.5 Mileage and Fuel Consumption Collection
Mileage collection: device can collect GPS speed and meter speed to calculate interval mileage and send to
platform. Platform works out total mileage according to interval mileages.
Fuel consumption collecting: device can connect BUS to collect interval fuel consumption data and send to
platform. Platform works out total fuel consumption according to interval fuel consumption data, and make
various fuel consumption diagrams.
3.6 Driving Behavior Optimizing
Device can collect harsh acceleration, harsh deceleration, high engine revolution times, mismatch between
