Doc. Title
Author
Page of Pages
ST4300 OPERATION MANUAL
SE PARK
11 of 13
Concerning
Doc. No.
Rev.
Date
Features and How to set parameters
1.01
27 NOV 2016
Suntech International Ltd.
Confidential Document
3-7. Motion Sensor
<About How to activate Motion Sensor>
- Ignition ON (Driving)
The sensor mode goes to collision detection mode. So, if the vehicle has a car accident, the accident may bring
about a big impact of which value is higher than that of the specified collision threshold (COLL_THRES). In this
case the device will be reporting a collision message to the server.
After a collision is made against the vehicle, the sensor will be disabled for a while (30 seconds) so as to avoid
sending to the server the same message as the first one repeatedly.
- Ignition OFF (Parking)
‘Ignition Off ‘situation means that the vehicle is in state of parking and that the sensor goes to ‘parking mode’(shock
or movement detection mode).
In this situation, if there is a shock made on the vehicle by somebody, the device will report a shock message to the
server. The device will also exit from the power down mode if the device has been in power down mode.
After triggering an event such as a shock or a movement, the sensor will be disabled for a while (for 30 seconds)
so as to avoid sending to the server the same message as the first one repeatedly.
<About Threshold>
- Collision Threshold
Our recommendation is 0.7 but it is only for reference value obtained from our field testing made on real vehicles
(nearby gear).The value may vary in a real situation depending upon driving manner or condition of road. So, you
need to check this value.
- Shock Threshold
Our recommendation is 0.04 but it is only for reference value obtained from our field testing made on real vehicles
(nearby gear).Motion sensor is installed on an inside part of the vehicle’s body to measure sensitivity value(s)
created by vibration and shock impact given to the vehicle. Value of this sensitivity varies because it depends on
what body part of the vehicle the motion sensor is installed.
Shock Threshold is also used for checking movement of vehicle. So, the device may not be able to recognize if a
shock threshold value is too high. You need to consider these kinds of factors measurable under realistic
environment when you also adjust the values.
State
Detection
Exit from Power down
Reporting about:
Motion
Shock
Collision Motion
Shock Collision Motion
Shock
Collision
Parking
ON
Enable
X
Exit
Exit
Exit
X
Enable
X
Driving
OFF
OFF
Enable
X
X
X
X
X
Enable
<Notes>
ON: Activation.
OFF: Deactivation.
Enable: Enable or Disable by setting.
X: Please, do not care.