Tow detection function (unauthorized movement) is available in many automobile GPS/GLONASS trackers. Work of the function is based on the movement sensor which is built in a GPS tracker. After ignition switching off, the sensor passes into an operating mode and continuously analyzes vibrations of a car. If the device registers a hit, an inclination or a movement, a notification about that is immediately sent to the data-center. A user can set notification about an “Unauthorized movement” event per Email or SMS.
To configure this function in the “Devices” application there is a particular portlet. It allows you to set the sensitivity of the sensor (accelerometer) and to configure other parameters:
- The sensitivity of the motion sensor
Having chosen a threshold of operation of the accelerometer, you can adjust it to react even to light hits and rockings. If usage of a car leads to false reactions of the sensor, you can roughen its sensitivity.
- Motion power
Determined by duration of the impact (shock) ranging from 0.1 to 1 second. Recommended value 0.3 seconds.
- Delayed control start
Specify how much time has to pass after switching off of the ignition, before function of control of unauthorized movement starts working. Usually if you set the value of 3-5 minutes it is enough to leave a car and to close a door.
- Duration of the vibration
If you assume that in a place of a parking of a car casual vibrations are possible, specify the minimum duration – there will be no reaction to tremors and shakings that last less than the specified value.
- Vibration interval
The interval at which device will repeat message if unauthorized movement continues. Recommended 5 minutes.
- Return to rest time
Time to determine the state of rest. If during this time interval there is no movement, transition to a state of rest will be fixed. Recommended value of 30 seconds.
The parameters described above allow to adjust the tow detector for the majority of life situations. However, for special equipment and unusual cases even more specified settings are provided, if necessary our support team will help you to fulfill them.