TBS-223 Wireless Vehicle detector
REV 1.0
25
12.
Disclaimer
1.
Battery life:
The battery life refers to the service life under normal conditions. When
the device under a
poor LoRa network (SNR≤
-12), the battery life will be affected and
shortened. The above estimated battery life is based on our calculation for the Joint Mode
at sensitivity level 4 assuming 5 vehicles IN and OUT per day and 2 heart beat per day
where normal conditions mean the device work normally in stable network condition.
2.
Accuracy:
Turbo run an intensive testing with different vehicles to ensure the testing
accuracy is corrected. However, there are too many vehicle types and different material to
build the vehicle. Thus, the sensor accuracy is only being used as a reference ONLY.
Customer need to test the sensor on their own experience before the site deployment.
3.
Standard parking event:
TBS-223 is a thoughtful designed Parking sensor, it is
designed to tackle a standard parking event. Only the vehicle is driven on top of the sensor
and stayed for around 1 second, the sensor will response. It is designed to avoid the long
stay session caused by a long delay in reporting when vehicle left the car spot. However,
there are too many parking situations in the real life which is not under covered by TBS-
223. And there may have chance to have error reporting.
3.
Network Coverage:
TBS-223 required a good signal coverage for operation, even
the design is fine tuned to the best RF performance. Since Vehicle is driven on top of the
sensor where the RF signal was blocked by the vehicle, there will be around 10-15 dB
signal dropped once vehicle on top of sensor. It is recommended to keep the RSSI > -90
and SNR >5 in no vehicle status.
4.
System Time Stamp:
The payload included the system timestamp (UTC) which is the
time in the sensor which was synchronised with the mobile App during installation. Due to
there is potential time shifting in the system clock, the time stamp in the payload is used
as a reference only and provided a reference information for the payload event for the
stored buffer data when there is LoRa network issue.
