Description |
1. |
General description
WU is a sensor placed in the tire that reports pressure and temperature.
The WU is mounted inside the wheels, fixed to the valve. The angle between the valve and the housing of the WU is variable.
This allows adaptation to various types of rims.
The Wheel Unit is made of a PCB supporting the electronic
hardware and encapsulated inside a housing which is potted with
polyurethane.
It is self-powered by a battery and includes all systems for
parameter measurement (pressure, temperature and centrifugal
acceleration and optionally rotation direction), RF transmission and LF
detection.
To achieve the specified battery lifetime, the WU supports
various measurement and transmission timings, depending on WU operation
mode.
For RF transmission, WU uses an internal antenna. |
2. |
First Block Mode
: When vehicle start driving, Sensor enter Mode First Block.
Typical period of RF emissions is 16 sec. for 40 times for Auto-learning and Auto-location function. |
3. |
Driving Mode
: After 19 min. parking and then finishing Mode First Block mode, WU enter Driving mode.
Typical period of RF emissions are 64 sec above 4g vehicle speed. |
4. |
Parking Mode
: at below 3g Vehicle speed, enter Parking mode.
Typical periodicities of RF emissions are 13 hours. |
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