Range Rover P38
87
NAVIGATION SYSTEM
NEW RANGE ROVER
14
DESCRIPTION AND OPERATION
Peizo Gyro Sensor
1. Driver elements
2. Retaining element
3. Amplifier
4. Phase detector
5. Frequency filter
6. Navigation computer
7. Driver stage
The sensor is supplied with a current from a driver.
The driver is used to induce vibrations in the driver
elements and retaining elements. As the vehicle turns
a corner, i.e.; a left hand bend, the rotational motion is
detected by the retaining elements, caused by the
Coriolis force, and a small electrical voltage is
produced.
The voltage is passed to an amplifier and the
amplified signal is then passed to a phase detector.
The phase detector establishes the direction of
rotation and passes a signal to a frequency filter.
Because the gyro sensor is subject to vibrations
produced by means other than cornering, the
frequency filter analyses the signals and removes
signals not produced by cornering forces. The filtered
signal is passed from the frequency filter to the
navigation computer which uses it to calculate
direction of travel.
