LG-Alert
TM
Ver 1.06 Lateral Acceleration Indicator Owner’s Manual
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Stability Dynamics Ltd. 04/04/06 “U.S. Patent 6,130,608” Page 1
INTRODUCTION
The LG-Alert
TM
Lateral Acceleration Indicator is intended for use as an early alert system to
assist drivers in recognizing when they are exceeding set maximum maneuvering limits of the
vehicle. This device monitors and displays lateral “g” forces perpendicular to the vehicle
direction of travel in real time. The lateral sensitivity of the device can be adjusted using the
digital push buttons on the front of the base unit. ‘00’ is least sensitive and ‘99’ is most
sensitive. An auxiliary horn jack provides an additional signal indicating the full scale of the
device has been exceeded. Signal output jacks provide voltages biased at +2.5 VDC
proportional to applied ‘g’s for data logging or trip recording applications. Internal filtering
reduces the effects of high frequency accelerations associated with bumps and
vibration.
OPERATING PRINCIPLE
The heart of the LG-Alert
TM
Lateral Acceleration Indicator is a complete acceleration
measurement system contained in a hermetically sealed monolithic IC. The signal conditioning
circuitry incorporates a force-balance control loop and bias adjustment to center the signal about
zero. This provides a bi-polar voltage proportional to the applied “g” force. The absolute value
of the lateral signal is determined and outputted to the display module. Internal temperature
regulation of sensitive IC’s virtually eliminates error associated with changes in surrounding
temperature. The device can be set to display a full scale lateral acceleration range of between
0.17 and 1 “g” force
.
