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TM
LG-Alert
Ver 1.06
Lateral Acceleration Indicator
Owner's Manual
INTRODUCTION
TM
The LG-Alert
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
TM
The heart of the LG-Alert
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
.
_________________________________________________________________________________________________________
Stability Dynamics Ltd. 04/04/06
"U.S. Patent 6,130,608"
Page 1
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Summary of Contents for Stability Dynamics LG-Alert
- Page 1 ‘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 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.
- Page 2 A tilt table can be used to establish a safe setting for the LG-Alert . The relationship between digital setting and full-scale sensitivity are shown in the setup table. Alternatively the device can be set by an experienced driver and tested under actual vehicle operating conditions to determine a conservative setting for the device.
- Page 3 There is a warm-up period of about 10-20 seconds where the device may display an imbalance. During installation the device can be tested for functionality by attaching cables and rotating the base module as shown. Power LG-Alert Base Module _________________________________________________________________________________________________________ Stability Dynamics Ltd. 04/04/06 “U.S. Patent 6,130,608” Page 3...
- Page 4 Rear View Base Unit Fuse 12 VDC From Battery DB9 connector to Display Lateral Signal Output Jack Lateral Zero Adjust Auxiliary Horn Jack Axial Signal Output Jack Vertical Signal Output Jack _________________________________________________________________________________________________________ Stability Dynamics Ltd. 04/04/06 “U.S. Patent 6,130,608” Page 4...
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Page 5: Trouble Shooting
Abnormal supply voltage fluctuations caused by faulty equipment or loose wires may cause the highly sensitive amplifier circuits to give a false reading or appear unbalanced. _________________________________________________________________________________________________________ Stability Dynamics Ltd. 04/04/06 “U.S. Patent 6,130,608” Page 5... - Page 6 The auxiliary horn jack found on the rear of the base unit is not disabled by this procedure. To disable the auxiliary horn it must be unplugged from the base unit. _________________________________________________________________________________________________________ Stability Dynamics Ltd. 04/04/06 “U.S. Patent 6,130,608” Page 6...
- Page 7 A routine inspection of the device setting and operation should be included in the short test drive undertaken at the beginning of each shift. The self-test button can be pressed to ensure the device is fully operational. The relationship between LG-Alert digital setting and the associated ‘g’...
- Page 8 Ver 1.06 Lateral Acceleration Indicator Owner’s Manual LIMITATIONS OF THE LG-Alert This device is intended as an early alert system to assist drivers in recognizing when they are approaching maneuvering limits that are potentially unstable. While this device can provide invaluable information to the operator of the vehicle, it must be recognized that the LG-Alert has limitations.
- Page 9 No manufacturer, agent, representative, dealer or employee of the company has the authority to increase or alter obligations or limitations of this warranty. This warranty is limited to the repair or replacement of the LG-Alert Lateral Acceleration Indicator, at the Company’s option, in situations where this unit is found to be defective in materials and/or workmanship in normal vehicle use.
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