Back to results
US 2003/0201877 A1Published application
Blind spot alert system
OwnerSandra Whittedinventor
Life of this patent
Estimating the term…
Abstract
A vehicle alert system (100) alerts a driver of a vehicle about objects within a predetermined distance from the vehicle. The vehicle alert system (100) has at least two sensors (102) that detect objects within a predetermined distance of the sensor using light and changes in light. When an object is detected near the vehicle, an amplifier (104) activates an alarm circuit (107) to alert the driver that the blind spot is obstructed.
Claims7
A vehicle alert system that is mounted in a vehicle comprising:
- at least two sensors for detecting changes in ambient light within a predetermined distance from the sensor;
- an amplifier coupled to the at least two sensors for receiving an indication from the at least two sensors relating to changes in light that are sensed by the at least two sensors;
- and
- an alarm coupled to the amplifier to be activated by the amplifier in response to the indication from the at least two sensors.
1 more element
A vehicle alert system that is mounted in a vehicle comprising:
- a first photoresistor connected to a first power supply voltage;
- a second photoresistor connected to the first photoresistor and connected to a second power supply voltage;
- an operational amplifier having a first input, a second input and an output, wherein the first input is connected to a node that connects the first photoresistor to the second photoresistor, the second input is connected to a resistor, and the output is coupled to an alarm circuit element;
- and
- a fresnel lens mounted adjacent the first photoresistor and the second photoresistor;
- wherein the resistor has a value of resistance such that selective changes in ambient light detected by the first photoresistor and the second photoresistor cause the operational amplifier to activate the alarm circuit element to generate an alarm.
3 more elements
Dependencies are inferred from the claim text.