Fuzzy logic based vehicle collision avoidance warning device
First Claim
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1. A vehicle collision avoidance warning device, comprising:
- a sensing module for detecting an engine RPM, a fuel throttle index, a vehicle speed, a relative distance;
a fuzzy logic controller coupled to the sensing module for receiving and according to the engine RPM, the fuel throttle index, the vehicle speed, and the relative distance to deduce a safety distance using fuzzy logic; and
a safety warning device coupled to the fuzzy logic controller and the sensing module for comparing the distance and the safety distance and generate a warning signal according to a comparison result.
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Abstract
A vehicle collision avoidance warning device comprising a sensing module for detecting engine RPM, fuel throttle depress level, vehicle speed, and relative distance; a fuzzy logic controller coupled to the sensing module for receiving the engine RPM, throttle index, vehicle speed, and relative distance and generating a safety distance value using fuzzy logic; a safety warning device coupled to the fuzzy logic controller and the sensing module for comparing the distance with the safety distance and outputting a warning signal according to the comparison result.
20 Citations
6 Claims
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1. A vehicle collision avoidance warning device, comprising:
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a sensing module for detecting an engine RPM, a fuel throttle index, a vehicle speed, a relative distance;
a fuzzy logic controller coupled to the sensing module for receiving and according to the engine RPM, the fuel throttle index, the vehicle speed, and the relative distance to deduce a safety distance using fuzzy logic; and
a safety warning device coupled to the fuzzy logic controller and the sensing module for comparing the distance and the safety distance and generate a warning signal according to a comparison result. - View Dependent Claims (2, 3, 4, 5, 6)
an engine RPM sensing device for detecting the engine RPM of a vehicle;
a fuel throttle sensing device for detecting a throttle depress level and output the throttle index;
a vehicle speed sensing device for detecting the vehicle speed; and
a distance sensing device for measuring the relative distance.
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3. The warning device in claim 2, wherein the distance sensing device further comprises a filter coupled to the distance sensing device for filtering out interference of signal of the distance.
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4. The warning device in claim 1, wherein the fuzzy logic controller, further comprising:
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a differentiator for receiving a signal of the distance and differentiate to obtain a distance variation over time;
an adjusting factor fuzzy logic inference module for receiving the engine RPM, the throttle index, and the vehicle speed and deducing an adjusting factor using fuzzy logic;
a safety distance fuzzy logic inference module coupled to the differentiator for receiving the vehicle speed and an output of the differentiator and generating a deduced safety distance using fuzzy logic; and
a multiplier coupled to the adjusting factor fuzzy logic inference module and the safety distance fuzzy logic inference module for multiplying the adjusting factor by the deduced safety distance to generate a safety distance value.
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5. The method in claim 4, wherein the adjusting factor fuzzy logic inference module further comprises:
- obtaining an adjusting factor using fuzzy logic according to the engine RPM, the fuel throttle, and the vehicle speed; and
wherein the safety distance fuzzy logic inference module comprising obtaining a deduced safety distance using fuzzy logic according to the vehicle speed and a variation of the distance over time.
- obtaining an adjusting factor using fuzzy logic according to the engine RPM, the fuel throttle, and the vehicle speed; and
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6. The warning device in claim 4, wherein the safety warning device further comprises:
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outputting the safety warning signal as a danger signal when the distance is less than the safety distance value;
determining if the distance is greater than a predefined value when the distance is greater than the safety distance value;
outputting the safety warning signal as a safe signal when the distance is greater than the predefined value; and
outputting the safety warning signal as a caution signal when the distance is smaller than the predefined value.
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Specification