Patent ID: 7783391

Claim:
An apparatus for controlling a vehicle by a teeth clenching motion made by a user comprising: an electromyogram signal obtaining unit including electromyogram sensors disposed at both sides for generating an electromyogram signal according to a predetermined muscle moved when a disabled person clenches teeth, and a ground electrode connected to a body of the disabled persons for providing a reference voltage; and a vehicle driving unit including a control command generating unit for generating a vehicle driving command according to the electromyogram signal by classifying the electromyogram signal based on a side of teeth clenched, a duration time for clenching teeth and a sequence of teeth clenching motions made by the disabled person, a control command interface for generating a predetermined level of voltage according to the created vehicle driving command, and a vehicle driving unit for driving the vehicle according to the generated voltage, wherein the control command generating unit is configured to divide the electromyogram signal by a predetermined time; wherein the control command generating unit is configured to obtain a difference of absolute means value (DAMV) of each channel as feature value from the divided electromyogram signals obtained from two channels by DAMV=1 N−1 .times. i=2 N .times. .times. x .function. (i)−x .function. (i−1), where N denotes the number of samples in each of the divided electromyogram signals and x(i) represents the digital electromyogram signal value at an index i; wherein the control command generating unit is configured to classify the electromyogram signals into four basic patterns by comparing the obtained feature values of the electromyogram signals with a predetermined threshold value, classifying the electromyogram signals into an ON state if the feature value is greater than the predetermined threshold value and classifying the electromyogram signals into an OFF state if the feature value is smaller than the predetermined threshold value; and wherein the control command generating unit is configured to generate the vehicle driving command based on a classified pattern by setting a previous motion of vehicle as a reference value and analyzing the classified pattern based on the reference value.