Impaired operator detection and warning system employing analysis of operator control actions
First Claim
Patent Images
1. An impaired operator detection system comprising:
- a sensing device that provides a measurement of the operator'"'"'s control actions and that generates a signal indicative of said control actions; and
an analyzer comprising a processor which includes,a Fast Fourier Transform processor portion capable of performing a Fast Fourier Transform on said signal and converting the transformed signal into a Power Spectrum Array (PSA) comprising a numeric description of the waveform energy present in each of a chosen series of frequency bands, anda comparison processor portion capable of comparing the PSA derived from said measurement of the operator'"'"'s control actions to at least one empirical PSA created from empirical data indicative of an unimpaired operator.
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Abstract
An impaired operator detection system for detecting impairment of an operator of any equipment, system, or vehicle which requires continuous compensatory tracking, or nulling, of course deviation error. Operator control actions are characterized as a complex sine wave and then a power spectrum array (PSA) analysis is used to characterize this control action data. Statistical techniques are used to predict the level of operator alertness by comparing the analysis results of the operator'"'"'s recent control actions to empirical power spectrum array (PSA) analysis data indicative of an unimpaired operator.
90 Citations
14 Claims
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1. An impaired operator detection system comprising:
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a sensing device that provides a measurement of the operator'"'"'s control actions and that generates a signal indicative of said control actions; and an analyzer comprising a processor which includes, a Fast Fourier Transform processor portion capable of performing a Fast Fourier Transform on said signal and converting the transformed signal into a Power Spectrum Array (PSA) comprising a numeric description of the waveform energy present in each of a chosen series of frequency bands, and a comparison processor portion capable of comparing the PSA derived from said measurement of the operator'"'"'s control actions to at least one empirical PSA created from empirical data indicative of an unimpaired operator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of detecting an impaired operator comprising the steps of:
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(a) measuring the operator'"'"'s control actions; (b) generating a signal indicative of said control actions; (c) processing said signal by performing a Fast Fourier Transform on the signal and converting the transformed signal into a Power Spectrum Array (PSA) comprising a numeric description of the waveform energy present in each of a chosen series of frequency bands; and (d) comparing the PSA derived from said measurement of the operator'"'"'s control actions to at least one empirical PSA created from empirical data indicative of an unimpaired operator. - View Dependent Claims (10, 11, 12, 13, 14)
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Specification