Alcohol-drinking detecting system and computer program

• US 9,149,231 B2
• Filed: 05/18/2010
• Issued: 10/06/2015
• Est. Priority Date: 05/19/2009
• Status: Active Grant

• Current Assignee: Delta Tooling Co., Ltd.
• Original Assignee: Delta Tooling Co., Ltd.
• Inventors: Fujita, Etsunori, Ogura, Yumi, Maeda, Shinichiro, Kojima, Shigeyuki
• Primary Examiner(s): Natnithithadha, Navin
• Assistant Examiner(s): WEARE, MEREDITH H
• Application Number:
  US13/321,367
• Publication Number:
  US 20120130261A1
• Time in Patent Office: 1,967 Days
• Field of Search: 600500-509
• US Class Current: 1/1
• CPC Class Codes: A61B 2503/22 Motor vehicles operators, e.g. drivers, pilots, captains
• CPC Class Codes: A61B 2562/168 Fluid filled sensor housings
• CPC Class Codes: A61B 5/02444 Details of sensor A61B5/02427 takes precedence
• CPC Class Codes: A61B 5/1102 Ballistocardiography
• CPC Class Codes: A61B 5/4845 Toxicology, e.g. by detection of alcohol, drug or toxic products A61B5/4848 takes precedence
• CPC Class Codes: A61B 5/6887 mounted on external non-worn devices, e.g. non-medical devices
• CPC Class Codes: A61B 5/6892 Mats
• CPC Class Codes: B60W 2540/24 Drug level, e.g. alcohol

Abstract

Determination about presence/absence of alcohol in the body is made accurately.

A frequency dynamic information processing means 610 which obtains a tendency of time-series fluctuation regarding a frequency of a pulse wave of a back portion of a person detected by an air pack and an alcohol-drinking determining means 650 which determines an alcohol-drinking state when a tendency of a time-series fluctuation regarding the frequency obtained by the frequency dynamic information processing means 610 is separated from a tendency of time-series fluctuation regarding the frequency at a non-drinking state are provided. Since determination about whether or not a person is in an alcohol-drinking state is made according to comparison with time-series fluctuation regarding the frequency at a non-drinking time, where the determination is made using not only frequency analysis of the frequency of a pulse wave changing according to the physical condition of the person but also the time-series fluctuation thereof, determination about presence/absence of alcohol drinking can be made more accurately as compared with the conventional method.

Claims

1. An alcohol-drinking detecting system to analyze a biological signal obtained from an upper body of a person by a biological signal measuring device to estimate presence/absence of alcohol in the body, the alcohol-drinking detecting system comprising:

circuitry configured to;

obtain, from a time-series waveform of the biological signal, a time-series fluctuation regarding a frequency of the time series-waveform; and

determine an alcohol-drinking state when a tendency of the time-series fluctuation regarding the frequency obtained from the circuitry is separated from a tendency of a time-series fluctuation regarding the frequency at a non-drinking time,

obtain a time-series waveform of a frequency in the time-series waveform of the biological signal;

perform moving calculation for obtaining, in the time-series waveform of the frequency of the biological signal obtained by the circuitry, a slope of the frequency for each of predetermined time windows set in a predetermined overlapping time to output a time-series change of the slope of the frequency obtained for each time window as a frequency slope time-series waveform;

determine the alcohol-drinking state according to whether or not, regarding a difference of an integral value of a positive slope and a difference of an integral value of a negative slope obtained by dividing the frequency slope time-series waveform into the positive slope and the negative slope to integrate the respective positive and negative slopes and comparing integral values of the positive slope and the negative slope with those in a normal state before alcohol drinking, the difference of the integral value of the positive slope decreases to a predetermined difference or more and the difference of the integral value of the negative slope increases to a predetermined difference or more; and

output the alcohol-drinking state as determined by the circuitry.

2. An alcohol-drinking detecting system to analyze a biological signal obtained from an upper body of a person by a biological signal measuring device to estimate presence/absence of alcohol in the body, the alcohol-drinking detecting system comprising:

circuitry configured to;

obtain, from a time-series waveform of the biological signal, a time-series fluctuation regarding a frequency of the time series-waveform; and

determine an alcohol-drinking state when a tendency of the time-series fluctuation regarding the frequency obtained from the circuitry is separated from a tendency of a time-series fluctuation regarding the frequency at a non-drinking time,

obtain a time-series waveform of a frequency in the time-series waveform of the biological signal;

perform moving calculation for obtaining, in the time-series waveform of the frequency of the biological signal obtained by the circuitry, an average value of the frequency for each of predetermined time windows set in a predetermined overlapping time to output a time-series change of the average value of the frequency obtained for each time window as a frequency fluctuation time-series waveform;

perform moving calculation for obtaining, in the time-series waveform of the frequency of the biological signal obtained by the circuitry, a slope of the frequency for each of predetermined time windows set in a predetermined overlapping time to output a time-series change of a slope of the frequency obtained for each time window as a frequency slope time-series waveform;

determine the alcohol-drinking state according to whether or not a base line position of the frequency fluctuation time-series waveform is higher than that at a non-drinking state and whether or not, regarding a difference of an integral value of a positive slope and a difference of an integral value of a negative slope obtained by dividing the frequency slope time-series waveform into the positive slope and the negative slope to integrate the respective positive and negative slopes and comparing the integral values of the positive slope and the negative slope with those in a normal state before alcohol drinking, the difference of the integral value of the positive slope decreases to a predetermined difference or more and the difference of the integral value of the negative slope increases to a predetermined difference or more; and

output the alcohol-drinking state as determined by the circuitry.

3. A non-transitory computer readable medium including executable instructions, which when executed by circuitry cause the circuitry to execute an alcohol-drinking analyzing and estimating process to analyze a biological signal obtained from an upper body of a person by a biological signal measuring device to estimate presence/absence of alcohol in the body, the alcohol-drinking analyzing and estimating process comprising:

obtaining, from a time-series waveform of the biological signal, a time-series fluctuation regarding a frequency of the time series-waveform;

determining an alcohol-drinking state when a tendency of the time-series fluctuation regarding the frequency obtained by the obtaining is separated from a tendency of a time-series fluctuation regarding the frequency at a non-drinking time;

obtaining a time-series waveform of a frequency in the time-series waveform of the biological signal;

performing moving calculation for obtaining, in the time-series waveform of a frequency of the biological signal, a slope of the frequency for each of predetermined time windows set in a predetermined overlapping time to output a time-series change of the slope of the frequency obtained for each time window as a frequency slope time-series waveform;

determining the alcohol-drinking state according to whether or not, regarding a difference of an integral value of a positive slope and a difference of an integral value of a negative slope obtained by dividing the frequency slope time-series waveform into the positive slope and the negative slope to integrate the respective positive and negative slopes and comparing integral values of the positive slope and the negative slope with those in a normal state before alcohol drinking, the difference of the integral value of the positive slope decreases to a predetermined difference or more and the difference of the integral value of the negative slope increases to a predetermined difference or more; and

outputting the alcohol-drinking state as determined by the circuitry.

4. A non-transitory computer readable medium including executable instructions, which when executed by circuitry cause the circuitry to execute an alcohol-drinking analyzing and estimating process to analyze a biological signal obtained from an upper body of a person by a biological signal measuring device to estimate presence/absence of alcohol in the body, the alcohol-drinking analyzing and estimating process comprising:

obtaining, from a time-series waveform of the biological signal, a time-series fluctuation regarding a frequency of the time series-waveform;

determining an alcohol-drinking state when a tendency of the time-series fluctuation regarding the frequency obtained by the obtaining is separated from a tendency of a time-series fluctuation regarding the frequency at a non-drinking time;

obtaining a time-series waveform of a frequency in the time-series waveform of the biological signal;

performing moving calculation for obtaining, in the time-series waveform of a frequency of the biological signal, an average value of the frequency for each of predetermined time windows set in a predetermined overlapping time to output a time-series change of the average value of the frequency obtained for each time window as a frequency fluctuation time-series waveform;

performing moving calculation for obtaining, in the time-series waveform of the frequency of the biological signal, a slope of the frequency for each of predetermined time windows set in a predetermined overlapping time to output a time-series change of a slope of the frequency obtained for each time window as a frequency slope time-series waveform;

determining the alcohol-drinking state according to whether or not a base line position of the frequency fluctuation time-series waveform is higher than that at a non-drinking state and whether or not, regarding a difference of an integral value of a positive slope and a difference of an integral value of a negative slope obtained by dividing the frequency slope time-series waveform into the positive slope and the negative slope to integrate the respective positive and negative slopes and comparing the integral values of the positive slope and the negative slope with those in a normal state before alcohol drinking, the difference of the integral value of the positive slope decreases to a predetermined difference or more and the difference of the integral value of the negative slope increases to a predetermined difference or more; and

outputting the alcohol-drinking state as determined by the circuitry.