Driver seat system and awakening device
First Claim
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1. A driver seat system comprising:
- a monitor for monitoring a human condition of a driver, andan awakening device for making the driver recover a wakeful state or awakening state by starting operation when received a predictive signal for fall-asleep from said monitor, the predictive signal for fall-asleep being a signal when an energy metabolism makes transition from an active state into a sleep state,wherein said awakening device includes a mechanism for stimulating a pressure sense of the driver and wherein said monitor includes a bio-signal measurement instrument for measuring a bio-signal of the driver, and a bio-signal analyzer for analyzing a bio-signal data collected by said bio-signal measurement instrument, said bio-signal analyzer including;
a bio-signal peak value detection means for detecting a peak value for each cycle of an original waveform of the bio-signal data;
a power value calculation means for calculating a difference between the peak value at an upper limit side and the peak value at a lower limit side for each certain time range using respective peak values obtained by said bio-signal peak value detection means to thereby set the difference as a power value;
a gradient calculation means for obtaining a gradient of the power value with regard to time base in a certain time range by performing slide calculation the prescribed number of times at a prescribed overlap rate with regard to the prescribed time;
a comparative determination means for comparatively determining whether a sudden drop state of the gradient of the power value exists or not in time-series change in the gradient of the power value obtained by performing slide calculation with said gradient calculation means to thereby determine a time range in which the sudden drop state appears to be the predictive signal for fall-asleep from the active state into the sleep state; and
an output means for outputting the predictive signal for fall-asleep from the active state to the sleep state detected by said comparative determination means.
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Abstract
There are provided a monitor for monitoring a human condition of a driver, and an awakening device for awakening a driver, which starts operation when received a predictive signal for fall-asleep being a signal for energy metabolism transition from an active state into a sleep state. The awakening device is structured to stimulate a pressure sense of the driver by reclining a seat back of a driver seat forward or rearward to thereby cause a shift force. Accordingly, without regard to an alarm reaction level to an alarm sound, it is possible to stimulate the driver and whereby awaken the driver more surely.
56 Citations
17 Claims
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1. A driver seat system comprising:
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a monitor for monitoring a human condition of a driver, and an awakening device for making the driver recover a wakeful state or awakening state by starting operation when received a predictive signal for fall-asleep from said monitor, the predictive signal for fall-asleep being a signal when an energy metabolism makes transition from an active state into a sleep state, wherein said awakening device includes a mechanism for stimulating a pressure sense of the driver and wherein said monitor includes a bio-signal measurement instrument for measuring a bio-signal of the driver, and a bio-signal analyzer for analyzing a bio-signal data collected by said bio-signal measurement instrument, said bio-signal analyzer including; a bio-signal peak value detection means for detecting a peak value for each cycle of an original waveform of the bio-signal data; a power value calculation means for calculating a difference between the peak value at an upper limit side and the peak value at a lower limit side for each certain time range using respective peak values obtained by said bio-signal peak value detection means to thereby set the difference as a power value; a gradient calculation means for obtaining a gradient of the power value with regard to time base in a certain time range by performing slide calculation the prescribed number of times at a prescribed overlap rate with regard to the prescribed time; a comparative determination means for comparatively determining whether a sudden drop state of the gradient of the power value exists or not in time-series change in the gradient of the power value obtained by performing slide calculation with said gradient calculation means to thereby determine a time range in which the sudden drop state appears to be the predictive signal for fall-asleep from the active state into the sleep state; and an output means for outputting the predictive signal for fall-asleep from the active state to the sleep state detected by said comparative determination means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An awakening device which starts operation when received a predictive signal for fall-asleep for energy metabolism transition from an active state into a sleep state from a monitor for monitoring a human condition of a driver, comprising a mechanism for stimulating a pressure sense of the driver to awaken the driver, wherein said monitor includes a bio-signal measurement instrument for measuring a bio-signal of the driver, and a bio-signal analyzer for analyzing a bio-signal data collected by said bio-signal measurement instrument, said bio-signal analyzer including:
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a bio-signal peak value detection means for detecting a peak value for each cycle of an original waveform of the bio-signal data; a power value calculation means for calculating a difference between the peak value at an upper limit side and the peak value at a lower limit side for each certain time range using respective peak values obtained by said bio-signal peak value detection means to thereby set the difference as a power value; a gradient calculation means for obtaining a gradient of the power value with regard to time base in a certain time range by performing slide calculation the prescribed number of times at a prescribed overlap rate with regard to the prescribed time; a comparative determination means for comparatively determining whether a sudden drop state of the gradient of the power value exists or not in time-series change in the gradient of the power value obtained by performing slide calculation with said gradient calculation means to thereby determine a time range in which the sudden drop state appears to be the predictive signal for fall-asleep from the active state into the sleep state; and an output means for outputting the predictive signal for fall-asleep from the active state to the sleep state detected by said comparative determination means. - View Dependent Claims (16, 17)
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Specification