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    • 2. 发明专利
    • Blood pressure estimation apparatus
    • JP5521906B2
    • 2014-06-18
    • JP2010192454
    • 2010-08-30
    • 株式会社デンソー
    • 光本  直樹幸樹 二ツ山剛 中川
    • A61B5/022A61B5/0205A61B5/0245A61B5/0452
    • PROBLEM TO BE SOLVED: To provide a blood pressure estimation device which can perform highly precise blood pressure estimation.SOLUTION: A digital computing unit 16 uses a pulse wave signal and an electrocardiogram signal to estimate blood pressure. Further, the quality value q1 of the pulse wave signal and the quality value q2 of the electrocardiogram signal are computed to determine whether a sensor signal is good or not based on the quality values q1, q2. Moreover, the correlation value of noises of the respective sensor signals is calculated from a cross-correlation function, and whether the noises of the pulse wave signal are living body-originated or contact-originated is determined from the noise correlation value. Then, when all of the sensor signals are good and when all of the sensor signals are bad and the correlation value of noise is higher than a predetermined value, a blood pressure quality flag is put up. When the blood pressure quality flag is put up, a blood pressure value estimated by a blood pressure estimation logic 24 is stored. When a predetermined number of times of estimated blood pressure values are received, the average value of stored blood pressure values is calculated.
    • 3. 发明专利
    • Biometric information detection system
    • JP5375747B2
    • 2013-12-25
    • JP2010131213
    • 2010-06-08
    • 株式会社デンソー
    • 達也 池上克昌 西井剛 中川幸樹 二ツ山
    • A61B5/0245B62D1/04
    • PROBLEM TO BE SOLVED: To provide a biological information detection system capable of reducing the effect of ambient light. SOLUTION: A biological information detection system 1 includes measurement devices 13 that are arranged in a steering wheel 11 and acquire biological signals from a vehicle driver 5, and a controller 25 that analyzes the acquired biological signals to generate biological information. The measurement devices 13 is provided with a pulse wave sensor 35 comprising an illuminator 31 and a detector 33, both being arranged adjacent to each other. The illuminator 31 irradiates with light a hand or a finger of a subject holding the steering wheel 11. The detector 33 receives light irradiated from the illuminator 31 and reflecting on the hand or the finger, and acquires a light reception signal to output it to the controller 25. The controller 25 checks the position of the pulse wave sensor 35 varying according to the rotation of the steering wheel 11, and generates the biological information based on the light reception signal from the pulse wave sensor 35 positioned below a predetermined horizontal plane. COPYRIGHT: (C)2012,JPO&INPIT