PROBLEM TO BE SOLVED: To accurately measure the amount of moisture in the skin, even when the degree of contact between the skin and a sensor, differs every time of measurement.SOLUTION: A biological information measurement instrument for measuring an amount of moisture of the skin includes a sensor which has electrodes formed on a substrate and measures a charge amount of the skin in contact with the electrodes. An AC signal is applied to the sensor. A charge amount measured by the sensor after the electrodes are in contact with the skin until they separate is successively stored every fixed period of time to calculate a total amount of the charge measured by adding the stored charge amount. The calculated total amount of charge is divided by a time of measurement to calculate an average charge amount per unit time. On the basis of the average charge amount, the amount of moisture of the skin is calculated.COPYRIGHT: (C)2011,JPO&INPIT【課題】計測毎に皮膚とセンサの接触の程度が異なるような場合であっても正確に皮膚の水分量を測定する。【解決手段】皮膚の水分量を測定するための生体情報計測器において、基板の上に形成した電極を有し、当該電極に接触した皮膚の電荷量を計測するセンサを備える。前記センサに交流信号を印加する。前記センサが前記電極に前記皮膚が接触してから離れるまでの間に計測した電荷量を一定時間毎に順次保存し、当該保存した電荷量を加算することにより計測した前記電荷量の合計量を算出する。算出した前記電荷量の合計量を、計測時間で除して単位時間あたりの平均電荷量を算出する。前記平均電荷量に基づいて、前記皮膚の水分量を算出する。【選択図】図1
