| 摘要 |
<p>PURPOSE:To improve the measuring information of a pulse wave detection by comparing a detected pulse wave signal with a value determined in advance by a pulse wave comparing means, and informing whether it has a sufficient signal level as a pulse wave signal or not to a measurer by a comparison result display means. CONSTITUTION:A signal detected by a pulse wave detecting means 2 is charged to a peak value charging capacitor C1 through a voltage follower 14, and inputted to a + terminal of a comparator 12 through a voltage follower 13. On the other hand, to a - terminal of the comparator 12, a set reference voltage set in advance is applied, and an output of the comparator 12 is inverted to a + side, when a peak value of the signal detected by the pulse wave detecting means 2 is higher than the set voltage value, and inputted to a comparison result display means 5, and whether the detecting signal is a pulse wave signal or not is informed to a measurer.</p> |
