【摘要】 本文介绍一种便携式数字心率计,它由单电源供电,结构简单,体积小。心率测量范围为30～199次/分,精度为2％。更多还原

【Abstract】 A kind of portable heart rate meter with digital display is presented. The meter, driven by a single power source, has simple structure and small volume. Its measuring range is from 30 to 199 bpm (beats per minute) with an accuracy of about two percents.更多还原