Wearable devices are increasingly being used for monitoring health signals and for fitness purposes with typical uses being calorie tracker, workout assistant, and step counter. Even though these wearables can measure many health signals (e.g. heart rate), they are still not perceived as highly accurate, relative to clinical monitoring devices. In this paper, we investigate the accuracy of heart monitor as included in two popular wearables Motorola Moto 360 and the Apple Watch. We analyze the accuracy from a hardware and a software perspective and show the effects of body motion on the heart rate monitors based on the use of photoplethysmography (PPG) signals used in Android wearables. We then do a software reliability study of the Android Wear OS, on which many wearables are based, using fuzz testing.
翻译:用于监测健康信号和健康目的的可穿装置正在越来越多地使用,典型用途是卡路里追踪器、锻炼助理和台阶计。尽管这些可穿装置可以测量许多健康信号(例如心脏率),但与临床监测装置相比,它们仍然不被认为非常准确。在本文中,我们调查了两种流行的可穿装置Motola Moto 360和苹果观察中所包含的心脏监测器的准确性。我们从硬件和软件的角度分析了准确性,并展示了人体运动对心脏速率监测器的影响,其依据是使用在 Android可穿戴装置中使用的光耗成像仪(PPG)信号。然后我们用模糊测试方法对许多可穿戴装置所基于的Android Wear OS 进行软件可靠性研究。