Or we can get these information from which documents?
2. Sensor HUB device is windows 8.1 system requirements?
你好，
从开发的角度来看，Sensor一般是指Accelerometer、Gyrometer、Compass、Sensor Fusion和Location Sensor，Sensor Fusion是指传感信息的融合。其实还包含了ambient light sensors，用于检测环境光强度。
具体请参考下面两个文档：
1. MSDN Blogs：Supporting sensors in Windows 8
2. Dev Center: Introduction to the Sensor and Location Platform in Windows
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