From: Modern smart device-based concept of sensoric networks
Type and unit | Description |
---|---|
Accelerometer (m/s2) | Motion sensor of three-dimensional X,Y,Z acceleration includes gravity magnitude which is g = 9.81 m/s2 and is expressed by following equitation: |
Acceleration = − g − ∑ F/mass | |
To express pure acceleration, the gravity force must be removed from the data, and the result is basically a linear acceleration | |
From Android 1.5 API 3, from iPhone 3G [18] | |
Temperature (°C) | Environmental sensor of one-dimensional ambient temperature in degree Celsius |
From Android 4.0 API 14 | |
Gravity (m/s2) | Motion sensor of three-dimensional x, y, z vector indicating the direction and magnitude of gravity. The coordinate system is the same as acceleration |
From Android 2.3 API 9 | |
Gyroscope (rad/s) | Motion sensor of three-dimensional x, y, z rotation vector around device’s local axis |
From Android 2.3 API 9, From iPhone 4S | |
Light (lx) | Environmental sensor of one-dimensional ambient light level indicator. |
From Android 1.5 API 3, from iPhone 3G | |
Linear acceleration (m/s2) | Motion sensor of three-dimensional x, y, z linear acceleration vector indicating acceleration along each device axis, not including gravity. The coordinate system is the same within acceleration |
Assume following equation: | |
Acceleration = gravity + linear − acceleration | |
From Android 2.3 API 9 | |
Magnetic field (μT) | Motion sensor of three-dimensional ambient magnetic fields measured in micro-tesla in the x-, y-, z-axis. |
From Android 1.5 API 3, from iPhone 3GS | |
Pressure (hPa) | Environmental sensor of one-dimensional ambient air pressure in hectopascal or millibar units |
From Android 2.3 API 9 | |
Proximity (cm) | Environmental sensor of one-dimensional distance measured in front of the device |
From Android 1.5 API 3, from iPhone 3G | |
Humidity (%) | Environmental sensor of one-dimensional relative ambient air humidity |
From Android 4.0 API 14 | |
Rotation vector (scalar) | Motion sensor of three-dimensional rotation vector expressed by following equation: |
Value = sin(θ/2), where θ is the angle of device that has rotated around a specific axe | |
From Android 2.3 API 9, from iPhone 3G |