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Most IBM (and some Dell) laptops have built-in accelerometers to stop any moving parts during a sudden fall, but I was unable to find a standardised Windows API to access this data. I assume that each manufacturer would provide a driver to interface with the sensor.
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Yes, they have. accelerometers in laptops protect hard drives from damage. If the laptop were to suddenly drop while in use, the accelerometer would detect the sudden free fall and immediately turn off the hard drive to avoid hitting the reading heads into the hard drive platter.
The Sensor APIs are a set of interfaces built to a common design that expose device sensors in a consistent way to the web platform.
"Surface has four sensors (compass, ambient light sensor, accelerometer, and gyroscope) that apps can use to do cool things." Was this reply helpful?
The gravity, linear acceleration, rotation vector, significant motion, step counter, and step detector sensors are either hardware-based or software-based. The accelerometer and gyroscope sensors are always hardware-based.
Most reputable notebook vendors have accelerometers to park the hard drive head if the notebook is accidentally dropped or is abruptly impacted by another object (i.e. when a certain acceleration threshold is exceeded). For example, my HP has its "HP 3D DriveGuard". However this technology is embedded low-level, it seems to work even if the OS is not loaded, so I suppose it is in the BIOS. I suppose that it is exposed just an ACPI way to enable or disable this technology. So, even on Windows 7 with standardized sensor APIs it is not accessible as a standard accelerometer like in a smartphone. Maybe in future if market demands it (but I don't think so).
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