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About the Author: engineerguy


  1. The accelerometer is used inside a car to detect the sudden impact or stop caused by an accident and then used to fire the airbags. More modern and advanced cars use several to detect where the impact came from and can tell the difference between hitting a wall dead on or getting hit in the side of the car. This can then change which airbags are triggered first.

  2. ask the average smart phone user how their phone knows up from down, and they will tell you it is magic, some will say black magic and others will say white magic, and some wouldn't care because their smart phone is much smarter then they are.

  3. The MEMS Gyroscope is even more interesting than the MEMS accelerometer. The MEMS gyroscope can't replace the accelerometer but works using similar ideas plus the addition of the Coriolis effect and a more complex design, if it's a 3-axis. The Coriolis effect is simple concept once fully understood but can be difficult to do so. It's a brain buster but eventually, you'll get that "eureka" moment

  4. 0:29 스마트폰에 장착된 가속도계

    0:32 가속도계의 주요 파트

    – Housing(케이스)

    – Seismic Mass(스프링이 달린 무거운 금속 공)

    0:44 스프링이 얼마나 늘어났는지를 측정하여 중력을 계산할수 있다.

    0:53 xyz 축에 각각 가속도계를 장착하여 중력이 작동하는 축의 방향을 알수있다.

    1:18 스마트폰 가속도계

  5. All you’ve done is prove Newton’s 3rd law and it’s implementation using hardware within the phone device.
    All connectivity can be disengaged on the phone.
    The phone will still apply the the implementation of Newton’s 3rd law.
    So you’ve implied it uses the the “force of gravity” which isn’t true.
    All that is being applied to detect the force on the accelerometer is density and buoyancy.
    The video is pseudoscience and the idea the mass attraction is real is complete nonsense.
    Our environment is electromagnetic and we tangibly experience buoyancy and density.

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