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An accelerograph can be referred to as a strong-motion instrument or seismograph, or simply an earthquake accelerometer.They are usually constructed as a self-contained box, which previously included a paper or film recorder [1] (an analogue instrument) but now they often record directly on digital media and then the data is transmitted via the Internet.
An accelerometer measures proper acceleration, which is the acceleration it experiences relative to freefall and is the acceleration felt by people and objects. [2] Put another way, at any point in spacetime the equivalence principle guarantees the existence of a local inertial frame, and an accelerometer measures the acceleration relative to that frame. [4]
This device was itself derived from surplus accelerometers, originally made by Bosch, that were in operational use on the SM-65 Atlas intercontinental ballistic missile. [1] [2] This type of accelerometer was a pendular accelerometer, where changes in gravity results in minute changes in the tension of a suspended vibrating string. These ...
The PIGA was based on an accelerometer developed by Dr. Fritz Mueller, then of the Kreiselgeraete Company, for the LEV-3 and experimental SG-66 guidance system of the Nazi era German V2 (EMW A4) ballistic missile and was known among the German rocket scientists as the MMIA "Mueller Mechanical Integrating Accelerometer". This system used ...
The spring mass provides greater accuracy, and the piezoresistive properties of graphene converts the strain from acceleration to electrical signals for the accelerometer. The suspended graphene ribbon simultaneously forms the spring and piezoresistive transducer, making efficient use of space in while improving performance of NEMS accelerometers.
WASHINGTON (Reuters) -U.S. President-elect Donald Trump has chosen Brooke Rollins, president of the America First Policy Institute, to be agriculture secretary. "As our next Secretary of ...
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Elton John's gift may be his song, but that doesn't mean he loves them all.. During an appearance on The Late Show with Stephen Colbert on Tuesday, Dec. 17, the 77-year-old musician spoke about ...