Three-dimensional acceleration detection method

Abstract

The invention discloses a three-dimensional acceleration detection method, which comprises the steps of: (1) generating repulsive magnetic forces simultaneously by utilizing six surfaces so that a magnetic suspension body can reach a six-surface magnetic force equilibrium state and is suspended in a magnetic cavity; (2) breaking the equilibrium state between the magnetic cavity and the magnetic suspension body and generating relative displacement when a detected carrier accelerates, further converting acceleration variations into magnetic force variations between the magnetic suspension body and the magnetic cavity; (3) forming a magnetic force sensing structure on each of the six surfaces of the magnetic cavity, and converting the magnetic force variations between the magnetic suspensionbody and the magnetic cavity into corresponding electric signals by means of the magnetic force sensing structures; (4) and calculating a three-dimensional acceleration through detecting electric signal variations generated through detecting the six surfaces of the magnetic cavity. By adopting the three-dimensional acceleration detection method, the acceleration variations of the detected object cause magnetic force variations between the magnetic suspension body and the magnetic cavity, and the magnetic force variations are converted into electric signals by means of the magnetic force sensing structures, thus the relationship between the suspension body and acceleration input is simple and precise.

Description

technical field [0001] The invention relates to an acceleration sensor, which belongs to the field of instruments and meters, and more specifically relates to a detection method for measuring the three-dimensional acceleration of an object. Background technique [0002] Traditional accelerometers usually use a spring vibrator to sense acceleration changes, but due to the physical contact between the vibrator and the spring, it will be affected by factors such as mechanical structure performance and friction and cannot fully reflect the real acceleration input. In order to overcome this technical problem, countries all over the world have spared no effort to carry out research on various suspension accelerometers. Because there is no physical contact, they can fully reflect real acceleration changes, which is beneficial to improve accuracy and reduce volume. Magnetic levitation is an important research on levitation accelerometers. In the prior art, permanent magnets or soft ...

AI Technical Summary

Problems solved by technology

However, the magnetic field system is a very complex system, and it is difficult to accurately obtain the spatial position of the inspection magnet. At the same time, the path of the inspection magnet returning to the center is not unique, which makes the control algorithm of the coil current extremely complicated and difficult to repeat measurement.

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