Prof. Liping Wu Profile

Prof. Liping Wu

at Chinese Academy of Engineering Physics

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Proceedings Article | 3 November 2010 Paper

A new acceleration switch based on separated mass component and elastic component

Liping Wu, Jun Hu, Bo Yang, Qing Shao, Gang Peng

Proceedings Volume 7833, 78330A (2010) https://doi.org/10.1117/12.864916

KEYWORDS: Switches, Pollution control, Calibration, Stochastic processes, Mathematical modeling, Statistical analysis, Magnesium, Electronics engineering, Physics, Sensors

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This paper presents a new linear inertial acceleration switch which senses inertial acceleration and gives a signal of switchpoint. It is an entire mechanical device has two particular characters: a simple structure and an environmental interference-free capability. The structure and work principle of the switch is introduced, then the design process to the spring is analyzed and simulated, and finally the rationality of this acceleration switch's design is given according to the sample's testing data. In this acceleration switch, the elastic component is a leaf spring, and the mass component is a standard steel ball. The spring and the ball are separated instead of rigidly connected, which make the whole structure is simple. When the switch is on the work direction the ball and the spring are interact, and the spring is on work; when the switch isn't on the work direction, the ball and the spring are separated; environmental external force is on the mass instead of on the spring. The spring is insusceptible on this condition. This particularity determines that the switch is highly environmental interference-free, and doesn't easily affected by environmental influence. Some parameters of the inertial switch are given as followings: (1) Overall dimension of the inertial switch is about 28mm×12mm×12mm; (2) systemic precision of the inertial switch is 1.5%; (3) the inertial switch can endure 0.2g²/Hz stochastic vibration. It is suggested that this inertial switch can be applied in high consequence system.

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