Self-restoring micro-fluid inertia power switch device

Abstract

The invention discloses a self-restoring micro-fluid inertia power switch device, which comprises a gallium-indium metal liquid drop, a poly(N,N'-dimethylacrylamide) (PDMA) base, a glass cover board, a liquid drop storage pool, a rectangular micro-channel, a U-shaped micro-channel and metal electrodes, wherein the liquid drop storage pool, the U-shaped micro-channel and the rectangular micro-channel are arranged on a polymethyl methacrylate (PMMA) plate; the metal electrodes are bonded on the glass cover board; the gallium-indium metal liquid drop is initially located in the liquid drop storage pool; and when the inertia force on a switch is greater than the threshold of a passive valve, a metal liquid breaks through the passive valve and enters a micro-channel electrode, and the switch is connected. The liquid flows to a cutoff passive valve in the U-shaped micro-channel at most; when the inertia force disappears, a capillary force difference of the liquid exists between two ends of the micro-channel, so that the liquid automatically flows to the initial position, and the property of the switch is restored. The self-restoring micro-fluid inertia power switch device disclosed by the invention is simple in structure, stable and reliable in contact; and compared with an existing micro-fluid inertia switch, the switch has self-restoring capability, and can be used for a plurality of times.

Description

technical field [0001] The invention relates to a self-recovery inertial time-delay power-on switch device, in particular to a microfluid inertial power-on switch device. Background technique [0002] Inertial switch is also known as g switch, threshold sensor, etc. It is used to sense the acceleration signal. When the acceleration signal exceeding the set threshold is detected, the switch mechanical action is executed and the electrical signal is triggered. Therefore, the inertial switch is a combination of sensing and execution. Integrated precision inertial device. Due to the direct response to the acceleration, the micro-inertial switch omits the internal structure and driving source required for the control of the moving parts of the switch. Communication, automobile, aerospace and inertial navigation and other fields, such as: fuze control of missiles, bombs and penetrating weapons, fairing shedding control in aircraft launch, safety airbag in automobile safety system...

AI Technical Summary

Problems solved by technology

[0003] At present, MEMS inertial switches are mainly solid-solid contact type, but there are big problems in the contact of this type of switch: 1) The contact pressure is small, which will produce a large resistance; 2) The metal solid surface is easy to wear and degrade, This will directly affect the contact performance of the switch; 3) The spring itself will cause vibration interference to the switch, which will affect the stability of the contact of the inertial switch; 4) The spring will deform under high overload, which will affect the normal operation of the mechanical inertial switch

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