A bidirectionally recognizable microfluidic inertial power switch

Abstract

The invention discloses a bidirectionally identifiable microfluid inertial electric switch, which comprises a base, a cover plate, metal droplets, metal electrodes and microchannels. The cover plate is located at the upper end of the base, and the two are sealed; the microchannel is arranged on the base; the metal electrode is arranged on the cover plate; Valves, straight channels and bends; the metal droplet is located in a rectangular reservoir. One end contact of the metal electrode is located in the microchannel, and the other end contact is located outside the overlapping area of ​​the base and the cover plate. When the inertial force on the switch is greater than its threshold, the metal droplet will break through the capillary valve. After the recoil load and service load disappear, the metal droplet can completely return to the rectangular liquid storage pool. Under the action, the metal droplet conducts the switch and is irreversible. The invention can bidirectionally identify the acceleration load, stably connect electricity, and has the performance of working in a low temperature environment.

Description

technical field [0001] The invention belongs to the technical field of microfluidic chips, in particular to a bidirectionally identifiable microfluid inertial switch. Background technique [0002] The microfluidic inertial switch is a new type of inertial switch proposed on the basis of microfluidic technology and new material technology. The traditional micromechanical inertial switch is generally composed of a cantilever beam and a mass-spring system, and the switch is turned on through the "solid-solid" contact of the mechanical contact; Instability and other problems reduce the reliability of the switch. The microfluidic inertial switch can effectively avoid such shortcomings. Microfluidic inertial contact switches generally use liquid metal as the working fluid. When the switch is subjected to an acceleration greater than its threshold, the working fluid will reach the position of the fixed signal electrode through the microchannel, and then turn on the switch. [00...

AI Technical Summary

Problems solved by technology

However, the switch also has disadvantages, such as the large width of the microchannel, resulting in a low switching threshold of about 22g; the structure of the microchannel is simple, and the switch can only be turned on under the action of inertial force, and it cannot be reliably locked after the inertial force disappears, and cannot be distinguished Environmental force; the substrate adopts PDMS porous material, which is not conducive to the long-term storage of the switch

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