The invention discloses a microfluid
inertia grounding switch capable of bidirectionally identifying. The switch comprises a substrate, a cover plate,
metal liquid drops, a
metal electrode and a microchannel, wherein the cover plate is arranged at an upper end of the substrate, the cover plate and the substrate are sealed, the micro channel is arranged on the substrate, the
metal electrode is arranged on the cover plate, the micro channel comprises a rectangular
liquid storage pool, a fan-shaped island,
a diamond passage, a capillary valve, a direct-through passage and a bending passage, themetal liquid drops are arranged in the rectangular
liquid storage pool, a contact at one end of the metal
electrode is arranged in the micro channel, and a contact at the other end of the metal electrode is arranged outside a coincided region of the substrate and the cover plate. When an
inertia force applied to the switch is larger than a threshold, the metal liquid drops can break through the capillary valve, the metal liquid drops can be completely recovered to the rectangular
liquid storage pool after a backblow load and a
service load are disappeared, and the switch is switched on by themetal liquid drops and the metal liquid drops cannot be recovered only under an effect of forward
inertia force when a pellet rubs with ground. By the switch, an acceleration load can be bidirectionally identified, power is stably connected, and the switch has performance of working under a low-temperature environment.