Portable aftershock alarm apparatus for earthquake salvation scene

Abstract

The invention relates to a portable on-site aftershock alarm device for earthquake salvation, which mainly comprises a pendulum bob spike shaft, a pendulum bob, and an inverse ratio rod, a fixed ring contact and an alarm circuit that are arranged on a pendulum shaft and the like. The swinging of the inverse ratio rod of the pendulum bob leads the inverse ratio rod and the peripheral fixed contacts to generate collision, which is taken as alarm reference, so as to achieve that the alarm for aftershock is sent automatically, and the invention belongs to the closing type automatic alarm technology of a swinging trigger circuit. When the pendulum bob is static, the alarm device does not give the alarm, and in the state, the second falling of the collapsed buildings ruins does not happen without foundation; and if the pendulum bob starts to swing and the alarm device to give the alarm, the swinging of the ground surface represents the premonitor of the aftershock or the coming of small aftershock. The alarm device is suitable for being carried owing to the small size and can be more suitable for being matched to use on the site of earthquake salvation as a direct current battery is used as well as the alarm device can be arranged on the collapsed and flat ruins after earthquake or in the gap near the ruins and can automatically and continuously give the alarm by a plurality of times without manual operation during the process.

Description

1. Technical field

[0001] The invention relates to a portable aftershock alarm at the scene of earthquake rescue, which uses the vibration of an inverse ratio rod on the pendulum to collide with the surrounding fixed contacts as the alarm reference, belongs to the automatic alarm technology of the closed type triggering circuit of the vibration, and is especially small in size Portable, suitable for earthquake rescue sites, so that rescuers can also get the warning of the coming aftershocks in time. 2. Background technology

[0002] Looking back at the rescue site of the Wenchuan Earthquake not long ago, since there were not many aftershock alarms that were easy to carry, when the aftershocks came, the rescuers could only use the sound of landslides on the hillside to know that the aftershocks were coming. , must know the safety of the rescuers. As a result, the earthquake rescue scene urgently needs to be equipped with a portable aftershock alarm, so as to avoid or reduce ...

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