Earthquake early warning sensor

Abstract

The invention discloses an earthquake early warning sensor, which comprises a fixing frame, a shell, an electric push rod, a left pressing rod, a main spring, a right pressing rod and an inner slidingsleeve. The shell is fastened and installed in the deep position of the earth surface through foundation bolts; the fixing frame is installed in the shell, and a left gravity liquid bin and a right gravity liquid bin which are filled with mercury are arranged on the left side and the right side of the fixing frame; the left pressing rod and the right pressing rod are installed at the bottom of the left gravity liquid bin and the bottom of the right gravity liquid bin respectively; the left plug and the right plug are installed at the top of the fixing frame; the inner sliding sleeve is installed in the fixing frame and forms a sliding pair; the bottom cover is installed at the lower end of the fixing frame; the main spring is arranged between the inner sliding sleeve and the bottom cover;under the action of the main spring, the inner sliding sleeve can bounce up to make a copper plate on the top end of the inner sliding sleeve conduct the circuits of the left plug and the right plug;and under the action of mercury gravity, the left pressing rod and the right pressing rod press the inner sliding sleeve tightly, so that upward movement of the inner sliding sleeve is locked and stopped under the action of friction force, and the electric push rod installed at the top end of the fixing frame can push the inner sliding sleeve to move downwards to the initial position where the circuit is disconnected.

Description

technical field [0001] The invention relates to an earthquake early warning sensor. Background technique [0002] Earthquakes propagate from the source to the surroundings in the form of waves. The waves generated by earthquakes are called seismic waves. According to the propagation characteristics of seismic waves, seismic waves can be divided into longitudinal waves, transverse waves and surface waves; For the compression wave transmitted outward, the vibration direction of the particle is consistent with the forward direction of the wave. The longitudinal wave can propagate in solids and liquids. The propagation speed of this wave is fast, and the propagation speed in the crust is about 5-6 kilometers per second. , the period of the longitudinal wave is short and the amplitude is small, which can cause the ground to jump up and down; the shear wave (S wave) is a shear wave transmitted from the source, the vibration direction of the particle is perpendicular to the directi...

AI Technical Summary

Problems solved by technology

[0004] The earthquake early warning sensor is an important part of the earthquake early warning system. It is required to detect the longitudinal wave (P wave) generated by the earthquake at the first time, and convert the vibration information into an electrical signal, and use the characteristics of the rapid transmission of the electrical signal to issue an earthquake warning in time. Prolong the golden escape time as much as possible to save people's lives and property; the existing seismic sensors mostly use complex circuit equipment composed of sensitive elements, conversion elements, conversion circuits and auxiliary power supplies, the structure principle is relatively complicated, the manufacturing cost is high, and the reliability is relatively high. Low

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