Earthquake early warning sensor

Abstract

The invention discloses an earthquake early warning sensor, which comprises a fixing frame, a shell, a right plug, an electric push rod, a left plug, a right pressing plate, a left pressing plate, a main spring, an inner sliding sleeve and a copper plate, and is characterized in that the shell is fastened and mounted deep in the earth surface through four foundation bolts, the fixing frame is mounted in the shell, and the left plug and the right plug are mounted at the top of the fixing frame; the inner sliding sleeve is installed in the fixing frame to form a sliding pair, the inner sliding sleeve can rapidly bounce upwards under the action of elastic force of the main spring, a circuit of the left plug and a circuit of the right plug are connected through the copper plate, the left pressing plate, the right pressing plate and the fixing frame form a rotating pair, the left end of the front supporting rod is fixedly connected with the left pressing plate, and the right heavy block issuspended at the right end. The right end of the rear supporting rod is fixedly connected with the right pressing plate, the left weight is suspended at the left end of the rear supporting rod, the left pressing plate and the right pressing plate press the inner sliding sleeve tightly under the action of gravity of the left weight and the right weight and lock the inner sliding sleeve from movingupwards 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 circuit-off initial position.

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] Earthquake sensor is an important part of the earthquake early warning system, which requires the first time to detect the longitudinal wave (P wave) generated by the earthquake, 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. It may prolong the golden escape time and save people's lives and properties; the existing seismic sensors mostly use complex circuit equipment composed of sensitive elements, conversion elements, conversion circuits and auxiliary power supplies. The structure and principle are relatively complicated, the manufacturing cost is high, and the reliability is low.

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