Violent earthquake gestation and imminent earthquake sound monitoring probe and circuit module structure

Abstract

The invention discloses a violent earthquake gestation and imminent earthquake sound monitoring probe and a circuit module structure. The probe structure is directly coupled with a base rock through a taper microphone head and conducts an earthquake sound to a sound transmission rod which is directly connected with the probe structure. A band-shape piezoelectric film sensor which is pasted on a surface of the sound transmission rod converts an earthquake sound signal into an electrical signal. The sound transmission rod, a band-shape piezoelectric film sensor group and a processing circuit are packaged through using a glue, and are fixed and protected. Besides, a probe circuit module structure carries out backup on the captured earthquake sound signal from three hierarchies of a sensor unit, the processing circuit and a transmission process so that reliability of a whole circuit system is increased. The sensor adopts the piezoelectric film sensor. There are the advantages that sensitivity is high; a dynamic scope is large and a frequency response scope is large too. By using the above technical scheme, the probes can be densely arranged in the base rocks which are under 150 meters to 200 meters of an earthquake-prone belt in a large scale so that violent-earthquake imminent earthquake sound monitoring work can be performed reliably for a long time and with low cost.

Description

technical field [0001] The patent of the present invention relates to the field of large earthquake monitoring equipment and circuit system design, and specifically relates to a large earthquake breeding process based on a geoacoustic detection method, a structure of a probe for monitoring an impending earthquake, and a circuit module structure. Background technique [0002] After the earth is constantly moving and changing, once huge energy is accumulated in some fragile areas of the earth's crust, causing the rocks to break suddenly, or triggering the dislocation of the original fault, this is an earthquake. Strengthening the research on countermeasures of earthquake disasters, improving the technical level of earthquake monitoring and prediction, and mitigating earthquake disasters are directly related and of great significance to the development of the country, the stability of society and the safety of people's lives and properties. [0003] Before a major earthquake, i...

AI Technical Summary

Problems solved by technology

These technical solutions have some common problems: First, the geoacoustic information includes the high-frequency ultrasonic waves generated by the underground bedrock section and its surrounding small breaks and micro-fractures during the earthquake incubation process or before the earthquake, and also includes the bedrock before the earthquake. Low-frequency audible waves and infrasound waves generated during macroscopic rupture and crustal creep (Tian Shixiu, "Ground Acoustics and Earthquake Prediction", Physics [J], 1978)

However, the current technical solutions all use acoustic sensors with a single spectral response, and only care about geoacoustic signals with a frequency below 300 Hz, and cannot effectively detect high-frequency signals; secondly, one of the difficulties in geoacoustic monitoring before earthquakes is that Long-term continuous monitoring, which requires very good reliability of instruments or equipment (Zheng Zhizhen, "Progress and Future Direction of Geoacoustic Information Engineering Research", China Earthquake [J], 1989)

However, due to the complex underground environment, there are strict requirements on the reliability of sensors, processing circuits, and transmission processes. However, none of the above-mentioned technical solutions has made effective and reasonable backups for the above-mentioned links to ensure that instruments or equipment can be used for a long time. third, another difficulty in pre-earthquake geoacoustic monitoring is that it is not easy to select suitable deep water wells as geoacoustic observation wells (Zheng Zhizhen, "Progress and Future Direction of Geoacoustic Information Engineering Research", China Earthquake [J ], 1989), and the probes of existing instruments or equipment need to be installed in existing deep-water wells to reduce installation costs, resulting in the inability to deploy intensive and large-scale geoacoustic monitoring points

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