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Single station earthquake P wave detection warning device

An early warning device and single station technology, applied in the direction of seismic signal receivers, etc., can solve the problems of high construction requirements, long construction period, large investment in seismic station construction and sensor network laying, etc., achieving small size, low cost, and easy installation. Effect

Inactive Publication Date: 2013-04-10
INST OF EARTHQUAKE CHINA EARTHQUAKE ADMINISTRATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 1. The construction of seismic stations and the laying of sensor networks require a large investment, a long construction period, and relatively high construction requirements;

Method used

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  • Single station earthquake P wave detection warning device
  • Single station earthquake P wave detection warning device
  • Single station earthquake P wave detection warning device

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Embodiment Construction

[0068] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0069] 1. Overall

[0070] Such as figure 1 , the present invention includes a data acquisition module 10, a data analysis and recording module 20, and a communication and alarm module 30 connected in sequence.

[0071] 2. Function block

[0072] 1) Data acquisition module 10

[0073] The data acquisition module 10 is composed of a triaxial force balance type acceleration sensor 11 and an external acceleration sensor interface 12 .

[0074] (1) Three-axis force balance acceleration sensor 11

[0075] The main reference technical indicators of the sensor selected by the triaxial force balance type acceleration sensor 11 include:

[0076] Measuring range: ±2g;

[0077] Sensitivity: ±1.25V / g;

[0078] Dynamic range: >135dB;

[0079] Damping constant: 0.7;

[0080] Output impedance: <1Ω;

[0081] Natural frequency: 80Hz;

[0082] Frequency band...

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Abstract

The invention discloses a single station earthquake P wave detection warning device and relates to seismological observation technology. The single station earthquake P wave detection warning device comprises a data acquisition module, a data analysis and logging module and a communication and alarm module, wherein the data acquisition module, the data analysis and logging module and the communication and alarm module are connected in sequence. The data acquisition module is composed of three-axial force balance acceleration sensor and an external connection acceleration sensor interface. The data analysis and logging module is composed of a analog-digital (AD) convertor, a digital signal processor (DSP), an advanced RISC machine (ARM) and system thereof, a global position system (GPRS) module, a P wave early warning algorithm, a real-time clock and a secure digital (SD) card storage. The communication and alarm module is composed of a computer, an alarm box and a P wave early warning instrument application software. The single station earthquake P wave detection warning device has the functions of acquisition, storage, analysis and alarm. Earthquake monitoring and earthquake P wave early warning are achieved only a single device is needed. The single station earthquake P wave detection warning device has the advantages of being small in size, light, easy to carry, convenient to install, low in cost and suitable for network layout of an earthquake early warning project and a national earthquake early warning science research project for a key project.

Description

technical field [0001] The invention relates to earthquake observation technology, in particular to a single-station earthquake P-wave detection and early warning instrument. Background technique [0002] When an earthquake occurs, first of all, two seismic waves, P wave (longitudinal wave) and S wave (shear wave) from the hypocenter occur simultaneously. P waves propagate at a speed of about 6 km per second and S waves at a speed of 3.5 km per second in the shallow layer of the earth's crust. Because the P wave and the S wave travel at different speeds, you will first feel a small shaking (P wave), and then a big shaking (S wave). The farther you are from the source, the longer this interval will be. [0003] Because the P wave advances the fastest among all seismic waves, it also arrives first, and the P wave can be transmitted in solid, liquid or gas. Earthquake P-wave early warning is to use the difference in transmission speed between P-wave and S-wave, and use the t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/18
Inventor 陈志高郭唐永李井冈邹彤王秋良黄俊夏界宁蒋冰莉杨江项大鹏
Owner INST OF EARTHQUAKE CHINA EARTHQUAKE ADMINISTRATION
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