Earthquake Determination System Using P-Wave Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing earthquake alert systems face delays in determining earthquake occurrence due to discrimination between earthquake P waves and living noises, leading to unreliable alerts and potential false alarms, and cannot confirm earthquake occurrence until S waves arrive.
Innovation Solution
An earthquake determination system with dispersed observation terminal devices connected by a communication network, where each device includes a seismometer and a simplified earthquake determination portion that estimates P-wave detection, transmitting estimated P-wave detection information to a seismic analysis processor, which determines earthquake occurrence based on distance and time intervals between detection points, allowing for early and accurate determination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If discrimination between earthquake P waves and living noises is performed to ensure accurate earthquake detection, then reliability of earthquake determination is improved, but determination time is extended causing delays in earthquake alert issuance
Solution Approach 1:
The system performs preliminary action by having each observation terminal device pre-calculate arrival time differences for all possible seismic center locations based on stored propagation speed data. When P waves are detected, the system only needs to match the observed arrival time difference against pre-calculated values, avoiding time-consuming real-time calculations and enabling rapid earthquake determination
Solution Approach 2:
The system segments the earthquake detection task by distributing observation terminals across multiple locations, each independently detecting P waves and transmitting detection information to the central determination device. This parallel detection approach reduces overall determination time while maintaining reliability through multiple observation points
2Speed
If a single observation point detects vibration exceeding threshold to enable early earthquake detection, then response speed is improved, but false alarms occur due to living noises
Solution Approach 1:
The system merges observations from multiple geographically distributed terminals by having them all transmit detection information to a central determination device. The central device combines these observations and uses arrival time difference analysis to distinguish true earthquake signals from local living noises, enabling early detection without false alarms
Solution Approach 2:
The central earthquake determination device acts as an intermediary that receives detection information from multiple terminals, calculates arrival time differences, and determines whether the vibration represents a true earthquake or living noise. This intermediary processing layer filters out false alarms while maintaining early detection capability
3Measurement precision
If multiple observation terminals transmit detailed vibration data to central processor for analysis, then measurement precision is improved, but communication network becomes congested
Solution Approach 1:
The system extracts only the essential earthquake detection information (P wave arrival time, detection location) from the full vibration data at each terminal and transmits only this extracted information to the central processor. The central device then performs precise earthquake parameter analysis using this streamlined data, avoiding network congestion while maintaining measurement precision
Solution Approach 2:
The observation terminals perform preliminary processing by identifying and extracting only the P wave detection information before transmission. This pre-extraction of critical data reduces communication load significantly while preserving all information needed for accurate earthquake determination
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables early and accurate determination of earthquake occurrence with high probability, preventing false alarms and ensuring timely alerts, and allows for analysis of earthquake parameters without network congestion.
Implementation Method 1
each observation terminal device includes a seismometer which outputs vibration waveform information at the installed position
Implementation Method 2
the minimum propagation speed of the earthquake P waves is SP
Data Source
AI summary
An earthquake determination system which includes a plurality of observation terminal devices are connected by a communication network. When estimated P-wave detection information is received from the plurality of the observation terminal devices, a distance D between the observation terminal devices and a time interval δ between detection times are acquired and when transmission limit distance of local vibration energy is DSL, the minimum propagation speed of the earthquake P waves is SP, and the maximum detection error between detection times by the pair of observation terminal devices is Δt, the seismic analysis processor determines occurrence of an earthquake, if the both of the two pairs of the observation terminal devices satisfy the relationships of 2DSL<D and δ<D/SP+Δt.