Seismic Recording Unit With Retractable Arms
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Solution Overview
Problem
Current seismic data recording technologies face challenges in accurately determining the horizontal gradient of seismic wavefields due to environmental noise, mechanical perturbations, and sensor calibration issues, which affect the precision of seismic data acquisition and processing.
Innovation Solution
The implementation of a seismic data recording unit with retractable arms and sensors positioned at the corners of a polygonal housing, which includes mechanisms for mechanical isolation and wireless communication, allows for precise measurement of seismic data and determination of horizontal gradients by moving the arms to optimal positions for data acquisition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If sensors are positioned close to the housing for compact deployment, then device portability and ease of deployment improve, but measurement precision deteriorates due to increased susceptibility to mechanical perturbations and environmental noise
Solution Approach 1:
The recording unit is segmented into a central housing and multiple extendable arms that can be deployed independently. Each arm carries sensors at its end, physically separating the sensor measurement zone from the housing to reduce mechanical coupling and environmental noise interference while maintaining compact storage.
Solution Approach 2:
The sensor array is extended from a two-dimensional surface mounting on the housing to a three-dimensional spatial configuration using extendable arms. This vertical dimensionality change allows sensors to be positioned at optimal distances from the housing to minimize noise while maintaining operational compactness.
2Measurement precision
If multiple sensors are deployed at extended positions to improve gradient measurement accuracy, then measurement precision improves, but device complexity increases due to additional mechanical components and control systems
Solution Approach 1:
The extendable arm mechanism serves multiple functions: it positions sensors at optimal measurement distances, provides mechanical isolation from housing vibrations, enables compact storage and deployment, and maintains fixed geometric relationships between sensors for gradient calculations. This multi-functionality reduces the need for separate systems for each purpose.
Solution Approach 2:
The arms are designed to nest within or alongside the housing when not in use, and to extend outward when measurement is required. This nesting principle allows the complex extended structure to be stored in a compact form factor, reducing operational complexity while maintaining measurement precision capabilities.
3Device complexity
If sensors are fixed to the housing for structural simplicity, then device complexity decreases, but measurement precision deteriorates due to mechanical coupling with housing vibrations and environmental noise
Solution Approach 1:
The extendable arms act as mechanical intermediaries between the housing and the sensors. They provide a controlled mechanical connection that isolates sensors from housing vibrations and environmental noise while maintaining the structural integrity and geometric stability needed for accurate gradient measurements.
Data Source
AI summary
A seismic data recording unit. The seismic data recording unit may include a housing and retractable arms coupled to the housing. The seismic data recording unit may include a respective seismic sensor coupled proximate the end of a retractable arm. The retractable arm may move from a position on or proximate the housing to a position away from the housing.