All-Dip Seismometer with Dynamic Force Feedback
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Solution Overview
Problem
Traditional seismometers face challenges in maintaining performance due to equipment aging and environmental changes, particularly in non-horizontal deployment environments, where they struggle to maintain low distortion rates beyond ±10° inclination angles.
Innovation Solution
A seismometer design incorporating multiple force feedback modules with dynamic force balance and all-dip broadband detection methods, utilizing PID feedback circuits and AI-driven feedback parameter adjustment to adapt to changing conditions and inclination angles, ensuring high sensitivity and accuracy across 360 degrees.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If traditional force feedback seismic sensors use statically solidified feedback circuits, then the device complexity is reduced, but the measurement precision deteriorates due to feedback parameter drift caused by equipment aging and temperature changes
Solution Approach 1:
The patent implements dynamic feedback parameters that can be adjusted in real-time based on environmental conditions and equipment state. The feedback circuit transitions from a static, fixed configuration to a dynamic system where parameters such as gain and damping can be modified during operation to compensate for aging and temperature effects, thereby maintaining measurement precision without significantly increasing structural complexity.
Solution Approach 2:
The patent introduces self-diagnosis and self-adjustment feedback mechanisms that monitor the actual performance of the seismic sensor and automatically correct feedback parameters. This layered feedback approach (including application layer, algorithm layer, and sensing layer) enables the system to detect parameter drift and dynamically adjust compensation values, resolving the contradiction between simple structure and stable precision.
2Manufacturing precision
If seismometers are designed for horizontal deployment only, then the manufacturing precision is improved, but the adaptability deteriorates when deployed in non-horizontal environments with inclination angles exceeding ±10°
Solution Approach 1:
The patent designs the seismic sensor with multi-functional capability to operate accurately across multiple deployment orientations. By integrating all-dip broadband detection methodology and dynamic force balance feedback, the device achieves universal performance in horizontal, inclined, and reversed positions, eliminating the need for orientation-specific calibration while maintaining manufacturing precision standards.
Solution Approach 2:
The patent dynamically adjusts feedback parameters based on the actual deployment orientation detected by the system. When the sensor is deployed at non-horizontal angles, the feedback circuit automatically modifies gain, phase, and damping parameters to compensate for gravitational interference and orientation-induced errors, enabling accurate measurement across ±180° inclination ranges without sacrificing manufacturing precision.
3Ease of operation
If seismometers operate in non-horizontal environments with inclination angles beyond ±10°, then the ease of operation is improved for complex surface deployments, but the measurement precision deteriorates due to increased distortion rates
Solution Approach 1:
The patent employs dynamic force balance feedback that continuously monitors and compensates for distortion caused by inclined deployment. The feedback system detects orientation-induced errors and applies real-time corrections through adjusted feedback forces, maintaining measurement precision with distortion rates of 0.1% at ±30° and 0.3% at ±180°, thereby enabling easy operation in complex terrains without precision loss.
Solution Approach 2:
The patent implements preliminary compensation mechanisms that anticipate and counteract gravitational interference before it affects measurements. By using all-dip broadband detection and pre-calibrated feedback parameters for various inclination angles, the system proactively neutralizes distortion effects, allowing deployment in non-horizontal environments while maintaining measurement accuracy.
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
The solution effectively reduces distortion rates to 0.1% at ±30° and 0.3% at ±180°, enhancing the seismometer's ability to operate accurately in complex, non-horizontal environments by dynamically adjusting feedback parameters and canceling gravity interference.
Implementation Method 1
the first force feedback module is fixed on the magnetic shoe... the PID feedback circuit is configured to generate feedback current according to the feedback parameters of the seismometer, and generate feedback force based on the coil
Implementation Method 2
an upper leaf spring... a lower leaf spring... the top cover is tightly pressed on the upper leaf spring... the magnetic shoe is tightly pressed on the lower leaf spring
Data Source
AI summary
A seismometer with high sensitivity, broadband and all-dip is provided, The which relates to the technical field of seismometer, including a first force feedback module, an insulator, a top cover, a terminal post, an upper leaf spring, a mass block, a casing, a sealing ring, an insulation gasket, a guide spring, a wire frame, a magnetic shoe, a compensation ring, a lower leaf spring, a bottom cover, a second force feedback module and a third force feedback module. It provides the broadband seismometer technology based on dynamic force balance feedback and the all-dip broadband seismometer technology based on dip angle perception, which breaks through the limitations of conventional seismometers in sensitivity, frequency band, and dip angle, and truly realizes a seismometer with high sensitivity, broadband, and all-dip.