Bridle Block Sensor Integration for Marine Deflector Tension Monitoring

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Solution Overview

Problem

Marine seismic survey systems face challenges in accurately monitoring tensions in connecting ropes of deflectors, leading to potential system failures due to insufficient information on actual tensions applied to the bridle block, especially during abrupt changes.

Innovation Solution

Embedding sensors in the bridle block to measure the strength and direction of tensions in multiple ropes connected to the deflector, allowing for real-time monitoring and data transmission to a data acquisition unit for improved control and operation strategies.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of information

If tension is estimated based on a single measurable tow rope tension, then the measurement system remains simple, but the information on actual tensions applied to the bridle block is insufficient

Engineering Contradiction:
Improvetension informationVSAvoidmonitoring system
Core Design Contradiction:
Loss of informationVSDevice complexity

Solution Approach 1:

The patent introduces sensors as intermediary devices embedded in the bridle block to directly measure tensions in multiple ropes. These sensors act as mediators between the physical tension forces and the monitoring system, providing accurate real-time data without requiring complex external measurement equipment. This resolves the contradiction by enabling comprehensive tension information collection while keeping the overall system architecture relatively simple through direct embedding of measurement devices.

Inventive Principle:
Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent replaces indirect mechanical estimation methods (based on single rope tension) with direct sensing technology. By embedding sensors that directly measure tension forces in multiple ropes connected to the bridle block, the system substitutes mechanical estimation with electronic measurement, achieving more accurate and comprehensive tension information while maintaining system simplicity through integration.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

2Reliability

If multiple sensors are embedded in the bridle block to measure tensions in multiple ropes, then comprehensive tension data is obtained, but the device complexity increases

Engineering Contradiction:
Improvemonitoring accuracyVSAvoidsensor system
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The patent merges multiple sensing functions into a single integrated bridle block structure. By embedding multiple sensors directly within the bridle block, the system combines what would otherwise be separate measurement devices into one unified component. This approach achieves reliable comprehensive tension monitoring while minimizing the increase in device complexity through spatial and functional integration of multiple sensors in a single location.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The bridle block serves multiple functions: it connects multiple ropes to the deflector and simultaneously houses multiple tension sensors. This multi-functional design allows the same structural component to perform both mechanical connection and measurement functions, thereby achieving reliable comprehensive monitoring without proportionally increasing overall system complexity. The universal use of the bridle block for both structural and sensing purposes resolves the contradiction effectively.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Data Source

PatentEP2759851B1System for real-time deflector monitoring and related methods
Publication Date: 2019.08.21 CGG SERVICES SAS
  • EP2759851B1 patent drawingFigure 1
  • EP2759851B1 patent drawingFigure 2~3
  • EP2759851B1 patent drawingFigure 4

AI summary

A real time deflector monitoring system related to a deflector used in a seismic survey system is provided. The system includes a bridle block (120) configured to connect the deflector (110) to a first rope (122,124). The system further includes sensors (62,64,65,66,72,74) embedded in the bridle block and configured to measure strength and direction of a tension in at least one of (A) the first rope and/or (B) one of rig ropes (115a,116a,117a,115b,116b,117b) connecting the deflector to the bridle block. The system also includes a motion detector (118,119) configured to acquire information related to deflector's motion.