Water Jet Pressure Sensing for Accurate Incision Detection

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Solution Overview

Problem

Water jet cutting techniques lack certainty about the completeness of incisions, leading to inefficiencies and inaccuracies, especially when dealing with small or hard-to-detect uncut sections, and require additional detectors that complicate underwater and small-object cutting operations.

Innovation Solution

A high-pressure water jet device with a pressure chamber and integrated pressure or flow sensors that detect pressure or flow rate changes to determine incision completeness, allowing for real-time monitoring and precision without external detectors.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If cutting time is increased to ensure complete incision, then reliability of incision completeness is improved, but productivity deteriorates

Engineering Contradiction:
Improveincision completenessVSAvoidcutting speed
Core Design Contradiction:
ReliabilityVSProductivity

Solution Approach 1:

The patent implements a feedback mechanism by monitoring pressure changes in the pressure chamber during cutting. When the incision is complete, pressure drops are detected and fed back to the control system, which then stops the cutting operation. This real-time feedback eliminates the need for extended cutting times while ensuring complete incisions, thus resolving the contradiction between reliability and productivity.

Inventive Principle:
Principle #23Feedback

Solution Approach 2:

The patent replaces mechanical detection methods (such as physical inspection or complex sensor systems) with pressure-based detection. By monitoring pressure changes in the fluid communication system, the system can detect incision completion without requiring additional mechanical detectors or extending cutting time, thereby improving both reliability and productivity.

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

2Measurement precision

If additional detectors are added to detect incision completeness, then measurement precision is improved, but device complexity deteriorates

Engineering Contradiction:
Improveincision detection accuracyVSAvoiddetector system complexity
Core Design Contradiction:
Measurement precisionVSDevice complexity

Solution Approach 1:

The patent makes the pressure chamber and fluid communication system serve multiple functions: it maintains water jet pressure during cutting and simultaneously detects incision completeness through pressure monitoring. This multi-functionality eliminates the need for separate detection detectors, reducing device complexity while maintaining measurement precision.

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

Solution Approach 2:

The system uses its own pressure chamber and fluid communication infrastructure to detect incision completeness. The pressure changes within the existing system provide self-service detection capability, eliminating the need for external detectors and simplifying the overall device architecture while maintaining accurate measurement.

Inventive Principle:
Principle #25Self-service

3Measurement precision

If external detectors are used to monitor incision, then measurement precision is improved, but ease of operation deteriorates

Engineering Contradiction:
Improveincision detection accuracyVSAvoidoperation simplicity
Core Design Contradiction:
Measurement precisionVSEase of operation

Solution Approach 1:

The patent merges the detection function with the cutting system by integrating pressure sensors into the existing pressure chamber and fluid communication infrastructure. This consolidation allows incision monitoring to be performed using the same components already present in the water jet system, eliminating the need for separate external detectors and simplifying operation.

Inventive Principle:
Principle #5Merging (Combining)

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

Ensures complete incisions with high accuracy, reduces cutting time, and maintains the benefits of water jet cutting by providing a simple, reliable method for both large and small objects, including marine applications, with improved precision and efficiency.

Implementation Method 1

said pressure chamber and said opening are in fluid communication with a pressure sensor for determining a pressure through said fluid communication

Methodology Applied
Scientific EffectPressure detection:

Implementation Method 2

said pressure chamber and said opening are in fluid communication with a flow sensor for determining a flow rate through said fluid communication

Methodology Applied
Scientific EffectFlow rate detection:

Data Source

PatentEP3441186B1Water jet device with sensor and method for water jet cutting
Publication Date: 2024.01.24 DECO SUBSEA NV
  • EP3441186B1 patent drawingFigure 1A
  • EP3441186B1 patent drawingFigure 1B
  • EP3441186B1 patent drawingFigure 2A

AI summary

The present invention relates to a high-pressure water jet device comprising a section for generating a high-pressure water jet (1), whereby said section for generating a high-pressure water jet opens into a pressure chamber (2) and whereby said pressure chamber is provided with a flow sensor (27) for determining a flow rate. The invention also relates to a method for water jet cutting with such a device and the use of a flow sensor for detecting an incision during a cutting operation.