Photodiode Sensor for Continuous Laser Beam Monitoring
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Solution Overview
Problem
Current laser welding processes rely on complex and offline methods for monitoring laser beam quality, which are inefficient and lack direct sensing capabilities for real-time control.
Innovation Solution
A system utilizing a photo diode sensor mounted adjacent to the laser beam's optical path for continuous monitoring, with a laser beam optical path analysis module to analyze and report sensor output, allowing for real-time correlation of laser beam parameters with welding process stability and quality control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If complex mathematical algorithms and multiple sensors (infrared, ultraviolet, high-speed camera, acoustic sensors) are used for laser beam monitoring, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent extracts only the essential monitoring function by using a single photodiode sensor positioned in the laser beam path, eliminating the need for multiple complex sensors and mathematical algorithms while maintaining the ability to monitor laser beam quality for welding process control
Solution Approach 2:
The patent replaces complex mechanical and computational monitoring systems with a simple optical detection system using a photodiode sensor that directly converts laser light into electrical signals for immediate analysis and control
2Device complexity
If offline visual inspection methods are used for weld quality analysis, then device complexity is reduced, but productivity decreases
Solution Approach 1:
The patent implements continuous real-time monitoring of laser beam parameters during the welding process, replacing discrete offline visual inspection with continuous feedback that enables immediate detection and correction of quality issues, thereby increasing productivity
Solution Approach 2:
The patent establishes a feedback loop where the photodiode sensor continuously monitors laser beam characteristics and provides real-time data to control the welding process, enabling dynamic quality assurance without stopping production
3Reliability
If multiple sensors and complex algorithms are deployed for real-time laser monitoring, then reliability is improved, but ease of operation deteriorates
Solution Approach 1:
The patent extracts only the essential laser beam monitoring function using a single photodiode sensor, eliminating complex data processing requirements while maintaining reliability for welding process control through direct optical-to-electrical signal conversion
Solution Approach 2:
The photodiode sensor system performs self-contained monitoring by directly converting laser light into analytical electrical signals that can be immediately used for process control without requiring external complex computational systems
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 continuous monitoring and analysis of laser beam parameters, improving weld quality by providing real-time feedback and simplifying data analysis, thus enhancing process control without measuring laser beam energy or power.
Implementation Method 1
A photodiode sensor mounted into the laser beam head at a point downstream from all optics and upstream from the workpiece in the optical path of a laser beam used for welding a workpiece
Data Source
AI summary
A system for continuously monitoring a laser beam includes a photodiode sensor mounted adjacent to a laser beam optical path. A laser beam optical path analysis module connected to the photodiode sensor and adapted to receive, analyze and report the sensor output from the photodiode sensor.