Laser Processing Sound Sensor Positioning for Accurate State Detection
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Solution Overview
Problem
The accuracy of detecting a processing state in laser processing is compromised due to the varying installation position of acoustic sensors, which can be affected by the material of the workpiece, leading to imbalances in wind noise and processing sound signals, resulting in inadequate signal-to-noise ratios.
Innovation Solution
A processing state detecting device that includes a sound collecting unit, an installation position evaluating unit, and an evaluation result informing unit, which assesses the installation position of the sound collecting unit and provides feedback to adjust its position for optimal signal quality, utilizing machine learning to generate a learning model for improved detection accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the acoustic sensor is installed close to the processing point, then the volume of processing sound to be measured is increased, but wind noise from assist gas is directly sprayed on the sensor causing measurement errors
Solution Approach 1:
The patent applies dynamics by making the acoustic sensor movable rather than fixed. The sensor can dynamically adjust its installation position along the laser beam path to optimize the balance between capturing sufficient processing sound and avoiding excessive wind noise from assist gas. This dynamic positioning capability allows the system to adapt to different processing conditions and workpiece materials.
Solution Approach 2:
The patent changes the positional parameter of the acoustic sensor to resolve the contradiction. By adjusting the distance between the sensor and the processing point, the system can optimize the signal-to-noise ratio for different workpiece materials and processing conditions, thereby improving measurement precision while minimizing wind noise interference.
2Object-affected harmful factors
If the acoustic sensor is installed far from the processing point, then wind noise interference is reduced, but the volume of processing sound to be measured becomes insufficient
Solution Approach 1:
The movable acoustic sensor enables dynamic adjustment of the distance parameter, allowing the system to move the sensor to optimal positions for different workpiece materials. This resolves the contradiction by providing flexibility to achieve sufficient processing sound volume while maintaining acceptable wind noise levels.
Solution Approach 2:
The system changes the positional parameter of the acoustic sensor to optimize the balance between processing sound volume and wind noise interference. By adjusting this parameter, the system can adapt to different material properties and processing conditions to maintain measurement precision.
3Device complexity
If the acoustic sensor installation position is fixed, then device complexity is reduced, but detection accuracy deteriorates when workpiece material changes
Solution Approach 1:
The patent introduces dynamic positioning capability for the acoustic sensor, allowing it to move to optimal positions for different workpiece materials. This dynamic feature improves detection accuracy across various materials while adding controlled complexity to the installation structure through motorized or automated positioning mechanisms.
Solution Approach 2:
The system incorporates feedback mechanisms that monitor the quality of acoustic signals and automatically adjust the sensor position to optimize detection accuracy. This feedback loop ensures high measurement precision for different workpiece materials while managing device complexity through intelligent control algorithms.
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 device enhances the accuracy of processing state detection by dynamically adjusting the sound collecting unit's position based on signal analysis, ensuring optimal signal quality and maintaining detection precision across different workpiece materials.
Implementation Method 1
a sound collecting unit to measure sound while a workpiece is being processed by laser processing
Implementation Method 2
laser ablation starts to occur when a change in an acoustic wave output obtained by measuring sound (acoustic wave) produced during laser processing of a workpiece
Data Source
AI summary
A processing state detecting device for detecting a processing state of a workpiece processed by laser processing includes: a sound collecting unit that measures sound while the workpiece is being processed by laser processing; an installation position evaluating unit that determines whether an installation position of the sound collecting unit needs to be changed, on the basis of the sound measured by the sound collecting unit; and an evaluation result informing unit that provides information on a result of evaluation of the installation position evaluating unit.