Laser Measurement Calibration Using Contact-Based Error Correction
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Solution Overview
Problem
Contact measurement methods cause surface damage and non-contact measurement technologies suffer from environmental interference and material-specific errors, leading to inaccurate laser measurement results.
Innovation Solution
A laser measurement calibration method that uses a contact sensing device to correct errors in non-contact measurement by calibrating with a standard calibration element of the same material, accounting for surface roughness, reflectivity, and environmental factors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If contact measurement is used, then measurement precision is improved, but the surface is easily damaged and productivity decreases
Solution Approach 1:
The patent replaces the mechanical contact measurement system with a non-contact laser measurement system. The laser beam scans the object surface and calculates distance and size based on reflected signals, eliminating mechanical contact while maintaining measurement capability. This substitution resolves the contradiction by removing the surface damage issue and enabling continuous sampling without physical wear.
2Productivity
If non-contact laser measurement is used, then productivity and measurement speed are improved, but measurement precision deteriorates due to environmental interference and material properties
Solution Approach 1:
The patent performs preliminary calibration by measuring a standard calibration element with both contact and non-contact sensing devices before measuring the actual object. The calibration value calculated from the difference between contact measurement (high precision) and non-contact measurement (low precision) is used to correct subsequent non-contact measurements. This preliminary calibration action compensates for environmental interference and material property effects, improving measurement precision while maintaining high productivity.
3Adaptability or versatility
If non-contact measurement is used on different materials, then adaptability is improved, but measurement precision deteriorates due to surface roughness, reflectivity, and transparency variations
Solution Approach 1:
The patent changes the measurement parameter by introducing a calibration value that accounts for material-specific properties such as surface roughness, reflectivity, and transparency. By measuring a standard calibration element made of the same material as the object being measured, the system determines a correction factor that compensates for material variations. This parameter change enables accurate measurements across different materials while maintaining adaptability.
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
Improves the accuracy of non-contact laser measurements by correcting errors, ensuring precise and reliable distance and size calculations.
Implementation Method 1
In non-contact measurement, such as laser, the laser beam is used to scan the measured object, and the distance and size are calculated based on the reflected signal
Implementation Method 2
the laser beam is used to scan the measured object, and the distance and size are calculated based on the reflected signal
Data Source
AI summary
A laser measurement calibration method is adapted to establish in a software program and executes the following steps after read by a computer: measuring a standard calibration element with a contact sensing device to obtain a measurement value; measuring the standard calibration element with at least one non-contact sensing device to obtain at least one surface distance value of the standard calibration element; calculating a calibration value according to the measurement value of the standard calibration element and the at least one surface distance value of the standard calibration element; measuring an object to be measured with the at least one non-contact sensing device to obtain at least on surface distance value of the object to be measured; and calculating a measurement value of the object to be measured according to the calibration value and at least one surface distance value of the object to be measured.