Optical Measurement Device Distance Correction Waveform Analysis
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Solution Overview
Problem
Optical measurement devices face significant errors in distance measurement due to distortions in the light reception amount distribution signal caused by aberrations in the optical system, leading to inaccuracies in measured distances.
Innovation Solution
An optical measurement device and method that corrects measured distances using predefined characteristic values from the light reception amount distribution signal, leveraging correlative relationships between these values and measurement errors, allowing for precise error reduction even with distortion present.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If distance is measured based on light reception amount distribution signal, then measurement can be performed, but measurement error increases due to optical system aberration
Solution Approach 1:
The patent applies feedback by using the measured waveform characteristics (slope, half-value width, peak position) to calculate correction values that are fed back to adjust the measured distance. The correction amount is determined based on the deviation of waveform characteristics from reference values, creating a closed-loop correction system that improves measurement accuracy while maintaining system simplicity
Solution Approach 2:
The patent changes parameters by using multiple waveform characteristics (slope, half-value width, peak position) instead of relying on a single parameter for measurement. By analyzing multiple parameters of the light reception amount distribution signal and combining their correction effects, the system achieves better measurement accuracy without adding complex optical components
2Measurement precision
If correction based on multiple waveform characteristics is implemented, then measurement accuracy improves, but device complexity increases
Solution Approach 1:
The system applies self-service by using the waveform characteristics of the measurement signal itself to perform correction, without requiring external calibration data or additional reference measurements. The slope, half-value width, and peak position of the measured signal provide self-contained information for calculating correction amounts, eliminating the need for separate calibration procedures or additional hardware
Solution Approach 2:
The patent applies universality by using the same light reception amount distribution signal for both measurement and correction purposes. The waveform characteristics extracted from the signal serve multiple functions: determining the measured distance, calculating correction amounts for multiple parameters, and providing reference values for comparison, all without requiring additional signals or measurements
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 solution effectively reduces measurement errors by using correlative relationships to correct distances based on waveform characteristics like slope, half-value width, and peak light reception amount, enhancing precision and simplifying the optical system configuration.
Implementation Method 1
an optical system, which condenses reflected lights reflected by a target
Implementation Method 2
an optical system, which condenses reflected lights reflected by a target
Implementation Method 3
a light reception portion, which is configured in a manner that each of a plurality of pixels is capable of detecting a light reception amount
Data Source
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AI summary
An optical measurement device (100) is provided which includes: a light source (10), which emits lights; a sensor head (30), which condenses reflected lights reflected by a target (TA); a light reception portion (40), which is configured in a manner that each of a plurality of pixels is capable of detecting a light reception amount, and which obtains a light reception amount distribution signal of each pixel for the condensed reflected lights; a measurement portion (51), which measures a distance from the optical measurement device (100) to the target (TA) based on the light reception amount distribution signal; and a correction portion (52), which corrects the measured distance that is measured based on a predefined characteristic value in a waveform of the light reception amount distribution signal. An optical measurement method which uses the optical measurement device (100) is also provided.