Distance Measurement Device Multipath Error Correction
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Solution Overview
Problem
Existing distance measurement devices face challenges in accurately measuring distances due to the multipath phenomenon, which causes errors in environments with high reflectance materials, requiring labor-intensive and time-consuming correction processes.
Innovation Solution
A distance measurement device equipped with an irradiation unit, a light receiving sensor, and a control unit that stores correction formulas and applicable distance ranges, allowing for automatic selection and application of the appropriate correction formula to correct measured distances based on the detected exposure amount.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the conventional technology uses multiple measurement samples and repeated operations to generate correction formulas, then the distance measurement accuracy is improved, but the time consumption and operational complexity increase significantly
Solution Approach 1:
The system pre-calculates and stores multiple correction formulas corresponding to different distance ranges before actual measurement. By preparing correction data in advance through automated calculations rather than requiring operators to perform repeated measurements during operation, the system eliminates time-consuming manual correction processes while maintaining measurement accuracy.
Solution Approach 2:
The distance measurement device automatically selects and applies the appropriate correction formula based on the measured distance range without requiring operator intervention. The system self-corrects measurement errors by autonomously retrieving pre-prepared correction data, eliminating the need for manual operation and significantly reducing time consumption.
2Measurement precision
If the conventional technology requires operators to repeatedly place measurement samples and perform measurements, then accurate correction data is obtained, but the operational complexity and labor intensity increase
Solution Approach 1:
The system automatically performs the correction formula generation process by internally calculating correction values based on pre-stored reference data. The device eliminates the need for operators to manually place measurement samples and repeatedly perform measurements, as the system self-generates correction formulas through automated computations, thereby maintaining accuracy while dramatically simplifying operation.
Solution Approach 2:
The patent replaces manual mechanical operations (placing samples, adjusting device positions) with automated computational processes. The correction formulas are generated through algorithmic calculations rather than physical measurement operations, substituting mechanical labor with electronic computation to achieve both accuracy and ease of operation.
3Device complexity
If the system uses a single correction formula for all distance ranges, then the device complexity is reduced, but the measurement accuracy across different distances deteriorates
Solution Approach 1:
The correction system divides the measurement distance range into multiple segments, with each segment having its own optimized correction formula. By segmenting the distance ranges and applying appropriate correction formulas to each segment, the system achieves high measurement accuracy across all distances while maintaining manageable complexity through structured organization of correction data.
Solution Approach 2:
Different correction formulas are applied to different distance ranges based on local characteristics of measurement errors in each range. Each segment receives a correction formula specifically optimized for its local conditions, ensuring high accuracy for each distance range rather than using a one-size-fits-all approach, thereby maintaining precision without excessive complexity.
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
This solution enables efficient and accurate correction of distance errors caused by multipath phenomena without the need for repetitive operator interventions, reducing the time and effort required for generating correction formulas.
Implementation Method 1
an irradiation unit that irradiates measurement light onto an object to be measured
Implementation Method 2
a light receiving sensor that receives reflected light from the object to be measured and detects an exposure amount based on the reflected light
Data Source
AI summary
A distance measurement device comprises an irradiation unit that irradiates a measurement light onto an object to be measured, a light receiving sensor that receives reflected light from the object to detect an exposure amount based on the reflected light, a memory unit that stores correction information indicating a correction formula set including a plurality of correction formulas and an applicable distance range of each correction formula, and a distance calculation unit that calculates the measurement distance to the object to be measured based on the exposure amount. The distance calculation unit performs, based on the correction information stored in the memory unit, a distance correction calculation to calculate a corrected measured distance by correcting the measured distance using the correction formula corresponding to the applicable distance range in which the measured distance is included among the plurality of correction formulas in the correction formula set.