Two-Dimensional Detection Using Light Reception and Distance Thresholds
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Solution Overview
Problem
Conventional detection systems fail to properly detect objects when relying solely on light reception quantity or distance, leading to erroneous detections due to similar reflections from background and object surfaces.
Innovation Solution
A detection system that combines light reception quantity and distance measurements, using a threshold value range set by user input on a touch-sensitive display to differentiate between object and background reflections, allowing for accurate detection by considering both parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If only light reception quantity is used for detection, then the detection device can operate with simpler measurement, but detection accuracy deteriorates when background reflections are similar to object reflections
Solution Approach 1:
The patent transitions from one-dimensional detection (light reception quantity only) to two-dimensional detection by adding distance as a new dimension. The threshold value range is defined in a two-dimensional space combining light reception quantity and distance, enabling accurate object detection even when background reflections have similar light reception characteristics, by utilizing the additional spatial information from distance measurement.
2Device complexity
If only distance is used for detection, then the detection device can operate with simpler measurement, but detection accuracy deteriorates when light reception quantity provides additional differentiation information
Solution Approach 1:
The patent transitions from one-dimensional detection (distance only) to two-dimensional detection by adding light reception quantity as a new dimension. The threshold value range is defined in a two-dimensional space combining light reception quantity and distance, enabling accurate object detection even when distance alone is insufficient, by utilizing the additional information from light reception characteristics.
3Measurement precision
If both light reception quantity and distance are used for detection, then detection accuracy improves, but device complexity increases due to setting and processing two parameters
Solution Approach 1:
The system automatically determines the threshold value range in the two-dimensional space of light reception quantity and distance based on acquired measurement data, without requiring manual setting by users. The detection device performs self-calibration by analyzing the relationship between light reception quantity and distance data to establish appropriate threshold values, thereby reducing operational complexity while maintaining high detection accuracy.
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 reliable detection of objects by using a combination of light reception quantity and distance, preventing false positives from background reflections and ensuring accurate object identification.
Implementation Method 1
a light receiving unit that receives reflection light of the light
Implementation Method 2
a distance acquiring unit that acquires a distance between a position at which the light is reflected and the detection object
Data Source
AI summary
A detection system includes a detection device and a display device. The detection device includes a light projecting unit that projects light to a detection object, a light receiving unit that receives reflection light of the light, a light reception quantity acquiring unit that acquires a light reception quantity, and a distance acquiring unit that acquires a distance between a position at which the light is reflected and the detection object. The control device includes a setting unit that sets a threshold value range which is a combination of a threshold value of the light reception quantity and a threshold value of the distance, a detector that detects the detection object based on whether the light reception quantity and the distance belong to the threshold value range, and a display unit that displays correspondence information in which the light reception quantity and the distance are related to each other.