Object Detection Device Using Infrared and Visible Light Segmentation
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Solution Overview
Problem
Existing object detection technologies using infrared and LED light face challenges with sensitivity stability, erroneous detection due to high directivity, and illuminance issues, leading to unreliable detection of objects on transparent substrates.
Innovation Solution
A detection device employing infrared and LED light sources with adjusted wavelengths and emission directions to maintain constant sensitivity, reduce erroneous detection, and detect objects within a predetermined distance by controlling the illuminance and directivity of light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If high directivity light sources are used to improve detection precision, then measurement precision is improved, but erroneous detection increases due to unstable sensitivity
Solution Approach 1:
The patent divides the single light source into two separate light sources: an infrared light source and a visible light source. Each light source has its own light receiver dedicated to detecting reflected light from that specific wavelength range. This segmentation allows independent optimization of each light source's characteristics and prevents interference between different wavelength detections, thereby maintaining stable sensitivity while achieving precise object detection.
Solution Approach 2:
The patent introduces a wavelength dimension by using multiple light sources emitting at different wavelengths (infrared and visible light). This dimensional expansion allows the system to detect objects across multiple spectral ranges simultaneously, improving both detection precision and reliability by capturing reflected light characteristics that vary with wavelength.
2Measurement precision
If infrared light is used to improve detection capability on transparent substrates, then detection precision is improved, but erroneous detection occurs due to light interference
Solution Approach 1:
The patent separates infrared light detection and visible light detection into independent channels with dedicated light sources and receivers. This segmentation prevents cross-interference between different wavelength detections, allowing accurate detection on transparent substrates by analyzing reflected light characteristics specific to each wavelength range without contamination from other wavelengths.
Solution Approach 2:
The patent utilizes the parameter of wavelength by employing multiple light sources with different wavelengths (infrared and visible). Objects on transparent substrates reflect different proportions of infrared and visible light, and by measuring reflected light intensity across these different wavelength parameters, the system can distinguish true objects from false detections with high accuracy.
3Reliability
If multiple light sources are used to improve detection reliability, then sensitivity stability is improved, but device complexity increases
Solution Approach 1:
The patent divides the detection system into independent modular units, each consisting of a light source and its corresponding light receiver. This modular segmentation maintains reliability through multiple wavelength channels while managing complexity by creating self-contained functional blocks that can be independently configured and maintained.
Solution Approach 2:
The patent employs light sources and receivers that can detect reflected light across different wavelength ranges, creating a multi-functional detection system. The infrared and visible light channels work together to provide comprehensive object detection capability, where each component serves multiple purposes: detection precision, sensitivity stability, and interference rejection.
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 erroneous detection and enhances the reliability of object detection on transparent substrates by stabilizing sensitivity and controlling light distribution, allowing for accurate detection of objects within a specific range.
Implementation Method 1
a first light source configured to emit infrared as first light in a first direction
Implementation Method 2
receive the first light reflected from the object
Implementation Method 3
a second light source configured to emit second light in a second direction different from the first direction
Implementation Method 4
receive the portion of the second light reflected from the object
Data Source
AI summary
A detection device configured to detect an object includes a first light source configured to emit infrared as first light in a first direction, a second light source configured to emit second light in a second direction different from the first direction, a shield to shield a portion of an optical path from the second light source, to allow a portion of the second light to pass, a light-receiving device configured to receive the first light reflected from the object and the portion of the second light reflected from the object, and circuitry configured to detect presence or absence of the object based on reception of reflected light by the detector. The second light is different from the first light.