Multi-Directional Light Source Detection Device with Black Shielding Plate
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Solution Overview
Problem
Conventional detection devices using reflective photosensors can only detect objects in regions below the light source, limiting their detection capability to areas directly beneath the light emission.
Innovation Solution
A detection device with multiple light sources emitting light in different directions, combined with a black shielding plate and transparent members to expand the detectable region, utilizing both visible and infrared light to enhance detection accuracy and range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a single light source is used emitting light in one direction, then the device structure is simple, but the detection region is limited to only below the light source
Solution Approach 1:
The patent divides the light source into multiple independent light-emitting units (first light source, second light source, etc.) that can emit light in different directions. Each light source is configured to illuminate a specific region, and together they cover a broader detection area. This segmentation allows the system to expand detection coverage without requiring a single complex light source.
Solution Approach 2:
The patent transitions from a single-direction light emission (one-dimensional coverage) to multi-directional light emission by arranging light sources at different orientations and positions. The light sources emit light in different directions (e.g., downward, sideways, upward), creating three-dimensional light coverage that expands the detection region throughout the entire detection chamber.
2Area of stationary object
If multiple light sources emitting in different directions are used, then the detection region is expanded, but the device structure becomes more complex
Solution Approach 1:
The patent combines multiple light sources, a black shielding plate, and transparent members into an integrated optical system. The black shielding plate serves as both a structural component and an optical element that directs light, while transparent members are incorporated into the housing to allow light passage. This merging reduces overall system complexity by making components multi-functional.
Solution Approach 2:
The black shielding plate performs multiple functions: it shields the light source substrate, directs light emission directions, and structures the optical path. Transparent members serve both as protective covering and as light transmission windows. This multi-functionality reduces the need for separate dedicated components, simplifying the overall device structure despite using multiple light sources.
3Measurement precision
If only visible light is used for detection, then the detection system is simple, but the detection accuracy may be reduced due to environmental interference
Solution Approach 1:
The patent changes the wavelength parameter of light by using both visible light sources and infrared light sources simultaneously. This multi-wavelength approach allows the system to detect objects based on different optical properties, improving detection accuracy by overcoming limitations of single-wavelength detection and reducing false positives from environmental factors.
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 allows for the detection of objects in a broader area beyond the direct emission zone, improving detection accuracy and reducing false positives by using a combination of visible and infrared light sources with a black shielding plate and transparent members.
Implementation Method 1
A transparent member is configured to pass the first light and the second light to outside of the outer housing.
Implementation Method 2
A black shielding plate surrounds a light source substrate including the first light source, the second light source, and the light receiver.
Implementation Method 3
A light receiver is configured to receive one of a first reflected light of the first light and a second reflected light of the second light.
Implementation Method 4
a reflective photosensor having a light emitting unit and a light receiver
Data Source
AI summary
A detection device includes a first light source configured to emit a first light in a first direction, and a second light source configured to emit a second light in a second direction different from the first direction. A light receiver is configured to receive one of a first reflected light of the first light and a second reflected light of the second light. A black shielding plate surrounds a light source substrate including the first light source, the second light source, and the light receiver. An outer housing surrounds the black shielding plate. A transparent member is configured to pass the first light and the second light to outside of the outer housing.