Unitary Reflective Insert for Smoke Detector Optical Alignment
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Solution Overview
Problem
Existing smoke detector optical systems face challenges with complex assembly processes, low scalability, high component counts, and susceptibility to improper alignment, which affects detection performance and reliability.
Innovation Solution
The integration of multiple reflective surfaces into a single unitary reflective component insert, which can be pre-assembled and precisely aligned with the chamber base and optical emitters/receivers, simplifying the assembly process and enhancing scalability and alignment accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple separate reflecting components or lightguides are used to direct light, then light direction precision is improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent combines multiple separate reflecting components into a single integrated reflective component insert that contains multiple reflective surfaces. This single insert performs the function of multiple mirrors, reducing the total number of components while maintaining precise light direction capabilities. The reflective surfaces are formed as integral parts of the insert structure, eliminating the need for separate mirror assemblies.
Solution Approach 2:
The reflective component insert serves multiple functions simultaneously: it acts as a structural support element, provides multiple reflective surfaces for light direction, and defines the optical chamber geometry. This multi-functional design reduces the overall component count while maintaining the precision required for optical particle detection.
2Reliability
If multiple small mirrors are placed in different locations, then light collection efficiency is improved, but alignment precision and reliability deteriorate
Solution Approach 1:
By integrating multiple reflective surfaces into a single rigid insert, the patent eliminates alignment issues between separate mirrors. The reflective surfaces are fixed relative to each other by the insert's structure, ensuring consistent and reliable light collection geometry without requiring precise manual alignment of multiple separate components.
Solution Approach 2:
The reflective surfaces are pre-positioned and fixed in the correct orientations during insert manufacturing. This preliminary positioning eliminates the need for complex alignment procedures during final assembly, ensuring that the optical paths are correctly established before the device is put into service.
3Extent of automation
If custom surface mounted device optical blocks are used, then assembly automation is improved, but scalability and adaptability worsen
Solution Approach 1:
The patent segments the optical system into modular components: the reflective component insert, the chamber base, and the SMD optical emitters/receivers. This segmentation allows the insert to be manufactured and pre-aligned separately, then easily integrated into different detector configurations. The modular design enables scalability to dual angle/dual wavelength configurations by adding or modifying emitters and receivers while keeping the reflective insert as a stable reference structure.
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 cost-effective, scalable, and reliable smoke detection systems with improved optical sensitivity and immunity to nuisance sources, while reducing human error and manufacturing complexity.
Implementation Method 1
The two prisms have a total-reflection surface and a lens that causes light to be directed and condensed to and from the sensing zone
Implementation Method 2
The two prisms have a total-reflection surface and a lens that causes light to be directed and condensed to and from the sensing zone
Implementation Method 3
sense a smoke condition indicative of a fire occurring in the facility
Data Source
AI summary
Devices, systems, and methods for providing an optical chamber base for smoke detection with integrated reflective surfaces for optical particle detection are described herein. One unitary reflective component insert includes a unitary reflective component insert body having a non-reflective portion and a reflective portion and wherein the reflective portion forms two emitter mirrors and a receiver mirror, wherein the emitter mirrors are shaped to direct light emitted from emitters positioned below the emitter mirrors toward a scattering zone of the optical chamber.