Doughnut-Shaped Smoke Detector Chamber for Multi-Angle Scattering
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Solution Overview
Problem
Existing fire detectors, such as photoelectric smoke detectors, frequently generate false alarms due to non-fire particles like cooking smoke, cigarette smoke, and dust, leading to reduced reliability and potential missed fire detections.
Innovation Solution
A smoke detecting apparatus with a doughnut-shaped chamber containing multiple light emitting and receiving units, which measure the scattering degree of light at specific angles to differentiate between fire and non-fire particles based on intensity and angle-specific scattering patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a photoelectric smoke detector uses a single light emitting unit and a single light receiving unit, then the device complexity is low, but the measurement precision of smoke particle detection is insufficient leading to false alarms
Solution Approach 1:
The detector is segmented into multiple light emitting units and multiple light receiving units arranged at different positions and angles within the chamber. This segmentation allows simultaneous measurement of light scattering at multiple angles, improving smoke particle detection accuracy while maintaining a compact structure through integrated arrangement
Solution Approach 2:
The invention transitions from single-point detection to multi-angle spatial detection by arranging light emitting and receiving units at different angular positions around the chamber. This dimensional expansion enables measurement of scattering patterns in multiple directions, enhancing particle characterization and reducing false alarms
2Measurement precision
If the detector uses multiple light emitting units and multiple light receiving units spaced apart, then the measurement precision for angle-specific scattering degree is improved, but the device complexity increases
Solution Approach 1:
Multiple light emitting units and multiple light receiving units are merged into a single integrated chamber structure. The units are arranged in a coordinated manner where light emitted from one unit can be detected by multiple receiving units at different angles, combining multiple measurement functions into one compact detection system
Solution Approach 2:
The chamber structure serves multiple functions: it houses the light emitting units, light receiving units, and provides the optical path for scattering measurement. The same chamber space accommodates multiple measurement channels, making the structure multi-functional and reducing overall device 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
The apparatus accurately distinguishes between fire and non-fire conditions, reducing false alarms and enhancing the reliability of fire detection by analyzing the unique scattering characteristics of fire smoke.
Implementation Method 1
detect light scattered by smoke particles
Data Source
AI summary
Provided is a smoke detector chamber according to an embodiment disclosed in the present document, the smoke detector chamber including a scattering degree measuring device in a doughnut shape, which is provided with an intake port through which smoke particles are introduced or discharged, a plurality of light emitting units fixed to the scattering degree measuring device, each of which faces an area inside the intake port irradiated with light thereof and emits light, and a plurality of light receiving units that are fixed to the scattering degree measuring device such that light receiving areas thereof face inside of the intake port and, after the light is emitted, detect light scattered by the smoke particles, wherein the plurality of light emitting units and the plurality of light receiving units are spaced apart from each other to detect a specified angle-specific scattering degree.