Smoke Detector Temperature Calibration via Oscillator Feedback
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Solution Overview
Problem
Conventional smoke detection devices face inaccuracies due to high temperature environments, which affect the detection of low-concentration smoke, leading to false alarms or delayed responses.
Innovation Solution
The design includes a housing with a piercing hole, a smoke collector, an optical detector, and a cover plate that creates a channel for gaseous matter to flow into the smoke collector while using a heat dissipation element and an exhausting hole to manage temperature, along with oscillators to calibrate detection results based on environmental temperature changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the smoke detection device operates in a high temperature environment, then the device can detect smoke in hot conditions, but the detection accuracy deteriorates due to temperature affecting smoke concentration measurement
Solution Approach 1:
The patent applies parameter changes by using oscillators whose oscillation parameters vary with temperature to serve as reference for calibration. The system changes the operational parameters of the oscillators based on environmental temperature, allowing the detection device to adapt to high temperature conditions while maintaining accurate smoke concentration measurements through comparative calibration against the temperature-dependent oscillator references.
Solution Approach 2:
The patent implements feedback through a calibration mechanism that uses oscillators as temperature-sensitive references. The system continuously monitors the oscillation parameters and uses this feedback to adjust and calibrate the smoke detection readings, compensating for temperature-induced drift and maintaining measurement accuracy in varying thermal conditions.
2Device complexity
If conventional smoke detection devices are used without temperature calibration, then the device structure remains simple, but detection accuracy deteriorates in high temperature environments
Solution Approach 1:
The patent applies self-service by enabling the detection device to automatically calibrate itself using internal oscillators as temperature references. The system uses its own oscillator components to perform self-calibration without requiring external temperature sensors or complex additional hardware, maintaining structural simplicity while improving detection accuracy through automated temperature compensation.
Solution Approach 2:
The patent implements multi-functionality by using oscillators that serve dual purposes: as timing/clock elements for the device operation and as temperature-sensitive reference elements for calibration. This universal use of the oscillator components allows the system to perform both operational timing and temperature-based calibration functions without adding separate dedicated components, thus maintaining structural simplicity.
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 configuration effectively cools the device, enhances detection accuracy, and reduces hardware costs by eliminating the need for additional temperature sensors, allowing for precise differentiation between fire smoke and other interference.
Implementation Method 1
the optical detector is disposed inside the smoke collector and adapted to detect gaseous concentration inside the smoke collector
Implementation Method 2
the light receiving amount of the light receiver is reduced, and the alarm can be output
Implementation Method 3
a heat dissipation element disposed inside the housing and adapted to absorb heat transmitted into the housing by the gaseous matter
Implementation Method 4
oscillators to calibrate detection results based on environmental temperature changes
Data Source
AI summary
A smoke detection device includes a housing, a smoke collector, an optical detector and a cover plate. The housing has a piercing hole. The smoker collector has a smoke hole, and position of the smoke hole is close to position of the piercing hole. The optical detector is disposed inside the smoke collector and adapted to detect gaseous concentration inside the smoke collector. The cover plate is disposed between the housing and the smoke collector, and used to set a channel from the piercing hole to the smoke hole, so that gaseous matter flows from outside the smoke detection device into the smoke collector through the piercing hole and the smoke hole.