Optoelectronic Smoke Detection with LED Temperature Compensation
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Solution Overview
Problem
Hazard detection systems, particularly those using optoelectronic components, face challenges in accurately determining smoke conditions and handling temperature variations, which can affect the functionality of these components and overall system performance.
Innovation Solution
The system includes a chamber body with a light emitting diode and a light detecting diode, a processing subsystem that determines the smoke condition by analyzing the light detected, and uses thermal resistance data to calculate the temperature of the optoelectronic components and the enclosure space, ensuring consistent operation despite temperature fluctuations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If optoelectronic components are used for smoke detection, then detection capability is improved, but temperature sensitivity causes measurement errors
Solution Approach 1:
The system continuously monitors the forward voltage of the LED and uses this feedback to dynamically adjust the measured light intensity. By establishing a relationship between forward voltage and temperature, the system compensates for temperature-induced variations in optoelectronic component performance, thereby maintaining accurate smoke detection across varying temperature conditions
Solution Approach 2:
The invention changes the electrical parameters (forward voltage, current) of the optoelectronic components as indicators of temperature state. By monitoring these parameter changes and using them to compensate for temperature effects on light emission and detection, the system maintains measurement precision despite temperature fluctuations
2Measurement precision
If temperature compensation is implemented using forward voltage measurement, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The LED serves multiple functions: it acts as both the light source for smoke detection and as a temperature sensor through forward voltage measurement. This multi-functionality eliminates the need for separate temperature sensing components, reducing overall system complexity while maintaining accurate temperature compensation
Solution Approach 2:
The optoelectronic component (LED) provides its own temperature information through its electrical characteristics. By measuring the forward voltage across the LED, the system obtains temperature data from the component itself without requiring external temperature sensors, thereby simplifying the device architecture
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 approach enables precise determination of smoke conditions and maintains reliable operation of optoelectronic components across varying temperatures, enhancing the accuracy and reliability of hazard detection systems.
Implementation Method 1
a light emitting diode operative to emit light into the chamber space, a light detecting diode operative to detect the light emitted into the chamber space
Implementation Method 2
a light detecting diode operative to detect the light emitted into the chamber space
Implementation Method 3
access thermal resistance data indicative of a thermal resistance between a portion of the enclosure space and the one of the light emitting diode and the light detecting diode
Data Source
AI summary
Apparatus, systems, methods, and related computer program products for handling temperature variation with optoelectronic components of a hazard detection system are described herein. A power characteristic of an optoelectronic component of the hazard detection system may be used to determine a temperature of an environment of the hazard detection system. A power characteristic of an optoelectronic component of the hazard detection system may be used to determine a smoke condition of an environment of the hazard detection system. Optoelectronic components of the hazard detection system may be optically coupled to determine a smoke condition of an environment of the hazard detection system. Multiple optoelectronics of the hazard detection system may be operative to detect forward scatter and back scatter of one or more types of light to determine a characteristic of a hazard particle.