Flame Detector Light Guide System for Temperature Measurement
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Solution Overview
Problem
Current flame detectors lack optical systems suitable for flame temperature measurement in thermal power generation and petrochemical industries.
Innovation Solution
A flame detector with a light guide system having a specific detection angle between 0.5 degrees and 3 degrees, comprising a first and second hole along the optical axis, configured to receive and transmit light from a flame, allowing for precise temperature measurement using a temperature sensor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional optical system is used in flame detectors, then the device can detect flame presence, but it cannot accurately measure flame temperature due to excessive light intensity saturating the sensor
Solution Approach 1:
The patent changes the optical parameters of the system by introducing a light guide system with specific geometric parameters (detection angle between 0.5-3 degrees, light path length, hole sizes at first and second ends). These parameter changes attenuate the light intensity from the flame before it reaches the sensor, preventing saturation while maintaining temperature measurement capability through the relationship between detection angle, light path length, and hole dimensions.
2Illumination intensity
If the detection angle is increased to capture more light, then the light intensity reaching the sensor increases, but the sensor becomes saturated and cannot measure temperature accurately
Solution Approach 1:
The patent establishes an optimal range for the detection angle (0.5-3 degrees) that balances light capture and sensor protection. By controlling the detection angle within this specific range, along with coordinating the light path length and hole sizes, the system achieves sufficient light intensity for measurement while preventing sensor saturation, thus resolving the contradiction between capturing enough light and avoiding overload.
3Illumination intensity
If the light path length is increased to reduce light intensity, then the detection angle can be smaller, but the device complexity and size increase
Solution Approach 1:
The patent optimizes the light path length as one of several coordinated parameters in the light guide system. Rather than relying solely on increasing light path length to attenuate light, the system uses a combination of detection angle (0.5-3 degrees), light path length, and hole size optimization. This multi-parameter approach achieves the desired light attenuation with a more compact and simpler overall device structure compared to simply extending the light path.
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
Enables accurate flame temperature measurement by selecting a detection angle that prevents excessive light intensity, ensuring the sensor assembly is not saturated and simplifies the design, allowing for precise temperature determination.
Implementation Method 1
a light path being formed between the first end and the second end and extending along an optical axis; a first hole disposed at the first end, extending along the optical axis and forming a part of the light path, the first hole being configured to receive light emitted by a flame to be detected
Data Source
AI summary
Embodiments of the present disclosure relate to a flame detector. The flame detector comprises a light guide system including a first end and a second end opposite to the first end, a light path being formed between the first end and the second end and extending along an optical axis; a first hole disposed at the first end, extending along the optical axis and forming a part of the light path, the first hole being configured to receive light emitted by a flame to be detected; and a second hole disposed at the second end, extending along the optical axis and forming a part of the light path, sizes of the first and second holes and a length of the light path being configured such that a detection angle of the light guide system is between 0.5 degrees and 3 degrees.