Particulate Sensor Wind Speed Correction Map
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Solution Overview
Problem
Existing particulate sensors are influenced by wind speed, leading to reduced accuracy in particulate concentration detection, as the sensor output value changes with wind speed variations even if the actual particulate concentration remains constant.
Innovation Solution
A particulates detector with a correction section that adjusts the sensor output value to account for wind speed, using a correction map to determine a corrected value that suppresses the influence of wind speed, ensuring accurate particulate concentration measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the sensor output value is used directly as the particulate concentration indicator, then the measurement process is simple, but the measurement precision deteriorates due to wind speed influence
Solution Approach 1:
The patent changes the parameter being measured from the raw sensor output value to a corrected value that accounts for wind speed. The correction section modifies the sensor output by applying a correction amount determined from the relationship between sensor output and wind speed, thereby transforming the measurement parameter to eliminate wind speed influence and improve accuracy
Solution Approach 2:
The patent implements a feedback mechanism where the correction section continuously monitors the sensor output value and wind speed, determines the appropriate correction amount based on their relationship, and applies this correction to generate an accurate particulate concentration value. This closed-loop feedback process ensures accurate measurement while maintaining operational simplicity
2Reliability
If the wind speed influence is not corrected, then the device complexity remains low, but the reliability of particulate concentration measurement deteriorates
Solution Approach 1:
The patent transforms the unreliable sensor output value into a reliable particulate concentration measurement by applying a correction based on the established relationship between sensor output and wind speed. This parameter transformation ensures that the final measurement reliably reflects actual particulate concentration regardless of wind speed variations
Solution Approach 2:
The correction section continuously adjusts the sensor output based on real-time wind speed conditions, creating a feedback loop that maintains measurement reliability. The system automatically compensates for wind speed effects without requiring complex manual calibration or adjustment
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 correction section effectively removes the impact of wind speed on particulate concentration detection, allowing for stable and accurate measurement of particulate concentration, even at varying wind speeds.
Implementation Method 1
an optical particulate sensor that detects a particulate concentration by applying light and receiving the scattered light
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The particulates detector detects a particulate concentration at a predetermined sensed position. The particulates detector includes: an optical particulate sensor (321) that outputs a sensor output value (Vs) depending on the particulate concentration at the sensed position; and a correction section (322) that determines a corrected value (Vc) by correcting the sensor output value as a value indicating the particulate concentration. In a case where the sensor output value is fixed, the correction section performs the determination of the corrected value, such that the particulate concentration indicated by the corrected value decreases with decrease in wind speed at the sensed position.