Dust Measuring Apparatus Dynamic Range Adjustment
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Solution Overview
Problem
Conventional dust measuring apparatuses have a limited range of measurable dust concentrations, leading to reduced measurement precision for both low- and high-concentration dust, resulting in errors and decreased reliability.
Innovation Solution
A dust measuring apparatus with a controller that varies the effective measurement range by adjusting the impedance of the signal received from a light detector, allowing for expansion or contraction of the measurable range based on detection values, and a mobile terminal for controlling the apparatus to set and adjust this range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the dust concentration is below the reference concentration range, then the light detector can detect scattered light, but the strength of the detected signal becomes too low, lowering measurement precision for low-concentration dust
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the effective measurement range based on the detected signal strength. When the signal strength is too low (indicating low dust concentration), the system expands the effective measurement range to accommodate weaker signals, thereby improving measurement precision for low-concentration dust without losing the ability to detect even weaker concentrations.
2Measurement precision
If the dust concentration is above the reference concentration range, then the light detector can detect scattered light, but the strength of the detected signal becomes too high, lowering measurement precision for high-concentration dust
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the effective measurement range based on the detected signal strength. When the signal strength is too high (indicating high dust concentration), the system expands the effective measurement range to accommodate stronger signals, thereby improving measurement precision for high-concentration dust without losing the ability to detect even stronger concentrations.
3Reliability
If the effective measurement range is fixed, then the device structure is simple, but the range of measurable dust concentrations is limited, reducing reliability for concentrations outside the range
Solution Approach 1:
The patent applies dynamics by making the effective measurement range variable rather than fixed. The controller dynamically adjusts the effective measurement range based on the detected signal strength, allowing the system to adapt to different dust concentration levels. This dynamic adjustment improves reliability for measurements outside the original fixed range while maintaining relatively simple circuit configuration through software-based control.
4Adaptability or versatility
If the effective measurement range is widened, then the range of measurable dust concentrations increases, but the impedance of the signal received from the light detector must be varied, complicating the circuit configuration
Solution Approach 1:
The patent applies parameter changes by adjusting the impedance of the signal received from the light detector to widen the effective measurement range. The controller varies the impedance based on the detected signal strength, enabling the system to measure a broader range of dust concentrations. This parameter adjustment approach increases adaptability while keeping the circuit configuration relatively simple by using controlled impedance variation rather than complex circuit redesign.
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
Enhances measurement precision and reliability by widening the range of measurable dust concentrations, allowing for accurate detection of both low- and high-concentration dust, and provides user convenience through adjustable settings and guide information.
Implementation Method 1
a light detector for detecting light scattered from the dust in the flow channel and converting the same into an electrical signal
Data Source
AI summary
Disclosed herein are a dust measuring apparatus and a mobile terminal for controlling the same. The dust measuring apparatus includes a flow channel defining unit for defining a flow channel allowing a fluid containing dust to move through, a light emitter for emitting light into the flow channel, a light detector for detecting light scattered from the dust in the flow channel and converting the same into an electrical signal, and a controller for controlling the flow channel defining unit, the light emitter and the light detector. The controller is configured to verify whether a detection value received from the light detector is within an effective measurement range, vary the effective measurement range when the detection value is outside the effective measurement range, and measure, when the detection value is within the varied effective measurement range, a dust concentration based on the detection value.