Water Quality Analyzer Liquid Detection Mechanism
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Solution Overview
Problem
In online total nitrogen measuring devices, liquid shortages or leaks can occur, leading to incomplete sample collection and delayed detection of abnormalities, which hampers precise measurement of total nitrogen concentration.
Innovation Solution
A water quality analyzer is equipped with a detection system that monitors light transmissivity changes in the measuring cell to determine if a predetermined amount of liquid sample has been correctly fed, using a semiconductor laser element and photodiode to identify abnormal fluctuations in light intensity, enabling early detection of liquid shortages or leaks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If a conventional online total nitrogen measuring device is used, then automated measurement is achieved, but liquid shortages or leaks cannot be detected timely
Solution Approach 1:
The patent applies preliminary action by introducing a light detection system that monitors the measuring cell before the actual nitrogen measurement occurs. The light source and photodiode detect liquid presence and volume in advance, allowing the system to identify liquid shortages or leaks before they affect the measurement process, thus maintaining reliability while preserving automation.
Solution Approach 2:
The patent uses light as an intermediary substance to detect liquid abnormalities. The light source emits light through the measuring cell, and the photodiode detects changes in light transmission caused by liquid presence or volume changes. This intermediary detection method enables timely identification of liquid issues without interfering with the automated measurement process.
2Measurement precision
If light detection is added to detect liquid abnormalities, then detection accuracy improves, but device complexity increases
Solution Approach 1:
The patent extracts the detection function into a separate, dedicated light detection system consisting of a light source and photodiode. This modular approach allows the detection mechanism to be added independently from the main nitrogen measurement system, improving detection accuracy while minimizing the increase in overall device complexity through functional separation.
Solution Approach 2:
The light detection system serves multiple functions: it detects liquid presence, monitors liquid volume, and can identify leaks. By using a single light source and photodiode combination for multiple detection purposes, the patent achieves high measurement precision without proportionally increasing device complexity, as the same components handle various detection tasks.
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 allows for quick identification of liquid-related abnormalities, ensuring accurate measurement of total nitrogen concentration by confirming the presence and quantity of the liquid sample in the measuring cell.
Implementation Method 1
monitors light transmissivity changes in the measuring cell to determine if a predetermined amount of liquid sample has been correctly fed, using a semiconductor laser element and photodiode to identify abnormal fluctuations in light intensity
Implementation Method 2
a predetermined amount (a+b+c+d) of the prepared liquid sample S1 is transferred to the UV photo-oxidation decomposition process... irradiated with ultraviolet rays under the conditions of being heated at 70 degrees or higher so as to be converted to a reacted liquid sample S2 where the nitrogen compounds in the prepared liquid sample S1 has reacted with the ultraviolet rays and oxidatively decomposed to nitrate ions
Data Source
AI summary
The invention provides a water quality analyzer with which an abnormality in the collection of water can be determined by detecting whether or not a predetermined amount of a liquid sample has been fed into a sample container. The analyzer is formed of: a sample container 53 into which a liquid sample can be introduced through a liquid sample introduction port 53e formed in a lower portion of the container 53; a light source unit 51 for irradiating the container 53 with light; and a detection unit 52 for detecting light that has passed through the container 53, and further includes a determination unit for determining whether or not a predetermined amount of the liquid sample has been contained in the container 53 on the basis of the change in the light intensity detected by the detection unit 52 when the liquid sample is fed into the container 53.