Water Alkalinity Detection Using pH Sensing and Air Injection
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Solution Overview
Problem
Existing methods for measuring water alkalinity in aquariums are costly, cause irreversible chemical changes, and require manual handling, leading to water wastage and inconvenience.
Innovation Solution
A water alkalinity detection system that uses a control device to automatically measure and adjust alkalinity by pumping air into reference and external liquids, detecting pH values, and calculating the alkalinity without the need for titration reagents, allowing for reuse of liquids.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If colorimetry titration or acid-base indicator titration is used to measure KH value, then the KH value can be obtained, but the cost increases due to regularly buying acid solution and the measured water undergoes irreversible chemical changes
Solution Approach 1:
The patent extracts the measurement function from the water sample itself by using a separate sensor-based detection method. Instead of adding reagents to the water to be measured, the system uses pH electrodes and control circuits to measure KH values indirectly through pH changes caused by controlled CO2 injection, thereby separating the measurement process from the water sample and avoiding chemical contamination.
Solution Approach 2:
The patent replaces the chemical titration system with an electrochemical sensing system. Instead of using acid-base indicators and titration reactions, the invention employs pH electrodes, voltage detection circuits, and microprocessor-controlled CO2 injection to achieve KH measurement, substituting mechanical/electrical components for chemical reagents.
2Measurement precision
If colorimetry titration or acid-base indicator titration is used to measure KH value, then the KH value can be obtained, but the measured water cannot be poured back into the tank for reuse
Solution Approach 1:
The patent extracts the measurement function from the water sample itself by using a separate sensor-based detection method. Instead of adding reagents to the water to be measured, the system uses pH electrodes and control circuits to measure KH values indirectly through pH changes caused by controlled CO2 injection, thereby separating the measurement process from the water sample and avoiding chemical contamination.
Solution Approach 2:
The patent replaces the chemical titration system with an electrochemical sensing system. Instead of using acid-base indicators and titration reactions, the invention employs pH electrodes, voltage detection circuits, and microprocessor-controlled CO2 injection to achieve KH measurement, substituting mechanical/electrical components for chemical reagents.
3Loss of substance
If air injection method is used to measure KH value, then the solutions can be poured into the tank for reuse, but manual testing and comparison is required which is inconvenient and easy to cause failing of the water cultivation process
Solution Approach 1:
The patent implements self-service automation where the system automatically performs the complete KH measurement and adjustment process without manual intervention. The microprocessor controls CO2 injection based on pH electrode readings, automatically calculates KH values, determines whether adjustment is needed, and regulates CO2 dosing accordingly, making the system self-regulating and eliminating manual testing and comparison steps.
Solution Approach 2:
The patent establishes a closed-loop feedback system where pH electrode measurements continuously monitor water conditions, the microprocessor compares actual pH/KH values against target values, and automatically adjusts CO2 injection to maintain desired parameters. This feedback mechanism ensures accurate KH control without manual intervention and prevents water cultivation process failures.
4Loss of substance
If manual testing and comparison is performed for KH measurement, then water can be reused, but the process is very inconvenient and easy to cause failing of the water cultivation process
Solution Approach 1:
The patent implements self-service automation where the system automatically performs the complete KH measurement and adjustment process without manual intervention. The microprocessor controls CO2 injection based on pH electrode readings, automatically calculates KH values, determines whether adjustment is needed, and regulates CO2 dosing accordingly, making the system self-regulating and eliminating manual testing and comparison steps.
Solution Approach 2:
The patent establishes a closed-loop feedback system where pH electrode measurements continuously monitor water conditions, the microprocessor compares actual pH/KH values against target values, and automatically adjusts CO2 injection to maintain desired parameters. This feedback mechanism ensures accurate KH control without manual intervention and prevents water cultivation process failures.
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
Cost-effective and efficient measurement and adjustment of alkalinity without chemical pollution, reducing water waste and manual intervention.
Implementation Method 1
pumping air into the reference liquid and the external liquid and detecting the pH values of the reference liquid and the external liquid
Implementation Method 2
a pH value detecting probe positioned in the test sink and serving to test a liquid inputted into the test sink for detecting a pH value of the liquid in the test sink
Data Source
AI summary
A water alkalinity detection system includes an installing box having a reference sink, a test sink and a temporary sink. A pH value detecting probe is positioned in the test sink and serves to test a liquid inputted into the test sink for detecting a pH value of the liquid. A reference pumping device serves to pump a reference liquid of the reference sink into the test sink. A temporary pumping device serves to pump an external liquid of an external sink into the temporary sink. A transferring pumping device serves to pump the external liquid from the temporary sink into the test sink. An air pumping device is connected to the test sink and the temporary sink. A control device includes a processor serving to calculate an external KH value of the external liquid.