Inline Pool Water Monitoring With Fixed-Volume Reagent Mixing
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Solution Overview
Problem
Conventional methods for monitoring water quality in swimming pools and spas are inaccurate, inconvenient, labor-intensive, and require frequent maintenance, with probes drifting over time and floating devices being easily compromised.
Innovation Solution
A system using a double plunger and multiport rotary valve to mix water and reagents in a fixed volume, minimizing cross-contamination and providing accurate, automatic water parameter measurements through a photometer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional chemistry kits are used for water quality monitoring, then users can test water parameters, but the testing process becomes complicated and user-friendly is compromised
Solution Approach 1:
The system performs water quality testing automatically without requiring user intervention. The robotic arm collects water samples, the spectrometer analyzes them, and the system generates reports autonomously, eliminating the need for users to manually handle complex chemistry kits while maintaining ease of operation
Solution Approach 2:
The patent replaces manual mechanical chemistry kit operations with an automated robotic system. The robotic arm performs sample collection and handling, while the spectrometer provides automated optical analysis, substituting complex manual procedures with automated mechanical and optical systems that are easier to operate
2Measurement precision
If remote testing with sample transport to laboratories is used, then water samples can be analyzed, but sample contamination and chemistry changes occur during transit
Solution Approach 1:
The system performs preliminary analysis at the pool location using an on-site spectrometer and robotic arm. Water samples are analyzed immediately in their original environment without being transported to external laboratories, preventing contamination and chemistry changes that would occur during transit while maintaining measurement precision
Solution Approach 2:
The patent introduces an on-site spectrometer and robotic arm as intermediaries between the water source and analysis. This intermediary system performs measurements locally, eliminating the need to transport samples to external laboratories and thereby preventing contamination and chemical changes during transit
3Measurement precision
If maintenance service calls are used for water quality monitoring, then expert analysis can be obtained, but availability and time consumption increase
Solution Approach 1:
The system provides self-service water quality monitoring with automated robotic sample collection and spectrometer analysis. The system performs expert-level analysis autonomously without requiring external maintenance personnel, eliminating time loss associated with service call scheduling and availability while maintaining measurement precision through automated optical analysis
Solution Approach 2:
The patent replaces the mechanical system of manual service calls with an automated robotic arm and spectrometer system. This substitution enables continuous, on-demand water quality analysis without human intervention, eliminating the time delays inherent in scheduling and responding to maintenance service calls while maintaining expert-level measurement accuracy
4Productivity
If probes are used for water quality monitoring, then continuous measurement is possible, but probe drift and maintenance requirements increase
Solution Approach 1:
The system extracts the measurement function from physical probes that drift and require maintenance. Instead of using in-situ probes in the water, the robotic arm collects discrete water samples and analyzes them with a spectrometer, removing the problematic probe component entirely while maintaining continuous monitoring capability through automated periodic sampling
Solution Approach 2:
The patent replaces the mechanical probe-based measurement system with an optical spectrometer system. The robotic arm collects samples and the spectrometer analyzes them optically, substituting the unreliable electrical probes with more reliable optical measurement that does not suffer from drift or require frequent calibration, thereby improving measurement consistency while maintaining continuous monitoring
5Ease of operation
If floating devices are used for water quality monitoring, then accessibility is improved, but device security and measurement accuracy deteriorate
Solution Approach 1:
The patent replaces the mechanical floating device system with an automated robotic arm system mounted on a fixed structure. The robotic arm can access water samples from various depths and locations without floating, providing both accessibility and security. The fixed mounting prevents theft and unauthorized removal while the robotic mechanism maintains ease of operation through automated control
Solution Approach 2:
The system performs preliminary water quality analysis automatically at accessible locations using the robotic arm and spectrometer. By establishing on-site automated analysis capability, the system eliminates the need for floating devices that must be accessible to users, while the fixed installation ensures security and measurement reliability without compromising operational accessibility
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 system offers reliable, inline water quality monitoring with reduced maintenance needs, eliminating user intervention and ensuring precise measurement of parameters like pH, free chlorine, and total alkalinity.
Implementation Method 1
measuring one or more water parameters using liquid reagents and a photometer
Data Source
AI summary
A water quality monitoring system for a swimming pool or spa is provided inline with other systems of the swimming pool or spa. The water quality monitoring system may include a double plunger, a testing chamber with a fixed volume, and a multiport rotary valve. A method of monitoring water quality of water of a swimming pool or spa may include drawing water into the testing chamber using the double plunger, rotating the multiport rotary valve to first position enabling fluid communication with a first reagent, drawing the first reagent into the testing chamber using the double plunger, mixing the first reagent and the water in the testing chamber using the double plunger, and measuring a water parameter of the mixed water and the first reagent in the testing chamber using a photometer.