Leak Detector Assembly with Flap and Capacitive Sensing
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Solution Overview
Problem
Existing backflow prevention devices in water systems often experience uncontrolled water releases due to pressure fluctuations, which can lead to significant water loss and potential contamination, and current systems lack effective detection and management of these leaks.
Innovation Solution
A leak detector assembly that includes a housing with a flap assembly and a printed circuit board to generate error signals for low and high fluid flow, coupled with a main controller for signal processing and communication, allowing for wireless or wired notification of leaks and enabling proactive maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If backflow prevention devices are installed to prevent contamination, then water system safety is improved, but uncontrolled water releases occur due to pressure fluctuations causing water loss
Solution Approach 1:
The patent implements a leak detection system with sensors that continuously monitor water flow and pressure conditions. When abnormal conditions are detected (such as uncontrolled water release), the system generates alerts and notifications to notify operators, enabling timely intervention to prevent further water loss while maintaining the backflow prevention function.
Solution Approach 2:
The patent replaces purely mechanical backflow prevention devices with an integrated system that incorporates electronic sensors, microcontrollers, and communication modules. This substitution enables intelligent monitoring and detection of leak conditions, transforming the system from passive mechanical protection to active intelligent detection and alerting.
2Loss of energy
If drain systems are designed to accommodate water releases, then water loss is managed, but drain systems may be insufficient, blocked or non-existent
Solution Approach 1:
The patent implements leak detection and alerting functionality that activates before the drain system becomes overwhelmed or blocked. By continuously monitoring flow conditions and generating early warnings, the system enables preventive maintenance actions to clear potential blockages or prepare alternative drainage paths before they become critical failures.
Solution Approach 2:
The detection system provides continuous feedback on water flow conditions to operators, enabling them to respond to emerging drain system issues before they cause complete failure. The system monitors parameters such as flow rate and pressure to detect conditions that precede drain blockage or insufficiency.
3Reliability
If inlet funnels with air gaps are used to prevent cross-connection, then contamination prevention is improved, but detection of small and large releases is insufficient
Solution Approach 1:
The patent integrates multiple functions into the inlet funnel assembly: the traditional air gap contamination prevention function is combined with leak detection sensing capabilities. The same structure serves both as a physical barrier against backflow contamination and as a platform for mounting sensors that detect water releases, eliminating the need for separate detection equipment.
Solution Approach 2:
The patent introduces sensing elements (such as flow sensors, pressure sensors, or conductive traces) as intermediary components within the inlet funnel structure. These sensors act as mediators that detect the presence and characteristics of water releases without compromising the air gap contamination prevention mechanism, translating physical water conditions into detectable electrical signals.
4Reliability
If backflow prevention devices release significant water during main pressure drop, then contamination is prevented, but the amount of water released can be significant at large flow rates
Solution Approach 1:
The patent implements real-time monitoring of water release conditions with automatic alerting. When the detection system identifies significant water releases during backflow events, it immediately notifies operators through various communication channels. This enables rapid response to minimize the total volume of water released, while the backflow prevention device continues to perform its contamination prevention function.
Solution Approach 2:
The detection system automatically monitors and reports leak conditions without requiring continuous manual inspection. The system self-detects release conditions, generates alerts, and provides information about the magnitude and duration of water releases, enabling facility operators to respond efficiently and minimize water loss while maintaining protection against contamination.
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 leak detector assembly effectively identifies and communicates small and large water releases from backflow prevention devices, enabling timely intervention to prevent water loss and contamination, and facilitating maintenance to ensure system reliability.
Implementation Method 1
The sensing element is co-planar inter-digitated conductive traces connected to a printed circuit board
Data Source
AI summary
A leak detector assembly for use with a backflow prevention device includes a housing defining a passageway for receiving a fluid. A flap assembly couples to the housing for generating a low flow error signal indicating minimal fluid passing through the passageway and a fully actuated error signal indicating significant fluid passing through the passageway. The flap assembly includes a flap mounted in the passageway such that significant flow of the fluid moves the flap to generate the fully actuated error signal. The flap assembly also includes a sensing element on the flap to determine a presence of the fluid without movement of the flap to generate the low flow error signal based on a low flow of the fluid.