Thermal Dispersion Flow Meter for Small Pipe Leak Detection
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Solution Overview
Problem
Existing water meters with mechanical components fail to detect small fluid leaks in plumbing systems, leading to undetected water loss and potential structural damage, mold growth, and significant financial losses.
Innovation Solution
A non-invasive thermal dispersion flow meter with a Wheatstone Bridge circuit and temperature sensors clamped onto pipes to measure fluid flow, triggering alarms and automatic shut-off mechanisms for leaks, and integrating with moisture sensors for comprehensive leak detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If mechanical water meters are used, then they can measure fluid flow, but they fail to detect small fluid leaks
Solution Approach 1:
The patent replaces mechanical water meter components with electronic sensors and signal processing systems. Thermal sensors detect temperature changes caused by fluid flow, and electronic circuits analyze these signals to detect leaks, eliminating the need for mechanical moving parts that fail to detect small flows.
Solution Approach 2:
The patent changes the measurement parameter from mechanical displacement to thermal properties. By monitoring temperature variations in the fluid or conduit caused by flow, the system achieves higher sensitivity for detecting small leaks that mechanical meters miss.
2Measurement precision
If thermal dispersion flow meters are used, then small leaks can be detected, but device complexity increases
Solution Approach 1:
The patent uses the fluid itself or the conduit wall as an intermediary medium for heat transfer. Thermal sensors measure temperature changes in the fluid or conduit, indirectly detecting flow without requiring direct contact with the fluid, simplifying the sensor design while maintaining high detection accuracy.
Solution Approach 2:
The patent replaces complex mechanical leak detection mechanisms with simpler electronic thermal sensing systems. The electronic circuits required for thermal measurement are less complex than mechanical components needed to detect small flow rates, resolving the contradiction between precision and complexity.
3Ease of operation
If non-invasive thermal monitoring is used, then plumbing systems can be monitored without disruption, but installation complexity increases
Solution Approach 1:
The patent uses the conduit wall as a thermal intermediary, allowing sensors to be mounted on the exterior of pipes without cutting into or disrupting the plumbing system. This non-invasive approach maintains ease of installation while the sensor-conduit-fluid thermal coupling enables accurate flow detection.
Solution Approach 2:
The thermal monitoring device is designed to be universally applicable to various pipe types and configurations. By measuring thermal properties through the conduit wall, the same basic sensor design can monitor different plumbing systems without custom installation, reducing overall system complexity despite the sophisticated measurement capability.
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
Accurately detects even small leaks, preventing water damage by triggering alarms and shutting off water supply, thus minimizing structural and financial losses.
Implementation Method 1
A non-invasive thermal dispersion flow meter with a Wheatstone Bridge circuit and temperature sensors clamped onto pipes
Implementation Method 2
temperature sensors clamped onto pipes to measure fluid flow
Data Source
AI summary
A non-invasive thermal dispersion flow meter with chronometric monitor for fluid leak detection includes a heater, an ambient temperature sensor and a flow rate sensor which are configured to sense the temperature of a fluid in a conduit, and then monitor the flow of that fluid through the conduit. The fluid flow sensor is incorporated into a Wheatstone bridge circuit which is used to provide increased sensitivity to the outputs of the sensors. Based upon the ambient temperature sensor readings, the flow rate sensor and heater may be adjusted to optimize the operation of the system to detect leaks. An alternative embodiment utilizes a single sensor and separate heater which work together to determine heat propagation times which in turn is used to calculate flow rate.