Dual-Temperature Pipeline Sensor for Low-Flow Leak Detection
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Solution Overview
Problem
Existing leak detection technologies in fluid-carrying pipelines, such as water meters, are limited in detecting leaks at low flow rates and require retrofitting, and standalone devices are bulky and power-dependent, making them unsuitable for apartments and complex topologies.
Innovation Solution
A compact sensor device with two temperature sensors, one closer to and one farther from the pipeline, processes data locally or remotely using a computing unit to detect fluid flow by analyzing temperature changes, enabling leak detection even at low flow rates and complex topologies, with a battery-powered design for flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If water meters are installed on the main water line, then leaks can be detected, but only if the water flow through the leak is sufficiently high (50 liters per hour or more)
Solution Approach 1:
The patent replaces mechanical water flow measurement with thermal field measurement. Instead of using mechanical components that require significant water flow to operate, the invention uses temperature sensors to detect the thermal field changes caused by even minimal water flow, enabling leak detection at very low flow rates down to 1 milliliter per minute.
Solution Approach 2:
The invention changes the detection parameter from mechanical flow measurement to thermal parameter measurement. By monitoring temperature differences and thermal field changes in the pipeline and surrounding environment, the system can detect leaks at flow rates as low as 1 mL/min, vastly improving sensitivity compared to traditional mechanical water meters.
2Reliability
If standalone leak detection devices are used, then leak detection is possible, but the devices are bulky and require a remote power source
Solution Approach 1:
The patent merges multiple functions into a single integrated device. The sensor device combines temperature sensing, microprocessor-based evaluation, and leak detection algorithms in one compact unit, eliminating the need for separate bulky components and remote power sources. The evaluation unit processes thermal data locally to determine leak conditions.
Solution Approach 2:
The sensor device incorporates self-powered operation through energy harvesting or ultra-low-power design, eliminating the need for remote power sources. The evaluation unit autonomously processes temperature data and makes leak detection decisions without requiring external computational resources, making the device self-sufficient and compact.
3Measurement precision
If temperature sensors are placed close to the pipeline, then fluid flow detection sensitivity is improved, but the sensors may be affected by direct thermal coupling
Solution Approach 1:
The patent introduces an intermediary thermal path between the pipeline and sensors. Instead of direct contact that causes thermal interference, the system uses the surrounding environment (air, insulation material, or mounting structure) as an intermediary medium to transmit thermal changes, filtering out direct thermal coupling effects while preserving fluid flow detection sensitivity.
Solution Approach 2:
The invention applies different thermal coupling characteristics to different sensor positions. Temperature sensors are strategically positioned with specific thermal coupling properties - some sensors have direct thermal contact for high sensitivity, while others use indirect coupling for environmental reference, creating local quality differences that enable accurate leak detection while compensating for thermal interference.
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 sensor device accurately detects fluid flow and leaks at low rates, is easily installable, and operates independently, providing real-time monitoring and notifications, suitable for various pipeline thicknesses and complex building structures.
Implementation Method 1
the first temperature sensor (3) is at a greater distance from the pipeline (6) than the second temperature sensor (2)... process first sensor data from the first temperature sensor (3) and second sensor data from the second temperature sensor (2)... to determine a fluid flow through the pipeline (6)
Data Source
Figure 1~3
Figure 4a~4c
Figure 4d
AI summary
A sensor device (1) for a fluid-carrying pipeline, in particular for leak detection, comprises a housing (7) for arrangement on the pipeline (6), a first temperature sensor (3), a second temperature sensor (2) and an evaluation unit (4), wherein the temperature sensors (2, 3) are arranged in and/or on the housing (7) such that, in the state of the housing being attached to the pipeline (6), the first temperature sensor (3) is at a greater distance from the pipeline than the second temperature sensor (2), wherein the evaluation unit (4) is configured to a) process first sensor data of the first temperature sensor (3) and second sensor data of the second temperature sensor (2) as a local computing unit and/or b) transmit the first and second sensor data to a remote computing unit for processing in order to determine a fluid flow through the pipeline (6).