Domestic Water Installation Monitoring with Adaptive Leak Detection
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Solution Overview
Problem
Existing domestic water installation leakage monitoring systems face challenges in reliably distinguishing between unintended leaks and regular water withdrawals, leading to potential false alarms and water damage, due to the complexity and cost of equipping multiple tapping points with flow meters and sensors.
Innovation Solution
A method that automatically adjusts the monitoring limits by switching from a stringent first limit value (GW1) to a more lenient second limit value (GW2) when a sensor detects water withdrawal, with GW2 being variable and dependent on the location and type of use, thereby reducing the risk of accidental shut-off during intended water use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If flow meters and sensors are installed at multiple draw-off points to detect leaks, then leak detection reliability is improved, but system cost and complexity increase significantly
Solution Approach 1:
The patent combines multiple detection functions (flow measurement, leak detection, and draw-off point monitoring) into a single centralized control unit. The control unit receives signals from a limited number of sensors and flow meters strategically positioned in the system, processes all information centrally, and makes shutdown decisions based on comprehensive analysis, thereby reducing the total number of components needed while maintaining high detection reliability.
Solution Approach 2:
The control unit serves multiple functions: it monitors flow rates, detects leaks, tracks draw-off point status, and controls shutdown operations. By making the control unit multi-functional, the system avoids the need for separate dedicated devices for each function, reducing overall system complexity and cost while maintaining comprehensive monitoring capability.
2Device complexity
If a single alarm value is used for leak detection, then system simplicity is improved, but false alarms increase during regular water withdrawal
Solution Approach 1:
The control unit dynamically adjusts the alarm threshold based on real-time operational context. When draw-off points are active, the system raises the alarm threshold to accommodate legitimate water usage patterns. When no draw-off points are active, the threshold is lowered to detect even minor leaks. This dynamic adaptation eliminates false alarms during normal operation while maintaining high sensitivity for actual leak detection.
Solution Approach 2:
The system continuously monitors the status of draw-off points and uses this feedback information to adjust monitoring parameters. The control unit receives feedback from sensors about whether water is being withdrawn at various points and automatically modifies the alarm criteria accordingly, creating a closed-loop system that adapts to current operational conditions and prevents false alarms.
3Measurement precision
If flow meters are installed at every draw-off point to monitor water withdrawal, then leak detection accuracy is improved, but cost and space requirements increase
Solution Approach 1:
The system segments monitoring responsibilities between centralized flow measurement and distributed status sensing. Instead of installing flow meters at every draw-off point, the patent places flow meters at strategic locations (such as the main supply line) and uses simpler sensors at draw-off points to detect whether water is being withdrawn. The centralized control unit combines these segmented measurements to achieve comprehensive monitoring with fewer components.
Data Source
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AI summary
A method for monitoring a domestic water installation (1) with a central water supply line (2) with a flow meter (5) and a shut-off device (6), with several taps (8a, 8b, 8c, 8d) that can be individually operated by means of valve devices (9a, 9b, 9c, 9d), wherein a sensor (10a, 10b) for detecting the state of the tap is arranged at at least one tap, and with an electronic control device (7) to which measurement signals from the flow meter and the sensors are supplied, wherein the electronic control device causes the shut-off device to close when the flow rate or duration of continuous water withdrawal exceeds a first limit value GW1, is characterized in that the first limit value GW1 is replaced by a variably predefined second limit value GW2 that is stored in the electronic control device or can be queried from the electronic control device.If a sensor detects the status of a tap and signals water withdrawal, the following applies: GW2 > GW1, and the second limit value is chosen depending on the location of the sensor signaling water withdrawal. This allows for a highly reliable differentiation between unwanted leakage and regular water withdrawal within the operating area served by the domestic water installation.