Liquid Detection Device With Static Elimination Circuit
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Solution Overview
Problem
Current liquid detection devices suffer from false alarms, low reliability, and inability to cling to surfaces due to size and weight constraints, as well as issues with fog, water droplets, over-drying, and static electricity, leading to poor detection accuracy and sensitivity.
Innovation Solution
A liquid detection device with a housing, first and second electrodes, and a measuring circuit that adjusts sensitivity based on distance and includes a static electricity elimination circuit to differentiate between liquid presence and false signals, ensuring accurate impedance measurements and reducing false alarms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the leak sensor probe is made small and light, then it is easy to install and move, but it cannot cling to the ground and detection reliability decreases
Solution Approach 1:
The patent applies a magnetic attraction principle where a magnetic component is embedded in the probe and a magnetic component is embedded in the supporting structure. The magnetic force counteracts the lightweight nature of the probe, enabling it to cling firmly to the ground surface without requiring additional weight, thus resolving the contradiction between ease of installation and detection reliability.
2Device complexity
If electrodes are connected by wire, then the structure is simple, but coating material aging causes short circuits and false alarms
Solution Approach 1:
The patent extracts the wire connection from the electrode structure and replaces it with direct contact electrodes mounted on the housing surface. This eliminates the coating material that ages and causes short circuits, maintaining structural simplicity while significantly reducing false alarms caused by wire degradation.
Solution Approach 2:
The patent applies periodic elimination of static electricity through a predetermined setting mechanism that proactively prevents static accumulation before it can cause false alarms. This preliminary action protects the circuit from static-induced short circuits and maintains reliable operation over time.
3Weight of moving object
If the probe is lightweight, then it is easy to handle, but it cannot maintain stable contact with the surface
Solution Approach 1:
The magnetic component in the probe works with the magnetic component in the supporting structure to provide clinging force that compensates for the probe's lightweight design. This enables stable contact with the surface while maintaining minimal weight, resolving the contradiction between portability and stability.
4Measurement precision
If sensitivity is increased to detect early liquid accumulation, then detection accuracy improves, but false alarms from static electricity and fog increase
Solution Approach 1:
The periodic elimination of static electricity is performed in advance according to a predetermined setting, preventing static accumulation that would otherwise cause false alarms. This allows the device to maintain high sensitivity for early liquid detection without being plagued by false positives from static electricity or fog.
Solution Approach 2:
The measuring circuit continuously monitors impedance values and compares them against predetermined thresholds. This feedback mechanism distinguishes between actual liquid accumulation (which produces consistent impedance changes) and false signals from static electricity or fog, enabling accurate detection while reducing false alarms.
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 device provides reliable and accurate detection of abnormal liquids, reduces false alarms, and maintains stability on surfaces, effectively distinguishing between liquid accumulation and other environmental factors like static electricity, enhancing sensitivity and response time.
Implementation Method 1
the measuring circuit measures impedance value of the current loop between the first electrode and the second electrode, to distinguish whether there is abnormal liquid on the surface to be detected or not
Implementation Method 2
Static electricity generated when charges accumulated on or over an object. Charge transfer occurs when an object with static electricity contacts a zero-potential object (grounded object), or contacts an object with a potential difference from it
Data Source
AI summary
A liquid detection device and a liquid detection system are provided for detecting whether there is abnormal liquid on the surface to be detected. The liquid detection system can be used in specific working areas. A first electrode and a second electrode are used. The first electrode and the second electrode are mounted on the housing. A measuring circuit is installed inside the housing. The measuring circuit measures the impedance value between the first electrode and the second electrode, to distinguish whether there is abnormal liquid or not. The liquid detection system includes a plurality of liquid detection devices and a controller. The controller is responsible for collecting the measurement results of the plurality of liquid detection devices and performing corresponding operations.