Liquid Level Measurement Circuit for Viscous Media
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Solution Overview
Problem
Existing liquid level measurement technologies, such as those using buoys and photoelectric switches, suffer from inaccuracies when measuring viscous liquids due to buoy sticking issues, leading to incorrect liquid level detection.
Innovation Solution
A liquid level measurement circuit comprising a probe with spaced-apart positive and negative electrode conductors and a potential conversion module that outputs different electrical signals based on immersion status, allowing for accurate liquid level determination without sticking, and includes a vacuum pump system for automatic liquid supplementation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a buoy and photoelectric switch are used for liquid level measurement, then the measurement structure is simple, but the measurement precision deteriorates when the liquid is viscous due to buoy sticking
Solution Approach 1:
The patent replaces the mechanical buoy system with an electrical probe system. Instead of using a mechanical buoy that physically moves with the liquid level and can stick to viscous liquids, the invention uses a probe with electrodes that detect liquid level through electrical conductivity changes. This substitution eliminates mechanical contact with viscous liquids, thereby maintaining measurement precision without increasing structural complexity.
Solution Approach 2:
The patent introduces the measurement liquid itself as an intermediary medium for detection. The conductive measurement liquid serves as the mediator between the probe electrodes and the detection system. By using the liquid's inherent electrical conductivity properties as the detection mechanism, the system avoids direct mechanical interaction that causes sticking, thus resolving the contradiction between simple structure and accurate measurement.
2Device complexity
If a buoy is used in viscous liquid, then the measurement structure is simple, but the reliability deteriorates due to sticking between buoy and liquid
Solution Approach 1:
The patent replaces the mechanical buoy system with an electrical probe system. Instead of using a mechanical buoy that physically moves with the liquid level and can stick to viscous liquids, the invention uses a probe with electrodes that detect liquid level through electrical conductivity changes. This substitution eliminates mechanical contact with viscous liquids, thereby maintaining measurement precision without increasing structural complexity.
3Device complexity
If manual liquid level monitoring is used, then the device complexity is low, but the productivity deteriorates due to incorrect liquid level detection
Solution Approach 1:
The patent implements an automatic monitoring and alert system that self-monitors liquid levels and automatically generates alerts when the liquid level is low. The system includes a probe that continuously monitors, a control unit that processes the signals, and an alert mechanism that notifies operators. This automated self-service monitoring eliminates manual checking, ensures accurate detection, and improves operational efficiency without requiring complex manual intervention procedures.
Solution Approach 2:
The patent implements a feedback mechanism where the probe continuously monitors liquid level and provides real-time feedback to the control unit. When the liquid level drops below a threshold, the system generates an alert signal. This closed-loop feedback system ensures timely detection and response, improving productivity by preventing operational errors due to incorrect liquid level detection.
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 solution provides accurate liquid level measurement for viscous liquids by preventing sticking and enabling automatic liquid replenishment, thus ensuring reliable operation and preventing printing errors in 3D printing applications.
Implementation Method 1
the positive electrode conductor is electrically connected to the negative electrode conductor by means of the measurement liquid, such that an electrical signal at the second end of the potential conversion module has a larger value than the reference electrical signal
Data Source
AI summary
A liquid level measurement circuit includes: a probe, a reference electrical signal module and a potential conversion module, where the probe extends into a liquid level accommodation body, and the liquid level accommodation body accommodates a measurement liquid module. If the liquid level of said liquid is lower than a preset liquid level, a positive electrode conductor and/or a negative electrode conductor are/is not immersed in the measurement liquid, and an output end of the potential conversion module outputs a first electrical signal; and if the liquid level of the measurement liquid is not lower than the preset liquid level, the positive electrode conductor and the negative electrode conductor are immersed in the measurement liquid, and the output end of the potential conversion module outputs a second electrical signal. The accuracy of liquid level measurement can be improved.


