Non-contact Liquid Level Detection in Hanging Bottles
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Solution Overview
Problem
Current liquid parameter detection systems in hanging bottles are complex, costly, difficult to recycle, and prone to contamination, lacking real-time non-contact measurement capabilities, which increases the risk of blood backstreaming during infusion.
Innovation Solution
A non-contact liquid parameter detection system integrated into the hanging bottle casing and cap, utilizing a cantilever beam weight sensor for overall gravity, an ultrasonic density sensor for liquid density, and a tri-axial acceleration sensor for inclination, with wireless transmission to a server for real-time calculation and display of liquid volume, gravity, and flow rate, avoiding contamination and enabling user-friendly interaction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a detecting member contacts the liquid to detect liquid level, then the liquid level can be detected, but the liquid is contaminated
Solution Approach 1:
The patent replaces mechanical contact-based liquid level detection with ultrasonic wave-based non-contact detection. The ultrasonic sensor emits sound waves that reflect off the liquid surface, and the echo time is used to calculate liquid level without physical contact, thereby avoiding contamination while maintaining detection accuracy
Solution Approach 2:
The patent introduces air as an intermediary medium between the detection sensor and the liquid. The ultrasonic sensor detects liquid level through the air medium above the liquid, eliminating direct contact between the sensor and liquid, thus preventing contamination while enabling accurate measurement
2Ease of manufacture
If the detection system is integrated into hanging bottle casing and cap, then the system is easy to disassemble and recycle, but real-time non-contact measurement capabilities are lacking
Solution Approach 1:
The patent combines multiple detection functions (ultrasonic level detection, weight detection, inclination detection) into an integrated system mounted on the hanging bottle cap and casing. This merging enables real-time monitoring of multiple parameters simultaneously while maintaining ease of disassembly and recycling of the bottle components
Solution Approach 2:
The detection system is designed with multi-functionality, incorporating ultrasonic sensors for liquid level detection, weight sensors for mass measurement, and acceleration sensors for inclination detection. This universal system can detect multiple liquid parameters using non-contact methods, resolving the contradiction between ease of manufacture and measurement capability
3Measurement precision
If existing detection systems are used, then liquid parameters can be detected, but the systems are complex, costly, and difficult to recycle
Solution Approach 1:
The patent segments the detection system into independent, modular components: ultrasonic sensors mounted on the cap, weight sensors on the casing, and acceleration sensors for inclination detection. Each module performs a specific function and can be independently replaced or recycled, reducing overall system complexity while maintaining detection precision
Solution Approach 2:
The patent employs cost-effective, easily replaceable sensor modules that can be disposed of or recycled with the bottle. The use of standard ultrasonic, weight, and acceleration sensors keeps costs low and simplifies the system, making it economically viable and environmentally friendly
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 system provides real-time, non-contact measurement of liquid parameters, reducing the risk of blood backstreaming, is easy to disassemble and recycle, and does not contaminate the medical liquid, enhancing safety and usability.
Implementation Method 1
a hanging bottle casing unit for determining an overall gravity of the hanging bottle
Implementation Method 2
a hanging bottle cap unit for determining a liquid density in the hanging bottle
Implementation Method 3
determining a liquid level inclination in the hanging bottle
Data Source
AI summary
A liquid detection system for detecting a liquid level position of a liquid in a hanging bottle includes a hanging bottle casing unit for determining the overall gravity of the hanging bottle, a hanging bottle cap unit for determining the liquid density in the hanging bottle, and a transmission unit for transmitting the overall gravity and liquid density of the hanging bottle to a server, and the server. The server is configured to determine the liquid gravity in the hanging bottle, calculate the liquid volume in the hanging bottle based on the liquid gravity and the liquid density, and determine a liquid level position based on the liquid volume.