Hand-held Tensiometer Automatic Bubble Life Control
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Solution Overview
Problem
Hand-held tensiometers face limitations in quickly regulating bubble life, have complex operation interfaces, lack direct communication with external peripherals, and require unnecessary calibration steps, leading to measurement errors and inefficiencies.
Innovation Solution
A hand-held tensiometer with improved design features including direct access keys for measurement modes, automatic bubble life control, wireless interfaces for external communication, and simplified data memory access, allowing for quicker measurements and calibration on demand.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If manual adjustment of air pump current is used to generate bubbles with different lifespans, then the device can produce variable bubble lives, but the bubble life is not controlled and varies over time due to drift, requiring user responsibility to achieve target values
Solution Approach 1:
The patent implements automatic feedback control by measuring the actual bubble life and comparing it to the target value, then adjusting the gas volume flow accordingly. The controller continuously monitors bubble life through pressure signal analysis and automatically regulates the gas flow to maintain the desired bubble life, eliminating manual adjustment drift and ensuring reliable control.
Solution Approach 2:
The system performs self-regulation by automatically adjusting its own gas volume flow based on real-time bubble life measurements. The controller autonomously compensates for drift and maintains optimal bubble life without requiring user intervention, making the device self-correcting and reliable.
2Extent of automation
If automatically operating devices are used to control bubble lifespan according to set values, then bubble life control is automated, but the gas volume flow is not measured and used to regulate bubble life, limiting regulation speed
Solution Approach 1:
The patent introduces direct feedback control where the actual gas volume flow is measured and fed back to the controller. This enables the system to quickly detect deviations from the target bubble life and immediately adjust the gas flow rate, significantly improving regulation speed compared to systems that only react after complete bubble detection.
Solution Approach 2:
The patent replaces indirect mechanical bubble detection methods with direct electronic measurement of gas volume flow. By using electronic sensors and digital processing to measure and control gas flow, the system achieves faster response times and more precise regulation compared to traditional mechanical or purely temporal methods.
3Measurement precision
If calibration is performed to determine measurement behavior, then accurate measurements can be achieved, but two measurements are required (calibration and actual adjustment), consuming additional time
Solution Approach 1:
The patent performs calibration actions automatically and preliminarily by determining measurement behavior during the first measurement sequence. The controller stores this calibration data and uses it for subsequent measurements, eliminating the need for separate manual calibration steps and reducing total measurement time while maintaining precision.
Solution Approach 2:
The system performs self-calibration by automatically determining its own measurement behavior and storing the calibration data for future use. This self-service approach eliminates the need for external calibration procedures and reduces the time required for accurate measurements.
4Adaptability or versatility
If menu levels are used to call up measurement functions due to lack of sufficient external surface, then the device can accommodate multiple functions, but operation becomes confusing for the inexperienced
Solution Approach 1:
The patent segments the user interface into direct access keys for frequently used functions and menu-accessible functions for less common operations. This segmentation allows experienced users to quickly access common measurement modes through dedicated keys while still providing comprehensive functionality through menus when needed, reducing complexity for routine operations.
Solution Approach 2:
The patent applies different interface qualities to different functions: direct access keys provide simple, immediate access for common operations, while menu structures provide detailed control for specialized functions. This local differentiation optimizes ease of operation for frequent tasks while maintaining versatility for less common needs.
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
Enables faster and more accurate surface tension measurements with improved usability, direct communication with peripherals, and reduced calibration time, enhancing operational efficiency and data accessibility.
Implementation Method 1
hand-held tensiometer for measuring the surface tension of liquids or the substance concentration in a liquid using a bubble pressure method
Implementation Method 2
measuring capillary attached thereto... means for measuring a volume flow... from which a bubble lifetime can be controlled
Data Source
Figure 1
Figure 2~3C
AI summary
Disclosed is a hand-held tensiometer for measuring the surface tension of liquids or the concentration of a substance in a liquid according to a bubble pressure method featuring an automatically controlled bubble life. Said tensiometer comprises a housing which is provided with at least one measuring capillary that is fastened thereto and additional optional sensors, operator's means and display means, a power supply, a gas source for producing bubbles on at least one measuring capillary, means for adjusting the bubble lives, means for measuring and regulating the gas volume flow introduced into the measuring capillary, an electronic/processor unit for controlling all internal processes, and means for storing data. The bubble life or a succession thereof is automatically regulated according to one or several predefined or permanent setpoint values by measuring and adjusting or measuring and regulating a gas volume flow.