Digital Viscosity Measurement System for Harsh Field Environments
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Solution Overview
Problem
Standard viscosity testing devices are inaccurate and inefficient, particularly in harsh field environments, due to manual operation, human error, and inability to perform bidirectional and oscillation testing, with analog transducers that drift with time and temperature, and lack precision for highly viscous substances.
Innovation Solution
A digital viscosity measurement system with a variable speed drive, digital encoder, and electronic display, compatible with API standards, that automatically changes speed and performs continuous testing without interruption, enabling precise and repeatable measurements of viscosity in a portable and harsh environment-compatible form.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If analog transducers and visual pointer scales are used for viscosity measurement, then the device structure is simple, but the measurement precision deteriorates due to drift with time and temperature and reading inaccuracy
Solution Approach 1:
The patent replaces analog mechanical transducers and visual pointer scales with a digital encoder system that provides electronic measurement of torque and rotational position. This substitution eliminates the drift issues inherent in mechanical analog systems while providing stable, drift-free digital readings that can be processed electronically to calculate viscosity with higher precision.
Solution Approach 2:
The patent creates a digital copy of the mechanical measurement process through the encoder system. Instead of directly reading mechanical pointer positions, the system uses digital encoders to capture rotational position and torque data, then processes this digital information to generate viscosity measurements. This digital copying approach eliminates reading errors and drift while maintaining the essential measurement function.
2Productivity
If manual gear changing is required for different testing speeds, then the device structure is simple, but the productivity deteriorates due to test interruptions and time delays
Solution Approach 1:
The patent implements a variable speed drive system that can dynamically adjust rotational speeds without mechanical intervention. This dynamic speed control allows the system to automatically transition between different testing speeds (e.g., 3, 6, 12, 30, 60, 100 RPM) during continuous operation, eliminating the need for manual gear changes and maintaining uninterrupted testing flow.
Solution Approach 2:
The system performs speed changes automatically through electronic control of the variable speed drive, without requiring external manual intervention. The drive system self-adjusts rotational speeds according to the testing protocol, eliminating the need for operators to stop the test and manually change gears, thereby maintaining continuous operation and improving productivity.
3Adaptability or versatility
If unidirectional rotation is used for viscosity testing, then the device structure is simple, but the adaptability deteriorates for testing materials requiring bidirectional and oscillation testing
Solution Approach 1:
The patent employs a variable speed drive system capable of dynamic control over rotational direction and oscillation patterns. This dynamic control allows the system to switch between unidirectional rotation, bidirectional rotation, and oscillation modes as required by different testing protocols, providing versatility for testing various material types including gels that require bidirectional and oscillation testing.
Solution Approach 2:
The drive system is designed to perform multiple functions: unidirectional rotation for standard viscosity testing, bidirectional rotation for gel and yield point testing, and oscillation for setting rate determination. This multi-functional capability allows a single device to accommodate diverse testing requirements across different industries and material types.
4Loss of information
If visual pointer scales are used for reading measurements, then the device structure is simple, but the loss of information increases due to bouncing and jiggling requiring best guess readings
Solution Approach 1:
The patent replaces the mechanical pointer and visual scale system with an electronic display system that processes digital encoder data. This substitution eliminates the physical bouncing and jiggling of analog pointers during vibration, providing stable digital readings that accurately reflect the measured torque and rotational position without requiring operator interpretation or best-guess estimations.
Solution Approach 2:
The system creates a digital representation of the measurement data through the encoder and display system. Instead of relying on physical pointer position that can bounce during vibration, the digital system continuously captures and displays the actual rotational position and torque values, eliminating information loss due to mechanical instability while providing clear, unambiguous readings.
Data Source
AI summary
A highly efficient, highly accurate controllable digital viscosity testing system is provided. The system incorporates a variable speed motor, a digital encoder, a beam-deflection and/or magnetic torque resistance for unidirectional or bi-directional measurement of shear, and an API recommended practice 13B-11ISO 10414-1 bob and rotor sleeve measurement device for submerging in a test sample to measure shear forces exerted by the test sample.