Digital Burette Control for Precise Low-Volume Dispensing
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Solution Overview
Problem
Conventional burettes require manual operation, leading to inaccuracies in dispensing small volumes and lack data storage capabilities, necessitating repeated procedures due to operator error.
Innovation Solution
A digital burette with an input unit, control unit, and actuating means, enabling precise liquid dispensation through a peristaltic pump and stepper motor, along with data storage and real-time data logging capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual operation with sensor detection is used, then the burette can detect liquid volume, but the accuracy and precision of dispensing small volumes deteriorates due to operator error
Solution Approach 1:
The burette performs self-measurement through integrated sensors that automatically detect liquid volume without requiring manual reading or calculation by the operator. The system self-regulates by using the sensor data to control the piston movements, eliminating human error in both measurement and dispensing operations.
Solution Approach 2:
The sensor continuously monitors the liquid volume and provides real-time feedback to the control system. This feedback loop allows the burette to automatically adjust piston movements to achieve the desired dispensing precision, resolving the contradiction between detection accuracy and dispensing precision.
2Device complexity
If manual rotation of piston is required, then the burette structure remains simple, but operator dependency increases and both hands are occupied during titration
Solution Approach 1:
The manual mechanical rotation of the piston is replaced with an automated motorized drive system controlled by a microprocessor. This substitution eliminates the need for manual hand operations while maintaining the basic burette structure, allowing operators to use both hands for titration work.
Solution Approach 2:
The burette autonomously performs piston rotation and liquid dispensing based on pre-programmed sequences or real-time sensor feedback, making the system self-operating and significantly reducing operator dependency without complicating the overall device architecture.
3Reliability
If continuous operator monitoring is required, then the burette can adjust dispensing in real-time, but the procedure becomes time-consuming and prone to human error
Solution Approach 1:
The integrated sensor provides continuous real-time feedback on liquid volume and flow rate, enabling the microprocessor to automatically adjust dispensing parameters without operator intervention. This automated feedback loop maintains high reliability while reducing procedure time by eliminating manual monitoring and adjustment steps.
Solution Approach 2:
The burette autonomously monitors its own operation through integrated sensors and automatically corrects any deviations from the desired dispensing profile, eliminating the need for continuous operator monitoring and significantly reducing procedure time while maintaining or improving reliability.
4Loss of information
If data storage capability is added, then previous iterations can be stored for analysis, but the device complexity increases
Solution Approach 1:
The microprocessor-based control system serves multiple functions: it controls piston movement, processes sensor data, performs calculations, and stores experimental results. By making the control system universal and multi-functional, data storage capability is added without proportionally increasing device complexity.
Solution Approach 2:
The data storage function is merged with the existing microprocessor control system rather than being implemented as a separate component. This integration allows previous iterations to be stored and analyzed while minimizing the increase in overall device complexity.
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
Ensures accurate and controlled liquid dispensation down to 0.01 mL, reduces operator dependency, and allows for data tracking and analysis, enhancing experimental efficiency.
Implementation Method 1
A digital burette with an input unit, control unit, and actuating means, enabling precise liquid dispensation through a peristaltic pump and stepper motor
Data Source
AI summary
A digital burette comprising a housing configured to be mounted on a liquid reservoir, a tube extending from the housing, an input unit provided on the housing, and an actuating device/unit/component/machine/structure configured to communicate with the control unit. The tube fluidly communicates with the liquid reservoir. The input unit receives an input corresponding with a desired volume of the liquid to be dispensed, and generates an input signal. The control unit receives the input signal and generates a processed signal. The actuating device/unit/component/machine/structure is communicatively coupled to the input unit or the control unit to facilitate dispensation of the desired volume of the liquid through the tube based on the received input signal/processed signal.