Microcontroller Bioreactor Control With Encoder Error Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing bioreactor controller systems require multiple PCs, are costly ($400-$1,000), have unstable software, and suffer from temporal inaccuracy (1 hour/week drift, necessitating a PC-independent, cost-effective, and stable solution for precise bioreactor operations.
Innovation Solution
A microcontroller-based bioreactor controller using linear stepper motor technology with a digital differential encoder for movement error detection, providing a simple user interface and customizable protocols, achieving temporal accuracy of less than 1 second/week and a resolution of less than 5 μm, while being durable and inexpensive.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a PC-based controller system is used, then control functionality is achieved, but cost increases to $400-$1,000 and temporal accuracy deteriorates to 1 hour/week drift
Solution Approach 1:
The patent replaces the PC-based control system with a microcontroller-based system. Specifically, it uses a microcontroller (such as Arduino or similar) to control linear stepper motors, substituting the complex PC software and hardware infrastructure with a dedicated, simplified control device that achieves superior temporal accuracy (less than 1 second/week drift) while reducing overall system complexity and cost.
Solution Approach 2:
The microcontroller-based system is designed to operate independently without requiring external PC control. The controller device integrates all necessary control functions, including motor control and position feedback processing, into a self-contained unit that can autonomously manage the bioreactor stretching operations with high temporal precision.
2Reliability
If a PC-based controller system is used, then control functionality is achieved, but software stability deteriorates and cost increases
Solution Approach 1:
The patent replaces the unstable PC software system with a microcontroller-based control system. The microcontroller runs dedicated control firmware that is inherently more stable and reliable for this specific application. This substitution eliminates the software instability issues associated with PC-based systems while simplifying the overall system architecture by removing unnecessary PC hardware and operating system dependencies.
3Measurement precision
If a microcontroller-based system is used, then cost decreases and temporal accuracy improves to less than 1 second/week, but movement detection complexity increases
Solution Approach 1:
The patent incorporates feedback mechanisms through encoders mounted on the linear stepper motors. These encoders provide real-time position feedback to the microcontroller, enabling precise monitoring of motor movement. The microcontroller compares the actual position feedback with the commanded position, detecting any movement errors and correcting them accordingly, thus maintaining high temporal accuracy while managing the complexity of movement detection through intelligent feedback processing.
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 offers a stable, cost-effective bioreactor controller with enhanced temporal accuracy and precision, enabling precise and reliable bioreactor operations at a significantly lower cost than traditional systems, with a user-friendly interface and easy customization options.
Implementation Method 1
The present invention provides a custom designed device that utilizes linear stepper motor technology to accomplish cyclic stretching for eight scaffolds at a time
Implementation Method 2
the movement error detection is performed by a digital differential encoder, and the error signal is processed within the microcontroller
Data Source
AI summary
The present invention provides a bioreactor controller with a simple user interface comprising a microcontroller and a linear motor. The bioreactor controller is microcontroller-based, has a greater temporal accuracy, and inexpensive. The microcontroller of the bioreactor controller selects a protocol mode and a setup mode by the user, runs the protocol mode if the setup mode is not selected by the user, stops running the protocol mode for a predetermined time if the protocol mode is selected by the user until the user is completed with calculations and record-keeping, detects movement error of the bioreactor controller, and informs the error to the user.