Abstract
In the application and design of the flow cytometry, the problem of controlling the flow rate of liquid sample should be considered, which is directly related to the test performance of the instrument. In this paper, a flow cytometer liquid path controlling system based on incremental PID algorithm is designed. The STM32F429 is used as the core control chip, and a negative feedback correction network is introduced. At the same time, the incremental PID algorithm is used to control the speed of electronic motor. Combining with the hardware circuit, the automatic regulation and control of the flow rate of liquid path sample are realized. The experimental results show that the real-time sample flow can approach to the set value quickly and stably after the sampling started in this system. When different target values are set, the error between the measured value and the set value is less than 3%. The system is simple in design, high accuracy and stability, and can meet the requirements of intelligent control and high efficiency and precision in modern industrial instruments.
Published Version
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