High-precision peristaltic pump control method

Abstract

The invention discloses a high-precision peristaltic pump control method, and relates to the field of automation control. Through compensation of an acquired magnitude of angular velocity, fluctuation interference caused by chance factors can be overcome effectively, and an accurate angular velocity acquiring unit value is provided for follow-up data processing. The acquired magnitude of angular velocity is compensated through computing of a compensating parameter of the magnitude of angular velocity. Because the magnitude of angular velocity acquired by the traditional peristaltic pump control system has large deviation and dynamic responsiveness is poor, the trend of change of the angular velocity cannot be considered fully, and the magnitude of angular velocity has to be compensated. By the parameter and mode for compensating the magnitude of angular velocity in the technical scheme, the acquired magnitude of angular velocity can be compensated dynamically according to the acquired magnitude of angular velocity and the trend of change of the angular velocity, so that the adjusting amount of the angular velocity can be accurately judged in advance, and accuracy and stability of peristaltic pump control are improved.

Description

technical field [0001] The invention relates to the field of automation control, in particular to a high-precision peristaltic pump control method. Background technique [0002] Peristaltic pumps are widely used in blood purification equipment due to their advantages of no pollution, high precision and good sealing. The conventional peristaltic pump control system can only adjust the cumulative speed of the peristaltic pump running for one week, but cannot realize the adjustment of the angular speed of the peristaltic pump. [0003] The traditional peristaltic pump is limited by the structure. When the pump runs to different angles, the resistance of the pump is inconsistent, resulting in the unstable speed of the pump. Therefore, the pump will generate a pulse flow during operation, which will cause the pressure in the pipeline to change greatly. The pulse flow generated by the peristaltic pump will have a backflow phenomenon at the same time, which will affect the stabili...

AI Technical Summary

Problems solved by technology

The conventional peristaltic pump control system can only adjust the accumulative speed of the peristaltic pump for one cycle, and cannot adjust the angular velocity of the peristaltic pump.

[0003] The traditional peristaltic pump is limited by the structure. When the pump is running at different angles, the resistance it receives is inconsistent, resulting in an unstable speed. Therefore, the pump will generate a pulse flow during operation, which will cause a large change in the pressure in the pipeline. The pulsating flow generated by the peristaltic pump also appears backflow phenomenon, which affects the stability of the pressure and flow in the pump tube, easily exceeds the alarm line of the blood purification equipment, and affects the comfort of the patient's treatment.

The existing peristaltic pump control system performs control based on the collected peristaltic pump speed superimposed with the preset control signal amount, but basically does not process the collected data, resulting in high delay, slow response, and adaptability in the control of the peristaltic pump. In recent years, in the actual measurement and control, how to ensure the real-time precise control of the peristaltic pump is an urgent problem to be solved.

Images