Self-tuning PID Ion Adjustment Method for Hemodialysis Machine

Abstract

The invention relates to a self-tuning PID ion adjustment method for a hemodialysis machine, which comprises the following steps of: S100, creating a feedback data table and an initial control data table; S200, setting initial ion concentration, inquiring liquid B and conductance target before hemodialysis in feedback data table according to current dialysis flow rate and ion concentration, and inquiring pump speed in initial control data table at the same time, and sending to lower computer; S300, the lower computer comparing the current conductance value with the conductance value of the feedback data table, and performing PID adjustment if the current conductance value exceeds the preset value, wherein the PID adjustment comprises adjusting the pump speed within the set range, and saving the ion concentration after the adjustment is successful; S400, storing the pump speed after successful adjustment to the update control data table according to the corresponding ion concentration relationship, wherein the update control data table includes the ion concentration and the corresponding pump speed. The invention has the beneficial effects that the PID initial value self-correctionmethod can solve the problems of slow ion adjustment speed and easy deviation or fluctuation in adjustment in practical application.

Description

technical field [0001] The invention relates to the field of computer medicine, in particular to a PID ion adjustment method for self-calibration of a hemodialysis machine. Background technique [0002] In the early ion adjustment process, the following two methods are mostly used: [0003] Method 1: Proportional method for ion adjustment. This method has the problem that if the pump deviates, it will take a long time to adjust to the qualified ion concentration and the fluctuation will be large; [0004] Method 2: The gradual method is used for ion adjustment. This method is gradually approaching, and the adjustment cycle has uncertainty, sometimes short, which depends on the difference between the current value and the target value. [0005] And the above methods are only applicable to Na adjustment alone, or HCO3 adjustment alone. If the user changes Na and HCO3 at the same time, it cannot be adjusted quickly. You can only adjust the B pump first, and then adjust the A p...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art, and propose a PID ion adjustment method for self-calibration of hemodialysis machines, which solves the problems of slow ion adjustment speed and easy deviation or fluctuation in adjustment in practical applications

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