Self-adaptive control algorithm and system for preventing overpressure of high-pressure injector

CN122376924APending Publication Date: 2026-07-14深圳市迈威医疗科技有限公司

Patent Information

Authority / Receiving Office: CN · China
Patent Type: Applications(China)
Current Assignee / Owner: 深圳市迈威医疗科技有限公司
Filing Date: 2026-05-25
Publication Date: 2026-07-14

AI Technical Summary

Technical Problem

Existing high-pressure injector control algorithms suffer from problems such as pressure response lag, uneven speed regulation, high stall error rate, and poor adaptability to different syringe sizes and patient vascular resistance, which affect injection stability and safety.

Method used

A dual-closed-loop PID control algorithm is adopted, combining an outer pressure loop and an inner speed loop. The speed limit is adjusted in real time through pressure feedback to achieve smooth speed regulation. In addition, multi-parameter fusion is used to determine stall and execute graded protection control. The PID parameters are adaptively adjusted to adapt to different syringe sizes and vascular resistance.

Benefits of technology

This technology achieves pressure stability and safety for high-pressure injectors in different scenarios, reduces the risk of pressure exceeding limits, improves the stability and accuracy of the injection process, and reduces the need for hardware modifications.

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Abstract

The application discloses a kind of self-adaptive control algorithm and system of high-pressure injector anti-overpressure, comprising the following steps: S1: obtaining pressure feedback value, speed feedback value and current feedback value;S2: determine current control parameter;S3: obtain speed limit value;S4: obtain motor drive control amount;S5: when high-pressure injector starts, stops or speed switches, the target speed corresponding to the motor drive control amount is subjected to S-shaped acceleration and deceleration smoothing processing, to control motor speed smooth change;S6: when it is judged that at least one of pressure over-limit, locked-rotor or motor over-current exists, execute hierarchical protection control.The application can solve the problems of existing high-pressure injector control algorithm, such as pressure response lag, speed regulation is not smooth, high misjudgment rate of locked-rotor and poor adaptability under different needle cylinder specifications and different patient vascular resistance.

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