用于肿瘤联合治疗仪温度控制的改进PID算法

An Improved PID Algorithm for Temperature Control Used by Tumor Combined Therapeutic Instrument

介绍一种基于改进 PID算法的多功能肿瘤联合治疗仪的研制。它基于 1+1=3或 1+1+1>3肿瘤联合治疗增敏原理 ,可以单独用于肿瘤热疗 ,也可以进行热化疗、热放疗或三联治疗。采用改进 PID控温算法 ,解决了因更换不同加热器导致对象特性变化使控温性能降低的问题 ,确保不同加热器都能对腔内肿瘤病灶进行均匀、平稳的射频加热。实验证明 ,算法适应性强、抗干扰能力强、控温精度高 (± 0 .1℃ ) ,仪器工作稳定可靠 ,具有较高的临床应用价值。

The development of a multi-functional tumor combined therapeutic instrument based on improved PID algorithm is introduced. It is based on the theory of 1+1=3 or 1+1+1>3 curative effect enhancement by tumor combined therapy, and it can be used solely, or with the combination of chemotherapy or actinotheraphy or both for tumor hyperthermia. By adopting improved PID temperature control algorithm, the problem of temperature control precision reduction due to process characteristics changing with different heaters was solved, thus ensuring homogeneous and smooth radio frequency heating by different heaters to intracavity tumor foci. These experiments demonstrated that the new algorithm has strong adaptability and anti-disturbance capability, the equipment works stably and reliably, and it can control therapeutic temperature precisely (±0.1℃), which indicates a good value in clinical application.