磁敏式肌张力实验仪研制与医学物理的教学

Magnetic -muscle Tension Experiment Instrument Developed and the Teaching of Medical Physics

目的:为了提高医学物理教学质量,开设研究性实验课程,验证物理学规律和体现医学物理学理论在医学中的应用,研制了磁敏式肌张力实验仪。方法:根据霍尔效应,基于线性霍尔电路设计了一种新型霍尔式肌张力医用换能器。论述了设计原理,对霍尔式肌张力换能器进行了理论计算和实验研究,结合实验结果重新设计了医用换能器实验。换能器配置了稳压电源、数字仪表、线性放大器和接口电路,构成了一个完善的肌张力实验仪器。结果:肌张力实验仪采用磁敏无接触方式取样,使换能器电路系统与受力部分无直接联系,提高了可靠性,实验效果好、不易损坏。具有验证、测量、研究和应用的实验项目,实验内容丰富,有助于提高学生的研究能力和实验技能。实现了既能验证物理规律,又能结合医学应用的教学目的。结论:对结果分析显示R=0.99999,SD=0.40627,P<0.0001。霍尔式肌张力换能器的理论计算与实验结果相吻合,可以指导医用换能器实验教学。

Objective： In order to improve the quality of teaching medical physics, set up experimental research course to verify the laws of physics and to reflects the theory of the medical physics in medicine, the developed of the magnetic-muscle tension experimental instrument. Methods： According to the Hall-effect, based on the linear Hall circuit designed a new type of Hall-muscle tension medical transducer. Discusses the design principle, carried out Hall-muscle tension transducer of the theoretical calculations and experimental studies. Combined with the results of experiments redesign of the medical transducer. Transducer configuration of power supply, digital meters, linear amplifier and interface circuit, constitute a perfect muscle tension experimental apparatus. Results： Muscle Tension Experiment using non-contact magnetic sampling methods, so that the transducer circuit system and are not directly part of the force, to improve the reliability. Experimental results more clearly and the damage is not easy. With verification, measurement, research and application of the experimental projects, the experiment is rich in content.Help to improve their ability to research and experimental skills. Realized can verify the laws of physics as well as medical applications combined with the purpose of teaching.Conclusions： The results of the analysis shows： R=0.99999, SD=-0.40627, P 〈 0.0001.Experimental results show the Hall-muscle tension transducer theory. Can guide the medical transducer experimental teaching.