| 霍尔式肌张力换能器原理与医学物理实验设计 |
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| 引用本文： | 邱召运,刘发明,刘其涛,郭顺生,姜广东.霍尔式肌张力换能器原理与医学物理实验设计[J].实验室研究与探索,2010,29(1). |
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| 作者姓名： | 邱召运 刘发明 刘其涛 郭顺生 姜广东 |
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| 作者单位： | 潍坊医学院,医用物理教研室,山东,潍坊,261053 |
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| 摘 要： | 采用线性霍尔电路和永磁体,基于悬臂梁弹性体系统,研制了一种霍尔式肌张力换能器。2个线性霍尔电路以永磁体为对称中心,构成对称互补取样电路,以差分方式输出信号电压;张力使悬臂梁发生弹性形变,携带磁体产生位移并引起磁场变化,应用霍尔效应实现了肌张力与信号电压的线性变换。取样系统的对称互补式设计,抵消了非线性变量对测量的影响,换能器具有高线性度指标;差分式输出能够抑制共模干扰和零点漂移,并增大了信号幅度;非接触式的测量方法,提高了换能器的可靠性。新型换能器应用于医学物理实验,灵敏度高、抗干扰能力强,实验效果优于应变式换能器。
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| 关 键 词： | 换能器 物理实验 霍尔效应 肌张力 线性霍尔电路 |
Principle of Hall Type Muscle Tension Transducer and Experimental Design of Medical Physics |
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| QIU Zhao-yun,LIU Fa-ming,LIU Qi-tao,GUO Shun-sheng,JIANG Guang-dong.Principle of Hall Type Muscle Tension Transducer and Experimental Design of Medical Physics[J].Laboratory Research and Exploration,2010,29(1). |
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| Authors: | QIU Zhao-yun LIU Fa-ming LIU Qi-tao GUO Shun-sheng JIANG Guang-dong |
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| Institution: | QIU Zhao-yun,LIU Fa-ming,LIU Qi-tao,GUO Shun-sheng,JIANG Guangdong(Department of Medical Physics,Weifang Medical University,Weifang 261053,China) |
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| Abstract: | A Hall-type muscle tension transducer was developed by using linear Hall circuit and permanent magnet,based on a flexible cantilever beam system.Linear Hall-circuit uses two permanent magnets as the symmetric center,constitutes a complementary symmetric sampling circuit to output differential voltage signal.The tension makes the cantilever elastic deformation occurred,carrying magnets generate the magnetic field caused by displacement and changes.By application of Hall-effect the signal voltage and tension'... |
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| Keywords: | transducer physics experiment hall-effect muscle tension linear Hall circuit |
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