可调空间聚焦低频脉冲电磁场发生装置研制  

Development of low frequency pulsed electromagnetic fields generator with adjustable space focus

作　　者：焦明克[1] 胡劼[2] 张鹏[1] 楼林[1] 耿西亮[1] 王忠明[1] 廖西江[1] 许文娟[1] 付勇[1] 

机构地区：[1]兰州军区乌鲁木齐总医院,新疆乌鲁木齐830000 [2]新疆医科大学附属中医院,新疆乌鲁木齐830000

出　　处：《中国医学物理学杂志》2016年第3期248-251,共4页Chinese Journal of Medical Physics

基　　金：国家自然科学基金(81301344)

摘　　要：目的：研制空间聚焦和频率强度可调的低频脉冲电磁场（PulsedElectromagneticFields，PEMF）发生装置。方法：采用以单片机STC89C52为基础的智能可调低频脉冲信号发生器产生不同频率占空比的低频脉冲信号；该信号经预放大滤波后，由PA19构成的功率放大电路进行放大，驱动后级可调空间聚焦电磁场发射架；PEMF强度和空间分布通过特斯拉计HT108进行测量。结果：PEMF发生装置能够产生频率肌2kHz、占空比10％～80％和强度0-400mT可调的PEMF，且空间聚焦效果明显。结论：PDMF发生装置具有输出PEMF各参数可调范围大、电磁场聚焦范围空间可调等优点，适合用于电磁场非热生物效应研究。Objective To develop a low frequency pulsed electromagnetic fields （PEMF） generator with adjustable frequency, intensity and space focus. Methods Based on the single chip STC89C52, the intelligent adjustable low frequency pulsed signal generator was designed to output the low frequency pulsed signals with different frequencies and duty cycles. After the signals were pre-amplified and filtered, the preproeessed signals were amplified by the power amplifier circuit composed of PAl9 to drive the adjustable space focus electromagnetic fields transmitting mechanism. Finally, the PEMF intensity and distribution of electromagnetic fields were measured by using Teslameter HT108. Results The proposed PEMF equipment generated adjustable PEMF with the frequency of 0-2 kHz, duty cycle ranging from 10% to 80%, and intensity ranging from 0 naT to 400 roT. And the space focus effect of PEMF was obvious. Conclusion The PEMF generator with wide adjustable range of output PEMF parameters and adjustable space focus was suitable for the non-thermal biological effect of electromagnetic fields.

关 键 词：低频脉冲 占空比 电磁场 生物效应 空间聚焦 

分 类 号：R312[医药卫生—基础医学]