【摘 要】
：
为了得到热疗用交变磁场场强的空间分布,设计并研制了基于DSP的磁场测量装置.该装置由3个部分构成:交变磁场传感器、感应电压信号处理采集模块和线圈传感器的三轴运动导轨.交
【机 构】
：
东南大学生物电子学国家重点实验室,东南大学江苏省生物材料与器件重点实验室,
论文部分内容阅读
为了得到热疗用交变磁场场强的空间分布,设计并研制了基于DSP的磁场测量装置.该装置由3个部分构成:交变磁场传感器、感应电压信号处理采集模块和线圈传感器的三轴运动导轨.交变磁场传感器由面积很小的单匝线圈构成,相对较大的磁场分布空间,通过小线圈的磁场可近似视为均匀.线圈测得的磁场信号经过前端处理转化为数字信号.通过三轴运动导轨控制传感器的位置可以得到空间各点的磁场强度信号.由于DSP F2812具有良好的运动控制功能以及片载A/D较高采样的频率,可用来控制整个系统.根据磁场强度的分布可以确定热疗中升温效果最好的空间.
In order to obtain the spatial distribution of the field strength of alternating magnetic field for hyperthermia, a DSP-based magnetic field measurement device is designed and developed.The device consists of three parts: alternating magnetic field sensor, induction voltage signal processing acquisition module and coil sensor triaxial Motion track.The alternating magnetic field sensor consists of a small area of single-turn coil, a relatively large magnetic field distribution space, the magnetic field through a small coil can be approximated as uniform.Film magnetic field signal measured by the front-end processing into digital signals. The magnetic field strength signal of each point of the space can be obtained by controlling the position of the sensor through the three-axis motion guide rail.The DSP F2812 can be used to control the entire system due to its good motion control function and high sampling frequency of on-chip A / D, Distribution can determine the hyperthermia heating effect of the best space.
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