毛细管电泳芯片高压电源系统  

Design of High Voltage Power Supply System for Capillary Electrophoresis Microchip

作　　者：杨晓博[1] 闫卫平[2] 杨飞[1] 谢路冰[2] 

机构地区：[1]许昌学院电气信息工程学院,河南许昌461000 [2]大连理工大学电子科学与技术学院,辽宁大连116024

出　　处：《仪表技术与传感器》2013年第2期83-86,共4页Instrument Technique and Sensor

基　　金：河南省基础与前沿技术研究计划项目

摘　　要：以STM32F103微控制器为核心,采用集成的高压模块,设计了用于毛细管电泳芯片检测的高压电源系统。通过闭环反馈对高压模块的输出进行控制,提高了输出电压的稳定性。采用继电器阵列电路实现了电极的快速切换,减少了人为因素的干预。用户可以通过键盘设置进样、分离过程中的电压和时间,通过LCD实时显示当前的电压值。实现了由0～5 V控制0～5 000 V的三路连续可调电压输出,输出电压相对误差小于0.3%,最大输出电流为0.25 mA.系统具有体积小、输出电压稳定、自动化程度较高等优点,能够满足毛细管电泳芯片检测的需要。A high-voltage power supply system with the core STM32F103 microprocessor and three high-voltage modules was presented. The stability of high-voltage output was improved by adopting closed-loop feedback control. Electrodes switch were achieved by relay array which greatly reduced the human disturbance. The injection voltage and time can be set by keyboard as well as the separation voltage and time. LCD can show the real-time voltage value, and monitor the current detecting state. Three continuously tunable output voltages were obtained from 0 V to 5 000 V. The relative error of output voltages was less than 0. 3% and the maximum output current was 0. 25 mA. This system has the advantages of small size, steady output, higher automation which could meet the detection of capillary electrophoresis microchip.

关 键 词：毛细管电泳芯片 STM32F103 高压模块 继电器阵列 

分 类 号：TP273.5[自动化与计算机技术—检测技术与自动化装置]