具有欧姆压降自动补偿的电化学检测系统设计
PDF下载 (389)陈 庚,谢建军,章政焕,张春风,邬杨波.具有欧姆压降自动补偿的电化学检测系统设计[J].宁波大学学报(理工版),2019,32(5):23-29.DOI:
CHEN Geng,XIE Jianjun,ZHANG Zhenghuan,ZHANG Chunfeng,WU Yangbo.Design of electrochemical detection system with automatic ohmic drop compensation[J].Journal of Ningbo University(Natural Science & Engineering Edition),2019,32(5):23-29.DOI:
| Title: | Design of electrochemical detection system with automatic ohmic drop compensation |
| 作者: | 陈 庚, 谢建军, 章政焕, 张春风, 邬杨波 |
| Author(s): | CHEN Geng, XIE Jianjun, ZHANG Zhenghuan, ZHANG Chunfeng, WU Yangbo |
| 关键词: | 欧姆压降; 自动补偿; 快速伏安; 电化学 |
| Keywords: | ohmic drop; automatic compensation; fast voltammetry; electrochemistry |
| 分类号: | TP23 |
| 文献标识码: | A |
| 摘要: | 提出了一种具有欧姆压降自动补偿功能的基于快速伏安法的电化学检测系统. 系统使用微控制器内建模数转换器结合外部电平调节电路产生快速扫描信号, 用数字电位器实现溶液欧姆压降的正反馈补偿, 通过测量输出信号频率判断是否实现欧姆压降的完全补偿, 然后通过调整数字电位器抽头位置调整补偿信号大小, 从而实现检测系统溶液欧姆压降自动补偿功能. 二茂铁(Fe(C5H5)2)溶液的实际测试结果表明, 在不同溶液浓度和不同扫描速度情况下, 系统能较好地实现溶液欧姆压降自动补偿, 以及输出电流信号的自动检测功能. |
| Abstract: | In this paper, we propose a novel fast voltammetry electrochemical detection system with automatic electrolyte ohmic drop compensation. The fast sweeping waveform is produced by the build-in digital-to-analog converter of the microcontroller. The positive feedback of ohmic drop compensation is realized using a digital potentiometer. By measuring the output signal frequency to determine whether or not the ohmic drop is fully compensated, the microcontroller is utilized to adjust the compensation signal level by tuning the tap position of digital potentiometer, so that the ohmic drop automatic compensation is attained. The experimental results show that the proposed electrochemical detection system can better realize automatic compensation of ohmic drop and automatic detection of output current in the case of different solution concentration and different scanning speed using ferrocene (Fe(C5H5)2) solution. |
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| 备注/Memo: | 收稿日期: 2019－04－16. 宁波大学学报（理工版）网址: http://journallg.nbu.edu.cn/ 基金项目: 国家自然科学基金（81773483, 41576098）; 宁波市自然科学基金（2018A610401）; 浙江省基础公益研究计划（LGF19B050003）. 第一作者: 陈庚（1995－）, 男, 浙江温州人, 在读硕士研究生, 主要研究方向: 嵌入式系统设计. E-mail: 472273599@qq.com 宁波大学学报（理工版）网址：http://journallg.nbu.edu.cn/*通信作者: 邬杨波（1972－）, 男, 浙江奉化人, 博士/副教授, 主要研究方向: 嵌入式系统设计. E-mail: wuyangbo@nbu.edu.cn |
