水质综合毒性在线检测仪设计  

Design of water synthetic toxicity online detector

作　　者：何祥长 张荣福[1] 吴晓 

机构地区：[1]上海理工大学光电信息与计算机工程学院,上海200093 [2]上海科源电子科技有限公司,上海201101

出　　处：《电子测量技术》2016年第11期1-5,共5页Electronic Measurement Technology

摘　　要：目前我国在水质毒性检测领域,以人工现场采样、实验室仪器分析为主要方式,存在采样误差大、检测工序繁琐、不能及时反映水体受污染变化状况等缺陷,难以满足水环境监测发展需求。鉴于此,本文在发光细菌法的基础上设计了一种可实现在线监测的水质综合毒性检测仪。硬件部分设计了一种新型光电检测电路,以STM32F103ZGT6为核心,利用光电倍增管将采集到的荧光信号转化为微弱的电流信号,经后续电路放大处理并A/D转换后传输至单片机,再通过RS232和RS485与PC端通信。辅助相关软件系统可以对水质综合毒性数据进行实时监控和在线智能分析。实验结果表明,该仪器可在10min内完成检测,能有效分辨出1mg/L的毒性物质,具有良好的灵敏度、准确性和重复性,适用于绝大多数水体的综合毒性在线监测。At present ,artificial field sampling and laboratory instrument analysis are the main ways to test water toxicity ,which has defects that sampling error is big ,detection process is complex ,fails to reflect the status of polluted water changes in time .It is difficult to meet the demand of the water environment monitoring development . Therefore ,this paper designs a kind of water synthetic toxicity online detector based on luminescent bacteria .It has designed a photoelectric detection circuit in the hardware .The device with STM32F103ZGT6 as the core ,using photomultiplier tubes to collect fluorescence signals and turning into a weak current signal ,after a follow‐up circuit amplification processing and A/D conversion transmit to MCU .Then communication with PC through RS232 and RS485 .With related software system ,it can be real‐time monitoring and online intelligent analysis .The experiments show that it can be finished within 10 minutes ,and it can effectively distinguish 1 mg/L of toxic substances .The detector has good sensitivity ,accuracy and repeatability ,which is suitable for most kinds of water synthetic toxicity online monitoring .

关 键 词：水质综合毒性 发光细菌法 光电检测电路 在线监测 

分 类 号：TH710[机械工程—测试计量技术及仪器]