医学动植物实验用热电偶测温装置的设计  

Design of thermocouple temperature measurement device for physic propagation experiments

作　　者：王艳[1] 许红玉[1] 陈兆学[1] 

机构地区：[1]上海理工大学医疗器械与食品学院医学影像工程研究所,上海市200093

出　　处：《中国组织工程研究与临床康复》2011年第33期6196-6198,共3页Journal of Clinical Rehabilitative Tissue Engineering Research

基　　金：上海高校特聘教授(东方学者)岗位计划资助~~

摘　　要：背景:目前温度测量多为环境测量,无法准确测量胚胎发育温度和幼体发育温度。目的:研究基于AD595芯片的医学动植物实验用热电偶测温装置的设计方案。方法:实验设计包括信号的输入模块,信号的放大模块和信号的显示模块。信号由接插件端口送至AD595进行电阻电容网络去噪后送给AD620进行放大。放大后的信号经数模转换后送给单片机,最后通过3位8段码LED进行显示。结果与结论:缝入动物体内的K型热电偶可以精确测量出胚胎发育温度和幼体发育温度。实验发现大明虾孵化温度为20～22℃有利于雌性化。采用AD595芯片设计的热电偶测温电路方案切实可行,效果稳定。同时可以有效降低电磁干扰和误差,便于软件的升级和改进。BACKGROUND：At present,temperature measurements focus on environmental measurement,which cannot precisely measure embryonic and juvenile development temperature OBJECTIVE：To investigate the design of thermocouple temperature measurement device for physic propagation experiments based on chip AD595.METHODS：AD595 was specifically designed for K-type thermocouple with built-in cold junction compensation circuit,and could effectively enlarge the heat electromotive force generated by the thermocouple during temperature measurements.Design introduced included three parts：input module,amplificatory module and display module.The signal was transmitted to AD595 by plug.After RC filtering,the signal was amplified by AD620 and then sent to the Single Chip Micyoco to drive the LED.Finally,the temperature information could be displayed by the LED.RESULTS AND CONCLUSION：The fetation temperature could be measured accurately by the presented design of thermocouple temperature measurement device.The experimental results indicate that the temperature ranged from 20℃ to 22℃,which was propitious to the female shrimp.With stable effect and convenience for software update and improvement,it is applicable using AD595 for the design of thermocouple temperature measurement device.The measurement error and electromagnetic disturbance can also be efficiently declined.

关 键 词：测温 AD595芯片 热电偶 传感器 动物 植物 

分 类 号：R318[医药卫生—生物医学工程]