用于检测农药残留的量热式生物传感器的半导体恒温仪的研究  

Study of Semiconductor Thermostat Used in the Rapid Thermal Detector of Pesticides

作　　者：赵肖磊[1] 郑艺华[1] 王芳芳[1] 华泽钊[1] 

机构地区：[1]上海理工大学制冷与低温生物技术研究所,上海200093

出　　处：《仪表技术与传感器》2004年第9期18-20,共3页Instrument Technique and Sensor

基　　金：国家自然科学基金会项目(50176032)

摘　　要：介绍一种用于检测农药残留的量热式生物传感器的半导体恒温仪的研制。该恒温仪基于塞贝尔效应,利用半导体制冷进行恒温。该仪器由恒温器与控制器部分组成。针对量热式生物传感器的参比法测量及流动分析的特点,恒温器采用相同结构参数的双流路对称布置。液体由流路下部流入,保证换热充分。控制器采用铂电阻采集温度信号,由智能调节器进行温度监控。可控温度范围由0～70℃;升降温时间短,不超过3min,控温精度小于±0 1℃。通过实验,恒温仪的恒温效果良好,控温精度高,符合检测要求。The semiconductor thermostat used in the rapid thermal detector of pesticides was studied.Based on the theory of the Peltier effect,semiconductor refrigeration is used to keep the constant temperature.This instrument consists of a thermostat and a controller.The thermostat is disposed symmetrically by two same flow ways aiming at the character of the biosensor:the referential means and the flow injection analysis.Fluid is flowed in the flow way from the bottom in order to exchange heat sufficiently.The temperature is inspected and controlled by an intelligent adjuster.The range of the adjusted temperature is 0～70 ℃.And the time of the temperature adjustment is less than 3 minutes.The precision of the temperature control is ±0.1 ℃.By experiments,the constant temperature performance and the precision of the temperature control are good,which is accord with the requestment.

关 键 词：农药残留 量热式生物传感器 半导体恒温仪 半导体制冷 塞贝尔效应 有机磷农药 

分 类 号：S481.8[农业科学—农药学] TP212.3[农业科学—植物保护]