| 基于ADS1248高精度测温装置的设计 |
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| 引用本文： | 张树青,李妍,王步洲,李朝阳,李国吉.基于ADS1248高精度测温装置的设计[J].河北工业科技,2013,30(4):249-252. |
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| 作者姓名： | 张树青 李妍 王步洲 李朝阳 李国吉 |
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| 作者单位： | 航空四站装备修理厂;河北工业大学计算机科学与软件学院;东旭集团有限公司;石家庄凯普特动力传输有限责任公司 |
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| 基金项目： | 河北省自然科学基金(E2012208006);河北省教育厅高等学校科学研究计划(ZH2011243);河北省教育厅高等学校科学研究计划自然科学优秀青年基金(Y2012018) |
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| 摘 要： | 针对疫苗的运送及仓储过程中对环境温度的严格要求,设计了高精度的测温装置。选用了Pt100作为温度传感器,采用四线制测量方法去除了传输线上的干扰,设计了比例测量法使系统的精度仅依赖于一个高精度电阻。选用的ADS1248芯片内部包含了PGA放大器及24位ADC芯片,降低了装置的复杂性,同时具有较高的分辨率。经测试,本装置的测温精确达到0.1℃,能够满足疫苗的运送及仓储的要求。
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| 关 键 词： | ADS1248 四线制测量 高精度测温 比例法 |
Design of high precision temperature measuring device based on ADS1248 |
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| ZHANG Shuqing,LI Yan,WANG Buzhou,LI Chaoyang and LI Guoji.Design of high precision temperature measuring device based on ADS1248[J].Hebei Journal of Industrial Science & Technology,2013,30(4):249-252. |
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| Authors: | ZHANG Shuqing LI Yan WANG Buzhou LI Chaoyang and LI Guoji |
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| Institution: | 1.Aircraft Four Stations Repair Equipment Factory,Shijiazhuang Hebei 050071,China;2.School of Computer Science and Engineering,Hebei University of Technology,Tianjin 300401,China;3.Dongxu Group Company Limited,Shijiazhuang Hebei 050000,China;4.Shijiazhuang Captain Power Transmission Company Limited,Shijiazhuang Hebei 050000,China) |
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| Abstract: | Due to the strict requirement of environment temperature on the transportation and storage of vaccine,a temperature measuring device with high precision is introduced.Pt100 is selected as temperature sensor,the interference of transmission line is removed by using four-lines measuring method.And a ratio measurement method is designed so that the precision of the system depends only on a high precision resistor.The using chip of ADS1248 contains a PGA amplifier and a 24 bit ADC chip,which reduces the complexity of the device and provides high resolution.The measurement precision reaches 0.1 ℃,meeting the vaccine delivery and storage requirement. |
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| Keywords: | ADS1248 four-lines resistance measurement high precision temperature measurement ratio measurement method |
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