| 一种简单数字测温电路的设计 |
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| 引用本文： | 张江涛,吴学礼,孟 华.一种简单数字测温电路的设计[J].河北工业科技,2008,25(1):39-42. |
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| 作者姓名： | 张江涛 吴学礼 孟 华 |
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| 作者单位： | 河北科技大学电气信息学院,河北石家庄,050018 |
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| 摘 要： | 针对生产试验中低成本、高精度的需要,利用8位A/D转换芯片TLC549、单片机AT89C2051、放大器AD626和数码驱动芯片74HC595设计测温电路。电路中利用对桥电阻的合理选择改善桥的线性关系。理论分析和实际电路测试结果表明,该电路具有精度高、可靠性高、使用方便等优点。
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| 关 键 词： | 测温电路 线性处理 AD626 TLC549 |
| 文章编号： | 1008-1534（2008）01-0039-04 |
| 收稿时间： | 2007-04-02 |
| 修稿时间： | 2007-11-05 |
A simple design of the digital temperature measurement circuit |
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| ZHANG Jiang-tao,WU Xue-li and MENG Hua.A simple design of the digital temperature measurement circuit[J].Hebei Journal of Industrial Science & Technology,2008,25(1):39-42. |
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| Authors: | ZHANG Jiang-tao WU Xue-li and MENG Hua |
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| Institution: | ZHANG Jiang-tao,WU Xue-li,MENG Hua(College of Electrical Engineering , Information Science,Hebei University of Science , Technology,Shijiazhuang Hebei 050018,China) |
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| Abstract: | To meet the need for a temperature measurement circuit with low cost and high accuracy,the design is made with an A/D convertor TLC549 of eight bits, a single chip microcomputer AT89C2051, an amplifier AD626 and a LED drive chip 74HC595 are needed. The selection of proper bridge resistance advances the non-linearization of the bridge-circuit. The real circuit is easy to implement, and the test result shows its high precision,reliability,and convonience in use. |
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| Keywords: | temperature measurement circuit linear processing AD626 TLC549 |
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