| 可燃气体数字显示探头设计 |
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| 引用本文： | 张立国,佟仕忠,付贵增,马书闻.可燃气体数字显示探头设计[J].现代电子技术,2010,33(17):160-163. |
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| 作者姓名： | 张立国 佟仕忠 付贵增 马书闻 |
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| 作者单位： | 辽宁石油化工大学,信息与控制工程学院,辽宁,抚顺,113001 |
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| 摘 要： | 设计一种可燃气体数字显示探头,介绍了数字显示探头的工作原理及其软、硬件的设计。显示探头的探测器由TGS842半导体金属氧化物可燃气体传感器构成,配以OP07放大器对检测信号进行放大,利用高精度的数字电位器根据不同环境对零点、量程做相应的调整,并用TLC549实现A/D转换把数字信号传送给AT89C51微控器,从而实现可燃气体浓度的实时显示和声光报警。再由XTR105芯片把标准的4～20 mA电流信号传送给中央控制系统,同时用软件对信号进行滤波、报警处理。
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| 关 键 词： | 检测电桥 霍尔元件 电源模块 报警处理 |
Design of Digital Display Probe for Combustible Gas |
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| ZHANG Li-guo,TONG Shi-zhong,FU Gui-zeng,MA Shu-wen.Design of Digital Display Probe for Combustible Gas[J].Modern Electronic Technique,2010,33(17):160-163. |
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| Authors: | ZHANG Li-guo TONG Shi-zhong FU Gui-zeng MA Shu-wen |
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| Affiliation: | (School of Control and Information Engineering, Liaoning Shihua University, Fushun 113001, China) |
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| Abstract: | A kind of combustible gas digital display probe is designed. The working principle and software ＆ hardware design of the digital display probe are introduced. The detector of the probe is composed of TGS842 semiconductor metallic oxide combustible gas sensor, coupled with OP07 amplifier to amplify the detected signal. The high-precision digital potentiometer is used to adjust the measuring range and zero. The TLC549 is employed to achieve A / D eonvertion and transmit the digital signal to the AT89C51 microcontroller to implement the real-time display and sound and light alarm of combustible gas concentration, and then transmit the standard 4-20 mA current signal to the central eontrol system by the XTR105 chips. At the same time, the signal is filtered and alarm is processed with the software. |
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| Keywords: | detection bridge Hall element power supply module alarm handling |
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