| 基于PIC单片机的本质安全型电流-频率转换电路设计 |
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| 引用本文： | 赵光绪.基于PIC单片机的本质安全型电流-频率转换电路设计[J].工矿自动化,2012,38(10):70-72. |
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| 作者姓名： | 赵光绪 |
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| 作者单位： | 中煤科工集团重庆研究院,重庆,400039 |
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| 摘 要： | 针对模拟量传感器的信号输出形式存在多样性的问题,设计了一种基于PIC单片机的本质安全型电流-频率转换电路。该电路采用本质安全电源供电,将模拟量电流信号经高精度采样电阻接地转换为电压信号并送入PIC单片机的A/D采样口,由软件处理后转换为频率信号。实际应用表明,该电路能满足各种电流型传感器方便接入煤矿安全监控系统的需求。
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| 关 键 词： | 煤矿 安全监控 电流型传感器 本质安全型 电流-频率转换 PIC单片机 |
Design of Intrinsic Safety Current-frequency Conversion Circuit Based on PIC Single-chip Microcomputer |
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| ZHAO Guang-xu.Design of Intrinsic Safety Current-frequency Conversion Circuit Based on PIC Single-chip Microcomputer[J].Industry and Automation,2012,38(10):70-72. |
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| Authors: | ZHAO Guang-xu |
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| Affiliation: | ZHAO Guang-xu(Chongqing Research Institute of CCTEG.,Chongqing 400039,China) |
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| Abstract: | In view of problem of diversity existed in signal output forms of analog sensor,an intrinsic safety current-frequency conversion circuit based on PIC single-chip microcomputer was designed.The circuit uses intrinsic safety power supply,and converts analog current signal into voltage signal through grounded sampling resistance with high precision and the signal is sent to A/D sampling interface of PIC single-chip microcomputer,then the signal is converted into frequency signal after processed by software.The actual application shows that the circuit can meet with requirements of various current type sensors accessed in coal mine safety monitoring and control system. |
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| Keywords: | coal mine safety monitoring and control current type sensor intrinsic safety current-frequency conversion PIC single-chip microcomputer |
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