| 一种隔离式频率电流转换器的设计 |
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| 引用本文： | 杨澎,丁继存,张磊. 一种隔离式频率电流转换器的设计[J]. 工矿自动化, 2013, 39(1): 113-115 |
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| 作者姓名： | 杨澎 丁继存 张磊 |
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| 作者单位： | 1. 兖州煤业股份有限公司济宁三号煤矿,山东济宁,272169
2. 兖州煤业股份有限公司济宁三号煤矿,山东济宁272169;中国矿业大学信电学院,江苏徐州221008 |
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| 摘 要： | 提出一种隔离式频率电流转换器的设计方案。该频率电流转换器采用PIC16F1823单片机采集200～1 000Hz频率信号,通过SPI协议与DA芯片MCP4911通信,将频率信号转换成电压信号,然后通过集成电路AD694将电压信号线性转换为标准的4～20mA电流信号。工业测试结果表明,该频率电流转换器的数据采集精度可达0.5级,误差范围小于±0.5%,满量程工作时电流为26.8±0.2mA,最低功耗仅为450mW。
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| 关 键 词： | 频率测量 频率电流转换 频率电压转换 电压电流转换 隔离变换 |
Design of an isolated F/I converter |
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| YANG Peng,DING Ji-cun,ZHANG Lei. Design of an isolated F/I converter[J]. Industry and Automation, 2013, 39(1): 113-115 |
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| Authors: | YANG Peng DING Ji-cun ZHANG Lei |
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| Affiliation: | 1(1.Jining No.3 Coal Mine,Yanzhou Coal Mining Co.,Ltd.,Jining 272169,China; 2.School of Information and Electrical Engineering,China University of Mining and Technology,Xuzhou 221008,China) |
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| Abstract: | The paper proposed design scheme of an isolated F/I converter.The converter uses PIC16F1823 single chip microcomputer to collect frequency signal of 200~1 000 Hz and transmits the frequency signal through SPI protocol to MCP4911 DA conversion chip for F/V conversion,then IC AD694 converts the voltage signal into standard current signal of 4~20 mA.The industrial testing result showed that the precision of data collection of the converter achieves 0.5 level,error range is less than ±0.5%,working current is 26.8±0.2 mA in full range,and the lowest power consumption is 450 nW. |
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| Keywords: | frequency measurement F/I conversion F/V conversion V/I conversion isolated conversion |
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