一种用于电压产生传感器的新型智能接口

Xiujun Li, G. Meijer, E. J. Schnitger
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引用次数: 7

摘要

提出了一种新型的低成本智能接口,用于自生传感器,如热电堆和热电偶。所提出的接口作为直流电压或电流的异步转换器,采用输出为周期调制信号的松弛振荡器。单片机用于测量接口的输出信号,处理数据并输出被测量的传感器信号。该系统不需要精确的A/D转换器。实验结果表明,该接口能够测量0/spl sim/5 V范围内的电压,精度和分辨率分别为/spl plusmn/64 ppm和20 ppm。测量时间小于100ms。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A novel smart interface for voltage-generating sensors
A novel low-cost smart interface for self-generating sensors, for instance thermopiles and thermocouples, has been presented. The proposed interface acts as an asynchronous converter for DC voltages or currents employing a relaxation oscillator which output is a period-modulated signal. A microcontroller is used to measure the output signal from the interface, process data and output the measured sensor signal. The system does not need the accurate A/D converter. Experimental results show that the interface is able to measure voltages in the range of 0/spl sim/5 V, with an accuracy and resolution of /spl plusmn/64 ppm and 20 ppm, respectively. The measurement time is less than 100 ms.
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