摘要
介绍了一种新型数字式智能功率表。该仪表采用 80 3 1单片机为控制核心 ,将被测电压、电流瞬时值的取样信号放大后 ,通过快速、高精度A/D转换器件AD5 74转换为数字量 ,经单片机运算和处理 ,结果送LED显示器显示。除测量功率外还可测功率因数并判断负载性质 ,测交流电压、电流和周期、频率 ,对电压和电流的取样能根据其大小分八档自动选择合适量程。具有技术性能强、测量精度高、读数清晰。
A new type of digital and intelligent dynamometer is introduced.This instrument adopts 8031 single chip microcomputer as its control center.When the sampled signals of measured voltage and instantaneous current are amplified,they will be converted digital data by the fast speed and high accuration A/D converter,then the signals will be sent to LED indicater for displaying after being operated and processed by single chip microcomputer. Except for the measurement of power value, it can also measure the power factor, judge the character of load , measure the alternating voltage, alternating current, periodical time and frequency. It can automatically select the appropriate measuring range according to the 8 different levels. This instrument possesses many different characters such as strong function of technology, high accuracy of measurement, conveniently being operated and the results can be easily identified.
出处
《控制工程》
CSCD
2003年第1期82-84,共3页
Control Engineering of China
