摘要:介紹了采用MC68HCllE 9 單片機作為主芯片和較少的外圍電路設計的數字多用表，對儀表的智能校準技術和實現方法進行了深人的研究，實現了高精度的A/D轉換，得到了高準確度的測量結果;闡述了利用智能校準技術設計智能儀器儀表的可行性和實現
的技術路線。基于智能校準技術的數字多用表可以完成交流直流電壓、電流的測量，也可以測量電阻、周期和頻率，可以自動對測得的數據進行誤差修正。
關鍵詞:智能化 A/D轉換 校準 自動切換 量程

Abstract:T hed igitalm ultimeterd esignedb ya doptingM C68HCIIE 9 s inglec hipm icrocomputeras th em ainc hipa ndfe werpe ripheralci rcuits is introduced, The intelligent calibration technique and the realization methods were studied, A/D conversion with high precision was implemented,an dh ighlya ccuratem easuredre sultsw ereo btained.T hefe asibilitya ndth ete chnologyro utefo rd esigningin telligentin strumentsb yu sing
intelligent calibration technique are expounded. The measurement for AC&DC voltage and current, resistance period and frequency can be accomplished by using the digital multimeter based on intelligent calibration technique. The error of measured data can also be automatically revised.