本文選題：高精度　切入點：通道干擾　出處：《電子器件》2017年03期

【摘要】：為滿足多路遠距離電流信號高精度采樣的需求,設計了一種基于FPGA的高精度多通道數據采集存儲電路。分析了測量電路各模塊誤差產生的原因,用電路等效理論推導了多通道采集時通道間交叉干擾引入的測量誤差,從設計角度出發(fā),提出了減小誤差提高測量精度的方法。對設計的多通道采集電路進行了多次測試實驗,測試結果表明,采集電路可實現(xiàn)對8路4 m A~20 m A電流信號高精度采集測量,測量精度優(yōu)于0.1%。
[Abstract]:In order to meet the demand of high precision sampling of multi-channel remote current signal, a high-precision multi-channel data acquisition and storage circuit based on FPGA is designed.In this paper, the causes of the errors in various modules of the measuring circuit are analyzed, and the measurement errors caused by the cross-interference between channels in multi-channel acquisition are deduced by using the circuit equivalent theory. From the point of view of design, a method to reduce the errors and improve the measurement accuracy is put forward.Many tests are carried out on the designed multi-channel acquisition circuit. The test results show that the acquisition circuit can realize the high precision acquisition and measurement of 8 channels of 4mA20 Ma current signal, and the measuring accuracy is better than 0.1.
【作者單位】： 中北大學儀器科學與動態(tài)測試教育部重點實驗室;
【基金】：動態(tài)測試技術重點實驗室開放基金(ZDSYSJ2015004)
【分類號】：TN791;TP274.2

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本文編號：1723360