本文選題：高精度　切入點(diǎn)：通道干擾　出處：《電子器件》2017年03期

【摘要】：為滿足多路遠(yuǎn)距離電流信號(hào)高精度采樣的需求,設(shè)計(jì)了一種基于FPGA的高精度多通道數(shù)據(jù)采集存儲(chǔ)電路。分析了測(cè)量電路各模塊誤差產(chǎn)生的原因,用電路等效理論推導(dǎo)了多通道采集時(shí)通道間交叉干擾引入的測(cè)量誤差,從設(shè)計(jì)角度出發(fā),提出了減小誤差提高測(cè)量精度的方法。對(duì)設(shè)計(jì)的多通道采集電路進(jìn)行了多次測(cè)試實(shí)驗(yàn),測(cè)試結(jié)果表明,采集電路可實(shí)現(xiàn)對(duì)8路4 m A~20 m A電流信號(hào)高精度采集測(cè)量,測(cè)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(xué)儀器科學(xué)與動(dòng)態(tài)測(cè)試教育部重點(diǎn)實(shí)驗(yàn)室;
【基金】：動(dòng)態(tài)測(cè)試技術(shù)重點(diǎn)實(shí)驗(yàn)室開放基金(ZDSYSJ2015004)
【分類號(hào)】：TN791;TP274.2

【相似文獻(xiàn)】

相關(guān)期刊論文 前3條

1 萬耀;李小清;周云飛;潘海鴻;;基于FPGA多通道數(shù)據(jù)采集系統(tǒng)設(shè)計(jì)[J];微計(jì)算機(jī)信息;2007年05期

2 李志軍;李欣然;石吉銀;冷華;;用CPLD實(shí)現(xiàn)多通道數(shù)據(jù)采集系統(tǒng)的A/D轉(zhuǎn)換器控制電路設(shè)計(jì)[J];繼電器;2006年21期

3 ;[J];;年期

，

本文編號(hào)：1723360