本文選題：電磁法 + 梯度測(cè)量　； 參考：《儀器儀表學(xué)報(bào)》2017年04期

【摘要】：梯度測(cè)量對(duì)提高電磁法勘探的分辨能力和壓制環(huán)境噪聲干擾具有重要意義。通過硬件差分直接測(cè)量梯度場(chǎng)和先測(cè)量絕對(duì)場(chǎng)后經(jīng)軟件差分計(jì)算求取梯度場(chǎng)是實(shí)現(xiàn)電磁梯度數(shù)據(jù)獲取的兩種典型方式。給出了這兩種測(cè)量方式的具體實(shí)現(xiàn)方案,并對(duì)測(cè)量效果進(jìn)行了對(duì)比分析,探究了誤差來源和壓制方法。研究表明,測(cè)量通道的不一致性,尤其是相位差是影響電磁梯度測(cè)量準(zhǔn)確性的關(guān)鍵因素。對(duì)于硬件差分直接測(cè)量梯度場(chǎng)而言,這種通道不一致引起的誤差難以通過事后校準(zhǔn)的方法消除,且誤差大小隨梯度值減小而急劇增加,最終不可用。先測(cè)量絕對(duì)場(chǎng)后進(jìn)行軟件差分的方法,可以得到更小的測(cè)量誤差,而且通過通道校準(zhǔn)后,測(cè)量精度得到進(jìn)一步提高。在不能確保采集通道高度一致的情況下,先測(cè)量絕對(duì)場(chǎng)再求取梯度場(chǎng)的方式是實(shí)現(xiàn)電磁梯度測(cè)量的最優(yōu)途徑,該方法還可以同時(shí)獲取絕對(duì)場(chǎng)以輔助梯度數(shù)據(jù)解釋。該研究成果為電磁梯度系統(tǒng)開發(fā)提供了有益參考。依據(jù)該方法所研制的頻率域電磁場(chǎng)梯度采集系統(tǒng)在江蘇灘涂獲得的實(shí)驗(yàn)結(jié)果也證明了該測(cè)量方法的優(yōu)越性。
[Abstract]:Gradient measurement is of great significance to improve the resolution of electromagnetic exploration and to suppress noise interference in the environment. It is two typical ways to obtain the electromagnetic gradient data by measuring the gradient field directly by the hardware differential and measuring the absolute field first after the measurement of the absolute field. This gives the concrete realization of the two kinds of measurement methods. The result of the measurement is compared and analyzed, and the error source and the suppression method are explored. The research shows that the inconsistency of the measurement channel, especially the phase difference is the key factor affecting the accuracy of the electromagnetic gradient measurement. For the gradient field of the hardware differential direct measurement, the error caused by this channel inconsistency is difficult to be calibrated afterwards. The method is eliminated, and the size of the error increases sharply with the decrease of the gradient value, and it is not available at last. The method of software difference after measuring the absolute field can get smaller measurement error, and the measurement accuracy is further improved after the channel calibration. The absolute field is measured first when the height of the collection channel can not be ensured. The method of obtaining the gradient field is the best way to realize the measurement of the electromagnetic gradient. The method can also obtain the absolute field at the same time to assist the interpretation of the gradient data. The results provide useful reference for the development of the electromagnetic gradient system. The experimental results obtained by the frequency domain electromagnetic gradient recovery system developed in this method are obtained in the Jiangsu beach. The superiority of the method is also proved.

【作者單位】： 吉林大學(xué)地球信息探測(cè)儀器教育部重點(diǎn)實(shí)驗(yàn)室;吉林大學(xué)儀器科學(xué)與電氣工程學(xué)院;
【基金】：吉林省重點(diǎn)科技攻關(guān)項(xiàng)目(20150204021G X) 國(guó)家重大科學(xué)儀器設(shè)備開發(fā)專項(xiàng)(2011YQ030133)資助
【分類號(hào)】：P631.325

【相似文獻(xiàn)】

相關(guān)期刊論文 前6條

1 J.O.巴隆戈;劉清泉;;航空磁力鉛垂梯度異常的深度計(jì)算方法[J];石油物探譯叢;1986年02期

2 郭志宏,管志寧,熊盛青;長(zhǎng)方體ΔT場(chǎng)及其梯度場(chǎng)無解析奇點(diǎn)理論表達(dá)式[J];地球物理學(xué)報(bào);2004年06期

3 高麗坤;蔣甫玉;張鳳旭;李顏貴;孟令順;;含油氣球冠模型三維重力歸一化總梯度場(chǎng)特征[J];物探與化探;2010年02期

4 劉洪學(xué) ,朱金路;二維磁異常規(guī)格化全梯度方法的初步研究[J];物探與化探;1982年03期

5 侯重初,施志群;實(shí)現(xiàn)重磁異常規(guī)格化總梯度的傅氏積分法[J];石油物探;1986年03期

6 ;[J];;年期

相關(guān)碩士學(xué)位論文 前1條

1 金多;磁梯度場(chǎng)源研究[D];吉林大學(xué);2014年

，

本文編號(hào)：1796378