本文選題：超導(dǎo)重力梯度儀　切入點(diǎn)：質(zhì)量匹配　出處：《華中科技大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：航空重力梯度儀作為最有效的資源勘探工具之一在全世界范圍內(nèi)得到了廣泛研究。超導(dǎo)重力梯度儀由于其噪聲水平低被公認(rèn)為是進(jìn)行資源高效勘探最有前景的儀器。然而,由于飛機(jī)運(yùn)動平臺的噪聲比較大,超導(dǎo)重力梯度儀很難達(dá)到其理論分辨率,實際的分辨率取決于其共模抑制比的大小。為了獲得高的共模抑制比,需對超導(dǎo)重力梯度儀中兩加速度計的參數(shù)進(jìn)行匹配,其中,檢驗質(zhì)量的匹配尤為重要,因為它直接決定了加速度計的本征頻率和傳遞函數(shù)。本文針對超導(dǎo)重力梯度儀中檢驗質(zhì)量的精密匹配提出了一種行之有效的工藝方法。根據(jù)超導(dǎo)重力梯度儀的測量原理,要達(dá)到1E Hz的分辨率,檢驗質(zhì)量的重量需匹配到相差100μg,隔板厚度需匹配到相差10μm,所有表面需實現(xiàn)光潔。對比了幾種均勻移除表面質(zhì)量的工藝方法后,我們選擇了電解的方法來對超導(dǎo)重力梯度儀中的檢驗質(zhì)量進(jìn)行匹配。為了獲得最佳工藝參數(shù),我們通過測試電解時極化曲線分析了溫度、槽壓、電極間距等對電解的影響。最終確定檢驗質(zhì)量匹配的參數(shù)為:電解液溫度10℃,槽壓7 V,兩極間距10mm。針對檢驗質(zhì)量的特殊形狀,我們分別設(shè)計了針對隔板匹配和質(zhì)量匹配的夾具。在電解過程中,由計算機(jī)控制流經(jīng)電解回路中的電量從事實現(xiàn)溶解質(zhì)量的精確控制。完成了一對檢驗質(zhì)量的匹配。重量匹配到相差約50μg,隔板厚度相差2μm,目前已成功應(yīng)用到超導(dǎo)重力梯度儀中。
[Abstract]:As one of the most effective tools for resource exploration, airborne gradiometers have been widely studied around the world. Superconducting gradiometers are recognized as the most promising instruments for resource efficient exploration because of their low noise level. It is difficult for the superconducting gradiometer to reach its theoretical resolution due to the large noise of the aircraft moving platform. The actual resolution depends on the magnitude of its common-mode rejection ratio, and in order to obtain the high common-mode rejection ratio, the superconducting gravity gradiometer is difficult to achieve its theoretical resolution. It is necessary to match the parameters of two accelerometers in the superconducting gradiometer, among which, it is very important to match the quality of the two accelerometers. Because it directly determines the intrinsic frequency and transfer function of accelerometers, this paper presents an effective process method for precision matching of test mass in superconducting gradiometers. According to the measuring principle of superconducting gradiometers, In order to achieve the resolution of 1E Hz, the weight of the test quality should be matched to 100 渭 g, the thickness of the partition should be matched to 10 渭 m, and all the surfaces should be smooth and clean. In order to obtain the best process parameters, we analyzed the temperature and the cell pressure by measuring the polarization curve of electrolytic time, and we chose the method of electrolysis to match the quality of the superconducting gradiometer. The influence of electrode spacing on electrolysis. The parameters of quality matching are determined as follows: electrolyte temperature 10 鈩，

本文編號：1606839