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基于多个变压器的高精度共振电容桥的研究

Xin Liu¹, Yuzhu Chen¹, Longqi Wang¹

¹Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China.

Sensors (Basel, Switzerland)

|June 27, 2024

概括

这项研究提出了一种新的方法,用于降低在共振桥上的热噪声,用于引力波检测. 这种新方法提高了Taiji程序的灵敏度,提高了电容感应分辨率.

科学领域:

天体物理学和宇宙学
引力波天文学引力波天文学
仪器仪表和测量仪器的使用

背景情况:

太极计划旨在检测中低频率的引力波 (0.1毫赫兹到1赫兹).
为了达到所需的加速残留灵敏度 (3 × 10-15 ms-2 / Hz 1/2) 需要1aF / Hz 1/2的电容感应分辨率.
现有的共振电容桥在降噪和参数优化方面面临着挑战.

研究的目的:

引入一种新的方法来减少共振电容桥上的热噪声.
为了提高引力波检测系统的电容传感分辨率.
为了减轻对桥梁系统内的其他参数的性能要求.

主要方法:

开发了一种新的方案,以减少桥梁的热噪声,而不必优化现有的变压器参数.
利用模拟来预测降噪和参数影响.
对拟议的降噪方案进行实验验证.

主要成果:

模拟显示噪声降低到原始水平的0.7倍.
该方案在与其他参数优化相结合时,进一步降低了噪音.
实验结果证实噪声降低0.7倍,电容感应分辨率提高到0.6aF/Hz^1/2.

结论:

拟议的方法有效地减少了共振电容桥梁中的热噪声.
增强的电容传感分辨率支持太极计划的引力波检测目标.
该方法减轻了其他桥梁性能参数的约束,并提高了对频率变化的稳定性.

关键词:

引力波是一种引力波.低频度测量测量低频度测量测量低频度测量噪声分析噪声分析一个共振桥的共振桥.变压器变压器变压器变压器

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