Investigation on Stray-Capacitance Influences of Coaxial Cables in Capacitive Transducers for a Space Inertial Sensor
| العنوان: | Investigation on Stray-Capacitance Influences of Coaxial Cables in Capacitive Transducers for a Space Inertial Sensor |
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| المؤلفون: | Cheng-Rui Wang, Zebing Zhou, Ying Wang, Ke Li, Jian-Bo Yu, Ming Hu, Qu Shaobo, Yanzheng Bai, Shu-Chao Wu, Zhuxi Li |
| المصدر: | Sensors, Vol 20, Iss 3233, p 3233 (2020) Sensors (Basel, Switzerland) Sensors Volume 20 Issue 11 |
| بيانات النشر: | MDPI AG, 2020. |
| سنة النشر: | 2020 |
| مصطلحات موضوعية: | Physics::General Physics, Coaxial cable, Preamplifier, Capacitive sensing, Acoustics, lcsh:Chemical technology, 01 natural sciences, Biochemistry, Article, Physics::Geophysics, Analytical Chemistry, law.invention, Physics::Fluid Dynamics, Parasitic capacitance, law, space inertial sensor, capacitive transducer, 0103 physical sciences, lcsh:TP1-1185, Electrical and Electronic Engineering, 010306 general physics, Transformer, Instrumentation, Physics, 010401 analytical chemistry, Linear variable differential transformer, stray-capacitance, Atomic and Molecular Physics, and Optics, 0104 chemical sciences, Transducer, Physics::Space Physics, Astrophysics::Earth and Planetary Astrophysics, Coaxial, coaxial cables |
| الوصف: | Ultra-sensitive inertial sensors are one of the key components in satellite Earth&rsquo s gravity field recovery missions and space gravitational wave detection missions. Low-noise capacitive position transducers are crucial to these missions to achieve the scientific goal. However, in actual engineering applications, the sensor head and electronics unit usually place separately in the satellite platform where a connecting cable is needed. In this paper, we focus on the stray-capacitance influences of coaxial cables which are used to connect the mechanical core and the electronics. Specially, for the capacitive transducer with a differential transformer bridge structure usually used in high-precision space inertial sensors, a connecting method of a coaxial cable between the transformer&rsquo s secondary winding and front-end circuit&rsquo s preamplifier is proposed to transmit the AC modulated analog voltage signal. The measurement and noise models including the stray-capacitance of the coaxial cable under this configuration is analyzed. A prototype system is set up to investigate the influences of the cables experimentally. Three different types and lengths of coaxial cables are chosen in our experiments to compare their performances. The analysis shows that the stray-capacitance will alter the circuit&rsquo s resonant frequency which could be adjusted by additional tuning capacitance, then under the optimal resonant condition, the output voltage noises of the preamplifier are measured and the sensitivity coefficients are also calibrated. Meanwhile, the stray-capacitance of the cables is estimated. Finally, the experimental results show that the noise level of this circuit with the selected cables could all achieve 1-2 × 10&minus 7 pF/Hz1/2 at 0.1 Hz. |
| وصف الملف: | application/pdf |
| اللغة: | English |
| تدمد: | 1424-8220 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::140d4b398d253ac7d73e7440d808e09f https://www.mdpi.com/1424-8220/20/11/3233 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....140d4b398d253ac7d73e7440d808e09f |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 14248220 |
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