Exploring on the Sensitivity Changes of the LC Resonance Magnetic Sensors Affected by Superposed Ringing Signals
| العنوان: | Exploring on the Sensitivity Changes of the LC Resonance Magnetic Sensors Affected by Superposed Ringing Signals |
|---|---|
| المؤلفون: | Tingting Lin, Ling Wan, Zhou Kun, Wang Pengfei, Jing Zhao, Yu Sijia |
| المصدر: | Sensors (Basel, Switzerland) Sensors; Volume 18; Issue 5; Pages: 1335 Sensors, Vol 18, Iss 5, p 1335 (2018) |
| بيانات النشر: | MDPI AG, 2018. |
| سنة النشر: | 2018 |
| مصطلحات موضوعية: | detection sensitivity, Materials science, noise level, 02 engineering and technology, LC circuit, lcsh:Chemical technology, 010502 geochemistry & geophysics, 01 natural sciences, Biochemistry, Noise (electronics), Article, Analytical Chemistry, law.invention, ringing signals, Optics, Interference (communication), law, lcsh:TP1-1185, LC resonance magnetic sensors, Electrical and Electronic Engineering, Instrumentation, 0105 earth and related environmental sciences, business.industry, White noise, Ringing, 021001 nanoscience & nanotechnology, Atomic and Molecular Physics, and Optics, Magnetic field, Hall effect sensor, Resistor, 0210 nano-technology, business |
| الوصف: | LC resonance magnetic sensors are widely used in low-field nuclear magnetic resonance (LF-NMR) and surface nuclear magnetic resonance (SNMR) due to their high sensitivity, low cost and simple design. In magnetically shielded rooms, LC resonance magnetic sensors can exhibit sensitivities at the fT/√Hz level in the kHz range. However, since the equivalent magnetic field noise of this type of sensor is greatly affected by the environment, weak signals are often submerged in practical applications, resulting in relatively low signal-to-noise ratios (SNRs). To determine why noise increases in unshielded environments, we analysed the noise levels of an LC resonance magnetic sensor (L ≠ 0) and a Hall sensor (L ≈ 0) in different environments. The experiments and simulations indicated that the superposed ringing of the LC resonance magnetic sensors led to the observed increase in white noise level caused by environmental interference. Nevertheless, ringing is an inherent characteristic of LC resonance magnetic sensors. It cannot be eliminated when environmental interference exists. In response to this problem, we proposed a method that uses matching resistors with various values to adjust the quality factor Q of the LC resonance magnetic sensor in different measurement environments to obtain the best sensitivity. The LF-NMR experiment in the laboratory showed that the SNR is improved significantly when the LC resonance magnetic sensor with the best sensitivity is selected for signal acquisition in the light of the test environment. (When the matching resistance is 10 kΩ, the SNR is 3.46 times that of 510 Ω). This study improves LC resonance magnetic sensors for nuclear magnetic resonance (NMR) detection in a variety of environments. |
| وصف الملف: | application/pdf |
| تدمد: | 1424-8220 |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8c923c5e842f1d9a181980a839ef2dd0Test https://doi.org/10.3390/s18051335Test |
| حقوق: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....8c923c5e842f1d9a181980a839ef2dd0 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 14248220 |
|---|