小航向误差的无死区光泵磁力仪

IF 4.3 2区综合性期刊 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Sensors Journal Pub Date : 2025-06-18 DOI:10.1109/JSEN.2025.3579154

Volkmar Schultze;Theo Scholtes;Florian Wittkämper;Ronny Stolz

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引用次数: 0

摘要

介绍了一种光泵磁强计（OPM），用于在移动平台上对地磁场进行敏感测量。它基于垂直排列的两个铯蒸汽电池的调幅光泵浦，具有全向灵敏度。在一个差分方案中，传感器的航向误差得到了显著的抑制，该差分方案使用了两个平衡良好的圆偏振激光束，每个单元的螺旋度相反。此外，自旋驱动频率的调制消除了由于解调相移和不稳定性导致的传感器读出中的潜在系统误差。在屏蔽环境下，我们展示了全向传感特性，对于任意传感器方向，平均最大航向误差为0.4 nT，在传感器3-dB带宽为1 kHz的情况下，噪声限制磁通密度分辨率为1.8 pT/ $ $ surd $ Hz。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Dead-Zone-Free Optically Pumped Magnetometer With Small Heading Error

An optically pumped magnetometer (OPM) is presented which is dedicated to sensitive measurements on mobile platforms within the Earth’s magnetic field. It features omnidirectional sensitivity based on amplitude-modulated optical pumping of two cesium vapor cells in perpendicular arrangement. The sensor’s heading error is remarkably suppressed in a differential scheme using two well-balanced circularly polarized laser beams of opposite helicity for each of the cells. In addition, a modulation of the spin-driving frequency eliminates potential systematic errors in sensor read-out due to demodulation phase shifts and instabilities. Within shielded environment, we demonstrate the omnidirectional sensing characteristics, on average a maximum heading error of 0.4 nT for arbitrary sensor orientation, and a noise-limited magnetic flux density resolution of 1.8 pT/

$\surd $

Hz within a sensor 3-dB bandwidth of 1 kHz.

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来源期刊

IEEE Sensors Journal 工程技术-工程：电子与电气

CiteScore

7.70

自引率

14.00%

发文量

2058

审稿时长

5.2 months

期刊介绍： The fields of interest of the IEEE Sensors Journal are the theory, design , fabrication, manufacturing and applications of devices for sensing and transducing physical, chemical and biological phenomena, with emphasis on the electronics and physics aspect of sensors and integrated sensors-actuators. IEEE Sensors Journal deals with the following: -Sensor Phenomenology, Modelling, and Evaluation -Sensor Materials, Processing, and Fabrication -Chemical and Gas Sensors -Microfluidics and Biosensors -Optical Sensors -Physical Sensors: Temperature, Mechanical, Magnetic, and others -Acoustic and Ultrasonic Sensors -Sensor Packaging -Sensor Networks -Sensor Applications -Sensor Systems: Signals, Processing, and Interfaces -Actuators and Sensor Power Systems -Sensor Signal Processing for high precision and stability (amplification, filtering, linearization, modulation/demodulation) and under harsh conditions (EMC, radiation, humidity, temperature); energy consumption/harvesting -Sensor Data Processing (soft computing with sensor data, e.g., pattern recognition, machine learning, evolutionary computation; sensor data fusion, processing of wave e.g., electromagnetic and acoustic; and non-wave, e.g., chemical, gravity, particle, thermal, radiative and non-radiative sensor data, detection, estimation and classification based on sensor data) -Sensors in Industrial Practice