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发明公开
CN105203971A 一种磁强计 无效 - 撤回

一种磁强计
摘要：
本发明公开了一种磁强计，是一种基于数字频率合成器的大范围磁强计，由数字频率合成器，放大器，带通滤波器和磁通门敏感元件，低噪声放大器，信号调整电路，几个部分组成。本发明所介绍的磁通门磁强计，优点表现在结构简单、探头性能好、基波分量少、灵敏度高及稳定性能好，优化了磁通门磁强计传感器和信号处理电路，提高了磁场模拟信号输出的信噪比，增加了测量范围，并且提高了磁通门传感器的测量精度。经测试，优化后的磁通门磁强计可以实现在±65000nT范围内探测带宽可以达到10Hz，RMS可以达到0.1nT。
摘要（英）：

The invention discloses a magnetometer which is a wide-range magnetometer based on a digital frequency synthesizer. The magnetometer is composed of the digital frequency synthesizer, an amplifier, a band-pass filter, a flux-gate sensitive element, a low-noise amplifier and a signal regulating circuit. The flux-gate magnetometer has the advantages that the structure is simple, probe performance is good, fundamental components are few, sensitivity is high, stability is good, a flux-gate magnetometer sensor and a signal processing circuit are optimized, the signal to noise ratio of magnetic field analog signal output is raised, the measuring range is widened, and the measuring accuracy of the flux-gate sensor is improved. It is proved by tests that the detection bandwidth of the optimized flux-gate magnetometer can reach 10 Hz within the range of +/-65000 nT, and the RMS can reach 0.1 nT.

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