This paper designs a gear rotational speed sensor consisting of a permanent magnet and a FeCoSiB/Pb(Zr,Ti)O₃ magnetoelectric composite as a magnetic sensor. The influences of distances between the detection gear, FeCoSiB/Pb(Zr,Ti)O₃ composite, and the permanent magnet on output voltage are investigated in detail. In order to achieve a larger output voltage, the FeCoSiB/Pb(Zr,Ti)O₃ composite should be closer to the gear. The results show that the proposed sensor has good near-linear to detect rotational speed. When the frequency is the output parameter, the sensitivity of the proposed sensor to speed is determined to be 0.9951 in the range of 10–600 rpm. Furthermore, based on the magnitude of output voltage, the voltage detection sensitivity of the proposed sensor to gear speed is determined to be ~ 1.15 mV/rpm in the range of 10–150 rpm. The research indicates that the magnetoelectric composite has physical feasibility and great potential application prospect in the field of gear speed measurement.

本文设计了一种由永磁体和FeCoSiB / Pb（Zr，Ti）O ₃磁电复合材料组成的齿轮转速传感器作为磁传感器。详细研究了检测齿轮，FeCoSiB / Pb（Zr，Ti）O ₃复合材料与永磁体之间的距离对输出电压的影响。为了获得更大的输出电压，FeCoSiB / Pb（Zr，Ti）O ₃复合材料应该更靠近齿轮。结果表明，提出的传感器具有良好的近线性检测转速。当频率为输出参数时，建议的传感器对速度的敏感度在10–600 rpm范围内确定为0.9951。此外，根据输出电压的大小，建议的传感器对齿轮速度的电压检测灵敏度确定为〜1.15 mV / rpm，范围为10–150 rpm。研究表明，磁电复合材料在齿轮转速测量领域具有物理可行性，具有广阔的应用前景。