【摘要】 与传统的磁敏传感器比较,巨磁阻传感器具有灵敏度高、可靠性好、测量范围宽、体积小、价格低等优点。介绍了巨磁阻传感器的工作原理和输出特性。以巨磁阻传感器为磁敏元件,以单片机为控制核心设计了高精度电机转速测量方法。分析了测量系统工作原理、各硬件部分功能。实验结果表明,采用巨磁阻传感器的转速测量系统具有准确度高、测量范围宽、测量间距大等优点。更多还原

【Abstract】 Compared with conventional sensors,giant magneto resistive(GMR) sensor has the advantage of high sensitivity,high reliability,wide measurement range,small volume and low price.Principle of GMR sensor and its output characteristics are presented.A method of motor speed measuring accurately based on GMR is designed.Single chip processor is the core in the system.The working principle of the measuring system and the function of the hardware are analyzed.The experiment result shows that the measuring system with GMR sensor has the advantage of high accuracy,wide measurement range,and distant measurement.更多还原