无源磁脉冲转速传感器设计 毕业设计.doc

无源磁脉冲转速传感器 摘 要 无源磁脉冲转速传感器作为感知速度的触角，可在无源感知被测对象的信息，按一定规律变换成为电信号或其他所需形式的信息输出，以满足信息的传输、处理、存储、显示、记录和控制等要求磁电式转速传感器，电磁感应原理实现测速周期性测出 本课题设计的脉冲输出式转速传感器的新颖之处在于：（1）内置信号整形电路，可直接输出大幅值脉冲信号，具有很强的抗干扰性能；（2）采用无源设计技术，无需外部供电。因此，相信该产品将具有很好的市场前景。 关 键 词：  PULSE-OUTPUT SPEED SENSOR ABSTRACT Speed sensor is the antenna of sensing speed. It can perceive the motion information of measured object, and convert the information to electrical signals or other information to meet the requests of transmission, processing, storage, display, record and control. So it is widely used in mechanical, chemical, transportation, automatic control, military, automotive ABS, wheel speed and engine speed control. Pulse-output speed sensor is a magnetic-electric speed sensor, based on the principle of electromagnetic induction to achieve the velocity measurement. When measured object gear or gear plate rotates, the magnetic field and magnetic flux inside the sensors will change, which can induce electromotive force inside the sensor coils. The induced voltage signal is output in pulse form. By handling the pulse signal, the speed of measured object can be got. This paper discusses the working principle and system design of the pulse-output speed sensor in detail. The design includes the overall design, circuit design, structural design, preparation process, signal conditioning circuit design, the simulation analysis and parameter optimization by Ansoft and so on. Based on the above research, three prototypes been processed. Pulse output speed sensor has two novelties: (1) Built-in signal shaping circuit can be directly output large magnitude pulse signal, which improves the anti-interference performance; (2) The passive design leads to no need for an external power supply. Therefore, the product must be of sunshine market prospects. KEY WORDS：sensor, pulse, speed, magnetic circuit 目 录前 言 1 第1章 无源磁脉冲转速传感器的测量原理 5 §1.1 前 言 人体为从外界获取信息，必须借助于感觉器官，但是单靠人们自身的感觉器官，在研究自然现象和规律以及生产活动中它们的功能就远远不够了。为适应这种情况，就需要传感器。可以毫不夸张地说，