电动机转速测定及数据显示系统设计毕业设计.docVIP

摘 要 在电子时代的今天，电动机在工农业生产和人们的日常生活中起着非常重要的作用。直流电机是最常见的一种电机，具有优良的机械性能，调速范围宽，起动性能好等优点，控制电路简单，所以在社会各个领域中得到广泛应用。在工程实践中，经常会遇到各种需要测量转速的场合，转速测量方法模拟和数。模拟测速发电机的检测元件，信号是模拟量。数字通常采用光电编码器，霍尔和其他成分的检测元件，该信号是一个脉冲信号。随着计算机的广泛应用，特别是高性能价格比的单片机的出现，测量速度通常是采用以单片机为核心的数字测量方法。本设计以单片机为核心设计了电机转速测量和数据显示系统，要求速度范围在0 -300r /min的直流电机和交流变频调速电机的转速测量和显示，数据显示精度达到，具有，限报警。，将霍尔传感器产生的脉冲信号输入到单片机外部中断0，单片机的内部定时器模式0，周期信号进行计数，计算公式计算速度。，部分显示，显示的范围在0-300r /min。Abstract In the electronic age today, electric motors in the industrial and agricultural production and peoples daily life plays a very important role. DC motor is the most common one kind of electrical machinery, has excellent mechanical performance, wide range of speed, starting the advantages of good performance, simple control circuit, so in all social fields has been widely used. In engineering practice, often meet various needs of occasions measuring the rotation speed, speed measurement method of simulation measurement and digital measurement of two. Analog tacho generator detecting element, signal is analog quantity. Digital measurement usually uses photoelectric coder, Holzer and other components of the detection element, the signal is a pulse signal. With the wide application of the computer, especially the high ratio of performance to price the appearance of single chip microcomputer, measuring speed is usually used to MCU as the core of digital measuring method. The design of single-chip microcomputer as the core design of the motor speed measurement and data display system, the speed in the range of 0- 3000r / min DC motor and AC motor variable frequency speed regulating motor speed measurement and display, data display accuracy of a digit, has, the lower limit alarm. The design of 5V DC motor, will Holzer sensor generates a pulse signal input to the microcontroller external interrupt 0export, SCM internal timer mode 0, the periodic signals are counted, calling the computation speed. Call display program in LED, its main content is a single part