基于单片机的直流电机速系统毕业论文.doc

基于单片机的直流电机测速系统 摘要目前科研生产中采用的速度测量方法可分为两类；直接测量法和间接测量法两大类。直接测量法是通过某种测量原理或效应直接获得速度量, 如多普勒测速仪、空间滤波测速等。这种方法的最大优点是反应快、可测量瞬时速度，但设备成本高，且受到大气物理环境的限制。间接测量法是测量目标的移动距离和时间, 通过计算得到速度量, 如光电测速、光栅测速、磁栅测速和图像测速等，用于测量小型弹丸的天幕法和光幕法测速系统、用于车辆测速的激光测速仪，以及用于生产流水线上的光电脉冲测速方法等等 Abstract The rotate speed is one of the important parameters for the engine, and it is also the important factor that calculates other parameters. At present there are many methods for the tachometric survey measurement. After analyze various rotate speed measurement methods, the photoelectric sensor tachometric survey system is presented. The composition and the principle of the system are presented, and the design method of hardware and the software are also presented. The whole system has the bigger promotion application value. Speeds measurements are usually several ： electric sensors optional lesson, speed sensor Magnetic and electric speed sensor source, there is a source Magnetic and electric speed sensor, etc. Specific needs, then what kind of sensor based on measurements of the speed required. For example, at the measuring whether we need to detect zero speed, high speed of the highest speeds, the device speed. the device speed has the following ： with standard line is getting on the m1 (～ m5) for speed has in turn, hinges on one tank The speed of scientific research in the measurement can be divided into two types of direct and indirect ； the the two categories. A direct measurement method is through a direct measurement of principle or effect, such as to speed the Doppler, space based on zero speed, etc. this method of the greatest advantage is responsive to the transient and equipment costs are high, and the physical environment. remote measurement method is to measure the distance and time through calculation, such as test speed display, light, speed, which the grille zero speed, and images, speed, for measuring small sky law of the law and light Key words：single-chip computer，photoelectric sensor，rotate speed