characters-and-Unicode

进行平滑滤波编码分析得到接近真实值的参数(Smooth filtering to solve the problem of unstable sampling value after single sampling)

基于STM32F407的超声波模块测距，增量式编码器（1/30减速比）实时测速，PWM输出控制直流单机，并通过OLED显示实时数据，同时也通过串口打印(Based on STM32F407 ultrasonic module ranging, incremental encoder (1/30 deceleration ratio) real-time speed measurement, PWM output control DC single machine, and display real-time data through OLED, but also through serial port printing.)

PLC工控泵控制流程图，PLC学习资料...(The flow chart of PLC industrial control pump control, PLC learning materials)

说明：  针对MCS-51单片机的硬件结构和原理、指令系统、汇编、中断、定时器、并行扩展等进行了讲解。(The hardware structure and principle, instruction system, assembly, interrupt, timer and parallel expansion of MCS-51 single chip computer are explained.)

通过反转法循环扫描矩阵键盘，并通过数码管显示数据(By inversion method cyclic scan matrix keyboard, and through the digital display data)

分别控制四路电机转动，转速以正弦规律变化。与计算机进行串口通信，可用串口控制转速，位置控制。(The rotational speed of the four motor is controlled by the sine law. Serial communication with the computer, using serial port to control the speed, position control.)

说明：  在正点原子得库中改的，原子的例子是stm32f407zet6，我把它改成在stm32f407vgt6上运行。可以驱动9488液晶屏，使用的是16位fsmc。(The atom example is stm32f407zet6, which I changed to run on stm32f407vgt6. It can drive 9488 LCD screen, using 16 bit FSMC.)

单片机脉冲计数程序，可计算输入脉冲值及误差值，串口写入读出通信。(Single-chip pulse-counting procedure, computable input pulse value and error value, and serial write to read out the communication.)

步进电机是将电脉冲信号转变为角位移或线位移的开环控制电机，是现代数字程序控制系统中的主要执行元件，应用极为广泛。。在非超载的情况下，电机的转速、停止的位置只取决于脉冲信号的频率和脉冲数，而不受负载变化的影响，当步进驱动器接收到一个脉冲信号，它就驱动步进电机按设定的方向转动一个固定的角度，称为“步距角”，它的旋转是以固定的角度一步一步运行的。可以通过控制脉冲个数来控制角位移量，从而达到准确定位的目的；同时可以通过控制脉冲频率来控制电机转动的速度和加速度，从而达到调速的目的。(Stepper motor is an open loop control motor which transforms electrical pulse signal into angular displacement or linear displacement. It is the main executive element in modern digital control system, and is widely applied. In the case of non overloaded, the motor speed and stop position depends only on the pulse frequency and pulse number, regardless of load changes, when the stepper driver receives a pulse signal, it drives stepper motor to set the direction of rotation of a fixed angle, called "step", it is the rotation of the fixed point of the operation step by step. We can control the angular displacement by controlling the number of pulses, so as to achieve the goal of accurate positioning. At the same time, we can control the speed and acceleration of motor rotation by controlling the pulse frequency, so as to achieve the purpose of speed regulation.)

矢量电机控制器，永磁同步电机，无刷直流电机，无感控制(Vector motor controller, permanent magnet synchronous motor, brushless DC motor, sensorless control)