光伏发电系统三相逆变并网及其仿真研究

Proteus画的51单片机超声测距并仿真。(Proteus carry out the ultrasonic measure distance circuit using 51SOC and simulate。)

256级灰度屏leyard2000驱动芯片滚动字幕带时钟(STM32+3.5固件库)(Marquee 256 grayscale screen leyard2000 driver chip with a clock (the STM32 3.5 firmware library))

本项目是基于Cortex-M3 的地沟油快速检测装置，旨在实现“地沟油”快速，现场检测。MCU控制可编程的直接数字频率合成器（DDS）产生正弦激励信号，经过可变增益放大器（VGA）和低通滤波器（LPF）作用于食用油阻抗传感器（实验室制作）信号经过仪器放大器送入微控制器（MCU）的模数转化（ADC）通道，MCU对采集的信号通过快速傅里叶变换（DFT）处理，实现食用油阻抗与相角的检测；USB和以太网接口，可与计算机通讯，以便对采集的数据进行存储和分析。(The project is based on the Cortex-M3 waste oil rapid detection device designed to achieve " waste oil" rapid, on-site testing. MCU control programmable direct digital frequency synthesizer (DDS) generates sinusoidal excitation signal through a variable gain amplifier (VGA) and a low-pass filter (LPF) acting on the oil-impedance sensor (lab produced) to send signals through the instrumentation amplifier into the microcontroller (MCU) modulo conversion (ADC) channels, MCU signal acquisition via Fast Fourier Transform (DFT) processing, oil resistance and phase angle detection USB and Ethernet interfaces, and computer communication, in order to collect data for storage and analysis.)

用单片机设计超级万年历，该万年历即使掉电也能够实时显示时间(Single-chip design super calendar, the calendar even with power real-time display)

应用51单片机控制蜂鸣器产生不同的频率，而形成曲调。(Application of 51 single chip microcomputer control buzzer to generate different frequencies, and the formation of the tunes.)

51单片机门禁系统程序，门口管理机程序,RS485通信，门禁卡开关门.(51 microcontroller program entrance guard system, the management machine program, RS485 communication, entrance card open to close.)

经典的电力系统风险评估教材，适合电力专业的老师，学生，非常不错(Classic power system risk assessment materials, suitable for the power of professional teachers, students, very good)

说明：  定时器3为主输出pwm 定时器2为从对输出脉冲进行计数 主从计数(PWM timer master slave count timer 3 is the main output PWM timer 2 is counted from the output pulse.)

多无人机（Unmanned Aerial Vehicle，UAV）协同目标跟踪在军/民用方面有 着广泛而又迫切的应用需求和重要的理论研究价值，是目前多 UAV 系统自主控制 领域的一个重要研究方向。本文以 UAV 执行对地侦察打击任务为应用背景，针对 复杂环境中多 UAV 协作式跟踪地面移动目标问题，重点围绕目标状态融合估计和 观测航迹优化两项关键内容展开研究(Multi-UAV (Unmanned Aerial Vehicle, UAV) has a broad and collaborative target tracking application needs urgent and important theoretical research value in the military/civilian, is the multi-UAV system with independent control area is an important research direction. In this paper, ground reconnaissance UAV to perform combat tasks as application background, moving target problem for the complex multi-UAV collaborative environment to track the ground, the focus on integration of the target state estimation and optimization of the two key elements of the observed track a study)

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