基于PIC单片机的简易智能小车的设计

以PIC单片机为控制核心,使用多种传感模块进行检测的智能小车设计方法,实现了小车自动寻迹、障碍物避让和非平整路面自动寻找水平点等功能。实验结果表明,该智能小车具有很好的识别与检测的能力,具有定位精度、运行稳定可靠的特点。     

高温恶劣环境下基于PIC单片机的直流电机控制系统

介绍一种采用TLE5205专用直流电机控制芯片的智能PIC单片机直流电机控制系统.使用具有实时时钟的温度传感器DS1629,以对预定事件和外部突发事件采取必要反应.该系统具有智能化、小型化、网络化等特点,在高温恶劣环境下有广泛的应用.     

Interference cancellation scheme for uplink cognitive radio systems

This paper investigates the interference cancellation (IC) scheme for uplink cognitive radio systems, using the spectrum underlay strategy where the primary users (PUs) and the secondary users (SUs) coexist and operate in the same spectrum. Joint MMSE-based parallel interference cancellation (PIC) and Turbo decoding scheme is proposed to reduce the interference to the PUs, as well as to the SUs, in which the minimum mean square estimation (MMSE) filter is only employed in the first iteration, regarded as the “weakest link” of the whole detection process, to improve the quality of the preliminary detections results before they are fed to the Turbo decoder. Simulation results show that the proposed scheme can efficiently eliminate the interference to the PUs, as well as to the SUs.     

直流电子负载的设计

以PIC16C716低功耗单片机为核心设计了可以在恒压和恒流两种模式下工作的直流电子负载.通过功率控制,在恒流模式下,流过负载的电流恒定不变,且电流值可以设定;在恒压模式下,加在负载上的电压恒定不变,且电压值可以设定.系统可以显示电压电流参数,测量误差在0.5%以内.     

基于单片机PIC16F87的大功率智能充电机设计

利用马斯三定律作为理论基础,设计了一款以大功率开关电源作为充电电源,以单片机为控制核心的多功能通用型智能充电机．提出了一种三段式脉冲快速充电的新方法．该方法不仅能显著提高充电速度,还能有效实现去极化．实际使用表明该充电机充电效率高,能有效延长电池使用寿命．     

两相步进电机的双极细分驱动及Proteus仿真

从软件仿真的角度,论述了两相步进电机的双极细分驱动原理,给出了细分驱动的波形、C语言编程方法及其Protues仿真结果。     

基于单片机的油井实时监测系统设计与实现

介绍了一种基于单片机PIC16F877的油井实时监测系统。该系统能够分时采样获取油井下电动潜油泵的两路压力、两路温度、漏电流和振动参数,并利用其内部的ADC转换器将模拟信号进行量化处理转换为数字信号。为了保证采集信号的精确度,系统采用去极值求平均值滤波算法对采集到的数字信号量进行滤波处理,最终将油井下实时信息显示到主界面上,同时具有报警功能。实验结果表明,本系统对井下各信息的采集具有高精确度和实时性,并取得了较满意的控制效果。     

The Moore＇s Law for photonic integrated circuits

We formulate a ＂Moore＇s law＂ for photonic integrated circuits （PICs） and their spatial integration density using two methods. One is decomposing the integrated photonics devices of diverse types into equivalent basic elements, which makes a comparison with the generic elements of electronic integrated circuits more meaningful. The other is making a complex component equivalent to a series of basic elements of the same functionality, which is used to calculate the integration density for functional components realized with different structures. The results serve as a benchmark of the evolution of PICs and we can conclude that the density of integration measured in this way roughly increases by a factor of 2 per year. The prospects for a continued increase of spatial integration density are discussed.     

PIC微控制器并行从动端口应用技术研究

研究了PIC微控制器并行从动端口内部结构、读,写操作时序及应用开发技术,编写了基于HI—TECHPICC的微控制器C程序,在所设计的双机并行从动端口通信测试电路上进行了双向通信测试,实现了高速数据传输。     

甲烷催化测量系统的硬件设计

文章主要从硬件方面介绍了以集成CAN总线控制器的美国Microchip推出的8位单片机PIC18F4580为核心,由甲烷检测桥路、CAN总线通信电路、信号放大电路、开关量输出电路、AD参考电压电路及显示电路等构建的甲烷催化测量系统的设计。