利用单片机实现的红外通信接口

介绍了一种利用单片机实现红外通信接口的方法,只需在外部搭少量电路,就可实现单片机系统的红外通信。     

基于AT89S51的交通灯控制系统设计与实现

针对目前繁忙的交通路口，设计具有调整各车流方向的通行时间、有数码管倒计时显示、以及紧急模式的交通灯控制装置。经测试，该系统运行稳定、使用方便、误差小、造价低，能有效地提高交通路口车辆通行效率。     

汽车制动灯控制器设计与仿真

本控制器以STC89C51RC微控制器核心,采用Proteus和Keil C51进行硬件电路设计和软件设计、C51编程,开发了一款高性价比的新能源汽车制动灯控制器,并在Proetus环境中进行了软、硬件联合仿真、测试与验证。     

基于51单片机的驼峰轨道电路电流测试系统

设计一种采用51单片机和ADC0809构成的驼峰直流2.3轨道电路电流测试系统,该系统能够测量多路的直流电流量,通过数码管本地显示测试数据。也可经串口向PC机传递测试数据。     

基于MCS-51单片机的高速公路收费键盘的设计

本论文介绍了一种利用MCS-51单片机为高速公路收费系统设计专用键盘的方法。此设计以单片机为控制电路的核心构成了行列式键盘,并采用程序扫描法识别按下的键,通过MCS-51单片机的串行口和PC机的串行口进行通信。     

ECE R51新试验方法与GB 1495-2002的对比研究

文中详细阐述了ECE R51中涉及汽车加速行驶车外噪声的新试验方法(方法B)与现行国家强制性标准GB 1495-2002在测试方法和噪声限值方面的技术差异,并在此基础上预测了国标的修订方向。     

用查表法实现微处理器的快速CRC计算

简要分析了CRC算法实现的基本原理，在此基础上，提出了两种用查表方式来提高微处理器进行CRC编码速度的算法，两种方法分别对应于不同的微控制器硬件环境和传输速度，最后给出了一种算法的C语言程序的主要部分。     

Experiences with Competitive Tendering of Bus Services in Germany

Abstract

After a long transition period with only a few isolated procedures for competitive tendering, the market for German public transport bus services has seen numerous such tenders in recent years. The results are complex. From the public transport authorities’ point of view, the main effects are a decrease in subsidy payments, with relatively low expenses relating to the tendering process (allocation, contract management). The overall level of competition is high, with five to seven bidders on average, although this has been declining in recent years. Entry barriers have been identified at significant levels for several parameters, especially with respect to the volume tendered and the revenue risk to be borne by the operator out of net‐cost contracts. Demonstrably small‐ and medium‐sized transport operators have been able to increase their market share in the starting phase of introducing tendering, with diminishing success rates in recent years. Due to the increased quality requirements in competitive tendering, the quality of public transport available has improved considerably, and environmental standards have been better implemented and sustained. As far as employees are concerned, a trend towards wages below the wage rate of private operators cannot be observed. However, their level is well below the level of public incumbent operators.     

基于GSM的汽车空调远程控制系统设计

通过对汽车空调控制系统特点的分析,提出以STC89C51单片机为控制核心,通过GSM网络对汽车空调系统进行短消息远程控制的思路.并依据此思路完成系统相应硬件和软件设计.该系统操作简单、成本低廉,而且不受距离和障碍物的影响,对于提高汽车的舒适性有很大的实用价值.     

基于51单片机的CAN总线转串口通信卡的设计与实现

针对舰船设备间通信,设计一种以51单片机为核心的CAN总线和RS-422串口的适配卡。对比分析了CAN总线和RS-422串口的通信特点,介绍了板卡硬件电路设计,并对软件的设计思路与流程做了详尽描述,并附相关代码。系统可靠性高,实时性好。