基于Mega169的空调控制器的设计

采用单片机技术,设计了一种车用空调控制器.控制器可对空调的各个部件进行控制,实现制冷制热、调整风量及控制风口的变换等操作.系统采用液晶显示屏显示,由程序控制实现各个环节的功能,方便了汽车驾驶员的操作.该设计具有很高的实用价值,可适用于现有的大多数汽车以及工程车.     

基于EasyARM1138的电能收集充电器设计

设计了基于EasyARM1138嵌入式处理器为控制核心的电能收集充电器,阐述了电能收集器的硬件电路结构、工作原理及软件程序设计.根据充电电池取样电流与电压状态信息,EasyARM1138产生合适的PWM信号,并控制BUCK变换器工作,实现充电高效控制.本电能收集充电器具有数字化、智能化的特点.     

接触网测试仪显示设计

中铁路接触网测试仪是基于TI公司的TMS320F2812数字信号处理芯片的检测系统。结合F2812本身强大的功能,搭配松下公司生产的型号为LTM024D250的液晶,提供实现检测系统的实时工作状态显示——采样数据、波形、设备号等,给现场检测人员提供直观的显示。     

基于Micro2440视觉处理平台的构建

采用Micro2440开发板和OV9650摄像头,成功获取了视频图像,并且能够对视频中的每一帧图像同步进行自定义的图像处理,其处理的结果同时能够在LCD上予以显示.实验结果证明该视觉处理平台具有良好的视觉处理特性,适合作为数字图像处理平台,为进一步的图像处理、功能扩展以及嵌入式应用创造了条件.     

基于单片机的开关电源检测系统的研制

根据某军用雷达所用开关电源的要求,设计了一种安全可靠的开关电源检测系统。分别介绍了各个外部扩展模块的电路以及主要模块的驱动程序,最后分析了系统实时操作的实现,讨论了系统的资源分配,提出了驱动程序和操作系统的优化方案。该检测系统充分利用LCD附带的存储器,实现了缓存机制,提高了工作的安全性和实时性。投产后的使用表明,该检测系统运行稳定可靠。     

基于LPC1100的温度检测网络节点设计

基于NXP公司LPC1100系列处理器设计了一种温度检测网络节点。介绍了网络系统的整个设计方案和温度检测网络节点的硬件设计,并给出功耗管理、温度传感器和ZigBee三个软件模块的具体软件设计方法。     

Frictional properties of VA‐mode alignment‐film surfaces studied by frictional force microscopy

Abstract— The surface‐friction characteristics of the post‐bake temperature were compared to that of the rubbing condition on VA‐mode alignment films (AFs) using frictional force microscopy (FFM). The surface roughness and the surface frictional force increased when the temperature was elevated. However, the frictional asymmetry could not be detected by the frictional loop due to the instability of the side‐chain molecular arrangement. For the inter‐influences of the total friction and surface roughness, the density of the side chain was changed and it was intentionally rubbed for evaluation. The results showed that the total friction was higher when the rubbing was stronger and side‐chain density lower, and the surface roughness also increased in the same manner. This can be explained by the potential interaction due to the curved structure of the side‐chain surface that establishes the probe that is scanned and the top surface layer. In order to confirm the influence of the pre‐tilt angle on the tilt of the side chain, a test cell was produced under the same conditions and evaluated. The results showed that the pre‐tilt‐angle decreased according to the difference in density of the side chain and strength of rubbing after injecting liquid‐crystal (LC).     

Reduced cross‐talk in shutter‐glass‐based stereoscopic LCD

Abstract— It is expected that 3‐D will be the next step in the enhanced viewing experience. At present, there are two competing 3‐D technologies for glasses‐based consumer TVs: active shutter glasses and passive polarized glasses. With the ongoing reduction in response time of liquid‐crystal displays (LCDs), this article will focus on shutter‐glass‐based stereoscopic LCDs. In this paper, the properties of such a display system is described and it is demonstrated that by adding a line‐scanning backlight, the cross‐talk can be reduced to less than 1.4%, allowing for excellent 3‐D portrayal. For images of extreme contrast, this is perceivable, but not judged annoying by a panel of expert viewers. Which characteristics of the display and shutter glasses that should be optimized to create an inexpensive, cross‐talk‐free, 3‐D LCD are discussed.     

Measuring the degree of eyestrain caused by watching LCD and PDP devices

In this paper, we propose a new way of measuring the degree of eyestrain caused by watching LCD (Liquid Crystal Display) and PDP (Plasma Display Panel) devices. In the experiments, we used a head-mounted eye capturing device and an illumination setup that was designed to avoid specular reflections caused by glasses or contact lenses. Using the captured eye images, we analyzed the eye blinking and changes of pupil sizes (pupil accommodation), using a real-time image processing algorithm. Then we analyzed the degree of eyestrain based on the calculated blinking rate and the pupil accommodation speed. The proposed method offers five improvements over previous methods. First, we perform a comparative analysis of LCD and PDP devices based on the degree of eyestrain. Second, to analyze the degree of eyestrain, we use quantitative data such as the blinking rate and the pupil accommodation speed. Third, we measure the accurate eye blinking and changes of pupil sizes by using high-resolution and zoomed eye image sequences. Fourth, since the camera and illuminative system are based on a specular reflective model, the proposed method can be used with subjects that wear glasses or contact lenses. Fifth, the proposed method is performed at real-time speed.Experimental results showed that the degree of eyestrain when watching LCD devices was greater than that when watching PDP devices.

Relevance to industry

In the large display industry, LCD and PDP devices have become more and more prevalent. In the past, LCD devices have been compared to PDP devices in terms of factors such as spatial resolution, brightness, contrast levels, etc. To perform more accurate comparisons based on human factor, we are proposing a new way of comparing LCD to PDP devices based on the degree of eyestrain.     

虚拟LCD显示模块的设计

通过在BTF020单片机的RAM中建立缓冲区数组并对虚拟LCD的显示数据进行存储,然后通过单片机的串口将该数据传送给PC机,再用VB6.0语言对这些数据进行处理并构建虚拟LCD的界面,使其能够正确显示字符或者图形。实验结果表明,所建的虚拟LCD显示模块具有开发简便、快速、通用性强的特点。