基于多功能触笔的PC触摸屏系统

介绍一种触笔上有按键和滚轮的计算机触摸屏系统的组成原理和工作方法.该系统通过触笔的笔尖碰触触摸屏的触摸板来确定电脑鼠标指针移动的位置.通过按下、抬起触笔上的按键或滚动触笔上的滚轮以实现与电脑鼠标的按键和滚轮相同的功能,实现对传统电脑鼠标的模拟和完全替代.系统在人机交互设备与系统技术领域具有新颖性、创造性和实用性,填补了...     

A ‘locate-and-select’ touch screen

A touch screen has been developed which senses finger position by the obstruction of a network of infra-red beams passing in front of the screen. As this system does not use touch sensing per se, it becomes possible to introduce a second level of activation based on finger pressure. The major attraction of the proposed scheme is that it allows the desired item to be located before it is selected; feedback is provided to confirm the location. In addition, the response of the terminal to the selection can be programmed to simplify the driving software, and to provide compatibility with conventional terminals.     

非接触式触摸屏系统的设计

针对目前触摸屏必须接触式控制的缺陷,提出了一种基于图像处理技术的新型触摸屏系统。该系统以微软VX—6000USB2.0摄像头为图像传感器,由PC机采集图像序列,识别和跟踪定位激光光斑,并对用户的指点控制信息做出相应反应。阐述了该系统结构及定位原理,使用基于OpenCV（open source computer vision library）的图像处理算法辅助开发其软件系统。提出一种基于边界修复的图像二次校正法,通过对训练样本的测量发现,系统拥有很好的指点精度。实验结果表明,所设计触摸屏系统能够初步实现非接触式指点的要求,为大屏幕挂壁式非接触式触摸屏系统的研究提供了有效的思路。     

触摸屏在随动系统中的应用

介绍一种基于触摸屏的单片机伺服系统.从触摸屏取得跟随目标位置的电压模拟量,经过A/D转换芯片将其处理成数字量,输入单片机系统进行数字处理,经过D/A转换芯片将处理的结果输出,控制马达和继电器动作,使系统的输出能跟随目标的位置,同时将目标位置的坐标显示在LCD上.仿真的结果证明了系统所用方法的正确性.     

嵌入式Linux中对触摸屏驱动的设计

触摸屏设备需要经过特定的硬件与软件驱动处理后才能够进行连续和稳定的工作.详细介绍了一种用arm9处理器s3c2410和驱动芯片ADS7846构成的触摸屏控制系统.给出了具体的连接方法和工作原理,并在嵌入式Linux系统中,根据SPI的工作时序分析和设计了关键部分的驱动程序.实践证明该方案对输入操作具有响应迅速、采样精确的优点.     

A tangible information explorer using vibratory touch screen

Various kinds of touch panel displays are becoming readily available for implementing futuristic human computer interaction (HCI) methods and are proven to be a useful infrastructure for inventing intuitive HCI environments. In spite of their popularity, there are some drawbacks. The most serious one is their hardness to operate especially for the weak in information technology such as elderly and blind users. A tactile feedback function has a potential ability for enabling them to make full use of the devices. We propose an approach for effectively designing user-friendly HCI environments based on the tactile feedback. We exemplify our approach through the design and development of a practical application, a haptic web browsing system. It allows even the weak users to intuitively explore various web pages without heavily depending on the visual information. While the system targets at supporting the weak, the touch interactions are quite useful means for general users to improve the stability and the degree of satisfaction in web browsing operations. The proposed system uses a touch panel haptic display for helping the users to operate with intuitive touch sensations.     

Enhanced auditory feedback for Korean touch screen keyboards

With the increasing popularity of touch screen mobile devices, improving the usability and the user experience while inputting text on these devices is becoming increasingly important. Most conventional touch screen keyboards on mobile devices rely heavily on visual feedback, while auditory feedback seldom includes any useful information about what is being inputted by the user. The auditory feedback usually simply replicates the sounds produced by a physical keyboard. This paper describes the development of an enhanced auditory feedback mechanism for a Korean touch screen keyboard called the enhanced auditory feedback (EAF) mechanism. EAF has subtle phonetic auditory feedback generated using the acoustic phonetic features of human speech. While typing with EAF, users can acquire non-invasive auditory clues about the keys pressed. In this work, we compare conventional auditory feedback for a touch screen keyboard used in touch screen mobile devices with that of EAF and explore the possibility of using enhanced auditory feedback for touch screen keyboards.     

一种触摸屏数据采集系统的设计

触摸屏作为人机交互的主流方式之一,具有十分重要的研究价值,其中重要方向之一是自电容式触摸屏的研制.但目前自电容式触摸屏数据采集电路的电容通道数量最多只有13个,严重限制了 自电容式触摸屏研制过程中触摸点数量的拓展.针对触摸屏数据采集电路电容通道数量少的问题,设计了一种由Arduino控制的触摸屏数据采集系统,包括硬件和...     

一维图像识别实现虚拟触摸屏系统

为避免大屏幕触摸屏中人体遮挡无法识别手指的问题设计了一种虚拟触摸屏系统,由至少两个一维图像采集装置、显示屏和数据处理装置构成。一维图像采集装置可以是一维线性传感器,配合镜头、信号转换和接口电路实现;也可以是市场上易于购得的二维图像采集装置摄像头,使用其一维图像数据。由一维图像采集装置采集手指在虚拟触摸屏上的一维图像数据,根据多个一维坐标点位置与二维虚拟触摸屏上点位置的一一对应关系,由数据处理装置将其转换为手指触摸屏幕上的二维直角坐标,从而完成对应的操作,实现人机交互。     

PLC和触摸屏在金相切割机中的应用

本文以金相切割机控制系统的改造为例,介绍了控制系统的组成.在系统改造中,以PLC作为控制系统的核心,以触摸屏作为人机界面简单直观,易于操作.并着重介绍了PLC和触摸屏的硬件和软件设计.系统试用表明PLC的使用提高了控制系统的稳定性和抗干扰能力,触摸屏的使用减少了大量的硬件设施以及由此带来的故障.     

基于PLC和触摸屏的等离子体清洗系统

以西门子S7-200PLC和TP170B触摸屏为主要控制元件,实现自动等离子体清洗系统的综合控制和管理。本文详细的阐述了此系统的硬件组成和软件设计。     

AVR+触摸屏技术Atmel克敌致胜之良方

<正>触摸屏诞生于1970年,是一项由Elo TouchSystems公司首先推广到市场的技术,是一种与电脑或其他电子产品最简单、最直接的交互方法。近年来,从iPhone及iTouch的广泛应用,到现如今iPad的风靡全     

基于目标跟踪的红外触摸屏优化算法

针对现有红外触摸屏多点识别时识别错乱和画图时轨迹毛刺严重等问题,在原有识别算法的基础上,加入了卡尔曼滤波与跟踪门算法结合的目标跟踪算法处理,提出一种新型红外触摸屏优化算法。该算法通过数据关联中的跟踪门逻辑,将量测值与已有的目标轨迹进行逻辑判断,选择正确的触点信息,剔除伪触点的信息,实现轨迹关联和目标跟踪。同时在红外触摸屏上建立触点的运动模型上,通过卡尔曼滤波实现轨迹的平滑和一定程度上的轨迹预测。在红外触摸屏上的测试表明,与原有的识别算法相比,优化算法增加了约3 μs单点识别时间,但是提高了轨迹在拐角处的平滑度,减少了拐角处约60%的毛刺。优化算法有效地修正了红外触摸屏原有的不足,能实现多触点时的轨迹关联和提高轨迹的平滑程度,能提高红外触摸屏绘图时的实际使用效果。     

Testing usability and trainability of indirect touch interaction: perspective for the next generation of air traffic control systems

This study aims to determine whether indirect touch device can be used to interact with graphical objects displayed on another screen in an air traffic control (ATC) context. The introduction of such a device likely requires an adaptation of the sensory-motor system. The operator has to simultaneously perform movements on the horizontal plane while assessing them on the vertical plane. Thirty-six right-handed participants performed movement training with either constant or variable practice and with or without visual feedback of the displacement of their actions. Participants then performed a test phase without visual feedback. Performance improved in both practice conditions, but accuracy was higher with visual feedback. During the test phase, movement time was longer for those who had practiced with feedback, suggesting an element of dependency. However, this ‘cost’ of feedback did not extend to movement accuracy. Finally, participants who had received variable training performed better in the test phase, but accuracy was still unsatisfactory. We conclude that continuous visual feedback on the stylus position is necessary if tablets are to be introduced in ATC.     

An ergonomics study of thumb movements on smartphone touch screen

This study investigated the relationships between thumb muscle activity and thumb operating tasks on a smartphone touch screen with one-hand posture. Six muscles in the right thumb and forearm were targeted in this study, namely adductor pollicis, flexor pollicis brevis, abductor pollicis brevis (APB), abductor pollicis longus, first dorsal interosseous (FDI) and extensor digitorum. The performance measures showed that the thumb developed fatigue rapidly when tapping on smaller buttons (diameter: 9 mm compared with 3 mm), and moved more slowly in flexion–extension than in adduction–abduction orientation. Meanwhile, the electromyography and perceived exertion values of FDI significantly increased in small button and flexion–extension tasks, while those of APB were greater in the adduction–abduction task. This study reveals that muscle effort among thumb muscles on a touch screen smartphone varies according to the task, and suggests that the use of small touch buttons should be minimised for better thumb performance.     

The impact of on-road motion on BMS touch screen device operation

This study investigates the effect of vehicle motion on performance, usability and workload for a touch screen in-vehicle Battle Management System (BMS). Participants performed a series of battle management tasks while a vehicle was driven over sealed (characteristic of 'normal' vehicle motion) and unsealed (characteristic of 'high' vehicle motion) roads. The results indicate that unsealed road conditions impair the performance of information input tasks (tasks that require the user to enter information, e.g. text entry) but not information extraction tasks (tasks that require the user to retrieve information from the system, e.g. reading coordinates). Participants rated workload as higher and the system as less usable on the unsealed road. In closing, the implications for in-vehicle touch screen design and use in both military and civilian driving contexts are discussed. Practitioner Summary: The effect of motion on interacting with in-vehicle touch screen devices remains largely unexplored. This study examines the effect of different levels of vehicle motion on the use of a BMS. Using the system under off-road conditions had a detrimental impact on workload, performance and usability.     

新型触摸屏与DSP通信的研究与实现

介绍了一种新型触摸屏PWS1711的功能特点以及软件设计方法等。数字信号处理器DSP已经被非常广泛地应用于各个领域，DSP与PWS1711实现基于串口的通信，包括制定通信协议，硬件设置，以及通信软件的编写。谊通信方案经实验验证，切实可行、效率高、性能稳定。     

基于触摸显示屏的手势输入字符方法研究

针对触摸显示屏的操作特点,利用简单通用手势——滑动和点击,提出了两种触摸手势输入字符方法。第一种是基于T9键盘的改进输入方法,第二种是基于全键盘的改进输入方法。这两种输入方法节省屏幕使用空间,使用户更易学习的同时降低了误输入机率。