K9F1G08U0A在MSP430单片机系统中的应用

根据NAND FLASH芯片K9F1G08U0A的非易失性、容量大、速度快、功耗低等特点,将其作为存储介质应用于MSP430单片机系统扩展中,通过相应的软硬件设计,实现采集数据的实时存储,便于后续对数据进行离线分析及研究处理,并通过C8051F320单片机USB接口与PC机通信。     

K9F1G08UOA在MSP430单片机系统中的应用

根据NAND FLASH芯片K9F1G08U0A的非易失性、容量大、速度快、功耗低等特点,将其作为存储介质应用于MSP430单片机系统扩展中,通过相应的软硬件设计,实现采集数据的实时存储,便于后续对数据进行离线分析及研究处理,并通过C8051F320单片机USB接口与PC机通信.     

无线温湿度采集系统设计

介绍了一种利用PT100热电阻和HS1101湿度传感器的无线温湿度采集系统的设计方案,采用C8051f330单片机配合铂电阻两线制测量电路和HS1101频率输出电路,2.4 GHz ISM频段射频收发芯片nRF24L01作为发送和接收无线通信模块,由CY7C68013结合无线通信模块作为接收机,通过USB将温湿度数据传送到PC机,并由LabWindows/CVI显示实时温湿度变化曲线。     

基于C8051单片机的压力表自动检测系统设计

系统以C8051F020单片机为控制核心,由MCU模块、键盘输入模块、液晶显示模块、温度传感器模块等功能模块组成。检测系统结构简单,并进行了抗干扰设计,使其具有较好的抗干扰能力,保证系统可靠工作。     

USB3．0引爆千亿元商机

有着超高速传输速度的USB3.0,有机会在短时间内取代USB2.0;成为USB主流传输接口。全球各芯片大厂、IC设计公司与终端设备厂,目前正积极投入USB3.0相关技术开发,准备抢攻已暌违八年的USB标准时代交替的千亿元商机。     

ZLG7290在智能电动机保护装置中的应用

ZLG7290是一种全新的、具有I2C总线的键盘和显示接口芯片,使用该芯片设计的智能电动机保护装置的键盘和显示电路,克服了传统智能电动机保护装置中键盘     

基于C8051F040电磁控制运动装置的实现

本文设计的是以16位低功耗C8051F040单片机为控制芯片的简易电磁控制运动装置,整个系统包含键盘模块、液晶显示模块、角度采样模块、恒流源模块、单片机控制模块、单摆机械装置模块、电磁控制模块等。由角度传感器、单片机以及恒流源构成闭环反馈控制,通过PID控制使电磁控制装置的磁场变化频率和单摆固有频率基本相等,以达到单摆的自由谐振,能够在允许误差范围内摆到指定角度及周期。     

便携式多芯电缆故障检测系统设计

以C8051F020单片机为核心,通过硬件电路和软件程序设计,开发便携式多芯电缆性能及故障检测系统。通过对电路、程序调试,系统实验及工程应用证明,系统能高效率完成电缆的故障检测,并且操作简便,运行稳定可靠。     

利用Cortex-M3实现同步电动机失步保护的装置

提出一种基于Cortex-M3处理器的失步保护器的设计方法。硬件设计上,介绍了模块间的硬件连接情况,软件上,介绍了A/D采样的实现情况。该保护器采用STM32F103ZE作为微控制器,采用MicroSD卡存储采集的数据,通过USB接口向PC机输送实时数据。该系统的软件使用RealView MDK开发。     

用DSP实现三相全控整流电路故障在线诊断

阐述了一种以TMS320F240 DSP芯片为核心的三相全控整流电路故障诊断装置，介绍了该装置的设计原理、硬件构成和软件编写，最后通过实验证明该设计方案的可行性。     

基于USB接口的电路检测系统的硬件设计

随着USB(universal serial bus)接口技术的迅速发展,使其已经成为微机的基本配置,将USB技术、虚拟仪器技术、单片机技术以及数据采集技术进行综合运用,开发了一种专门用于电路板检错的USB外设———基于USB接口的电路板检错笔。     

基于USB2.0的红外图像数据采集系统

随着红外遥感技术的飞速发展,红外图像数据的实时采集和传输已成为必须研究的课题。基于USB20的图像数据采集系统的设计提出了2个方面的要求一方面,要求接口简单灵活且有较高的数据传输率;另一方面,由于数据量通常都较大,要求主机能够对实时数据作出快速响应,并及时进行分析和处理。在USB2.0协议中,数据传输速率可达到480Mbit/s,且传输稳定,能够满足图像数据的实时传输要求。本文提出了应用USB2.0作为红外图像采集的通讯接口,实现快速、实时的红外图像采集传输。     

Research on the interface factor in the development and utilization of new technology

AbstractThe interface factor in the development and utilization of new technology is analyzed with questionnaire surveys. The interface factor is found to determine R&D performance in a study of large manufacturing companies in the United States and in a study of computer utilization performance in commercial banks in the United States. A comparison of the interface factor in the functioning of R & D in the United States and Japan suggests that interface problems may be less serious in Japan. Company experience is reported which indicates that the interface function can be controlled by management policies, procedures and practices. The need for greater attention to the interface factor by executives and by researchers on R & D management is a conclusion which follows from the findings presented in this paper.     

Research on the interface factor in the development and utilization of new technology

The interface factor in the development and utilization of new technology is analyzed with questionnaire surveys. The interface factor is found to determine R&D performance in a study of large manufacturing companies in the United States and in a study of computer utilization performance in commercial banks in the United States. A comparison of the interface factor in the functioning of R & D in the United States and Japan suggests that interface problems may be less serious in Japan. Company experience is reported which indicates that the interface function can be controlled by management policies, procedures and practices. The need for greater attention to the interface factor by executives and by researchers on R & D management is a conclusion which follows from the findings presented in this paper.     

Box‐Office Demand: The Importance of Being #1

We propose a theoretical framework to understand the effect on a movie's eventual theatrical success of leading the box office during the opening weekend. We consider two possible channels: a positive shock to the utility from watching the movie and a greater awareness of the movie's existence. We derive a series of testable predictions, which we test on U.S. box office data. The results suggest that being #1 in sales during the opening weekend has an economically and statistically significant effect on the movie's total demand; and that the primary channel for this effect is through the greater awareness induced by being #1.     

箱式电阻炉电热元件的计算机辅助设计

本文介绍了借助计算机进行箱式电阻炉电热元件的优化设计方法。利用文中提供的程序设计方法,能快速准确地设计出不同炉膛尺寸、不同功率、不同工作温度的箱式电阻炉的电热元件,能自动打印出各种设计参数和电热元件结构图。     

某矿用隔爆兼本安型变频器结构设计

变频器已广泛应用于煤矿生产中,防爆箱体设计是其至关重要的环节。对此,本文应用经典力学进行了结构设计,应用有限元分析进行了刚、强度校核,得出了高效、可行的防爆箱体结构设计方法。     

The abilities of understanding spatial relations,spatial orientation,and spatial visualization affect 3D product design performance: using carton box design as an example

Three-dimensional (3D) product design is an essential ability that students of subjects related to product design must acquire. The factors that affect designers’ performance in 3D design are numerous, one of which is spatial abilities. Studies have reported that spatial abilities can be used to effectively predict people’s performance in conducting complex operations. Nevertheless, few studies have explored the relationship between spatial abilities and designers’ performance in 3D product design. Spatial ability is a type of mental ability and comprises numerous factors. Carton box design is a typical type of standardized 3D product design, in which designers’ performance is affected by the spatial abilities they possess. The most crucial factor among these abilities is the space conversion ability, which is the ability to convert two-dimensional (2D) surface developments into 3D perspective views and convert 3D carton boxes into 2D plans. These operations require an in-depth perception of objects, an understanding of the relative spatial relations among objects, and spatial visualization. In this study, carton box design was used as an example to investigate, using structural equation modeling, the effects that the ability to understand spatial relations, spatial orientation, and spatial visualization have on designers’ performance in 3D product design. The results indicated that all three spatial abilities (i.e., understanding spatial relations, spatial orientation, and spatial visualization) directly influence designers’ performance in carton box design. Therefore, spatial abilities are vital factors affecting designers’ performance in 3D product design.