共查询到19条相似文献,搜索用时 187 毫秒
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随着微电子技术的迅速发展,微处理器和单片机的应用越来越深入和广泛。目前,它也广泛用于音频视频技术中。利用数位式音频处理器件对声音信号进行数字处理的设计方案,突出点在于利用单片机和虚拟仪器技术相结合对话筒输入信号进行延时、调九段均衡、左右声道等操作。数位式音效处理器支持I^2C总线,I^2C总线最大优点就是简单性和有效性。利用LabWindows/CVI半图形化语言设计的软面板界面友好,易操作。 相似文献
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通过采用两片PIC18F448及其外围器件实现了机载环控地面检测系统的数字化设计。通过I^2C总线实现两片单片机之间的数据传输与协调,并利用其CAN接口模块实现多套检测系统的网络化和远程控制操作。 相似文献
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分析了I2C总线的工作原理及其数据传输时的总线规范,采用CPLD实现I2C总线控制器各模块功能,模拟I2C总线器件和处理器之间的数据通讯,仿真结果表明其能满足I2C总线的电气特性及传输规范要求。 相似文献
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本文介绍了I2C总线的结构及传输时序,并给出了利用单片机的基本I/O口实现I2C总线进行多点温度测量的方法。 相似文献
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关于 Stirling公式的一个注记 总被引:2,自引:0,他引:2
谢庭藩 《中国计量学院学报》2000,11(2):110-114
记 rn=nne- n 2πn.这个注记证明 ,当 n≥ 1 0时rn 1 +11 2 n+ 12 88n2 +2 4 9.2 n 相似文献
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阐述了一种系统基于USB协议高速高精度数据采集设计,系统采用一种新型音频A/D芯片AKM5394,利用差分方式进行数据采集,由CPLD芯片及高速、高精度的AKM5394芯片、FIFO,开发高精度高速数据采集系统,并使用USB接口在主机中实现数据存储与图形显示。该系统在Windows 2000或Windows XP环境下的驱动程序及用户应用程序采用的是Visual C 语言实现的,而固件代码则是用C语言实现的。系统具有低成本、高性能的特点,能够广泛应用于精度、速度各方面性能要求比较高的测控、信号分析等多个领域。实验室环境下测量的精度达到22位以上,效果良好。 相似文献
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A containerless automated system for processing high temperature reactive intermetallic compounds from the liquid state has been developed. Single crystals 2.5 cm in diameter have been processed in various atmospheres from nearly turbulent liquids. The liquid is electromagnetically contained in such a fashion as to permit the propagation of the solidification interface to control the resulting dimensions and structure. The operating temperature reaches nearly 2000°C depending upon the material and the resulting diameter control is within ± 0.08 mm
Several operational characteristics that mandate the need for a dedicated computer control and data acquisition system are its fast response to changes in inputs, sensitivity to changes in inputs, highly interactive nature, inherent transient behavior and small parameter region of stable operation. The computer control system is built around a DEC 11/23+computer and an interfaced image camera. The control system is contactless as all measurements are from on-line image analysis and remote sensors. Two control configurations, both of which employ three control loops are used to control three process outputs by manipulating two process inputs. In order to do this two controllers are cascaded. One control configuration is based totally on image analysis. The controllers are standard PI or I mode controllers. Several ingots processed using the flexible computer control system are shown. Samples are presented of processed specimens that show the degree of dimensional control possible. The systems TiAI, TiAI × X, and Ni3AI are discussed as examples of the control of structure and properties that are attainable utilizing the processing techniques described. 相似文献
Several operational characteristics that mandate the need for a dedicated computer control and data acquisition system are its fast response to changes in inputs, sensitivity to changes in inputs, highly interactive nature, inherent transient behavior and small parameter region of stable operation. The computer control system is built around a DEC 11/23+computer and an interfaced image camera. The control system is contactless as all measurements are from on-line image analysis and remote sensors. Two control configurations, both of which employ three control loops are used to control three process outputs by manipulating two process inputs. In order to do this two controllers are cascaded. One control configuration is based totally on image analysis. The controllers are standard PI or I mode controllers. Several ingots processed using the flexible computer control system are shown. Samples are presented of processed specimens that show the degree of dimensional control possible. The systems TiAI, TiAI × X, and Ni3AI are discussed as examples of the control of structure and properties that are attainable utilizing the processing techniques described. 相似文献
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