Windows操作系统是当前测控软件发展的主流操作系统。在 Windows NT操作系统中 ,内核模式驱动程序作为操作系统的一个信任部分 ,运行于 Windows NT的内核模式。但是 ,Windows NT4 .0内核模式不支持浮点运算 ,本文将就此问题 ,探讨如何在...Windows操作系统是当前测控软件发展的主流操作系统。在 Windows NT操作系统中 ,内核模式驱动程序作为操作系统的一个信任部分 ,运行于 Windows NT的内核模式。但是 ,Windows NT4 .0内核模式不支持浮点运算 ,本文将就此问题 ,探讨如何在 Windows NT 4 .展开更多
TH774 2003021578计算机X光影像仪图像采集卡设备驱动程序=Devicedriver for image data acquisition card of computerized radiog-raphy[刊,中]/杨词银(中科院长春光机所.吉林,长春(130022)),黄廉卿//红外与激光工程.—2002,31(1).—8...TH774 2003021578计算机X光影像仪图像采集卡设备驱动程序=Devicedriver for image data acquisition card of computerized radiog-raphy[刊,中]/杨词银(中科院长春光机所.吉林,长春(130022)),黄廉卿//红外与激光工程.—2002,31(1).—82-87简述了计算机X光影像仪(CR)的特点,介绍了CR系统中X光图像的数字化方法,给出了数字化后的X光图像数据采集的硬件电路。简要说明了Windows NT及其核心模式驱动程序的结构,阐释了在Windows NT下I/O请求的工作原理。利用NT DDK开发出计算机X光影像仪图像采集卡的核心模式设备程序,通过软、硬件相结合的方法,实现了对X光图像数据的采集和存储。展开更多
This paper presents a transition-mode zero-voltage-switching inverter for the cooker magnetron of household microwave ovens. The inverter drives a leakage transformer to generate the required high voltage and stabiliz...This paper presents a transition-mode zero-voltage-switching inverter for the cooker magnetron of household microwave ovens. The inverter drives a leakage transformer to generate the required high voltage and stabilized current. For achieving zero-voltage switching, a transition-mode driver L6561 is utilized to detect the ending of transformer resonance and drive an insulated-gate-bipolar-transistor. As transistor is conducted, rectified direct-current voltage drives the transformer. While transistor is cut off, transformer resonates with a parallel capacitor. Transistor conduction time and magnetron power are controlled with a 16-bit digital signal controller dsPIC30F4011. For widening the working range, transistor conduction time is set to be inversely changed with line-frequency input voltage. To demonstrate the analysis and design of this paper, a 1 kW inverter circuit is built. Experimental results show the feasibility and usefulness of the designed magnetron power supply.展开更多
文摘Windows操作系统是当前测控软件发展的主流操作系统。在 Windows NT操作系统中 ,内核模式驱动程序作为操作系统的一个信任部分 ,运行于 Windows NT的内核模式。但是 ,Windows NT4 .0内核模式不支持浮点运算 ,本文将就此问题 ,探讨如何在 Windows NT 4 .
文摘TH774 2003021578计算机X光影像仪图像采集卡设备驱动程序=Devicedriver for image data acquisition card of computerized radiog-raphy[刊,中]/杨词银(中科院长春光机所.吉林,长春(130022)),黄廉卿//红外与激光工程.—2002,31(1).—82-87简述了计算机X光影像仪(CR)的特点,介绍了CR系统中X光图像的数字化方法,给出了数字化后的X光图像数据采集的硬件电路。简要说明了Windows NT及其核心模式驱动程序的结构,阐释了在Windows NT下I/O请求的工作原理。利用NT DDK开发出计算机X光影像仪图像采集卡的核心模式设备程序,通过软、硬件相结合的方法,实现了对X光图像数据的采集和存储。
文摘This paper presents a transition-mode zero-voltage-switching inverter for the cooker magnetron of household microwave ovens. The inverter drives a leakage transformer to generate the required high voltage and stabilized current. For achieving zero-voltage switching, a transition-mode driver L6561 is utilized to detect the ending of transformer resonance and drive an insulated-gate-bipolar-transistor. As transistor is conducted, rectified direct-current voltage drives the transformer. While transistor is cut off, transformer resonates with a parallel capacitor. Transistor conduction time and magnetron power are controlled with a 16-bit digital signal controller dsPIC30F4011. For widening the working range, transistor conduction time is set to be inversely changed with line-frequency input voltage. To demonstrate the analysis and design of this paper, a 1 kW inverter circuit is built. Experimental results show the feasibility and usefulness of the designed magnetron power supply.
