排序方式: 共有12条查询结果,搜索用时 31 毫秒
1.
At presrent, the photoelectric switch is more and more widely used in the industrial automation equipment.It can be finished counting industrial products by using the characteristic of the photoelectric switch which can detect the objects without touching them. This design uses the modular design method,including power-supply module, The photoelectric conversion module, optocoupler isolation circuit module, power off protection module, matrix keyboard module, counting module and The display module. It mainly uses 51 single-chip microcomputer to control the system,uses the keilC51 software to design program,uses the Proteus software to complete the simulation. Through the experiment, it proves the design is feasible. 相似文献
2.
多用射弹演示装置的设计与使用 总被引:1,自引:1,他引:0
采用自制弹簧枪,配用激光瞄准,光电控制,制作了多用射弹演示装置,使用该装置可验证多个规律。 相似文献
3.
本文介绍了应用于高压脉冲发生系统的光电开关技术的发展,讨论了此种开关所需材料性能、一般工作原理、发展与前景及几种研究方法。 相似文献
4.
<正>We demonstrate a sub-nanosecond electro-optical switch with low crosstalk in a silicon-on-insulator(SOI) dual-coupled micro-ring embedded with p-i-n diodes.A crosstalk of -23 dB is obtained in the 20-μm-radius micro-ring with the well-designing asymmetric dual-coupling structure.By optimizations of the doping profiles and the fabrication processes,the sub-nanosecond switch-on/off time of400 ps is finally realized under an electrical pre-emphasized driving signal.This compact and fast-response micro-ring switch,which can be fabricated by complementary metal oxide semiconductor(CMOS) compatible technologies,have enormous potential in optical interconnects of multicore networks-on-chip. 相似文献
5.
胡文杰 《分析测试技术与仪器》2005,11(1):75-78
主要介绍了TU1221型紫外-可见分光光度计的原理、应用及维修,对错误代码NG1、NG2、NG8、NG9等常见故障现象进行了原因分析与排除. 相似文献
6.
近几年,国际上出现了一种新型的测量重力加速度的教学仪器.该仪器采用光电开关作为传感器,采用电脑作为测量和显示单元.由于这套仪器价格昂贵,操作复杂,国内应用较少.本文介绍一种自制单片机重力加速度测试仪.与国外同类仪器相比,具有价格低廉、操作简单的特点.特别适合学生做重力加速度实验探究. 相似文献
7.
Photoconductive semiconductor switches (PCSSs) are widely used in high power ultra-wideband source applications and precise synchronization control due to their high power low-jitter high-repetition-frequency. In this letter, a 14-mm gap semi-insulating GaAs PCSS biased under 20 kV is triggered by a 1064-nm laser with a repetition frequency of 30 Hz. Although the trigger condition is greater than the threshold of the lock-on effect, the high gain mode is not observed. The results indicate that the high gain mode of the PCSS is quenched by decreasing the remnant voltage of pulsed energy storage capacitor. 相似文献
8.
光电开关锁定机理的理论分析 总被引:1,自引:1,他引:0
光电开关锁定(lock-on)现象自1990年报道以来已受到广泛关注,许多学者研究其机理并已开展研究将其应用到高压脉冲发生系统中,但目前所有的研究尚处于起步阶段.本文就光电开关锁定机理作了较全面的理论分析,认为光电开关的锁定是光与电联合作用的结果,耿氏效应引起场强动态增强,光脉冲产生的光电子引起本征碰撞电离,从而比较完整地解释了光电开关处于锁定状态时的增益现象. 相似文献
9.
10.
用0.8μm的增益开关半导体激光器,照射以Cr:GaAs为衬底的光电开关,产生电脉冲,这在国内尚属首次。本文介绍了光电开关的导通原理及我们的实验技术。在对0.8μm的InGaAsP半导体激光器的微波调制下,我们获得了最大峰-峰值为11mV的重复电脉冲。 相似文献