三极管测量练习装置的开发

该文分析了三极管测量技能教学成效不佳的原因,开发了一个三极管测量练习装置。练习装置利用微控制器产生随机信号,随机选择管子类型,随机分配管脚到测试端口,随机设置故障,引导学生通过测量来判断管子类型、管脚排列和有无故障。实践表明,新装置能有效提高学生测量三极管的技能。

三极管测量“三字歌”及检测法

无线电爱好者来说,三极管的测量往往是很头疼的事,因为他们的基础比较差。在实际测量和应用三极管时,其性能往往是参差不齐,特别在检修时尤其如此。因此,在测量之时暴露出许多问题。通过实践和多年的维修经验,我对熟练掌握测量三极管这方面的技巧做了一下总结,即:《三极管测量“三字歌”》,并在实际应用中也取得了很好的效果。为此,仅供初学者参考。

Short Range Laser Rangefinder Employing False Target Rejection

Till now a laser rangefinder has been used to find the range of a stationary target or the variations and deformities of a plane surface like in the manufacturing processes.New concept in the design of a laser rangefinder for a moving target is described.It is based on triangulation method of ranging and combines with a threefold false target rejection circuit to eliminate the possibility of false target indication due to light reflected by any obstruction in the line of sight of laser source and the target. The false target rejection is done twice through hardware and once through software.

简单易制的晶体三极管配对测量仪器

在许多情况下晶体三极管需要讲究配对使用,而在业余条件下三极管配对却是难上加难。购买市售的晶体三极管配对测量仪,因价格较高,对于广大业余电子爱好者来说实在难以接受。为此,在这里介绍一种晶体三极管配对测量仪电路,制作简单、取材方便、经济实用,而且具有体积小、成本低、使用方便,不失为一种替代昂贵仪器的必备工具。

High Speed Laser 3D Measurement System

Using the method of line structure light produced by a laser diode,three dimensional profile measurement is deeply researched.A hardware circuit developed is used to get the center position of light section for the improvement of the measurement speed.A double CCD compensation technology is used to improve the measurement precision. An easy and effective calibration method of the least squares to fit the parameter of system structure is used to get the relative coordinate relationship of objects and images of light section in the directions of height and axis. Sensor scanning segment by segment and layer by layer makes the measurement range expand greatly.