基于塑料光纤和棱镜结构的光纤式转速传感器

介绍了一种基于塑料光纤和棱镜结构的光纤式转速传感器,以提高机车轴端速度传感器的绝缘耐压等级和抗电磁干扰能力.传感器使用塑料光纤,以提高耐振动性能,并降低成本;在每个通道中使用2片直角棱镜以减小传感器体积;在一个模块中集成多组光纤,通过控制光缝的位置误差来控制通道之间的相位差,以简化制造工艺.试验结果表明,该传感器的测量性能满足要求,耐压等级被提高到10000 V以上.

Optical fiber rotational speed sensor based on plastic optical fiber and optical prism

This paper makes a sample study of selected listed companies of information and technology industry in Shenzhen and Shanghai stock markets, which adopt an encouragement scheme of the stock option in 2006-2012 year of as a sample. The present study, using the methods of comparative analysis and paired sample T test, does a comparison from the longitudinal and horizontal aspects. The judgment is comprehensively made about whether the implementation of equity incentive improves the industry of information and technology. The paper also does a research on the feature and effect in the application of equity incentive. The results shows:1.These listed companies have embodied a relatively unimodel in equity incentive, the incentive intensity is small, and also the incentive period is a little short; 2.By comparing the implementation of equity incentive of one-year and multi-year sample, it is found that the implementation of equity incentive is not so significant as to improve the performance of listed corporations of information and technology industry. So, this paper offers the following advice: stock markets should improve its efficiency; government''s supervision varies with the actual situation of industry; the internal governance structure of the company should be well developed; incentive benefit plans will be implemented, etc.