An automatic commutating device for multicurve strain recording

Conclusion The commutating device described provides facilities for working with any strain-gauge transducers. It can be used with carrier frequency amplifiers and circuits without amplifiers working on direct or alternating current. In addition, the device can be used for checking temperature and many other parameters.     

A study of the recording systems of laser interferometers for measuring vibration

An examination is made of laser interferometer recording systems with one or two channels, and of methods of raising their resolution. An improved two- channel system is proposed which has a number of important advantages over existing systems.Translated from Izmeritel'naya Tekhnika, No. 9, pp. 34–37, September, 1993.     

A multichannel laser system for automatic vibration control

Translated from Izmeritel'naya Tekhnika, No. 8, pp. 35–37, August, 1991.     

车辆轮对落轮在线非接触自动检测设备

研制出一种新的车辆轮对落轮非接触自动检测设备。该设备利用 CCD, PSD 型激光位移传感器、涡流传感器以及数据采集系统完成轮对相关尺寸的数据信号采集,并由工控机对各数据进行融合处理,实现轮对左右两轮饼近十个参数的非接触精确测量。现场使用表明,该设备的测量精度优于±0.1mm 。     

An integrated software system for processing, analyzing, and classifying Raman spectra

Raman spectroscopy is a powerful technique for analyzing various substances, but a significant amount of processing is required to extract useful information from raw spectra. Many research groups develop custom software systems to process spectra, which leads to standard algorithms being repeatedly implemented and novel techniques being difficult to share. This paper presents an integrated software system that processes, analyzes, and classifies Raman spectra. The system is freely available (http://cares.wayne.edu/rp/), open, cross-platform, and extensible, enabling interested parties to utilize and contribute to a common implementation of Raman processing algorithms.A wide variety of useful features are included, such as noise filtering, automated background fluorescence subtraction, principal component analysis, linear discriminant analysis, artificial neural network classification, and support vector machine classification. The system supports customizable groupings of related spectra and is able to retrieve spectra using a searchable database. Everything is executed through a simple graphical user interface.The developed system was used to process two data sets containing different types of spectra. The results demonstrate that the system is capable of fast, accurate processing of Raman spectra. The open system will become even more powerful if other developers are willing to add new and improved features. In addition, it is intended that the freely available system will make Raman spectroscopy more accessible to all researchers and promote progress in the field.     

An automatic alignment system for measuring optical path of transmissometer based on light beam scanning

This paper proposes a novel alignment system based on the measurement of optical path using a light beam scanning mode in a transmissometer. The system controls both the probe beam and the receiving field of view while scanning in two vertical directions. The system then calculates the azimuth angle of the transmitter and the receiver to determine the precise alignment of the optical path. Experiments show that this method can determine the alignment angles in less than 10 min with errors smaller than 66 μrad in the azimuth. This system also features high collimation precision, process automation and simple installation.     

Write-once optical disk system measuring 300 mm using high-density, pit-edge recording

To meet the requirement for a second-generation digital optical disk with a larger capacity and a higher speed, the new 300-mm, write-once optical disk system described here uses pit-edge recording and the modified-constant-angular-velocity method [Maeda et al., Trans. IEICE E74, 951 (1991)]. New techniques that can use these methods together and are suitable for interchangeability-data composition and independent detection of the leading and trailing edges-have resulted in the most reliable data-storage system ever produced, we believe. The concept of this system, the characteristics of the new techniques, and the optimization of system performance are described.