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In this paper the authors describe a detection system for high-precision isotope ratio measurements. International Nuclear Information System (INIS)

The integration of several optical and tactile nanoprobes makes the 3D-nanopositioning machine suitable for various tasks, such as long range scanning probe microscopy, mask and wafer inspection, nanotribology, nanoindentation, free form surface measurement as well as measurement of microoptics, precision molds, microgears, ring gauges and small holes.Ĭomputer-controlled detection system for high-precision isotope ratio measurements

The problem, how to design nanopositioning machines with uncertainties as small as possible will be discussed. The nanometrology is described as the today's limit of the precision engineering. Nanomeasuring and nanopositioning engineering represents important fields of precision mechatronics. Precision mechatronics is defined in the paper as the science and engineering of a new generation of high precision systems and machines. JÃ¤ger, Gerd Manske, Eberhard Hausotte, Tino Mastylo, Rostyslav Dorozhovets, Natalja Hofmann, Norbert Precision mechatronics based on high-precision measuring and positioning systems and machines

Compared with the traditional time interval measurement system,the method simplifies the system design and reduce the influence of bad weather conditions,furthermore,it satisfies the requirements of low costs and miniaturization. Laser ranging is suitable for laser system, for it has the advantage of high measuring precision, fast measuring speed,no cooperative targets and strong resistance to electromagnetic interference,the measuremen of laser ranging is the key paremeters affecting the performance of the whole system.The precision of the pulsed laser ranging system was decided by the precision of the time interval measurement, the principle structure of laser ranging system was introduced, and a method of high precision time interval measurement in pulse laser ranging system was established in this paper.Based on the analysis of the factors which affected the precision of range measure,the pulse rising edges discriminator was adopted to produce timing mark for the start-stop time discrimination,and the TDC-GP2 high precision interval measurement system based on TMS320F2812 DSP was designed to improve the measurement precision.Experimental results indicate that the time interval measurement method in this paper can obtain higher range accuracy. Wang, Zhen Lv, Xin-yuan Mao, Jin-jin Liu, Wei Yang, Dong Method of high precision interval measurement in pulse laser ranging system

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