Microdose coating thickness gauges

Instruments for measuring the thickness of coatings based on the radiation conversion method are described. These instruments can measure the thickness of coatings when their magnetic and electrical properties are only slightly different from those of the base.Translated from Izmeritel'naya Tekhnika, No. 9, pp. 28–30, September, 1993.     

Coulometric thickness gauges and metrological assurance

The potentialities of the coulometric method of thickness measurement are analyzed. The design features and technical capabilities of the Limeda DEM microcoulometric thickness gauge are considered. The gauge can be used for measurements on a small area (1 mm²) with a rapid rate of electroetching (0.5 μm/sec). Methods and means of providing metrological assurance for the gauge are briefly outlined. Translated from Izmeritel'naya Tekhnika, No. 3, pp. 27–31, March, 1996.     

Means of checking coating thickness gauges

Measurement Techniques -     

基于ARM平台的声呐换能器绝缘自动测试仪

针对声呐换能器绝缘检查中存在的自动化程度低、检查效率低和检查有一定危险性的问题,研制了一款声呐换能器绝缘自动测试仪.该测试仪采用ARM作为主控,用电压比较法和全桥法进行组合测试,通过高压电路产生测量所需的高压,利用选通控制和串口实现测量通路的自动化和远程控制,实现了测量自动化,提高了装备维修保障效率.     

Samples for the calibration and testing of radioisotope thickness gauges

Conclusions The suggested technique for testing samples, and for calibrating and testing contactless thickness gauges by means of a set of samples, ensures uniform measurements and the required precision in testing instruments.Manufacturing plants should have a reference set of samples for calibrating and testing instruments produced by them. The agencies of the State Committee of Standards, Measures, and Measuring Instruments should certify these samples.Manufacturing plants should attach three test samples to each instrument supplied by them. These samples should be certified by the plant according to the above technique.     

全自动远程虹吸式雨量计的研制

针对在野外环境中如何实时、准确地获取降雨资料的问题,在综合考虑各类雨量计的原理、使用方法以及优缺点后,设计了一种基于应变式压力传感器的新型虹吸式雨量计.它具有传统虹吸式雨量计低功耗、测量不受降雨强度大小的限制的优势,并通过压力传感器保证了测量精度,而且对虹吸过程中的降雨采用最小二乘法的算法进行补偿.最后,经过算法优化后的数据通过数据采集器上的GSM模块实现数据的远距离传输,从而大大提高了它的应用范围.     

Measures of the thickness of coatings for use in graduation and calibration of magnetic thickness gauges

Experimental investigations into the development and production of stepped measures of the thickness of coatings of copper on steel with a nickel underlayer are described. The metrological characteristics of already manufactured thickness measures of coatings are presented along with the step patterns and error chart of a magnetic thickness gauge. A thickness gauge produced at the Institute is investigated using a bank of thickness measures for coatings. Translated from Izmeritel'naya Tekhnika, No. 6, pp. 33–35, June, 1999.