轨道交通标准轮对轮径测量装置

介绍了一种轨道交通车辆车轮在线自动化测量装置。这套装置采用了分段测量和大数、小数分开测量的原则。使用时将测量装置固定在车轮上,电机驱动测头沿车轮轮径完成摆动扫描测量,将所测值通过采样传到上位机,其中的极大值即为车轮的直径。通过实验比对验证该装置的可靠性,并且进行了使用该装置测量结果的不确定度分析,其结果表明完全满足轨道交通标准轮对的技术要求。     

平均值-极差控制图在音速喷嘴式气体流量标准装置测量过程中的应用

音速喷嘴式气体流量标准装置是气体流量重要的计量标准,其测量过程的情况直接反映了装置的准确性、重复性、稳定性。使用控制图可以记录装置的测量过程,并由此判断其测量过程是否处于受控状态。本文介绍了平均值-极差控制图在音速喷嘴式气体流量标准装置测量过程中的应用。     

弯管流量计在热电厂中压蒸汽流量测量中的应用

弯管流量计是一种典型的节能型差压式流量测量装置,本文通过对弯管流量计的工作原理、基本结构及性能特点等方面的分析,阐明了其在中压蒸汽流量测量中的适用性,并指出了测量装置自身存在的不足之处,进而在测量装置的设计、安装、使用和日常的维护等几个方面提出了相应指导意见。     

房间空调器实际运行性能测量装置的精度标定与应用

房间空调器实际运行性能的测量往往需要利用多种类型的物理量,相应的测量装置也包含多种类型的传感器,采用误差合成方法难以准确地反映现场性能测量装置在实际使用过程中的测量精度。鉴于此,本文提出了一种利用空气焓值法试验装置标定实际性能测量装置精度的方法,并给出了其标定测试工况。在此基础上,将标定后的测量装置应用于两台空调器的实际运行性能测量,获得了用户对空调器的使用行为和空调器的实际运行性能。本研究所提出的测量装置精度标定方法有利于推动我国房间空调器行业现场性能测量工作的开展。     

液化石油气加气机容积式计量标准装置的研制

本文介绍了液化石油气加气机容积式计量标准装置的基本原理、结构和使用方法，并对其测量不确定度进行了评定。结果表明：本装置设计原理正确、使用方便、测量准确度较高，适宜推广使用。     

三点测定器的设计与应用

介绍了一种测量圆环形零件平面不平度的测量装置,分析了这种测量装置制造误差与测量精度的关系,提出了在实际使用时应注意的一些问题和在其他方面应用。     

一种用于四轮定位仪的校准装置结构设计

汽车四轮定位仪校准装置是用于对汽车四轮定位仪的测量和校准。本文针对目前汽车四轮定位仪校准装置为一体式结构,采用涡轮蜗杆驱动模式,在检测过程中存在间隙大、测量准确度低、工作效率不高、不能涵盖对各类四轮定位仪的测量和校准,包括不便携带等使用缺陷,提出了汽车四轮定位仪校准装置采用四分体式结构,步进电机作为驱动器,圆光栅传感器作为测量标准的设计方案,提高了校准装置的测量准确度,仅供参考。     

精密空气密度测量装置的研制

对采用公式法进行空气密度测量进行了分析,基于CIPM-2007公式,研制精密空气密度测量装置,改进了目前测量工作中的缺点和不足,实现对空气密度的自动实时测量;通过实际测量,当CO2含量达到1470．6×10^-6时,与采用近似公式进行测量的数据的相对误差达到0．040％,验证了该装置对空气密度测量准确度的提高;装置配套软件方便易用,具有良好、完善的使用功能。     

真空测量装置的流导对测量真空度的影响

夹层真空度是影响低温容器真空绝热性能的主要因素。真空度测量结果不仅与真空规管本身的测量精度有关,还与真空测量装置的流导有关。搭建了真空测量系统,设计两种不同流导的真空测量装置,模拟高真空多层绝热低温容器真空测量系统的实际工况,测量这两种装置下的真空度并进行分析。结果表明真空测量装置的流导大小对该装置的真空度测量有较大影响,流导大的测量装置需要较短的抽气时间就能保证该装置上规管的测量值有较好的精度。结果可为低温容器真空测量系统的设计、试验和使用提供参考。     

风洞装置校准风量仪不确定度分析

介绍了风量仪的测量原理及校准风量仪的流量装置的原理及测量方法,并对使用风洞装置校准风量仪的测量不确定度进行了分析,对风量仪合理使用及校准提出了建议。     

基于坐标测量机的铁路轮对参数的测量方案

设计了一种基于三坐标测量机的轮对几何参数自动测量装置,对其主要结构和工作原理作了详细分析,并给出来轮对几何参数的计算式。该测量装置结合了三坐标测量机测量精度高和自动测头智能化程度高的特点,可实现工件的自动、批量化检测,它对于解决目前轮对测量手段落后、测量误差大、劳动强度高等问题具有一定的实际意义。     

Small Moisture Content Measurements for Nylon Chip and Granulated Sugar by Dielectric Loss Method

A moisture-content measuring device operating on the dielectric loss measurement principle has been developed. The device can measure the moisture content in the range of 0.1-1.5 percent consistently for the nylon chip and the granulated sugar.     

Experimental study of construction mechanism of V(z) curves obtained by line-focus-beam acoustic microscopy

The propagation characteristics, viz., phase velocity and attenuation, of leaky surface acoustic waves (LSAWs), excited on the water/sample boundary are obtained through analyzing the V(z) curves measured by line-focus-beam acoustic microscopy. However, different values of these characteristics are obtained, depending upon different ultrasonic devices and operating frequencies employed. The construction mechanism of V(z) curves was investigated experimentally by measuring the amplitude and phase for Teflon to provide an understanding of the device performance for velocity measurements. A V(z) curve measured for Teflon, on which no leaky waves are excited when water is the coupling medium, can be used for the characteristic device response, depending only upon the device parameters and the operating frequencies. From the investigation of the ultrasonic device and the frequency dependences of the characteristic device responses, the phase gradient was found to be directly related to values of measured LSAW velocities. From this result, apparent frequency dependences in LSAW velocity measurements are explained quantitatively for a specimen of gadolinium gallium garnet.     

SnO2-nanowires grown by catalytic oxidation of tin sputtered thin films for formaldehyde detection

The aim of the present work is to test the sensing behaviour of tin dioxide nanowires, which have been grown directly onto a sensing device. This device consists in an alumina substrate provided with platinum interdigitated microelectrodes and a Pt heater on the reverse side. The nanowire growing process based on a vapour-liquid-solid method consists of three steps: deposition of a tin thin film by DC sputtering, a 5 nm-thick Au layer deposition and an annealing treatment in the presence of oxygen for the growth of the SnO₂ nanowires.These samples have been tested under different concentrations of formaldehyde (HCHO), showing a high sensitivity and very short response and recovery times even at low operating temperatures (130 °C).     

A thermal comparator sensor for measuring autogenous deformation in hardening Portland cement paste

This paper describes a simple and accurate experimental device specially developed to measure autogenous deformation in hardening cement-based materials. The measuring system consists of a so-called thermal coparator sensor and a modular thermostatically controlled system. The operating principle of the thermal comparator is based on thermal expansion of aluminium. A particular characteristic of the measuring system is the fixation of the thermal comparator sensor to the deforming speciment. The modular system ensures effective thermostatic control of the hydrating cement paste samples. The technique allows continuous measurement with high accuracy of the linear deformation as well as determination of the activation energy of autogenous deformation.     

超声宽量程微量气体浓度检测的仿真研究

基于超声技术和复杂可编程逻辑器件（CPLD）实现对两路同频超声传输过程中不仅是半个周期以内的相位差，而且大于半个周期乃至多个半周期的相位差的检测，仿真实现了微量气体浓度宽量程范围的检测，为基于超声技术的微量气体浓度检测的量程拓展提供了’技术借鉴。     

Measurement of the Spectral Characteristics of a Road Surface

The intensity of the emission of the noise from tires depends largely on the structure of the road surface, which in the range of acoustic frequencies is characterized by roughness. The design and principles governing the basic modules of a device for measuring the roughness of a surface are considered. The operating indicators of the device and a technique for processing the measured signal are given. __________ Translated from Izmeritel'naya Tekhnika, No. 10, pp. 45–47, October, 2005.     

加速度计稳定性测试的补偿技术

介绍了加速度计稳定性的测量装置及方法。由于环境因素可以对稳定性测试产生影响,因此对加速度计的工作温度、基础水平倾角的影响进行了分析。通过研究加速度计温度误差模型,确定了建模方法。在稳定性试验中,使用高精度铂热电阻测量加速度计的工作温度,对加速度计的模型方程系数和输出进行温度补偿;使用地震前兆倾斜仪监测基础水平倾角变化,对加速度计零位输出进行补偿。     

Method for measuring the weight concentration of O-isobutyl methyl phosphonate with development of advanced sampling devices

A method is considered for measuring the weight concentration of O-isobutyl methyl phosphonate in air, and new engineering solutions are proposed for a sampling device with improved operating characteristics for ecological monitoring of the atmosphere. Translated from Izmeritel’naya Tekhnika, No. 5, pp. 68–72, May, 2009.     

Device for measuring energy of radiation pulses from a laser operating in the frequency mode

Conclusion In the device described, a semiconductor diode is used as the radiant energy receiver. Although the photoelectric method is not absolute, practice shows that instruments based on it can be used successfully for measuring the energy of laser radiation pulses when calibrating these devices by means of calorimeters, bolometers, etc. An operating test of the device described for measuring the energy of laser radiation pulses showed its high sensitivity stability.The great advantage of the photoelectric method is the high rate of repetition of the measurements, which is unattainable by the use of calorimetric methods.The use of two channels of different sensitivity for measuring the energy of radiation of one wavelength makes it possible to extend the dynamic range. The number of measurement channels in principle can be even greater than two, which extends the possibility for its use in controlling the energy characteristics of a laser.Translated from Izmeritel'naya Tekhnika, No. 12, pp. 40–43, December, 1974.