一种液体小流量校准装置的研制

文章介绍了一种液体小流量校准装置,装置研制的目的是为本地区DN(5～32)mm各种液体流量计提供校准服务。通过配备高精度称重传感器、电磁流量计和自动控制系统,实现自动校准及后续数据处理,从而达到流量溯源的目的。其设计结构简单合理、自动化程度高以及应用方便,具有一定的推广价值。     

舵机试验台流量、压力现场校准技术研究

通过对流量、压力现场校准方法的研究和相应校准装置的研制,实现了对某型号舵机试验台流量、压力测量系统的现场校准。     

ATS超声多普勒流量控制系统校准方法研究

对ATS超声多普勒流量控制系统进行流量参数的校准,采用一种间接的测量方法———称重法进行校准,并对过程和结果进行不确定度分析。该方法可成功校准流量参数,精确性和实用性良好。     

车载式流量校准系统的研制与应用

本文介绍了车载式流量校准系统的研制过程、总体技术方案的设计以及实际现场应用等相关内容。     

一种大型结构物称重系统的校准方法

大型结构物称量系统是海洋石油平台设计安装中的重要设备，其测量的准确度直接关系到大型结构物吊装的安全性和科学性。目前国内还没有成熟的方法对该类设备进行校准，文章主要介绍了对大型结构物称重系统的校准方法。试验证明，该校准方法能保证称重系统的量值准确，使其量值有效地得到溯源。     

一体化温度变送器自动校准系统研制

针对一体化温度变送器校准工作中使用仪器繁多、连接线路复杂、数据处理工作量大等问题,研制一体化温度变送器自动校准系统。该系统包括标准恒温槽、多路数据采集装置、标准铂电阻温度计和计算机,其中多路数据采集装置将标准铂电阻配套仪表功能和直流电流表功能进行集成化设计,设置一路标准器通道和六路被校准仪器通道,可实现多支一体化温度变送器的同时校准。系统通过计算机控制程序可实现自动温度控制、温场判定、数据采集及处理以及生成校准记录等功能,且控制准确、自动化程度高。     

称重容罐现场校准方法分析

分析了称重容罐的校准现状,结合称重容罐自身特点及校准特殊性提出以流量法实现现场校准的方法,并通过试验数据验证了此方法的可行性。     

过滤器完整性测试仪校准装置研制及校准方法探讨

针对医药行业过滤器完整性测试仪的溯源需求及现有溯源方案的不足，文章参照JB/T 20200—2021《过滤器完整性测试仪》制药机械行业标准中的技术要求，通过对其关键溯源参数进行分析，研制了一套对过滤器完整性测试仪进行校准的装置，并依据其建立了过滤器完整性测试仪的流量和压力参数校准方法。所研制的过滤器完整性测试仪校准装置准确度更高，整体气密性良好，性能稳定，收纳后的校准装置体积小，重量轻，便于携带到现场开展校准工作。     

现场真空漏孔校准装置的设计

为了减小现场环境与校准环境的差异对真空漏孔校准的影响,通过理论研究,设计了现场真空漏孔校准装置,可实现对真空漏孔的现场校准。考虑到现场真空漏孔校准装置需便于携带及搬运,装置的设计采用了分体式结构。现场真空漏孔校准装置由抽气系统、校准室系统、真空漏孔连接系统、流量输出系统、充气系统、定容室与压力测量系统及烘烤系统等7个部分组成,复合了定容法及固定流导法两种校准方法,预计真空漏孔校准范围为5＆#215;10-10～5＆#215;10-5 Pa？m3/s,合成标准不确定度为10％。     

称重系统巡检仪检测校准装置的开发和研究

使用的一套自动称重装置对海上平台和导管架进行称重。由于称重现场离控制计算机较远,需要利用称重系统巡检仪将现场的信号传给主控机。巡检仪是将模拟量转换成数字量,为了保证转换的精度,需要每年对巡检仪进行检测和校准。但巡检仪的检测校准没有相应规程可以遵循,参照电流表检定方法开发出了巡检仪的检测校准装置和相应的校准软件,实现了对巡检仪的检测和校准,保证了巡检仪在称重数据转换传输过程中的精度。     

Simultaneous Velocity, Thickness and Profile Imaging by Ultrasonic Scan

Ultrasonic velocity is widely used in the investigation of material properties. Physical dimensions such as sample thickness and surface profile can also be the information sought after in nondestructive testing. In a conventional ultrasonic measurement, however, the measured quantity is usually the time-of-flight, not velocity or thickness. When either velocity or thickness is precisely known, the other can be easily deduced. Unfortunately in many cases, neither the velocity nor the thickness is known to the required precision, or they can both vary spatially. A method is therefore needed to map out the spatial distribution of the velocity and thickness simultaneously. The ability to image the surface profiles that give rise to the thickness variation is also desirable. Simultaneous velocity and thickness scan can be implemented in a number of configurations and have been reported by a number of authors in the literature. This paper focuses on the ability of this technique to image very small changes in velocity and thickness simultaneously. This technique is also extended to map out the surface elevation contours and cross-sectional profiles of a sample. Special considerations for achieving accurate and reliable velocity, thickness and profile images are discussed in detail. This technique for nondestructive evaluation and material characterization is then demonstrated using three industrially relevant materials: (1) plasma sprayed thermal barrier coating, (2) composite laminates containing foreign objects and anomalies, and (3) creep/rupture tested superalloy samples.     

The Agile Development of High-Speed Response Air Gauging Technology

A new dimensional air gauging technology was successfully developed using the steepest improvement approach. The steepest improvement technique was fashioned for the continuous never-ending improvement of the compensating air gauges, and it can lead the investigative process quickly along the path of steepest improvement to a better air gauging system. Several very different air gauge designs with progressively improved dynamic performance were discovered, reducing the setting time from 118 to 10 ms. The procedure concluded with a proposal for a completely novel air gauging system for further investigation.     

Laser-Ultrasonics: From the Laboratory to the Shop Floor

Ultrasonics is a powerful technique for inspecting and characterizing industrial materials. It not only can detect bulk and surface flaws, but also obtain information on material microstructure, which determines engineering properties, such as elastic moduli and ultimate strength. However, traditional ultrasound requires liquid or contact coupling for its generation and detection, making it difficult or impossible to apply in many industrial situations. This occurs, in particular, on curved parts and on parts at elevated temperature, a situation widely found in industrial products and during the processing of industrial materials.Through a continuing effort that started more than 10 years ago, the Industrial Materials Institute of the National Research Council of Canada working in collaboration with UltraOptec Inc. has developed a technique called laser-ultrasonics, that circumvents the limitations of the conventional techniques. This novel technique is based on the generation and detection of ultrasound with lasers. The technology we have developed has been demonstrated to be applicable to real industrial conditions. In particular, a system was brought to a steel mill to measure on-line the wall thickness of tubes at 1000°C moving at 4 m/s. The capability of our technology to inspect advanced aircrafts made of composite materials was also demonstrated by inspecting a CF-18 in the hangar of a maintenance facility. UltraOptec Inc. is now in the process of commercializing this technology, in particular, for these two demonstrated industrial applications.     

Optimal process design in selective assembly when components with smaller variance are manufactured at three shifted means

Selective assembly is an effective approach for improving the quality of a product that is composed of two mating components, when the quality characteristic of the product is the clearance between the mating components. In this approach, the components are sorted into several groups according to their dimensions, and the product is assembled by randomly selecting mating components from corresponding groups. A number of previous studies focused on equal width partitioning schemes, in which the dimensional distributions of the two components are partitioned so that all groups have equal widths. When there is a large difference between the variances of the two component dimensions, equal width partitioning will result in a large number of surplus components due to differences between the numbers of components in corresponding groups. Some authors have proposed a method of manufacturing the component with smaller variance at three shifted means to cope with this difficulty. In the present paper, an optimal manufacturing mean design that minimises the number of surplus components is derived. It is shown that the use of the optimal design considerably reduces the number of surplus components compared with using another previously proposed manufacturing mean design and the no-shift design.     

Certification Institutions Expected to Update and Transfer Information on Present Standards

Standards are the basis for production enterprises to organize production, ex-factory inspection, trade (delivery) and technical exchanges, product certification, quality arbitration and supervision.……     

Optimum-Simulation von Ernteprozessen

Zusammenfassung Bei der Gestaltung von Ernteprozessen — beispielsweise des Prozesses Mähdrusch, Körnertransport und -abnahme — als transportverbundene Fließarbeitsverfahren mit mindestens zwei verschiedenen Arbeitsmitteln gibt es einen großen Optimierungsspielraum. Solche Prozesse sind mehrstufige Bedienungsprozesse mit gemischter Anordnung der Bedienungseinrichtungen. Außerdem besitzen sie stark ausgeprägte räumliche Aspekte. Es wird vor allem gezeigt, welche Merkmale solcher Prozesse in Simulationsmodellen abgebildet sein müssen, welche Zielgrößen in Abhängigkeit von welchen Einflußgrößen unter Berücksichtigung welcher Prozeßbedingungen ermittelt werden sollten und wie der Bewertungsprozeß zur Ermittlung der gewünschten Informationen gestaltet werden muß.     

Brainstorming for ISO Strategy 2016-2020

正Responding to ISO’s appeal for survey for the to-be-developed ISO Strategy Plan for 2016-2020,SAC hosted a special workshop over the needs and comments of various fi elds on June 8 in Beijing.The workshop was attended by ISO President-elect and Ansteel General Manager Zhang Xiaogang,SAC Vice-Administrator Yu Xinli,and 30 experts from     

CNAS Passes APLAC's PTP Review

正The review group of Asia Pacific Laboratory Accreditation Cooperation(APLAC)carried out a 4-day peer review of the proficiency testing provider(PTP)for China National Accreditation Service for Conformity Assessment(CNAS)from July 28 to 31,2014.CNAS passed the PTP review with excellent performance.Two senior peer reviewers of APLAC made a comprehensive,rigorous and detailed review of CNAS’s PTP accreditation activities,and made the on-spot inspection of the review groups in Shanghai and Shenzhen respectively.     

新闻(英文)

正China and Greece Sign the Standardization Cooperation Agreement Witnessed by Chinese Premier Li Keqiang and Greek Prime Minister Antonis Samaras,AQSIQ Minister Zhi Shuping and ELOT Chairman and Executive Director Angelos Tolkas signed the SAC-ELOT Standardization Cooperation Agreement.The Agreement is one of the critical cooperation documents signed during Li Keqiang’s visit in Greece,encouraging China and Greece to     

Win-Win Cooperation

正The Chinese Premier Li Keqiang's recent trip to the UK has reinforced the China-UK comprehensive strategic partnership;just as the British Prime Minister David Cameron put it,"the relationship is gaining in strength,depth and understanding"after a bucket of business deals being inked worth more than 30 billion US dollars.From the first agreement signing in 2004 to the new agreement of mutual standards recognition and adoption in