Improving quality certification of testing and inspection institutions

China Quality Inspection Association in joint hands with Jiangxi Metrology Association released an association standard for internal check of testing and inspection institutions while making selfdeclaration of meeting quality certification requirements(T/CAQI 176-2021&T/JMA 0002-2021),which came into effect since February 21.

Inspection and testing stressed in standards comparison and compliance action

The symposium on inspection and testing bodies in the special action on standards comparison and complianee of 10,000 enterprises of 1,000 sectors in 100 cities was held in Beijing on April 16,which was attended by more than 70 representatives from SAMR and inspection and testing bodies.

Laser ultrasonic testing for near-surface defects inspection of 316L stainless steel fabricated by laser powder bed fusion

The laser powder bed fusion(L-PBF)method of additive manufacturing(AM)is increasingly used in various industrial manufacturing fields due to its high material utilization and design freedom of parts.However,the parts produced by L-PBF usually contain such defects as crack and porosity because of the technological characteristics of L-PBF,which affect the quality of the product.Laser ultrasonic testing(LUT)is a potential technology for on-line testing of the L-PBF process.It is a non-contact and non-destructive approach based on signals from abundant waveforms with a wide frequency-band.In this study,a method of LUT for on-line inspection of L-PBF process was proposed,and a system of LUT was established approaching the actual environment of on-line detection to evaluate the method applicability for defects detection of L-PBF parts.The detection results of near-surface defects in L-PBF 316L stainless steel parts show that the crack-type defects with a sub-millimeter level within 0.5 mm depth can be identified,and accordingly,the positions and dimensions information can be acquired.The results were verified by X-ray computed tomography,which indicates that the present method exhibits great potential for on-line inspection of AM processes.

Kit of Self-Moving Units for Automatic Inspection of Marine Structures and Plants： Low Cost Unit for Inspection of Holds

All vessels and offshore units require regular inspections to prevent structural or functional damages. Periodical inspections are based on classification society＇s requirements and include both visual surveys and non-destructive test interventions, to look for structural damage, pitting, corrosion, thickness measurement, usually documented by measurements or images. Different approaches of inspection can be proposed for underwater and for dry areas, using unmanned vehicles or service robots able to improve traditional inspection methods. Several excellent proposals are today available： nevertheless, reasons of costs, operation complexity and impossibility to cover all types of inspection with a unique autonomous unit limit and conditions the applicability of automatic inspection systems. The paper is the first of a series describing the main results of a wide research activity carried out at DREAMS Lab （Laboratory of Drives and Experimental Automation for Marine Systems） of the University of Genoa. The studies are oriented to the realization of a kit of low cost and unsophisticated self-moving units, devoted to support some recursive inspections in dry areas of ships and on offshore plants as bulkheads, holds, double bottoms and ducts. The paper describes the design and prototyping of a pneumatronic unit oriented to inspection and maintenance of ship holds. Conceived to realize a portable and user-friendly tool which could take part of an ＂inspection kit＂ for the use of inspectors, able to simplify and speed up the inspection visits with and automatic generation of survey reports.

Study of ultrasonic phased array inspection imaging technology for NDT

A research about the ultrasonic phased array imaging principle from A-scan signal to B-scan image for non-destructive testing （NDT） was conducted in this paper, the ultrasonic phased array inspection imaging system used in industrial field was developed and the experiment was performed on the steel testing block by the system with 64 elements, 5 MHz phased array transducer. Experimental results show that the flaws could be accurately detected and the flaws size could be estimated from the B-scan images, and the B-scan images could clearly show the location of the flaws, but the quality of B-scan images needs to be enhanced by digital signal processing and controlling dynamic focusing for improving the image resolution.

Application of Non-Destructive Testing Technology in Quality Testing and Control of Water Conservancy Projects

In view of social development,the demand for water conservancy engineering applications continues to increase.The number and scale of water conservancy projects in China have been in a state of continuous expansion in recent years.As a result,how to achieve efficient testing and effective control of the quality of water conservancy projects has always been a topic of discussion in the field of water conservancy engineering in our country.This paper summarizes the application of non-destructive testing technology in the quality testing and control of water conservancy projects.On the basis of explaining the connotation and application advantages of non-destructive testing technology,the non-destructive testing application strategies for concrete strength,steel corrosion and shallow cracks in water conservancy projects were studied.

Load Testing in Bridge Maintenance

Highway bridges are a crucial component in road transportation networks.These bridges must be maintained according to usage requirements regularly.Test results must be considered before devising a maintenance plan.Load testing is a vital method of assessing the quality and performance of highway bridges.The outcomes of these tests facilitate the formulation of maintenance plans.This article examines the definition of load testing,its significance,and the process of execution,with the goal of providing support for bridge inspection and maintenance.

Tianjin Automotive Test Center & National Passenger Car Quality Supervision and Inspection Center——A State Testing and Universality Techniques Research Base in China

Tianiin Automotive Test Center has a test capability as well as a capability of conducting universality techniques research. With fixed assets of around RMB 76.44 million yuan and an architectural area of 11,200 sqm, test labs mainly include: auto emission test lab, full-scale vehicle crash test lab, auto safety test lab, auto lighting and view field test lab, engine test lab,

Non-Contact Stress Measurement during Tensile Testing Using an Emat for SH₀-Plate Wave and Lamb Wave

The stress on a test specimen during tensile testing is generally measured by a strain gauge. This method has some problems in that it would influence the measurement conditions of the tensile test and can evaluate only the position at which the strain gauge is attached. The acoustoelastic method is proposed as a method replacing the strain gauge method. However, an ultrasonic sensor with a piezoelectric oscillator requires a coupling medium to inject an ultrasonic wave into a solid material. This condition, due to the error factor of the stress measurement, makes it difficult for the ultrasonic sensor to move on the specimen. We then tried to develop a non-contact stress measurement system during tensile testing using an electromagnetic acoustic transducer (EMAT) with an SH0-plate wave and S0-Lamb wave. The EMAT can measure the propagation time in which the ultrasonic wave travels between a receiver and a transmitter without a coupling medium during the tensile testing and can move easily. The interval between the transmitter and the receiver is 10mm and can be moved along the parallel direction or the vertical direction of the tensile load. The transit time was measured by a cross-correlation method and converted into the stress on the test specimen using the acoustoelastic method. We confirmed that the stress measurement using an SH0-plate wave was superior to that with an S0-Lamb wave.

Application and Significance of Sample Pretreatment Technology in Food Physical and Chemical Inspection

The society promotes the continuous development of science and technology,and people’s living materials have also gradually improved.At the same time,more attention is paid to the safety performance problems such as food inspection and inspection,which is related to the people’s food first,especially the safety and quality problems of food will cause safety risks to the body.Combined with the sampling inspection process of relevant food testing departments,we attach great importance to the sampling inspection and detection of food,effectively reduce the risk of food safety,avoid the risk of social life caused by the food safety problems and the credibility of essential quality of food,explore and research from a scientific point of view.The quality control process of physical and chemical inspection and other related technology and quality control process lay the foundation of food safety guarantee for people’s living and working in peace and contentment.

我国24家检验检测机构洁净环境照度检测能力验证

目的评价我国检验检测机构对洁净环境照度的检测能力。方法回顾性分析中国食品药品检定研究院于2022年在全国范围内首次设计并组织实施的洁净环境照度能力验证项目。基于洁净环境检测的行业特点,该项目分为笔试和实际操作(简称实操)两部分。笔试部分,共3题(限时40 min完成),考察参加测试(简称参测)实验室对检测标准正确理解和掌握的程度,根据专家商议确定的评分标准评分(满分50分)。实操部分,以该院药用辅料和包装材料检定所的2台洁净工作台为现场考核样品,以参测实验室的现场测试结果考察参测实验室的仪器操作和实验水平(限时5 min完成),以Z值进行评价(︱Z︱≤2,>2~<3,≥3分别为满意、有问题、不满意)并打分(满分50分)。以笔试和实操评分之和评价参测实验室的检测能力(≥60分为合格)。结果共24家实验室参加了能力验证并按要求提交了结果报告。笔试,评分为45~50分,满分21家(87.50%)。实操,样品A,满意21家(87.50%),有问题3家(12.50%);样品B,满意23家(95.83%),有问题1家(4.17%),2个样品均无不满意的实验室。24家实验室总评分均合格。结论该次能力验证结果显示,各实验室的检测能力维持良好,但部分实验室存在对标准的理解和掌握仍有欠缺或未按校准周期对照度计进行计量等问题,建议检测人员加深对洁净环境检测标准的理解,相应机构重视仪器的校准,持续提高检测能力。

医疗器械检验检测现状及发展趋势探索

目的该文旨在迎接我国医疗器械检验检测行业的新业态和新挑战,探索行业的未来发展方向。方法在概述医疗器械检验检测行业现状的基础上,采用专家访谈和线上问卷的方式,调研40家医疗器械检验检测机构及相关企事业单位,重点关注科技创新能力和形式、行业发展瓶颈等重要问题。结果通过整理和分析调研数据,得出行业发展的5个积极趋势:完善机构整体布局,加强区域特色中心建设;完善第三方合作研究组织和第三方评审机构的准入与监管机制;鼓励科技创新,优化人才队伍,赋能检验检测技术高质量发展;构建医疗器械安全监管信息化共享平台;加强在用医疗器械设备的安全监测。创新之处采用专家访谈和循证研究的方法,获取客观可靠的数据,为行业发展趋势的研究和探索提供了有力的依据。

“岗课赛证”融通为导向的《软件测试技术》课程教学改革探究

推行“岗课赛证”综合育人,探索“岗课赛证”融通导向下的教学改革路径是培养高素质复合型技能人才的需要。以“岗课赛证”融通为导向的《软件测试技术》课程教学改革要求将岗位标准、比赛内容、证书要求融入课程。“岗课赛证”融通为导向的《软件测试技术》课程教学改革,要以“岗课赛证”融通为导向重构教学内容,建设“岗课赛证”融合的教学资源,优化教学组织形式,改革教学方法和手段,构建全过程多元化的教学评价体系,更好地提高教学质量和效果。

The Accuracy Levels of Vehicle Detectors Commonly Used in Korea Based on the Results of Quality Certification Test

The Ministry of Land, Infrastructure and Transport of Korea introduced the ITS system performance evaluation about six and a half years ago. The main purpose is to make sure that accurate and reliable real-time traffic data are collected from the ITS system installed. There are three types of performance evaluations, which are Quality Certification Test, Pre-Delivery Test and Periodic Check in Operation. In this paper the accuracy levels of vehicle detectors commonly used in Korea are analyzed based on the results of quality certification tests conducted during 2008-2012. The test items consist of volume, speed and occupancy. The analysis shows that loop detectors have the best levels of accuracy in all three test items and their levels of accuracy have been steady. Video image detectors do not have so good levels of accuracy as loop detectors, but the levels of accuracy have improved as time passes. Radar detectors do not have good levels of accuracy. However, their levels of accuracy have improved as time passes. The last vehicle detectors, geomagnetism detectors have the worst accuracy in the occupancy item.

岗课赛证融通导向下的微生物学检验课程教学实践

推进岗课赛证综合育人,成为职业院校深化“三教”改革、提高人才培养质量的重要抓手。课程团队积极开展岗课赛证融通的微生物学检验课程教学实践,对接岗位任务,重构教学框架;以赛促课,提升学生职业综合素质;以证融课,优化教学资源,以学生为中心开展混合式教学;在教学过程中贯穿课程思政,使学生德技并修;强化全过程多维度评价。实践表明,岗课赛证融通导向下的微生物学检验教学能有效提高学生学习参与度和学习成效,值得推广应用。

标准—检测—认证体系支撑防汛抗旱产品行业高质量发展的思考

标准、检验检测和认证作为国家质量基础设施的重要组成,对产业升级、技术创新和质量提升有重要作用,已经在我国消防和环保等诸多行业发挥了重要作用。但是防汛抗旱产品领域尚未建立起成熟的标准—检测—认证体系。我国防汛抗旱产品具有种类多、类型杂、涉及行业广的特点,为规范防汛抗旱产品市场,促进防汛抗旱产品行业高质量发展,在简要分析国内外防汛抗旱领域标准—检测—认证制度基础上,针对我国防汛抗旱产品行业发展现状,提出了在防汛抗旱产品领域建设标准—检测—认证体系的相关建议。

2023年版《检验检测机构资质认定评审准则》变化解析

为了尽快掌握2023年版《检验检测机构资质认定评审准则》(以下简称“新版《准则》”)的新变化和新要求,对其变化内容进行了解析。新版《准则》共含4个章节和4个附件,在框架结构、章节内容等方面有了新的变化。调整后的框架结构更加严谨、完整;新增章节对资质认定的评审方式与程序进行了详细规定;调整章节对9个条款内容进行了删除、调整和补充,在组织机构、设备设施及管理体系等方面提出了更加严格的要求;新增了4个附件,包括现场评审、书面审查和远程评审3个工作程序和1套审查表,评审和审查更规范。这些变化表明新版《准则》要求更严格、程序更规范、记录更具体。本文为有关检验检测机构尽快完善管理体系文件,确保资质认定工作的顺利实施提供了参考。

完善实验动物废物处置质量管理体系的思考:以中国食品药品检定研究院为例

科技发展是推动人类社会前进的巨大动力,而实验动物资源是生命科学、医药等领域科技发展的条件保障。但在开展医药研发、检验检测等实验过程中,使用实验动物产生的废物也为城市管理带来了新的考验。废物的分类、回收、有效利用和生物安全危害等问题接踵而至,对法规、标准、规范等的制定提出了与时俱进的要求。质量管理体系建设是检验检测机构管理的地基和框架,具备较强的操作性和检查性,可以不断提升管理水平,加强基础管理的稳定性。随着各层级新的管理办法出台,很多单位现行的质量管理体系内关于实验动物废物管理的相关内容欠妥,存在未明确非医疗机构实验动物废物处置流程、实验动物废物分类不准确、不同分类的废物未能按照不同方式处置等问题。本文针对目前存在的问题,梳理了中国食品药品检定研究院质量管理体系需要增加或者删改的流程,并制订了现行有效的标准作业流程,在如何加强监督管理方面提出了切实可行的措施,并开创性地把6S管理内容纳入质量管理体系中。因此,针对实验动物废物的管理应从完善质量管理体系的角度出发,从源头做好废物分类和管理,有效控制生物危害,最大限度地减少环境污染,为可持续发展创造条件。

钢筋混凝土结构移动式精准检测技术开发

无损检测技术是一种在不损害材料及结构服役性能的前提下,对其性质进行评估和测量的检测技术。然而,随着无损检测技术的发展和实践,结构内部的复杂损伤检测缺乏多层次精准性成为该领域的难点和核心问题。该文旨在结合国内外的研究成果,对无损检测技术的发展、分类和挑战进行梳理和分析,并在此基础上,介绍作者研究团队建立的一套由宏观到细观,再到内部的全面精准检测系统研究成果。针对表面宏观识别与细观定量识别,作者团队开发了表观病害视觉检测技术,包括构建的空间基准点自动追踪融合和亚像素级病害分割的全景图像快速拼接及表观病害厘米级定位方法,以及提出的全景图像中0.05 mm~0.2 mm多尺寸微细裂缝同步识别及真伪判别的人工智能算法。针对结构内部损伤识别,作者团队首创了智能变频敲击声波扫描及各类损伤精准识别新原理,发明建立了自适应激励分布移动敲击声波的损伤检测评估理论方法、声波及声纹图像特征人工智能算法及智能装备关键技术。经过实验验证,裂缝检测中宽度为0.05 mm时最大深度可达40 mm,剥离检测中最大深度可达400 mm,最小识别范围为50 mm。

常州市检验检测行业发展现状及策略探析

检验检测行业隶属于科技服务业,被誉为“工业之眼”,是国家质量基础设施的重要组成部分。为助力常州市检验检测行业高质量发展,本文基于调研走访结果,分析了常州市检验检测行业发展现状,提出行业高质量发展对策建议,助力本土检验检测服务业做优做强。