基于虚拟仪器的某导弹测试系统自动校准设计与实现

针对基于虚拟仪器的某导弹自动测试系统,研究了通用测试接口上信号的自动校准方法和实现方案,通过采用程控开关和CPLD等技术途径,解决了大量复杂信号的测量溯源性问题,提高了计量保障工作效率.     

电磁兼容试验中亥姆霍兹线圈的设计及验证

主要研究电磁兼容中亥姆霍兹线圈低频磁场抗扰度试验技术,给出了亥姆霍兹线圈的设计研制思路。根据国际标准和实际使用情况的要求,对其结构、性能及均匀性等分别进行分析、研究和验证,并对实际使用的磁场强度根据具体标准进行了举例验证。研究成果能为电磁兼容低频磁场的测试方法与测试线圈的研制提供技术指导。     

PB下的软件项目测试信息系统的设计与实现

随着Internet技术的飞速发展 ,信息资讯的剧增 ,数据库技术已渗透到社会生活的各个领域 ,应用十分广泛。从技术的角度入手 ,本文阐述了软件项目测试信息系统的数据库设计、系统主要功能模块、重要的核心代码及模块之间的关系。     

Design methodology for production systems retrofit in SMEs

Investment in the productive systems of small and medium-sized enterprises (SMEs) in the manufacturing sector is usually quite limited. For this reason, normal practice is to apply minor developments internally or upgrade equipment as it becomes obsolete to increase their productive capacity and competitiveness at a lower cost. However, the work team, mostly made up of engineers, does not usually have experience in the use of design methodologies but also they are often familiar with the functioning of various design and quality-management tools. This paper presents a clear and simple design methodology that facilitates the development of adaptations to items of equipment that might be considered one-off products. It includes a selection of design tools that are, according to the literature on the subject, the most common and best-known among engineers, and which are also best-suited to the environment of an SME. The design methodology was validated experimentally with the upgrading of a gear-rolling tester installed on the premises of an SME in the sector. The recommended techniques and tools were satisfactory applied opening the possibilities for further application of the methodology in similar machine’s upgrades in the future.     

LED驱动电源的电磁兼容测试及整改

LED照明产品在设计过程中引入的大量非线性电子元件,会产生一定的无线电骚扰和谐波,产品的电磁兼容性能不易满足现行的国际与国家标准。该文以一照明LED灯为例,针对其较易不合格的EMC项目如电源骚扰电压和辐射骚扰的测试,分析其不合格原因,给出LED驱动电源EMC的整改思路。对整改措施的有效性和可行性分析,也可为其他电子设备的EMC整改提供参考。     

移动通信基站的辐射杂散测试

无线产品如GSM、CDMA、WCDMA的基站杂散发射测试是评价基站的电磁发射的重要指标,也是基站入网测试时的一项必不可少的测试项目。杂散发射测试的测试参数是基站壳体处的最大有效辐射功率。本文从标准ETSI300 220的定义法出发,介绍了由此衍生的其他几种杂散测试方法,并分别对这些方法的优劣进行了分析。     

机动车MEMS压力传感器电磁兼容测试

论述机动车压力传感器的电磁干扰(EMI)测试,主要进行辐射抗干扰测试和传导抗干扰测试。测试中,部分项目不符合要求,通过整改,达到测试标准。解读了相关机动车EMI测试标准,对类似机动车电子产品的测试人员和设计人员有一定参考价值。     

Design and test of an electronic nose for monitoring the air quality in the international space station

Long-term manned space missions requires a continuous monitoring of the air quality inside the spacecraft. For this scope, among several different solutions, electronic noses have been considered. On behalf of European Space Agency an electronic nose specifically designed for air quality control in closed environment is under development. After several ground experiments concerning the monitoring of a biofilter efficiency, the instrument has been tested during the ENEIDE mission on board of the International Space Station. in this paper the instrument main concepts and its performance in ground and space experiments are illustrated.     

大话呼测试模拟器开发研究

大话呼测试是在对测试网元功能测试成功结束后，对测试网元进行压力测试的一种测试方法。它通过模拟网络中某个或多个功能实体与真实测试网元的交互，在一段时间内对测试网元同时发起大量的业务处理要求，以检测测试网元在一定负载情况下的性能表现，是对测试网元性能最有效的检测方式之一。以HammerST为例，介绍了大话呼测试模拟器开发的一般过程和运行原理以及需要注意的问题，以方便大话呼测试的开发与进行。     

同轴腔体双频合路器设计与实现

提出了一种同轴腔体的双频合路器的设计,采用方腔同轴结构构成的并联带通滤波器来实现.运用综合加优化的方法(以路仿真和场仿真、优化相结合的方法)得出合路器两路滤波器的耦合和输入输出结构参数,并进行了加工制作及测量,得到的仿真和实测结果基本一致.     

气体报警器电磁兼容检测标准研究

气体报警器作为一种电子测量设备,多用于复杂的电磁环境中,易受电磁骚扰的影响。国内外针对各类电子电气产品均颁布相应的电磁兼容检测标准。国家标准GB 12358——2006和欧盟标准EN 50270-2015中气体报警器电磁兼容检测项目和检测要求有所差异,国家标准在电磁兼容检测项目、试验期间被测品工作状态以及性能判据的制定上还存在一定的不足;而欧盟标准在这几方面的规定更加详细、规范。研究内容可供相关气体报警器设计和检测人员参考。