Research on the Testing Methods of Instrumental System in the Marine Magnetic Survey

Testing methods of instrumental system in the marine magnetic survey have been studied in this paper, and the feasibility of each method has been testified by the observed data. The conclusion shows that the method brought out can effectively eliminate the systematic error caused by the instrumental system, and greatly improve the surveying precision and the reliability of the survey results.

Competence investigation on insulation testing on electrosurgical instruments and needs analysis of training for Central Sterile Supply Department staff

Objective:The objective of this article is to investigate the competence of Central Sterile Supply Department(CSSD)staff in insulation testing on electrosurgical instruments,to analyze the needs of training for CSSD staff,and also to strengthen the effectiveness of monitoring the insulation testing on electrosurgical instruments for CSSD staff to provide a reference for the nursing safety training.Materials and Methods:A total of 180 CSSD staff from 36 hospitals were enrolled as the research objects and investigated using“self‑assessment questionnaire of the competence in insulation testing on electrosurgical instruments and the needs of training".Results:The overall self‑assessment score of competence in insulation testing on electrosurgical instruments for CSSD staff is 3.10±0.42,including four dimensions which are attitude,system,cognition,and skills with the scores 3.31±0.55,2.80±0.63,2.74±0.68,and 3.03±0.36,respectively.Based on the survey of training needs for CSSD staff,the top three ranked training needs are trace management record of insulation testing on electrosurgical instruments(93.89%),disposal procedures for insulation damage of electrosurgical instruments(92.78%),and adverse events caused by leakage of electrosurgical instruments(80.55%).Conclusion:The competence of insulation testing for CSSD staff is at a low level by overall.The competence of CSSD staff could be improved by analyzing the needs of training,establishing a systematic training system,and taking effective training action,thus ensuring the safety of patients and medical personnel.

Testing System Based on Virtual Instrument for Readout Circuit of Infrared Focal Plane Array

Readout integrated circuit(ROIC) is one of the most important components for hybrid-integrated infrared focal plane array(IRFPA). And it should be tested to ensure the product yield before bonding. This paper presents an on-wafer testing system based on Labview for ROIC of IRFPA. The quantitative measurement can be conducted after determining whether there is row crosstalk or not in this system. This low-cost system has the benefits of easy expansion, upgrading, and flexibility, and it has been employed in the testing of several kinds of IRFPA ROICs to measure the parameters of saturated output voltage, non-uniformity, dark noise and dynamic range, etc.

Implement of FLEX and POCSAG Pager Testing System

The synthesized signal testing equipment is widely used in the field of wireless communication. A new design method of FLEX and POCSAG page testing instrument is introduced, which is based on MCU encoder, FPGA control and digital RF. The technology of DDS and PLL is also presented.

Delay Trigger in the Application of Network Testing System

The researchers who study the local area network( LAN) eXtension for instrumentation( LXI) instrument are pursuing instrument's high-precision synchronization. In the paper,three synchronization modes were discussed which were clock synchronization, trigger synchronization, and response synchronization. Synchronous process between LXI instruments was analyzed and each time factor affecting the synchronization accuracy was discussed. On the basis of the analysis,it can be found that delay trigger plays an important role in the network testing system's synchronization. Delay trigger can produce an additional time interval to correct the difference of each LXI instrument's response time. Then,a method to realize the delay trigger was introduced. Delay time can be adjustable according to the actual demand. Finally,synchronization accuracy of network testing system can reach nanoseconds.

The Nursee-Nurse Collaboration Behavior Scale:Development and psychometric testing

Objective:To develop and test the reliability and validity of a new instrument,the Nurse eNurse Collaboration Behavior Scale(NNCBS).Background:The importance of cooperation among nurses is widely acknowledged,but is a lack of scientific studies regarding the behaviorial interactions associated with nurse enurse relationships throughout the process of patient-centered care.Therefore,there is a great need to develop a reliable scale to measure nurseenurse collaboration behavior,which is what we have generated in this study.Methods:The 46-item Nursee-Nurse Collaboration Scale was developed using a process of item design,refinement,and testing for both reliability and validity.In 2014,the 202 nurses from the International Department of Services participated in this pilot study.Cronbach's a coefficients and testeretest reliability coefficients were calculated in order to evaluate this new scale's internal consistency and stability.Exploratory factor analysis was calculated using a principal factor method with promax rotation to evaluate the scale's validity.Results:Exploratory factor analysis yielded four factors and 23 items.The overall Cronbach's a coefficient of the scale was 0.929.The item-total correlation values were overall high,ranging from 0.427 to 0.751.For the entire scale,the r values of the testeretest reliability correlations were 0.764.Conclusion:The NNCB Scale developed in this study demonstrates acceptable reliability and validity for measuring the level of NNCB.Its implementration on a broader scale would at the very least guide and promote collaborative relationships between nurses involved in patient care.It should be noted that the scale requires further psychometric testing using a larger sample size of nurses who also represent a wider diversity of backgrounds,as well as researchers who are encouraged to improve the instrument.

Research on Solar Simulation System for Test of Solar Radiation Measuring Instrument

Since traditional solar simulators are mainly applied to spacecraft and photovoltaic industry,they are not suitable for solar radiation measuring instrument test. Therefore,a deep research is carried out on solar simulators to test of solar radiation measuring instrument,so that obtain the requirements of performance test of solar radiation measuring instrument. With a combination of the requirements for national regulations of metrological verification and performance test of pyranometer and pyrheliometer,it lays emphasis on the research of design methods for improving radiation uniformity and stability of solar simulators; it also focuses on design methods of multidimensional detection workbench,which achieves different detection of solar radiation. After practical test,solar irradiation is within Φ60 mm; irradiation non-uniformity is better than ±0.8%; instability is better than ±0.72%;rotating angle precision is better than 0.09°. Then,solar simulator is used to carry out pyranometer sensitivity test,pyranometer directional response test,pyranometer tilt response test and non-linearity test for radiation instruments. Test results showthat the solar simulator meets the testing requirements of solar radiation measuring instruments.

A Method for Modeling the Virtual Instrument Automatic Test System Based on the Petri Net

Virtual instrument is playing the important role in automatic test system. This paper introduces a composition of a virtual instrument automatic test system and takes the VXIbus based a test software platform which is developed by CAT lab of the UESTC as an example. Then a method to model this system based on Petri net is proposed. Through this method, we can analyze the test task scheduling to prevent the deadlock or resources conflict. At last, this paper analyzes the feasibility of this method.

MEMS Test System Based on Virtual Instrument Technology

On account of the multiformity of MEMS devices, it is necessary to integrate with some optical measurement techniques for meeting static and dynamic unit test requirements. In this paper, an automated MEMS test system is built of some commercially available components and instruments based on virtual instrument technology. The system is integrated with stroboscopic imaging, computer micro-vision, microscopic Mirau phase shifting interferometry, and laser Doppler vibrometer, and is used for the measurement of full-view in-plane and out-of-plane geometric parameters and periodical motions and single spot out-of-plane transient motion. The system configuration and measurement methods are analyzed, and some applications of the measurement of in-plane and out-of-plane dimensions and motions were described. The measurement accuracy of in-plane dimensions and out-of-plane dimensional is better than 0.2 um and 5 nm respectively. The resolution of measuring in-plane and out-of-plane motions is better than 15 nm and 2 nm respectively.

The engine performance LabVIEW virtual instrument test system design

This paper adopts American National Instruments (NI) Company’s LabVIEW and LabVIEW RT virtual instrument softwareplatform and lots of things for this engine performance LabVIEW virtual instrument test system, such as the matched NI PCI dataCollection Card, NI SCXI signal-adjusting instrument and NI compact FieldPoint (cFP) distributed I/O real time system hardware.This system has realized multi performances’parallel test; and it can complete load, torsional moment, rotate speed, power, pressureand temperature’s real time monitoring automatically according to user’s setting; and finally through TCP/IP protocol it realizes testdata’s teleshare and telecontrol that user put on the test system. This system has such character as short development period, highuse efficiency and low cost, at the same time it has strong extensibility and reusability, so it has very high applied cost.

8th International Symposium on Test Automation & Instrumentation(ISTAI 2020) 18th-20th August 2020,Xining China

The"8th International Symposium on Test Automation and Instrumentation (ISTAI 2020)",co-sponsored by China Instrumentation&Control Society (CIS) and Beijing Information Science and Technology University,it will be held in Xining,China on August 18th-20th,2020.The symposium aims to build a platform for experts,scholars.

Research on the strain gauge mounting scheme of track wheel force measurement system based on high-speed wheel/rail relationship test rig

Purpose-This paper aims to analyze the stress and strain distribution on the track wheel web surface and study the optimal strain gauge location for force measurement system of the track wheel.Design/methodology/approach-Finite element method was employed to analyze the stress and strain distribution on the track wheel web surface under varying wheel-rail forces.Locations with minimal coupling interference between vertical and lateral forces were identified as suitable for strain gauge installation.Findings-The results show that due to the track wheel web’s unique curved shape and wheel-rail force loading mechanism,both tensile and compressive states exit on the surface of the web.When vertical force is applied,Mises stress and strain are relatively high near the inner radius of 710 mm and the outer radius of 1110mmof the web.Under lateral force,high Mises stress and strain are observed near the radius of 670mmon the inner and outer sides of the web.As the wheel-rail force application point shifts laterally toward the outer side,the Mises stress and strain near the inner radius of 710 mm of the web gradually decrease under vertical force while gradually increasing near the outer radius of 1110 mm of the web.Under lateral force,the Mises stress and strain on the surface of the web remain relatively unchanged regardless of the wheel-rail force application point.Based on the analysis of stress and strain on the surface of the web under different wheel-rail forces,the inner radius of 870 mm is recommended as the optimal mounting location of strain gauges for measuring vertical force,while the inner radius of 1143 mm is suitable for measuring lateral force.Originality/value-The research findings provide valuable insights for determining optimal strain gauge locations and designing an effective track wheel force measurement system.

基于TestStand的测试系统及应用

本文首先介绍了测试管理环境TestStand的基本概念和系统结构 ,进而介绍了基于TestStand开发测试系统的流程。在本文的最后 ,给出了这种测试系统的应用。

TESTBED在某型高炮火控软件测试中的应用

研究了黑盒功能测试和结构覆盖测试,定义了各种覆盖率指标及指出其适用范围,根据覆盖率准则的包含关系,提出了装备定型中关键软件的测试策略;针对某型高炮系统的组成与特点,设计和搭建了其火控软件配置项测试的仿真测试平台;介绍了TESTBED插装选项中两种基本覆盖率信息压缩方式,并通过插装模板和插装代码的适应性改造,建立了一种新的覆盖率信息压缩形式BYTEMAP,克服了BITMAP插装方式对被测火控软件实时性的影响,利用系统预留的串行通信端口,输出了测试的覆盖率信息,实现了嵌入式火控软件的覆盖率测试和分析;测试结果表明:根据软件规约所设计的测试用例和覆盖率分析所补充的测试用例充分有效,达到了预期的测试效果.

基于TestCenter软件平台自动测试系统设计

随着通信技术的快速发展,目前市场上无线电测试类仪器保有量快速扩充,测试任务逐年增长。面对快速增长业务,传统的人工手动测试方式已不能满足市场需求。针对以上问题,采用TestCenter软件平台,结合已有计量标准设备,适当增加接口及智能开关设备,设计了一套通用自动测试系统。经验证,该自动测试系统操作简单,运行可靠,测试速度快。

Structural optimization of precision instruments through modal analysis

In order to improve the dynamic stability of precision instruments during the design process, a compositive design method based on modal analysis of structure is proposed. With uniform boundary conditions and material characters, the results of Finite Element Analysis (FEA) vary with models. It should be checked whether the model is correctly simplified. Modal experiments can be used for such purpose. The method combines the high efficiency and agility of FEA with the reliability and accuracy of experiments, and avoids the drawbacks of FEA or experiments, such as uncertainty of FEA and high cost of experiments. Taking rotor frame structure as an example, this method is applied as follows: First the modal characters of structure are analyzed with FEA, and then the natural frequencies of the structure are tested by experiments to check the reliability of FEA method, and finally the design scheme is optimized by modifying structure parameters with confirmed FEA.

基于TestStand的音频芯片自动测量系统

为了解决利用仪器手动测量音频芯片性能效率不高,易出错的问题,根据音频芯片测试系统的原理,以LabVIEW、TestStand为平台进行系统化,模块化自动测量。本文介绍了该系统的硬件、软件构成,详细介绍软件设计及功能实现流程。运行结果表明:该系统运行稳定,精度高。

基于R-test的旋转轴安装误差辨识

数控机床几何误差测量与辨识技术对于提高机床加工精度至关重要。为了快速精确地测量机床旋转轴安装误差,对一台五轴加工中心旋转轴结构和R-test仪器测量原理进行了研究,提出了一种基于R-test仪器的数控机床旋转轴安装误差辨识方法。该方法利用最小二乘法求解方程组在约束条件下的最优化问题,将旋转轴上被测点的运动轨迹进行拟合。并根据运动轨迹确定了旋转轴在三维空间中的实际位置,最终计算出旋转轴的四项安装误差。该方法为快速测量和辨识数控机床旋转轴安装误差提供了一条有效途径。