Feasibility of Prototyping the Jominy Test Device: Corroborating for Studies and Preliminary Results of the Heating and Data Acquisition Subsystems

This work contributed to a detailed study on a better understanding of the Jominy test, adopted a proportion of study to create the Jominy test device, exhibited favorable conceptions for the development of a prototype of the device, covering the four aspects of the project, being they: test device, test body heating system, test automation and instrumentation using embedded electronics and financial analysis for the elaboration of this project in Brazil. It was possible to observe in the results that the system is efficient, simple and functional, it was possible to obtain the first test carried out in the controlled environment the temperature data in degrees centigrade, the recorded data were automatically launched in Microsoft Excel by the PLX DAQ software, making the acquisition of the data. In the matter of preparing the test device, the drawings are presented in the 3D modeling software, cost tables of the materials used for assembly in Brazil. In terms of the heating system, a heating system was adopted that uses electromagnetic induction, the cost of materials related to the heating system design was also presented. Another relevant factor that contributes to the research and improvement of the prototype is the municipality, located in the Paraiba Valley region, located in the state of São Paulo, consisting of a fertile and relevant scenario of regional, national, international and multinational statistics, thus concluding the effectiveness for the mainly metallurgical industries. The results obtained were satisfactory and consistent, when they were created for the Jominy test device with the ability to submit small pieces for testing and mainly essential in the didactic point of view for a higher education institution of engineering and technology.

AN APPLICATION OF LABVIEW ON AUTOMATIC DATA ACQUISITION AND CONTROL IN GEOTECHNICAL LABORATORY TESTS

The characteristics of USB data acquisition system NI cDAQ and its control software LabVIEW are briefed.The methods for controlling GDS pressure and volume controller by LabVIEW through serial port communication are presented.A practical data sharing method among geotechnical testing systems is illustrated.As an application case on a modified conventional soil triaxial testing system, the automatic triaxial testing system is designed by LabVIEW.Based on the control panel, the cell pressure and back pressure can be controlled independently and the testing data can be recorded automatically.

On the Study of Multi-Gas Data Acquisition System Based on PCI1711 Card

A data acquisition system for testing gas sensor array response to multi-gas is presented.The testing system is based on the character of the gas response of metal oxide semiconductor gas sensor array.The data acquisition is realized automatically through the real time controlling of the data acquisition card PCI1711.This system is highly attractive for electronic nose,which is a powerful tool for the discrimination of gases.

Design and Implementation of a High-Speed Multi-Channel Data Acquisition System

A data acquisition system （DAS） to implement high-speed, real-time and multi-channel data acquisition and store is presented. The control of the system is implemented by the combination of complex programable logic device （CPLD） and digital signal processing （DSP）, the bulk buffer of the system is implemented by the combination of CPLD, DSP, and synchronous dynamic random access memory （SDRAM）, and the data transfer is implemented by the combination of DSP, first in first out （FIFO）, universal serial bus （USB） and USB hub. The system could not only work independently in single-channel mode, but also implement high-speed real-time multi-channel data acquisition system （MCDAS） by the combination of multiple single-channels. The sampling rate and data storage capacity of each channel could reach up to 100 million sampiing per second and 256 MB respectively.

High-g Shocking Testing of the Martlet Wireless Sensing System

This article reports the latest development of a wireless sensing system,named Martlet,on high-g shock acceleration measurement.The Martlet sensing node design is based on a Texas Instruments Piccolo microcontroller,with clock frequency programmable up to 90 MHz.The high clock frequency of the microcontroller enables Martlet to support high-frequency data acquisition and high-speed onboard computation.In addition,the extensible design of the Martlet node conveniently allows incorporation of multiple sensor boards.In this study,a high-g accelerometer interface board is developed to allow Martlet to work with the selected microelectromechanical system(MEMS)high-g accelerometers.Besides low-pass and highpass filters,amplification gains are also implemented on the high-g accelerometer interface board.Laboratory impact experiments are conducted to validate the performance of the Martlet wireless sensing system with the high-g accelerometer board.The results of this study show that the performance of the wireless sensing system is comparable to the cabled system.

The Design and Implementation of Multi-user Data Sharing Platform for Remote Monitoring System Based on Virtual Instruments

Remote data monitoring system which adopts virtual instrument usually applies data sharing, acquisition and remote transmission technology via internet. It is able to finish concurrent data acquisition and processing for multi-user and multi-task and also build a personalized virtual testing environment for more people but with fewer instruments. In this paper, we＇ 11 elaborate on the design and implementation of information sharing platform through a typical example of how to build multi-user concurrent virtual testing environment based on the virtnal software LabVIEW.

AN AUTOMATED TESTING NETWORK SYSTEM FOR PAPER LABORATORY BASED ON CAN BUS

This paper presents an automated testing network system for paper laboratory based on CAN bus. The overall architecture, hardware interface and software function are discussed in detail. It is indicated through experiment that the system can collect, analyze and store the test results from the various measuring instruments in the paper lab automatically. The simple, reliable, low-cost measuring automation system will have a prosperous application in the future paper industry.

Design and prototyping of the readout electronics for the transition radiation detector in the high energy cosmic radiation detection facility

The high energy cosmic-radiation detection(HERD)facility is planned to launch in 2027 and scheduled to be installed on the China Space Station.It serves as a dark matter particle detector,a cosmic ray instrument,and an observatory for high-energy gamma rays.A transition radiation detector placed on one of its lateral sides serves dual purpose,(ⅰ)calibrating HERD's electromagnetic calorimeter in the TeV energy range,and(ⅱ)serving as an independent detector for high-energy gamma rays.In this paper,the prototype readout electronics design of the transition radiation detector is demonstrated,which aims to accurately measure the charge of the anodes using the SAMPA application specific integrated circuit chip.The electronic performance of the prototype system is evaluated in terms of noise,linearity,and resolution.Through the presented design,each electronic channel can achieve a dynamic range of 0–100 fC,the RMS noise level not exceeding 0.15 fC,and the integral nonlinearity was<0.2%.To further verify the readout electronic performance,a joint test with the detector was carried out,and the results show that the prototype system can satisfy the requirements of the detector's scientific goals.

用于数据采集器测试的时间脉冲插值分析方法

地震数据采集器时间服务精度是评价设备性能的重要指标,一般使用标准时间源输出的时间脉冲信号采样数据进行分析计算,但受仪器采样率限制,时间偏差测试分辨率不高。设计了基于一阶差分和直方图分析的脉冲信号上升沿识别、高低电位分析和时间偏差分析算法,研究使用非线性插值分析方法对地震数据采集器采集的标准时间脉冲信号进行波形升采样恢复,并基于所提算法进行实验分析和讨论,在提高地震数据采集器时间偏差测试分辨率的同时,规范了测试数据处理方法和流程。

基于LabVIEW的离合器摩擦片性能试验台测控系统设计

针对摩擦片性能试验台架测量精度低、人工操作复杂的问题,开发了一种基于LabVIEW的摩擦片性能试验台测控系统,对系统关键信号采集并进行了信号处理,基于队列状态机设计了压力和转速的自动化调节方法。台架试验结果表明:该测控系统在监控采集和控制方面均满足实际需求,提高了试验台的自动化程度,具有一定的应用价值。

基于LabVIEW和PLC的齿轮泵性能测试系统设计

对于齿轮泵的传统测试装置接线复杂、测试速度慢和不便于维护等缺点,基于S7-1200 PLC和LabVIEW软件开发平台,将测试技术与虚拟仪器技术相结合,开发了集数据采集与查询、TCP/IP通信、效率实验、生成Excel报表和数据存储等功能为一体的齿轮泵性能测试系统。从测试系统总体设计、硬件系统设计和软件系统设计3个方面进行了叙述。所开发的测试系统具有设备成本低、操作简便、易于维护和更新的优点。

一种实艇试验测控系统

为提高海上试验测试技术水平,设计一种实艇试验测控系统。采用计算机作为主控平台,以实艇推进器为研究对象,利用传感器完成对压力、扭矩等参数的采集,通过计算机屏幕显示并将数据储存在硬盘中。试验结果表明:该装置可实现对试验数据的采集与储存,为实现实艇海上试验提供条件支持,为无人艇的研究提供参考。

自然环境试验数据资源质量控制管理机制研究

目的规范和保障自然环境试验数据积累与管理,持续夯实服务装备建设的自然环境试验数据资源。方法针对自然环境因素与自然环境效应数据的常态化观测与数据积累,研究优化数据质量控制方法,提升数据的规范性、完整性、准确性。结果针对自然环境数据及环境效应基础数据预处理、存储、增删改、备份等过程,提出了包括数据采集、数据入库、数据质量控制、数据安全保密数据监控等运行管理机制。结论自然环境试验数据积累与质量控制管理机制具有科学合理性。

船舶操纵性约束模测量系统设计与分析

为解决实验室船舶操纵性约束模实验中的测量及数据分析处理技术问题,开发组建实验测量系统,推导数据分析处理方法,以期实现约束模实验的测量与数据在线分析处理;根据前期研究经验,设计了较为完善的测量硬件系统方案;为实现约束模中精确的零相位整周期测量要求,采用光电开关利用数据采集卡的硬件触发启动功能,并给出了整数周期测量的方案;利用最小二乘拟合及傅里叶分析等方法推导给出各船舶水动力导数数据处理方法;在此基础上,作为重点编写了完整的在线测量与数据在线分析程序,主要功能内部独立实现;该系统手工介入频度低,基本实现了测量的自动化,效率得到大幅提高;最后进行实际测量验证,数据的拟合结果与测量结果符合良好,验证了该系统的可靠性;同时处理结果显示船舶附加质量导数Y同船舶惯性质量很接近,而导数Y′r,N′数值很小,近于零。

采用模块化阵列的涡流探伤检测

针对工业领域的金属无损探伤中常常存在一些复杂部位,难以采用常规检测手段进行检测的问题,提出了一种优化探头结构的方法。将模块化理念引入涡流探伤中,设计并开发了一种模块化的涡流探伤系统。该涡流探伤系统将现有的互感式探头结构与电桥式探头结构相结合,结合2种结构各自的优势,以探头线圈上的感应电压值为缺陷检测的特征量,通过单片机将数据传输至以LabVIEW软件搭建的上位机并进行特征显示。测试结果表明,该系统能够检测到缺陷位置产生的感应电压值与无缺陷位置感应电压值的不同,验证了该设计的可行性,能够对金属表面缺陷进行高灵敏度的检测,实现了有效地判断金属材料缺陷位置的目的。

红外探测器振动噪声自动采集系统设计

红外探测器应用时受环境影响或外力作用会产生机械振动,从而引起振动噪声。噪声电压干扰会极大地降低探测器的跟踪能力和探测距离。因此振动噪声引起广泛关注,它是评价探测器的重要参数,也是剔除不合格探测器的重要手段。随着国内与国际市场对红外探测器的需求日益增加,传统人工监测并记录的测试方法已不能满足目前的产能需求。研究了一款支持不同规格红外探测器的振动噪声自动采集系统,主要介绍了系统设计原理、系统组成、各模块功能等。该系统的成功应用有效解决了红外探测器振动噪声测试效率低、准确率低的问题。以一款多元探测器为例,测试效率提高3倍,准确率为100%。该系统实现了振动噪声测试自动采集、无人值守,节约了人力成本。

基于国产化平台的冲击波超压测试系统设计

在当前特种测试系统国产化替代趋势下,针对传统冲击波超压测试系统存在的安全性低、进口依赖性强和自主可控性差等技术问题,提出了一款以国产复杂可编程逻辑器件(Complex Programmable Logic Device,CPLD)和ARM(Advanced RISC Machine)处理器为核心架构的冲击波超压测试系统。其中,ARM单元负责响应系统工作循环指令,CPLD则控制A/D转换模块实现采样频率高达1 MHz的数据采集和对内外触发逻辑的精确判断,数据转换结果经由外部存储器控制器(External Memory Controller,EXMC)传输并存储至eMMC存储器中,最终通过以太网传输至上位机显示。经现场试验表明,测试系统具有良好的可靠性,能够在复杂测试环境下实现对冲击波超压信号高保真采集与记录存储,为动态数据采集提供了一种切实可行的解决方案,推动了关键测试设备国产化替换进程。

自动协调加载控制及数据采集系统的自检技术研究

自动协调加载控制及数据采集系统是用于结构静强度试验载荷施加的重要设备,其准确程度是保证验证试验准确可靠、成功有效的重要因素。通过对加载系统自检技术的研究,分析并梳理出造成系统故障的原因,并设计了系统自检方案,形成了系统级→组件级的逐级排除故障方法,并将该自检方法应用于现场,证明该自检方法的正确性和适应性,能满足系统的自检要求,可以有效保障试验加载质量和安全。

悬臂式掘进机整机测试系统

介绍了在掘进装备新发展形势下,太原煤科院建立了新的悬臂式掘进机整机测试系统,该系统包括:掘进装备整机截割试验装置、可调断面模拟巷道、坚固型多通道动态数据采集装置、液压系统动态测试仪、整机运行参数分析装置以及大处风量干式除尘装置,并对每种装置的关键技术进行了叙述。形成的整机测试系统可为我国现有掘进机进行全方面的测试,为我国掘进机的发展提供了基础理论和试验支持。

64路数据采集系统在测试仪器中的应用

本文介绍了64路数据采集系统的特点,给出了采集系统控制框图;并介绍了应用该系统完成信号的采集、记录、显示、分析、输出等功能;同时介绍了64路数据采集系统电路设计方法,采集仪控制软件功能,并给出数据采集记录仪软件框图。