Academic literature on the topic 'Data transmission system testing equipment industry'
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Journal articles on the topic "Data transmission system testing equipment industry"
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Mijarez, Rito, David Pascacio, Ricardo Guevara, and Joaquin Rodriguez. "Signal processing algorithm for thermal drift compensation in high-temperature down-hole instrumentation systems." Transactions of the Institute of Measurement and Control 39, no. 8 (February 17, 2016): 1161–68. http://dx.doi.org/10.1177/0142331216630360.
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Down-hole oil and gas industry requirements for measuring thermodynamic and geophysical parameters, for instance pressure, temperature, vibration and multiphase flow, are challenging. Accomplishing these necessities requires a complete signal communications chain of high-performance components and effective signal processing communication techniques to provide system reliability. Nevertheless, noise interference, cable attenuation and thermal drift of the front-end passive electronic elements can lead to poor signal-to-noise ratio (SNR) and possibly loss of the communication link. This paper describes a signal processing algorithm implemented in a bidirectional communication system that exchanges data from a down-hole high pressure and high-temperature (HPHT) measurement tool to the surface installation. The communication channel is a multi-conductor coaxial logging cable also used as a power supply transmission line. The instrumentation system consists of a proprietary down-hole measurement tool, composed of an HPHT sensor and a high-temperature digital signal processor (DSP)-based electronic device; located in the surface installation is a data-acquisition equipment. The system employs a signal processing algorithm, based on the frequency domain SNR characterization of the whole communication chain, which determines in real time the optimal carrier frequency that is automatically implemented in the selected modulation/demodulation technique. The obtained laboratory test results of the down-hole tool, using changes in temperature from 25° to 185°C, provide a firm basis for testing and evaluating the system in the field.
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Letkiewicz, Arkadiusz, Izabela Nowicka, and Ewa Kuczyńska. "Psychological Support for Drivers in Polish Police." Internal Security 10, no. 1 (November 27, 2018): 199–207. http://dx.doi.org/10.5604/01.3001.0012.7500.
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The objective of this article is to present an issue of psychological support for drivers, including drivers of emergency vehicles in the Polish Police. The publication will include preliminary results of scientific research conducted among senior management in the Polish Police — Regional Police Commanders and their deputies. Furthermore, the outline of support system concerning drivers’ psychological tests created in Polish Police will be presented. The research described in this article has been financed from the funds allocated for the implementation of a research project of Police Academy in Szczytno “Development of a system supporting psychological tests for drivers in the Police” No. DOB-BIO7/20/01/2015. The project has been developed by a scientific-industry consortium and is financed from the funds of National Centre for Research and Development under the call for proposals no. 7/2015 for development and financing projects for defence and security of the state. The project aims to produce a system supporting psychological studies of police drivers, including drivers of emergency vehicles in the Police, in accordance with current legislation. The system will be implemented in a network technology that facilitates direct cooperation with the Police Data Transmission Network, which will provide the basis for the independence and security of acquiring and storing data. The system will enable testing without additional equipment apart from an appropriately configured computer set. It will be equipped with a device to calibrate the response time measurement methodology. The system will allow assessment of intellectual ability, psychomotor skills and personality using the objective, standardized and normalized tools of proven accuracy, with reliability above 0.7, on a group of police drivers.
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Mai, Zhi Wei, Chang You Li, Ye Zhang, Feng Ying Xu, and Jian Min Li. "Application of Wireless Data Transmission Technique in Drying Equipment." Advanced Materials Research 422 (December 2011): 262–67. http://dx.doi.org/10.4028/www.scientific.net/amr.422.262.
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The application of online detection technology for grain moisture is one of the most effective ways to improve the quality of grain drying. The online detection system for grain moisture consists of three parts: online remote module of ingoing grain moisture (charging), online remote module of outgoing grain moisture (discharging), and the host controller. It adopts JZ873 wireless transparent transmission module to realize the wireless data communication among various modules, and to formulate the communication drive. In practice, this system has characteristics such as flexible use, reliable data transmission, and it is more suitable for those testing and control conditions where it is inconvenient to wiring.
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Ning, Xuefeng. "Research on Visualization System Platform of Power Equipment Based on Internet of Things." E3S Web of Conferences 276 (2021): 01017. http://dx.doi.org/10.1051/e3sconf/202127601017.
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As an important basic industry to ensure the sustainable growth of the national economy, the power industry has a large amount of power equipment information. In order to solve the widespread status information dispersion, inefficient use of status information, and low visibility in the status management of power transmission and transformation equipment. Key technologies such as multi-source heterogeneous data information fusion and visualization of power grid panoramic state information based on 3D GIS, a visualized intelligent management and control system for power transmission and transformation equipment is developed, which can comprehensively realize the status monitoring and diagnosis of power transmission and transformation equipment. As well as early warning, it provides an important means for managers and frontline employees to carry out equipment status management, so that staff can quickly obtain key information and improve work efficiency.
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Wang, Gao Ping, Yong Hong, Dong Pyo Hong, Sung Mo Yang, and Young Moon Kim. "Study on Fault Detection and Diagnosis of the Edge-Transmission Ball Mill System." Key Engineering Materials 353-358 (September 2007): 2427–30. http://dx.doi.org/10.4028/www.scientific.net/kem.353-358.2427.
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Pieces of large-scale equipment such as a ball mill system are subjected to heavy and alternate loads under the worst working conditions, which result in higher fault rates. However, since such equipment exerts important functions to the economy and industry, it isn’t recommendable to halt production in order to detect the defects under unconfirmed faults. We explore a reliable and practical fault diagnosis scheme for the ball mill system that is widely used in the building material industry. With utilizing the signal acquisition and process system of vibration, the field testing and analysis are performed based on the violent vibration of an edge-transmission Φ3×11m ball mill system. The primary diagnosis that is based on the configuration of the transmission system and foundation stiffness is found, and a feasible resolution scheme is obtained, so that the optimal and economic reform scheme is determined. The detailed scheme has been adopted by the production industry. This study that is based on the fault diagnosis of the edgetransmission ball mill system has a comprehensive significance of theory and reality. This provides a larger basis for vibration inspection and fault diagnosis in building material industries.
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Zhou, Xiao, Hai Yan Zhao, Xiao Jian Liao, and Lei Qiu. "Signal Testing System of Electronic Equipment Based on Bluetooth and LabVIEW." Advanced Materials Research 940 (June 2014): 366–69. http://dx.doi.org/10.4028/www.scientific.net/amr.940.366.
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In order to solve the problem of the routine signal measuring apparatus applied in a certain type of electronic equipment , a wireless signal testing system based on bluetooth technology and LabVIEW is proposed and designed. The hardware and software structure of the system is demonstrated. The key principle of data acquisition, wireless transmission, data processing and display are described. The wireless signal testing system is successfully applied with the advantage of high accuracy, real-time and portable.
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Yu, Ai Rong, Jun Wang, Xu Guang Ye, and Guo You Chen. "Application and Research of Instruction Serialization Technology in the Simulation Test System." Advanced Materials Research 1049-1050 (October 2014): 2049–53. http://dx.doi.org/10.4028/www.scientific.net/amr.1049-1050.2049.
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The process of converting a data structure or object state into a storable format is referred to as serialization. For the simulation of complex electromagnetic interference test environment, to evaluate the ability of the communication system, based on the semi physical simulation test environment, this paper presents a kind of instruction serialization mode based on TCP protocol as the data transmission and control scheme of multi device control, design and implementation of various types of equipment centralized monitoring framework for the realization of all kinds of network communications equipment and status data centralized testing and monitoring purposes, to achieve a data device management control process is accurate, real-time transmission.
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Kozioł, Stanisław, Eugeniusz Matras, and Andrzej Zbrowski. "Modular System for Testing the Stability and Safety of Specialised Height Rescue Vehicles." Solid State Phenomena 199 (March 2013): 55–60. http://dx.doi.org/10.4028/www.scientific.net/ssp.199.55.
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The article describes the structure and the principles of operation of the test system for the investigation of safety of height rescue equipment used by rescue services. The system is composed of a portable computer, data acquisition block and measurement modules equipped with own power supply sources and radio transmission modules. Some of the modules constitute original, mechatronic measurement devices with specific metrological properties. The system is intended particularly for accreditation tests for height rescue equipment used by Fire Brigades.
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Wang, Ying Zhi, Yi Cheng Tong, and Jia Yang. "Design of Control Terminal for Water Quality Detection Based on the Beidou Satellite Navigation System." Applied Mechanics and Materials 733 (February 2015): 666–69. http://dx.doi.org/10.4028/www.scientific.net/amm.733.666.
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The STM32F103RB single chip microcontroller as the core, and realizes the positioning and the short message transmission to the Beidou satellite navigation system module, to design the water quality detection control terminal. The actual show, control terminal design, can achieve the positioning system of water testing, acquisition, storage and transmission of sensor data. The extended application, the control terminal can be used to locate other required equipment, storage and transmission of data occasions.
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Martin Boros, Matej Kucera, Andrej Velas, and Jan Valouch. "Possibilities for Experimental Testing of Alarm Transmission Systems." Communications - Scientific letters of the University of Zilina 22, no. 2 (April 1, 2020): 123–28. http://dx.doi.org/10.26552/com.c.2020.2.123-128.
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In the current digital era, information is a basis of some systems. In the area of information, great emphasis is also placed on its security and possibilities of use. The basis of the alarm transmission system is information about the protected object, which is transmitted to the remote center of the alarm transmission system. Operators of alarm transmission system centers should be obliged to carry out regular testing of the availability of individual transmission networks. At present, there is a trend that those tests are carried out by telephone calls between the two technicians and the time of transmission of information is measured utilizing a stopwatch. To automate this process, a test facility has been created that can simulate and record the intrusion of a protected object. Initial experimental tests have ascertained whether it is possible, with the test equipment, to generate the data necessary to assess the reliability of alarm transmission systems.
Books on the topic "Data transmission system testing equipment industry"
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The triumph of Ethernet: Technological communities and the battle for the LAN standard. Stanford, Calif: Stanford University Press, 2001.
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Office, General Accounting. Year 2000 computing crisis: Compliance status of many biomedical equipment items still unknown : report to the chairman Subcommittee on Oversight and Investigations, Committee on Veterans' Affairs, House of Representatives. Washington, D.C: The Office, 1998.
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Lomena, Reid Joy-Ann, and Business Communications Co, eds. Global positioning systems: Emerging technologies and commercial applications. Norwalk, CT: Business Communications Co., 2002.
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Burg, Urs von. The Triumph of Ethernet: Technological Communities and the Battle for the LAN Standard (Innovation and Technology in the World E). Stanford Business Books, 2001.
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Burg, Urs von. The Triumph of Ethernet: Technological Communities and the Battle for the LAN Standard (Innovation and Technology in the World E). Stanford Business Books, 2001.
Find full textBook chapters on the topic "Data transmission system testing equipment industry"
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Louvros, Spiros. "Towards Unified Services in Heterogeneous Wireless Networks Based on Soft-Switch Platform." In Encyclopedia of Multimedia Technology and Networking, Second Edition, 1416–22. IGI Global, 2009. http://dx.doi.org/10.4018/978-1-60566-014-1.ch191.
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The last two decades, after the telecommunication and computer technology convergence, the world of telecommunication applications has changed dramatically. The traffic needs of the customers have moved from circuit switched applications towards packet switched applications (Cox, 1995). Data traffic, with the characteristics of information transmission in the form of packets and the bursty flow characteristics rather than constant rate, nowadays accounts for slightly more than 60% of the traffic that is transmitted over the backbone telecommunication networks (Esmailzadeh, Nakagawa, & Jones, 2003). In addition to data traffic, multimedia applications like video calls, IP TV, and multimedia messaging traffic (variable rate with real time constraints) was made possible by low cost video digitizing equipment (Houssos, Alonistioti, Merakos, Mohyeldin, Dillinger, Fahrmair, & Schoenmakers, 2003). Different Radio Access Technology (RAT) networks offer different services to their subscribers. This is a big problem for the multimedia industry since it poses certain constraints to the subscribers regarding specific technology handsets. The ideal solution might be a unified handset with a unified service subscriber identity module (SIM) card (Louvros & Iossifides, 2004). This handset should be able to access the service by any radio access network, like Global System Mobile (GSM) (Siegmund, Redl, Weber, & Oliphant, 1995), General Packet Radio System (GPRS), Universal Mobile Telecommunications System (UMTS), and IEEE802.11 standard (WiFi or WLAN) towards a common core platform. In order to achieve such a unification, the service request should be seamless to the radio access technology network and the core platform should support certain protocols to provide again seamless to the user access to the requested service. Such a platform is already designed and is known as the soft-switch solution. The idea behind the soft-switch solution is the layering of the core network management procedures (mobility management, call control, session management, charging) in such a way that the operator can support all requests as a unified routing process. Moreover the operator can deploy its core switch and transmission network based on a common backbone, designed according to the 3GPP standards on IP or ATM infrastructure, and also to be able to accommodate in the future any new radio access technology network simply and without any serious rearrangement of the existing backbone, thus eliminating cost implementation. Asynchronous Transfer Mode (ATM) technology is proposed by the telecommunication industry to accommodate multiple traffic types (packet and voice) in a high speed wire-line backbone network. Briefly, ATM is based on very fast (on the order of 2.5 Gbits/sec or higher (Q.2931 ATM Network Signaling Specification, ITU)) packet switching technology with 53 byte long packets called cells being transmitted through wireline networks running usually on fiber optical equipment (Louvros, Karaboulas, Iossifides, & Kotsopoulos, 2003).
Conference papers on the topic "Data transmission system testing equipment industry"
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Rezendez, Aaron, Robert J. Marros, Khalid Farrag, and Saurav Acharya. "Reducing Excavation Damage in the Natural Gas Industry Using Real-Time GIS and Sensors." In 2018 12th International Pipeline Conference. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/ipc2018-78615.
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Excavation damage is one of the top causes of incidents in both the transmission and distribution pipeline sectors. Damage caused from insufficient notification of one-call centers or careless digging near gas pipelines can potentially result in property damage, significant injury, and/or loss of life. Pacific Gas and Electric Company (PG&E) and the Gas Technology Institute (GTI) have developed the framework for an Excavation Encroachment Notification (EEN) system to support damage prevention efforts to reduce damage from excavation activity. The research was funded by the California Energy Commission (CEC) and Operations Technology Development (OTD). The system utilizes real-time Geographic Information System (GIS) technology and cellular-connected location and motion sensors placed on excavation equipment. Controlled and field-based testing and training of machine learning algorithms were conducted to aid in characterization of excavation equipment. Additionally, a GIS system populated with pipeline information allowed operators of excavation equipment and utilities to receive an alarm and indication when equipment is adjacent to or excavating in the vicinity of a gas pipeline. More broadly, the utility stakeholder has increased situational awareness of excavation activities within its service territory with access to the real-time activity of excavation equipment through a mobile-compatible dashboard, reducing excavation damage risk and improving safety. Lastly, the project offers historical data archiving for data analysis and trend identification.
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Huibing, Zhao, Liu Huan, and Pang Dongming. "Study on Hardware-In-the-Loop Simulation System During Design and Testing of Intermittent Track-to-Train Data Transmission Equipment: BTM." In 2007 8th International Conference on Electronic Measurement and Instruments. IEEE, 2007. http://dx.doi.org/10.1109/icemi.2007.4351259.
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Shrestha, Pradhumna Lal, Michael Hempel, Sushanta Rakshit, Hamid Sharif, John Punwani, and Monique Stewart. "Performance Evaluation of Hybrid Technology Networking for Real-Time Monitoring in Freight Railroad Operations." In 2013 Joint Rail Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/jrc2013-2467.
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Traditional Wireless Sensor Network (WSN) solutions have been deemed insufficient to address the requirements of freight railroad companies to implement real-time monitoring and control of their trains, tracks and wayside equipment. With only ZigBee-based elements, the transmission capabilities of WSN devices are limited in terms of coverage range and throughput. This leads to severe delay and congestion in the network, particularly in railroad scenarios that usually require the nodes to be arranged in linear chain-like topology. In such a multi-hop topology to communicate from one end of a train to the locomotive — and due to ZigBee’s limited communication range — data needs to be transmitted using a very high number of hops and thus generates long delays and congestion problems. To overcome this drawback, we have proposed a heterogeneous multi-hop networking approach called “Hybrid Technology Networking” (HTN). In HTN we combined Wireless Local Area Network (WLAN) technologies like WiFi, which provide improved communication range and higher data rates, with low-power communication technologies like ZigBee. This significantly reduces the number of hops required to deliver data across the network and hence solves the issues of delay and congestion, while also achieving superior enery efficiency and network lifetime. The sensor nodes are logically divided into clusters and each cluster has a WiFi “gateway”. All intra-cluster communication is achieved via IEEE 802.15.4 and ZigBee protocols, while all inter-cluster communication utilizes WiFi protocol standards. To implement our proposed technology in railroad networks, we are designing hardware prototypes and simulation models to evaluate the functionality and performance of our HTN solution, which is designed around a dual network stack design governed by the HTN protocol. This ensures full compliance with IEEE and industry communication protocols for interoperability. Since no simulation tools that seamlessly combine both WSN and WLAN technologies in a single module exist, we wrote our own simulation environment using OPNET. In this paper, we have provided information of implementing the HTN protocol in OPNET and the simulation results for different scenarios relevant to railroad operations. These results will demonstrate the efficacy of our proposed system as well as provide the baseline data for testing the hardware devices in live networks. Under simulated traffic and channel conditions and device configurations, we observed a decrease of 77.27% in end-to-end delay and an increase of 69.70% in received data volume when using HTN compared to ZigBee-only multi-hop networks, simulated over 14 railcars in railroad-relevant scenarios.
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Fang, Changzheng, Jing Yang, Quan Liu, Furen Feng, and Jianyong Zuo. "Research on an Intelligent Diagnostic Equipment Suitable for Rail Traffic Braking System." In ASME 2019 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/detc2019-97600.
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Abstract In order to meet the increasing requirements of train safety in the rail transit industry, it is important for the operators to monitor the running status and health status of the train in real time. Based on train on-broad data, using big data analysis method for data mining to study the health status of trains and change rules, it will be helpful to realize the informationization and intelligence of train operation. This paper designs and introduces a smart device for the brake system of rail transit trains. It reads the required data through the train CAN Bus network, and uses the wireless transmission device DTU to remotely send the analysis result to the cloud server. The user can easily browse the train’s device status and system health analyzed by the server through the webpage anytime and anywhere, which is helpful for the health operations and management of trains. The equipment passed the relevant tests of the Changsha subway train in China, which can meet the needs of functional design.
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Mohajer, Abbas, and Eshagh Abbasi. "Development of Compression System Dynamic Simulation Code for Testing and Designing of Anti-Surge Control System." In ASME Turbo Expo 2017: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/gt2017-63212.
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As cost of damages to the compression systems in oil and gas industry can lead to significant capital cost loss and plant downtime, these valuable assets must be carefully protected to achieve a high level of production and operational reliability. In recent years, several research activities have been conducted to develop knowledge in analysis, design and optimization of compressor anti surge control system. Since, the anti-surge control testing on a full scale compressor are limited for possible consequences of failure and also the experimental facility can be expensive to set up control strategies and logics, design process often involves analyses using compression system dynamic simulation. Such Simulator enables the designer to test the new control logic and see the results before implementing it on governor system. This would increase the reliability and prevents undesirable costs resulting from practical trial and error process. Taking into account its own requirements and market demand, a high fidelity compression system dynamic simulation environment has developed by MAPNA Turbine (TUGA) to verify the anti-surge control system design and test the control logic across the all operating range of the compressor performance. Typical control scenarios that have to be considered are process control, starting and stopping, and emergency shutdowns. Having such simulator is also deemed to be essential to serve other applications during all stages of system life cycle, including but not limited to the educational tool for operators training, Site Acceptance Test (SAT) and Factory Acceptance Test (FAT) and compression plant design optimization. This research focuses on developing and validating a physics-based, modular, non-linear and one-dimensional dynamic model of a compression system: centrifugal compressor and its surrounding process equipment like scrubber, cooler, a recycle line with a control valve and check valve. The mathematical approach of the model is based on laws of conservation and the included ordinary differential equations (ODEs) which describe the system dynamics, is solved by using advanced computational method in an in-house FORTRAN code. Compressor characteristics maps generated from company compressor test bench are used to determine compressor pressure ratio and efficiency. All equipment and inlet/outlet accessories as well as test instructions follow the requirements of PTC10. The simulation within a wide range of operating conditions allows a parametric study to be performed and the optimal values of the control parameters to be selected. In order to check the validity of the model, the simulation results are then compared with experimental data taken on the company industrial compressor test facility and also with operational field measurement.
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Ratajeski, Roy. "New Generation of State Test House Equipment." In ASME 1994 Citrus Engineering Conference. American Society of Mechanical Engineers, 1994. http://dx.doi.org/10.1115/cec1994-4001.
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The new generation State Test House Brix/Acid test system, is a bold integration of open platform, personal computer and process controller instrumentation and software sub-systems designed to maximize the efficiency and utilization of existing automatic fruit analyzer hardware. The new equipment provides cost-effective, state-of-the-art hardware connectivity and software programmability. The new generation of test house equipment is a recombination of basic industry approved automatic fruit analysis, test hardware and procedures. The scope of modernization and renovation included system rewiring, incorporation of a programmable controller, a new test computer, UNIX operating system, supervisory control and data acquisition (SCADA) software, a fourth generation relational data base, communications system, and a central office host computer. A new environmental systems enclosure, new weight controllers, sample scale, Super VGA color monitor, pH and temperature sensing instrumentation, multi-form printers, and 9600 baud modems were also furnished. The method of testing for Brix and acid remained intact. Paper published with permission.
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Penney, Randy, and Hugh Flesher. "Electronic Equipment Provides Pipeline Monitoring and Protection: Applications and Limitations." In 2000 3rd International Pipeline Conference. American Society of Mechanical Engineers, 2000. http://dx.doi.org/10.1115/ipc2000-242.
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Background: Line break controls developed to date have provided the Pipeline Industry with the best protection available with proven and available technologies. There have been shortcomings in line break control due to various factors including; lack of accurate pressure history at the valve sites creating uncertainty for proper set points and limitations in the flexibility of mechanical systems. Safety: Providing pipeline safety through a line break detection system is critically important for the protection of people, property, and the environment. Safer procedures are available through continuous pipeline monitoring. Application of new technology: Increased availability of “smart” pressure sensors offers a greater degree of accuracy and control. Real time communication for data collection and system configuration (operating data, alarm status and settings, valve status) or remote operation (valve closures or line break override) provides increased control over pipeline operations. Real time information allows continuous monitoring and control. This can be provided through commercially available networks, hence providing economical and reliable methods of communication. Data acquisition through Windows based software allows the user to accumulate, sort, and analyze the data. Overview: Industry requires the ability to monitor pipeline pressures and pipeline rate of pressure change. Industry requires accuracy, reliability, and real time access for controlling valves, while minimizing the occurrences of false valve closures. The pipeline and gas transmission industry is growing, with increasing demands for safe, reliable, and efficient operating systems. New technologies are capable of providing solutions for the Pipeline Industry’s needs. Solutions: A self-contained electronic system, purpose built for the gas pipeline industry is available. The equipment continuously monitors the pipeline, measures pipeline pressures, and calculates pressure changes so that, in the case of a pipeline failure, a command is sent to the actuator to stroke the valve to the fail safe position. The equipment is accessible locally or remotely via SCADA or telemetry to acquire and analyze pipeline conditions on a real time basis, and control the actuator. The equipment is low power consumption suitable for external line power, or is available with solar panels and rechargeable batteries. The equipment continuously gathers information and provides history for pipeline operators. This allows the optimization of set points, with time delays and averaging, to minimize false trips. Windows based software enables ease of use. Owner can set alarm parameters that are protected through password authorization. Summary: Electronic Linebreak Detection Systems are able to provide the flexibility, reliability and responsiveness necessary to meet the growing safety and efficiency demands of the Pipeline Industry. Current technology provides this capability.
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Pytel, Diane, Ingrid Cotoros, and Ab Hashemi. "Wireless Temperature Sensing System Performance Characterization." In ASME/JSME 2007 Thermal Engineering Heat Transfer Summer Conference collocated with the ASME 2007 InterPACK Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/ht2007-32715.
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Current technology in temperature measurement and control requires labor-intensive and costly installation of sensors, wires and circuitry for thermal-vacuum (TVAC) testing of a system and/or post-deployment management of the thermal environment and performance. In addition, post-installation changes are often costly or impossible once the mission is initiated. Wireless thermal metrology is an enabling technology to obtain temperature history in an area of interest via wireless sensors. In a previous paper [1], we discussed the development of a wireless thermal sensing and mapping system designed for ground testing and in-flight use. We explained the basic instrument configuration for wireless temperature measurement and the analytical modeling for characterizing signal strength, transmission and quality. Laboratory test results indicated that the system is feasible and well-suited for aerospace applications. Predictive capabilities showed excellent agreement with fundamental physics of the signal propagation and the measured data. This paper complements the previous work. First, we describe the development of bounding analytical models to demonstrate the signal leakage from grounded and ungrounded Faraday cages at high frequencies. Then, we describe the development of a predictive model for performance characterization of a wireless thermal sensing system inside a Faraday Cage. Finally, we compare the test results with predictions and characterize the electromagnetic (EM) leakage from the cage when the equipment is placed in various configurations. Preliminary frequency response results assist in understanding EM leakage from the wireless equipment, and provide guidelines for optimal placement of equipment and sensors when tests in Faraday cage-like TVAC chambers are performed.
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Weller, S. D., P. Halswell, L. Johanning, T. Kosaka, H. Nakatsuka, and I. Yamamoto. "Tension-Tension Testing of a Novel Mooring Rope Construction." In ASME 2017 36th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/omae2017-61915.
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Synthetic fibre ropes are in widespread use in maritime applications ranging from lifting to temporary and permanent mooring systems for vessels, offshore equipment and platforms. The selection of synthetic ropes over conventional steel components is motivated by several key advantages including selectable axial stiffness, energy absorption (and hence load mitigation), fatigue resistance and low unit cost. The long-term use of ropes as safety critical components in potentially high dynamic loading environments necessitates that new designs are verified using stringent qualification procedures. The International Organization for Standardization (ISO) is one certification body that has produced several guidelines for the testing of synthetic ropes encompassing quasi-static and dynamic loading as well as fatigue cycling. This paper presents the results of tension-tension tests carried out to ISO 2307:2010, ISO 18692:2007(E) and ISO/TS 19336:2015(E) on three different 12-strand rope constructions manufactured by Ashimori Industry Co. Ltd from polyester and Vectran® fibres. The purpose of the tests was to characterise the performance of a novel 12-strand construction and compare this to a conventional 12-strand construction. Utilising the Dynamic Marine Component test facility (DMaC) at the University of Exeter several key performance metrics were determined including; elongation, minimum break load (MBL) and quasi-static and dynamic stiffness. During the ISO 2307:2010(E) test programme the samples were tested dry and during the ISO 18692:2007(E) and ISO/TS 19336:2015(E) test programmes the samples were fully submerged in tap water after being soaked for at least 24 hours. Two methods were used to quantify sample extension: i) an optical tracking system and ii) a draw-wire potentiometer. Axial compression fatigue and cyclic loading endurance tests were also carried out on two Vectran® samples. Further load-to-failure tests and sample analysis were also carried out by Ashimori Industry Co. Ltd. It was found that the MBL of the samples exceeded the values specified by the manufacturer (by 7.7–29.5% for the polyester samples) with failure occurring at the splices in all cases and minor abrasion noted in several locations. The measured MBL of the novel polyester Straight Strand Rope (SSR) construction was up to 16% higher than the conventional construction with increases of quasi-static and dynamic stiffness of up to 6.8%. Differences between the viscoelastic and viscoplastic behaviour of the samples were also noted. The data obtained during these tests will provide insight into the behaviour of these materials and different rope constructions which will be of use to rope manufacturers, mooring system designers in addition to offshore equipment and vessel operators.
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VanderSchee, David A. "Field Performance and Surge Testing of Centrifugal Compressors." In 1998 2nd International Pipeline Conference. American Society of Mechanical Engineers, 1998. http://dx.doi.org/10.1115/ipc1998-2126.
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In 1997 Alberta Natural Gas Co. Ltd (ANG) completed a field testing program of its centrifugal compressor fleet. Field performance and surge testing of centrifugal compressors in pipeline service was done for efficiency evaluation and to re-establish surge line control. By confirming the actual location of the surge line, surge controllers are adjusted to allow a more efficient and greater operating range resulting in fuel savings and operating flexibility. The results of this testing provides an accurate operating window for the compression equipment which is then transferred to a hydraulic analysis computer model used to provide accurate capacity estimates in support of additional gas transmission contractible volumes. As part of the surge testing, suction to impeller eye differential pressure readings (used for surge control) were evaluated to determine strength, stability and repeatability. Finally, baseline data was established to determine current compressor operating efficiencies and will be used to determine future efficiency degradation. ANG is a wholly owned subsidiary of TransCanada PipeLines, one of North America’s leading transporters of natural gas through its energy transmission businesses. ANG owns and operates the British Columbia segment of the Alberta-California pipeline system (ref Figure 1). Compression is provided at three compressor stations with eleven compressors totalling 187,000 installed ISO HP.