This report presents an initial design effort for a high-speed, constant Frequency data extractor, which can be used to identify and track a particular constant frequency signal in the presence of other signals. Several factors must be included in the design considerations. The detection and acquisition of the correct signal should be accomplished at high speed to remain as close as possible to real time. Once detection has occurred, the system should generate a track-predict gate signal that enables the input line only when the real input pulse is expected. If track is lost, which happens whenever the track-predict gate and input pulse do not occur simultaneously, the initial detection method must be re-entered. The detectable frequency should be selectable over a wide range of values. Furthermore, the system should be able to detect and acquire the desired signal in the presence of large numbers of interfering signals, yet be flexible enough to adapt easily to other pulse modulation methods. Because of the above design factors as well as speed, size, and cost, a high-speed bipolar microprocessor was selected for this system implementation. A microprocessor allows most of the detection and acquisition to be accomplished in the software, thus making the system very adaptable to the host system's requirements.

International Telemetering Conference Proceedings / October 25-28, 1993 / Riviera Hotel and Convention Center, Las Vegas, Nevada / DOD flight test centers need affordable, small-format, flight-qualified digital instrumentation recording solutions to support existing and future flight testing. The Advanced Airborne Test Instrumentation System (AATIS) is today's primary data acquisition system at the Air Force Flight Test Center (AFFTC). Digital Recorder (DR) 1995 is planned to provide full support for AATIS output capabilities and satisfy initial recording requirements for the Common Airborne Instrumentation System (CAIS). The follow-on to the AATIS, the CAIS is a tri-service development to satisfy future DOD flight test data acquisition requirements. DR 2000 is planned as the future recording solution for CAIS and will be able to fully satisfy the 50 Mbps recording requirement. In the developments of DR 1995 and DR 2000, commonality and interoperability have emerged as significant issues. This paper presents an overview of these recording solutions and examines commonality and interoperability issues.

International Telemetering Conference Proceedings / October 26-29, 1998 / Town & Country Resort Hotel and Convention Center, San Diego, California / This paper describes a distributed network client-server system developed for researchers to perform real-time or near-real-time analyses on ensembles of telemetry data previously done in post-flight. The client-server software approach provides extensible computing and real-time access to data at multiple remote client sites. Researchers at remote sites can share similar information as those at the test site. The system has been used successfully in numerous commercial, academic and NASA wide aircraft flight testing.

International Telemetering Conference Proceedings / October 29-November 02, 1990 / Riviera Hotel and Convention Center, Las Vegas, Nevada / Increased data throughput demands in military and avionics systems has led to the development of an advanced, All-Bus MIL-STD-1553 Instrumentation Monitor. This paper discusses an airborne unit which acquires the information from up to 8 dual-redundant buses, and formats the data for telemetry, recording or real-time analysis according to the requirements of IRIG-106-86, Chapter 8. The ALBUS-1553 acquires all or selected 1553 messages which are formatted into IRIG-compatible serial data stream outputs. Data is time tagged to microsecond resolution. The unit selectively transmits entire or partial 1553 messages under program control. This results in reduced transmission bandwidth if prior knowledge of 1553 traffic is known. The ALBUS also encodes analog voice inputs, discrete userword inputs and multiplexed analog (overhead) inputs. The unit is provided in a ruggedized airborne housing utilizing standard ATR packaging,

International Telemetering Conference Proceedings / October 25-28, 1999 / Riviera Hotel and Convention Center, Las Vegas, Nevada / The U.S. Army Redstone Technical Test Center (RTTC) uses telemetry as a vital part of its data acquisition and analysis for electromagnetic environmental effects developmental testing of U.S. Army weapon systems. Testing in an electromagnetic environment poses several unique challenges. These challenges have resulted in the development of highly customized telemetry and data acquisition systems. This paper discusses the design and integration of past and current telemetry needs to incorporate real-time or near real-time simulations or scene generations into the testing process.

International Telemetering Conference Proceedings / October 27-30, 1997 / Riviera Hotel and Convention Center, Las Vegas, Nevada / A target missile is a unique piece of test hardware. This test tool must be highly reliable, low cost and simple and must perform any task that the developing interceptor missile planners require. The target missile must have ample power and guidance resources to put the target in a specified place in the sky at a desired time. The telemetry and measurement system for the target missile must have the same requirements as its interceptor missile but must be flexible enough to accept new requirements as they are applied to the target and its interceptor. The United States Army has tasked Coleman Aerospace to design and build this type of target missile. This paper describes and analyzes the telemetry and instrumentation system that a Hera target missile carries. This system has been flying for the past two years, has completed seven out of seven successful test flights and has accomplished all test objectives to date. The telemetry and instrumentation system is an integral part of the missile self-test system. All preflight checks and flight simulations are made with the on-board three-link telemetry system through a radio frequency (RF) link directly through the missile antenna system to a ground station antenna. If an RF transmission path is not available due to test range restrictions, a fiber-optic cable links the pulse code modulator (PCM) encoder to the receiving ground stations which include the bitsync, decommutator and recorders. With this capability, alternative testing is not limited by RF test range availability. The ground stations include two mobile stations and a factory station for all testing including preflight testing of the missile system prior to flight test launches. These three ground stations are built in a single configuration with additional equipment in the mobile units for use at remote locations. The design, fabrication, testing and utilization of these ground stations are reviewed. The telemetry system is a modification of the classical PCM system and will operate with its interceptor missile at least into the first decade from the year 2000.

ITC/USA 2015 Conference Proceedings / The Fifty-First Annual International Telemetering Conference and Technical Exhibition / October 26-29, 2015 / Bally's Hotel & Convention Center, Las Vegas, NV / Northrop Grumman Corporation's B-2 Flight Test Instrumentation team is revamping its entire Data Acquisition System (DAS) to be an Ethernet based network (EBN) system that will provide simplified wiring, higher speeds, greater capacity, and control over the data. The old system became obsolete in terms of capability and maintainability. New on-board avionic systems also demand that the Flight Test Instrumentation group (INSTR) accommodate fiber and high speed Ethernet data. In addition, the footprint and location for INSTR systems and components will be moved to remote areas. INSTR engineering selected the Teletronics Technology Corporation's Ethernet networked Data Acquisition Units (DAUs), known as MnDAUs, as the core system. Prior to the first flight utilization of the new INSTR DAS will undergo extensive lab and field testing to assure flight test effectiveness and the accuracy of all necessary data products. The goal is to acquire and employ the best system available while avoiding costly lessons.

International Telemetering Conference Proceedings / October 13-16, 1986 / Riviera Hotel, Las Vegas, Nevada / The Boeing Commercial Airplane Company presently uses an Airborne Data Analysis and Monitor System (ADAMS) to support extensive qualification testing on new and modified commercial aircraft. The ADAMS system consists of subsystems controlled by independent processors which preprocess serial PCM data, perform application-specific processing, provide graphic display of data, and manage mass storage resources. Setup and control information is passed between processors using the Ethernet protocol on a fiber optic network. Tagged data is passed between processors using a data bus with networking characteristics. During qualification tests, data are dynamically selected, analyses performed, and results recorded. Decisions to proceed or repeat tests are made in real time on the aircraft. Instrumentation in present aircraft includes up to 3700 sensors, with projections for 5750 sensors in the next generation. Concurrently, data throughput rates are increasing, and data preprocessing requirements are becoming more complex. Fairchild Weston Systems, Inc., under contract to Boeing, has developed an Acquisition Interface Assembly (AIA) which accepts multiple streams of PCM data, controls recording and playback on analog tape, performs high speed data preprocessing, and distributes the data to the other ADAMS subsystems. The AIA processes one to three streams in any of the standard IRIG PCM formats using programmable bit, frame and subframe synchronizers. Data from ARINC buses with embedded measurement labels, bus ID’s, and time tags may also be processed by the AIA. Preprocessing is accomplished by two high-performance Distributed Processing Units (DPU) operating in either pipeline or parallel environments. The DPU’s perform concatenation functions, number system conversions, engineering unit conversions, and data tagging for distribution to the ADAMS system. Time information, from either a time code generator or tape playback, may be merged with data with a 0.1 msec resolution. Control and status functions are coordinated by an embedded processor, and are accessible to other ADAMS processors via both the Ethernet interface and a local operator’s terminal. Because the AIA assembly is used in aircraft, the entire functional capability has been packaged in a 14-inch high, rack-mountable chassis with EMI shielding. The unit has been designed for high temperature, high altitude, vibrating environments. The AIA will be a key element in aircraft qualification testing at Boeing well into the next generation of airframes, and specification, design, development, and implementation of the AIA has been carried out with the significance of that fact in mind.

Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1980. / MICROFICHE COPY AVAILABLE IN ARCHIVES AND ENGINEERING. / Includes bibliographical references. / by John Newland Ratzel. / Ph.D.

Orientador: Luiz Otávio Saraiva Ferreira / Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecânica / Made available in DSpace on 2018-08-21T21:54:45Z (GMT). No. of bitstreams: 1 Martins_GabrielSoares_M.pdf: 6495887 bytes, checksum: 4a05e53032d23853568df2eca3d4ecf7 (MD5) Previous issue date: 2012 / Resumo: Medir a qualidade da água sempre foi importante para as agências governamentais, organizações científicas e a própria sociedade manterem o nível de contaminação da água em patamares que não afetem a sobrevivência de nenhum ser vivo. Rastrear de forma mais detalhada e precisa os efluentes industriais que retornam aos rios e lagos das cidades, através da instalação de diversos medidores ao longo das linhas de distribuição de água industriais, auxilia na manutenção da qualidade da água destas fontes naturais. Os medidores existentes atualmente, conhecidos por turbidímetros, são caros, o que impede o amplo monitoramento das linhas de água. O objetivo desta dissertação é a construção de um turbidímetro de baixo custo que seja capaz de auxiliar na avaliação dos efluentes industriais. O turbidímetro proposto é baseado no GLI Método 2 (Great Lake Instruments Method 2), que emprega duas técnicas de espectroscopia: a nefelometria e a turbidimetria. A contribuição dada por esta dissertação está na aplicação da técnica de modulação por amplitude de pulso com amostragem instantânea, muito utilizada em telecomunicações, com o intuito de mitigar qualquer deslocamento do sinal devido às fontes de luz do ambiente e outras interferências do circuito eletrônico. O equipamento consegue medir uma faixa de turbidez de 16 a 4000 NTU. Abaixo de 16 NTU não há precisão nas medidas devido à intensa presença de ruído no sinal nefelométrico. Apesar de não conseguir medir o nível de turbidez aceitável de água apropriada para consumo (5 NTU), considera-se a faixa de medição suficiente para se medir efluentes indústrias e monitorá-los para não que não poluam os rios e reservatórios das cidades / Abstract: Measuring water quality has always been important for government agencies; scientific organizations and society maintain the level of water contamination at levels that do not affect the survival of any living being. Track, with more details and accuracy, the industrial effluents that return to the rivers and the lakes of the cities through the installation of several meters along the water lines of industries, helps maintain water quality of the natural sources. The meters currently existing, known for turbidimeters, are expensive, which prevents the widespread monitoring of water lines. The objective of this dissertation is design a low cost turbidimeter that is able to assist in the assessment of industrial effluents. The turbidimeter proposed is based on the GLI Method 2 (Great Lake Instruments Method 2), which employs two spectroscopic techniques: nephelometry and turbidimetry. The contribution of this dissertation is in applying the technique of pulse amplitude modulation with instantaneous sampling, widely used in telecommunications, in order to mitigate any signal offset due to ambient light sources and interference from the electronic circuit. The equipment can measure a range of 16-4000 turbidity NTU. Below 16 NTU there is no accuracy in measurements because the noise interfering in the nephelometric signal. Although the equipment cannot measure the acceptable turbidity level of drinking water (5 NTU), it is considered sufficient to measure industrial effluents and track them to not pollute the rivers and reservoirs of cities / Mestrado / Mecanica dos Sólidos e Projeto Mecanico / Mestre em Engenharia Mecânica