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检索条件"任意字段=Conference on Advanced Sensor Systems and Applications"

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MEMS pressure sensors for aerospace applications

MEMS pressure sensors for aerospace applications

引用

IEEE conference on Aerospace

作者： Liwei Lin Weijie Yun Department of Mechanical Engineering and Applied Mechanics University of Michigan Ann Arbor MI USA SiTek Inc. Campbell CA USA

ISBN: (纸本)0780343115

MEMS (microelectromechanical systems) pressure sensors have been designed, fabricated and characterized. The fabrication process is fully compatible with IC (integrated circuit) fabrication such that multifunctional microelectronics can be directly integrated on the same chip for advanced aerospace applications. These pressure sensors are designed based on the piezoresistive sensing principle on surface micromachined polysilicon thin diaphragms. Both square- and circular-shape diaphragms with thickness of 2 /spl mu/m and width (diameter) of 100 /spl mu/m have been designed and fabricated. Prototype pressure sensors with 100 Psi in full scale have a measured sensitivity of 0.15 mV/V/Psi and a maximum linearity error of /spl plusmn/0.1% FSS (full scale span).

关键词： Micromechanical devices sensor phenomena and characterization Fabrication Application specific integrated circuits Microelectromechanical systems sensor systems Microelectronics Piezoresistance Prototypes Pressure measurement

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GRYFFIN TALOS taut wire perimeter detection system

GRYFFIN TALOS taut wire perimeter detection system

引用

International Carnahan conference on Security Technology

作者： G. Hellard Australia

Perimeter security utilising a taut wire fence sensor system has been available for the last 30 years. There are a number of features which make such systems attractive for security applications. These include resistance to environmental affects, low nuisance alarm rate and high probability of detection. A taut wire fence constructed of barbed wire also acts as a deterrent, adding a barrier delay time to the perimeter. This paper describes a novel design for a new taut wire sensor. The mechanical design of the sensor provides a detector with superior sensitivity and robustness. The design allows for direct application of sensor wire strain through the sensor body without having to provide for a direction translation of sensor wire movement to the transducer. The electronic design of the sensor head stage provides advanced signal processing of the disturbance signal. The signal processing concept for a complete barrier is based on a distributed micro-controller design. Each sensor processor has an adaptive algorithm which customizes the signal processing of each sensor wire. Computer simulation testing using pre-logged environmental data is described.

关键词： Wire Mechanical sensors Signal processing algorithms Adaptive signal processing Security Signal design sensor systems Immune system Added delay Delay effects

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sensor for particle size and number density in an engine plume

Sensor for particle size and number density in an engine plu...

引用

IEEE conference on Aerospace

作者： R.W. Fegley D.A. Terry Engineering and Technology Northrop Grumman Military Aircraft Systems Division Pico Rivera CA USA AGS Technology LO2-224Surveillance and Battle Management Systems Northrop Grumman Corporation Melbourne FL USA

An advanced sensor is described which will allow measurement, in flight, of the size and number density of particles in an aircraft exhaust plume using a single frequency lidar system. The ratio of the extinction coefficient to the backscatter coefficient is used to determine the particle size, and the backscatter coefficient is then used to determine absolute number density. Various analytical methods are found in the literature. For example, in the case of a plume containing carbon particles with a mean particle radius covering the range from 0.01 to 10.0 micrometers, the backscatter coefficient varies over several orders of magnitude while the extinction coefficient is relatively constant. In this example we assume a constant volume density for the particles, and the size distributions have small standard deviations. To use this method, it is necessary to assume a value for the refractive index of the particles and to have a rough estimate of the expected range of particle sizes. This instrument could have additional applications such as the remote monitoring of smokestack emissions.

关键词： Engines Backscatter Extinction coefficients sensor phenomena and characterization sensor systems Density measurement Frequency measurement Particle measurements Size measurement Aircraft

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Test and evaluation of panoramic imaging security sensor for force protection and facility security

Test and evaluation of panoramic imaging security sensor for...

引用

International Carnahan conference on Security Technology

作者： D.A. Pritchard R.L. White D.G. Adams E. Krasue E.T. Fox M.D. Ladd R.E. Heintzleman P.C. Sprauer J.J. MacEachin Sandia National Laboratories Albuquerque NM USA Sandia National Laboratories Albuquerque NM US Raytheon Systems Company Mahwah NJ USA

This paper describes the design and preliminary test results of a 360-degree scanning, multispectral intrusion detection sensor. This moderate-resolution, panoramic imaging sensor is intended for exterior use at ranges from 50 to 1500 meters. This advanced Exterior sensor (AES) uses three sensing technologies (infrared, visible, and radar), separate track processors and sensor fusion to provide low false-alarm intrusion detection, tracking, and immediate visual assessment. The images from the infrared and visible detector sets and the radar range data are updated as the sensors rotate about once per second. The radar provides range data with one-meter resolution. This sensor has been designed for low-cost, easy use and rapid deployment to cover wide areas beyond, or in place of, typical perimeters, and tactical applications around fixed or temporary high-value assets. A prototype AES has been developed and preliminary test results are presented. This sensor represents a growing trend to use low-cost thermal imaging sensors, combined with other devices and advanced processing, for protection of US military forces and other national assets.

关键词： Testing Security Image sensors Force sensors Infrared detectors Radar imaging Radar tracking Optical imaging Intrusion detection sensor fusion

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Electronic noses: prospects for applications in Australian industry

Electronic noses: prospects for applications in Australian i...

引用

International conference on Knowledge-Based Intelligent Electronic systems (KES)

作者： D.C. Levy D.A. Barnett G.A. Bell Department of Electrical Engineering University of Sydney NSW Australia Centre for Chemosensory Research University of New South Wales Eveleigh NSW Australia

The term 'electronic nose' is a generic name for an analytical instrument that profiles the headspace volatiles over or around a sample. The technology is based on an array of chemical sensors whose outputs are integrated by advanced signal processing to rapidly identify complex odour mixtures. The paper gives a brief overview of the current state of the art of electronic noses and then goes on to discuss work which may lead to the development and improvement of nose instruments and their application in industries such as food manufacturing.

关键词： Electronic noses Australia Electronics industry Instruments sensor arrays Chemical technology Chemical sensors Array signal processing Food industry Manufacturing industries

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VCSEL-based micro-optical systems

VCSEL-based micro-optical systems

引用

IEEE Photonics conference (IPC)

作者： M.E. Warren J.R. Wendt W.C. Sweatt J.A. Nevers C.G. Bailey D.W. Arnold C.M. Matzke A.A. Allerman R.E. Asbill T.R. Carter S. Samora Sandia National Laboratories Albuquerque NM USA

This is a brief description of work at Sandia National Laboratories to build miniature systems that incorporate VCSELs, micro-optics and other optoelectronic components to realize sensing systems for unique applications. Miniaturization is the primary driver for these designs. The systems are fabricated with a combination of hybrid circuit assembly techniques and advanced electronic packaging technologies, including flip-chip bonding.

关键词： Vertical cavity surface emitting lasers Optical sensors Bonding Assembly systems sensor arrays Lenses Optical pumping Fluorescence Monitoring Microoptics

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Development of a bipedal humanoid robot having antagonistic driven joints and three DOF trunk

Development of a bipedal humanoid robot having antagonistic ...

引用

IEEE International Workshop on Intelligent Robots and systems (IROS)

作者： J. Yamaguchi S. Inoue D. Nishino A. Takanishi Humanoid Research Laboratory Advanced Research Institute for Science and Engineering Waseda University Shinjuku-ku Tokyo Japan Graduate School of Science and Engineering Waseda University Shinjuku-ku Tokyo Japan Department of Mechanical Engineering School of Science and Engineering Humanoid Research Laboratory Advanced Research Institute for Science and Engineering Waseda University Shinjuku-ku Tokyo Japan

The authors proposed the construction of a bipedal humanoid robot that has a head system with visual sensors, two hand-arm systems, 3-DOF trunk and antagonistic driven joints using the nonlinear spring mechanism, on the basis of WL-13. And we really designed and built it. In addition, as the first step to realize the dynamic cooperative motion of limbs and 3-DOF trunk, the authors developed the control algorithm and the simulation program that generates the trajectory of 3-DOF trunk for stable biped walking pattern even if the trajectories of upper and lower limbs are arbitrarily set for locomotion and manipulation respectively. Using this preset walking pattern with variable muscle tension references correspond to swing phase and stance phase, the authors performed walking experiment of dynamic walking forward and backward dynamic dance with 3-DOF trunk motion and carrying, on a flat level surface (1.28 s/step with a 0.15 m step length). As a result, the efficiency of our walking control algorithm and robot system was proved. In this paper, the mechanism of WABIAN and its control method are introduced.

关键词： Humanoid robots Legged locomotion sensor systems Springs Manipulator dynamics Nonlinear dynamical systems Motion control Muscles Robot control Control systems

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sensor-enhanced robotic cell collaboration using shared task error information

Sensor-enhanced robotic cell collaboration using shared task...

引用

IEEE International conference on Robotics and Automation (ICRA)

作者： M. Motegi T. Kakizaki S.-Y. Muto Human Interface Laboratories NTT Musashino Tokyo Japan

A multiple-sensor-enhanced robot collaboration system has been developed for manufacturing applications, The system consists of basic robot modules, such as for locating and trading. These modules have laser range finders and perform hybrid manufacturing tasks by working together as an advanced robotic cell. A hybrid task with uncertainties can be described by the task velocity and task error derived from the sensory and motion information on the robot modules. The modules send their bask error and waiting time to each other via a collaboration network. They also modify their given motion sets in real time based on fuzzy rules in order to improve the accuracy and efficiency of the system. An experimental study of multi-station welding showed that this collaboration results in a satisfactory trade-off between accuracy and efficiency.

关键词： Robot sensing systems Collaboration Robot kinematics Collaborative work Manufacturing Uncertainty Service robots Shape Performance evaluation Network interfaces

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Differential GPS improves domestic and international flight test and evaluation applications

Differential GPS improves domestic and international flight ...

引用

IEEE conference on Aerospace

作者： D.E. Hill K.M. Wallace Avionics Directorate Wright-Laboratory OH USA Veda Inc.orporated Lexington Park MD USA

advanced airborne sensor technology in support of Non-Cooperative Target Identification (NCTI) programs has been the subject of ongoing programs at Wright Laboratory for several years. Capitalizing on the freedom achieved via Global Position System (GPS)/Differential Global Position System (DGPS) technologies, research, development, test and evaluation (RDT&E) organizations can detach from ground-based systems and locate their operations at a multitude of suitable locations. Utilization of GPS-based position information coupled with a single combined downlink and control facility reduces the complexity and maintenance of a range system while increasing its reliability. Establishing a transportable system further frees the experimenter to deploy to a variety of locations as required under short notice. GPS/DGPS based systems also provide a path to functions other than pure RDT&E. They may be used to provide tools for mission planning, performance monitoring, fault diagnosis, DIS/HLA and other virtual theater platforms. Mission rehearsals can take place in a virtual environment, and the results or expected outcomes integrated into actual exercises via modifications to data sources and operational mode(s). The end product is a powerful, flexible, fully mobile testbed fully supporting RDT&E requirements for Wright Laboratories, as well as other U.S. and foreign research organizations. Termed the Mobile advanced Range Data System (ARDS) Control Station (MACS), the system has established a track record as an essential enabling technology for current test and evaluation applications. MACS is expected to have a cost-effective impact for future flight test applications as well.

关键词： Global Positioning System Military aircraft System testing Target tracking Research and development Downlink Control systems Laboratories Aerospace electronics Area measurement

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Mobile robot navigation based on optimal via-point selection method

Mobile robot navigation based on optimal via-point selection...

引用

IEEE International Workshop on Intelligent Robots and systems (IROS)

作者： Kyung-Hoon Kim Hyung Suck Cho Department of Mechanical Engineering Korea Advanced Institute of Science and Technology (KAIST) Taejon South Korea

ISBN: (纸本)0780344650

In this paper, a new navigation algorithm for wheeled mobile robots is proposed. The proposed algorithm utilizes fuzzy multi-attribute decision-making method in deciding which via-point the robot would proceed at each decision step. Via-point is defined as the local target point of robot's movement at each decision instance. We define a few fuzzy goals to achieve successful robot navigation. At each decision step, a set of the candidates of next via-point in 2D navigation space is constructed by combining various heading angles and velocities. Given the fuzzy goals, the fuzzy decision-making enables the robot to choose the optimal via-point among the candidates. Results from a series of simulations and an experiment in a real environment show the effectiveness of the proposed method.

关键词： Mobile robots Navigation Decision making Orbital robotics Force sensors Robot control Fuzzy control Fuzzy sets Robot sensing systems sensor phenomena and characterization

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