This conference proceedings contains 35 papers. It provides an overview of the dynamic progress being made in laser radar, with topics including detection, tracking, and guidance;solid state laser radar systems;range ...
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ISBN:
(纸本)0819407798
This conference proceedings contains 35 papers. It provides an overview of the dynamic progress being made in laser radar, with topics including detection, tracking, and guidance;solid state laser radar systems;range and velocity measurements;imaging applications;and wind sounding and remote sensing.
Diode lasers offer the potential of a low-cost, compact, and efficient source for imaging laser radar applications. However, to date, there are no commercially available high-power cw sources that can be collimated in...
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ISBN:
(纸本)0819407798
Diode lasers offer the potential of a low-cost, compact, and efficient source for imaging laser radar applications. However, to date, there are no commercially available high-power cw sources that can be collimated into a low divergence beam. In this paper, we show that it is possible to use surface emitting distributed feedback diode laser arrays in conjunction with micro-optics lens arrays to assemble a laser source with approximately 10 W output power and sub-milliradian beam divergence.
Hughes Danbury Optical systems (HDOS) has developed and flight tested a unique GaAs laser radar which produces high resolution 3-D imagery of the terrain beneath the aircraft. This line scanner is described along with...
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ISBN:
(纸本)0819407798
Hughes Danbury Optical systems (HDOS) has developed and flight tested a unique GaAs laser radar which produces high resolution 3-D imagery of the terrain beneath the aircraft. This line scanner is described along with the design parameters used to develop the current model. Improvements planned for the sensor include the addition of an IR channel which would be used to provide passive imagery for target cueing. This would have the effect of reducing the system processing requirements while simultaneously increasing the probability of detection and reducing the false alarm performance.
This paper will discuss two candidate sensor suites for a guided projectile. The projectile employs a millimeter wave seeker for terminal guidance to a target. In addition, various complements of gyroscopes, accelerom...
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The Hughes Imaging Laser Radar sensor gathers separate range and intensity data channels at 2 megabytes/second per channel. Commercially available SIMD parallel processors provide the horsepower to process this data i...
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ISBN:
(纸本)0819407798
The Hughes Imaging Laser Radar sensor gathers separate range and intensity data channels at 2 megabytes/second per channel. Commercially available SIMD parallel processors provide the horsepower to process this data in real-time. In this paper we discuss a fairly generic hardware/software architecture to process this data using an APx- 128 SIMD processor for each channel and a 386-based host that provides control of an image display and the recording of features. The expandability and affordability of this approach makes our design applicable to a wide variety of similar problems.
This conference proceedings contains 56 papers on advances in process control systems and instrumentation. Topics discussed include the benefits of integrated plant control, the impact of OSHA regulations on control a...
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ISBN:
(纸本)1556173857
This conference proceedings contains 56 papers on advances in process control systems and instrumentation. Topics discussed include the benefits of integrated plant control, the impact of OSHA regulations on control and safety systems, instrumentation and control applications in oil and gas production, plant commissioning and startup, instrument installation design and constructability, open systems in process manufacturing, sensor technology and development, compliance of control systems with Good Manufacturing Practices, advanced power plant control systems and man/machine interfaces, neural network applications for power plant control systems, pulp and paper mill control systems, water and wastewater treatment plant control systems, instrumentation for cryogenic systems, advances in process analyzer technology, sampling for chemical analysis, monitoring toxic gaseous emissions for compliance with the Clean Air Act, colorimetric methods of process control, and novel analyzer systems for process monitoring.
Computer-assisted interpretation of sensor data in a modern diagnostic system brings together various technologies, including signal and image processing, pattern recognition, and artificial intelligence. In both biom...
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Computer-assisted interpretation of sensor data in a modern diagnostic system brings together various technologies, including signal and image processing, pattern recognition, and artificial intelligence. In both biomedical and advanced manufacturing applications the complexity of the processes under investigation renders the task of automated classification difficult. A method for reasoning in the presence of uncertainty in essential to accomplishing this task effectively. Recently the theory of fuzzy sets and related uncertainty calculi have emerged as viable alternatives to traditional probabilistic approaches in some applications. This paper is a survey of methods employing some concept of fuzziness or degree of membership in the solution of pattern classification problems, and the potential role of these methods in diagnostic systems.
In this paper two engine subsystems, digital engine speed display and advance ignition system, are simulated and discussed to provide the understanding and insight necessities to design a microcontroller-based electro...
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sensor simulation codes, such as SPARTA's optical sensor simulation (sensorSIM) and the Defense Laser-Target Signatures (DELTAS) Code, require a high fidelity computer model capable of simulating any type of detec...
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ISBN:
(纸本)0819407798
sensor simulation codes, such as SPARTA's optical sensor simulation (sensorSIM) and the Defense Laser-Target Signatures (DELTAS) Code, require a high fidelity computer model capable of simulating any type of detection system that might be employed in an opticalsensor system. Detection system models for these codes must additionally satisfy sometimes conflicting needs of a diverse user community. Although current detection models in these codes are accurate and easy to use, they are limited in the types of detection systems that they can simulate and lack the flexibility to incorporate new detection schemes that are still under development or that may be developed in the future. The authors are developing a comprehensive model of optical detection systems that can be integrated into signature simulation codes such as sensorSIM and DELTAS. This model uses a radically different approach to simulate the performance of all existing and future detection systems. The model features a hierarchical structure that directly corresponds to the design of a detection system. The first (top) level of this hierarchy represents the overall detection system as an assembly of individual components;the components are represented bythe second level. Elements of some components, such as image intensifier tubes, may be represented by a third level. At the lowest level of the hierarchy, which may vary from component to component, a sequence of mathematical operations describes the behavior of each component or element. The model simulates a single instance of each random event using a cascaded noise model that is consistent with the philosophy of the sensorSIM and DELTAS codes. Each detection system is defined by standard text files that follow an intuitive and efficient syntax corresponding to the hierarchy of the detection system model. This input structure allows components to be defined once and incorporated in many detection systems, minimizing the library maintenance burden, and also
Fiber-optic Rotation sensors (FORS) are all solid-state devices capable of measuring rotations and rotation rates in inertial space. They are intended to eventually serve as replacements for spinning mass systems and ...
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ISBN:
(纸本)0877033544
Fiber-optic Rotation sensors (FORS) are all solid-state devices capable of measuring rotations and rotation rates in inertial space. They are intended to eventually serve as replacements for spinning mass systems and ring laser gyros in applications that place a premium on long lifetime, low-weight, low-power consumption and/or reduced costs. As such, they should prove particularly well-suited to space applications such as NASA's planetary programs. The Jet Propulsion Laboratory (JPL) and Draper Laboratory (Draper), under NASA sponsorship, are in the process of developing a FORS with the intent of using it on the Comet Rendezvous/Asteroid Flyby (CRAF) and the Saturn-orbiting Cassini missions. Brassboard FORS have demonstrated the performance levels required for precision pointing and control of spacecraft, platforms, telescopes and advanced transportation systems. Preliminary tests of FORS solid-state opto-electronic components indicate that they are capable of meeting the reliability characteristics required for space usage. This paper describes the mission, Inertial Reference Unit (IRU) requirements, FORS instrument, and opto-electronic components requirements. An overview of the design of the FORS, as well as the results of overall instrument performance tests will be presented.
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