Abstract: Self contained radio transmitting state estimator modules are mounted on power conductors on both sides of power transformers in electrical substations and on power conductors at various places along electrical transmission lines. They are electrically isolated from ground and all other conductors. These modules are capable of measuring current, voltage, frequency and power factor (or the fourier components thereof) the temperature of the conductor, and the temperature of the ambient air. The modules transmit these parameters to local receivers. The receivers are connected by an appropriate data transmission link, to a power control center which allows determination of the state of the power system. The module measures the Fourier components of voltage and current over a number of cycles and transmits the components to the local receiver.
Abstract: In such an operation mode that the vehicle is accelerated upon turning-on of the switch and, when the vehicle has reached a given vehicle speed, the switch is turned off to memorize the vehicle speed at that time for effecting constant-speed control at the memorized vehicle speed, a throttle valve is returned to apply the engine brake after turning-off of the switch. If at least one of several given conditions is satisfied, adjustment of opening degree of the throttle valve is started so as to maintain the current vehicle speed at the goal vehicle speed. This makes smaller overshoot of the controlled vehicle speed caused by a response deley of the vehicle. The given condition may be related to differences between current speed and set speed, elapsed time, elapsed distance, or degree of acceleration.
Abstract: In a navigator for vehicles, a distance sensor detects a distance travelled by a vehicle and a heading sensor detects a direction of travel of the vehicle. In response to the detection signals from the sensors a microcomputer computes the present position of the vehicle and generates a position signal. In accordance with the position signal from the microcomputer and the selection of display selection switches a display tube gives a graphic display of a road map or a character display of a road map data.
Abstract: A digital frequency locked loop is disclosed for use with programmable signal processing apparatus wherein frequency locking is desired from staggered data samples. Sampling means are provided for sampling an input signal, at instants determined by the sampling signal, to provide N data signals from M cycles of the input signal wherein each data signal represents the magnitude of the input signal at the sampling instant. Signal processing means are provided for performing a unique approximation to the optimal mean square estimation analysis to provide a frequency deviation signal which is proportional to the difference in frequency between the sampling and input signals. The frequency deviation signal is used to modulate the period of the sampling signal such that the frequency of the sampling signal is maintained in constant proportion to the frequency of the input signal.
Abstract: Apparatus and method for determining transient temperature and stress distributions in turbomachines and system components as a function of operating conditions where direct measurements on the rotating components are prevented. The apparatus includes a microprocessor which computes temperature and stress distributions in real time for components of complex shapes. The apparatus employs a memory containing a set of standard temperature distributions under particular operating conditions and the temperature stresses in the component are estimated on the basis of the closest temperature distributions in the set. The apparatus can be embodied as an on-board in-flight LCF monitor of aircraft engine rotors or as an LCF monitor of a turbomachine for power generation such as a stationary turbine generating unit.
Abstract: A display control apparatus has a memory for storing luminance data corresponding to a plurality of color elements for color display, the luminance data being used as display data of dots to be displayed at a raster scan type display unit, a circuit for reading out the luminance data corresponding to the respective color elements of given dots for dot display at the display unit, and a video signal converter for enabling/disabling at least one-dot display intervals a binary video signal which is to be transmitted to the display unit and corresponds to a color element when specific luminance data of this color element read out from the memory by the readout circuit has a given level for an interval corresponding to at least two dots along a raster direction, and for transmitting the luminance data to the display unit in accordance with the enable/disabled state of the binary video signal.
Abstract: A computer controlled image forming apparatus for making quantitative evaluations relating to an image of a subject which is programmed to control a plurality of associated electrically addressable indicia the images of which are viewable superimposed upon the image of the subject. The device is usable for measuring distances, areas, angles, curves, and the like, and is controllable by an operator who, by means of first signals input into the computer, selectively addresses particular members of the plurality of indicia by means of second signals output by the computer and conditioned by interface circuitry in a manner to quantitatively relate the addressed indicia to the image of the subject. Subsequently, the computer interprets the finally addressed indicia in terms of a physical parameter exhibited by the image of the subject for which the computer has been programmed and outputs results of the computations, in the form of third signals, or display to the operator.
Abstract: A device for measuring the volume of flowing liquid with temperature compensation includes a device for generating a volume signal, a device for detecting the temperature of the fluid to generate a temperature signal, and an electronic computer for receiving the volume and temperature signals to calculate a compensated volume. A device is provided for setting the value of the specific gravity of the liquid so that the computer, which is stored with coefficients for compensating the volume of various liquids each having the respective specific gravity at a standard temperature, the specific gravity being varied depending on the liquid temperature, selects one of the coefficients with reference to the set specific gravity value and the temperature value and calculates the compensated volume per volume signal and outputs the latter to a displaying device.
Abstract: A conductor clad board from which the printed circuit board is produced is operatively retained for manipulation in a plotter controlled by a computer. Etchant-resist material is laid down in a printed circuit conductor pattern on at least one conductive sheet of the board by a marking instrument operatively manipulated by the plotter. The computer controls the application of the resist material in accordance with printed circuit board computer aided design information in the computer memory. Both conductive sheets of the board can be marked with resist after establishing the orientation of the board so the printed circuit patterns on opposite sides of the board occupy a predetermined aligned relationship. After etching, the board is again retained in the plotter and holes are drilled through the board by using drill apparatus operatively adapted for use and manipulation by the plotter.
Abstract: A method and a device for distance protection and location of a fault point on a transmission line based on voltage waves emitted from a measuring point towards a fault point and corresponding waves reflected from a fault point, which are included in a travelling wave model of a transmission line. At certain regular intervals, a measurement is effected of the instantaneous values of the current and the voltage at an end point of the transmission line, for example at a station. Based on these measured values, and with the aid of the travelling wave model, it is possible to calculate the voltage at a number of control points along the transmission line. If the line is energized and the calculated control voltages at two control points have different signs during a time longer than a time corresponding to normal phase difference between the two voltages, there is a fault on the line between these points.
Abstract: A process control is provided for continuously monitoring and adjusting an apparatus for manufacturing discrete workpieces. The system measures a current workpiece by taking fifteen readings and deleting the highest five and lowest five readings and averaging the center five readings. This value is then used for sorting the workpiece in accordance with preset tolerance limits. The measured average value is also compared with an expected value which the system has computed and stored. An adjustment value is then calculated based on a comparison of the measured dimension of the current workpiece and a measured dimension of the last-produced workpiece and the expected value for the current workpiece. The apparatus is then adjusted in accordance with the computed adjustment value.
Abstract: Target or scene tracking capability is provided by a dual mode video tracker which includes both a correlation processor (30) and a centroid processor (32) for processing incoming video signals representing the target scene (20) and for generating tracking error signals over an entire video frame or a selected mode thereof. A microcomputer (26) controls the operation of the correlation and centroid processors, as well as a preprocessor (28) which preconditions the incoming video signals. The tracker operates in any of several modes in which the correlation and centroid processors function either independently or cooperatively with each other. The correlation processor generates a reference map in pixel format which is used to produce azimuth and elevation optimal weighting values for each pixel in the field-of-view. The reference map is recursively updated. The track gate for the correlation processor is automatically sized using a gradient function derived from the optimal weighting values.
April 1, 1985
Date of Patent:
January 12, 1988
Hughes Aircraft Company
Arthur K. Rue, Gordon T. Pope, Earl L. Emerson
Abstract: A method of discriminating between linear and nonlinear regions of measured data is based upon two hypotheses, one of which is a hypothesis that a response is merely a result of inherent randomness and the other of which is a hypothesis that the response is a result of a true nonlinear change greater than a value M. It is also based upon a relative cost between accepting the latter hypothesis when the former is true versus accepting the former hypothesis when the latter is true. A resulting probabilistic criterion (M/2)+(.sigma..sup.2 /M) [1n(P.sub.H0 /P.sub.H1)C] is graphically implemented for deriving offset values which can be used in a specific embodiment to construct tabular values defining linear/nonlinear regions from a presumed hypothetical straight line response.
Abstract: The temperature of a serviced area or zone is cost efficiently maintained within a prescribed range by establishing a prescribed fan cycle period, during which period the fan is both operative and non-operative at variable intervals. The temperature of the serviced area is monitored and averaged for each given cycle. The fan run time is then determined by a CPU for the succeeding cycle dependent upon the difference between the average measured temperature and a prescribed balance temperature.
Abstract: In an electron beam system in which the beam is exposed in selected prescribed patterns on a target surface, stored pattern data specifies the location of the pattern as coordinates on the target plane of a reference point in the pattern, specifies the shape of the pattern as a code identifying one of several permissible shapes, and specifies the size of the pattern as dimensions of first and second pattern dimensions in the target plane. In exposing each pattern, the data is: modified to provide the selected pattern in the desired size; modified to determine the maximum beam size for the selected pattern; dynamically fragmented into individual beam flashes; and examined to determine the beam spot size, shape and position for each flash. All patterns are generally designated as trapezoids, with a triangle considered as a trapezoid having one side of zero length, a rectangle considered as a trapezoid having four right angles, etc.
June 28, 1985
Date of Patent:
January 5, 1988
Control Data Corporation
Timothy I. Fillion, Marc L. Bergeron, Andrey Varpahovsky
Abstract: A five stage background filter circuit 10 is disclosed which is capable of responding to background radiation changes at speeds which are from one to two orders of magnitude faster than conventional prior filters. The invention utilizes a cross scan multiplexing technique in combination with filter circuitry depicted in schematic overview in FIG. 1. Circuit 10 includes a differential amplifier 12, a sample and hold device 14, a responsivity corrector 16, a recursive filter 18, and a background subtractor 20. Output signals 11 from a focal plane array of detectors (shown in FIG. 3) are passed through impedance matching input resistors 12a,b to an amplifier. A sample and hold circuit 14a cyclically selects and stores a signal received from first stage 12. The detector outputs are then normalized by responsivity corrector stage 16 which employs a digital-to-analog converter 16a and random access memory 16c.
February 18, 1986
Date of Patent:
January 5, 1988
Hughes Aircraft Company
Edward L. Gussin, Richard E. Burney, J. Brian Murphy, Carl G. Pfeiffer, Richard L. Hedden
Abstract: A computer management manufacturing monitoring system for monitors the operation of a manufacturing process. The input section of the system is coupled to a plurality of sensors for monitoring the states of such sensors. A logging program periodically reads the states of various sensors and stores information relating to each such sensor state in a data base. The stored data includes both direct sensor readings and as derived sensor information calculated from readings of the states of certain sensors. The operation of the logging program is predicated on a logging model constructed by an operator. A database storage section stores the information received from the logging program relating to the reading of each sensor state read in a database format. A display generator causes information to be displayed from the database on a display screen.
Abstract: A speed detection apparatus for detecting speed of electric equipment on the basis of a sampling interval so as to stably operate a variable speed control system connected thereto.The sampling interval is varied in accordance with an input current to be supplied to the electric equipment to compensate for different current pulsations due to different modes of operation and the torques produced at different load conditions.
Abstract: An instrument for measuring a thickness of a surface processing film on a metal includes a plurality of instruction executing keys, an enclosed recording apparatus, a terminal for connecting a probe to detect an electrical signal corresponding to the film thickness when the probe is pressed onto the metal, a circuit for converting the electrical signal obtained from the probe to a digital value indicative of the film thickness, and a circuit for arithmetically processing the digital value in accordance with instructions by the instruction executing keys. The results of the processing are outputted to the recording apparatus.