USA As Represented by Secretary of the Navy

John H Allen

Herbert Berke

Joseph R Owen

Denis R Breglia

David M Kotick

Joseph Portoghese

Richard C Hebb

Jeffrey D Meister

Sam T Giambarberee

Robert S Reif

An audio communications control system operates between multiple voice communications systems and a single headset worn by an operator accessing the multiple communications systems via voice transmission. The single headset includes a left speaker, a right speaker, and a microphone. The audio interface provides an electrical connection and operation with each of the voice communications systems, even though each may operate with differing equipment and signal processing. The audio interface switches discrete voice communications signals and routes them to one of the left speaker, the right speaker, and conversely from the microphone of the headset to any of selected systems.

Voice communications control system and method

A software controlled generic radar display system using a microcomputer ing a high performance graphics card that drives a high resolution color monitor which displays the radar sweep, compass rose, front panel symbology and diagnostic information. A target generator provides simulated target information that is displayed on the monitor in standard PPI format.

Generic radar display

A compensation system for use in a helmet mounted raster projection system tilizes a microprocessor to control the offset position of the raster line and frame scanners, thereby increasing the stability of the viewed scene. The microprocessor calculates control words which are fed to the scanners via digital to analog converters during the vertical sync of the raster scan. The microprocessor calculates the control words from pilot look data obtained by head and eye trackers compared to previous similar data.

Raster shifting delay compensation system

A serial to parallel data conversion interface circuit is disclosed for certing a serial word supplied by a head tracker to a parallel word so as to allow for the processing of the parallel word by a microprocessor. The head tracker supplies to the interface circuit a data ready pulse signal. The interface circuit, in response to the data ready pulse signal, supplies a data acknowledge pulse signal and a clock signal to the head tracker so as to allow the serial word from the head tracker to be transferred to the interface circuit, which then converts the serial word to a parallel word. An enable pulse signal supplied to the interface circuit effects the transfer of the parallel word from the interface circuit to the microprocessor. A reset pulse from the microprocessor then resets the interface circuit so as to allow for the transfer of another serial word from the head tracker.

Serial to parallel data conversion interface circuit

A data buffer circuit is disclosed for receiving from a serial-to-parallel ata conversion interface circuit a plurality of sixteen-bit parallel data words, for storing therein for a predetermined time period each of the parallel data words, and for transferring to a computer, so as to allow for processing by the computer, each of the parallel data words.

Data buffer circuit

A high speed digital to analog converter circuit for converting a plurality f data bytes to corresponding analog signals at very high conversion rates. A computer image generator provides in response to each clock pulse of a first clock signal a set of eight data bytes. Each set of data bytes are then latched alternatively in first storage means or second storage means. Multiplexing means alternatively samples each set of data bytes latched in said first and second storage means, and an octet of digital to analog converters then converts each set of data bytes to a corresponding set of eight analog signals. Gating means, in turn, sequentially passes each set of analog signals so as to form at its output a video information signal which may be utilized to activate an image display apparatus.

High speed digital to analog converter circuit

A computer generated image simulator is disclosed for scanning a visual target and then providing a visual image of the target which is to be displayed upon a reflective display screen such that a trainee pilot may observe the target. A head tracker which monitors the position of the trainee pilot's head, and an eye tracker which monitors the position of the trainee pilot's eyes, respectively provide head and eye orientation signals to be processed by electronic circuitry such that the target which is projected upon the reflective display screen by a helmet mounted projector will be orientated upon the screen in accordance with the orientation of the trainee pilot's head.

Computer generated image simulator

A pattern generator for simulating image generation is disclosed which pets the testing of wide angle, non-programmed visual display systems including, for example, a 360.degree. non-programmed visual display system. The program generator produces a pair of composite signals, the first of which may be utilized by an annular projector to project upon a screen a sawtooth waveform pattern, and the second of which may be utilized by the annular projector to project upon the screen a checkerboard pattern so as to facilitate the testing of wide angle visual display systems.

Pattern generator for simulating image generation

A sawtooth waveform circuit for a cathode ray tube display apparatus or the ike is disclosed for providing a sawtooth waveform signal in synchronization with the uniformly spaced pulses of a sync signal. A direct current voltage is supplied to an integrator which produces a ramp voltage. Switching means responsive to each pulse of the sync signal shorts the integrator so as to cause the ramp voltage to appear at the output of the integrator as a sawtooth waveform signal. A summing amplifier amplifies the sawtooth waveform signal, and then combines the amplified sawtooth waveform signal with a variable direct current voltage generated by a head tracker so as to provide at the output of the summing amplifier a raster drive signal.

Growing community of inventors

Winter Park, FL, United States of America

John H Allen