초록 ▼

A position tracker uses an inertial angular measurement system, for measuring orientation and linear translation of a helmet on a human head for the synthesis by a host computer of virtual, directional audio over headphones sensors mounted on the helmut, includes a roll gyro sensor, a pitch gyro sen

A position tracker uses an inertial angular measurement system, for measuring orientation and linear translation of a helmet on a human head for the synthesis by a host computer of virtual, directional audio over headphones sensors mounted on the helmut, includes a roll gyro sensor, a pitch gyro sensor, a yaw gyro sensor, an absolute roll tilt sensor coupled to a first universal signal conditioner, an absolute pitch tilt sensor coupled to a second universal signal conditioner, and an absolute yaw compensator. A data acquisition system is coupled between the sensors and the host computer for converting analog signals from the sensors into digital, angular orientation data. Each of the gyro sensors includes angular velocity detectors and solid state electronic devices connected to provide angular velocity signals at a given sample rate.

대표청구항 ▼

[ What is claimed is:] [6.] An audio system apparatus providing audio signals to a human operator, said audio signals perceived to originate from a particular fixed location around the human operator and updated upon movement of said human operator in a virtual reality environment comprising:operato

[ What is claimed is:] [6.] An audio system apparatus providing audio signals to a human operator, said audio signals perceived to originate from a particular fixed location around the human operator and updated upon movement of said human operator in a virtual reality environment comprising:operator head to aircraft sensing means including a first solid state gyrochip angular rate sensor for sensing head roll angular rate, a second solid-state gyrochip angular rate sensor for sensing head pitch angular rate and a third solid state gyrochip angular rate sensor for sensing head azimuth angular rate; said first, second and third solid-state gyrochips receiving power from two aircraft connected 12 V direct current converters and providing linear output voltage proportional to angular velocity, and first, second and third accelerometers for sensing, respectively, x, y and z coordinate system linear rate and providing linear output voltage proportional thereto;first, second and third connectors connected to outputs of said first second and third solid-state gyrochip angular rate sensors;a plurality of analog filters connected to said first second and third connectors for receiving and filtering noise from outputs of said first, second and third solid-state gyrochip angular rate sensors;operational amplifiers connected to said first, second and third analog filters and said first, second and third accelerometers, respectively, for receiving and amplifying outputs therefrom;8-channel analog-to-digital converter means for converting analog outputs from said operational amplifiers into digital form, said 8-channel analog-to-digital converter means including a data selector and a 4 MHZ clock for controlling rate of sampling outputs from said operational amplifiers;a plurality of optical couplers connected to said 8-channel analog-to-digital converter means for receiving control signals from said 8-channel analog-to-digital converter means;a fourth connector connected to said optical couplers;audio synthesizer means connected to said fourth connector for integrating digital output of said 8-channel analog-to-digital converter means into digital position data and encoding said angular position data into an audio signal; andmeans for providing said audio signal to said human operator wherein said audio signal is perceived to originate from a particular location in 3D space around the listener, said audio signal updated upon movement of said human operator.