摘要:
A personal object or obstacle detector apparatus with enhanced stereo imaging capability includes a sonar system having dual receivers with field lobes positioned based on psychoacoustic considerations such as interaural intensity difference (IID) and interaural time difference (ITD). Receiver field pattern shapes and directions are selected to match the natural IID and ITD associated with human hearing. In one embodiment, dual receivers are used with a common transmitter while another embodiment utilizes two transmitter/receiver pairs with the transmitter and receiver collocated.
摘要:
A system and method for wide angle imaging create a high resolution image using a convex primary mirror concentrically positioned relative to a concave secondary mirror and one or more detectors spherically juxtaposed. The radii of the primary and secondary mirrors are related by the square of the "golden ratio" to reduce low order aberrations. A fiber optic faceplate coupled to each detector corrects field curvature of the image which may then be detected with a conventional flat detector, such as a CCD camera.
摘要:
A wearable universal user interface device is provided for interacting with a variety of electronic apparatus. The interface device includes various sensors, such as a temperature sensor, pressure sensor, and a two-dimensional quadrant force sensor. The interface device also includes processing circuitry, a wireless transmitter, and an optional receiver. In the preferred embodiment, the interface device is in the form of a ring adapted to be worn on the finger of a user. The device is operated by the wearer's fingers and thumb. Preferably, the interface device includes an internally mounted pressure sensor and an externally mounted two-dimensional force sensor. The body of the ring itself serves as an omnidirectional loop antenna for transmission and reception of signals. Representative applications of the interface device include use as a wireless computer mouse, a remote controller for a television, stereo, VCR, or the like.
摘要:
A system and method for wide angle imaging create a high resolution image using a convex primary mirror concentrically positioned relative to a concave secondary mirror and one or more detectors spherically juxtaposed. The radii of the primary and secondary mirrors are related by the square of the "golden ratio" to reduce low order aberrations. A fiber optic faceplate coupled to each detector corrects field curvature of the image which may then be detected with a conventional flat detector, such as a CCD camera.
摘要:
A personal object or obstacle detector apparatus comprises a continuous transmission frequency modulation (CTFM) ranging system and an audio output device. The CTFM ranging system transmits a frequency-swept pressure wave, receives a reflected frequency-swept pressure wave from at least one object, and forms an audio signal based upon a frequency difference between the frequency-swept pressure wave and the reflected frequency-swept pressure wave the audio signal having an amplitude dependent upon size of the object. The audio output device produces an acoustic pressure wave in dependence upon the audio signal. In a preferred embodiment, the acoustic pressure wave contains separate tones for each of the objects detected, wherein each tone has a pitch dependent upon the distance from the CTFM ranging system to the corresponding object. Another embodiment utilizes a pair of CTFM ranging systems to produce a stereo auditory map of objects and obstacles.