Speed and position measurement system

Details Speed and position measurement system Speed and position measurement system

1997-12-12

2000-08-22

Buczinski, Stephen C.

Optics: measuring and testing

Range or remote distance finding

With photodetection

356 501, 356 508, 356 28, G01C 308

Patent

active

061080713

ABSTRACT:
A speed and/or position determining device for determining the speed or position of a target object includes a head-up display for simultaneously viewing both the target object and an image of information regarding the target object. An optical projection system for projecting the information image from a light emitting display to a combining sight of the head-up display passes along a short straight optical axis between the light emitting display and the combining sight. The device may also incorporate a novel method for determining the length of a time period that elapses between the time that a radiation emitter emits a pulse of radiation and the time a reflected portion of the emitted pulse of radiation is received back at the device. The novel method makes use of one or more electronic delay modules having a plurality of tap lines. An electronic state of each of the tap lines changes as a signal input to the delay module propagates through the delay module. In addition, the device may determine the pulse width of a reflected pulse of radiation, and use this information to calculate a more accurate time of flight for the pulse of radiation. The device may also incorporate a global positioning system receiver and antenna, an electronic compass, and an electronic inclinometer that are integrally mounted in the device. The device can then determine the position of a target object based on the position sensed through the global positioning system receiver and the distance, bearing, and inclination angle from the device to the target object.

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