HAND-HELD DISTANCE-MEASUREMENT APPARATUS AND SYSTEM

The present invention relates to a portable, hand-held distance-measurement apparatus utilizing a laser range finder (100). The distance-measurement apparatus executes a number of distance-measurement cycles. In each cycle, a capacitor (208) begins charging at approximately the same time that a ligh...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	HINES, ROBIN H, KORBA, ANTHONY R, GLASSCOCK, MICHAEL R, GOODMAN, WILLIAM L, MURPHY, PATRICK J, HARRIS, STEVEN E
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	ANALOGOUS ARRANGEMENTS USING OTHER WAVES DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES GYROSCOPIC INSTRUMENTS LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES MEASURING MEASURING DISTANCES, LEVELS OR BEARINGS NAVIGATION OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICS PHOTOGRAMMETRY OR VIDEOGRAMMETRY PHYSICS RADIO DIRECTION-FINDING RADIO NAVIGATION SURVEYING TESTING
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Beschreibung
Zusammenfassung:	The present invention relates to a portable, hand-held distance-measurement apparatus utilizing a laser range finder (100). The distance-measurement apparatus executes a number of distance-measurement cycles. In each cycle, a capacitor (208) begins charging at approximately the same time that a light pulse is generated (224). An analog-to-digital converter (210) generates a digital representation of the capacitor voltage at approximately the same time that a reflected light pulse is received (226). The lowest and the highest digital values are discarded and the remaining digital values are averaged (430) and scaled to produce a distance measurement. A reflective target (500, 600) may be used at a remote location to reflect the light beam back to the distance-measurement apparatus. The distance-measurement apparatus has several power saving features that facilitate convenient battery operation (404). The distance-measurement apparatus may also have a view finder (108).