Automatic plumb and level tool with acoustic measuring capability
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
G01C-001/02
출원번호
US-0984320
(1992-12-02)
발명자
/ 주소
Rando Joseph F. (Los Altos Hills CA)
출원인 / 주소
Spectra-Physics Laserplane, Inc. (Dayton OH 02)
인용정보
피인용 횟수 :
57인용 특허 :
0
초록▼
An automatic plumb, level, pointing and distance measuring tool uses a visible laser diode to project a beam in any of several different modes through a beam exit window. The tool, approximately the size and shape of a tape measure, can be placed on one edge to project a tilt-compensated vertical be
An automatic plumb, level, pointing and distance measuring tool uses a visible laser diode to project a beam in any of several different modes through a beam exit window. The tool, approximately the size and shape of a tape measure, can be placed on one edge to project a tilt-compensated vertical beam. Placed on another edge 90°-rotated, the tool projects through the same exit window a tilt-compensated horizontal beam. When laid on either of its larger flat sides, the tilt compensation becomes inoperative and the tool projects a beam which is fixed relative to the housing. Acoustic distance measurement is facilitated using a second component or target side device which receives both a light beam an acoustic signal simultaneously projected from the laser tool across a space to be measured. A receiver in the target side device first detects arrival of a characteristically modulated or pulsed light beam, received at a photodetector on the target side device, and then receives the acoustic signal. A clock starts when the light beam is detected and stops when the acoustic signal is received. The acoustic transit time is thereby clocked and distance is calculated and displayed. The use of a single acoustic transit time, without reflection increases distance measuring range. Also, the visible laser beam projected between the two components provides a clear visual indication of the distance to be measured.
대표청구항▼
A laser beam projecting device for plumbing, leveling, alignment and distance measuring, comprising, a hand-carryable housing, at least one laser source means mounted within the housing, for producing at least one collimated beam of visible laser light, at least one laser beam exit window in the hou
A laser beam projecting device for plumbing, leveling, alignment and distance measuring, comprising, a hand-carryable housing, at least one laser source means mounted within the housing, for producing at least one collimated beam of visible laser light, at least one laser beam exit window in the housing, beam directing means in the housing for directing at least one beam from the at least one laser source means at a predetermined angular orientation out of the housing through at least one exit window when said housing is in a first position, tilt compensation means in the housing and associated with the beam directing means for correcting for relatively small tilt angles of the housing when in positions other than a true first position, and for projecting the at least one beam through the at least one exit window in substantially the true predetermined angular orientation despite such relatively small tilt angles, means associated with the laser beam projecting device for distance measuring, including: means for characterizing at least one collimated beam of visible laser light produced at said at least one laser source means, so that a modulated or pulsed beam is projected from said hand-carryable housing, means for projecting an acoustic signal from said hand-carryable housing for use in distance measuring generally along said at least one collimated beam in substantially a true predetermined angular orientation.
Butler Andrew G. (Palo Alto CA) Duval Eugene F. (Menlo Park CA) Richards Gregory L. (Menlo Park CA) Barham Mitchell C. (Redwood City CA) Adams Daniel T. (Menlo Park CA) Scott William A. (Palo Alto CA, Gravity oriented laser scanner.
D'Alessandro Richard ; Jackson Jonathan Appleget ; Hart Edward E. ; Perchak Robert Matthew, Laser receiver with out-of-plumb indication and compensation.
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