Apparatus and method for determining the distance between two points
First Claim
1. An apparatus for measuring the distance between two remote points, the apparatus comprising:
- at least one laser-based device for electronically determining by laser light reflection the respective distances to said remote points;
an angle indicating device for determining the included angle between said respective distances;
and a display for displaying said distance between said two remote points which is computed using the law of cosines.
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Accused Products
Abstract
Measurement of respective distances to two remote points and measurement of the included angle, permit electronic calculation of the distance between the two remote points such as points on the opposed edges of an interior wall the length or other linear dimension of which is to be measured. The preferred embodiment is implemented using two laser-based pointer devices connected on a common housing through a shaft encoder. Each pointer device has a laser transmitter and detector for determining the distance to selected points at opposite ends of a wall. The angle between the pointers is determined by a shaft encoder as one of the two pointers is rotated from pointing at a first edge of the wall to the point at the second edge while the other of the pointers remains directed toward the first edge.
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Citations
21 Claims
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1. An apparatus for measuring the distance between two remote points, the apparatus comprising:
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at least one laser-based device for electronically determining by laser light reflection the respective distances to said remote points;
an angle indicating device for determining the included angle between said respective distances;
and a display for displaying said distance between said two remote points which is computed using the law of cosines. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An electronic length measuring apparatus for determining linear dimension between two remote points on a remote surface, the apparatus comprising:
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at least one laser-based pointer for electronically determining by laser light reflection the respective distances to said two remote points;
an angle indicating device for determining the included angle between said respective distances;
and a display for displaying said distance between said two remote points which is computed using the law of cosines. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A method for determining the distance between two remote points, the method comprising the following steps:
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a) electronically measuring the distance from a measuring location to a first one of said two remote points by laser light reflection, b) electronically measuring the distance from said measuring location to a second one of said two remote points by laser light reflection;
c) electronically measuring the angle included between said measuring location and said two remote points;
d) calculating said distance between said two remote points based upon the measurements made in steps a), b) and c) and the law of cosines.
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Specification