Position detection surveying device

• US 6,046,800 A
• Filed: 01/29/1998
• Issued: 04/04/2000
• Est. Priority Date: 01/31/1997
• Status: Expired due to Fees

• Current Assignee: Kabushiki Kaisha Topcon
• Original Assignee: Kabushiki Kaisha Topcon
• Inventors: Kobayashi, Haruhiko, Ohtomo, Fumio, Yamaguchi, Shinji
• Primary Examiner(s): Buczinski, Stephen C.
• Application Number:
  US09/015,449
• Time in Patent Office: 796 Days
• Field of Search: 356/141.1, 356/4.01, 356/5.01, 356/5.1, 356/139.07, 356/139.08, 356/141.4
• US Class Current: 356/141.1
• CPC Class Codes: G01C 15/002 Active optical surveying means optical plumbing G01C15/105

Abstract

The present invention relates to a position detection surveying device for detecting a position of a target, and more particularly to a position detection surveying device which is most suitable for an automatic surveying apparatus and, without using expensive acoustooptic devices, can be miniaturized and manufactured so that it saves the electric power. In the present invention, a light emitting means irradiates a target with a light which is sector-shaped in an up-and-down direction, and a light receiving means receives a reflected light from the target, and a rotating means rotates in a horizontal direction a portion comprising at least the light emitting means and the light receiving means, and a computational processing means is able to detect a position of the target in accordance with a light reception signal from the light receiving means.

Claims

1. A position detection surveying device, comprising;

light emitting means for irradiating a target with a light which is sector-shaped in an up-and-down direction,

light receiving means for receiving a reflected light from the target, said light receiving means having a first light receiving portion and a second light receiving portion arranged with said light emitting means between said first and second light receiving portions,

rotating means for rotating in a horizontal direction a portion comprising at least said light emitting means and said light receiving means, and

computational processing means for detecting a position of said target in accordance with a light reception signal from said light receiving means in an order of light reception of said first light receiving portion and said second light receiving portion.

5. A position detection surveying device, as claimed in claim 1 or 2, further comprising distance measuring means for measuring a distance to said target, and wherein said rotating means rotates said distance measuring means together with said light emitting means and said light receiving means.

2. A position detection surveying device, comprising:

light emitting means for irradiating a target with a light which is sector-shaped in a vertical direction and a light which is sector-shaped in a horizontal direction,

light receiving means for receiving reflected light from the target, said light receiving means having a first light receiving portion and a second light receiving portion arranged in the horizontal direction with said light emitting means between said first and second light receiving portions, and a third light receiving portion and a fourth light receiving portion arranged in the vertical direction with said light emitting means between said third and fourth light receiving portions,

rotating means for rotating, in the horizontal direction and the vertical direction, a portion comprising at least said light emitting means and the light receiving means, and

computational processing means for detecting a vertical position of said target in accordance with a light reception signal of the reflected light formed by the light which is sector-shaped in the horizontal direction as well as for detecting a horizontal position of said target in accordance with a light reception signal of the reflected light formed by the light which is sector-shaped in the vertical direction.

3. A position detection surveying device, comprising:

light emitting means for irradiating a target with a light which is sector-shaped in an up-and-down direction,

light receiving means for receiving a reflected light from the target, said light receiving means having a first light receiving portion and a second light receiving portion arranged with said light emitting means between said first and second light receiving portions,

distance measuring means for measuring a distance to the target,

rotating means for rotating, in a horizontal direction and a vertical direction, a portion comprising at least said light emitting means, said light receiving means, and the distance measuring means, and

computational processing means for detecting a vertical position of said target in accordance with a measurement signal from said distance measuring means, and for detecting a horizontal position of said target in accordance with a light reception signal from said light receiving means.

4. A position detection surveying device as claimed in claim 3,

wherein said computational processing means detects an vertical position and a horizontal position of said target by computing a position of the center of mass in the measurement signal from said distance measuring means.