ROTARY LASER EMITTING APPARATUS

• US 20100321673A1
• Filed: 06/15/2010
• Published: 12/23/2010
• Est. Priority Date: 06/17/2009
• Status: Active Grant

• Current Assignee: Kabushiki Kaisha Topcon
• Original Assignee: Kabushiki Kaisha Topcon
• Inventors: Kamizono, Fumihiko, HAYASHI, Kunihiro
• Granted Patent: US 8,619,250 B2
• Time in Patent Office: Days
• US Class Current: 356/139.1
• CPC Class Codes: G01C 15/008 combined with inclination sensor

Abstract

A rotary laser emitting apparatus includes a rotary body, a foundation configured to rotatably support the rotary body about an axis, a laser light emitting section contained in the rotary body and configured to emit laser light in a direction orthogonal to a rotation axis of the rotary body, a relative slope detecting mechanism configured to detect an amount of deviation of the rotation axis of the rotary body from the axis of the foundation as a relative slope signal, and a transmitting section configured to transmit the relative slope signal detected by the relative slope detecting mechanism.

Claims

1. A rotary laser emitting apparatus comprising:

a rotary body;

a foundation configured to rotatably support the rotary body about an axis;

a laser light emitting section contained in the rotary body and configured to emit laser light in a direction orthogonal to a rotation axis of the rotary body;

a relative slope detecting mechanism configured to detect an amount of deviation of the rotation axis of the rotary body from the axis of the foundation as a relative slope signal; and

a transmitting section configured to transmit the relative slope signal detected by the relative slope detecting mechanism.

2. The rotary laser emitting apparatus according to claim 1, wherein

the relative slope detecting mechanism is provided between the rotary body and the foundation.

3. The rotary laser emitting apparatus according to claim 1, wherein

the laser light emitting section has a laser light source.

4. The rotary laser emitting apparatus according to claim 3, wherein

the transmitting section includes the laser light source of the laser emitting section and a drive controlling section configured to control the laser light source in accordance with the relative slope signal so as to superimpose the relative slope signal on the laser light emitted from the laser emitting section while the rotary body is rotated.

5. The rotary laser emitting apparatus according to claim 4, wherein

the relative slope signal is superimposed on the laser light by a Phase Shift Keying system.

6. The rotary laser emitting apparatus according to claim 1, further comprising an absolute slope detecting mechanism provided in the foundation to detect a slope of the axis of the foundation in relation to a horizontal plane as an absolute slope signal, wherein

the transmitting section transmits the absolute slope signal detected by the absolute slope detecting mechanism simultaneously with the relative slope signal.

7. The rotary laser emitting apparatus according to claim 4, further comprising an absolute slope detecting mechanism provided in the foundation to detect a slope of the axis of the foundation in relation to a horizontal plane as an absolute slope signal;

wherein

the transmitting section transmits the absolute slope signal detected by the absolute slope detecting mechanism simultaneously with the relative slope signal.

8. The rotary laser emitting apparatus according to claim 5, further comprising an absolute slope detecting mechanism provided in the foundation to detect a slope of the axis of the foundation in relation to a horizontal plane as an absolute slope signal;

wherein

the transmitting section transmits the absolute slope signal detected by the absolute slope detecting mechanism simultaneously with the relative slope signal.

9. A survey system comprising:

the rotary laser emitting apparatus according to claim 4;

a receiver configured to receive the laser light emitted from the rotary laser emitting apparatus; and

a calculation mechanism configured to calculate an angle of elevation between a point where the receiver is positioned and a point where the rotary laser emitting apparatus is positioned based on a signal of the laser light received by the receiver, wherein

the receiver receives an alternative current signal of the laser light on which the relative slope signal is superimposed; and

the calculation mechanism is configured to full-wave rectify the received alternative current signal of the laser light and to calculate a barycentric position of the rectified received signals.

10. A survey system comprising:

the rotary laser emitting apparatus according to claim 5;

a receiver configured to receive the laser light emitted from the rotary laser emitting apparatus; and

a calculation mechanism configured to calculate an angle of elevation between a point where the receiver is positioned and a point where the rotary laser emitting apparatus is positioned based on a signal of the laser light received by the receiver, wherein

the receiver receives an alternative current signal of the laser light on which the relative slope signal is superimposed; and

the calculation mechanism is configured to full-wave rectify the received alternative current signal of the laser light and to calculate a barycentric position of the rectified received signals.

11. A survey system comprising:

the rotary laser emitting apparatus according to claim 6;

a receiver configured to receive the laser light emitted from the rotary laser emitting apparatus; and

a calculation mechanism configured to calculate an angle of elevation between a point where the receiver is positioned and a point where the rotary laser emitting apparatus is positioned based on a signal of the laser light received by the receiver, wherein

the receiver receives an alternative current signal of the laser light on which the relative slope signal is superimposed; and

the calculation mechanism is configured to full-wave rectify the received alternative current signal of the laser light and to calculate a barycentric position of the rectified received signals.

12. The rotary laser emitting apparatus according to claim 1, further comprising:

a wireless communication device;

wherein

the transmitting section transmits the relative slope signal by the wireless communication device.