Three-dimensional space measurement device and method for operating same

Patent metadata

Field	Value
Publication number	US-9798005-B2
Application number	US-201314655823-A
Country	US
Kind code	B2
Filing date	Dec 26, 2013
Priority date	Dec 28, 2012
Publication date	Oct 24, 2017
Grant date	Oct 24, 2017

Abstract

In the present disclosure, a structure of a 3-dimensional space measurement device is maximally simplified to be easily carriable by a user to measure a 3-dimensional spatial data. For simplifying the structure, a light transmission unit and a light reception unit are fixed to a support plate, and the support plate is fixed to a rotation unit. Provided are a 3-dimensional space measurement device capable of adjusting a rotation angle of the rotation unit and a tilt angle of the support plate to efficiently measure a distance and space, and a measurement method of a distance and space for making 3-dimensional spatial data.

First claim

The invention claimed is:

1. A distance measurement device comprising:
a first light transmitter configured, when active, to emit a first distance measurement beam to a measurement position on a surrounding object;
a second light transmitter configured, when active, to emit a second distance measurement beam to the measurement position on the surrounding object;
a light reception sensor configured to measure a position of a portion of the light reception sensor receiving light reflected by the surrounding object and collected at the distance measurement device;
a central controller configured to selectively active one of the first light transmitter of the second light transmitter to emit one of the first distance measurement beam or the second distance measurement beam to the surrounding object,
wherein the central controller is further configured to selectively activate another one of the first light transmitter or the second light transmitter to adjust a distance between one of a first light source lens included in the first light transmitter or a second light source lens included in the second light transmitter and a light reception lens included in the light reception sensor to adjust an angle of light incident to the light reception lens when the light reception sensor cannot measure the position of the light collected at the distance measurement device;
a support plate to which the first light transmitter, the second light transmitter, and the light reception sensor are fixed;
a tilt motor assembly configured to adjust a slope of the support plate;
a rotation plate to which the support plate is fixed;
a rotation motor assembly configured to adjust a rotation angle of the rotation unit; and
a distance calculation processor configured to determine a distance between the distance measurement device and the measurement position based on the measured position.

2. The distance measurement device according to claim 1 , wherein the first light source lens, the second light source lens, and the light reception lens are configured such that an angle made by the first or the second distance measurement beam and the light reflected at the measurement position and collected at the distance measurement device is in a range of about 0 to 20 degrees.

3. The distance measurement device according to claim 1 , wherein the light reception sensor comprises a wavelength filter, and the wavelength filter passes only a wavelength corresponding to the first distance measurement beam and the second distance measurement beam.

4. The distance measurement device according to claim 1 , wherein each of the first light transmitter and the second light transmitter comprises a light source emitting a corresponding one of the first distance measurement beam or the second distance measurement beam, and
wherein the light source comprises a laser diode (LD) or a light emitting diode (LED).

5. The distance measurement device according to claim 1 , wherein each of the first distance measurement beam and the second distance measuring beam is configured to be a parallel light or a convergent light by using a corresponding one of the first light source lens or the second light source lens.

6. The distance measurement device according to claim 1 , further comprising:
a rotation and tilt controller driving each of the tilt motor assembly and rotation motor assembly to respectively adjust the slope of the support plate and the rotation angle of the rotation plate to move the distance measurement position, and
a spatial information operation processor to calculate a distance between the distance measurement device and the surrounding object based on the distance between the distance measurement device and the measurement position calculated by the distance calculation processor, the slope of the support plate, and the rotation angle of the rotation plate.

7. The distance measurement device according to claim 6 ,
wherein the measurement position is moved on the surrounding object when one or more of the slope of the support plate or the rotation angle of the rotation plate is adjusted by the rotation and tilt controller.

8. The distance measurement device according to claim 6 , further comprising an encoder that transmits to the spatial information operation processor an encoder signal identifying the slope of the support plate and the rotation angle of the rotation plate.

9. A method of operating a distance measurement device, the method comprising:
emitting one of a first distance measurement beam by a first light transmitter or a second distance measurement beam by a second light transmitter to a measurement position on a surrounding object;
determining, by a light reception sensor, whether a position at which light reflected from the measurement position and returned to the distance measurement device is focused can be measured;
calculating, when the position can be measured, a distance between the distance measurement device and the measurement position based on the measured position;
selectively activate another one of the first light transmitter or the second light transmitter to adjust a distance between a first light source lens included in the first light transmitter or a second light source lens included in the second light transmitter and a light reception lens included in the light reception sensor to adjust an angle of the light incident to the light reception lens when the light reception sensor cannot measure the position of the light collected at the distance measurement device; and
adjusting a slope angle of a support plate and a rotation angle of a rotation plate to move the measurement position.

10. The method according to claim 9 , further comprising making spatial information data by using the distance corresponding to the measurement position, the slope angle of the support angle and the rotation angle of the rotation unit.

Assignees

• Lg Electronics Inc

Inventors

• Cho Sungjin
• Lee Jeonguk
• Lee Gyeongeon
• Jeoung Soowhan
• Kim Hyerim
• Cha Sunghoon
• Lee Jejong
• Shin Hyunseok

Classifications

• G01S17/46 Primary

  Indirect determination of position data · CPC title

• G01S7/4817

  relating to scanning · CPC title

• G01C3/08 Primary

  Use of electric radiation detectors · CPC title

• G01S17/48

  Active triangulation systems, i.e. using the transmission and reflection of electromagnetic waves other than radio waves · CPC title

• G01S17/08 Primary

  for measuring distance only (indirect measurement G01S17/46; active triangulation systems G01S17/48) · CPC title