Actuation mechanism having two degrees of freedom and sentry robot having the same

1. A sentry robot comprising: a base; a main body disposed on the base and capable of pivoting; a master camera disposed on the main body and capable of moving with the motion of the main body;

an actuation mechanism having two degrees of freedom of movement comprising:

a pivot driving portion, which comprises: a platform;

a first connection portion rotatably installed on the platform; and

a first motor which rotates the first connection portion; and

a vertical driving portion, which comprises:

a second connection portion connected to an upper side of the first connection portion;

a column disposed on the second connection portion; a mount rotatably disposed adjacent an upper portion of the column; and

a second motor rotating the mount, with respect to the column, at least partially around a first y-axis, wherein the vertical driving portion is at least partially rotated around a first z-axis when the first motor rotates the first connection portion; and

an active camera disposed on the actuation mechanism and capable of moving with the motion of the actuation mechanism to at least partially rotate around the first z-axis and to at least partially rotate around the first y-axis,

wherein the master camera is capable of rotating around a second y-axis.

2. The sentry robot of claim 1 , wherein the master camera comprises two cameras.

3. The sentry robot of claim 1 , further comprising a gun disposed on the actuation mechanism and oriented to point in the same direction as the active camera points and capable of moving with the active camera while tracking a target.

4. The sentry robot of claim 1 , wherein the main body rotates around the first z-axis.

5. The sentry robot of claim 1 , wherein the master camera has a wider viewing angle than the active camera.

6. The sentry robot of claim 1 , wherein the master camera has a zoom function.

7. The sentry robot of claim 1 , wherein the master camera and the active camera have an infrared block filter that blocks input of an image in an infrared area.

8. The sentry robot of claim 1 , wherein the column has a bend that offsets the column in a horizontal direction from bottom to top.

9. The sentry robot of claim 1 , wherein the column is bent in a rearward direction.

10. The sentry robot of claim 3 , further comprising gun armor disposed adjacent to the gun.

11. The sentry robot of claim 3 , wherein:

the column has a bend that offsets the column in a horizontal direction from bottom to top;

the column has a mounting point for the gun that is not directly above a center of rotation of the first connection portion; and

the gun has a center of gravity that is generally directly above the center of rotation of the first connection portion.

12. The sentry robot of claim 6 , wherein the active camera has a higher resolution than the master camera.

13. The sentry robot of claim 7 , wherein the master camera and the active camera can receive a color image when the infrared block filter is in an on state and a black and white image when the infrared block filter is in an off state.

14. The sentry robot of claim 10 , wherein the armor substantially surrounds at least three sides of the entire gun and moves with the gun.

15. The sentry robot of claim 10 , wherein the armor surrounds at least four sides of rotation points of the first connection portion and the second rotation portion.

16. A sentry robot comprising:

an actuation mechanism disposed on a main body, the actuation mechanism comprising: a pivot driving portion, which comprises: a first connection portion rotatably installed on a platform; and a first motor which drives the first connection portion; and a vertical driving portion, which comprises: a second connection portion coupled to the first connection portion that is rotated by drive forces received from the first connection portion; a column disposed on the second connection portion; a mount rotatably disposed adjacent an upper portion of the column; and a second motor that rotates the mount, with respect to the column, at least partially around a first y-axis, wherein the vertical driving portion is at least partially rotated around a first z-axis when the first motor rotates the first connection portion; a base upon which the main body is rotatably coupled, wherein the main body rotates at least partially around the first z-axis; a master camera capable of moving with the motion of the main body; and an active camera disposed on the mount of the actuation mechanism and capable of moving with the motion of the actuation mechanism to at least partially rotate around the first z-axis and capable of moving with the motion of the mount to at least partially rotate around the first y-axis;

wherein the master camera is capable of rotating around a second y-axis.

17. The sentry robot of claim 16 , wherein the master camera has a wider viewing angle than the active camera.

18. The sentry robot of claim 16 , wherein the column is bent in a rearward direction.

19. The sentry robot of claim 17 , wherein the master camera has a zoom function.

20. The sentry robot of claim 17 , wherein the active camera has a higher resolution than the master camera.

21. The sentry robot of claim 17 , further comprising a gun disposed adjacent to the mount and oriented to point in the same direction as the active camera points and capable of moving with the active camera while tracking a target.

22. A sentry robot comprising:

an actuation mechanism disposed on a main body, the actuation mechanism comprising:

a pivot driving portion, which comprises:

a platform;

a first connection portion rotatably installed on the platform; and

a first motor which drives the first connection portion; and

a vertical driving portion, which comprises:

a second connection portion coupled to the first connection portion that is rotated by drive forces received from the first connection portion;

a column disposed on the second connection portion;

a mount rotatably disposed on the column; and

a second motor that rotates the mount, with respect to the column, at least partially around a first y-axis, wherein the vertical driving portion is at least partially rotated around a first z-axis when the first motor rotates the first connection portion;

a base upon which the main body is rotatably disposed, wherein the main body rotates at least partially around the first z-axis;

a master camera coupled to the main body and capable of moving with the motion of the main body, and also capable of at least partially rotating around a second z-axis, and of at least partially rotating around a second y-axis; and

an active camera disposed on the actuation mechanism mount and capable of moving with the motion of the actuation mechanism to at least partially rotate around the first z-axis and capable of moving with the motion of the mount to at least partially rotate around the first y-axis.

23. The sentry robot of claim 22 , wherein the master camera has a zoom function and has a wider viewing angle than the active camera, and the active camera has a higher resolution than the master camera.

24. The sentry robot of claim 22 , wherein the column is bent in a rearward direction.