Three-dimensional measurement system

1. A three-dimensional measurement system for reconstitution of a real surface, comprising:

a hardware part including a mobile two-axis assembly associated with a remote measurement device installed on a fixed part, each axis being equipped with an angular encoder restoring the direction of a sighting at any time, and

a software part including a control part at the input and an acquisition part at the output, wherein the software part includes means for real time comparing two angular positions measured at a scanning profile set value, and wherein said software part further comprises means for superposing data obtained with said hardware part at said angular positions with an original CAD definition of a surface so as to obtain a reconstituted CAD definition of said surface;

wherein said real surface is a surface of a real aircraft cockpit, and said original CAD definition is an original CAD definition of a surface of an aircraft cockpit such that said reconstituted CAD definition of the surface is a reconstitution of a CAD definition of an aircraft cockpit from a real cockpit.

2. A system according to claim 1 , wherein the mobile two-axis assembly is in the shape of an <<L>>.

3. A system according to claim 2 , wherein, in said mobile two-axis assembly, rotation about each axis is controlled by four modules:

bearings assuring guidance between a first and a second part,

a motor for rotation of the first part with respect to the second part,

an angular encoder for restoring the position about this axis to the software part, and

a cable passage module.

4. A system according to claim 1 , wherein the remote measurement device is a laser device.

5. A system according to claim 1 , wherein the fixed part is a tripod.

6. A process for implementation of a three-dimensional measurement system in an aircraft cockpit, said system comprising a hardware part including a mobile two-axis assembly associated with a remote measurement device installed on a fixed part, each axis being equipped with an angular encoder restoring the direction of a sighting at any time, and a software part including a control part at the input and an acquisition part at the output, wherein the software part includes means for real time comparing two angular positions measured at a scanning profile set value, said method including the steps of:

positioning the hardware part of the system at the center of the aircraft cockpit,

calculating the position of the system, by aiming at a known point in the cockpit to obtain a measurement point,

making said measurement point correspond to a corresponding CAD point,

positioning and calibrating by positioning this hardware part at different positions in the aircraft cockpit.

7. A process according to claim 6 , wherein the hardware part of the system is positioned on the walls or ceiling of the cockpit by a suction cup device.

8. A process according to claim 6 , wherein said mobile two-axis assembly is in the shape of an <<L>>.

9. A process according to claim 6 , further comprising a step of controlling, in the mobile two-axis assembly, rotation about each axis.

10. A process according to claim 9 , wherein said controlling is performed by four modules:

bearings assuring guidance between a first and a second part,

a motor for rotation of the first part with respect to the second part,

an angular encoder for restoring the position about this axis to the software part, and

a cable passage module.

11. A process according to claim 6 , wherein said the remote measurement device is a laser device.

12. A process according to claim 6 , wherein said fixed part is a tripod.