Saw blade, a sawing machine and a system thereof

1. Sawing machine for sawing micro trenches in an area comprising a first layer and a second layer, said first layer being a surface layer comprising asphalt or concrete, and said second layer being a bearing layer to said first layer, wherein said micro trenches are adapted for receiving at least one duct/cable; said sawing machine comprising a stabilizing device arranged for stabilizing the walls of the micro trenches when placing ducts/cables into the micro trenches, and further comprising at least one saw blade comprising coding elements forming at least one code symbol representing a unique identity for said saw blade, wherein said at least one code symbol function as an immobilizer for said sawing machine, said sawing machine being arranged to not start if said unique identity is not valid.

2. Sawing machine according to claim 1 , wherein said coding elements comprise electromagnetic coding means.

3. Sawing machine according to claim 2 , wherein said electromagnetic coding means are comprised in a RFID device.

4. Sawing machine according to claim 1 , further comprising first attachment means for attaching said saw blade to said sawing machine.

5. Sawing machine according to claim 4 , wherein said coding elements comprise mechanical coding means and electromagnetic coding means, and said mechanical coding means and said electromagnetic coding means are arranged adjacent to said first attachment means.

6. Sawing machine according to claim 1 , wherein said saw blade is diamond coated and is arranged for up-cut.

7. Sawing machine according to claim 1 , wherein said saw blade is arranged for sawing micro trenches having a depth between 10 to 600 mm and a width between 5 to 25 mm.

8. Sawing machine according to claim 1 , further comprising reading means for reading said coding elements.

9. Sawing machine according to claim 8 , wherein said reading means are one or more in the group comprising: optical reading means, electromagnetic reading means, and mechanical reading means.

10. Sawing machine according to claim 9 , further comprising one or more sensors in the group comprising: heat sensors, gyro, speed sensors, pressure sensors, engine sensors, and wear sensors.

11. Sawing machine according to claim 10 , further comprising computer means in communication with said reading means and sensors, said computer means being arranged for decoding and identifying said unique identity.

12. Sawing machine according to claim 11 , further comprising high precision GPS in communication with said computer means for documenting the use of said at least one saw blade in X-, Y- and Z-coordinates.

13. Sawing machine according to claim 12 , wherein said computer means further is arranged for monitoring said sensors and controlling the operation of said sawing machine.

14. Sawing machine according to claim 13 , further comprising wireless communication means for communication with external communication device over wireless communication systems.

15. A system for cutting micro trenches comprising at least one sawing machine according to claim 14 and further comprising a server unit comprising communication means and a first database, and being arranged for collecting and storing position and operation data from said high precision GPS, said sensors, and said computer means by means of a second data flow.

16. System according to claim 15 , wherein said server unit further is arranged for analyzing said position and operation data and transmitting control data to said computer means by means of a first data flow comprising first work orders containing said control data.

17. System according to claim 15 , wherein said server unit further is arranged for acting as a hub between said sawing machine and an office client.

18. Sawing machine according to claim 1 , wherein said coding elements are in the form of mechanical coding means selected from the group consisting of holes, depressions and protrusions arranged on said saw blade.