1. A method of monitoring formation of deposits caused by depositions of solid particles from a hot, dust-laden flue gas onto walls of a rectangular furnace of a boiler, wherein said walls are formed of tubes that are tightly welded together and through which a cooling medium flows, said method including the steps of:
providing two infrared cameras that are offset by 90\xb0 relative to one another;
detecting, over the entire surface of said walls of said furnace, the exact surface temperature with said infrared cameras via a thermal image obtained of a surface development of said furnace;
comparing the detected exact surface temperature with the temperature of the cooling medium known at respective measurement locations, taking into consideration the thickness and the thermal conductivity of said tubes of said walls of said furnace;
comparing individual images taken by each of said infrared cameras to form an overall development of said walls of the inner surface of said furnace;
determining the coordinates of said deposits on said walls from said overall development; and
determining the thickness of said deposits on said walls from the temperature comparison.
2. A method according to claim 1, wherein said coordinates and said thickness of said deposits on said walls are conveyed to a cleaning system for a precise and intensive removal of said deposits.
3. A method according to claim 1, wherein a radiation influence of the solid particles contained in the flue gas is determined and eliminated with a mathematicalphysical radiation model and the determined parameters for each image point.
4. A method according to claim 1, wherein a heat-flux density that strikes each point of said walls of said furnace is determined.
5. A method according to claim 1, wherein said step of detecting the exact surface temperature is carried out in the middle infrared range of 3.0 to 5.0 \u03bcm.
6. A method according to claim 5, wherein said step of detecting the exact surface temperature is carried out at a wavelength of 3.9 \u03bcm.
7. An apparatus for carrying out the method of claim 1, comprising:
at least one of said infrared cameras in each of two adjacent walls of said rectangular furnace;
wherein each infrared camera is rotatable in a stepwise manner by 360\xb0 about its longitudinal axis and is provided with an oblique objective lens;
wherein each of said infrared cameras has a predetermined rake angle of said oblique objective lens in conjunction with the angle of image of said infrared camera; and
wherein each of said infrared cameras detects the entire width of a wall of said furnace for an image composition, image processing and image evaluation.
8. An apparatus according to claim 7, wherein said infrared cameras are disposed in the walls of said furnace offset by 90\xb0 relative to one another.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A plasma display device, comprising:
a plasma display panel displaying visual images by using gas discharge;
a chassis base supporting the plasma display panel;
a driving board that applies a driving voltage to the plasma display panel;
a connection wire connecting driving board to an electrode included in the plasma display panel and in which an electronic element is packaged; and
a first member adhering to the connection wire to absorb heat transmitted to the electronic element.
2. The plasma display device of claim 1, with the first member comprising a recess for receiving the electronic element.
3. The plasma display device of claim 2, with a first thermally conductive member being disposed between the electronic element and the recess, on a wall of the recess that faces the electronic element in order to transmit the heat of the electronic element to the first member.
4. The plasma display device of claim 1, with an adhesive agent being disposed between the first member and the connection wire to allow the first member to adhere to the connection wire.
5. The plasma display device of claim 4, with the adhesive agent having a smaller surface area than that of the first member that faces the connection wire.
6. The plasma display device of claim 1, with a heat dissipating plate being formed to extend in a longitudinal direction along an end portion of the chassis base, covering the first member.
7. The plasma display device of claim 6, with a second thermally conductive member being disposed between the heat dissipating plate and the first member to transmit heat from the first member to the heat dissipating plate.
8. A plasma display device, comprising:
a plasma display panel displaying visual images by using gas discharge;
a chassis base supporting the plasma display panel;
a driving board that applies a driving voltage to the plasma display panel;
a connection wire connecting the driving board and an electrode included in the plasma display panel, and in which an electronic element is packaged; and
a second member that is disposed on a surface of the driving board, with the surface being opposite to the surface of the driving board that contacting connection wire.
9. The plasma display device of claim 8, with the second member being positioned to correspond to the portion of the driving board that is connected the connection wire.
10. The plasma display device of claim 8, with the second member being formed to cover the entire surface of the driving board, with the surface being opposite to the surface of the driving board that contacting connection wire.
11. A plasma display device, comprising:
a plasma display panel displaying visual images by using gas discharge;
a chassis base supporting the plasma display panel;
a driving board that applies a driving voltage to the plasma display panel;
a connection wire connecting the driving board and an electrode included in the plasma display panel, and in which an electronic element is packaged;
a first member adhering to the connection wire to absorb heat transmitted to the electronic element; and
a second member disposed on a surface of the driving board, the surface being opposite to the surface of the driving board that connects to the connection wire.
12. The plasma display device of claim 11, with the first member comprising a recess for receiving the electronic element.
13. The plasma display device of claim 12, with a first thermally conductive member being disposed between the electronic element and the recess, on a wall of the recess that faces the electronic element to transmit the heat of the electronic element to the first member.
14. The plasma display device of claim 11, with an adhesive agent being disposed between the first member and the connection wire to allow the first member to adhere to the connection wire.
15. The plasma display device of claim 14 with the adhesive agent having a smaller surface area than that of the first member that faces the connection wire.
16. The plasma display device of claim 11, with a heat dissipating plate being formed extending in a longitudinal direction along an end portion of the chassis base to cover the first member.
17. The plasma display device of claim 16, with a second thermally conductive member being disposed between the heat dissipating plate and the first member to transmit heat from the first member to the heat dissipating plate.
18. The plasma display device of claim 11, with the second member being positioned to correspond to the portion of the driving board that is connected the connection wire.
19. The plasma display device of claim 11, with the second member being formed to cover the entire surface of the driving board, with the surface being opposite to the surface of the driving board that contacting connection wire.