Apparatus for monitoring the surface of the charge of a shaft furnace
AssigneeCentre de Recherches Metallurgiques-Centrum voor Research in de Metallurgie
InventorRobert A. Pirlet
Life of this patent
Estimating the term…
Abstract
A telemetric optical-radiation laser transmitter 5 outside an aperture 2 sends a beam to a point 14 scanned over the charge surface 1, via a rotating assembly 7 of deflectors, one deflector 11 oscillating with a periodicity related to the rotation of the assembly. A telemetric receiver 19, sensitive to the radiation from the transmitter 5 in a selected wavelength range, receives radiation re-transmitted from the point 14 through an aperture 3. A thermometric receiver 6 receives thermal radiation from the point 14 along a path coinciding with the path of the transmitted optical radiation.
Claims15
Apparatus for monitoring the surface of the charge of a shaft furnace, disposed outside at least one aperture in a furnace wall above the surface of the charge, the apparatus comprising:
- (a) a telemetric optical-radiation transmitter;
- (b) a telemetric receiver having a surface sensitive to the radiation of the transmitter in a selected range of wavelengths;
- (c) means for scanning at least part of the surface of the charge, comprising:
- (i) an assembly of deflectors, at least one of which is movable with respect to the others, enabling the transmission of optical rays along a folded optical path from the transmitter to the receiver via the surface of the charge, one portion of the optical path being coincident with or parallel to the optical axis of at least one of the transmitter and the receiver,
- (ii) means for rotating the movable deflector about an axis perpendicular to a plane containing the optical path, and
- (iii) means for rotating the assembly of deflectors about an axis located in the said plane coincident with or parallel to one portion of the optical path;
- and
- (d) means for filtering the optical radiation.
Dependencies are inferred from the claim text.