| 摘要 |
PROBLEM TO BE SOLVED: To provide an instrument for measuring a distribution shape of charged materials, by which the soundness of each part in an electronic circuit constituting a laser unit can easily be confirmed with a simple configuration even when it is installed or not installed in a blast furnace. SOLUTION: Since the laser unit is disposed at the outer part of the base end side of a sonde tube 2 to be installed so that the base end side is out of the blast furnace and the top end side positions in the blast furnace, an antenna 5 is internally provided at the top end part of the sonde tube 2, and the laser unit and the antenna 5 are interconnected through a guide tube 4, thereby positioning the laser unit at the outside of the blast furnace, the soundness of each part in the electronic circuit constituting the laser unit can be confirmed without providing a cooling means for protecting the laser unit, a lead wire leading signals or the like from heat in the sonde tube 2 and without leading out weak signals to the outside distant by several meters. |
