| 摘要 |
PURPOSE:To determine the temperature distribution accurately, by revolving a thermometer about a long-sized member at the angular velocity the same as the rotational angular velocity in circumferential direction of the long-sized member. CONSTITUTION:The tilt angle beta and the rotational angular velocity omega of a carry roller 12 are detected with an angle detector 14 and an angular velocity detector 16. Information on the angle beta and angular velocity omega is inputted into an omegap arithmetic unit 18A and a Va arithmetic unit 18B to compute the rotational angular velocity omegap and the carry speed Va of a steel pipe 10 by respective specified formulas. Then, receiving the angular velocity omegap information of the steel pipe 10 being fed from the arithmetic unit 18A, a rotation controller 20B drives a drive motor of a thermometer rotating device 20 to turn the thermometer 13 about the steel pipe 10 synchronizing the rotation of the steel pipe 10. On the other hand, receiving information on the velocity Va of the steel pipe 10, a synchronizer 22 samples a temperature signal T from the thermometer 13 at a fetch timing corresponding to the velocity Va to output temperature changes of the steel pipe 10 to a memory 30 as the function TVa of the axial direction A of the steel pipe while making the temperature information along the axial direction A of the steel pipe recorded 32. |
