| 摘要 |
<p>PROBLEM TO BE SOLVED: To accurately measure the thickness of the column section of a rail and to accurately discriminate acceptability by providing a threshold value and eliminating the column section thickness value of the roll mark section by providing window in the data processing. SOLUTION: Laser distance measuring devices 1a and 1b measure the positions of the rail side surfaces. A controller 4 converts the measured signals from the devices 1a and 1b into digital data for every pulse signal generated by a speedometer 3 at a constant distance, i.e., for every prescribed amount of the movement of a rail 2 and gives the data to a computer 6. The computer 6 successively writes the data into a memory. Then, the thickness of the column section of a railroad rail is continuously computed and a threshold value is provided for the difference between the current and the previous measurements. If the difference is larger than the threshold value or equal, the current computed value of the column section thickness is replaced by the previously computed value and the column section thickness value of the roll mark section is eliminated. Moreover, by providing a window in the data processing, range of the roll mark section is determined and the replaced column section thickness computed value of the roll mark section, which becomes the trouble during the computation of the acceptability discrimination, is eliminated.</p> |
