G - Physics – 01 – B
Patent
G - Physics
01
B
73/23, 354/25
G01B 7/12 (2006.01)
Patent
CA 1331490
- 64 - ABSTRACT A computerized gauge measures dimensions, typically in the range of 6.1865" to 6.1917" accurate to ? .001", typically the diameter of a steel railroad car axle. It indicates the in-tolerance/out-of- tolerance condition of each measurement as well as the quantitative measurement value. The gauge simultaneously senses the temperature, typically within a range of -20°F to 100°F ?1°F, of the axle workpiece. In consideration of the predetermined coefficient of expansion of the workpiece, the gauge calculates the dimension that the workpiece would exhibit should it be thermally brought to a predetermined, 59°F by convention, reference temperature. From the workpiece- temperature-compensated dimension resulting from such calculation, and from manually preset dimensional tolerance ranges, the axle is indicated to be (i) oversized but repairable, (ii) within an acceptable size range, (iii) undersized but repairable, or (iv) undersized and unrepairable. The gauge may further sense its own temperature and, in consideration of another predetermined coefficient of expansion as besuits the gauge, calculate a gauge- and workpiece- temperature-compensated dimension. All temperature sensing is normally integral with the measurement process. Compensation for temperature-induced dimensional variation is typically at an accuracy of better than ?.0001" for steel axles of 6+" diameter over a temperature range of greater than 100°F.
603929
Kirby Eades Gale Baker
Wachtler William R.
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