| 摘要 |
1,144,541. Electro-physical measurementflaws. AUTOMATION INDUSTRIES Inc. Sept.19, 1966 [Oct.11, 1965], No.41780/66. Heading G1N. [Also in Division H4] For inspecting railroad track, ultrasonic (see Division H4) and magnetic induction testing equipment is mounted on two carriages 28 supported from the underside of a self-propelled vehicle in a retractable manner. In the test position of the carriages springs or air cylinders apply part of the vehicle weight to the carriages. Induction testing for flaws in railway tracks equipment comprises sets of brushes 38, 40, mounted on spring-biased arms, for circulating several thousand amps through each rail. Pickup coils 44 mounted between the two sets of brushes cut the resulting flux as the carrier vehicle moves along the rail to provide an output signal from flux changes to flaws in the rail. To assist in stabilizing the rail current, preliminary brushes (not shown) on the forward end of carriage 28 may be energized by a "preconditioning" generator. As described the equipment is used in conjunction with an ultrasonic inspection device (see Division H4) |
