Method and apparatus for detecting objects dragging beneath a train

This invention relates in general to a method and apparatus for detecting objects dragging beneath a train as the train travels along a track and, more particularly, to a method and apparatus for detecting objects dragging beneath a train by sensing the force of impact between the object and a stationary impact element which is positioned along the track in the path of movement of the object. A dragger detects objects dragging beneath a train as the train travels along a track. The dragger includes at least one stationary impact element and a detection circuit including at least one sensor coupled with impact element for sensing the force of the impacts between the objects and the impact element. A method for detecting objects dragging beneath a train involves positioning the stationary impact element along the track in a fixed position intersecting the path of movement of the objects. The method also involves sensing the force of each impact and generating an output signal if the magnitude of any impact is greater than a predetermined magnitude.