OVERHEAD WIRE WEAR MEASUREMENT DEVICE AND OVERHEAD WIRE WEAR MEASUREMENT METHOD

In an overhead wire wear measurement device and method for finding the remaining diameter of an overhead wire (5) by capturing an image of the lower surface of the overhead wire (5), which comes into contact with a pantograph, with a line sensor camera (2) disposed on the roof of a train and by performing image processing on the captured image of the lower surface of the overhead wire (5), the remaining diameter of a horizontally worn overhead wire (5A), which has only a horizontally worn part (5a) , is calculated as a remaining-diameter-equivalent value (H) for an unevenly worn overhead wire (5AB ), which has the horizontally worn part (5a) and an obliquely worn part (5b), the horizontally worn overhead wire ( 5A) having the same cross-sectional area as the unevenly worn overhead wire (5AB) Figure 2