| 摘要 |
An arrangement for monitoring the deployment of cable from a cable supply includes reflective tape disposed on the exterior of the cable at longitudinally spaced locations. Light having a predetermined wavelength characteristic is directed toward the cable as it passes a defined area. The reflection of the light is sensed and a signal is provided when the sensed light exceeds a predetermined level. This signal is utilized to determine the length of cable deployed from the supply. In addition, a second type of tape having a lower reflectivity is disposed on the cable immediately preceding enlarged diameter sections of the cable. This latter tape does not reflect sufficient light to generate the predetermined signal but is visible to a human observer so that the cable pulling equipment can be adjusted to accommodate the enlarged diameter section.
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