Distance sensing apparatus and method

Details Distance sensing apparatus and method Distance sensing apparatus and method

1981-06-25

1984-11-13

Thomas, James D.

Boots, shoes, and leggings

101181, 226 87, 377 18, G01B 700, G01B 724

Patent

active

044829728

ABSTRACT:
Apparatus for sensing distance between a pair of indicia on a surface moving relative to the apparatus has an interval detector, a sensor and a scale device. The interval detector can respond to movement of the surface. The detector can produce an interval signal signifying the time elapsing during the passage of an interval on the surface of a predetermined length. The sensor is positioned alongside the surface for sensing the arrival times of the pair of indicia at the sensor. The scale device responds to the interval detector and sensor device for producing a distance signal signifying the ratio of the time difference in arrival of the pair to the interval signal.

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