Boots – shoes – and leggings
Patent
1991-04-05
1993-12-28
Cosimano, Edward R.
Boots, shoes, and leggings
226 45, B23Q 1500
Patent
active
052745732
ABSTRACT:
The edge of a web of material is inserted in a gap in a detector head between an ultrasonic blockage transmitter and an ultrasonic blockage receiver such that the magnitude of the pulse of sound from the transmitter that is received by the receiver is related to the portion of the web that blocks the beam of sound and thereby the position of the edge of the web. A compensation transmitter and compensation receiver are mounted proximate to the blockage transmitter and blockage receiver and transmit similar sound signals across the gap but are unoccluded by the web. The output of the compensation receiver is detected and used to normalize the values of the signal received from the blockage receiver to compensate for the effect of transient changes in ambient conditions. The apparatus includes a controller with a microprocessor which receives the electrical pulses from the two receivers, determines the peak values of the pulses, averages pulse peak values to provide averaged values which reduce the effect of spurious signal variations, and normalizes the value of the blockage receiver signal with the compensation receiver signal to provide an error correcting output signal which can be used to bring the position of the web back to a desired position. A plurality of detectors can be operated by a single microprocessor using multiplexing techniques.
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The Ultrasonic Edge Sensor: Model US 2000, General Web Dynomis Flyer.
AccuGuide Electronic Web Guide, AccuWeb advertisement.
Pulsonic, Ultrasonic, Non-Contact Measuring System, Cleveland Machine Controls, Inc. brochure.
Buisker Raymond A.
Martyn James
Ziemann Erich T.
AccuWeb, Inc.
Cosimano Edward R.
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