Ultrasonic fork height measuring apparatus

Details Ultrasonic fork height measuring apparatus Ultrasonic fork height measuring apparatus

G - Physics

01

B

349/33

G01B 17/00 (2006.01) B66F 9/075 (2006.01) G01S 11/14 (2006.01)

Patent

CA 1143824

BF&N 6778 ULTRASONIC FORK HEIGHT MEASURING APPARATUS ABSTRACT OF THE DISCLOSURE The height to which the forks of a lift truck are raised is measured by an ultrasonic height measuring arrangement including a downward facing transmitting trans- ducer, positioned on the truck platform in fixed position with respect to the forks, and a downward facing ultrasonic receiving transducer which receives ultrasonic acoustic energy waves reflected by an upward facing parabolic reflector. The receiving transducer is positioned in a casing substantially at the focal point of the parabolic reflector and is moutned by means of springs which provide vibration isolation between the casing and the transducer.

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