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Device for accurate measurement of the dimensions of an object by ultrasonic waves

  • US 4,049,954 A
  • Filed: 04/19/1976
  • Issued: 09/20/1977
  • Est. Priority Date: 04/22/1975
  • Status: Expired due to Term
First Claim
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1. A device for the accurate measurement of dimensions of an object by ultrasonic waves, wherein said device comprises at least one ultransonic probe which operates as a transmitter-receiver for ultrasonic pulses, at least two reflecting barriers for said ultrasonic pulses, said barriers being in precisely fixed locations on the path of the ultransonic pulses so as to provide only partial obstruction of said path, means for placing, in a less obstructed portion of said path, an object whose dimensions are to be measured in the direction of propagation of the ultrasonic pulses, means for producing electric signals proportional in value to the time intervals between the reception on each probe of the various echoes corresponding to the reflections of the ultrasonic pulses from said barriers and from said object, and electronic processing means for comparing electric signals proportional to the interval between echoes corresponding to reflections from two of said barriers with electric signals proportional to the interval between echoes corresponding to reflection from different surfaces of said object and for thereby producing electric signals proportional to dimensions of said object.

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