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Title: Acoustic methods to monitor sliver linear density and yarn strength

Methods and apparatus are provided for monitoring sliver and yarn characteristics. Transverse waves are generated relative to the sliver or yarn. At least one acoustic sensor is in contact with the sliver or yarn for detecting waves coupled to the sliver or yarn and for generating a signal. The generated signal is processed to identify the predefined characteristics including sliver or yarn linear density. The transverse waves can be generated with a high-powered acoustic transmitter spaced relative to the sliver or yarn with large amplitude pulses having a central frequency in a range between 20 KHz and 40 KHz applied to the transmitter. The transverse waves can be generated by mechanically agitating the sliver or yarn with a tapping member.
 [1];  [1];  [2]
  1. (Naperville, IL)
  2. (Downers Grove, IL)
Issue Date:
OSTI Identifier:
University of Chicago (Chicago, IL) ANL
Patent Number(s):
US 5606113
Contract Number:
Research Org:
Argonne National Laboratory (ANL), Argonne, IL
Country of Publication:
United States
acoustic; methods; monitor; sliver; linear; density; yarn; strength; apparatus; provided; monitoring; characteristics; transverse; waves; generated; relative; sensor; contact; detecting; coupled; generating; signal; processed; identify; predefined; including; high-powered; transmitter; spaced; amplitude; pulses; central; frequency; range; 20; khz; 40; applied; mechanically; agitating; tapping; generated signal; transverse waves; amplitude pulse; waves couple; acoustic transmitter; acoustic sensor; /73/19/