Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
May 8, 2007
Patent Application Number
10312327
Date Filed
June 26, 2001
Patent Primary Examiner
Patent abstract
This invention concerns the measurement of particle size of particles entrained in a gas. The apparatus (5) includes an acoustic sensor (10) used to monitor the acoustic signals produced by collisions of pneumatically conveyed particles with the sensor (10). Signal processing electronics and software (15) are used to determine, for each impact, the peak height of the acoustic signal. The particle size is calculated from the peak height distribution and either the signal (pulse) duration distribution or the airstream (impact) velocity, according to Hertzian Impact Theory.
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