The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 20, 2008
Filed:
Feb. 20, 2007
Robert Brown, Peterborough, CA;
Jean-rené Larocque, Peterborough, CA;
Robert Brown, Peterborough, CA;
Jean-René Larocque, Peterborough, CA;
Siemens Milltronics Process Instruments, Inc., Peterborough, Ontario, CA;
Abstract
Pulse-echo ranging system are used in level measurement applications for determining the distance to a target object by measuring how long after transmission of a pulse an echo pulse is received. An echo profile () is generated and then processed to determine the temporal position of the echo pulse on a temporal axis. Based on the fact that the peak portion and the trailing edge of the echo profile are susceptible to be affected by the measurement environment and the target object itself, the accuracy in determining the echo arrival time is increased, by the steps of fitting a branch of a parabola () to a selected portion of the leading edge () of the echo profile () and determining the temporal position of the fitted parabola () on the temporal axis.