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:
Aug. 30, 2022
Filed:
May. 12, 2017
Trumpf Photonic Components Gmbh, Ulm, DE;
Johannes Hendrikus Maria Spruit, Waalre, NL;
Alexander Marc Van Der Lee, Venlo, NL;
Gerben Kooijman, Leende, NL;
Okke Ouweltjes, Veldhoven, NL;
Joachim Wilhelm Hellmig, Valkenswaard, NL;
Arnoldus Johannes Martinus Jozeph Ras, Brabant, NL;
Petrus Theodorus Jutte, Weert, NL;
TRUMPF PHOTONIC COMPONENTS GMBH, Ulm, DE;
Abstract
The invention describes a laser sensor or laser sensor module () using self-mixing interference for particle density detection, a related method of particle density detection and a corresponding computer program product. The invention further relates to devices comprising such a laser sensor or laser sensor module. It is a basic idea of the present invention to detect particles by means of self-mixing interference signals and determine a corresponding particle density. In addition at least a first parameter related to at least one velocity component of a velocity vector of the particles is determined in order to correct the particle density if there is the relative movement between a detection volume and the particles. Such a relative movement may for example be related to a velocity of a fluid transporting the particles (e.g. wind speed). Furthermore, it is possible to determine at least one velocity component of the velocity of the particles based on the self-mixing interference signals.