Nederlandse Organisatie Voor Toegepast-Natuurwetenschappelijk Onderzoek Tno

Siemens Aktiengesellschaft

Asml Netherlands B.v.

Erwin Johannes Martinus Giling

Marcus Adrianus Van De Kerkhof

Haico Victor Kok

Paul Louis Maria Joseph Van Neer

Wilhelmus Petrus De Boeij

Lun Kai Cheng

Earl Lawrence Vincent Goetheer

Rüdiger Schneider

Ralph Joh

Dirk Verdoes

Daniele Piras

Johannes Van Der Meer

Martijn Gerard Dominique Wehrens

Michel Fransois Hubert Klaassen

Wilhelmus Jacobus Maria Rooijakkers

Johannes Maria Kuiper

Tammo Uitterdijk

Jacob Sonneveld

Uilke Stelwagen

Hendikus Robertus Marie Van Greevenbroek

Leon Van Dooren

Methods and systems for measuring a fluid flow comprise a plurality of transceivers disposed at predetermined locations distributed along a perimeter around the fluid flow. The transceivers transmit and receive acoustic signals through the fluid flow there between. A plurality of different acoustic paths through the fluid flow are formed between different transceiver pairs. Different time intervals are measured between respective times of transmitting and receiving the acoustic signals; and along the plurality of different acoustic paths. A velocity map of the fluid flow is calculated by fitting the measured different time intervals to a model of the fluid flow. The model of the fluid flow defines a velocity map with different flow velocities in a cross-section plane transverse to the fluid flow.

Acoustic measurement of a fluid flow

Local strain and optionally other properties of an optical sensing fiber are detected as a function of position along the optical sensing fiber. A light pulse with a plurality of simultaneous laser modes at mutually different wavelengths is transmitted into the optical sensing fiber. Light produced by backscattering of the light pulse in the optical fiber is fed to a multi-way coupler, via a first and second optical path with different optical path lengths. Intensities of different phase combinations of light from the paths are detected by detectors at the outputs of the multiway coupler. A data processing system computes relative phase values of light from the first and second paths for a series to time points with time delays corresponding to scattering at different positions along the fiber. In an embodiment, inelastically scattered light such as due to Brillouin scattering and/or Raman scattered light is selective passed to the detectors and detected.

Detection of local property changes in an optical sensing fiber

A method for treating a contaminated alkaline amino acid salt solution is provided. First, carbon dioxide is introduced into the amino acid salt solution, with the result that carbonate or carbonate salts is or are precipitated, these being filtered off. The remaining filtrate is then cooled, amino acid or amino acid salts being crystallized out and likewise being filtered off. The amino acid or amino acid salt is then dissolved again, with the result that a treated amino acid salt solution is recovered.

Method and device for treating a contaminated alkaline amino acid saline solution

Growing community of inventors

Delft, Netherlands

Erwin Johannes Martinus Giling