165 results about "Droplet flow" patented technology

Gas containing particles or droplets flowing continuously through a microphone is perturbed by sound waves. Sound-induced localized pressure changes in the gas are measured by detecting variations in gas opacity with an optical transducer disposed transverse to the flow direction.

Nozzles and nebulizers able to produce aerosol with optimum and reproducible quality based on feedback information obtained using laser imaging techniques. Two laser-based imaging techniques based on particle image velocimetry (PTV) and optical patternation map and contrast size and velocity distributions for indirect and direct pneumatic nebulizations in plasma spectrometry. Two pulses from thin laser sheet with known time difference illuminate droplets flow field. Charge coupled device (CCL)) captures scattering of laser light from droplets, providing two instantaneous particle images. Pointwise cross-correlation of corresponding images yields two-dimensional velocity map of aerosol velocity field. For droplet size distribution studies, solution is doped with fluorescent dye and both laser induced florescence (LIF) and Mie scattering images are captured simultaneously by two CCDs with the same field of view. Ratio of LIF / Mie images provides relative droplet size information, then scaled by point calibration method via phase Doppler particle analyzer.

An apparatus for controlling droplets allows the phase difference between a calibration signal and its signature signal on a detector to be minimized, or the amplitude of the signature signal to be maximized, by adjusting the droplet charging means of the device, or the droplet generation means, and the signals on either. The apparatus converts a stream of fluid into a stream of droplets under the influence of a droplet stimulation signal imposed onto the droplet generating means. Droplets are subsequently signal-wise charged under the influence of a droplet charging signal imposed on the droplet charging means. The charged droplets are then deflected. The calibration signal is imposed onto the stream of droplets. The calibration signal has characteristics that do not appreciably affect the trajectory of the stream of droplets, thereby ensuring that the placement accuracy of the individual droplets is a maintained. The calibration signal further has a signal phase that is independent of the droplet charging signal. A charge detection means is used to extract a charge detection signal from the at least a part of the droplets. The charge detection signal is filtered to extract a signature signal of the calibration signal. The phase control system then varies at least one of the droplet generation means, droplet stimulation signal, droplet charging means and droplet charging signal until the phase between the signature signal and the calibration signal is minimized. A plurality of streams of droplets may be controlled by the method of the invention.

The purpose of the present invention is to provide a mass spectrometer device with a high detection sensitivity, achieved by efficiently vaporizing a sprayed sample solution in order to generate charged microdroplets and thereby improve the efficiency of sample ionization, and to reduce large droplets with high ionic strength. The present invention is a liquid chromatography mass spectrometer device having: a liquid chromatographic separation means which separates a sample solution into the respective components thereof, a sample spraying unit which sprays, as droplets, the sample solution separated and eluted by the liquid chromatographic separation means, an ion generation means which generates ions by charging the droplets (droplet charging), a mass spectrometer unit which receives and separates the ions, and a desolvation unit which removes the solvent contained in the charged droplets. The present invention is characterized by the desolvation unit having a desolvation flow chamber through which the charged droplets flow, a heating means which heats the desolvation flow chamber, and a helical droplet conduit provided in the desolvation flow chamber.