EP 0542542 B1 19970507 - Method and apparatus for monitoring the temperature and velocity of plasma sprayed particles
Title (en)
Method and apparatus for monitoring the temperature and velocity of plasma sprayed particles
Title (de)
Verfahren und Vorrichtung zur Überwachung der Temperatur und Geschwindigkeit von gespritzten Plasmateilchen
Title (fr)
Méthode et appareillage pour surveiller la température et la vitesse des particules au cours de la pulvérisation au plasma
Publication
Application
Priority
CA 2055267 A 19911112
Abstract (en)
[origin: EP0542542A1] A method and an apparatus for monitoring simultaneously the temperature and the velocity of sprayed particles. The system is comprised of a sensor head attached to the spray gun, an optical fibre transmitting the collected radiation to detection apparatus, and a protective detection cabinet having the detection apparatus that incorporates two detectors. A two-slit or multiple-slit mask is located in the sensor head at the end of the optical fibre. For the temperature measurements, the particle emitted radiation collected by the sensor head is transmitted to two photodetectors, filtered by interference filters at two adjacent wavelengths. The particle temperature may be computed from the ratio of the detector outputs. To measure the velocity, the two-slit system collects radiation emitted by the in-flight particles travelling in the sensor field of view, which generates a double peak light pulse transmitted through the optical fibre. The time delay between these two peaks may be evaluated automatically and the particle velocity computed knowing the distance between the two slit images. <IMAGE>
IPC 1-7
IPC 8 full level
H05H 1/00 (2006.01)
CPC (source: EP)
H05H 1/0025 (2013.01)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0542542 A1 19930519; EP 0542542 B1 19970507; CA 2055267 A1 19930513; CA 2055267 C 19990112; DE 69219560 D1 19970612; DE 69219560 T2 19971113
DOCDB simple family (application)
EP 92310333 A 19921112; CA 2055267 A 19911112; DE 69219560 T 19921112