Patent ID: 7948626
Filing Date: 2011-05-24
Classification: G01L,G01N

Abstract:
1. A method for measuring pressure and/or concentration of a gas in an optically transparent container with unknown and variable background spectrum, using a system for automated measuring of total gas pressure and of partial pressure of one selected component of a gas in at least partially optically transparent closed containers; said containers being of different types, such as bottles of glass or plastic material whose sidewall surfaces have an intrinsic transmission totally un-known and variable from one type to another within a very large range, in which the system includes: a laser source which emits a laser beam of a predetermined wavelength, towards the optically transparent closed container which contains the gas to be measured, said gas partially absorbing the wavelength of the laser beam optical detectors configured to detect the laser beam which is attenuated by the gas absorption; wherein said detectors provide first data of gas absorption representative of a first absorption spectrum of the gas including distorted absorption lines and background absorption due to the container walls and noise an implemented method which is a feature of the calculation and processing device for recording and elaborating said first data; wherein the output of these operations are parameters which represent a second absorption spectrum free of distortion in the absorption lines and of the background; from these parameters it is possible to determine gas pressure and concentration in the container; the method comprising the actions of: