Correction of a mixture gas effect in measuring based on radiati

Details Correction of a mixture gas effect in measuring based on radiati Correction of a mixture gas effect in measuring based on radiati

1997-09-15

1999-12-14

Nasser, Robert L.

Surgery

Diagnostic testing

Respiratory

73 233, 422 84, A61B 500

Patent

active

060010649

ABSTRACT:
A measuring device for determining the concentration of such gas components from a gas mixture, which includes collision dilation of the absorption lines constituting the absorption spectral bands for measuring objects. The device comprises a non-dispersive concentration measuring sensor (20), which includes: a measuring chamber (6) containing a gas mixture to be analyzed; a radiation source (17) for emitting over a wavelength range which includes an absorption spectral band used in concentration determination; a detector (18) receiving radiation that has passed through the measuring chamber and for producing a first signal (7) therefrom; as well as an optical bandpass filter (16) positioned between the detector and the radiation source. The measuring device further comprises a second measuring sensor (4) for identifying the viscosity or some other viscosity-related feature of a gas mixture to be analyzed and for producing a second signal (9). Both signals (7, 9) are delivered to a calculating unit (8), which uses at least a second signal for performing the corrections required for the first signal. In addition, the device is provided with a display means (10).

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Journal of Applied Physiology, vol. 25, No. 3, 1968, pp. 333-335, G. Ammann, Problems Associated with the Determination of Carbon Dioxide by Infrared Absorption.
E. O. Doebelin: Measurement Systems, McGraw-Hill, Kogakusha, 1976, pp. 465-475.
Sensors and Actuators A49 (1995) pp. 103-108, H. Andrews, Damping and Gas Viscosity Measurements Using a Microstructure.

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