HIGHLY ACCURATE BREATH TEST SYSTEM
First Claim
1. A system for breath test of a person includinga sensor unit comprisinga first sensor element configured to detect the presence and/or concentration of a volatile substance, present in air from a breath flowing through a predefined inlet area and to generate a signal corresponding to the concentration of said substance;
- a second sensor element configured to detect the presence of a tracer gas in said flowing air;
an analyzer configured to determine the concentration of said substance in the breath of said person, the determination being based on said signal corresponding to the substance concentration;
means for generating and controlling said air flow, including a fan or a pump, said means being adapted to interrupt said flow upon the detection of a breath, wherein the criteria for breath detection includes tracer gas detection.
0 Assignments
0 Petitions
Accused Products
Abstract
The invention relates to a system for breath test of a person. It includes a sensor unit configured to sense the presence/concentration of a volatile substance, e.g. alcohol, present in air flowing through a predefined inlet area and generating a signal corresponding to the concentration of said substance. An analyzer determines the concentration of said substance in the breath of said person. It comprises means for the temporary interruption of said air flow at a point in time coinciding with the detection of a breath. It also relates to a method comprising interrupting the flow through said predefined area for a predetermined period of time, and detecting the concentration of said substance during said interruption.
5 Citations
15 Claims
-
1. A system for breath test of a person including
a sensor unit comprising a first sensor element configured to detect the presence and/or concentration of a volatile substance, present in air from a breath flowing through a predefined inlet area and to generate a signal corresponding to the concentration of said substance; -
a second sensor element configured to detect the presence of a tracer gas in said flowing air; an analyzer configured to determine the concentration of said substance in the breath of said person, the determination being based on said signal corresponding to the substance concentration; means for generating and controlling said air flow, including a fan or a pump, said means being adapted to interrupt said flow upon the detection of a breath, wherein the criteria for breath detection includes tracer gas detection. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
-
-
15. A method of performing a breath test of a person, comprising the steps of:
-
detecting, using a first sensor element, the presence and/or concentration of a volatile substance present in air from a breath flowing through a predefined inlet area; generating a signal corresponding to the concentration of said substance; detecting, using a second sensor element, presence of a tracer gas in said flowing air; determining, using an analyzer, a concentration of said substance in the breath of said person, based on said signal corresponding to the substance concentration; controlling said air flow using a fan or a pump adapted to interrupt said air flow upon the detection of a breath; interrupting the air flow through said predefined area for a limited period of time; and detecting the concentration of said substance during said interruption.
-
Specification