DEVICE FOR DETERMINING THE CONCENTRATION OF AT LEAST ONE GAS COMPONENT IN A BREATHING GAS MIXTURE
First Claim
1. A device for determining a concentration of a gas component in an inhaled gas or in an exhaled gas of a living being, the device comprising:
- a radiation source configured to emit light or heat radiation in a radiation direction in a wavelength range of lambda1 (λ
1)=2.5 μ
m to lambda2 (λ
2)=14.0 μ
m;
a detector array with at least two detector elements configured to detect the radiation generated by the radiation source;
at least two bandpass filter elements each of the filter elements being arranged at one of the at least two detector elements; and
a control unit configured to control operation of the radiation source and to detect the signal of the at least two detector elements, wherein;
at least one of the at least two bandpass filter elements is configured to be optically transparent for infrared radiation which is absorbed by a measured gas;
at least one of the at least two bandpass filter elements is configured to be optically transparent for a radiation that is not absorbed by the measured gas; and
at least one of the two detector elements with at least one of the bandpass filter elements is arranged in an angular arrangement at an angle in a range of 20°
to 80°
in relation to an axis extending through the radiation source parallel to or identical to the radiation direction of the emission of the radiation source.
1 Assignment
0 Petitions
Accused Products
Abstract
A device (1) for determining the concentration of a gas component is configured with a radiation source (30) for emitting (31) a light radiation or heat radiation in an infrared wavelength range. A detector array (40) has at least two detector elements (50, 60), configured to detect the radiation generated by the radiation source (30), in an angular arrangement (52, 62) and with filter elements (51, 61). At least one of the two detector elements (50, 60) is oriented in an angular arrangement (52, 62) in relation to a vertical axis (32), so that a range of overlap (65) is obtained due to the angular arrangements (52, 62). The range of overlap (65) causes attenuations in the propagation of light, which attenuations may be due, for example, to gas molecules or moisture (400), affect both detector elements (50, 60) and are thus compensated concerning the concentration determination.
-
Citations
11 Claims
-
1. A device for determining a concentration of a gas component in an inhaled gas or in an exhaled gas of a living being, the device comprising:
-
a radiation source configured to emit light or heat radiation in a radiation direction in a wavelength range of lambda1 (λ
1)=2.5 μ
m to lambda2 (λ
2)=14.0 μ
m;a detector array with at least two detector elements configured to detect the radiation generated by the radiation source; at least two bandpass filter elements each of the filter elements being arranged at one of the at least two detector elements; and a control unit configured to control operation of the radiation source and to detect the signal of the at least two detector elements, wherein; at least one of the at least two bandpass filter elements is configured to be optically transparent for infrared radiation which is absorbed by a measured gas; at least one of the at least two bandpass filter elements is configured to be optically transparent for a radiation that is not absorbed by the measured gas; and at least one of the two detector elements with at least one of the bandpass filter elements is arranged in an angular arrangement at an angle in a range of 20°
to 80°
in relation to an axis extending through the radiation source parallel to or identical to the radiation direction of the emission of the radiation source. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
Specification