DE102022201988A1 - vehicle device and vehicle - Google Patents

Abstract

The invention relates to a vehicle device (1,1a) for measuring a gas to be analyzed with a specific absorption wavelength range in the exhaled air of a vehicle occupant in a vehicle interior (2) of a vehicle (3), the vehicle device (1,1a) having at least one laser sensor module (4 ) with a wavelength range that emits at least the absorption wavelength range for spectroscopic detection of the gas to be analyzed in a part of the exhaled air of the vehicle occupant to be examined and for generating a detector signal, and an evaluation unit (5) that is designed to transmit the detector signal of the laser sensor module (4). analyze and determine a concentration of the gas to be analyzed, at least one filter being provided upstream of the laser sensor module (4), the filter being designed to absorb at least one interfering gas in the exhaled air on or in the filter or through it to change the filter chemically, whereby the at least one interfering gas can be filtered out of the part of the exhaled air of the vehicle occupant to be examined. The invention also relates to a vehicle.

Description

The invention relates to a vehicle device for measuring a gas to be analyzed with a specific absorption wavelength range in the exhaled air of a vehicle occupant in a vehicle interior of a vehicle, the vehicle device having at least one laser sensor module with a wavelength range emitting at least the absorption wavelength range for spectroscopic detection of the gas to be analyzed in a gas to be examined Part of the exhaled air of the vehicle occupant and for generating a detector signal, and an evaluation unit which is designed to analyze the detector signal of the laser sensor module and to determine a concentration of the gas to be analyzed. The invention also relates to a vehicle.

Driver monitoring is becoming increasingly important for assisted and automated driving up to SAE Level 3. The focus here is, for example, on the early detection of unfitness to drive due to consumption of alcohol or other drugs, overtiredness or increased stress levels. In this context, the analysis of the exhaled air in particular enables a completely contact-free, continuous physiological monitoring of the driver and/or the vehicle occupants. In this context, infrared laser spectroscopy has an outstanding position as a sensor technology for the detection and quantification of volatile organic substances (volatile organic compounds, VOCs) in the exhaled air and is already being used commercially, for example, in breath alcohol testing devices. The basis for this is the Lambert-Beer law.

For example, the exhaled air can be used to determine the various volatile organic compounds (VOCs), which can be used to determine the driver's condition, for example with regard to motion sickness.

For example, to determine if an individual is impaired by a particular substance (e.g., alcohol, tetrahydrocannabinol (THC), cocaine, etc.), various impairment detection devices are used. For example, breath analyzers such as breathalyzers estimate the amount of the harmful substance in the user's blood. The test subject or user blows into the device, and a sensor estimates the user's blood alcohol content from the breath sample. State-of-the-art supervised breath tests are used by police to prevent drunk driving.

Unattended tests with alcolocks in vehicles are also increasingly being used. Sensor technologies include catalytic semiconductors and infrared spectroscopy.

The airways are emptied through a tight-fitting mouthpiece. Such devices contain sensor elements that provide a signal after a deep breath. In order to ensure a correct determination, the subject must release a deep exhalation. This requires a significant amount of effort, especially for people with limited breathing capacity. The handling of mouthpieces is costly and time-consuming and represents an undesirable source of error due to condensation.

The selectivity of the analytes in complex gas mixtures such as breathing or indoor air remains the greatest challenge.

The EP 2669660 B1 discloses a method and apparatus for remotely detecting ethanol vapors in the atmosphere to determine the ethanol vapor concentration in the air exhaled by humans in the passenger compartment of a vehicle, in which a light beam from a laser light source having a wavelength corresponding to the absorption spectrum of ethanol in the mid-IR range corresponds , is passed through a measuring room and then the light intensity is measured after the light beam has passed through this room and then the ethanol vapor concentration is determined on the basis of the spectral analysis of the dependence of the light intensity on the ethanol content. It involves trimming the wavelength of the light source in a wavelength range that covers a sharp feature of the absorption of ethanol at a wavelength of 3.345 µm or 3.447 µm and covers part or all of the "absorption plateau" of ethanol in order to correctly quantify the ethanol vapors.

It is therefore an object of the invention to specify a vehicle device for improved measurement of specific gases in the exhaled air of a vehicle occupant in a vehicle. Furthermore, it is an object to specify such a vehicle with a vehicle device.

The object is achieved by a vehicle device having the features of claim 1 and a vehicle having the features of claim 13.

Further advantageous measures are listed in the dependent claims, which can be suitably combined with one another in order to achieve further advantages.

The object is achieved by a vehicle device for measuring a gas to be analyzed with a specific absorption wavelength range in the exhaled air of a vehicle occupant in a vehicle interior of a vehicle comprising at least one laser sensor module with a wavelength range emitting at least the absorption wavelength range for spectroscopic detection of the gas to be analyzed in a part to be examined the air exhaled by the vehicle occupant and for generating a detector signal, and an evaluation unit which is designed to analyze the detector signal of the laser sensor module and to determine a concentration of the gas to be analyzed,
wherein at least one filter is provided, which is connected upstream of the laser sensor module, wherein the filter is designed to absorb at least one interfering gas in the exhaled air on or in the filter or to chemically change it through the filter, whereby the at least one interfering gas from the to be examined part of the exhaled air of the vehicle occupant can be filtered out.

In particular, the laser sensor module includes an infrared laser for infrared laser spectroscopy as the sensor technology.

According to the invention, it was recognized that it is problematic in laser spectroscopy that many of the relevant absorption ranges/wavelength ranges are not substance-specific. It was recognized that, for example, in the case of breath alcohol detection, the range around 3.4 micrometers in wavelength is a possible absorption band for detecting ethanol.

It was further recognized according to the invention that the laser radiation in this wavelength range is not only absorbed by ethanol but also by other gases such as methanol or isopropanol. Consequently, the concentration measurement of ethanol that is actually of interest is superimposed/falsified by interfering gases/interfering substances such as methanol or isopropanol that may also be present in the exhaled air sample to be examined and a sufficiently precise concentration of the desired gas in the exhaled air cannot be detected. Based on this finding, according to the invention, a filter is now connected in front of the measuring device, ie the laser sensor module, which absorbs/filters out gases which falsify/interfere with the measurement of the gas to be analyzed.

Upstream means that this interfering gas/interfering substance is largely eliminated from the part of the exhaled air to be measured, either by filtering it out of the exhaled air sample to be measured or by absorbing/adsorbing the interfering gas/interfering substance on the filter. The filter can also be designed as a catalyst that chemically changes the interfering gas/interfering substance in such a way that it can no longer be detected by the laser sensor module in the defined wavelength range

In particular, those interfering gases are filtered out that have a similar absorption wavelength range as the gas to be analyzed. This means that the interfering gases can be specifically filtered out of the exhaled air to be analyzed before the measurement by the laser sensor module. A simple and sufficiently accurate concentration of the desired gas can thus be determined.

By placing one or more such filters in front of the actual laser sensor module, superimposed interference gases can be removed from the exhaled air to be analyzed before the actual concentration measurement.

The vehicle device according to the invention can be used to increase the substance selectivity when measuring the breath of vehicle occupants, for example by means of infrared laser spectroscopy using a corresponding laser sensor module.

In a further embodiment, the at least one interfering gas has an at least partially overlapping wavelength range like the absorption wavelength range of the gas to be analyzed. If several filters are connected upstream, several interfering gases can be filtered out. Alternatively, a filter that can filter out/absorb several interfering gases can also be used.

In a further development, the laser sensor module has a measuring chamber with at least one input for the exhaled air to be analyzed and a laser detector arrangement with at least one laser light source for generating laser light with at least the wavelength that corresponds to the absorption spectrum of the gas to be determined in advance and with at least one detector for detecting the laser light, the laser-detector arrangement being designed in such a way that the measuring chamber is located in a beam path of the laser light between the laser light source and the detector.

In particular, the laser can be an infrared laser for infrared laser spectroscopy as sensor technology for detecting and quantifying gases in the exhaled air. This is the basis for infrared laser spectroscopy Lambert-Beer law. The wavelength of the laser radiation used is preferably in the range from 2 to 12 micrometers.

In a further embodiment, the measuring chamber has an outlet for the outflow of the measured exhaled air. This allows the measured exhaled air to flow out again. Furthermore, for example, the laser sensor module can be arranged in a flow channel, for example in the air system of an air conditioning system or air conditioning device. This ensures that a fresh/up-to-date exhaled air sample is used for the measurement.

In a further embodiment, a first laser sensor module and at least a second laser sensor module are provided, with the filter being designed as a gas filter for filtering out the gas to be analyzed, with the gas filter only being connected upstream of the first laser sensor module, and with the first laser sensor module being designed to generate a first detector signal , with which a concentration of the remaining gases with a similar or at least partially overlapping absorption wavelength range as the gas to be analyzed can be determined, and wherein the second laser sensor module is designed to generate an unfiltered second detector signal with which a concentration of all gases with a similar or at least partially overlapping absorption wavelength range can be determined, and the concentration of the gas to be analyzed can be determined by means of the first and the second detector signal.

The desired gas to be detected is thus the interfering gas.

The gas filter is designed as a filter which filters out/absorbs the substance to be analyzed, for example ethanol.

This determines the concentration of those gases that have a similar wavelength, for example, in the case of ethanol, these are the interfering gases methanol, isopropanol, etc. without ethanol itself, and the concentration of all gases with this or a similar absorption wavelength range, for example the concentration of methanol, isopropanol as well ethanol itself in the exhaled air.

Furthermore, the evaluation unit can be designed to determine the concentration of the gas to be analyzed in the exhaled air based on the difference or the quotient between the first detector signal and the second detector signal. This means that such a gas filter can be used to remove the actual gas (e.g. ethanol) from the exhaled air sample and the concentration of the gas to be analyzed can then be determined from the difference or the quotient of the double measurement with and without filtering.

This means, for example, that several filters can be dispensed with, since the gas sought is specifically filtered out by a filter.

Alternatively, the filter is designed as a gas filter for filtering out the gas to be analyzed, with the gas filter being pivotably connectable upstream of the at least one laser sensor module, so that the at least one laser sensor module is designed to generate a first detector signal with a gas filter connected upstream, with which a concentration of the remaining gases is determined similar or at least partially overlapping absorption wavelength range as the gas to be analyzed can be generated, and wherein the laser sensor module is designed to generate a second unfiltered detector signal without an upstream gas filter, with which a concentration of all gases with a similar or at least partially overlapping absorption wavelength range can be determined generate and wherein the concentration of the gas to be analyzed can be determined by means of the first and the second detector signal.

Furthermore, the evaluation unit is preferably designed to determine the concentration of the gas to be analyzed in the exhaled air based on the difference or the quotient between the first detector signal and the second detector signal.

As a result, only one laser sensor module is required.

Furthermore, the at least one laser module can have an input for the exhaled air to be measured and an output for the outflow of the measured exhaled air, the vehicle device being designed to outflow the measured exhaled air through the output in such a way that the second detector signal is generated on the basis of newly inflowing unfiltered exhaled air can be accomplished by the laser module.

In a further embodiment, a controllable upstream device is provided, in which the gas filter is arranged, for upstream connection of the gas filter in front of the at least one laser sensor module. Such a ballast can be accomplished, for example, by means of a simple actuator; the ballast can be a housing, for example.
In a further embodiment, the gas to be analyzed is ethanol. In further training are a first Filter and a second filter are provided, which are connected upstream of the at least one laser sensor module, wherein the first filter is designed to remove methanol and the second filter is designed to remove isopropanol. This can be used to determine whether the driver is unfit to drive.

In a further development, the filter is designed as a catalytic filter. Such catalytic filters can, for example, use the differences in chemical reactivity between different gases to improve the selectivity of downstream sensors. This means that e.g. ethanol passes through the filter while methanol is completely absorbed or filtered out by the filter. This eliminates interfering gases or significantly reduces their concentration, which can lead to high sensor selectivity.

The object is also achieved by a vehicle with a steering wheel and a cockpit and a vehicle device as described above, the vehicle device being arranged in the steering wheel or in the cockpit in the area of the driver. As a result, the exhaled air of the driver can be easily detected.

Furthermore, several vehicle devices as described above can be arranged in the area of the driver for determining the concentration of the gas to be analyzed through the exhaled air, and the respectively determined concentrations can be compared with one another to determine a final concentration. As a result, the measured concentration of the gas to be analyzed can be better limited to the driver.

Furthermore, the vehicle can be designed to output an acoustic and/or visual and/or haptic warning if the concentration of the gas to be analyzed is determined to be above a threshold value. This is particularly advantageous when the gas to be analyzed is an alcohol or ethanol. This can warn the driver against careless driving or operating the vehicle.

Further properties and advantages of the present invention emerge from the following description with reference to the attached figures. Variations may be devised by those skilled in the art without departing from the scope of the invention as defined by the following claims.

• 1: ein erfindungsgemäßes Fahrzeug mit einer erfindungsgemäßen Fahrzeugvorrichtung in einer ersten Ausgestaltung,
• 2 zeigt verschiedene Absorptionsbereiche verschiedener Gase.
• 3: ein erfindungsgemäßes Fahrzeug mit einer erfindungsgemäßen Fahrzeugvorrichtung in einer zweiten Ausgestaltung.

The figures show schematically:

• 1 : a vehicle according to the invention with a vehicle device according to the invention in a first embodiment,
• 2 shows different absorption ranges of different gases.
• 3 1: a vehicle according to the invention with a vehicle device according to the invention in a second embodiment.

1 shows a vehicle device 1 for measuring a gas to be analyzed with a specific absorption wavelength range in the exhaled air of a vehicle occupant in a vehicle interior 2 of a vehicle 3.

In this example, the gas to be measured is ethanol (alcohol). This has an absorption wavelength range of approx. 3.3 to 3.5 µm (absorption wavelength band around 3.4 µm) based on IR spectroscopy (infrared laser spectroscopy as sensor technology). If the ethanol molecule in a gas mixture is offered a light quantum of suitable energy / absorption wavelength by a light wave, which is generated for example by an infrared laser, this is absorbed and the ethanol molecule changes from the vibrational ground state to an excited state.

There is also a laser sensor module 4 comprising the infrared laser, for emitting the light wave in a wavelength range for spectroscopic detection of the gas to be analyzed, here ethanol, in a part of the exhaled air of the vehicle occupant to be examined and for generating a detector signal based on the emitted laser light.

The laser sensor module 4 can have a measuring chamber with at least one input for the exhaled air sample to be analyzed.

The laser sensor module 4 also has a laser detector arrangement. This includes a laser light source, here the infrared laser, for generating laser light with at least the wavelength that corresponds at least to the absorption spectrum of the gas to be determined in advance and with a detector for detecting the corresponding gas. The wavelength of the laser radiation used is preferably in the range from 2 to 12 micrometers.

The laser-detector arrangement is designed in such a way that the measuring chamber is located in a beam path of the laser light between the laser light source and the detector.

Thus, using infrared laser spectroscopy as the sensor technology, a detection and quantification of the gas to be analyzed that is in the exhaled air can be accomplished. The basis for this is the Lambert-Beer law. This describes the attenuation of the intensity of a radiation in relation to its initial intensity when passing through a medium with an absorbing substance as a function of the concentration of the absorbing substance.

2 shows different absorption ranges of different gases.

How 2 illustrated by a diagram, it is problematic in infrared laser spectroscopy that many of the relevant absorption ranges/wavelength ranges, such as those of ethanol, are not substance-specific.

This shows the absorption ranges as absorption coefficients of various gases plotted against the wavelength in µm. It was thus recognized that, for example, in the case of breath alcohol detection, the range around 3.4 μm wavelength is a possible absorption band for the detection of ethanol. This is mainly due to the fact that interfering substances such as water (vapour) and carbon dioxide occurring in high concentrations in the breathing gas do not absorb in this wavelength range.

However, the laser radiation in this wavelength range is not only absorbed by ethanol, but also by other alcohols such as methanol or isopropanol.

Both isopropanol and methanol have a partially overlapping absorption range between 3.3-3.5 µm. These gases thus act as interfering gases or interfering substances. Consequently, the concentration measurement of ethanol that is actually of interest is overlaid/falsified by gases possibly also present in the exhaled air sample, such as methanol interfering gas and isopropanol interfering gas, and a sufficiently precise concentration of the desired ethanol gas in the exhaled air cannot be detected.

In order to filter these out, a filter is now connected in front of the laser sensor module 4, which absorbs or filters out the interfering gas(es) which falsifies/interferes with the measurement of the gas to be analyzed.

Upstream means that in the part of the exhaled air to be measured the methanol interfering gas as well as the isopropanol interfering gas are largely eliminated, either by filtering them out of the exhaled air sample to be measured or by absorbing the methanol interfering gas and the isopropanol interfering gas on the filter. As a result, the laser sensor module 4 only detects the ethanol as a detector signal.

Using an evaluation unit 5, which can also be integrated in the laser sensor module 4, the concentration of the ethanol in the exhaled air can then be determined.

This can involve one or more upstream filters, which on the one hand separate or filter out methanol interfering gas or isopropanol interfering gas on the respective filter.

As a result, this selectivity problem is solved by connecting suitable substance-specific filters upstream. The selected substance, here ethanol, can be specifically determined from the exhaled air sample to be analyzed.

This allows the concentration of ethanol in the exhaled air to be determined with sufficient accuracy.

Such a vehicle device 1 can be arranged in the vicinity of the driver, for example in or on the steering wheel or in the area of the headrest, in order to largely exclude exhaled air from other vehicle occupants.

Furthermore, the vehicle 3 can be designed to output a visual and/or haptic and/or acoustic warning 6 if the ethanol concentration detected by the vehicle device 1 exceeds a previously defined value.

A plurality of such vehicle devices 1 can also be arranged in the vicinity of the driver. The respective determined concentration values can thus be compared or validated and on the basis of this a final concentration value can be determined in which the individual concentration values are included, possibly weighted. For example, such a vehicle device 1, which is arranged on the steering wheel, can be assigned a higher weight than other vehicle devices 1. It is also possible to include other individual concentration values in a weighted manner in the determination of the final concentration value.

3 1 shows another vehicle device 1a for measuring a gas to be analyzed with a specific absorption wavelength range in the exhaled air of a vehicle occupant in a vehicle interior 2 of a vehicle 3 by means of IR spectroscopy.

In this example, this gas is also the gas to be measured, ethanol (alcohol) with an absorption wavelength range of approx. 3.3 to 3.5 μm based on IR spectroscopy (infrared laser spectroscopy as sensor technology).

There is also a first laser sensor module 4 and a second laser sensor module 4a, for emitting a light in a wavelength range of the ethanol for spectroscopic detection of the ethanol to be analyzed in a part of the exhaled air of the vehicle occupant to be examined and for generating a first detector signal and a second detector signal.

In this case, the first laser sensor module 4 is preceded by a gas filter which filters out the gas to be analyzed, in this case ethanol.

The first laser sensor module 4 thus generates a first detector signal, which can be used to measure essentially the concentration of the methanol interfering gas and the isopropanol interfering gas as well as all other interfering gases absorbing in this wavelength range, without the concentration of ethanol.

However, no gas filter is connected upstream of the second laser sensor module 4a. A second detector signal is thus generated using the second laser sensor module 4a, which detects all substances/gases in this wavelength range, ie both ethanol and the interfering gases isopropanol and methanol as well as other interfering gases.

The concentration of the desired ethanol can now be determined on the basis of the first detector signal and the second detector signal by means of difference or quotient formation.

It is advantageous here, for example, if the two laser sensor modules 4, 4a are arranged next to one another or in the vicinity of one another, in order not to falsify the measurement of the ethanol in the exhaled air by mixing it with the exhaled air of other vehicle occupants.

This means that such a gas filter can also be used to remove the actual marker substance, such as ethanol, from the exhaled air sample. The concentration of the marker substance, here ethanol, can then be determined from the difference or the quotient of the double measurement before and after filtering (difference measurement).

Alternatively, a single laser sensor module 4 can be provided, which can be preceded by a pivotable gas filter for filtering out the gas to be analyzed. A first measurement can be carried out with an upstream pivotable gas filter for generating the first detector signal.

The upstream connection can be accomplished automatically, for example, by means of a housing in which the gas filter is installed and an adjustable actuator. The upstream gas filter can then be removed and a second measurement can be carried out to generate the second detector signal.

The evaluation unit 5 can then use the difference or the quotient between the first detector signal and the second detector signal to determine the concentration of the ethanol in the exhaled air.

The laser module 4 can have an input for the exhaled air to be measured and an output for the outflow of the measured exhaled air, with the vehicle device 1a being designed for the outflow of the measured exhaled air through the output in such a way that the second detector signal is generated on the basis of newly inflowing unfiltered exhaled air can be accomplished by the laser module 4. This can be accomplished, for example, by arranging it in an air path such as the air conditioning system.

Only one laser sensor module 4 is required due to the pivotable upstream circuit.

Reference List

1:1a

vehicle device

2

vehicle interior

3

vehicle

4.4a

laser sensor module

5

Evaluation unit 6 acoustic and/or visual and/or haptic warning

QUOTES INCLUDED IN DESCRIPTION

This list of documents cited by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent Literature Cited

• EP 2669660 B1 [0008]

Claims (15)

Vehicle device (1,1a) for measuring a gas to be analyzed with a specific absorption wavelength range in the exhaled air of a vehicle occupant in a vehicle interior (2) of a vehicle (3), the vehicle device (1,1a) having at least one laser sensor module (4). a wavelength range emitting at least the absorption wavelength range for spectroscopic detection of the gas to be analyzed in a part of the exhaled air of the vehicle occupant to be examined and for generating a detector signal, and an evaluation unit (5) which is designed to analyze the detector signal of the laser sensor module (4) and to determine a concentration of the gas to be analyzed, characterized in that at least one filter is provided, which is connected upstream of the laser sensor module (4), the filter being designed to absorb at least one interfering gas in the exhaled air on or in the filter or to change chemically through the filter, whereby the at least one interfering gas can be filtered out of the part of the exhaled air of the vehicle occupant to be examined. Vehicle device (1.1a) after claim 1 , characterized in that the at least one interfering gas has an at least partially overlapping wavelength range as the absorption wavelength range of the gas to be analyzed. Vehicle device (1,1a) according to one of the preceding claims, characterized in that the laser sensor module (4) has a measuring chamber with at least one input for the exhaled air to be analyzed, and a laser detector arrangement with at least one laser light source for generating laser light with at least the wavelength that corresponds to the absorption spectrum of the gas to be determined in advance and with at least one detector for detecting the laser light, the laser-detector arrangement being designed in such a way that the measuring chamber is located in a beam path of the laser light between the laser light source and the detector. Vehicle device (1.1a) after claim 3 , characterized in that the measuring chamber has an outlet for outflow of the measured exhaled air. Vehicle device (1,1a) according to one of the preceding claims, characterized in that a first laser sensor module (4) and at least a second laser sensor module (4a) are provided, with the filter being designed as a gas filter for filtering out the gas to be analyzed, with only the the first laser sensor module (4) is preceded by the gas filter, and wherein the first laser sensor module (4) is designed to generate a first detector signal with which a concentration of the remaining gases with a similar or at least partially overlapping absorption wavelength range as the gas to be analyzed can be determined and wherein the second laser sensor module (4a) is designed to generate a second unfiltered detector signal, with which a concentration of all gases with a similar or at least partially overlapping absorption wavelength range can be determined, and wherein the concentration of the gas to be analyzed is determined by means of the first and the second Detector signal can be determined. Vehicle device (1.1a) after claim 5 , characterized in that the evaluation unit (5) is designed to determine the concentration of the gas to be analyzed in the exhaled air based on the difference or the quotient between the first detector signal and the second detector signal. Vehicle device (1,1a) according to one of the preceding Claims 1 until 4 , characterized in that the filter is designed as a gas filter for filtering out the gas to be analyzed, the gas filter being pivotably connectable upstream of the at least one laser sensor module (4), so that the at least one laser sensor module (4) is designed to generate a first detector signal with upstream Gas filter, with which a concentration of the remaining gases with a similar or at least partially overlapping absorption wavelength range as the gas to be analyzed can be determined, and wherein the laser sensor module (4) is also designed to generate a second unfiltered detector signal without an upstream gas filter, with which a concentration can be determined from all gases with a similar or at least partially overlapping absorption wavelength range, and wherein the concentration of the gas to be analyzed can be determined by means of the first and the second detector signal. Vehicle device (1.1a) after claim 7 , characterized in that the evaluation unit (5) is designed to determine the concentration of the gas to be analyzed in the exhaled air based on the difference or the quotient between the first detector signal and the second detector signal. Vehicle device (1,1a) according to one of the preceding Claims 7 until 8th , thereby characterized in that the at least one laser module (4) has an inlet for the exhaled air to be measured and an outlet for outflow of the measured exhaled air, wherein the vehicle device (1, 1a) is designed for outflow of the measured exhaled air through the outlet, such that a The second detector signal can be generated by the laser module (4) on the basis of newly inflowing, unfiltered exhaled air. Vehicle device (1,1a) according to one of the preceding Claims 7 until 9 , characterized in that a controllable upstream device is provided, in which the gas filter is arranged, for upstream connection of the gas filter before the at least one laser sensor module (4). Vehicle device (1,1a) according to one of the preceding claims, characterized in that the gas to be analyzed is ethanol. Vehicle device (1.1a) after claim 11 , characterized in that a first filter and a second filter are provided, which are connected upstream of the at least one laser sensor module (4), the first filter being designed for removing methanol and the second filter for removing isopropanol. Vehicle (3) with a steering wheel and a cockpit and a vehicle device (1,1a) according to one of the preceding claims, wherein the vehicle device (1,1a) is arranged in the steering wheel or in the cockpit in the area of the driver. Vehicle (3) after Claim 13 , characterized in that several vehicle devices (1.1a) are arranged in the area of the driver for determining the concentration of the gas to be analyzed through the exhaled air, and the respectively determined concentrations are compared with one another to determine a final concentration. Vehicle (3) after Claim 13 or 14 , characterized in that the vehicle (3) is designed to output an acoustic and/or visual and/or haptic warning (6) when the concentration of the gas to be analyzed is determined above a threshold value.

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