Preventing cheating of in-vehicle breath alcohol analyzer system

Patent metadata

Field	Value
Publication number	US-12561990-B2
Application number	US-202418405144-A
Country	US
Kind code	B2
Filing date	Jan 5, 2024
Priority date	Jan 5, 2024
Publication date	Feb 24, 2026
Grant date	Feb 24, 2026

Abstract

Methods and system for inhibiting a driver from cheating a vehicle breath alcohol sensor. The breath alcohol sensor is mounted within a vehicle and determines an alcohol concentration of a breath of an occupant. An image sensor generates images of the occupant within the vehicle. A processor is configured to determine whether the occupant is attempting to cheat the breath alcohol sensor by executing image processing on the images to identify a face of the occupant, objects in front of the face of the occupant, and/or whether the occupant is actually the one blowing into the breath alcohol sensor. If the image processing yields results that the driver is attempting to cheat the sensor, the processor can inhibit driver operation of the vehicle.

First claim

What is claimed is:

1 . A system for inhibiting a driver from cheating a vehicle breath alcohol sensor, the system comprising:
a breath alcohol sensor mounted within a vehicle and configured to determine an alcohol concentration of a breath of an occupant of the vehicle; an image sensor mounted within the vehicle and configured to generate images of the occupant within the vehicle; and a processor communicatively coupled to the breath alcohol sensor and to the image sensor, the processor being configured to determine whether the occupant is attempting to cheat the breath alcohol sensor, wherein the processor is programmed to:
compare the alcohol concentration of the breath to a threshold,
execute image processing on the images to identify (i) a face of the occupant and (ii) an object in front of the face of the occupant or in front of the breath alcohol sensor,
execute image processing to determine, based on image processing on the images, that the occupant is not blowing or breathing into the breath alcohol sensor; and
determine that the occupant is attempting to cheat the breath alcohol sensor based on (i) the comparison of the alcohol concentration of the breath to the threshold and (ii) the execution of the image processing unable to identify the face of the occupant or identifying the object in front of the face of the occupant or in front of the breath alcohol sensor indicating that the occupant is not blowing or breathing into the breath alcohol sensor when the alcohol concentration of the breath is being compared to the threshold;
determine, based on image processing on the images, an image-based respiration rate of the occupant over time;
wherein the determination that the occupant is not blowing or breathing into the breath alcohol sensor is based upon the image-based respiration rate of the occupant.

2 . The system of claim 1 , wherein the processor is further programmed to execute an object-recognition machine-learning model to determine the object is one of a balloon, tube, air filter, bottle, or a head of another occupant in the vehicle; and
wherein the determining if the occupant is attempting to cheat the breath alcohol sensor is based upon the determination made by the object-recognition machine-learning model.

3 . The system of claim 1 , wherein the processor is further programmed to:
determine, based on image processing of the images, a presence of another face of another occupant in a field of view of the image sensor; and wherein the determining if the occupant is attempting to cheat the breath alcohol sensor is based on the determination of the presence of another face in the field of view.

4 . The system of claim 1 , wherein the determination that the occupant is not blowing or breathing into the breath alcohol sensor is based on an orientation of the face of the occupant or a shape of a mouth of the occupant.

5 . The system of claim 1 , further comprising a radar device configured to emit and receive reflected millimeter waves or ultra wideband (UWB) waves,
wherein the processor is further programmed to:
determine, based on processing of the reflected waves, a radar-based respiration rate of the occupant,
compare the radar-based respiration rate of the occupant with the image-based respiration rate, and
wherein the determining if the occupant is attempting to cheat the breath alcohol sensor is based on the comparison indicating the radar-based respiration rate does not align with the image-based respiration rate.

6 . A system for inhibiting a driver from cheating a vehicle breath alcohol sensor, the system comprising:
a breath alcohol sensor mounted within a vehicle and configured to determine an alcohol concentration of a breath of an occupant of the vehicle; an image sensor mounted within the vehicle and configured to generate images of the occupant within the vehicle; and a processor communicatively coupled to the breath alcohol sensor and the image sensor, the processor being configured to determine whether the occupant is attempting to cheat the breath alcohol sensor, wherein the processor is programmed to:
compare the alcohol concentration of the breath to a threshold,
execute image processing on the images to identify a face of the occupant and determine that the occupant is not blowing or breathing into the breath alcohol sensor,
execute image processing to determine, based on image processing on the images, that the occupant is not blowing or breathing into the breath alcohol sensor, and
determine that the occupant is attempting to cheat the breath alcohol sensor based on (i) the comparison of the alcohol concentration of the breath to the threshold and (ii) the execution of the image processing indicating that the occupant is not blowing or breathing into the breath alcohol sensor indicating that the occupant is not blowing or breathing into the breath alcohol sensor during the comparison of the alcohol concentration of the breath to the threshold, and
determine, based on image processing on the images, an image-based respiration rate of the occupant,
wherein the determination that the occupant is not blowing or breathing into the breath alcohol sensor is based upon the image-based respiration rate of the occupant.

7 . The system of claim 6 , wherein the processor is further programmed to execute image processing on the images to identify a second face of a second occupant and determine that the second occupant is blowing or breathing into the breath alcohol sensor when the alcohol concentration of the breath is being compared to the threshold.

8 . The system of claim 7 , wherein the determining if the occupant is attempting to cheat the breath alcohol sensor is based on the determination that the second occupant is blowing or breathing into the breath alcohol sensor when the alcohol concentration of the breath is being compared to the threshold.

9 . The system of claim 7 , wherein the determination that the second occupant is blowing or breathing into the breath alcohol sensor is based on an orientation of the second face of the second occupant or a shape of a mouth of the second occupant.

10 . The system of claim 6 , wherein the determination that the occupant is not blowing or breathing into the breath alcohol sensor is based on an orientation of the face of the occupant or a shape of a mouth of the occupant.

11 . The system of claim 6 , further comprising a radar device configured to emit radio waves and receive reflected radio waves,
wherein the processor is further programmed to:
determine, based on processing of the reflected radio waves, a radar-based respiration rate of the occupant, and
confirm, based on the radar-based respiration rate of the occupant, that the occupant is not blowing or breathing into the breath alcohol sensor when the alcohol concentration is being compared to the threshold.

12 . The system of claim 6 , further comprising a radar device configured to emit radio waves and receive reflected radio waves,
wherein the processor is further programmed to:
determine, based on processing of the reflected radio waves, a radar-based respiration rate of the occupant, and
compare the radar-based respiration rate of the occupant with the image-based respiration rate,
wherein the determining if the occupant is attempting to cheat the breath alcohol sensor is based on the comparison indicating the radar-based respiration rate does not align with the image-based respiration rate.

13 . The system of claim 6 , wherein the processor is programmed to inhibit driver operation of the vehicle by preventing starting of the vehicle or by preventing th

Assignees

• Valeo Comfort & Driving Assistance

Inventors

• Mathieu Jerome
• Dos-Santos-De-Sa Andre

Classifications

• G06V2201/07

  Target detection · CPC title

• B60W2420/403

  Image sensing, e.g. optical camera · CPC title

• G01S7/415

  Identification of targets based on measurements of movement associated with the target · CPC title

• G01N33/004

  CO or CO2 · CPC title

• G01N22/00

  Investigating or analysing materials by the use of microwaves or radio waves, i.e. electromagnetic waves with a wavelength of one millimetre or more (G01N3/00 - G01N17/00, G01N24/00 take precedence) · CPC title