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Sober Driver - Sensor inVehicles

At Senseair, we have a group entirely dedicated to the development of alcohol sensing technology and applications. Our core competency lies in the areas of sensor technology, measurement systems, microsystems, physiological interactions, mechatronic design, and man-machine interfacing.

We have a well-equipped laboratory for prototyping, small-scale production, and testing. Together with a network of partners, we are capable of managing projects from idea to production. 

If you wish to read more about the Senseair R&D department, please visit Research & Development. 

Technology

In today's state-of-the-art breath analysers, the subject has to deliver a forced and prolonged expiration into a mouthpiece. This procedure is time-consuming and requires significant effort for people with reduced lung capacity. For hygienic reasons, mouthpieces have to be exchangeable, disposable and taken care of.

With our technology, the subject can deliver a short puff of air at 5-10 cm distance from the sensor. By correlation to simultaneous measurement of CO, the true breath alcohol concentration can be determined using the equation:

Due to the relatively small variability of the undiluted CO₂-concentration between individuals, the measured diluted breath alcohol (BrAC) concentration can be normalized using the dilution factor (COundiluted/COdiluted), thus representing the undiluted value.

Both alcohol and CO are measured using non-dispersive infrared spectroscopy (NDIR). We have built a powerful technology platform for NDIR analyzers. On top of that, a flexible user interface enabling a multitude of breath analyser configurations to be generated.

Learn More About Sensor inVehicles

DADSS

In the field of automotive safety systems, we enjoy close cooperation with Autoliv, a leading global supplier of those kinds of systems.

Our current projects include the development of new technology to allow contact-free, unobtrusive measurement of a driver’s breath alcohol.

Watch our technology being given a test drive in the news report here (in Swedish).

 

DADSS RESEARCH PROGRAM

The Driver Alcohol Detection System for Safety (DADSS) research program video illustrates the two different technologies being developed for vehicle integration - ours is the breath-based technology.

 

Technology

In today's state-of-the-art breathalysers, the subject has to deliver a forced and prolonged expiration into a mouthpiece. This procedure is time-consuming and requires significant effort for people with reduced lung capacity. For hygienic reasons, mouthpieces have to be exchangeable, disposable and taken care of.

With our technology, the subject can deliver a short puff of air at 5-10 cm distance to the sensor. By correlation to simultaneous measurement of CO, the true breath alcohol concentration can be determined using the equation:

Due to the relatively small variability of the undiluted CO concentration between individuals, the measured diluted breath alcohol (BrAC) concentration can be normalized using the dilution factor (COundiluted/COdiluted), thus representing the undiluted value.

Both alcohol and CO are measured using non-dispersive infrared spectroscopy (NDIR). We have built a powerful technology platform for NDIR analyzers and, on top of that, a flexible user interface enabling a multitude of breath analyzer configurations to be generated.

An extensive list of publications covering both the technology and the analysis of BAC in medical and sobriety testing applications can be found below.

 

Publications

THE TECHNOLOGY

Unobtrusive Breath Alcohol Sensing System
Hök, B., Pettersson, H. & Ljungblad, J. Presented at the 24th International Conference on the Enhanced Safety of Vehicles, Gothenburg, Sweden, 8-11 June 2015. Paper No. 15-0458.

 

Unobtrusive and Highly Accurate Breath Alcohol Analysis Enabled by Improved Methodology and Technology
Hök, B., Ljungblad, J., Andersson, AK., Ekström, M. & Enlund, M. In Journal of Forensic Investigation, vol. 2 issue 4, 2014.

 

Improved Breath Alcohol Analysis with use of Carbon Dioxide as the Tracer Gas
Kaisdotter Andersson, A., PhD thesis No. 83, Mälardalen University Press, 2010.

 

Methodology investigation of expirograms for enabling contact free breath alcohol analysis

Jonsson, A., Hök, B., Andersson, L. & Hedenstierna, G. In Journal of Breath Research vol. 3 no. 3, 2009.

 

Influences from breathing pattern on alcohol and tracer gas expirograms – Implications for alcolock use
Kaisdotter Andersson, A., Hök, B., Ekström, M. & Hedenstierna, G. In Forensic Science International, vol. 206, 2010. 

 

High Performance Breath Alcohol Analysis

Ljungblad, J. Doctoral dissertation, Mälardalen University, 2017.

 

Contactless measurement of breath alcohol

Hök, B., Pettersson, H. & Andersson, G. Presented at the Microstructure Workshop 2006, Västerås, Sweden, 10 May 2006.

 

 

UNOBTRUSIVE BREATH ANALYSIS IN MEDICAL CARE & FOR SOBRIETY TESTING

Assessment of the breath alcohol concentration in emergency care patients with different level of consciousness.
Kaisdotter Andersson et al. In Scandinavian Journal of Trauma, Resuscitation and Emergency Medicine 23:11, 2015.

 

Unobtrusive Breath Testing
Kaisdotter Andersson et al. Presented at the 20th International Council on Alcohol, Drugs and Traffic Safety (ICADTS) Conference, Brisbane, Australia, 28-30 August 2013.

 

Improved breath alcohol analysis in patients with depressed consciousness

Kaisdotter Andersson et al. In Medical & Biological Engineering & Computing, vol. 48 issue 11, pp. 1099-1105, 2010.

 

Development of a breath alcohol analyzer for use on patients in emergency care

Jonsson, A., Hök, B. & Ekström, M. Presented at the World Congress on Medical Physics & Biomedical Engineering, in München, Germany, 11-15 September 2009.

 

Alkolås – vad förutspår vi i framtiden?
Hök, B. Presented at Trafikverkets Nollvisionskonferens, 28 April 2011. (SWE)

 

Breath Analyzer for Alcolock and Screening Devices
Hök et al. In IEEE Sensors Journal 10:10-15, 2010.

 

Drowsy driving: Risks, evaluation, and management

Gurubhagavatula, I. (2018).

 

Configure your own solution

There are three simple steps from Sensor Core to a finished inCase solution. Choose your adaptable platforms and add all the features you need.

1

Choose your Sensor Core platform

2

Add features to your Sensor onBoard

3

Design your Sensor inCase