Development of Breath-Alcohol-Detection System Hitachi, Limited

Format:

Conference/Event

Author/Creator:

Wakana, Wakana, author.

Contributor:

Sakairi, Minoru

Yamada, Masuyoshi

Conference Name:

SAE 2016 World Congress and Exhibition (2016-04-12 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2016

Summary:

The problem of high fatal accident rates due to drunk driving persists, and must be reduced. This paper reports on a prototype system mounted on a car mock-up and a prototype portable system that enables the checking of the drivers' sobriety using a breath-alcohol sensor. The sensor unit consists of a water-vapor-sensor and three semiconductor gas sensors for ethanol, acetaldehyde, and hydrogen. One of the systems' features is that they can detect water vapor from human-exhaled breath to prevent false detection with fake gases. Each gas concentration was calculated by applying an algorithm based on a differential evolution method. To quickly detect the water vapor in exhaled breath, we applied an AC voltage between the two electrodes of the breath-water-vapor sensor and used our alcohol-detection algorithm. The ethanol level was automatically calculated from the three gas sensors as soon as the water vapor was detected. Thus, the system mounted on a car mock-up could more easily measure breath-alcohol concentration immediately after starting of the measurements than conventional alcohol-detection systems, which require blowing through a mouthpiece. Experiments with drunk participants showed good agreement with the results from conventional alcohol-detection systems

Notes:

Vendor supplied data

Publisher Number:

2016-01-1498

Access Restriction:

Restricted for use by site license