Asahi Kasei Microdevices Corporation

Henrik Rodjegard

Yuji Goda

Hans Martin

Maksym Bryzgalov

Mats Olsson

A change rate of in-vehicle carbon dioxide concentration at an optional time point when the vehicle is in a parked state is estimated on the basis of detection signals of a COconcentration sensor at two different time points when in the parked state; and on the basis of a detection signal of the COconcentration sensor at the optional time point, a preset time constant of concentration change of the in-vehicle carbon dioxide concentration, and the estimated change rate, the in-vehicle carbon dioxide concentration at a time point when a predetermined time according to the time constant has elapsed since the optional time point is estimated (steps Sto S). A detection target organism is determined to be present in the vehicle when the estimated in-vehicle carbon dioxide concentration is equal to or more than a threshold value set according to the detection target organism (steps Sand S).

In-vehicle abnormality detection device and in-vehicle abnormality detection method

The present invention is directed to a gas detector configured to improve response speed of a gas sensor. A gas detector includes a housing, a gas sensor main body installed in the housing, and a partition wall provided in the housing and limiting the surrounding of the gas sensor main body to separate from the other area. The housing or the partition wall includes an opening portion directly connected from the outside to an area inside the partition wall.

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Delsbo, Sweden

Henrik Rodjegard