Humidity measuring device

A humidity measuring device located at a vehicle, comprising:

• a humidity sensor configured to detect a humidity of an air;
• and
• at least one processor configured to perform:
• acquiring a variation quantity of the humidity with time or a humidity information that is information relating to the variation quantity of the humidity with time,
• acquiring a vehicle information including at least one of information indicating a driving state of the vehicle or information of an attachment environment of the humidity sensing unit,
• setting a threshold for determining whether water is adhered to the humidity sensing unit, based on the vehicle information, and
• comparing the humidity information with the threshold and determining that water is adhered to the humidity sensing unit when the humidity information reaches the threshold.

A humidity measuring device located at a vehicle, comprising:

• a humidity sensing means for detecting a humidity of an air;
• a humidity information acquisition means for acquiring a variation quantity of the humidity with time or a humidity information that is information relating to the variation quantity of the humidity with time;
• a vehicle information acquisition means for acquiring a vehicle information including at least one of information indicating a driving state of the vehicle or information of an attachment environment of the humidity sensing unit;
• a threshold setting means for setting a threshold for determining whether water is adhered to the humidity sensing unit, based on the vehicle information;
• and
• an adhesion determination means for comparing the humidity information with the threshold, the adhesion determination means for determining that water is adhered to the humidity sensing unit when the humidity information reaches the threshold.