Patent ID: 7864058
Filing Date: 2011-01-04
Classification: G08B

Abstract:
1. A danger determining device comprising: an article detecting means for detecting an ID and position information of an article in an environment to be watched over; a person detecting means for detecting an ID and position information of a person in the environment to be watched over; a sensing history database for storing the ID and the position information of the article detected by the article detecting means and the ID and the position information of the person detected by the person detecting means along with respective times; a dangerous article database for storing dangerous combination information in which an ID of a dangerous article, which is an article having a possibility of posing danger, of the articles in the environment to be watched over, and an ID of a person, who may be present in the environment to be watched over, are associated; an accessible location database for storing information on accessible locations in the environment to be watched over for every ID of a person who may be present in the environment to be watched over; an article-leaving-operation determining means for determining that the person has left the article when the position of the article and the position of the person are apart by more than a predetermined distance from the ID, the position information, and the time of the article as well as the ID, the position information, and the time of the person stored in the sensing history database; a left-article danger degree determining means for performing a first determination of determining whether a combination of the ID of the person in the environment to be watched over and the ID of the article determined as being left by the article-leaving-operation determining means stored in the sensing history database matches the dangerous combination information of the ID of the dangerous article and the ID of the person stored in the dangerous article database; a second determination of determining whether or not the person in the environment to be watched over is capable of accessing the position of the article determined as being left by the article-leaving-operation determining means, from the ID and the position information of the person in the environment to be watched over and the ID and the position information of the article determined as being left by the article-leaving-operation determining means, which are stored in the sensing history database, and the information on the accessible location of the person stored in the accessible location database; and determining that the article determined as being left by the article-leaving-operation determining means poses danger by being left when determined as matching in the first determination and determined as accessible in the second determination in the left-article danger degree determining means; and a notification means for providing a danger notification when the left-article danger degree determining means determines that the left article poses danger.