US 2003/0117279 A1 · Device and system for detecting abnormality

Abstract

An abnormality detection device 30 includes small motion sensors 25a˜25c that detect small motions of a person in a house, a data collecting unit 32 that collects and stores sensor signals from the small motion sensors 25a˜25c as sensor patterns, a Markov chain operating unit 33 that transforms the sensor patterns into a cluster sequence by vector-quantizing input patterns which are obtained by averaging and normalizing the sensor patterns and calculates a transition number matrix and a duration time distribution of a Markov chain and so on using a Markov chain model, a comparing unit 34 that calculates characteristic amount (Euclid distance and average log likelihood in appearance frequency of a Markov chain and average log likelihood to the duration time distribution of a Markov chain) of a sample activity as against a daily activity based on the obtained transition number matrix and the duration time distribution and so on, and others.

Claims45

Dependent claims

An abnormality detection device that detects occurrence of abnormality in an event under observation, comprising:

an input unit operable to acquire a sequence of an input pattern that is data which depends upon the event;
a transition analyzing unit operable to analyze a characteristic of a transition in the acquired sequence of the input pattern;
a comparing unit operable to compare the analyzed characteristic of the transition with a predetermined reference value, and judge that abnormality has occurred in the event when the characteristic and the reference value are not approximate to each other within a predetermined range;
and
an output unit operable to output occurrence of abnormality when the comparing unit judges that abnormality has occurred.

2 more elements

An abnormality detection system comprising:

an abnormality detection device that is placed in a place where an event for abnormality detection occurs;
a communication device that monitors occurrence of abnormality;
and
a transmission channel that connects the abnormality detection device and the communication device,
wherein the abnormality detection device includes:
an input unit operable to acquire a sequence of an input pattern that is data which depends upon the event;
a transition analyzing unit operable to analyze a characteristic of a transition in the acquired sequence of the input pattern;
a comparing unit operable to compare the analyzed characteristic of the transition with a predetermined reference value, and judge that abnormality has occurred in the event when the characteristic and the reference value are not approximate to each other within a predetermined range;
and
an output unit operable to output occurrence of abnormality when the comparing unit judges that abnormality has occurred, and
the communication device includes:
a receiving unit operable to receive a report from the abnormality detection device;
and
a showing unit operable to show an operator the receipt of the report when the receiving unit receives the report.

11 more elements

An abnormality detection system comprising:

an abnormality detection device that is placed in a place where an event for abnormality detection occurs;
a communication device that monitors occurrence of abnormality;
and
a transmission channel that connects the abnormality detection, device and the communication device,
wherein the abnormality detection device includes:
an input unit operable to acquire a sequence of an input pattern that is data which depends upon the event;
and
a sending unit operable to send the acquired input pattern to the communication device via the transmission channel, and
the communication device includes:
a receiving unit operable to receive the input pattern sent from the abnormality detection device;
a transition analyzing unit operable to analyze a characteristic of a transition in the acquired sequence of the input pattern;
a comparing unit operable to compare the analyzed characteristic of the transition with a predetermined reference value, and judge that abnormality has occurred in the event when the characteristic and the reference value are not approximate to each other within a predetermined range;
and
a showing unit operable to show an operator the occurrence of abnormality when the comparing unit judges that abnormality has occurred.

11 more elements

An abnormality detection method for detecting occurrence of abnormality in an event under observation, comprising:

an inputting step for acquiring a sequence of an input pattern that is data which depends upon the event;
a transition analyzing step for analyzing a characteristic of a transition in the acquired sequence of the input pattern;
a comparing step for comparing the analyzed characteristic of the transition with a predetermined reference value, and judging that abnormality has occurred in the event when the characteristic and the reference value are not approximate to each other within a predetermined range;
and
an outputting step for outputting occurrence of abnormality when the comparing unit judges that abnormality has occurred.

2 more elements

Dependencies are inferred from the claim text.

Device and system for detecting abnormality

Life of this patent

Device and system for detecting abnormality

Life of this patent

Abstract

Claims45