Patent ID: 11947029
Assignee: KOREA INSTITUTE OF ENERGY RESEARCH
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 10:
11. A system for detecting occupants, comprising:
a first beacon, which is installed in a first space partitioned by a bulkhead in a building, and configured to transmit a 1-1 signal at a first transmission strength, and then, transmit a 1-2 signal at a second transmission strength;
a second beacon, which is installed to be spaced apart from the first beacon by a predetermined distance in the first space, and configured to transmit a 2-1 signal at the first transmission strength, and then, transmit a 2-2 signal at the second transmission strength; and
a device for detecting occupants configured to receive 1-1 reception strength information of the 1-1 signal, 1-2 reception strength information of the 1-2 signal, 2-1 reception strength information of the 2-1 signal, and 2-2 reception strength information of the 2-2 signal from a communication terminal receiving signals transmitted from the first beacon and the second beacon, estimate whether the communication terminal is located in the first space and detect a number of occupants in the first space, by comparing cosine similarity for a first vector, calculated by using the 1-1 reception strength information and the 2-1 reception strength information, and a second vector, calculated by using the 1-2 reception strength information and the 2-2 reception strength information, with a preset reference value,
wherein the device for detecting occupants is further configured to increase the number of occupants in the first space by 1 after estimating that the communication terminal is located in the first space when the cosine similarity is equal to or greater than the preset reference value, and
wherein the device for detecting occupants is further configured to adjust at least one condition among a wind speed, a wind direction, a temperature, and a humidity of an air conditioning device installed in the first space according to the number of occupants in the first space.