▪ US Patent No. 8,410,445 (LINUDIX CO., LTD.)
발명의 명칭: HUMAN BODY SENSING APPARATUS WITH IMPROVED ACCURACY
대표도면:
대표독립항:
1. A human body sensing apparatus for detecting the number of people staying in an indoor space by sensing a human body moving in and out of the indoor space, the apparatus comprising: a plurality of sensor units for sensing the human body in areas sequentially set from an entrance toward inside of the indoor space; a movement state determination module including a plurality of analysis means for receiving sensing signals outputted from the plurality of sensor units and detecting whether a moving direction of the human body is an `entry` direction from the entrance into the indoor space or an `exit` direction, outputting a `determinate entry` signal if all the moving directions detected by the plurality of analysis means are the `entry` direction, and outputting a `determinate exit` signal if all the moving directions detected by the plurality of analysis means are the `exit` direction; and a count and correction module for increasing the number of people staying in the room by `1` whenever the `determinate entry` signal is inputted from the movement state determination module, and decreasing the number of people staying in the room by `1` whenever the `determinate exit` signal is inputted, wherein the movement state determination module outputs an `indeterminate entry` signal if the `entry` or `exit` directions detected by the plurality of analysis modules for the check time do not correspond and the number of the `entry` directions detected by the plurality of analysis modules is larger than the number of the `exit` directions, and outputs an `indeterminate exit` signal if the number of the `exit` directions is larger than the number of the `entry` directions, and wherein the count and correction module calculates an `indeterminate number of people staying in the room` by adding `1` to the number of people staying in the room if the `indeterminate entry` signal is received and subtracting `1` from the number of people staying in the room if the `indeterminate exit` signal is received, corrects the `indeterminate number of people staying in the room` by decreasing the `indeterminate number of people staying in the room` by `1` at every predetermined IDLE time while the sensing signal is not generated, and if the sensing signal is generated, decreasing the `indeterminate number of people staying in the room` by `1` based on detection of the `determinate exit` signal and the `indeterminate exit` signal, and increasing the `indeterminate number of people staying in the room` by `1` based on detection of the `determinate entry` signal and the `indeterminate entry` signal.
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