发明名称 INTERPHONE UNIT
摘要 PROBLEM TO BE SOLVED: To conduct a predetermined operation by well sensing a visitor without using a human body sensing sensor even when any entrance is installed without selecting installing conditions. SOLUTION: An infrared LED 4 is provided separately at a predetermined distance from a CCD 3b and a CCD 3b in an entrance unit 1, and an image processing unit 14 and a decision unit 15 are provided at a habitable room terminal 11. The LED 4 periodically emits a ray, calculates a difference between the image picked up at the LED 4 off time immediately before the emission and the image imaged at the emission time and specifies the position of a reflected ray arriving at the CCD 3a by reflecting on a matter to be reflected. A distance between the position of the specified ray and a center of an element of the CCD 3b is measured, and a distance between the matter to be reflected and the unit 1 is calculated by the processing unit 14. The calculated distance is compared with a preset reference distance by the decision unit 15, and if the calculated distance falls within the reference distance, it is determined that there is a visitor. COPYRIGHT: (C)2004,JPO
申请公布号 JP2003284055(A) 申请公布日期 2003.10.03
申请号 JP20020086705 申请日期 2002.03.26
申请人 AIPHONE CO LTD 发明人 YASUDA KAZUHIRO
分类号 H04N7/18;H04M9/00;(IPC1-7):H04N7/18 主分类号 H04N7/18
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