(19)
(11)EP 3 617 738 A3

(12)EUROPEAN PATENT APPLICATION

(88)Date of publication A3:
22.07.2020 Bulletin 2020/30

(43)Date of publication A2:
04.03.2020 Bulletin 2020/10

(21)Application number: 19191774.9

(22)Date of filing:  14.08.2019
(51)International Patent Classification (IPC): 
G01S 7/41(2006.01)
G01S 13/56(2006.01)
(84)Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA ME
Designated Validation States:
KH MA MD TN

(30)Priority: 31.08.2018 CN 201811010625

(71)Applicant: Shenzhen Merrytek Technology Co., Ltd
518127 Shenzhen (CN)

(72)Inventors:
  • ZOU, Gaodi
    Shenzhen, 518127 (CN)
  • ZOU, Xin
    Shenzhen, 518127 (CN)
  • ZOU, Mingzhi
    Shenzhen, 518127 (CN)

(74)Representative: Casalonga 
Casalonga & Partners Bayerstraße 71/73
80335 München
80335 München (DE)

  


(54)HUMAN PRESENCE DETECTOR AND HUMAN PRESENCE DETECTION METHOD THEREOF


(57) A human presence detector includes a microwave generator, a microwave receiver, a frequency mixing wave detector and a signal processor. The microwave generator is configured to emit and transmit a detecting microwave in a detection space. The microwave receiver is configured to receive a corresponding echo of the detecting microwave. The frequency mixing wave detector, linked to the microwave generator and the microwave receiver, is configured to perform a frequency mixing wave detection on the detecting microwave and the corresponding echo of the detecting microwave to output a primary detecting signal. The signal processor linked to the frequency mixing wave detector is configured to select a fluctuation signal at a predetermined frequency range in the primary detecting signal to amplify and output a secondary detecting signal. Accordingly, in response to the detection of the motion at the predetermined frequency range, a human (living) body is detected and determined in the detection space.







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