To provide a mobile object detection device capable of expanding a monitoring space and reducing a blind space while suppressing increase in a number of components and enlargement in size of the device.
A mobile object detection device comprises: an oscillation circuit 3; two transducers 1 and 2; phase detection circuits 6A and 6B for obtaining a pair of Doppler signals E3 and E4 having mutually different phases by mixing received signals E0 with reference signals E1 and E2, which have the same frequency as a transmitted signal and mutually different phase; a signal processing unit 8 for signal processing the pair of Doppler signals E3 and E4, and detecting movement of an object A1 in a monitoring space to output a detection signal; and an inverting circuit 5 for outputting an inverted signal by inverting the transmitted signal outputted from the oscillation circuit 3. In the mobile object detection device, the transmitted signal is inputted into the transducer 1, the inverted signal is inputted into the other transducer 2, the transducers 1 and 2 are connected in series, and the received signal E0 is extracted from a midpoint of a connection path.
FUJIKAWA HIDEHIKO
MORI TAKUYA
MUGIUDA TORU
MINAMINO MOTOHIRO
Mizuhiji Katsuhisa
Takeshi Sakaguchi
Hidetoshi Kitade
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