Foreground subject-identifying apparatus

Details Foreground subject-identifying apparatus Foreground subject-identifying apparatus

G - Physics

01

S

343/19

G01S 13/74 (2006.01) G01S 13/75 (2006.01)

Patent

CA 1160721

- 15 - Abstract of the Disclosure A foreground subject-identifying apparatus includes a signal transmitter for sending forth microwave question signals; a code signal generator for emitting a code signal in response to a question signal delivered from the signal transmitter; and signal-receiving device for interpreting code signal received from the code signal generator. The signal transmitter intermittently generates a microwave check signal in a first operation mode, and sends forth a microwave question signal in a second operation mode. The code signal generator sends forth an output signal in response to a check signal delivered from the signal transmitter, and then the signal receiver causes the signal transmitter to be set at the second operation mode to generate a question signal.

371726

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