作者: Osamu Isaji , Tamio Saito
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摘要: A high frequency signal, which is produced in a oscillator, modulated by from modulating signal generated modulation generator and radiated sending antenna. reflected target object received receiving antenna, frequency-converted local oscillating directional coupler the convertor. Then, distance speed information detected processing unit. modulator, connected to modulates oscillator output order detect failure. detection unit, filter rectification circuit, voltage comparison circuit are included, detects elements originated above described modulator. The unit makes failure determination based on have already been detected.