To provide a moving object detection sensor with which it is possible to detect a moving object with high sensitivity by a simple configuration.SOLUTION: A moving object detection sensor 10 comprises a distributor 12 for distributing a reference signal as two signals, a receive antenna for receiving one of reference signals via a cable 13 that are distributed by the distributor 12, level adjustment means 14, and a phase shifter 15 for cyclically changing the phase of the reference signal. The other of the reference signals distributed by the distributor 12 is radiated toward an external detection space. The level adjustment means 14 and the phase shifter 15 are adjusted in advance by a computer 22 so that a minimum level signal cyclically formed as the two signals distributed while no moving object exists in the detection space and an ambient environment does not change cancel out each other, is obtained as a steady signal pattern by a received level detector 17. A disturbance pattern signal synthesized from a reflected signal temporally caused to occur by entry of a moving object into the external detection space and the reference signal routed via cable by a synthesizer 16 is compared with the steady signal pattern by the computer 22, and the moving object having entered the detection space is detected.SELECTED DRAWING: Figure 2
【課題】簡単な構成で高感度に移動体を検出できる移動体検知センサーを提供する。【解決手段】移動体検知センサー10は、基準信号を2つの信号として分配する分配器12と、分配器12によって分配された基準信号のうちの一方をケーブル13経由で受信し、レベル調整手段14と周期的に位相を変化させる移相器15とを含む。分配器12で分配された基準信号の他方は、外部の検出空間へ向けて放射される。予め、検出空間に移動体が存在せず、周囲環境が変化しない状態で分配された2つの信号が打ち消し合って周期的に形成される最小レベル信号を受信レベル検出器17が定常信号パターンとして得られるようにレベル調整手段14と移相器15をコンピュータ22で調整し、外部の検出空間への移動体の侵入によって一時的に生じる反射信号とケーブル経由の基準信号が合成器16で合成された外乱パターン信号を定常信号パターンとコンピュータ22が比較して、検出空間に侵入した移動体を検出する。【選択図】図2
MOVING OBJECT DETECTION SENSOR
移動体検知センサー
2019-12-26
Patent
Electronic Resource
Japanese
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