ON-VEHICLE MONITORING SYSTEM
To provide an on-vehicle monitoring system that can improve reading accuracy of an RF tag in a vehicle.SOLUTION: An on-vehicle monitoring system 1 comprises a reader unit 10 that conducts wireless communication with an RF tag 51 held by a monitoring object 50 in a car compartment 201, using an RFID;...
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Sprache: | eng ; jpn |
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Zusammenfassung: | To provide an on-vehicle monitoring system that can improve reading accuracy of an RF tag in a vehicle.SOLUTION: An on-vehicle monitoring system 1 comprises a reader unit 10 that conducts wireless communication with an RF tag 51 held by a monitoring object 50 in a car compartment 201, using an RFID; and an ECU 20 that controls the reader unit 10. The reader unit 10 has an antenna part 11 that includes a plurality of antenna elements 11a capable of forming different antenna directionality. The antenna part 11 is configured to, with respect to a plurality of monitor areas 12 in the car compartment 201, form the different antenna directionality in accordance with a location of each monitor area 12, and transmit different radio waves of frequencies f1 to f3 for each monitor area 12 a plurality of times. The RF tag 51 is configured to return a responce signal with respect to the radio wave to the reader unit 10 via the antennal part 11. The ECU 20 is configured to monitor the monitoring object 50 on the basis of the responce signal received by the reader unit 10 from the RF tag 51.SELECTED DRAWING: Figure 4
【課題】車両内のRFタグの読み取り精度を向上させることができる車載監視装置を提供する。【解決手段】車載監視装置1は、車室201内の監視対象物50が保持するRFタグ51との間でRFIDを利用して無線通信を行うリーダ部10と、リーダ部10を制御するECU20とを備える。リーダ部10は、異なるアンテナ指向性を形成することが可能な複数のアンテナ素子11aを含むアンテナ部11を有する。アンテナ部11は、車室201内の複数の監視領域12に対して、各監視領域12の位置に応じた異なるアンテナ指向性を形成し、かつ、監視領域12ごとに異なる周波数f1〜f3の電波を複数回送信する。RFタグ51は、電波に対する応答信号をアンテナ部11を介してリーダ部10に返信する。ECU20は、リーダ部10がRFタグ51から受信した応答信号に基づいて監視対象物50の監視を行う。【選択図】図4 |
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