To realize distance measurement with high accuracy without increasing a sampling rate.SOLUTION: A passive entry device 10 used in a vehicle 50 is provided. The passive entry device 10 comprises: a transmission part 13 for outputting a transmission signal in a first frequency bandwidth modulated by a transmission data signal; a receiving part 14 for receiving as a receiving signal a signal in a second frequency bandwidth output simultaneously with the transmission signal from a key device; and a control part 12 for shaping the transmission data signal and the receiving data signal obtained by demodulating the receiving signal into a sinusoidal signal, generating each of a first analysis signal and a second analysis signal using the transmission data signal and the receiving data signal shaped into the sinusoidal signal, and calculating a phase difference using the first analysis signal and the second analysis signal to measure a distance between the key device and the vehicle.SELECTED DRAWING: Figure 2

    【課題】サンプリングレートを上げることなく、高い精度で距離測定を実現すること。【解決手段】車両50に用いられるパッシブエントリー装置10が提供される。パッシブエントリー装置10は、送信データ信号により変調された第1の周波数帯域の送信信号を出力する送信部13と、送信信号に同期してキー装置から出力される第2の周波数帯域の信号を受信信号として受信する受信部14と、送信データ信号と受信信号を復調して得られる受信データ信号とを正弦波信号に整形し、正弦波信号に整形された送信データ信号と受信データ信号とを用いて第1の解析信号と第2の解析信号をそれぞれ生成し、第1の解析信号と第2の解析信号とを用いて位相差を算出して、キー装置と車両との間の距離を測定する制御部12とを備える。【選択図】図2


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    Title :

    VEHICLE PASSIVE ENTRY DEVICE AND DISTANCE MEASUREMENT METHOD FOR VEHICLE PASSIVE ENTRY DEVICE


    Additional title:

    車両用パッシブエントリー装置および車両用パッシブエントリー装置における測距方法


    Contributors:

    Publication date :

    2020-03-19


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    G01S RADIO DIRECTION-FINDING , Funkpeilung / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR / H04B TRANSMISSION , Übertragung



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