To solve the problems that a contamination possibility of a sound other than siren when setting a pass band of a BPF to a wide band is increased, and therefore, the setting of an accurate BPF pass band is required in order to accurately detect the siren.SOLUTION: An emergency vehicle approach detection device comprises: a vehicle speed acquisition part that acquires a vehicle speed of an own vehicle; a sound collection part that collects an environment signal; an AD converted that converts the environment signal collected by the sound collection part into a digital signal; a filter that makes a signal of a specific frequency contained in the digital signal pass; a coefficient update part that changes a coefficient of the filter in accordance with the vehicle speed; an amplification detection device that detects an amplification pattern of the signal passed through the filter; an amplification pattern detection device that detects a coincidence of an alarm sound collected in advance and the amplification pattern; and an alarm part that outputs an alarm on the basis of the coincidence.SELECTED DRAWING: Figure 1

    【課題】BPFの通過帯域を広帯域に設定するとサイレン以外の音声の混入可能性が上昇する。従って、正確にサイレンを検出するためには的確なBPF通過帯域の設定が必要である。【解決手段】本発明の緊急車両接近検知装置は、自車の車速を取得する車速取得部と、環境信号を収集する集音部と、集音部が収集した環境信号をディジタル信号に変換するAD変換器と、ディジタル信号に含まれる特定周波数の信号を通過させる濾波器と、濾波器の係数を車速に応じて変更する係数更新部と、濾波器を通過した信号の振幅パターンを検知する振幅検出器と、予め収集された警報音と振幅パターンとの一致度を検知する振幅パターン検知器と、一致度に基づいて警告を出す警告部と、を備えたことを特徴とする。【選択図】 図1


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    Title :

    EMERGENCY VEHICLE APPROACH DETECTION DEVICE


    Additional title:

    緊急車両接近検知装置


    Contributors:

    Publication date :

    2020-10-01


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    H04R LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS , Lautsprecher, Mikrofone, Schallplatten-Tonabnehmer oder ähnliche akustische, elektromechanische Wandler / G08G Anlagen zur Steuerung, Regelung oder Überwachung des Verkehrs , TRAFFIC CONTROL SYSTEMS



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