VEHICLE SEAT

• Main Author: ONUMA MASAHIKO
• Format: Patent
• Language: English; Japanese
• Published: 23.02.2017
• Subjects: DIAGNOSIS; HUMAN NECESSITIES; HYGIENE; IDENTIFICATION; MEDICAL OR VETERINARY SCIENCE; PERFORMING OPERATIONS; SEATS SPECIALLY ADAPTED FOR VEHICLES; SURGERY; TRANSPORTING; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDEDFOR; VEHICLES IN GENERAL

PROBLEM TO BE SOLVED: To improve detection accuracy of voice and heartbeat sound of an occupant.SOLUTION: When recognizing a voice PV of an occupant, a detector 60 detects pressure fluctuation in a measurement bag body 30A with the measurement bag body 30A opened to atmosphere. Consequently, any band width of the pressure fluctuation in the measurement bag body 30A is transmitted to the detector 60 without any attenuation so as to clearly detect the voice PV. Further, sound other than the voice PV is shielded by a human body of the occupant so as to improve the accuracy of the detection of the voice PV. When measuring a heartbeat sound PW of the occupant, the detector 60 detects pressure fluctuation in the measurement bag body 30A, with the measurement bag body 30A sealed. Consequently, high-frequency components of the pressure fluctuation in the measurement bag body 30A is attenuated and transmitted to the detector 60, so that components of less than 100 zHz as a center frequency of the heartbeat sound PW in the whole pressure fluctuation are relatively many so as to improve the detection accuracy of the heartbeat sound PW.SELECTED DRAWING: Figure 5 【課題】乗員の音声及び心拍音の検出精度を向上させる。【解決手段】乗員の音声ＰＶを認識する場合は、測定袋体３０Ａが大気開放された状態で測定袋体３０Ａの圧力変動を検出装置６０で検出する。よって、測定用袋体３０Ａの圧力変動のどの帯域も減衰することなく検出装置６０に伝達されるので、音声ＰＶを明瞭に検出することができる。また、音声ＰＶ以外の音は乗員の人体が遮蔽するので、音声ＰＶの検出の精度が向上する。乗員の心拍音ＰＷを測定する場合は、測定袋体３０Ａが密閉された状態で測定袋体３０Ａの圧力変動を検出装置６０で検出する。よって、測定袋体３０Ａの圧力変動の高周波成分が減衰されて検出装置６０に伝達されるので、圧力変動全体における心拍音ＰＷの中心周波数である１００ｚＨｚ以下の成分が相対的に多くなり、心拍音ＰＷの検出精度が向上する。【選択図】図５