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    • 5. 发明授权
    • Sensor and method for manufacturing the same
    • 传感器及其制造方法
    • US07080543B2
    • 2006-07-25
    • US10409587
    • 2003-04-09
    • Hideki IshikawaYoshikuni SatoKeigo BannoMasashi SakamotoNoboru IshidaTakafumi Oshima
    • Hideki IshikawaYoshikuni SatoKeigo BannoMasashi SakamotoNoboru IshidaTakafumi Oshima
    • G01N29/02
    • G01N29/223G01N2291/021G01N2291/02809G01N2291/02818G01N2291/02881
    • A detecting-element assembly (40) is configured such that a piezoelectric element (51) is housed in a casing body portion (43) of a casing (42), and is attached to a housing portion (22) of a flow path formation member (20) via a flange portion (41). Therefore, the path between the piezoelectric element (51) and the position of attachment of the detecting-element assembly (40) is elongated, whereby ultrasonic waves which leak into the interior of the detecting-element assembly (40) from the piezoelectric element (51) become unlikely to reflectively return from a joint. Thus, the influence of, for example, noise stemming from reflected waves is reduced, thereby enhancing the accuracy of detection. An average clearance of 1 millimeter or more is provided along the outer circumferential surface of the casing body portion (43) of the detecting-element assembly (40), whereby a problem of collected foreign matter is unlikely to occur.
    • 检测元件组件(40)构造成使得压电元件(51)容纳在壳体(42)的壳体主体部分(43)中,并且附接到流路形成的壳体部分(22) 构件(20)经由凸缘部分(41)。 因此,压电元件(51)与检测元件组件(40)的安装位置之间的路径被拉长,从而从压电元件(...)泄漏到检测元件组件(40)的内部的超声波 51)变得不可能从联合反射回来。 因此,降低了例如由反射波产生的噪声的影响,从而提高了检测的准确性。 沿着检测元件组件(40)的壳体主体部(43)的外周面设置有1毫米以上的平均间隙,由此不可能发生收集的异物问题。
    • 7. 发明授权
    • Gas concentration sensor
    • 气体浓度传感器
    • US06892566B2
    • 2005-05-17
    • US10393496
    • 2003-03-21
    • Masashi SakamotoYoshikuni SatoHideki IshikawaKeigo BannoNoboru Ishida
    • Masashi SakamotoYoshikuni SatoHideki IshikawaKeigo BannoNoboru Ishida
    • G01N29/024G01N29/22G01N29/44G01N29/02G01H5/00
    • G01N29/222G01N29/024G01N2291/011G01N2291/015G01N2291/0212G01N2291/0217G01N2291/02809G01N2291/045G01N2291/101
    • A gas concentration sensor includes a measurement chamber for measuring a concentration of a specific gas component in a gas under measurement; an inflow path for allowing inflow of the gas under measurement thereinto and an outflow path for allowing outflow of the gas under measurement therefrom; a reflection wall for reflecting an acoustic wave; and an acoustic wave transmitting-receiving element having a transmitting-receiving surface adapted to transmit an acoustic wave toward the reflection wall and receive an acoustic wave reflected from the reflection wall. The concentration of the specific gas in the gas under measurement is detected on the basis of a propagation time between transmission of the acoustic wave and reception of the reflected acoustic wave. When a predetermined member having the sensor attached thereto is placed in a horizontal plane, the transmitting-receiving surface faces downward. A recess is formed in a peripheral portion of the reflection wall. The recess is receded toward a back surface of the reflection wall, namely, in a direction away from the transmitting-receiving surface.
    • 气体浓度传感器包括用于测量被测气体中特定气体成分浓度的测量室; 用于允许在其中测量气体的流入的流入路径和用于允许从其测量的气体流出的流出路径; 用于反射声波的反射壁; 以及具有发射接收表面的声波发射接收元件,所述发射接收表面适于向反射壁传输声波并接收从反射壁反射的声波。 基于声波的发送和反射声波的接收之间的传播时间来检测被测气体中的比气体的浓度。 当安装有传感器的预定构件放置在水平面中时,发送接收表面向下。 在反射壁的周边部分形成有凹部。 凹部朝向反射壁的后表面,即远离发射接收表面的方向退回。