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    Rolamite sensor
    2.
    发明授权
    Rolamite sensor 失效
    罗兰米特传感器

    公开(公告)号：US5036304A

    公开(公告)日：1991-07-30

    申请号：US500691

    申请日：1990-03-28

    申请人： Richard J. Russell ,  Freddie E. Hunt ,  Frank K. Chung

    发明人： Richard J. Russell ,  Freddie E. Hunt ,  Frank K. Chung

    IPC分类号： G01P15/135 ,  G01P21/00 ,  H01H35/14

    CPC分类号： H01H35/148 ,  G01P15/135 ,  G01P21/00

    摘要： A rolamite sensor for use in sensing deceleration of a vehicle includes two separate electrical circuits for actuating two occupant restraints such as air bags. The sensor has a molded plastic base mounted on a metal chassis and a metal cover welded to the chassis to sealingly enclose the base. One surface of the base acts as a guide surface for a roller. A pair of thin metal bands are wrapped around the roller. Each band is fixed at one end to the base and at the other end to a J-shaped tensioner underneath the base. The roller is rollable on the guide surface under an applied force to cause the band to engage firing contacts to complete the electrical circuits. An optical electromagnet may be fixed to the chassis without increasing the overall size of the sensor. The electromagnet is selectively operable to attract the roller to test the sensor by completing the electrical circuits. The electromagnet includes a ferromagnetic core and a coil wound directly on the core. The roller has a ferromagnetic insert formed in a dumb-bell shape, that is, having a larger cross-section at its ends than in the middle to increase the attractive force of the electromagnet without significantly increasing weight and thus inertia of the roller. The chassis and the cover may be made of a ferromagnetic material to shield the sensor from external magnetic fields.

    摘要翻译： 一种用于感测车辆减速度的玫瑰传感器包括用于致动诸如气囊的两个乘员约束的两个单独的电路。 传感器具有安装在金属底盘上的模制塑料基座和焊接到底盘上以密封地包围底座的金属盖。 基座的一个表面用作辊的引导表面。 一对薄金属带缠绕在辊子上。 每个带的一端固定在底座上，另一端固定在基座下面的J形张紧器上。 辊子在施加的力下在引导表面上可滚动，以使带子接合点火触点以完成电路。 可以将光电磁体固定到底架上，而不增加传感器的总体尺寸。 电磁体可选择性地可操作以通过完成电路吸引辊来测试传感器。 电磁铁包括铁磁芯和直接缠绕在芯上的线圈。 辊具有形成为哑铃状的铁磁性插入件，即在其端部具有比中间更大的横截面以增加电磁体的吸引力，而不会显着增加重量并因此导致辊的惯性。 底盘和盖可以由铁磁材料制成，以将传感器屏蔽到外部磁场。