知搜-全球专利检索

  1. 登录
  2. 注册

搜索结果

60 条记录 (耗时 0.029 秒)

    REAL-TIME STRUCTURAL MEASUREMENT (RTSM) FOR CONTROL DEVICES
    10.
    发明申请
    REAL-TIME STRUCTURAL MEASUREMENT (RTSM) FOR CONTROL DEVICES 有权

    公开(公告)号：US20150247754A1

    公开(公告)日：2015-09-03

    申请号：US14429955

    申请日：2013-09-11

    申请人： PONTIFICIA UNIVERSIDAD CATOLICA DE CHILE

    发明人： René Zemp ,  Juan Carlos De La Llera

    IPC分类号： G01H1/00

    CPC分类号： G01H1/003 ,  G01B5/30 ,  G01B7/16 ,  G01B11/16 ,  G01H1/00

    摘要： The present invention shows a solution to measure the relative displacements related to a structure in order to use the signal measured as feedback signal in real time for the structural monitor of the active and semi-active vibration. Said monitors reduce the structural movement caused by any source of natural or artificial vibration. The conventional measurement methods of the relative displacement are often not able to accurately measure the displacement in real time. The delay in the signal measured often has a negative effect on the feedback monitor device.The invention consists in a pre-stressed axial element (1), installed between two different points of the structure (2) using a fixed connector (5) and a flexible one (6). As the structure (2) vibrates in response to an external “source”, a relative displacement is caused between two connecting points of the axial element, which can be measured based on the rotation φ of the flexible connector (5) of the axial element. In addition, at intermediate points of the axial element (1), the relative displacement between the structure (2) and the axial element (1) can be measured through sensors (3). With these measurements, the form of discrete displacement can be obtained in real time of the whole structure where the axial element (1) is installed.In the event an axial element (4) is installed, where an upper mode passes through point zero, the modal displacement of this upper mode will not be measured. Assuming that the full displacement of the structure is associated with the first two modes, which is often a god approach in practice to earthquake-induced displacements, the modal displacement of these two modes can be measured independently in real time. A modal monitor through active or semi-active devices can improve the structural behavior in some cases.In order to keep the disturbance level of the signal measured introduced by natural vibrations of the axial element (1) as low as possible, it is important that the fundamental frequencies of the axial elements (1) are significantly higher than the natural frequencies of the structure (2). For this goal to be achieved, using materials of the axial element is necessary, which have little density and can be highly pre-stressed, such as carbon fiber.