微弯光纤应力计
    11.
    发明公开

    公开(公告)号:CN87107210A

    公开(公告)日:1988-08-03

    申请号:CN87107210

    申请日:1987-10-29

    CPC classification number: G01L1/245 G01B11/18

    Abstract: 一种微弯应力计,包含两块具有相对的、互相错开的波纹表面的板,和一根夹在两块板之间的信号光纤。光纤上覆有涂层,由光纤的一端送入光信号,在其另一端用光传感器读出光信号。对光的调制主要来源于由板给光纤施加的压力差。第二根光纤,参考光纤,在信号光纤附近被暴露在相同的热条件下;用参考光纤的光信号与传过信号光纤的光信号比较,可以抵消温度变化所导致的光信号的温度误差。铝、聚酰亚胺或金涂层提高了光纤的耐温能力。

    一种用于监测钢绞线预应力损失的装置

    公开(公告)号:CN106969862A

    公开(公告)日:2017-07-21

    申请号:CN201611094471.9

    申请日:2016-12-02

    CPC classification number: G01L1/245

    Abstract: 本发明涉及一种用于监测钢绞线预应力损失的装置,包括光纤传感器、温度补偿传感器、波纹管、引线保护套管、传感器引线、传感器保护垫片以及光线光栅解调仪;将所述光纤传感器沿所述波纹管内的钢绞线长度方向布设于所述钢绞线反弯点处,所述光纤传感器与所述温度补偿传感器均通过所述传感器引线与所述光线光栅解调仪相连,所述光线光栅解调仪用以实时获取传感器采集到的波长信息,进而得到钢绞线实时的预应力变化情况。本发明能够解决现有大型建筑预应力构件施工过程中对预应力损失缺乏直接监测方法的问题,施工方便,操作简单,具有良好的工程适用性。

    一种带空气间隙的光纤弯曲传感器及弯曲测量方法

    公开(公告)号:CN106017343A

    公开(公告)日:2016-10-12

    申请号:CN201610395797.9

    申请日:2016-06-06

    CPC classification number: G01B11/16 G01L1/245

    Abstract: 本发明公开了一种带空气间隙的光纤弯曲传感器及弯曲测量方法,采用单模阶跃光纤,包括纤芯和包层,在光纤的上部开设一个一定宽度和深度的间隙,构成带空气间隙的光纤弯曲传感器,将带空气间隙的光纤弯曲传感器粘贴在测量结构上,开口端向外侧,当光纤跟随测量结构发生弯曲时,随着弯曲角度的变化,通过这个空气间隙的光强也发生变化,通过测量通过空气间隙的光强衰减得到测量结构的弯曲半径。本发明可以直接测量光强,不需要昂贵的光谱分析仪等设备,同时提高了测量灵敏度。

    A METHOD AND DEVICE FOR CONTINUOUS MONITORING OF DYNAMIC LOADS
    19.
    发明申请
    A METHOD AND DEVICE FOR CONTINUOUS MONITORING OF DYNAMIC LOADS 审中-公开
    用于连续监测动态负载的方法和装置

    公开(公告)号:WO1996018866A1

    公开(公告)日:1996-06-20

    申请号:PCT/NO1995000234

    申请日:1995-12-15

    Inventor: SAFETY-ONE A/S

    Abstract: For continuous monitoring of dynamic loads, including stresses and strains in large hull structures for vessels (5), a strain measurement system (2) is employed with fibre optic cables which connect optical strain sensors (7; 16) at different points in the hull structure. Optical signals for detection of stresses and strains are distributed to the strain sensors (7; 16) from an optical transmitter (11). The strain measurement system (2) is connected via a central monitoring unit (10) to a computer-implemented control system (1) which in turn is connected to a display and data presentation unit (4) and possibly other measurement systems (3). In a first operating mode in this method strain values during loading and unloading of the vessel (5) are detected by means of the strain sensors (7; 16). By means of the control system (1) a curve is generated which shows an average strain, and an alarm signal if the average strain exceeds a predetermined threshold which indicates an unacceptable level of strain. In a second operating mode when the vessel (5) is underway, strains are continuously detected by means of the strain sensors (7; 16). An alarm signal is generated if the average strain exceeds a predetermined threshold which indicates an unacceptable level of strain. A strain measurement system and a fibre optic strain sensor (16) for use with this method are also described.

    Abstract translation: 对于动态载荷的连续监测,包括船体大型船体结构中的应力和应变(5),使用应变测量系统(2),光缆在光缆的不同点连接光学应变传感器(7; 16) 结构体。 用于检测应力和应变的光信号从光发射器(11)分配到应变传感器(7; 16)。 应变测量系统(2)经由中央监控单元(10)连接到计算机实现的控制系统(1),该控制系统又连接到显示器和数据呈现单元(4)以及可能的其他测量系统(3) 。 在该方法的第一操作模式中,通过应变传感器(7; 16)检测容器(5)的装载和卸载期间的应变值。 通过控制系统(1),产生显示平均应变的曲线,如果平均应变超过表示不可接受的应变水平的预定阈值,则产生报警信号。 在容器(5)正在进行的第二操作模式中,通过应变传感器(7; 16)连续地检测应变。 如果平均应变超过指示不可接受的应变水平的预定阈值,则产生报警信号。 还描述了与该方法一起使用的应变测量系统和光纤应变传感器(16)。

    DISCRETE STRAIN SENSOR
    20.
    发明申请
    DISCRETE STRAIN SENSOR 审中-公开
    离散应变传感器

    公开(公告)号:WO1989001614A1

    公开(公告)日:1989-02-23

    申请号:PCT/US1988002040

    申请日:1988-06-14

    CPC classification number: G01L1/243 G01L1/245

    Abstract: A fiber optic load sensor (12) and method of forming the same are disclosed for sensing the load applied to a structural surface (18). The sensor (12) comprises a length of fiber optic material (14) disposed adjacent to the surface (18). The fiber optic material is connectable to a light source (22) and to a light detector (26). The fiber optic material (14) includes at least one curved portion deformable in response to the applied load. The curved portion is dimensioned such that the light passing through the fiber optic material (14) is attenuated in linear relation to the deformation of the curved portion in response to the load applied to the surface.

    Abstract translation: 公开了一种光纤负载传感器(12)及其形成方法,用于感测施加到结构表面(18)上的负载。 传感器(12)包括与表面(18)相邻设置的一定长度的光纤材料(14)。 光纤材料可连接到光源(22)和光检测器(26)。 光纤材料(14)包括响应于所施加的负载而变形的至少一个弯曲部分。 弯曲部分的尺寸使得穿过光纤材料(14)的光响应于施加到表面的负载而与弯曲部分的变形成线性关系。

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