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    • 78. 发明专利
    • Measurement apparatus for dynamic stress
    • 动态应力测量装置
    • JP2003050163A
    • 2003-02-21
    • JP2001239096
    • 2001-08-07
    • Chuden Gijutsu Consultant KkMitsubishi Heavy Ind LtdMitsubishi Juko Koji Kk三菱重工工事株式会社三菱重工業株式会社中電技術コンサルタント株式会社
    • YASUFUKU SEIICHIMURAI RYOSUKEYANAGISAWA EIICHIOKA SHUNZOKATSUNO TOSHIOIKEDA MAKOTOMATSUOKA TAKASHI
    • G01L1/00G01N27/72
    • PROBLEM TO BE SOLVED: To provide a measurement apparatus for dynamic stress, capable of accurately measuring a dynamic stress up to about 10 and several Hz, even in the measurement of the stress in a steel structure, such as piers or bridges of highways. SOLUTION: The measurement apparatus for dynamic stress comprises a probe 30, having an excitation coil 32 in which an excitation signal is applied and a detecting coil 3 for outputting a detection signal, in response to stress of a material to be measured and is disposed at predetermined intervals in the material, a synchronous rectifier 40 for rectifying the detection signal synchronously with the excitation signal, and a filter circuit 52 for attenuating an excitation signal component from the output signal of the rectifier. The apparatus calculates the stresses generated at the material from an amplitude of an output waveform of the filter circuit and from the intrinsic coefficient at the material. In this apparatus, the filter circuit 52 has characteristics for attenuating a frequency component of the excitation signal and for not distorting the waveform of the stress frequency components of the material.
    • 要解决的问题:即使在诸如高速公路的桥墩或钢结构的钢结构中的应力测量中,也能够提供动态应力的测量装置,能够精确地测量高达约10Hz和几Hz的动态应力。 解决方案:用于动态应力的测量装置包括探针30,其具有施加激励信号的激励线圈32和响应于待测量材料的应力而输出检测信号的检测线圈3, 材料中的预定间隔,用于与激励信号同步整流检测信号的同步整流器40,以及用于从整流器的输出信号衰减激励信号分量的滤波器电路52。 该装置根据滤波电路的输出波形的振幅和材料的固有系数,计算材料产生的应力。 在该装置中,滤波器电路52具有用于衰减激励信号的频率分量并且不使材料的应力频率分量的波形变形的特性。
    • 79. 发明专利
    • Method and instrument for measuring stress
    • 测量应力的方法和仪器
    • JP2003028734A
    • 2003-01-29
    • JP2001209800
    • 2001-07-10
    • Chuden Gijutsu Consultant KkMitsubishi Heavy Ind LtdMitsubishi Juko Koji Kk三菱重工工事株式会社三菱重工業株式会社中電技術コンサルタント株式会社
    • YASUFUKU SEIICHIIKEDA MAKOTOMATSUOKA TAKASHIMURAI RYOSUKEOKA SHUNZOKATSUNO TOSHIO
    • G01L1/12G01L1/00
    • PROBLEM TO BE SOLVED: To reduce a measuring error in a magnetostrictive sensor to accurately measure a stress.
      SOLUTION: In this stress measuring method for measuring the stress acting on a steel material 1 using the magnetostrictive sensor 2 for which structure integrated with a core of an excitation coil and a core of a detection coil is adopted, the magnetostrictive sensor 2 is brought close to the steel material 1, the excitation coil is electrified to excite the steel material 1, an excitation voltage generated in the excitation coil by the electrification, and an output voltage induced in the detection coil by the excitation are detected, an impedance is calculated based on an excitation current in the electrification for exciting the steel material 1 in the magnetostrictive sensor 2, and based on the voltage generated in the excitation coil, stress sensitivity corresponding to the calculated impedance is estimated referring to a relationship between a preliminarily found impedance about the steel material 1 and the stress sensitivity, and a level of the stress acting on the steel material 1 is calculated, based on the estimated stress sensitivity and the output voltage.
      COPYRIGHT: (C)2003,JPO
    • 要解决的问题:减少磁致伸缩传感器中的测量误差,以精确测量应力。 解决方案:采用使用与励磁线圈的芯和检测线圈的芯结合的结构的磁致伸缩传感器2来测量作用在钢材1上的应力的应力测量方法中,使磁致伸缩传感器2接近 对于钢材1,励磁线圈通电以激励钢材1,激励线圈中产生的激励电压通过励磁,并且检测线圈中感应的输出电压由激励被检测,阻抗基于 对于在磁致伸缩传感器2中激励钢材1的通电中的励磁电流,并且基于在励磁线圈中产生的电压,根据预测的阻抗约为 钢材1和应力敏感性,以及作用在钢材上的应力水平 根据估计的应力灵敏度和输出电压计算l 1。