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    • 2. 发明申请
    • Magnetic-Field Measurement Device
    • 磁场测量装置
    • US20130121879A1
    • 2013-05-16
    • US13810832
    • 2011-07-19
    • Ryuzo KawabataTakako MizoguchiAkira TsukamotoAkihiko KandoriTomoko Yoshimura
    • Ryuzo KawabataTakako MizoguchiAkira TsukamotoAkihiko KandoriTomoko Yoshimura
    • G01N33/543
    • G01N33/54333G01N27/745
    • The disclosed magnetic immunoassay device, which performs magnetic immunoassays using antigen-antibody reactions, can perform speedy immunoassays without bound/free separation in the test samples. The device is also practical, being capable of stable magnetism measurement without magnetic shielding. The disclosed magnetic immunoassay device is provided with: an excitation coil that uses an AC magnetic field to magnetize a test sample containing a magnetic marker; a magnetism sensor that measures magnetism in the test sample and outputs a magnetism signal; and a displacement sensor for detecting changes in the distance between the test sample and the magnetism sensor. By optimally setting the bandwidth of a lock-in amplifier, which detects changes in the phase of the magnetism signal outputted by the magnetism sensor, and the rotational speed produced by a drive system, which moves the test sample at low speeds, the impact of environment magnetic noise is reduced, and correcting the magnetism signal using distance information obtained from the displacement sensor allows stable magnetism measurement.
    • 所公开的使用抗原 - 抗体反应进行磁性免疫测定的磁性免疫测定装置可以在测试样品中进行快速的免疫测定而无限制/自由分离。 该装置也是实用的,能够在没有磁屏蔽的情况下进行稳定的磁测量。 所公开的磁免疫测定装置具有:励磁线圈,其使用交流磁场来磁化含有磁性标记的测试样品; 磁传感器,其测量测试样品中的磁性并输出磁信号; 以及用于检测测试样本和磁传感器之间的距离变化的位移传感器。 通过最佳地设置检测由磁传感器输出的磁信号的相位变化的锁定放大器的带宽和由低速移动测试样本的驱动系统产生的转速, 环境磁噪声降低,并且使用从位移传感器获得的距离信息来校正磁信号,可以进行稳定的磁测量。