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    • 8. 发明授权
    • Position detecting apparatus using a magnetic sensor and a closed
magnetic circuit with non-uniform magnetic flux distribution
    • 位置检测装置使用磁传感器和具有不均匀磁通分布的封闭磁路
    • US4810965A
    • 1989-03-07
    • US906027
    • 1986-09-11
    • Yoshiro FujiwaraMichiko EndoYuji KojimaNoboru WakatsukiAkira HiranoKazunari Komenou
    • Yoshiro FujiwaraMichiko EndoYuji KojimaNoboru WakatsukiAkira HiranoKazunari Komenou
    • G01D5/20G01B7/14G01R33/04H01L43/08
    • G01D5/20
    • A position detector having a magnetic sensor for measuring linear or angular displacement, or detecting a position of a body without contact thereto. The detector has a closed circuit including magnets and yokes. The magnetic leakage flux which emanates from the inside surfaces of the yokes is utilized to detect the position of the body. The magnetic sensor is transferred along the inside surfaces of the yokes by a transferring circuit, which senses the magnetic field intensity of the leakage flux distributed thereon. This enables the detector to have a longer measuring range than that of a prior art detectors. An output signal is stable due to the shielding effect of the yokes. The magnetic closed circuit has many magnetic and mechanical configurations. For example, for the magnet, a permanent magnet and an electromagnet can be used. Further, improvements are proposed for enhancing the linearity of the output signal voltage with respect to the transferring distance of the sensing element and for compensating the offset drift of an amplifier or changing the coercive force of permanent magnets.
    • 一种位置检测器,具有用于测量线性或角位移的磁传感器,或者检测身体的位置而不与其接触。 检测器具有包括磁体和轭的封闭电路。 利用从轭的内表面发出的漏磁通来检测身体的位置。 磁传感器通过传递电路沿着轭的内表面传递,传输电路感测分布在其上的漏磁通的磁场强度。 这使得检测器具有比现有技术的检测器更长的测量范围。 输出信号由于磁轭的屏蔽效应而稳定。 磁闭环具有许多磁力和机械结构。 例如,对于磁体,可以使用永磁体和电磁体。 此外,提出了相对于感测元件的传送距离来增强输出信号电压的线性度并且用于补偿放大器的偏移漂移或改变永磁体的矫顽力的改进。
    • 10. 发明授权
    • Piezoelectric transformer producing an output A.C. voltage with reduced
distortion
    • 压电变压器产生输出交流电压,具有减小的失真
    • US5371430A
    • 1994-12-06
    • US57500
    • 1993-05-06
    • Masuji SatoNoboru WakatsukiMasanori UedaHiroshi Hasegawa
    • Masuji SatoNoboru WakatsukiMasanori UedaHiroshi Hasegawa
    • H01L41/107H01L41/08
    • H01L41/107
    • A piezoelectric transformer comprises a piezoelectric substrate carrying thereon an input electrode structure provided on an upper major surface of the piezoelectric substrate for receiving an a.c. voltage for causing an excitation of an elastic wave in the substrate such that the elastic wave propagates through the substrate in a longitudinal direction, an output electrode structure provided on a lower major surface of the piezoelectric substrate for producing an output a.c. voltage by converting the elastic wave into an electric voltage, wherein the input electrode structure and the output electrode structure have a periodical structure in the longitudinal direction with a pitch corresponding to a wavelength of the elastic wave, and wherein at least one of the first and second electrode structures extend in the longitudinal direction from the first longitudinal edge to the second longitudinal edge substantially continuously.
    • 一种压电变压器包括一个压电基板,其上带有一个输入电极结构,该输入电极结构设置在压电基板的上主表面上,用于接收一个直流电压。 使弹性波沿着纵向传播通过基板的输出电压结构的输出电极结构的输出电压结构的输出电极结构。 通过将弹性波转换成电压,其中,所述输入电极结构和所述输出电极结构在纵向方向上具有对应于所述弹性波的波长的间距的周期性结构,并且其中,所述第一和 第二电极结构基本上连续地从第一纵向边缘延伸到第二纵向边缘。