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    • 2. 发明专利
    • 位置検出装置
    • 位置检测器
    • JP2015072202A
    • 2015-04-16
    • JP2013208132
    • 2013-10-03
    • 株式会社マコメ研究所
    • 新井 栄作澤 正章加藤 博之
    • G01D5/12G08G1/00G01B7/00
    • 【課題】磁気センサの検出信号が大きく変動しても、安定した位置検出性能を実現する位置検出装置を提供する。 【解決手段】本実施形態の位置検出装置201は、ゴム磁石テープ107の存在と座標を検出するための磁気センサアレイ105から得られる信号に、ゴム磁石テープ107の中心座標を決定するための閾値を、磁気センサアレイ105から得られる信号の強度に応じて可変にした。閾値は、磁気センサアレイ105から得られる信号の座標位置が、ゴム磁石テープ107の幅に略一致するように設定される。 【選択図】図3
    • 要解决的问题:即使当磁传感器的检测信号显着变化时,也能够提供能够实现稳定的位置检测性能的位置检测器。解决方案:实施例的位置检测器201被配置为使得用于决定中心坐标的阈值 可以根据从磁传感器阵列105获得的信号的强度来改变橡胶磁带107,从磁传感器阵列105获得的信号检测橡胶磁带107的存在和坐标。阈值被设置为 从磁传感器阵列105获得的信号的坐标位置基本上匹配橡胶磁带107的宽度。
    • 3. 发明专利
    • Inductance variation detecting circuit, displacement detector and metal detection device
    • 电感变化检测电路,位移检测器和金属检测装置
    • JP2012021970A
    • 2012-02-02
    • JP2011085113
    • 2011-04-07
    • Makome Kenkyusho:Kk株式会社マコメ研究所
    • ARAI EISAKU
    • G01R27/26G01B7/00
    • PROBLEM TO BE SOLVED: To provide an inductance variation detecting circuit that effectively detects variation of inductance with a single coil and realizes a compact and yet high-precision displacement sensor, and to provide a displacement detector and a metal detection device that use the same.SOLUTION: A prescribed voltage and ground are alternately connected to a transient response circuit in which a coil and a capacitor are serially connected. Two free-wheel diodes are disposed to allow electromotive force generated from the coil immediately after being disconnected from the voltage or the ground, storing an electric charge in the capacitor and stabilizing the circuit. Then a voltage between both ends of a load which is composed of a capacitor or of a serial connection between a capacitor and a coil is obtained, and a change in inductance between when the coil is nearby a non-magnetic material and when it is not is detected.
    • 要解决的问题:提供一种电感变化检测电路,其可以用单个线圈有效地检测电感的变化,并实现紧凑且高精度的位移传感器,并提供使用位移检测器和金属检测装置,其使用 一样。

      解决方案:规定的电压和接地交替连接到线圈和电容器串联连接的瞬态响应电路。 设置两个续流二极管,以便在断开电压或接地之后立即从线圈产生的电动势,将电荷存储在电容器中并使电路稳定。 然后,获得由电容器或电容器和线圈之间的串联连接构成的负载的两端之间的电压,以及当线圈在非磁性材料附近时的电感变化以及不是 被检测到。 版权所有(C)2012,JPO&INPIT

    • 9. 发明专利
    • Proximity sensor
    • 接近传感器
    • JP2012185033A
    • 2012-09-27
    • JP2011048174
    • 2011-03-04
    • Makome Kenkyusho:Kk株式会社マコメ研究所
    • ARAI EISAKU
    • G01B7/00G01D5/20G01V3/10
    • PROBLEM TO BE SOLVED: To provide a proximity sensor capable of reducing an eddy current loss and obtaining necessary and sufficient position detection sensitivity even if detection coils are covered by an outer shell made of metal.SOLUTION: A proximity sensor having an excellent S/N ratio and high sensitivity can be realized, after rectangular wave voltages are applied to two coils, not by independently detecting an electric current flowing in each of the coils and then calculating differences at a differential circuit or the like, but rather by directly detecting values of differences between electric currents. The respective coils have the same magnetic characteristics and electric characteristics, thereby changing in the same way even if these characteristics are changed by temperature change. Therefore, variation caused by the temperature change hardly occurs.
    • 要解决的问题:即使检测线圈被由金属制成的外壳覆盖,提供能够减小涡流损耗并获得必要且足够的位置检测灵敏度的接近传感器。 解决方案:在将矩形波电压施加到两个线圈之后,可以实现具有优异的S / N比和高灵敏度的接近传感器,而不是通过独立地检测在每个线圈中流动的电流,然后计算 差分电路等,而是通过直接检测电流之间的差异值。 各线圈具有相同的磁特性和电特性,从而即使这些特性由温度变化而改变也是相同的。 因此,几乎不发生由温度变化引起的变化。 版权所有(C)2012,JPO&INPIT
    • 10. 发明专利
    • Magnetic sensor
    • 磁传感器
    • JP2012063205A
    • 2012-03-29
    • JP2010206707
    • 2010-09-15
    • Makome Kenkyusho:Kk株式会社マコメ研究所
    • ARAI EISAKU
    • G01R33/02
    • PROBLEM TO BE SOLVED: To provide a compact and highly precise magnetic sensor capable of effectively suppressing DC offset by a single coil.SOLUTION: A rectangular wave is supplied to a circuit where a coil 104 accompanied by a yoke 201 and a capacitor C305 are connected in series. A saturation phenomenon is generated in the yoke 201 within the cycle of the rectangular wave, and its current changes are detected through a current voltage conversion circuit, and then integrated. Current based on this integrated output signal is generated by a voltage current conversion circuit to be fed back to the coil 104. The feedback current is proportional to an outside magnetic field, and hence a highly linear magnetic sensor is provided. Different from the conventional technology, bidirectional current is supplied to the coil 104. Therefore, even when a circuit constant changes, the detected voltage changes become similar by the difference in the current direction to cancel each other. Accordingly, the offset hardly occurs during a period when no magnetic field is present. Thus, unlike the conventional technology, there is no need to install two coils, and the number of components is reduced, achieving a low-cost and highly precise magnetic sensor.
    • 要解决的问题:提供能够有效地抑制单个线圈的直流偏移的紧凑且高精度的磁传感器。 解决方案:将矩形波提供给串联有磁轭201和电容器C305的线圈104的电路。 在矩形波的周期内的轭201中产生饱和现象,通过电流电压转换电路来检测其电流变化,然后进行积分。 基于该积分输出信号的电流由电压电流转换电路产生,以反馈到线圈104.反馈电流与外部磁场成比例,因此提供高度线性的磁传感器。 与传统技术不同,双向电流被提供给线圈104.因此,即使当电路常数改变时,检测到的电压变化也随着电流方向的差异而相互抵消。 因此,在没有磁场存在的期间,几乎不发生偏移。 因此,与传统技术不同,不需要安装两个线圈,并且部件的数量减少,实现了低成本和高精度的磁传感器。 版权所有(C)2012,JPO&INPIT