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    • 4. 发明专利
    • Eddy current type pressure gage
    • EDDY电流型压力表
    • JPS58223029A
    • 1983-12-24
    • JP10738682
    • 1982-06-21
    • Res Inst Electric Magnetic AlloysShinkawa Denki Kk
    • MASUMOTO RIYOUSAWATANI SHIYOUHACHINAKAMURA NAOJIMATSUHASHI KANJIIMAIKE HIROSHIKONDOU YOSHIMITSU
    • G01L9/10
    • G01L9/10
    • PURPOSE:To make it possible to perform highly accurate measurement by a compact device in a broad temperature range, by detecting the amount of deflection of a diaphragm without contact by an eddy current type sensor, which is protected by ceramics, transducing the result into an electric signal, amplifying the signal, thereby obtaining an output signal. CONSTITUTION:The amount of deflection of a diaphragm 1, which receives pressure, is detected by an eddy current type sensor 2 without contact. The sensor 2 is protected by ceramics which are highly resistance against corrosion. The detected amount of deflection is transduced into an electric signal by a displacement detecting coil 3. The signal is amplified by an insulating type amplifier 4, and the output signal is obtained.
    • 目的:为了能够通过在宽温度范围内的紧凑型装置进行高精度的测量,通过用陶瓷保护的涡流型传感器检测膜片的偏转量而不接触,将结果转换成 电信号,放大信号,从而获得输出信号。 构成:接收压力的隔膜1的偏转量由涡电流式传感器2检测而不接触。 传感器2由耐腐蚀性高的陶瓷保护。 检测到的偏转量由位移检测线圈3转换成电信号。该信号由绝缘型放大器4放大,得到输出信号。
    • 5. 发明专利
    • EDDY CURRENT TYPE DISPLACEMENT GAGE
    • JPS57200803A
    • 1982-12-09
    • JP8663081
    • 1981-06-05
    • NIPPON STEEL CORPSHINKAWA DENKI KK
    • NAKAMORI YUKIOMATSUHASHI KANJINAKAMURA KIYOHISA
    • G01B7/00G01B7/02
    • PURPOSE:To measure the distance from the position separated from a body by crossing a magnetic flux detecting coil and a magnetic field generating coil and detecting the difference between outgoing magnetic flux density and feedback magnetic flux density. CONSTITUTION:The magnetic flux generating coil 1 and the magnetic flux detecting coil 2 are provided so that they cross each other. When the coil 1 is excited by a high frequency oscillator 3 and a constant current circuit 4, the feedback loop shown by a solid line is obtained when metal is not present in the loop of magnetic lines of force phi. Under this state, balance is maintained so that an induced voltage is not generated in the coil 2. When a metallic body is present at a point A in the magnetic loop, the eddy current is generated in the body, the feedback amount is reduced, the balance collapses, and the voltage is induced in the coil 2. Said voltage has a constant relationship with respect to the distance between the coil and the metallic body, and it is outputted through an amplifier 5, a rectifier 6, and a linearizing circuit 7. Therefore, the distance can be measured at the point separated from the body, and the application fields can be expanded to the great extent.