Measuring and testing – Dynamometers – Responsive to torque
Patent
1987-04-17
1989-02-14
Ruehl, Charles A.
Measuring and testing
Dynamometers
Responsive to torque
73DIG2, G01L 310
Patent
active
048038857
ABSTRACT:
A torque measuring apparatus including a magnetic detection device for non-contact measuring strains in a rotating shaft of ferromagnetic material which is adapted to transmit torques, the detected strains being used to determine the levels of transmitted torques, the magnetic detection device including an exciting coil device wound around the outer periphery of the rotating shaft and adapted to magnetize the rotating shaft in its axial direction; a detecting core ring device in the form of an integral unit which includes a plurality of detecting cores arranged around the circumferential area of the rotating shaft to be magnetized equidistantly to form a ring, each of the detecting cores forming an independent magnetic circuit between the detecting core and the rotating shaft; and at least one magnetic detecting element for detecting a variable magnetic flux in each of the detecting cores depending on the level of the transmitted torque; whereby the strains in the rotating shaft can be non-contact measured based on the sum of detection signals from the magnetic sensors each of which is formed by each of the detecting cores and the corresponding magnetic detecting elements.
REFERENCES:
patent: 4406168 (1983-09-01), Meixner
patent: 4479390 (1984-10-01), Meixner
ASEA Journal 1960, vol. 33.3, pp. 23-32, The Ring Torductor-A Torque-Guage, without Slip Rings, for Industrial Measurement and Control.
Nishibe Yuji
Nonomura Yutaka
Takeuchi Masaharu
Tsukada Kouji
Kabushiki Kaisha Toyota Chuo Kenkyusho
Ruehl Charles A.
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