Shape detector

Abstract

Abstract PURPOSE:To measure precisely the stress of a rolled steel plate by collecting together legs of one ends of respective four U-shaped iron coress to wind a common primary coil, by arranging the other legs in the rolling direction and in the width directon to wind a secondary coil and by operating the output thereof. CONSTITUTION:By collecting together legs of one ends of respective four U-shaped iron cores 70-76, a common primary coil 78 is wound, and the other legs are arranged in a shape of a cross in the width direction and in the rolling direction of a stell plate. The output in the width direction is detected by coils 82, 86 while that in the rolling direction by coils 80, 84. When tension is applied in the rolling direction, permeability increase, magnetic flux in the rolling direction increases than that in the width direction, and among output voltages of the respective coils, a difference is produced. When the induced voltages in the rolling and width directions are made to be ER, ET, the difference ES=ER-E Tbecomes a function of stress, and the sum Eg=ER+ET a function of a gap lg. A gap signal is obtained from the output of an adder 98 and an excitatin current signal obtained from a resistance 98 in a subtracting device 102 by adding and rectifying the outputs from the coils 80, 84 and 82, 86 in rectifiers 88, 90, and by taking the result as a stress signal. Thereby, by calculating both signals, stress of the steel plate is obtained precisely.

Inventors

• 👤 Kazuhiro Hirohata
• 👤 Shuichi Hirasaki
• 👤 Yutaka Wakamatsu
• 👤 Tadashi Kanetani

Bibliographic Details