| 摘要 |
A weight sensor 10 having a simple structure and yet being capable of detecting load or pressure of an object to be measured in a short time and with high sensitivity and high precision. The sensor includes a first rotating shaft 14 vertically and rotatably supported on a stage 12 , a second rotating shaft 18 axially and coaxially connected to the first rotating shaft 14 with a magnetostrictive member 16 interposed therebetween for rotatably supporting an object 20 to be measured, and a pickup coil 28 for detecting changes in magnetic permeability or remnant magnetization of the magnetostrictive member 16 . Load or pressure of the object 20 is detected as the changes in magnetic permeability or remnant magnetization, which are caused by extension and contraction of the magnetostrictive member 16.
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