Weight-measuring sensor
US7148432B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 12, 2004 |
| Grant date | Dec 12, 2006 |
| Priority date | — |
| Expiry date | Mar 12, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L1/125
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.