Movement detection sensor and movement detection device
US7061390B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Aug 22, 2003 |
| Grant date | Jun 13, 2006 |
| Priority date | — |
| Expiry date | Aug 22, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B13/1436
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A first movement detection sensor comprises a void formed by a partition wall made of a non-magnetic material, a magnetized rolling member which is sealed inside the void, and a magnetic sensor provided in the partition wall. A second movement detection sensor is configured by positioning the rolling member in the substantial center of the void and then filling the void with a visco-elastic body until the visco-elastic body abuts against the rolling member. A movement detection device is constructed by annexing an amplifying circuit, a transmitting circuit, a differentiating circuit, and so on to the first movement detection sensor and second movement detection sensor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.