Sensor module integrating both the measurement of a rod travel and measurement of the force exerted on said rod
US6871916B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 6, 2001 |
| Grant date | Mar 29, 2005 |
| Priority date | — |
| Expiry date | Dec 16, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60G2400/60
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A sensor module including a processing unit, a stroke sensor and a force sensor (3) for obtaining data relating to both a force exerted on an axially-moving rod (1) and the travel of the rod through a determination of the position of the piston (2) with respect to the rod (1). The sensor module is characterized by a first stationary electrical coil (5) that is arranged about the piston (2) and the rod (1) and a second moving electrical coil (6) that is disposed about the rod (1) and connected to the force sensor (3). The first (5) and second (6) coils are coaxial and as a result induced oscillatory voltage within the stationary coil (5) generates an eddy current within the piston (2) that permit a measurement of the stroke of the piston (2) by means of eddy-current signal received by the stroke sensor using the piston (2) as a test body, and supplying the force sensor with electrical power through the second moving electrical coil (6). The first stationary electrical coil (5) is further used as a medium for the transmission of an electrical measurement signal (S) that is generated by the force sensor (3).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.