Method and apparatus for effiviently phase modulating a subcarrier signal for an inductively coupled transponder
US5824891A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 25, 1997 |
| Grant date | Oct 20, 1998 |
| Priority date | — |
| Expiry date | Mar 25, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60C23/0442
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A method and apparatus for remotely measuring the pressure and temperature of gas in a vehicle wheel. The vehicle includes a frame member and a vehicle wheel mounted for rotation relative to the frame member about a rotation axis. A transmitting circuit is mounted on the frame member. The transmitting circuit includes a transmitting coil and generates electrical energy in the transmitting coil. A receiving circuit is mounted on the vehicle wheel for movement therewith such that, as the vehicle wheel rotates relative to the frame member, the receiving circuit is inductively coupled to the transmitting circuit. The receiving circuit includes a sensor for generating a data signal corresponding to a physical characteristic of the vehicle wheel and a wireless communication circuit for receiving the electrical energy from the transmitting coil to remotely power the receiving circuit and for transferring the data signal from the receiving circuit to the transmitting circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.