Real-time wireless dynamic tire pressure sensor and energy harvesting system
US9315078B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 19, 2013 |
| Grant date | Apr 19, 2016 |
| Priority date | — |
| Expiry date | Nov 19, 2033 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60R2021/01308
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An instantaneous/real-time wireless dynamic tire pressure sensor (DTPS) for characterizing pavement qualities and for detecting surface and subsurface pavement defects under normal driving conditions. Signal processing provides quantitative assessment of surface conditions. DTPS includes a vehicle tire valve stem-mounted pressure sensor and wheel hub-mounted signal conditioning, amplification, and transmitting circuitry. A signal processing computer within the vehicle is wirelessly coupled to the hub-mounted circuitry. Tire pressure changes caused by ground vibration excitation from the interaction between the tire and pavement at normal driving speeds are detected. When acoustic radiation from a surface wave is significantly stronger than acoustic noise, subsurface information can be extracted. An energy harvester based on strong magnetostatic coupling between a high permeability core solenoid, fixed proximate a vehicle wheel, and a bias magnet array, fixedly mounted in conjunction with a dust shield, can provide power the DIPS.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.