Internal state detector and vehicle
US12146855B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jul 15, 2021 |
| Grant date | Nov 19, 2024 |
| Priority date | — |
| Expiry date | Mar 11, 2043 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2291/103
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A detector that detects an internal state of a plate-shaped object including a fiber-reinforced resin. The detector includes an exciter that applies, to a surface of the object, ultrasonic vibrations of Lamb waves, in a selected frequency range where only a zero-order fundamental wave symmetric mode and a zero-order fundamental wave asymmetric mode of the Lamb waves appear, a vibration detector that detects the applied ultrasonic vibrations propagating in the object, and an internal state estimation calculator that estimates the internal state of the object, by obtaining a propagation time of the ultrasonic vibrations propagating in the object corresponding to each frequency of the Lamb waves, based on the detection result of the vibration detector, estimating the internal state based on a delay time of the propagation time relative to a reference propagation time of the object for each frequency in the selected frequency range, and outputting the estimated internal state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.