Obtaining information from time variation of sensing results
US7817254B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 30, 2008 |
| Grant date | Oct 19, 2010 |
| Priority date | — |
| Expiry date | Jan 30, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2021/0346
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Sensing results from moving objects, e.g. from photosensing emanating light or from impedance-based sensing, can indicate sensed time-varying waveforms with information about objects. For example, a sensed time-varying waveform can be compared with another waveform, such as a reference waveform produced by objects of a certain type, to obtain comparison results indicating motion-independent information about the object; time-scaling can adjust for displacement rate such as speed. Also, a modulation periodicity value can be obtained from a sensed time-varying waveform and used in obtaining information about an object; for example, a periodic modulation frequency can be used with a given time's chirp frequency to obtain phase information about an object's position. Or, where periodic modulation frequency indicates displacement rate, time scaling during comparison can use a scaling factor based on the frequency. Objects can move fluidically as in flow cytometry or through scanning movement, as in document scanning.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.