Patent · US Active

Wobble detection via software defined phase-lock loops

US9605995B2 · kind B2 · utility

0Cited by
4References
19Claims
0Family size

Assignee

Inventor

Key dates

Filing dateAug 28, 2014
Grant dateMar 28, 2017
Priority date—
Expiry dateApr 4, 2035

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG01P15/00
  • WIPO fieldMeasurement
  • WIPO sectorInstruments

Abstract

The embodiments relate to the use of one or more phase lock loops (PLL's) for detecting wobble of a surface upon which a computing device is set. The PLL's can be configured to lock onto an exponentially-damped sinusoid output from an accelerometer in order to differentiate between surface-induced movement and direct human-induced movement of the computing device. Reduced latency in wobble detection can be achieved by implementing the PLL in software and using multiple PLL's per accelerometer axis. Further reduction in the latency of wobble detection can be achieved by seeding the phase of an oscillator signal generated by each PLL in order to improve phase estimates when attempting to lock a PLL onto the accelerometer output.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.