Methods and apparatus to detect carrying of a portable audience measurement device
US8040237B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 29, 2008 |
| Grant date | Oct 18, 2011 |
| Priority date | — |
| Expiry date | Oct 16, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04H60/40
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Methods and apparatus to detect carrying of a portable audience measurement device are disclosed herein. An example portable audience measurement device includes a housing; a media detector in the housing to collect media exposure data; a first status sensor to detect a first distance between the housing and an object at a first time, wherein the first status sensor is to detect a second distance between the housing and the object at a second time; and a distance comparator to generate a first signal indicative of a relationship between the first distance and the second distance to enable determination of whether the device is being carried by a person.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.