RFID label comprising an interface to external sensors
US9239981B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 13, 2010 |
| Grant date | Jan 19, 2016 |
| Priority date | — |
| Expiry date | Jul 11, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K7/0008
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A sensor-front-end processor (SFEP) predrives external sensors during a predominant part of time. In a low-consumption state it waits to receive a command (sc; st) to acquire and condition sensor signals. After receiving the command it drives the sensors, sets its own measuring range, acquires a coarse code (ccc, vcc) of a current and voltage sensor signal, conditions said signal and acquires a signal fine code (ccf, vcf). The command (sc) is generated in adjustable time intervals. The sensor-front-end processor acquires and conditions the signals from the sensors consecutively one after another. The command (st) is generated whenever a request (irq) to interrupt predriving one of the sensors was generated, i.e. whenever a level of the sensor signal or its relative change with respect to the previous measurement drops out from an interval for this sensor. The detected codes are stored in the memory.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.