System for remote powering and communication with a network of addressable, multichannel sensing modules
US6529127B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 11, 1998 |
| Grant date | Mar 4, 2003 |
| Priority date | — |
| Expiry date | Jul 11, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D3/022
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A multidrop network of multichannel, addressable sensing modules (ASM's), to be embedded within a composite structure, remotely powered, and interrogated by a personal computer through a non-contacting inductive link. Each ASM contains a microprocessor with non-volatile memory, multiplexer, programmable gain and filter instrumentation amplifier, and sigma delta analog to digital converter (all housed in two thin surface mount packages). An embedded mothernode includes circuitry for power and data reception (into the structure), and data transmission (back out of the structure). The external interrogation system communicates into the network of ASM's by modulating the AC waveform that delivers power to the embedded electronics. Once addressed, each ASM powers up its programmable (gain & filter) sensing channels (3 full differential or 5 pseudo differential) and data conversion elements. Sensed data are pulse code modulated, including error checking, which serially modulate an RF carrier for wireless transmission out of the composite to the interrogating computer. These advanced, micro-miniature sensing networks may be applied to a wide variety of military, medical, & civil structure…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.