Printed RFID and Wireless Sensor Solutions, Hans-Erik Nilsson, Mid Sweden University
Printed RFID and WirelessSensor Solutions, PWiSE Nordite project
Our objectives• Development of new tools for system integration of printed wireless sensor solutions – Basic research targeting printing of active or semi-active devices that allow integration of printed logics, sensor and wireless communication• Printed RFID sensor solutions – We are targeting RFID sensor functionality at similar price levels as EPC type RFID tags (5 to 10 US cent). The main motivation for the printed part is to reach large area sensor functionality and low cost customization, and to allow disposable wireless sensor solutions.• Sweep-over type or EAS wireless sensor solutions – We are targeting integration of printed sensor functionalities into fully printed RF structures. The readout solutions targeted are sweep over readers (VTT) and resonator circuits typically used in Electronic Article Surveillance systems (EAS).
Vision Printed large Printed large area sensor area sensor Printed logic Printed logic Printed Printed modulator modulator Printed or foil Silicon IC antenna RFID inlayChip-less sensor label Hybrid sensor label
Roadmap and research layers in the projectMIUN, VTTMIUN, VTT,KTHVTT, MIUN, ‘Optional’KTHVTT, KTH Both chip-less and chip-assisted printed wireless sensor demonstrations
Single event logging using passive circuits• Passive wireless sensor solutions need sensors with memory functions to bridge the gap of time Gap of time Time Event Wireless detected tag near by sensor reader Relevant for both mesh-type and area type solutions
Integration of printed gas sensors with existing RFID inlays• Combining nanoparticle based PriMeBits gas sensors with standard inlays (aluminum) would drastically simplify manufacturing of sensor labels• Utilizing electromagnetic coupling between printed WORM structures and aluminum inlays is one possible solution Manuscript ready and submitted for publication …
Measurements with moisture sensor integrated using EM coupled loopsMeasured minimum required transmit power between sensor tag and referencetag when located inside a laboratory wall with 80% humidity and with the RFIDreader positioned perpendicular 0.8 m from the labels. Two layer printed loopwith moisture sensitive WORM was plastered over the antenna loop. The WORMsensor was pre-sintered to about 10 kW.
Nanoparticle array sensor EAS tag activated when moisture threshold reached Printed moisture sensor with memory function Combining roll to roll and ink-jet techniques
Near field fully printed sensor label• Near field solutions are needed – Our concept are based on sweep-over reader in an electrically active barcode technology • The barcode provides the ID • Sensor data can be directly linked to single bars (bits) in the barcode Reader solution developed by – Concepts using single event VTT for third party logging and WORMs can be used
Spoilage sensorInkjet printed nanoparticle based electronic bar code forH2S sensing. High sensitivity reached using a low sinteringdegree (porous array cleaned by toluene)
Smart packaging demo - intrusion alarm using a printed electronic sealLabel to sensor attachment using anisotropicconductive adhesives - Low cost chip-less and passive solutions - Uses the reader infrastructure already in place for electronic article surveillance (anti- theft)
Data logging using Battery AssistedPassive RFID System integration of a low cost smart label for measurement of water content in different materials
Smart packaging demo - Active logging intrusion alarm• If the electronic seal is tampered with the smart label will record it and provide the exact time of intrusion• Readout using standard EPC gen2 RFID platform Electronics inside the box The sealing tape is all (can be printed on the box) that is visible
Additional demons to be presented using the semi-passive sensor platform• System integration of RFID platform an – Accelerometers – chock and tilt – Light detection for intrusion alarm enhancement – Pressure for vacuum sealed packages – Simple gas sensors (nano particle based) – Strain
Conclusions• Nanoparticle based printed thin film transistors have been developed and evaluated.• Some concepts to integrate printed large area sensors with standard RFID technology has been demonstrated• Printed moisture sensors have been evaluated and used in demonstrator setups• Printed WORM memory technology has been developed and evaluated for use with EPC RFID tags• Five patents have been filed during the project and in total 45 publications have been published