A French scientist has designed a new type of chip-free identification tags, printable and recyclable, and which can also serve as a sensor, especially fromhumiditand or templateÉrature.
Lecturer and head of the ORSYS team of the design and integration of systems laboratory (Grenoble INP/ UGA), Etienne Perret is at the origin of a characterization method based on the principle of reflectometry and on the use of resonant elements that he has developed in the laboratory. The latter gave birth to identification labels without a chip, printable, recyclable and inexpensive. Unlike bar codes, These labels are readable through opaque objects or from a distance. Likewise, It is possible to implement new features incompatible with bar technology. Finally, as they do not include a chip or antenna, They are much less expensive than RFID labels.
The only difference in radiofrequency identification labels (known as Chippless RFID) with bar codes, lies in their form as well as in the use of conductive ink deposited during printing. Each label, created separately or printed directly on the product to be identified, has an electromagnetic signature which contains specific information to the product.
ReinScriptible labels
"The driver ink interacts with the wave which is sent to the label, specifies Etienne Perret. The information contained in the specific signature of the reflected wave is recovered by a reader. "All the art of the scientist consisted in developing the method which makes it possible to dimension and draw the labels according to the information that we want to register there. In addition to being inexpensive and flexible in terms of reading, These labels can be re -enrollpable, which allows them to differentiate themselves very clearly from bar codes from an application point of view. "This new feature brought to printed paper labels with conventional techniques is undoubtedly the most awaited application. »
These labels can also be used as a sensor, particularly humidity or temperature. "In the latter case, Just add to the ink a material sensitive to humidity, This will modify the rebroadcast in real time and thereby the electromagnetic signature of the label recovered by the reader. Etienne Perret and his team also use this label technology to recognize gestures. So, These disposable paper tags can serve as an interface between a user and a machine, Like a remote control or a joystick. "The difference here that they will not include any electronic chip and will be made by printing as a barcode. Packaging printed, They will bring him new features that do not exist at the moment, especially thanks to their simplicity of implementation. »
