SENSEOR Patent applications |
Patent application number | Title | Published |
20130218498 | Method of Interrogation of a Differential Sensor of Acoustic Type Having Two Resonances and Device Implementing the Method of Interrogation - A method of interrogating a surface acoustic wave differential sensor formed by two resonators is provided, wherein the method allows the measurement of a physical parameter by determination of the difference between the natural resonant frequencies of the two resonators, which difference is determined on the basis of the analysis of a signal representative of the level of a signal received as echo of an interrogation signal, for a plurality of values of a frequency of the interrogation signal in a domain of predetermined values; the analysis can be based on the cross-correlation of the said signal representative of the level according to a splitting into two distinct frequency sub-bands. An advantage is that it may be implemented in a radio-modem. | 08-22-2013 |
20130211747 | Method of Interrogating a Sensor of Surface Acoustic Wave Type - A method of interrogating sensors of SAW type, which allows notably the gathering of physical measurements of parameters carried out by SAW sensors, the method for gathering the measurement of an SAW sensor comprising a first step of generating and emitting an electromagnetic signal corresponding to the dilated time-reversal of a dilation coefficient k, of an impulse response signature which is characteristic of the SAW sensor, a second step of gathering a signal received as echo originating from the SAW sensor, a third step of determining a maximum of cross-correlation of the signal received as echo during the second step, the first step being applied with a set of values of the dilation coefficient k in a determined domain, the measurement of a physical parameter then being determined by the dilation coefficient k for which the power or the amplitude of the signal gathered as echo is a maximum. | 08-15-2013 |
20130205906 | LOW-COST TEMPERATURE AND PRESSURE SENSOR COMPRISING SAW RESONATORS, AND METHOD OF FABRICATION FOR SAME - A pressure and temperature sensor comprising comprises at least a first resonator of the SAW type comprising a piezoelectric substrate, thinned at least locally, of the membrane type, a second resonator of the SAW type comprising a piezoelectric substrate and a third resonator of the SAW type comprising a piezoelectric substrate, characterized in that the first, the second and the third resonators are respectively on the surface of first, second and third individual piezoelectric substrates, each of the individual substrates being positioned on the surface of a common base section, locally machined away under said first resonator in such a manner as to liberate the substrate from said resonator so as to render it operational for the measurement of pressure. A method of fabrication for such a sensor is also provided. | 08-15-2013 |
20120206996 | TRANSPONDER HAVING COUPLED RESONANT MODES AND INCLUDING A VARIABLE LOAD - A transponder including a first resonator and a series of one or more second resonators with coupling of evanescent waves exhibiting at least one first resonant mode and one second resonant mode, said first resonator being connected via a first port, to a first means allowing an interrogation, wherein said second resonators are connected via at least one second port, to at least one variable load element capable of modifying coupling conditions of the resonant modes and consequently a response measured on said first port. | 08-16-2012 |
20110241482 | Method of Rapidly Interrogating Elastic Wave Sensors - A method of remotely interrogating a passive sensor, comprising at least one resonator, so as to determine the resonant frequency of said resonator, having a resonant frequency response defined by the design of said resonator, includes: a preliminary frequency-scan step for interrogating said resonator over a frequency range allowing for the rapid determination of a first resonant frequency (fr | 10-06-2011 |
20110012477 | Surface-Wave Passive Sensor Including an Integrated Antenna, and Medical Applications Using Such a Type of Passive Sensor - A remotely interrogatable passive sensor is provided. The sensor comprises an antenna and at least one surface wave resonator including a transducer with inter-digitated electrodes with two ports on the surface of a piezoelectric substrate, in which the antenna comprises conducting elements connected to the two ports and integrated onto said piezoelectric substrate. Advantageously, the antenna elements are folded on the substrate to enhance compactness. The passive sensor can be used for medical applications such as tissue analysis or arterial pressure measurement. | 01-20-2011 |
20100332157 | Method for Querying a Piezoelectric Resonator and Querying Device Implementing Said Querying Method - A method for interrogating a passive sensor comprising at least one piezoelectric resonator includes the following steps:
| 12-30-2010 |
20100319184 | Method of Collective Fabrication of Calibration-Free Temperature and/or Strain Sensors by Matching of Resonators on the Basis of Resonant Frequency and Static Capacitance Criteria - A method of collective fabrication of remotely interrogatable sensors, each sensor comprising at least one first resonator and one second resonator, each resonator comprising acoustic wave transducers designed such that they exhibit respectively a first and a second operating frequency, is provided. The method comprises the fabrication of a first series of first resonators (RT | 12-23-2010 |
20100313398 | PROCESS FOR THE COLLECTIVE FABRICATION OF CALIBRATION-FREE SENSORS BASED ON ACOUSTIC WAVE DEVICES - The invention relates to a process for the collective fabrication of a remotely interrogable sensor having at least one first resonator and one second resonator. Each resonator exhibits respectively a first and a second operating frequency. A first series of first resonators are fabricated. The first resonators each have a first operating frequency belonging to a first set of frequencies centered on a first central frequency. A second series of second resonators are fabricated. The second resonators each having a second operating frequency belonging to a second set of frequencies centered on a second central frequency. A series of pairings of a first resonator and of a second resonator are conducted so as to form pairs of resonators exhibiting a difference of operating frequencies which is equal to the difference of the first and second central frequencies. | 12-16-2010 |
20100289380 | Surface Wave Resonator Having Reduced Parasitic Resonance - The invention relates to a surface acoustic wave resonator produced on a cut substrate with propagation axes for which a nonzero directivity exists and comprising at least one central transducer (Tc) exhibiting a central axis, a first array of reflectors (R | 11-18-2010 |
20090122830 | SURFACE ACOUSTIC WAVE TRANSPONDERS - The field of the invention is that of surface acoustic wave transponders and associated devices. This invention applies more particularly to the techniques for identifying and locating transponders. It also applies to the transmission of information or measurements, the transponder then being used as a transducer. This type of transponder can, in particular, be used on vehicles, and in particular on road vehicles. The inventive transponder ( | 05-14-2009 |