Universidad Politècnica De València

Advanced Wave Sensors,s.l.

Yolanda Jiménez Jiménez

Antonio Arnau Vives

Antonio Reig Fabado

Román Fernández Díaz

Yeison Montagut Ferizzola

José Vicente García Narbon

José Vicente García Narbón

Pablo García Mollá

Maria Calero Alcarria

A method and device for characterizing the response of resonant sensors. The method is based on an analytic algorithm that establishes a relationship between the complex admittance G of the sensor, measured at a single test frequency, the variations in resonance frequency and the losses, such as the quality factor at the acoustic resonator. The device includes at least one piezoelectric resonator on whose surface is deposited a thin layer of material, a fluid medium in contact therewith, a stable signal source, a frequency synthesis subsystem, a multiplex subsystem that enables the excitation/interrogation of a particular resonator, a signal conditioning and acquisition subsystem, a control subsystem based on the use of digital integrated circuits enabling the coordinated control of the different subsystems that make up the device.

Method and device for characterising the response of resonant sensors

The invention relates to a method, to a device for electronic characterization, and to a measurement cell and support for monitoring a chemical or physical process with results that can be assessed in terms of the weight variation of a coating deposited on a piezoelectric sensor, exposed to a fluid medium with stable physical properties. The invention uses the deduction of an analytic expression establishing a simple connection between the phase variation of a fixed-frequency signal, which queries the piezoelectric resonator, and the variation in the bulk density of the coating. The invention is suitable for implementations that use piezoelectric resonators for characterizing biochemical and electrochemical processes, such as, inter alia: piezoelectric biosensors and immunosensors, process and material characterization by AC electrogravimetry, detection of dissolved chemical or biological substances.

Method and device for nanogravimetry in fluid media using piezoelectric resonators

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Valencia, Spain

Yolanda Jiménez Jiménez