Particle-sensing device
AssigneeUniversity of Warwick
InventorsJan Specht, Marina Cole, Siavash Esfahani, Julian Gardner
Life of this patent
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Abstract
A device for particle sensing is disclosed. The device includes a sensor including a bulk acoustic wave resonator having a resonant frequency, an acoustic mirror arranged to support the resonator, and a heater in thermal communication with the resonator such that a resonator temperature is based on a heater temperature. The device also includes circuitry connected to the sensor. The circuitry comprises a driver configured to drive the heater with a driver signal having a constant periodic cycle, and an oscillator configured to generate an output signal indicative of the resonant frequency. The resonant frequency is modulated by the resonator temperature.
Claims13
A device for sensing particles in a sample, the device comprising:
- a sensor comprising:
- a bulk acoustic wave resonator having a resonant frequency;
- an acoustic mirror arranged to support the resonator;
- and
- a heater in thermal communication with the resonator such that a resonator temperature is based on a heater temperature;
- circuitry connected to the sensor, wherein the circuitry comprises:
- a driver configured to drive the heater with a driver signal having a constant periodic cycle;
- an oscillator configured to generate an output signal indicative of the resonant frequency, wherein the resonant frequency is modulated by the resonator temperature such that the resonant frequency has a periodic cycle;
- and
- a processor configured to determine particle composition and/or concentration of the sample based on the output signal, wherein the determination involves considering a change in the periodic cycle of the resonant frequency.
Dependencies are inferred from the claim text.