Methods and Apparatus for Determining Properties of a Fluid
2 Assignments
0 Petitions
Accused Products
Abstract
A method and system for determining properties of a fluid involves interacting the fluid with a standing wave in a first state to establish the standing wave in a second state, analyzing an electric signal associated with the standing wave to determine a characteristic associated with the second state, and determining the property of the fluid by comparing the characteristic with a function that associates a plurality of properties with a corresponding plurality of characteristics. The characteristic can include a maximum phase slope, a phase slope associated with a resonant frequency, a maximum magnitude associated with the resonant frequency, the value of the resonant frequency, or any combination thereof.
73 Citations
36 Claims
-
1-22. -22. (canceled)
-
23. A method for determining a viscosity of a fluid in a biosensing or chemical sensing application, the method comprising:
-
interacting the fluid with a standing wave having a first characteristic to establish a second characteristic;
measuring a frequency domain signal associated with the first or second characteristic to determine a signal value based on a maximum phase slope, a phase slope at a resonant frequency of the signal, a maximum magnitude, or a magnitude at the resonant frequency of the signal; and
comparing the signal value to a function associating a plurality of viscosity values with a corresponding plurality of signal values to determine a viscosity value of the fluid. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
-
-
35. A method for determining a density of a fluid in a biosensing or chemical sensing application, the method comprising:
-
interacting the fluid with a standing wave having a first characteristic to establish a second characteristic;
measuring a frequency domain signal to determine a resonant frequency of the standing wave; and
determining density of the fluid by comparing the resonant frequency with a function that correlates a plurality of densities with a corresponding plurality of resonant frequencies.
-
-
36. A method for determining a property of a fluid, the method comprising:
-
providing an input signal to a resonant device to establish a standing wave in a surface of the resonant device, the standing wave having a first characteristic;
interacting the fluid with the standing wave to establish a second characteristic;
measuring an output signal of the resonant device in the frequency domain;
associating the output signal with the input signal or a reference signal to generate a second signal for selecting a signal value in the frequency domain, the signal value including a maximum phase slope, a phase slope at a resonant frequency, a maximum magnitude, or a magnitude at the resonant frequency of the second signal; and
determining the property of the fluid by comparing the signal value to a function that correlates a plurality of fluid properties with a corresponding plurality of signal values.
-
Specification