Method and apparatus for interfacial sensing
First Claim
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1. A sensor system comprising:
- a sensor; and
an actuator for actuating said sensor;
said actuator being enabled for operation at a first operating condition of said sensor when placed proximate to a sample, and wherein said actuator is enabled for a second operating condition of the sensor when placed proximate to the sample.
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Abstract
A sensor is disclosed for analyzing information, such as interfacial interactions, found in various systems. A sensor is located proximate to an interface that is to be studied. The sensor is actuated in order to produce acoustical signals. The frequency of oscillation of the sensor is varied in order to enable the sensor to produce acoustical signals at different harmonics. The different acoustical signals are used to analyze the system at various distances from the surface of the sensor.
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Citations
50 Claims
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1. A sensor system comprising:
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a sensor; and an actuator for actuating said sensor;
said actuator being enabled for operation at a first operating condition of said sensor when placed proximate to a sample, and wherein said actuator is enabled for a second operating condition of the sensor when placed proximate to the sample. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A sensor system, comprising:
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a sensor; an actuator for actuating said sensor to cause an acoustic response at said sensor, said actuator configured for variation of an operating condition of the sensor when the sensor is placed proximate to a sample; and a signal processor for capturing the acoustic response. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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35. A method for sensing comprising the steps of:
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providing a sensor proximate a sample to be sensed; exciting the sensor at a first operating condition; measuring a resonance feature of said sensor; changing the operating condition of said sensor to at least one additional operating condition, and measuring the resonance feature of said sensor at said at least one additional operating condition. - View Dependent Claims (36, 37, 38, 39, 40, 41, 42, 43)
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44. A method for sensing comprising the steps of:
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selecting an interrogation distance from a surface of an excitable sensor, exciting the sensor at a frequency that interrogates at the selected interrogation distance from said surface of said sensor, and measuring a resonance feature of said sensor. - View Dependent Claims (45, 46, 47, 48, 49)
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50. A method for sensing comprising the steps of;
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providing a sensor with known mass and fundamental frequency proximate a sample containing a particle to be sensed; exciting the sensor at a fundamental frequency of the sensor coupled to the particle; measuring the resonant frequency of said coupled sensor and particle;
calculating the diameter of the particle coupled to the sensor using the measured resonant frequency.
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Specification