Abstract:
Aspects and features of this disclosure include a gas sensing platform with small, low-power, wireless gas sensor packages for selective detection of VOCs released from plants under different conditions, including abiotic or biotic stress conditions. The sensor packages for the platform can be implemented using an array of capacitive micromachined ultrasonic transducer (CMUT) arrays, in which elements are functionalized with a variety of materials. A computing platform can receive data from the arrays of sensors. The computing platform can determine a characteristic about a nearby plant or nearby plants based on chemicals detected in the gas emissions from the plants and produce a plant condition assessment based on the characteristic.
Abstract:
A method to acquire the structural health state of an aircraft mechanical component performs measurements at each frequency point of interest by using a network of transducers and working each one simultaneously as actuator and sensor. Each transducer is individually excited by a sinusoidal, constant frequency and arbitrary amplitude, voltage waveform for each arbitrary frequency point used to interrogate the structure. A dedicated hardware executes an analogical (analog) quantization to measure electrical current and average electrical power consumed by each transducer. With these two variables, the electromechanical signature of the structure is obtained at different areas of the monitored structure.
Abstract:
Methods and devices are disclosed for testing an acoustic probe having transducing elements for converting between acoustic and electrical signals. An electrical signal is generated at a frequency with a testing device capable of generating electrical signals over a range of frequencies. The electrical signal is transmitted to at least some of the transducing elements to measure a complex impedance and thereby evaluate a performance of the transducing elements.
Abstract:
The invention provides a chemical detection system for detecting at least one target chemical species, including a self-sensed cantilevered probe array having a plurality of self-sensed cantilevered probes, at least one chemical-sensitive coating material applied to at least one cantilevered probe in the cantilevered probe array, and an interface circuit that is coupled to the cantilevered probe array. At least one cantilevered probe in the cantilevered probe array exhibits a shifted cantilevered probe response when the cantilevered probe array is exposed to the target chemical species and the interface circuit actuates the cantilevered probe. A handheld chemical detection system and a method of operation are also disclosed.
Abstract:
An integrated system for determining a hemostasis and oxygen transport parameter of a blood sample, such as blood, is disclosed. The system includes a measurement system, such as an ultrasonic sensor, configured to determine data characterizing the blood sample. For example, the data could be displacement of the blood sample in response to ultrasonic pulses. An integrated aspect of the system may be a common sensor, sample portion or data for fast and efficient determination of both parameters. The parameters can also be used to correct or improve measured parameters. For example, physiological adjustments may be applied to the hemostatic parameters using a HCT measurement. Also, physical adjustments may be applied, such as through calibration using a speed or attenuation of the sound pulse through or by the blood sample. These parameters may be displayed on a GUI to guide treatment.
Abstract:
The invention provides a chemical detection system for detecting at least one target chemical species, including a self-sensed cantilevered probe array having a plurality of self-sensed cantilevered probes, at least one chemical-sensitive coating material applied to at least one cantilevered probe in the cantilevered probe array, and an interface circuit that is coupled to the cantilevered probe array. At least one cantilevered probe in the cantilevered probe array exhibits a shifted cantilevered probe response when the cantilevered probe array is exposed to the target chemical species and the interface circuit actuates the cantilevered probe. A handheld chemical detection system and a method of operation are also disclosed.
Abstract:
A method for determining the concentration of a large particle component in a multi-component system. The method requires first separating and concentrating the large particle component of the system by acoustic means and then measuring an acoustical parameter of the separated large particle component. The invention also provides for an apparatus for determining the concentration of large particles in a multi-component fluid system. The apparatus is comprised of an acoustic standing wave resonator, at least one acoustic standing wave generating source, electronic circuitry for actuating, controlling and processing the acoustic standing wave generating source and means for measuring at least one parameter of the multi-component system after the large particles have been concentrated and aggregated by the generated standing wave(s).
Abstract:
A method for analysis of a multi-component fluid is provided based on the features of the dynamics of the self-organization processes in drying drops. An electro-acoustic resonator is utilized, with a drop of multi-component fluid placed on one end of the resonator. A shear oscillation is imparting to the resonator along its longitudinal axis. And oscillating electric voltage is placed across the resonator generally perpendicular to the direction of mechanical oscillation. Changes in the electrical conductance corresponding to changes in the acoustical-mechanical impedance can thereby be measured as the drop of multi-component liquid dries. The particular geometry of an amplitude curve includes identifying the spatio-temporal development and phase transitions is used for integral estimation of food authenticity and quality.
Abstract:
A method of non-destructive evaluation (NDE) testing a component of an assembly is provided. The method includes positioning a transducer on a face of the component, transmitting ultrasonic waves into the component at a plurality of steering angles, receiving ultrasonic echoes, wherein each received echo is indicative of an acoustic impedance interface within the component, and analyzing the ultrasonic echoes.