Abstract:
An inspection apparatus includes a communication unit including a first transmitter and a second transmitter. The communication unit is coupled to an on-board computing device including at least one processor coupled to a memory device. The processor is configured to obtain a position of the inspection apparatus, unprocessed image data, and fluid concentration data for at least one fluid. The processor geotags the data with the position of the inspection apparatus and transmits the data to a remote processing device. The geotagged image data is transferred using the first transmitter and the geotagged fluid concentration data is transmitted using the second transmitter.
Abstract:
A sensing system for monitoring an industrial fluid is presented. The sensing system includes a housing and a sensor probe disposed at least partially in the housing, where the sensor probe includes a substrate, a sensing region disposed on the substrate, a first coil disposed on the substrate and coupled to the sensing region, and a second coil disposed on the substrate and coupled to the first coil. A method for operating the sensing system is also presented.
Abstract:
A sensor for detecting gaseous agents has a transducer, which includes an electrical resonant circuit that forms an antenna. The sensor further includes a sensing material that is disposed on at least a portion of the transducer. The sensing material is configured to simultaneously exhibit a capacitance response and a resistance response in the presence of a gaseous agent. The sensor may be reversible, battery free, and may require no electrical contact with a sensor reader.
Abstract:
A sensor system includes a multi-frequency sensor assembly including a single sensor body housing with a sensing region circuit and a sensor reader disposed in the sensor body. The sensor body is configured to be in operational contact with a fluid. The sensing region circuit is configured to generate different electric fields having different frequencies in the fluid. The sensor reader includes one or more processors configured to examine one or more impedance responses of the sensing region circuit at different frequencies and to determine one or more properties of the fluid based on the one or more impedance responses that are examined.
Abstract:
A multivariable sensing device for sensing one or more parameters of a process fluid disposed in a container is provided. The multivariable sensing device includes a radio frequency based sensor configured to sense a physical parameter, a chemical parameter, a biological parameter, or combinations thereof, representative of the process fluid. The radio frequency based sensor includes a sensor substrate, a radio frequency coil disposed on at least a portion of the sensor substrate, and a support structure configured to be physically coupled to the container. Further, the support structure is configured to position the radio frequency based sensor in operative proximity to an inside of the container.
Abstract:
A method for multivariable measurements using a single-chip impedance analyzer includes providing a sensor, exposing the sensor to an environmental parameter, determining a complex impedance of the sensor over a measured spectral frequency range of the sensor, and monitoring at least three spectral parameters of the sensor.
Abstract:
The techniques described herein provide sensing systems and methods that provide configurable sensitivity and extended dynamic range of gas measurements. The systems and methods apply dielectric excitation at two or more excitation frequencies to a sensing material via sensing electrodes. A linearity of the electrical signal is changed by changing the operation parameters of the gas sensing element of the sensor.
Abstract:
A sensor system is described with improved measurement accuracy that is achieved by reducing noise, baseline drift, or both based on processing a group of sensor element response signals. The response signals may be received in response to providing stimuli to the sensor element using different excitation frequencies over time. For example, the sensor circuitry may provide excitation signals to the sensing element with multiple excitation frequencies over time. The sensor system may include storage and processing circuitry to receive the response signals and to generate the correction values based on analyzing the received response signals. The sensor system may then provide adjusted response signals by reducing the noise, baseline drift, or both based on the correction values.
Abstract:
A system and a method for gas sensing while correcting for an interferent condition around a gas sensor. The gas sensor provides dielectric excitation of a gas sensing element and an interferent-compensating sensing element arranged as a single electrical circuit at a set of frequencies, measures impedance responses of the gas sensing element and the interferent-compensating sensing element to the dielectric excitation at the set of frequencies, determines, based on the impedance responses of the gas sensing element and the interferent-compensating sensing element to the dielectric excitation the identities, the respective concentrations, or a combination thereof, of at least one analyte gas of the monitored environment, corrected for one or more sensed interferent conditions of the ambient environment.
Abstract:
A sensor system includes a multi-frequency sensor assembly including a single sensor body housing with a sensing region circuit and a sensor reader disposed in the sensor body. The sensor body is configured to be in operational contact with a fluid. The sensing region circuit is configured to generate different electric fields having different frequencies in the fluid. The sensor reader includes one or more processors configured to examine one or more impedance responses of the sensing region circuit at different frequencies and to determine one or more properties of the fluid based on the one or more impedance responses that are examined.