Abstract:
A method for analyzing a sample includes providing a sensor assembly having a sensing region with a plurality of resonant circuits, and a plurality of tuning elements. The method further includes exposing the sensor assembly to an environment comprising the sample, and probing the sample with one or more frequencies generated by the sensor assembly. Furthermore, the method includes determining an impedance of a sensor response over a measured spectral frequency range of the sensor assembly, and relating measurement of impedance of the sensor assembly to at least one environmental property of the sample.
Abstract:
A monitoring system for monitoring environmental conditions for rotary members includes a plurality of stationary reader antennas positioned proximate rotary members. A first sensor is coupled to a first rotary member and a second sensor is coupled to a second rotary member. Each sensor is configured to generate environmental condition data. A key phasor is coupled to a third rotary member and configured to generate key phasor data. The monitoring system also includes a data integrator communicatively coupled to each stationary reader antenna and configured to determine measurement values for the first and second environmental condition based on raw data from each stationary reader antennas and data from the key phasor.
Abstract:
This disclosure describes a sensor comprising a single- or multi- resonant transducer (12, 31) to determine the composition or concentration, or both, of one or more components of an emulsion or dispersion. In some examples, the sensor is used to measure the type or concentration, or both, of clay in water or in a mixture of oil and water.
Abstract:
An ohmic RF MEMS relay includes a substrate with a capacitive coupling, C sub ; two actuating elements electrically coupled in series, so as to define a channel, wherein the actuating elements are configured to be independently actuated or simultaneously operated. The actuating elements have their own capacitive coupling, C gap ; a midpoint on the channel is in electrical communication with the actuating elements; and an anchor mechanically coupled to the substrate and supporting at least one of the actuating elements. Also, an ohmic RF MEMS relay that includes an input port; a plurality of first MEMS switches that make up a first switching group in electrical communication with the input port, thereby defining a plurality of channels each leading from each of the MEMS switches; and at least one outlet port along each of the channels distal from the first switching group and in electrical communication with the input port.
Abstract:
A measurement tool configured to be ran through a bore of a hydrocarbon well. The measurement tool includes a dielectric core, a controller disposed at a first end of the dielectric core, a -first wire helically disposed about the dielectric core and extending from the controller to a first location a first distance from the controller, and a second wire helically disposed about the dielectric core and extending from the controller to a second location a second distance from the controller. The controller provides first and second input signals to the first and second wires, and receives first and second reflected signals from the first and second wires.
Abstract:
A RF MEMS package includes a MEMS die assembly having a signal line (46) formed on a top surface of a first mounting substrate (42), the signal line comprising a MEMS device (48) selectively electrically coupling a first portion of the signal line to a second portion of the signal line, and two pairs of ground pads (52, 54, 56, 58) formed on the top surface of the first mounting substrate adjacent respective portions of the signal line. The pairs of ground pads are positioned adjacent respective sides of the MEMS device. A ground assembly (43) is electrically coupled to the pairs of ground pads and includes a second mounting substrate and a ground region (62) formed on a surface of the second mounting substrate. The ground region faces the top surface of the first mounting substrate and is electrically coupled to the pairs of ground pads. A cavity is formed between the ground region and the signal line.
Abstract:
A radio frequency (RF) microelectromechanical system (MEMS) package includes a first mounting substrate, a signal line formed on a top surface of the first mounting substrate, the signal line comprising a MEMS device selectively electrically coupling a first portion of the signal line to a second portion of the signal line, and a ground assembly coupled to the first mounting substrate. The ground assembly includes a second mounting substrate, a ground plane formed on a bottom surface of the second mounting substrate, and at least one electrical interconnect extending through a thickness of the second mounting substrate to contact the ground plane, wherein the ground plane is spaced apart from the signal line.
Abstract:
A system for measuring nutritional parameters of food items is provided. The system includes a holding cavity. The system further includes a sensor assembly that includes a transmitter antenna and at least one receiver antenna. The transmitter antenna is configured to transmit signals to a food item in the holding cavity. The receiver antenna is configured to receive response signals from the food item. The system includes at least one switch coupled to each antenna. The switch, in a first state, is configured to set the sensor assembly to an electric potential equal to that of the holding cavity. In a second state, the switch is configured to couple the sensor assembly to a power source. The system also includes a processing unit to process the signals received to determine the nutritional parameters of the food item.
Abstract:
A resonant sensor assembly includes a dielectric substrate having a sensing region. The sensor assembly further comprises a plurality of tuning elements operatively coupled to the sensing region, where the sensing region is coupled to the plurality of tuning elements to define a plurality of resonant circuits.
Abstract:
A method for analyzing a sample includes providing a sensor assembly having a sensing region with a plurality of resonant circuits, and a plurality of tuning elements. The method further includes exposing the sensor assembly to an environment comprising the sample, and probing the sample with one or more frequencies generated by the sensor assembly. Furthermore, the method includes determining an impedance of a sensor response over a measured spectral frequency range of the sensor assembly, and relating measurement of impedance of the sensor assembly to at least one environmental property of the sample.