Abstract:
A gas turbine engine includes a casing, a probe, and a fairing. The probe extends through the casing and the fairing is disposed within the casing. The fairing is engaged by the probe to prevent circumferential movement of the fairing relative to the casing.
Abstract:
A method and apparatus for measuring the change in temperature of a material being heated. In one embodiment, the method includes introducing particles having magnetic susceptibility into the material; heating the material and particles; measuring, using a circuit having a resonant frequency, the change in the resonant frequency of the circuit as the temperature of the particles changes; and correlating the change in resonant frequency to a change in temperature. In one embodiment, the apparatus includes a collection of magnetic particles in contact with the material undergoing heating; a resonance circuit including a tank circuit including a coil and capacitance and having a resonant frequency; an alternating current variable frequency source capable of tracking changes in the resonant frequency of the tank circuit to maintain the frequency of the alternating current at the resonant frequency of the tank circuit; and a processor in communication with the alternating current source.
Abstract:
A low profile temperature transducer has a working surface for placement against a body surface and a first output. The transducer is a flat laminate composed of alternating conductive and dielectric layers. The laminate defines at least one slotline antenna for exposure to the body surface to pick up thermal emissions from the underlying tissue at depth. A feed network having a characteristic impedance is connected to the first output and a slotline-to-stripline transition is connected between the at least one antenna and the feed network, the transition providing a match between the impedance at the at least one antenna and the characteristic impedance. Also, a temperature sensor may be present at the working surface to detect the body surface temperature under the transducer, that surface temperature being used to calculate actual temperature at depth.
Abstract:
Apparatus, systems and methods employing contact lens sensors are provided. In some aspects, a contact lens includes a substrate and a circuit. The circuit can include: one or more sensors disposed on or within the substrate, that sense a feature associated with a wearer of the contact lens; and a compensation circuit disposed on or within the substrate, coupled to the sensor(s) and that outputs information to adjust an output of the sensor(s). The compensation circuit can include: a temperature component that senses the temperature of the sensor(s); and a communication component that outputs information indicative of the temperature of the sensor(s), and receives information associated with adjusting the output of the sensor(s). In other aspects, a contact lens includes a circuit that senses the body temperature, or ambient temperature outside of the body, of the contact lens wearer. Sensor fusion and/or calibration can be performed based on the information.
Abstract:
A method for determining a value of a parameter of an object or an environment includes positioning a device having a balanced circuit in or on an object or within a particular environment, wherein the balanced circuit comprises elements which are operationally sensitive to changes in a parameter of the object or the environment. The method further includes measuring a common mode signal of the balanced circuit and determining, from the common mode signal, a value of the parameter. An exemplary implementation of the method includes determining temperature using a resistive sensor having a Wheatstone bridge circuit with two variable resistors and two fixed resistors. Embodiments of systems and devices configured to employ such methods are provided, particularly medical probes, electronic signal monitoring devices, and systems employing such devices.
Abstract:
A method for determining a value of a parameter of an object or an environment includes positioning a device having a balanced circuit in or on an object or within a particular environment, wherein the balanced circuit comprises elements which are operationally sensitive to changes in a parameter of the object or the environment. The method further includes measuring a common mode signal of the balanced circuit and determining, from the common mode signal, a value of the parameter. An exemplary implementation of the method includes determining temperature using a resistive sensor having a Wheatstone bridge circuit with two variable resistors and two fixed resistors. Embodiments of systems and devices configured to employ such methods are provided, particularly medical probes, electronic signal monitoring devices, and systems employing such devices.
Abstract:
A system includes sensors for transmitting data on a low power and/or short range transmission link, and one or more coordinators in wireless communication with the sensors. The coordinators convert signals received via the low power and/or short range transmission link to a longer range transmission link. A base station is in wireless communication with the coordinators via the longer range transmission link so that data generated by the sensors is transferred to the base station via the coordinators.
Abstract:
The invention relates to a temperature measuring device for a respiratory humidifier (1) having a liquid container (5), said temperature measuring device comprising a flow channel (9) for breathing gas and an infrared detector (21) that is oriented onto the flow channel (9) from the exterior for the contactless detection of the temperature of the breathing gas in the flow channel (9). The outer surface (13) of the flow channel (9) comprises a measuring portion (15) that is aligned with the surrounding portions of the outer surface (13), the infrared detector (21) being directed towards said measuring portion. The flow channel (9) comprises a flow guiding element (17) that guides the breathing gas flow onto the measuring portion (15) at a predetermined impingement angle which is preferably greater 10° and smaller 170°.
Abstract:
Devices, systems, and methods for sensing and derived information conveyance as disclosed. One electrical device includes an electronic circuit and executable instructions provided by at least one of: software stored in memory associated with the circuit or provided in firmware within the circuit, wherein the circuit receives raw sensor data from one or more sensors associated with the circuit, analyzes the data, and creates a report document that includes one or more features of the analysis of the data.
Abstract:
Bei einer Vorrichtung (1) zur Messung der von einer Hautoberfläche (30) durch Diffusion abgegebenen Menge eines Stoffes, mit einem auf der Hautoberfläche (30) plazierbaren Messkopf, ist vorgesehen, dass der Messkopf mindestens zwei Messeinrichtungen (2) aufweist, die voneinander beabstandet angeordnet sind, wobei die insgesamt mindestens zwei Messeinrichtungen (2) unabhängig voneinander beweglich sind, so dass sie beim Aufsetzen auf die Hautoberfläche an die Krümmung der Hautoberfläche (30) anpassbar sind.