摘要:
A vaporizer for vaporizing a liquid comprises a heating element for receiving electrical power and for delivering thermal power to a liquid to be vaporized and a temperature sensor for sensing the temperature of the heating element. The temperature sensor and the heating element are directly mechanically connected and thermally coupled.
摘要:
In an embodiment a sensor arrangement includes a sensor element including a ceramic base body and at least two electrodes, wherein the electrodes are arranged on an outer side of the ceramic base body, at least two contacting elements configured for making electrical contact with the sensor element, the contacting elements being connected to the electrodes in a connection region and a glass sheath, wherein at least the ceramic base body and the connection region are completely enclosed in the glass sheath, wherein the glass sheath is pressure tensioned, and wherein a coefficients of expansion of the glass sheath, the contacting elements and the sensor element are adapted to one another for the pressure tensioning of the glass sheath.
摘要:
A resistance temperature detector (RTD) that uses a ceramic matrix composite (CMC), such as a silicon carbide fiber-reinforced silicon carbide matrix, as an active temperature sensing element, which can operate at temperatures greater than 1000° C. or even 1600° C. Conductive indium tin oxide or a single elemental metal such as platinum is deposited on a dielectric or insulating layer such as mullite or an environmental barrier coating (EBC) on the substrate. Openings in the layer allow etching of the CMC surface in order to make high quality ohmic contacts with the conductive material, either directly or through a silicide diffusion barrier such as ITO. The RTD can measure both temperature and strain of the CMC. The use of an EBC, which typically is deposited on the CMC by the manufacturer, as the insulating or dielectric layer can be extended to other devices such as strain gages and thermocouples that use the CMC as a sensing element. The EBC can be masked and etched to form the openings. A conductive EBC can be used as the silicide diffusion barrier.
摘要:
A three-dimensional micro-structure has a plurality of adjacent micro-columns which are arranged at a distance from each other and essentially parallel in relation to the respective longitudinal extension. The micro-columns are made of at least one micro-column material having respectively an aspect ratio in the region of 20-1000 and respectively a micro-column diameter in the region of 0.1 μm-200 μm. A micro-column intermediate chamber is arranged between adjacent micro-columns having a micro-column distance selected from between the adjacent micro-columns in the region of 1 μm-100 μm. According to a method for producing the three-dimensional micro-structures: a) a template is provided with template material, b) the micro-column material is arranged in the column-like cavities, and c) the template is at least partially removed.
摘要:
The invention relates to a thermocouple (17) suspended from a part (26, 27) that can be locked onto a connecting section of the measuring stick, which comprises an opening in the form of a guiding cone (30) for inserting the thermocouple. The thermocouple is contained in a flexible cable (24) that can slide in a sheath (35) of the central compartment (16) which houses the thermocouple (17). A spring (34) can be added to lightly press the end of the thermocouple to the end of the housing thereof.
摘要:
A device for monitoring the temperature surrounding a circuit, including: a charge storage element; a charge evacuation device; and a thermo-mechanical switch connecting the storage element to the evacuation element, the switch being capable of closing without the circuit being electrically powered, when the temperature exceeds a threshold.
摘要:
Systems and methods for characterizing one or more properties of a material are disclosed. In some embodiments, the one or more properties include one or more thermal properties of the material, one or more thermoelectric properties of the material, and/or one or more thermomagnetic properties of the material. In some embodiments, a method of characterizing one or more properties of a sample material comprises heating the sample material and, while heating the sample material, obtaining one or more temperature measurements for at least one surface of the sample material via one or more thermoreflectance probes and obtaining one or more electric measurements for the sample material that correspond in time to the one or more temperature measurements. The method further comprises computing one or more parameters that characterize one or more properties of the sample material based on the measurements.
摘要:
A process measures the temperature of the space between one or more pieces that are subject to a rising temperature during a welding or a setting operation. Thermoelectric sources are used to form at least one of the interfaces placed between at least one electrode (5; 10,11) and the pieces (1; 13, 14) and between the pieces, to supply thermoelectricity by an electric resistance (16), to measure the current that flows through resistance (16).
摘要:
A cartridge heater with improved thermocouple comprising a tubular metal sheath with a front end having a central opening therein, a metal plug engaged in and closing said opening, a filler of dielectric material in the sheath rearward of the plug, a resistance wire within and extending longitudinally of the sheath and supported by said filler, said plug having a pair of circumferentially spaced axially extending and radially outwardly opening grooves, a pair of elongate thermocouple wires supported by the filler within the sheath and having front end portions tightly engaged in and between in said opening and grooves, and an annular weld about the foremost line of contact between said sheath and plug and across the forward ends of said grooves.
摘要:
A thermocouple probe for the indication of temperature over a wide range of values has a hot junction which can readily be displaced. The thermocouple comprises a tube which is suspended from a stationary pressure chamber but electrically insulated therefrom and which contains in the lower portion thereof a liquid having good electrical conductivity and supplied from a reservoir, two electrically conductive wires formed of different metals and connected at the upper ends thereof to a voltmeter whilst the lower ends are immersed in said liquid, and pneumatic means for displacing the level of the free surface of the liquid within the tube, said tube being formed of material which is compatible with the liquid.