摘要:
A humidity sensor of a sensing unit in a radiosonde of an aerological observation system has a dual cap that surrounds the humidity sensor. The dual cap includes an outer cap having a first ventilation hole formed on top thereof, a first air circulation door formed on the side periphery thereof to pass air therethrough, and a first wall formed on the side periphery thereof to close the flow of air. An inner cap is located inside the outer cap in such a manner as to be fixed to the outer cap and has a second air circulation door formed on the side periphery thereof to pass air therethrough. The second air circulation door faces the first wall of the outer cap.
摘要:
An irreversible humidity exposure dose indicator device, including a housing sealed at a first end thereof and adapted at a second end thereof to admit ambient gas ingress into an interior volume containing chromogenic material. The chromogenic material in contact with water irreversibly absorbs such water to produce a change whose extent is correlative of cumulative exposure of the device to humidity. The device may be configured as an indicator card including an intermediate permeable membrane coated on a first side thereof with a layer of a deliquescent solid and being in contact on a second side thereof with a layer containing a reactive indicator, with a water-permeable layer adjacent to the layer containing the deliquescent coating, enclosed within a water-impermeable transparent enclosure. The device can include an opening to the permeable layer that is shielded by a removable member that is removed to initiate the dosimetric process, and permit water vapor to diffuse through the opening and liquefy the deliquescent material, so that the liquid permeates through the membrane and a visible indication of the location of the wet front is seen as the water contacts the chromogenic material. A scale can be printed on the exterior of the enclosure to permit a viewer to see the progress of the indication, e, g. of a color front.
摘要:
A sensor means is proposed to determine an interior humidity and/or an interior volume delimited by a wall, in particular, of a vehicle passenger compartment 3, and a fogging up tendency of an inner surface of the wall, in particular, of a window 5 of the vehicle passenger compartment 3, with a dew point sensor 10 having a humidity sensor element 1 and a temperature sensor 2, wherein the humidity sensor element 1 and the temperature sensor 2 are thermally coupled, and a surface temperature sensor 4, wherein the dew point sensor 10 is designed to measure the air humidity and the room temperature of the interior volume and the surface temperature sensor 4 is designed to measure the temperature of the inner surface.
摘要:
An apparatus for accurately measuring the water content of a moist gas containing less than 50 parts per million (ppm) of water comprises an isothermal heat-sink (14), a radiator (20), a Peltier heater-cooler (24) thermally arranged between the isothermal heat-sink (14) and the radiator (20). The heater-cooler (24) is transferring heat from the isothermal heat-sink (14) to the radiator (20) and vice versa. A phosphoric acid moisture cell (32) is in thermal contact with the isothermal heat-sink (14). Upon passing the moist gas through the cell (32) the amount of moisture in the moist gas is measured as variation of electrical current throughout the cell.
摘要:
A moisture sensitive device includes a polymer capacitive moisture sensitive element and a heater. The polymer capacitive moisture sensitive element is formed by sequentially stacking a lower electrode, a moisture sensitive film made of an organic polymer resin material, and an upper electrode on an insulating substrate. The heater serves to heat the moisture sensitive film to restore the original characteristics thereof.
摘要:
The multi-parametric environmental diagnostics and monitoring sensor node (10) provides monitoring and diagnostics of a variety of different ambient environmental factors and is powered by multiple sources of renewable energy. The multi-parametric environmental diagnostics and monitoring sensor node (10) includes a base (38) and a plurality of environmental condition sensors (36a, 36b, 36c, 36d, 36e, 36f) mounted thereon. A controller (47) is also mounted on the base (38), the plurality of environmental condition sensors (36a, 36b, 36c, 36d, 36e, 36f) being in communication therewith. An external photovoltaic cell (18) is mounted to the base and an internal photovoltaic cell (34) is mounted in an opposed orientation on a cover (32). The external photovoltaic cell (18) and the internal photovoltaic cell (34) charge a power storage module (52), which powers the plurality of environmental condition sensors (36a, 36b, 36c, 36d, 36e, 36f) and the controller (47).
摘要:
The invention relates to a sensor unit for detecting the wetting of a window. Signals from the condensation sensor are used to control an air conditioning, heating, and/or ventilation unit. The signals of the rain sensor, on the contrary, are used to control a windshield wiper or washing unit for vehicles. A sensor unit, which comprises two sensors, is placed on the interior of the window. In a preferred variant, both are coupled to a common switchable evaluation unit, so that through mutual evaluation of the two sensors or their signals, both incipient condensation on the interior of a vehicle window and the wetting of the exterior, e.g., by rain, is detected. In an improvement of the invention, both sensors are integrated into a sensor module.
摘要:
An image processing system which detects foreign matter on window of a vehicle with high reliability. The system includes an image processor, a first lamp, and a second lamp and when to turn on the first and second lamps is controlled by the image processor. Light from the first lamp passes through the glass. If there are raindrops on the outer surface of the glass, light is reflected by raindrops and light from the second lamp is reflected by a surface of the glass and such reflected light goes through a lens and an optical filter with prescribed optical characteristics to an imaging device.
摘要:
A sensor including a micro-bridge heater which is located above a depression in the surface of a substrate. The heater includes a first insulating film on the substrate, a conductive film on the first insulating film, and a second insulating film on the conductive film. The first and second insulating films are made of the same material, preferably tantalum oxide (Ta.sub.2 O.sub.5) and are the same thickness. A foundation film is not employed as an adhesive between the first insulating film and the conductive film due to the strong adherence between the first insulating film and the conductive film which is preferably made of platinum or a platinum alloy. Because the first and second insulating films are made of the same material and have the same thicknesses, the insulating films have similar rates of thermal expansion and the expansion or contraction of the insulating films offset each other, thus reducing the thermal stress imposed on the conductive film.
摘要翻译:一种传感器,其包括位于基板表面的凹部上方的微型桥式加热器。 加热器包括在基板上的第一绝缘膜,第一绝缘膜上的导电膜和导电膜上的第二绝缘膜。 第一和第二绝缘膜由相同的材料制成,优选为氧化钽(Ta 2 O 5),并且具有相同的厚度。 由于第一绝缘膜和优选由铂或铂合金制成的导电膜之间的强粘附,基膜不用作第一绝缘膜和导电膜之间的粘合剂。 由于第一绝缘膜和第二绝缘膜由相同的材料制成并且具有相同的厚度,所以绝缘膜具有相似的热膨胀率和绝缘膜的膨胀或收缩率彼此抵消,从而降低施加在导电上的热应力 电影。
摘要:
An impedance detector, in particular for radiosonde operation. The detector comprises a substrate (10 . . . 10E) made of an insulating material, onto which substrate the electrode and contact patterns (11, 11a, 13) necessary for the formation and connecting of the detector impedance have been applied. Between the detector impedance electrodes (11,13), there is an active film (12), whose impedance values are a function of the physical quantity measured by means of the detector. The substrate of the detector is an oblong core filament (10;10B;10C;10D;10E) of an insulating material, onto and around which core filament both electrodes (11,13) and such active insulating film (12) have been applied. Also, a novel process is described for the manufacture of such impedance detector.