摘要:
The method reduces the nitrogen oxide concentration in the exhaust of an internal combustion engine. A noticeable reduction in the NO.sub.x emission of a diesel motor can be achieved by applying the Selective Catalytic Reduction (SCR) method. In this method, ammonia is injected into a catalyzer through which the exhaust gas flows, this ammonia reacting with nitrogen monoxide or, respectively, nitrogen dioxide to form nitrogen and water. Since the exhaust gas should contain neither nitrogen monoxide nor excess ammonia, suitable methods are required for regulating the metering of NH.sub.3. For controlling the amount of urea added to the exhaust gas as a reduction agent, the NO and NH.sub.3 concentration is measured using a detector located in the exhaust systems following the SCR catalyzer. The detector contains a vanadate layer manufactured on the basis of a specific sputtering method as a sensitive element. The electrical resistance thereof is highest when the conversion of nitrogen monoxide to form nitrogen and water occurs stoichiometrically.
摘要:
A method for operating a device for gasifying carbon-containing fuels and a corresponding device are provided. The gasification of the carbon-containing fuels provokes a flame. The emission spectrum of the flame is registered and evaluated continuously in real time by a multi-variant method and an evaluation model that is previously recorded.
摘要:
Sensor for determining a chemical element and method for controlling such a sensor. The invention relates to a sensor (1) for determining a chemical element or a chemical compound (CO2) in a supplied gaseous medium with a reaction area (9), on and/or in which the element or the compound brings about a chemical reaction that changes a characteristic parameter (for example the work function), Version 3* of the reaction area (9), a sensor element (5) that is placed in the sensor (1) to detect the change in the characteristic parameter, a signal output (11) at which an output signal (UPS) corresponding to the chemical reaction detected by the sensor element can be detected as the measured variable, and a reaction control device (SC, 12) with an electrode system (10, 13) for applying a control voltage to affect a reaction in the reaction area (9). To be able to use the sensor more variably and more reliably, it is proposed to produce a surface topology of such dimensions that during operation, a moisture film (16) of deposited ambient moisture continuously coats the surface area of both the electrode system and the reaction area. Possibilities in particular are correction of long-term changes from the influence of surrounding gases, checking probe functionality, and selective adjustment to measure given chemical variables.
摘要:
A cage telemetry system includes a plurality of cage groups, first and second radio transponders, and a hub element. The plurality of cage groups are located within a space. Each cage group includes a plurality of animal cages, each cage associated with at least one telemetry module. The first radio transponder is operable to effect wireless communications with each telemetry module of a first cage group. The second radio transponder is operable to effect wireless communications with each telemetry module of a second cage group. The hub element is operable to communicate with the first radio transponder and the second radio transponder, and is further operably connected to a computer network.
摘要:
A method for identifying people involves breathing respired air into a collector unit, trapping condensate from the respired air in the collector unit, introduction of the condensate by a same introduction to a DNA sensor unit, analysis of the condensate after a cell disruption, comparison of the result the data from a databank and output of the comparison result with analysis of the identity of a person.
摘要:
A control/regulation unit and a sensor device in an air-conditioning device enable detecting presence of an analyte in room air to infer the quality of the room air. A light source emits light into the room on a light path that is reflected to a light-sensitive detector. The air-conditioning device is controlled/regulated as a function of an output of the detector. If the analyte is situated on the light path, the light is scattered and/or absorbed such that the detector detects a smaller quantity of light, on the basis of which it is possible to infer the presence of the analyte. The light source can be pivoted to set various light paths through the room to determine where the analyte is situated in the room based on the output of the detector for each light path. The air-conditioning device can controlled to selectively influence the atmospheric environment locally.
摘要:
An environmentally responsive building includes an array of window and/or building panels that are configured to generate an output product from environmental inputs. The panels may include photocatalytic elements capable of generating output product(s) from solar energy and atmospheric gas(es), and photovoltaic elements capable of generating electricity from solar energy. The building includes a transport network that provides inputs to the window/building panels and transports output product(s) to a storage system. A conversion system may be provided to convert the output product(s) to an input usable by the building. A supervisory controller monitors and controls the operation of the window/building panels as a function of the environment, and of the operation and capacity of the environmentally responsive components, including the panels, transport network, storage system and conversion system.
摘要:
A biosensor for detecting an antigen using an antigen/antibody coupling includes: a silicon substrate, at least one interdigital electrode pair structure that is located on the silicon substrate, the electrode pair being interspaced at a maximum distance of 1.0 μm; a counter-electrode on the silicon substrate; a reference electrode; a first layer of protein, covering at least the interdigital electrode structure; a selective second protein layer applied to the first layer and containing a capture antibody selected specifically with respect to the antigen of interest and to which the antigen can be coupled. A sensor signal can be read on the interdigital electrode structure, if the antigen is coupled to the capture antibody by way of a sample to be analyzed that comes into contact with the biosensor and a redox reactive molecule is enzymatically released on the sensor surface by an enzyme-marked detection antibody likewise coupled to the antigen.
摘要:
A fuel system is disclosed for a floating unit, including a fuel passage extending from a filler neck to a motor, a measuring unit disposed in the fuel passage through which at least part of the fuel flowing along the fuel passage flows, for measuring a sulfur content of the fuel through the measuring unit.
摘要:
An FET-based gas sensor includes at least one field-effect transistor and at least one gas-sensitive layer and a reference layer. Any changes in work function occurring when materials of the layers are exposed to a gas are used to trigger the field-effect structures. The gas-sensitive layer includes a metal oxide having an oxidation catalyst on its surface and accessible to the measured gas.