Abstract:
An apparatus (10) for analyzing lubricant oils and functional fluids includes an optical emission spectrometer (OES) (26) having a substantially continuously valued wavelength versus intensity output (140). The OES (26) analyzes light captured from a spark emission stand (58) through which the fluid sample is flowed. An expert system (160-172) operates according to a set of Rules, and generates diagnostic text (174) for an operator based on the information about the fluid sample provided by the OES (26) and other measurement devices. The apparatus (10) is reduce in size, weight and cost.
Abstract:
An IR camera comprises an IR Focal Plane Array having a number of detector elements as sensor devices, an optical system focusing an object onto the Focal Plane Array, and a signal processing system connected to the Focal Plane Array. The camera also has a modular structure comprising a camera housing provided with the Focal Plane Array and the signal processing system, an absorbent/emitting shielding device connected to the camera housing, and an optical focusing system removably mounted to the shielding device.
Abstract:
The present invention provides a laser-based method and apparatus that uses absorption spectroscopy to detect the mole fraction of CO2 in a high temperature gas stream. In a preferred embodiment, a distributed feedback based diode laser sensor operating at a wavelength near 1996.89 nm (5007.787 cmnull1) interrogates the R(50) transition of the null1null2null2nullnull3 CO2 absorption band in the near infrared. This transition is specifically chosen based on its superior linestrength and substantial isolation from interfering absorption by high-temperature H2O, CO, NH3, N2O, NO, and other species commonly present in combustion or other high-temperature gas flows.
Abstract:
A detection device for detecting persons or objects and the direction of movement thereof comprising a radiation sensor arrangement for detecting electromagnetic radiation of the wavelength of visible and/or invisible light which is reflected or emitted by a person or an object, and an evaluation unit which is connected to the sensor arrangement, wherein the evaluation unit is adapted to form a variation signal which corresponds to the time variation of the radiation detected by the radiation sensor arrangement and is connected to a store which is adapted to store at least a portion of the variation signal and a characteristic parameter associated with the variation signal.
Abstract:
A method and apparatus for maintaining a viewing window of a detector substantially clean includes enclosing the detector within a housing, and moving a target surface relative to the viewing window to create an airflow adjacent the viewing window. The housing can include an aperture through which the viewing window of the sensor views the target surface. Motion of the target surface creates an airflow velocity adjacent the viewing window for maintaining the viewing window substantially clean. To increase the accuracy of the detector, a high emissivity area is provided on an outside surface of the housing which faces the target surface.
Abstract:
A method and system are disclosed for imaging a planetary surface region of interest (ROI). In a primary application, a plurality of space vehicles having antennas mounted thereupon are utilized to collect thermal radiation emitted from the ROI and generate corresponding thermal emission signals. Such thermal emission signals may be combined to yield one or more simple interferometric fringes. The simple fringes may be employed to yield a pixel image of the ROI. In one aspect, one or more simple interferometric fringes may be utilized to generate one or more compound interferometric fringes for use in formation of the pixel image. One or more compound fringes may be utilized to generate additional levels of compound fringes for use in formation of the pixel image. In another aspect, the space vehicles may be positioned in a nullnear-fieldnull imaging arrangement relative to the ROI and a matched filtering approach may be utilized for extracting amplitude data from the interferometric fringe(s) on a basis for use in pixel image formation.
Abstract:
Infrared radiation receivers (40, 72) of this invention include non-imaging optical concentrators (18, 70) having light exit surfaces (52, 86); a light sensor (46) having a light entrance surface that is separated from the light exit surface by a small air gap (53); and a soft, pliable, light transmissive medium (100, 110) inserted in the gap to reduce the light transmission loss across the gap. The soft, pliable medium is held in place by either a recess (116) in the concentrator or by a surrounding annular ring (104).
Abstract:
The present invention relates to a sample presentation apparatus for use in analyzing equipment for pharmaceutical products, for example solid dosage forms such as a tablet, a pellet or a capsule. The invention further relates to a method for presentation of samples to the analyzing equipment. Samples are sequentially fed through at least one predetermined analyzing position (6) wherein at least one measuring radiation beam irradiates the sample (14) when it is located in the analyzing position characterized in that there is at least one two-piece means (9, 39) for temporarily fixing each sample at said analyzing position (6), the two-piece means comprises a first and a second sample holding part arranged at the analyzing position in which the two-piece means is adapted to move between an open position wherein a sample is provided for analysis, and a closed fixing position wherein a sample is analyzed.
Abstract:
A gas sensor (10) exposed by diffusion to a gas flow and operable to measure the presence of a particular gas component of the gas flow. The sensor (10) comprises a base (20), a diffuser (34), a source (36), a detector (38), and a detection chamber (40). The diffuser (34) is interposed between the gas flow and the detection chamber (40). Thus, rather than directly exposing the source (36), detector (38), and other electronics to the full force of the gas flow, the gas is passed to and from the detection chamber (40) by diffusion. The source (36) radiates energy having a particular characteristic such that the energy is proportionally absorbed by the gas component. The detector (38) measures the presence of any unabsorbed energy and generates an output signal indicative thereof. The detection chamber (40) is coated with a material known to reflect the radiated energy.
Abstract:
In a respiratory air flow measuring monitor, a subassembly for analyzing certain respiratory gases through infrared spectroscopy includes an infrared emitter and an infrared detector, the amount of energy detected by the detector corresponding to the concentration of the gas selected for analysis. The subassembly includes a gas sample chamber that utilizes an elliptical reflecting surface for the infrared light source. The light source and detector are both oriented longitudinally along the axis of the ellipse and the light source and detector are each located at the two focal points of the ellipse in order to optimize the light absorption reading. The gas content analyzer subassembly additionally incorporates various compensatory features, allowing for automatic temperature and pressure compensation. For ease of use and serviceability, the components of the subassembly are contained within a field replaceable housing that includes electronic memory chips for calibrating temperature and pressure constants used in respiratory measurements.