摘要:
A method and apparatus for accurately determining the interior profile of cylindrical objects such as reformer catalyst tubes is described. The radius of the tube is measured from the axis of the tube for each point of the interior surface by calculating the angle of a reflected light beam and the deviation thereof. A first embodiment reflects an light beam off of the interior surface of the cylinder and measures the angle of the light reflected from the interior of the cylinder. A second embodiment removes rotating parts by using a cone mirror to reflect a ring of light onto the interior of the cylinder. Signal processing means are provided to reduce surplus signals allowing transmission of only useful information.
摘要:
A method for rendering reformer tube inspection data of a reformer tube furnace stack in a colorized 2&3-D graphical format, the method includes analyzing at least a portion of the inspection data, and generating one of a colorized 2D or 3D graphical display depicting inner circumferential diameter of said reformer tube based on the analyzed data, wherein the 2D or 3D graphical display is depicted in spatial orientation to a plurality of reformer tubes comprising the reformer tube furnace.
摘要:
A system and method for displaying inspection data collected from a furnace is disclosed. The system comprises a storage device for storing the inspection data. The system also comprises a computer programmed to partition the inspection data at a plurality of data markers so as to correlate the inspection data to the physical geometry of the furnace. Each of the data markers identifies the location of a physical feature of the furnace (such as a bend, an external raised surface, cross-over piping, a thermal well, a weld, a flange, a schedule change and/or a diameter change). Preferably, the computer is also programmed to generate a display of the partitioned inspection data, wherein the display is a two-dimensional or three-dimensional representation of the tube segments of the furnace. This display may then be used to visually detect problem areas within the furnace. Various exemplary embodiments of the system and associated method are provided.
摘要:
A method of determining the impact resistance of a structure including a crushable material comprises the steps of determining for one or more layers of a finite element of said material during an impact whether said element or layer thereof is to be treated as failing by crushing. If the element or layer is determined to fail by crushing, a load-bearing portion of the structure is defined and the load-bearing portion is treated for the purpose of subsequent calculations as exhibiting an ongoing resistance.
摘要:
An embodiment of the present invention provides a method, comprising communicating and coexisting in a wireless personal area network (WPAN) by a at least one device operating as an advanced device (AD) and at least one device operating as a simple device (SD) by using the at least one AD as a proxy for the at least one SD to control the communication of the at least one SD.
摘要:
Methods are described for detecting genes that encode toxic proteins using maps derived from shotgun libraries by determining the presence of gaps in clone start sites on either side of open reading frames. The method is exemplified by identifying a previously unknown restriction endonuclease gene.
摘要:
A process is provided for determining the distance between two devices by sending ranging packets between them. The local device sends a first ranging packet, which the remote device sends holds for a first hold time before sending a second ranging packet in return. The local device also sends a third ranging packet, which the remote device sends holds for a second hold time before sending a fourth ranging packet in return. If the second hold time is twice the first hold time, then the propagation time for signals between the two devices can be determined solely by time measurements made by the local device. For received signals, these time measurements can be adjusted to provide accurate time estimates for a direct line of sight signal, which corresponds to a shortest transmission distance between the two devices. The propagation time can then be used to determine distance between the devices.
摘要:
A separator for separating liquids in a fluid stream generated by blow-by gases produced in a crankcase of an internal combustion engine wherein the fluid stream includes both gasses and liquids. The separator including an inlet in fluid connection with the engine for receiving the fluid stream and an outlet in fluid connection with the engine to return a gas stream to the engine. The separator further including a fluid path fluidly connecting the inlet to the outlet and a containment vessel in fluid connection with the fluid path. The separator having a fluid stream accelerator in the fluid path and the accelerator accelerating the fluid stream to at least partially separate the gasses from the liquids in the fluid stream. A deflector, which is also in the fluid path between the accelerator and the outlet, changes the direction of the liquid to direct at least part of the liquids in the fluid stream into a containment portion of the vessel and directs the gas stream to the outlet.
摘要:
Insecticidal, acaricidal, nematicidal or molluscicidal compounds of formula (I) wherein Y is a single bond, C═O, C═S or C═(O)q where q is 0, 1 or 2; and R1, R2, R3, R4, R8, R9 and R10 are as defined in the claims or salts or N-oxides thereof, processes for preparing them and compositions containing them.
摘要:
A ultra wideband (UWB) wireless network may include a plurality of UWB wireless devices communicating over a plurality of UWB frequency bins extending over a UWB frequency range. At least one of the UWB wireless devices may be for determining a respective actual signal level associated with each UWB frequency bin, and generating a do-not-use UWB frequency bin list by comparing each actual signal level with at least one interference threshold. Thus, the UWB wireless devices can avoid using frequency bins experiencing excessive interference to thereby provide more reliable UWB communications.