Abstract:
An engineered lighting system for use in an inspection system is comprised of an array of light emitting diodes. A specimen is brought into the viewing area, and a current pulse is provided to the diodes of the array to selectively flash all or a portion of the diodes of the array. Reflected light from the specimen is sensed and a digitized image is generated therefrom. An illumination level of the digitized image is adjustable, in whole or in part, by varying the effective lighting intensity of one or more of the diodes of the array during a flash period. The digitized image of the specimen is compared to data indicative of acceptability of the specimen, and acceptance or rejection of the specimen is decided on a basis of a comparison therebetween.
Abstract:
The invention is an automated solder joint inspection system for determining the quality of a specular soldered joint through examination of the shape of the joint surface using a series of point light sources and the associated highlight reflections from the joint surface. The light from the point light sources, which is directed toward the solder joint, is reflected in a pattern from the solder joint to an array of light responsive transducers, such as a camera, at a fixed location. Utilizing the intensity values from the light responsive transducer array, a binary grid map is generated for the reflections from each point light source. Using known surface features of solder joints along with curve fitting techniques, a series of grid maps may be mathematically interpreted to reconstruct the solder joint surface. A rule-based system, through comparison with acceptable solder joint surface features, evaluates and classifies the joint for an acceptability determination.
Abstract:
A system for line scan processing video signals from a linear array of photoelectric cells so that the signals for individual cells and individual scan sweep are selectively utilized according to sweep number and cell numbers. A signal window is defined for each sweep individually at a predetermined cell for a beginning of the effective video signal and is terminated at another predetermined cell for the end of the effective video signal so that the video signal is processed for only that portion of each sweep covering the area of interest. In optical inspection of an article the significance of changes in the ratio of light intensity at particular cells from the background light intensity is adjusted by sweep and cell number so that such changes which are predictable in certain locations on the article must exceed threshold levels which are different than for other locations. This enables compensation in the inspection of a number of similar articles for regularly occurring marks on the areas of inspection for those articles.
Abstract:
Inspection of workpieces traveling along a production line includes on-line inspection of the workpieces at an upstream inspection station to detect possible flaws without interrupting the progression of workpieces along the production line. Possible flaws in the inspected workpieces are imaged, and images of possible flaws are stored in a memory in a way that associates a stored image with the workpiece containing the possible flaw. Off-line, a stored image is retrieved from the memory before the workpiece with which the image is associated reaches a downstream sorting station. The retrieved image is displayed on a monitor for verifying, by visual inspection, whether the possible flaw in the workpiece with which the retrieved image is associated, is valid. Workpieces are diverted at the downstream sorting station in response to vertification of flaws.
Abstract:
A side surface inspection device is provided for a cylindrical battery having a side surface defining first to fourth areas. The side surface inspection device includes a first light to emit light toward the side surface of the cylindrical battery; a plurality of mirrors having a first to fourth mirrors that each reflect light emitted from the first light to be incident on each of the first to fourth areas, respectively, of the cylindrical battery, and are configured to reflect light reflected by each of the first to fourth areas, respectively, of the cylindrical battery; and a camera to receive the light reflected by each of the plurality of mirrors and configured to form an image including images of the first to fourth areas of the cylindrical battery.
Abstract:
A two-phase liquid immersion cooling system is described in which heat generating computer components cause a dielectric fluid cool the computer components. Advantageously, a pH indicator is employed to monitor the acidity of the dielectric fluid via, for example, a color change.
Abstract:
A leather inspection apparatus is provided for detecting inconsistencies on both upper and lower surfaces of a hide. It includes a first camera assembly movably coupled to a support frame and capable of movement along the upper surface of the hide and a second camera assembly movably coupled to the support frame and capable of movement along the lower surface of the hide. A computing device is coupled to the first camera assembly and the second camera assembly, such that the first camera assembly detects the locations of inconsistencies in the upper surface of the hide and the second camera assembly detects the locations of inconsistencies in the lower surface of the hide. The computing device digitally stores the locations of the inconsistencies of the upper surface of the hide and the locations of the inconsistencies of the lower surface of the hide.
Abstract:
A system for the determination of retroreflectivity values for reflective surfaces disposed along a roadway repeatedly illuminates an area along the roadway that includes at least one reflective surface using a light source. Multiple light intensity values are measured over a field of view which includes at least a portion of the area illuminated by the light source. A computer processing system is used to identifying a portion of the light intensity values associated with a reflective surface and analyze the portion of the light intensity values to determine at least one retroreflectivity value for that reflective surface.
Abstract:
A system for classifying different types of sheeting materials of road signs depicted in a videostream compares estimated retroreflectivity values against known minimum retroreflectivity values for each of a plurality of colors. Once a road sign has been identified in the videostream, the frames associated with that road sign are analyzed to determine each of a plurality of colors present on the road sign. An estimated retroreflectivity for each of the plurality of colors present on the road sign is then determined. By comparing the estimated retroreflectivity for each of the plurality of colors against known minimum retroreflectivity values for the corresponding color for different types of sheeting materials, an accurate determination of the classification of the sheeting material of the road sign is established. Preferably, certain conditions of gross failure of the sheeting material are filtered out before classification of the sheeting material is determined.
Abstract:
Some embodiments of the invention include a method for capturing and analyzing monitoring data of a measuring system. In some embodiments, the measuring system may include one or more sensors and being adapted for a measuring operation of a series of identical objects the measuring operation comprising a multitude of measuring sequences, each measuring sequence comprising the measuring of values of features of an object of the series, the method comprising a multitude of monitoring operations, wherein each monitoring operation comprises capturing monitoring data during a measuring sequence, the monitoring data of each measuring sequence including at least one image comprising the measuring system and/or a measurement environment, characterized by selecting a subset of measuring sequences from the multitude of measuring sequences; and visualizing an image sequence comprising the images of the monitoring data of the measuring sequences of the subset.