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Concept Search - What can I type?
For a concept search, you can enter phrases, sentences, or full paragraphs in English. For example, copy and paste the abstract of a patent application or paragraphs from an article.
Concept search eliminates the need for complex Boolean syntax to inform retrieval. Our Semantic Gist engine uses advanced cognitive semantic analysis to extract the meaning of data. This reduces the chances of missing valuable information, that may result from traditional keyword searching.
This invention describes a photoelectric circuit that will detect the presence and position of rapidly moving objects within a defined area by means of an optical non-contact method.
English (United States)
This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately
98% of the total text.
Page 1 of 2
Remote Sensing Lateral Position Indicator
This invention describes a photoelectric circuit that will detect the presence
and position of rapidly moving objects within a defined area by means of an
optical non-contact method.
In the figure, there is shown three narrow beam light sources 10, 11 and 12,
and their corresponding detectors 13, 14 and 15, which are positioned with
respect to the light sources so that the three beams emitted from the sources
form a Z across a defined area. An object traveling along the X-Y path from X to
Y approaches the first light beam between source 10 and detector 13. When the
leading edge of the object interrupts the beam, a first electronic count will be
started. As the object continues to move along the X-Y path, the diagonal light
beam between source 11 and detector 14 is interrupted and a second counter is
started while the first counter is stopped. Thus, time T1, indicated in the figure, is
measured. As the object continues on the path, it interrupts the last beam
between source 12 and detector 15, causing the second counter to be stopped,
thus the time T2 is measured. In this way, two time intervals T1 and T2 are
measured. Assuming constant velocity through the light beam pattern, the ratio
of T1 to T2 yields a true position indication of the object relative to its position
between the two side boundaries. The sum of t(1) and t(2) yields the velocity of
the object between the light beams.