Inspection method for warpage of rod and inspection apparatus therefor
OwnerHisashi Uetani, Keisuke Tsutsui +1inventors
InventorsHisashi Uetani, Keisuke Tsutsui, Atsushi Miyake
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Abstract
There are provided a method and apparatus capable of conveniently and rapidly inspecting a warpage of a rod. A rod to be inspected is rolled down an inspection bed and light shielded by the downwardly rolling rod is detected by a line sensor as a one-dimensional image signal. A positional fluctuation value of the downwardly rolling rod is obtained from a two-dimensional image signal obtained from the one-dimensional image signal. Based on the positional fluctuation value, the degree of the warpage of the rod is determined. The shielded light signal is detected in the vicinity of one end of the downwardly rolling rod to be inspected.
Claims8
A method of inspecting a warpage of a rod to be inspected, comprising the steps of rolling down the rod to be inspected on an inspection bed, detecting light shielded by the downwardly rolling rod by a line sensor as a one-dimensional image signal, obtaining a positional fluctuation value of the downwardly rolling rod from a two-dimensional image signal obtained from the one-dimensional image signal, and inspecting a warpage of the rod on the basis of the positional fluctuation value.
An apparatus for inspecting a warpage of a rod, comprising an inspection bed for rolling down a rod to be inspected in an inclined direction;
- an illumination device arranged on one side in relation to a slit provided in the inclined direction of the inspection bed;
- a line sensor arranged on another side in relation to the slit;
- an image reading means for reading a one-dimensional image signal detected by the line sensor, as a two-dimensional image signal, in accordance with light emitted from the illumination device and shielded by the downwardly rolling rod to be inspected;
- and a computation means for calculating a positional fluctuation value of the downwardly rolling rod from the two dimensional image signal.
Dependencies are inferred from the claim text.