Apparatus and method for detecting defect of press panel
First Claim
1. An apparatus for detecting a defect of a press panel, the apparatus comprising:
- an acoustic emission sensor unit configured to detect at least one elastic wave signal emitted from the press panel as a detection target during press work;
a period measurer configured to measure a period as a section in which there are consecutive signals with a greater voltage than a threshold voltage among the at least one detected signals; and
a defect existence determination unit configured to determine that a defect is generated in the press panel when the measured period is greater than a first reference value and to determine that the press panel is in a normal state when the measured period is smaller than a second reference value which is smaller than the first reference value.
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0 Petitions
Accused Products
Abstract
An apparatus for detecting a defect of a press panel includes: an acoustic emission sensor unit configured to detect at least one elastic wave signal emitted from the press panel as a detection target during press work, a period measurer configured to measure a period as a section in which there are consecutive signals with a greater voltage than a threshold voltage among the at least one detected signals, and a defect existence determination unit configured to determine that a defect is generated in the press panel when the measured period is greater than a first reference value, and to determine that the press panel is in a normal state when the measured period is smaller than a second reference value which is smaller than the first reference value.
4 Citations
11 Claims
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1. An apparatus for detecting a defect of a press panel, the apparatus comprising:
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an acoustic emission sensor unit configured to detect at least one elastic wave signal emitted from the press panel as a detection target during press work; a period measurer configured to measure a period as a section in which there are consecutive signals with a greater voltage than a threshold voltage among the at least one detected signals; and a defect existence determination unit configured to determine that a defect is generated in the press panel when the measured period is greater than a first reference value and to determine that the press panel is in a normal state when the measured period is smaller than a second reference value which is smaller than the first reference value. - View Dependent Claims (2, 3, 4, 5)
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6. A method for detecting a defect using a press panel defect detection apparatus, the method comprising:
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detecting at least one elastic wave signal emitted from the press panel as a detection target during press work; measuring a period as a section in which there are consecutive signals with a greater voltage than a threshold voltage among the at least one detected signals; determining that a defect is generated in the press panel when the measured period is greater than a first reference value; and determining that the press panel is in a normal state when the measured period is smaller than a second reference value which is smaller than the first reference value. - View Dependent Claims (7, 8, 9, 10)
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11. A non-transitory computer readable medium containing program instructions for detecting a defect of a press panel, the computer readable medium comprising:
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program instructions that measure a period as a section in which there are consecutive signals with a greater voltage than a threshold voltage among at least one elastic wave signal emitted from the press panel detected as a detection target during press work; program instructions that determine that a defect is generated in the press panel when the measured period is greater than a first reference value; and program instructions that determine that the press panel is in a normal state when the measured period is smaller than a second reference value which is smaller than the first reference value.
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Specification