WE CLAIM: ! [Claim 1]
A molded resin article inspection apparatus comprising an X-ray emission means for emitting X-ray beams through a plurality of paths, one or more X-ray detection means for detecting X-ray beams that have passed through a molded resin article, and an image processing means,
wherein the image processing means comprises a defect candidate detection means for detecting defect candidates based on two or more images acquired by the X-ray detection means, a height measuring means using a stereo matching method, an image computing means for performing logical multiplication of the image having recorded height position information obtained by the height measuring means and a defect candidate image obtained by the defect candidate detection means, and a selection means for judging the state of the defects candidate from the height position. [Claim 2]
A molded resin article inspection apparatus as set forth in claim 1, wherein the selection means comprises a distance setting means for setting the distance from the X-ray emission means to the molded resin article, an inspection range setting means for setting an inspection range based on the distance and the thickness of the molded resin article, and a delect judgment means for deciding that a defect candidate found in the inspection range is a defect. [Claim 3]
A molded resin article inspection apparatus as set forth in claim 2, wherein the distance setting means comprises a distance input means for iiipulling a target distance from the X-ray emission means to the molded resin article, a distance measuring means for measuring the distance from the X-ray emission means to the molded resin article, and a distance correction means for calculating the difference between the input value entered by the distance input means and the measured value taken by the distance measuring means and making a correction based thereon so that the distance becomes equal to the input value. [Claim 4]
A molded resin article inspection apparatus as set forth in any one of claims 1 to 3, wherein the X-ray emission means comprises one or more X-ray emission means and an X-ray emitting position moving means for moving the one or more X-ray emission means so that X-ray beams are emitted from two or more different positions towards the molded resin article. [Claim 5]
A molded resin article inspection apparatus as set forth in any one of claims 1 to 3, wherein the X-ray emission means comprises one or more X-ray emission means and a molded resin article position moving means for moving the molded resin article to two or more positions. [Claim 6]
A molded resin article inspection apparatus as set forth in any one of claims 1 to 5, wherein the resin molded article is a member of a high pressure tank. [Claim 7]
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A production apparatus for molded resin articles having a molded resin article inspection apparatus
as set forth in any one of claims 1 to 6, comprising an inspection means having a molded resin article
inspection apparatus and a selection means for distinguishing molded resin articles judged to be
unacceptable by the inspection means from molded resin articles judged to be acceptable.
[Claim 8]
A production apparatus for high pressure tanks having a molded resin article inspection apparatus
as set forth in any one of claims 1 to 6, comprising an inspection means having a molded resin article
inspection apparatus, a selection means for distinguishing molded resin articles judged to be
unacceptable by the inspection means from molded resin articles judged to be acceptable, and an outer
layer forming means for forming an outer layer for reinforcement on the molded resin articles judged
to be acceptable.
[Claim 9]
A molded resin article produced by using a production apparatus for molded resin articles as set forth
in claim 7.
[Claim 10]
A high pressure tank produced by using a production apparatus for high pressure tanks as set forth
in claim 8.
[Claim 11]
A fuel cell vehicle having a high pressure tank as set forth in claim 10.
[Claim 12]
An inspection method for molded resin articles designed to emit X-ray beams through a plurality of
paths, detect X-ray beams transmitted through a molded resin article at one or more positions, detect
a defect candidate in a detected X-ray image, measure the height by a stereo matching method,
perform logical multiplication of the resulting height information image and the image obtained as a
defect candidate, and judge the state of the defect candidate based on the height position.
[Claim 13]
A molded resin article inspection method as set forth in claim 12, wherein the selection method is
designed to set a distance from the X-ray emitting position to the molded resin article, set an
inspection range based on the distance and the thickness of the molded resin article, and decide that
a defect candidate found in the inspection range is a defect.
[Claim 14]
A molded resin article inspection method as set forth in claim 13, wherein the distance setting method
is designed to input a target distance from the X-ray emitting position to the molded resin article,
measure the distance from the X-ray emitting position to the molded resin article, and calculate the
difference between the input distance value and the measured distance value to make a correction
based thereon so that the distance becomes equal to the input value.
[Claim 15]
A molded resin article inspection method as set forth in any one of claims 12 to 14, wherein
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the method for emitting X-ray beams through a plurality of paths is designed to move the X-ray
emitting position so that X-ray beams are emitted from two or more different positions towards the
molded resin article.
[Claim 16]
A molded resin article inspection apparatus as set forth in any one of claims 12 to 14, wherein the X-
ray emission means is designed to emit X-ray beams from one or more positions and move the molded
resin article to two or more positions.
[Claim 17]
A molded resin article inspection method as set forth in any one of claims 12 to 16, wherein the resin
molded article is a member of a high pressure tank.
[Claim 18]
A production method for molded resin articles having a molded resin article inspection method as set
forth in any one of claims 12 to 17, comprising an inspection step using the molded resin article
inspection method and a selection step for distinguishing molded resin articles judged to be
unacceptable by the inspection means from molded resin articles judged to be acceptable.
[Claim 19]
A production method for high pressure tanks that uses a molded resin article inspection method as
set forth in any one of claims 12 to 17, comprising an inspection step using the molded resin article
inspection method, a selection step for distinguishing molded resin articles judged to be unacceptable
in the inspection step from molded resin articles judged to be acceptable, and an outer layer forming
step for forming an outer layer for reinforcement on the molded resin articles judged to be acceptable.
[Claim 20]
A production method for fuel cell vehicles that uses a molded resin article inspection method as set
forth in any one of claims 12 to 17, comprising an inspection step using the molded resin article
inspection method, a selection step for distinguishing molded resin articles judged to be unacceptable
in the inspection step from molded resin articles judged to be acceptable, an outer layer forming step
for forming an outer layer for reinforcement on the molded resin articles judged to be acceptable in
order to provide a high pressure tank, and an installation step for installing the resulting high
pressure tank on a chassis.
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