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Operation
of industrial x ray inspection
Specified and used correctly a
good x ray product inspection system can typically reduce
customer complaints by up to 70%, an inferior system programmed
incorrectly can result in headaches and trauma for all
concerned. When evaluating x ray inspection suitability you must
be aware of the limitations of the system and your products, if
you set too fine a sensitivity the false reject rate (FRR) can
render the system totally unsuitable. When you evaluate the
suitability it is important that you make the supplier give you
guaranteed results, if a full product evaluation is not carried
out then you should tread carefully.
The question you should ask
yourselves is "do you want just any industrial x ray inspection system or a
genuine improvement in quality and subsequent reduction in customer
complaints?" if you want the former then the choice of
supplier is simple, if you are serious about quality then so
should your supplier be
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INDUSTRIAL X RAY INSPECTION
High voltage applied to the x ray tube this sets the
penetrating power.
The tube current sets the flux, number of photons.
The tube is turned on and
off like a light bulb, there is no radioactive material ever
present.
The x rays are arranged
into a fan shape which passes through the product, losing
energy as it does so and reaches an x ray sensitive diode
array.
A "3D" image of the product
is built up, the "third dimension" being x ray absorbtion,
or how much of the x ray energy is absorbed by the product..
The processor maps this
image in greyscale, from white which is 0 to black at over
65,000. Some commercial systems use less than 1000 layers of
greyscale which reduces definition. Using software
image processing the image is analysed a good/bad decision
is made. The x ray systems we supply uses up to 10
"operators" to find contaminants and identify features such
as weight, shape, size, thickness etc. |
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WHAT CAN YOU FIND?
Stone, metal, hard plastics
inc. rubber, glass, calcified bone, wire, Teflon
WHAT CAN YOU NOT FIND?
Hair, nails, string, plastic
gloves, polythene, skin
WHAT CAN YOU IDENTIFY
Size, weight, shape, length,
fill level, count, presence, thickness, density.
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We have many
years experience of practical inspection systems experience.
Should you have any specific questions relating to product
inspection systems please do not hesitate to contact us by your
most convenient medium. |
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TEL: 01274 726262
FAX: 01274 726464 |
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