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Barcode
card
Barcode
technology is the technology that develops on
the basis of the technologies of computer, information,
printing, and discerning data. The fruit, honey,
fruit cases and honey can which we bought from
supermarket must be encoded, no matter the barcode
is marked in supermarket or marked on the trade
mark by the producers.
Why
do we use the barcode?
There
are some advantages of barcode.
1.
Accuracy and reliability.
According
to some researches, when using keyboard to input
information, there is one mistake in 300 words
on average; when using barcode, there is one mistake
in 15,000 words on average. If we add rectificative
system, the chance of mistaking almost equals
to zero.
2.
The fast speed of input.
A
typist who can type 90 words in one minute can
input 12 characters or strings in 1.6 second through
keyboard. But when using barcode to do the same
job, typist just need 0.3 second. The speed is
5 times faster.
3.
Low price.
Compared with other automatic distinguishing
technologies, the price for spreading
and applying barcode is low.
4.
Easy and practical.
As
a method to distinguish, barcode symbol can be
used as one unit; it also can be used as automatic
distinguishing system when composed with other
equipments. At the same time, it can be achieved
when input by hand.
5.
Free to achieve.
It
has more variant changes for the position of the
label on barcode and the distinguishing equipment
than OCR. The barcode always conveys information
in one dimension, and the information in a barcode
is the same and can be connected. Then, if there
are some wanes, information also can be input.
1.
Simple equipment.
The
construction of the distinguishing equipment in
barcode symbol is simple, can be easily operated.
There is no need for professional training.
2.
Easy to produce.
The barcode can
be printed, so it also known as “printable language
of computer”. The label of barcode can easily
be produced. There is no special demand for the
equipment and material in printing.
The basic principles
of the barcode.
一
. Barcode
Some people think
that barcode is just the freely arrangement with
different width between lines and blanks. Certainly,
it’s not right. The simple arrangement between
lines and blanks shows the function of the barcode.
The development of the barcode hints the hard
work of the designers. Like all the interfaces
and automatic data collective system, those functions
are not allowed to show up in front of clients,
but it has to be understood by designers.
There is one
thing we need to claim that all the barcode are
designed for special environment and needs. For
example, the demands for barcode in one big packing
box are different from the barcode in small package
or retail goods.
二
. The printing and sticking ways of barcode.
We take
the EAN code as an example, EAN code is designed
especially for the high quality printing, it will
be perfect when using in the package of merchandise.
If we choose to print of low grade, then maybe
another barcode will be more suitable, like the
combination between a short barcode and computer
which has the function of checking in the data
base.
Professional
producing companies of barcode present many kinds
of software and hardware that is suitable for
printing barcode in market. They think of every
element of barcode, the types of barcode’s tag,
the size and the price. To stick the barcode’s
tag on the object is another important element,
because it will be useless if we put the barcode
on wrong object.
The element of
scanning, including the type of the object (size,
weight and so on)、 the size and position of the
tag、 the action between tag and scan machine,
and the speed of scanning is important.
We need to know the cost price clearly when sticking
the tag on one object. The retail store is a good
example to explain the possibilities of gathering
the data information in low price and in certain
period when using the barcode tag on the merchandise.
The principle
of education.
The basic knowledge
of barcode’s technology should be taught, even
if the depth and the range of the knowledge can
be changed according to students and courses.
We have to stress that each part of the knowledge
should be taught through practice, not just discussing
it as one single part.
The education
of the barcode should follow the points below:
Optical scanning
The principle
of illuminant reflects from surface is suitable
for all barcode’s system. To know the different
surface and different illuminant reflects differently
affects success and failure of applying.
The design of
barcode
There
is a wide range of barcode when choosing it, from
easy but effective 25code to EAN13code, then to
overlapped code. There is difference between the
function of the barcode and applying range. (For
example, the permutation of many barcode’s symbol
has limitation, but other barcode includes the
function of arranging letters.) |
