Déantar an cód QR a scanadh gach lá. An bhfuil a phrionsabal teicniúil ar eolas agat? Déantar an cód QR a scanadh gach lá. An bhfuil a phrionsabal teicniúil ar eolas agat?

Déantar an cód QR a scanadh gach lá. An bhfuil a phrionsabal teicniúil ar eolas agat? Déantar an cód QR a scanadh gach lá. An bhfuil a phrionsabal teicniúil ar eolas agat? Ní mór duit an cód QR a scanadh agus tú ag logáil isteach, agus tú ag íoc as rudaí, agus ag síniú isteach le haghaidh cruinnithe. Cad é an prionsabal atá taobh thiar de theicneolaíocht cód QR den sórt sin a úsáidtear go forleathan? Déanfaidh an páipéar seo anailís ar na prionsabail theicniúla atá taobh thiar de chód QR bunaithe ar a fhorbairt agus ar chásanna iarratais tipiciúil. teicneolaíocht cód, a ligean ar ghlacadh le breathnú gairid ar conas a d'fhorbair sé. Chomh luath le 1948, bhí Bernard salvo ina mhac léinn iarchéime in Institiúid Teicneolaíochta Gáis Philadelphia. De sheans, d'fhoghlaim sé go raibh úinéir ollmhargadh áitiúil ag iarraidh ar an déan cuidiú le gléas a dhearadh a d'fhéadfadh praghsanna tráchtearraí a scanadh chun éifeachtúlacht díolacháin tráchtearraí san ollmhargadh a fheabhsú. Toisc go gcaithfidh an t-airgeadóir san ollmhargadh dul isteach sa struchtúr de láimh gach uair nuair a bhíonn na hearraí á socrú, tá éifeachtacht socraíochta an airgeadóir an-íseal nuair a shroicheann an sreabhadh paisinéirí ragobair. Ach cheap an Déan gur rud an-deacair é a dhéanamh. Tar éis triail a bhaint as scéim luminescence graifít ionradaíochta ultraivialait, córas spot dall agus córas siombailí líne ponc, níor úsáideadh go forleathan iad mar gheall ar na teorainneacha teicniúla ag an am sin. suas an smaoineamh órga nár bhain feidhm tráchtála amach sna blianta sin. Ag an am seo, bhí sé ina innealtóir ag IBM cheana féin. Le linn a fhanachta sa chuideachta, léirigh sé i gcónaí a chuid smaointe maidir le cur i bhfeidhm teicniúil an chóid barra, agus chuir a chomhghleacaithe béim i gcónaí ar luach tráchtála an chóid barra. Ag an am céanna, cuireadh léasair agus ríomhairí i bhfeidhm, agus tá bunús teicniúil cur i bhfeidhm na gcód barra críochnaithe. Thart ar 1969, ghlac coillearnach páirt i bhfoireann tionscadail taighde scanóir agus lipéad ollmhargadh a d’infheistigh IBM, a bhí i gceannas ar George laurel. Tar éis roinnt blianta de thaighde dian, sheol IBM barrachód inaitheanta ar deireadh. Ba é an chéad mhír a scanadh ná 10 bpacáiste de ghuma blaistithe torthaí súiteach Wrigley, atá bailithe anois ag Músaem Staire Mheiriceá. Ansin, úsáidtear barrachód go forleathan i dtráchtearraí, leabhair, córais phoist agus córais eile, rud a fheabhsaíonn éifeachtacht oibríocht ghnó go mór.

Introduction

QR code has become an indispensable part of our daily life. You need to scan the QR code when logging in, when paying for things, and when signing in for meetings. What is the principle behind such a widely used QR code technology? This paper will analyze the technical principles behind QR code based on its development and typical application scenarios.

A brief history of QR code development

2.1 the birth of bar code

Before we understand the principle of two-dimensional code technology, let's take a brief look at how it developed. As early as 1948, Bernard salvo was a graduate student at the Philadelphia Institute of gas technology. By chance, he learned that the owner of a local supermarket wanted the dean to help design a device that could scan commodity prices to improve the efficiency of commodity sales in the supermarket. Because the cashier in the supermarket needs to enter the structure manually every time when settling the goods, the cashier's settlement efficiency is very low when the overtime passenger flow reaches. But the Dean thought it was a very difficult thing to do.

However, Bernard selver and his friend Joseph woodland thought it was a huge business opportunity and decided to design a commercially viable product. After trying the scheme of ultraviolet irradiation graphite luminescence, blind spot system and dot line symbol system, they were not widely used due to the technical limitations at that time.

In the blink of an eye, in the 1960s, woodland never gave up the golden idea that did not realize commercial application in those years. At this time, he was already an engineer of IBM. During his stay in the company, he constantly expounded his ideas on the technical implementation of bar code, and his colleagues constantly emphasized the commercial value of bar code. At the same time, lasers and computers have been applied, and the technical foundation of bar code implementation has been completed. About 1969, woodland participated in the supermarket scanner and label research project team invested by IBM, which was headed by George laurel. After several years of painstaking research, IBM finally launched a recognizable bar code.

On June 26th, 1974, the world's first barcode scanner was installed in marsh supermarket in Troy, Ohio. The first item scanned was 10 packs of Wrigley's juicy fruit flavored gum, which has now been collected by the American Museum of history. Then, barcode is widely used in commodities, books, postal and other systems, which greatly improves the efficiency of business operation.