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条形码又称条码,最早出现在20世纪40年代,但得到实际应用和发展还是在20世纪70年代左右。现在世界上的各个国家和地区都已普遍使用条码技术,在当今的自动识别技术中占有重要的地位。而且它正在快速的向世界各地推广,其应用领域越来越广泛,并逐步渗透到许多技术领域。条码的应用有以下特点:1.可靠准确。有资料可查键盘输入平均每300个字符一个错误,而条码输入平均每15000个字符一个错误。如果加上校验位出错率是千万分之一。2.数据输入速度快。键盘输入,一个每分钟打90个字的打字员,1.6秒可输入12个字符或字符串,而使用条码,做同样的工作只需0.3秒,速度提高了5倍。3.经济便宜。4.灵活、实用。5.自由度大。条码通常只在一维方向上表达信息,而
Bar code, also known as bar code, first appeared in the 1940s, but practical application and development were still around in the 1970s. Bar code technology is now commonly used in all countries and regions in the world and occupies an important position in today’s automatic identification technology. And it is rapidly being marketed around the world and used in a growing number of applications and gradually penetrating into many areas of technology. Bar code applications have the following characteristics: 1. Reliable and accurate. There is information to check the keyboard input an average of every 300 characters a mistake, and bar code input an average of every 15,000 characters a mistake. If plus check bit error rate is one ten millionth. 2 data input speed. Keyboard input, a typist typing 90 characters per minute, can enter 12 characters or strings in 1.6 seconds, while using the barcode, it takes only 0.3 seconds to do the same job and 5 times the speed. 3. Cheap. 4 flexible and practical. 5 degrees of freedom. Bar codes usually only convey information in a one-dimensional direction, and