By vantal Two-dimensional bar code is a kind of graphic that records data symbol information on a plane with specific geometric figures distributed according to certain rules. In coding, it skillfully uses the concepts of “0” and “1” bit streams which constitute the internal logic foundation of the computer. Text digital information is represented by several geometric bodies corresponding to binary, which are automatically read by image input equipment or photoelectric scanning equipment to realize automatic information processing. It has some commonalities of bar code technology, that is, each coding system has its own specific character set, each character occupies a certain width, and has certain verification function. At the same time, the two-dimensional code also has the function of automatically identifying different line information and processing the rotation change points of graphics.Through bit by bit efforts, let barcode scanner wireless Our market share is getting higher and higher, and the return on investment is also rising steadily. https://www.edoo-iot.com/
The following is a list of contents:
What technical support does the barcode scanner have?
How to determine the resolution of barcode scanner?
What technical support does the barcode scanner have?
Common barcode scanners usually use the following four technologies: light pen, CCD, laser and image red light.
Light pen is the first hand-held contact barcode scanner and the most economical barcode reader. When in use, the operator needs to contact the light pen with the bar code surface and emit a small light spot through the lens of the light pen. When this light spot passes through the bar code from left to right, the light in the white part will be reflected and the light in the black part will be absorbed. Therefore, a variable voltage is generated inside the light pen for decoding after amplification and shaping.
CCD is an electronic coupling device, which is more suitable for close range and contact scanning. The CCD scanner uses one or more LEDs, and the light emitted can cover the whole bar code. The image of the barcode is transmitted to a line of light, sampled by each photodiode, and each bar or space is distinguished by the adjacent detection results of “black” or “white” to determine the characteristics of the barcode.
Among all kinds of scanners, laser scanner is relatively expensive, but it can provide the highest functional indicators, so it is widely used in various industries. A hand-held laser scanner emits a beam of light through a laser diode and shines on a rotating prism or a swinging mirror. The reflected light shines on the bar code surface through the reading window, and returns to the reader after being reflected or emptied by the bar code. It is collected and focused by a mirror and converted into an electrical signal by a photoelectric converter. The signal will be decoded by the scanner or decoding software on the terminal.
Image red light barcode scanner is a bar code reader that can replace laser gun, and it has excellent code reading performance. The unique image design makes its decoding ability very strong. Generally, the scanner can’t read the bar code, but the red light of the image can still be easily read. Its rich data editing function can make the image red scanner fully cooperate with the user’s existing software.