What is the barcode scanner
The scanner is a instrument for the commercial POS system.There are two main categories, one is the application of ordinary scanners and commercial scanners.Business is mainly divided into three types: CCD scanner, laser handheld scanner and full -angle laser scanner.
According to the habit, different barcode scanners are also called barcode readers, barcode scanning guns, barcode scanners, barcode scanned guns and barcode scanners.
The barcode scanner uses the principle of photoelectricity to convert barcode information into the input device of computer acceptable information. It is commonly used in libraries, hospitals, bookstores, and supermarkets. As an input method for fast registration or settlement, on the outweight packaging or printing of goodsRead the barcode information directly and enter the online system.
Types of strip scanners
First, handheld barcode scanner.
Handheld scanner is a product formed by technology launched in 1987. It looks like a barcode scanner used by supermarkets to use it in the hand.The vast majority of CIS technology is used with CIS technology, with an optical resolution of 200DPI. There are many types of black and white, gray, and color. Among them, color types are generally 18 -bit color.There are also individual high -end products using CCD as a sensitivity device, which can achieve real color, and the scanning effect is better.
Second, a small roller barcode scanner.
This is the middle product of the handheld barcode scanner and the platform -type barcode scanner (new appeared in recent years, because it is built -in power supply and small volume is called a notebook code scanner).The resolution is 300DPI, there are two types: color and gray, and the color model is generally 24 -bit color.There are also a few small roller barcode scanners that use CCD technology. The scanning effect is significantly better than that of CIS technology. However, due to structural restrictions, the volume is generally significantly greater than CIS technology.The small roller design is to fix the lens of the barcode scanner, and the object to be scanned by the mobile scan is scanned by the lens. It is like a printer when it operates.Too thick.The biggest advantage of this barcode scanner is that the size is small, but because there are many limitations to use, such as only scanning thin paper, the range cannot exceed the size of the barcode scanner.
3. Platform barcode scanner.
Also known as a flatcode scanner and desktop barcode scanner. At present, most of the barcode scanners on the market belong to the flatcoded barcode scanner, which is the mainstream of the present.The optical resolution of this type of barcode scanner is between 300DPI-8000DPI. The color digit is from 24 bits to 48-bit, and the scanning surface is generally A4 or A3.The advantage of a flat -type type is like using a copy machine. As long as the upper cover of the barcode scanner is opened, it can be scanned whether it is books, newspapers, magazines, and photos.The best in the device.
Barcode scanner interface type
SCSI (small computer standard interface)
The maximum number of connection devices of this interface is 8, usually the maximum transmission speed is 40m/s, which is fast, and generally connects high -speed equipment.The installation of SCSI devices is more complicated. Generally, SCSI cards are generally added to the PC, which is prone to produce hardware conflicts, but powerful.
EPP (enhanced parallel interface)
A enhanced two -way parallel transmission interface with a maximum transmission speed of 1.5Mbps.The advantage is that no other card is needed in PC, the number of unlimited connections (as long as you have enough ports), the installation and use of the device are easy.The disadvantage is that the speed is slower than SCSI.This interface replaces the SCSI interface in cases where low -end performance requirements are high due to simple and convenient installation and use.
USB (General Serial Bus Interface)
A maximum of 127 units can be connected, and the current USB1.1 standard has a maximum transmission speed of 12Mbps, and there is a complementary channel used to transmit low -speed data.In the future, if there is a USB2.0 standard barcode scanner, the speed may be extended to 480m/s.It has a thermal insertion function, that is, plug and play.The barcode scanner of this interface has gradually popularized with the establishment and promotion of the USB standard under the push of Intel.
It is similar to USB usage. It requires a smart head to be converted. The scanned guns that are generally purchased will be carried.There are still many companies using PS2 interfaces.