With the development of social economy, commercial enterprises such as major shopping malls and chain stores in China have realized the great benefits brought by commercial POS systems to the management of commercial enterprises, and have built commercial POS network systems. For the design and installation principle of the network system, it is preferred to choose the commercial barcode scanner as the front-end data acquisition part of the commercial POS system, and there are three major differences between the factory scanner and the supermarket scanner.
The main commonly used commercial barcode scanners are:
CCD scanners, laser hand-held scanners and full-angle laser scanners.
First, the CCD scanner uses the principle of photoelectric coupling (CCD) to image the barcode printing pattern and then decode it. Its advantages are: no shaft, motor, long service life; cheap.
When selecting a CCD scanner, the two most important parameters are: 1-1 Depth of field Since the imaging principle of CCD is similar to that of a camera, if you want to increase the depth of field, the lens should be enlarged accordingly, making the CCD too large and inconvenient to operate. . Excellent CCDs should be readable without the need for a bar code, and they are medium in size and comfortable to operate.
1-2 Resolution If you want to increase the CCD resolution, you must increase the unit element of the photosensitive element at the image. Low-cost CCD is generally 5 pixels (pixel), reading EAN, UPC and other commercial codes is enough, it will be difficult for other code systems to read. The mid-range CCD is more than 1024 pixels, and some even reach 2048pixe1, which can distinguish the bar code with the narrowest unit element of 0.1mm.
Second, the laser hand-held barcode scanner is a single-line scanner that uses a laser diode as a light source. It mainly has two types of mirror and speculum.
The representative brand of the mirror type is the SP400, which uses a high-speed motor to drive a prism group to rotate, so that the single-point laser emitted by the diode becomes a line. The cost of the speculum type is lower than that of the mirror type, but the laser gun of this principle is not easy to increase the scanning speed, generally 33 times/second. Individual models, such as Intermec, can reach 100 times/second, and their representative brands are Intermec, Symbol, PSC and POTICON.
When selecting a laser scanner, the most important thing for commercial companies is to pay attention to scanning speed and resolution, and depth of field is not a key factor. Because when the depth of field is increased, the resolution will be greatly reduced. An excellent handheld laser scanner should have a high scanning speed and a high resolution in a fixed depth of field.
3. The full-angle bar code scanning gun is a bar code scanning gun that refracts laser light emitted by a laser diode or multiple scanning lines through an optical system. The main purpose is to reduce the labor of aligning bar codes when collecting cashier data, and should pay attention to the selection when selecting. Its scan line spot distribution:
1. There are multiple parallel lines in one direction;
2. There are multiple scan lines passing at a certain point;
3. The probability of interpretation of each point tends to be consistent within a certain spatial range.
A full-angle scanner that meets the above three points must be the first choice for merchants.
What is the difference between a factory scanner and a supermarket scanner?
One: the scanner IP level is different
First, let's first popularize what is IP.
The IP rating is one of the important safety features of electrical products, often referred to as the enclosure protection level. This group of numbers means that the luminaire housing can ensure that the luminaire works safely in the corresponding natural environment, and at the same time does not cause unsafe to the outside world.
The former means that the scanner can prevent the intrusion of solid matter or liquid from the outside, and will not cause a short circuit or fire, thereby causing an accident; the latter means that the scanner can prevent electric shock and ensure the safety of the user or the unintentional person or animal.
There are many factors affecting electrical safety in the natural environment, such as shock vibration, corrosion, explosion, temperature difference, etc., but the most common are: solid objects: people, animals, tools and dust; liquid: rain, water spray and water infiltration .
Everyone thinks about the industrial environment and the supermarket environment. The industrial environment is relatively harsh compared to the commercial environment. During the process of using the scanner, it is likely to encounter liquid intrusion, severe impact vibration, large amount of dust, etc. factor. Therefore, industrial scanners usually have an industrial rating to determine the stability and reliability of the scanner. No one wants to buy a scanner and it will fail all day, which will delay normal production.
On the contrary, the requirements of the commercial super environment for the IP level of the scanner are greatly reduced.
Two: different scanning gun scanning performance
The environment for industrial applications is very complicated. Sometimes it is necessary to scan the bar code under strong light. Sometimes it must be operated outdoors. Sometimes it is necessary to scan the bar code from a distance. Sometimes it is necessary to scan the bar code for density comparison. These various factors cause the ordinary scanner. Can not meet the special requirements of collecting barcodes in industrial environments. The most common barcode of Shangchao is nothing more than EAN-13 code. Many product barcodes are printed. The barcode quality is very good. It is easy to scan. There are many types of scanners, but no matter which sort of scanner, it is generally It can be scanned.
Three: the difference in the price of the scanner
Industrial scanners are generally resistant to falling, dust, and water, so the price is high. Although Shangchao's scanning guns also have a certain IP rating, the industry rating is generally low for cost considerations. You can't take a malicious shot in a supermarket with a scanner, or go to soak in water, so the super-scanning guns range from a few hundred to a thousand, which is much lower than the industry.
Although the scanners used in factories and the scanners used in supermarkets are different, the ultimate goal is to better scan and collect barcodes. Only different scanners have been used for different usage environments. Then it introduces another interesting question. If the scanner that is used by Shangchao does not scan the barcode, it can be scanned with the industrial scanner. The answer is no. There are many factors that can't be scanned for barcodes. I won't introduce them here. There are detailed analysis in other related articles.
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