News Center

What is the scanning principle of bar code scanning gun technology?

Release Time:2020-06-17

Barcode scanning gun technology: commodity bar code coding principles When coding goods, the following basic principles should be observed: the principle of uniqueness and uniqueness is the basic principle of commodity coding. It means that the same commodity should be assigned the same commodity code, and commodities with the same basic characteristics are regarded as the same commodity; different commodities must be assigned.

When coding goods, the following basic principles should be observed:

1) Uniqueness

The principle of uniqueness is the basic principle of commodity coding. It means that the same commodity should be assigned the same commodity code, and commodities with the same basic characteristics are regarded as the same commodity; different commodities must be assigned different commodity codes. Commodities with different basic characteristics are considered different commodities.

2) Stability

The principle of stability means that once the commodity identification code is allocated, it should remain unchanged as long as the basic characteristics of the commodity have not changed. The same commodity code must be used for the same commodity, whether it is long-term continuous production or intermittent production. Even if the product ceases production, the code should not be used on other products for at least 4 years.

3) Unmeaningful

The principle of non-meaning means that each digit in the commodity code does not represent any specific information about the commodity. Meanful code usually results in a loss of coding capacity. When the manufacturer compiles the commodity code, it is best to use the unmeaningful serial number.

For some commodities, additional information such as production date, expiration date, batch number and quantity may need to be known during the circulation process, at which point the application identifier (AI) can be used to meet the labeling requirements for additional information. The application identifier consists of 2 to 4 digits and is used to identify the meaning and format of the data that follows.

What is the scanning principle of bar code scanning gun?

Different barcode scanners are also called barcode readers, barcode scanners, barcode scanners, barcode scanners and barcode scanners.

Bar code scanner uses photoelectric principle to convert bar code information into computer acceptable information input equipment, commonly used in libraries, hospitals, bookstores and supermarkets, as an input means of rapid registration or settlement, the bar code information on the outer packaging of goods or printed matter is read directly and input into the online system.

1. Bar code scanner is a device used to read the information contained in the bar code. The structure of the bar code scanner is usually the following parts: light source, receiving device, photoelectric conversion component, decoding circuit, computer interface.

2. The basic working principle of barcode scanner is:

The light emitted by the light source irradiates the bar code symbol through the optical system, and the reflected light is imaged on the photoelectric converter through the optical system to generate an electrical signal. The signal is amplified by the circuit to generate an analog voltage, which is proportional to the reflected light irradiated on the bar code symbol. After filtering and shaping, a square wave signal corresponding to the analog signal is formed, the decoder is interpreted as a digital signal that can be directly accepted by the computer.

Ordinary barcode scanners usually use the following three technologies: light pen, CCD, laser

Products have their own advantages and disadvantages. The author thinks that no scanner can have advantages in all aspects. I think Kecang Technology [www.techtron.cn] has a saying: "There is no best, only the right one".