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On May 12-14, 2021, Beijing Dorland System Control Technology Co., Ltd. participated in the "2021 China Petroleum and Petrochemical Enterprise Information Technology Exchange Conference" held in Shahe, Beijing. The conference was hosted by the China Petroleum Society and China National Petroleum Corporation.

We all know that a tablet generally refers to a small portable personal computer, with a touch screen as a basic input device. It allows users to work with a stylus or digital pen instead of a traditional keyboard or mouse.

In 2004, Beijing Dorland System Control Technology Co., Ltd. began researching explosion-proof electrical technology and became one of the earliest professional manufacturers and innovative high-tech enterprises in China engaged in independent research and development and production services of intrinsically safe explosion-proof mobile terminal products.

PDA handheld terminal integrates barcode scanning, RFID reading and writing, fingerprint recognition, face recognition and other functions, especially the RFID reading and writing function is widely used. Let us briefly understand the working principle of the RFID system structure:

The RFID portable handheld terminal integrates the antenna, the reader, and the host computer. After the RFID tag enters the magnetic field, it receives the radio frequency signal sent by the reader and transmits the product information stored in the chip with the energy obtained by the induced current. Or, the tag actively sends a signal of a certain frequency, the reader reads the information and decodes it, and sends it to the central information system for related data processing.

Explosion-proof mobile phones are mainly used in flammable and explosive scenes, especially suitable for harsh environments with dangerous explosions, such as petroleum, chemical, pharmaceutical, military, oil depots, tank farms and other dangerous places with flammable and explosive gases. This kind of mobile phones can hold normal communication in dangerous.

In recent years, with the continuous improvement of the technical level of the computer industry, the hardware and performance of laptop products are very close to desktop computers. Because of their lightness, portability, and can run without power, laptop has occupied a very important position in daily office situations.