Today, smartphones and embedded industrial tablets are indispensable electronic products in our daily applications. In the field of industrial applications, industrial tablet computers and embedded fanless industrial computers are gaining momentum. These products belong to one kind of electronic computers. Since they are electronic computers, they all have CPU, GPU, ram, ROM and other core components. Today we will talk about the difference between ram and ROM.

RAM (operation memory) and ROM (storage memory) are also very important for the performance of the embedded fanless industrial computer. RAM (running memory) stores data through some kind of capacitor (DRAM, SRAM or RRAM). Data disappears immediately after power failure, but data throughput speed is very fast. ROM is a kind of memory that can save data and provide quick access when needed after power failure. We will not go into it here. The industrial tablet computer usually uses a kind of storage medium called NAND, such as SSD, U disk and SD card. The traditional storage medium also includes mechanical hard disk (HHD), that is, the traditional optical disk storage, which can keep the stored data not lost after power failure, and can be used for data storage.

Embedded industrial tablet computer has been widely used in many fields, such as transportation, electric power, metallurgy, communication, aerospace, petrochemical and so on. Its performance is not only more and more close to the traditional embedded industrial tablet, but also increasingly diversified and rich in the expansion performance. As one aspect of stereotyped extended application, extended data acquisition board and extended switch device board are more common.

Today, we will expand the application of switching device boards, especially those kinds of switching devices

Current mode full control device BJT: positive continuous base current control is on, if base current is 0, turn off; switching frequency is moderate; bipolar;

Current mode semi control device SCR: pulse gate current control is on, trigger signal can't control on / off; switch frequency is low; bipolar;

GTO: positive pulse gate current control is on, negative pulse gate current (larger) control is off; switching frequency is low; bipolar;

Voltage type full control device p-MOSFET: positive continuous gate voltage control on, negative continuous gate voltage control and keep off; high switching frequency; single pole;

Voltage type full control device IBGT: positive continuous gate voltage control on, negative continuous gate voltage control and keep off; high switching frequency; bipolar;

Voltage type full control device MCT: positive pulse voltage control on, negative pulse voltage control off; high switching frequency (lower than IGBT); bipolar;

Voltage type all control device sit: continuous voltage control on / off; high switching frequency; single pole;

The slogan of the Internet of things is louder year by year, and many new technologies and products are constantly applied. As a key part of the control system, computer is necessary to execute and output instructions.

First of all, in terms of the working environment, the control system is generally located in the computer room, with large dust and general environment. This is that the industrial tablet computer can adapt, and the commercial computer can never play. What's more, even the accumulated dust will make the commercial computer unable to work. Therefore, in terms of environmental adaptability, industrial computers will be better than commercial computers.

Secondly, in terms of the intensity of work, because to keep working at all times, the requirements for heat dissipation and hardware are relatively high, and commercial computers are also slightly inadequate in this respect. Industrial tablets, on the other hand, can maintain good heat dissipation and work continuously for a long time.

Therefore, in view of the above, embedded industrial tablet computers are more suitable for the Internet of things than commercial computers.