With the advancement of national informatization, electronic technology has been more widely used. As a traditional electronic technology, embedded technology will play a greater value in the future because of the development of the Internet of things.
Embedded system is a kind of special computer system which is completely embedded in the controlled device and designed for specific application. According to the definition of British Institute of electrical engineers, embedded system is control, monitoring or auxiliary equipment, machine or equipment used for factory operation. Unlike general-purpose computer systems such as personal computers, embedded systems usually perform pre-defined tasks with specific requirements. Because the embedded system only aims at a special task, designers can optimize it, reduce the size and reduce the cost. Embedded systems are usually mass-produced, so individual cost savings can be scaled up to hundreds of times with production.
Embedded system is used to control or monitor large-scale equipment such as machines, devices, factories and so on. The definition of embedded system generally accepted in China is: application-oriented, computer technology-based, software and hardware can be tailored to meet the strict requirements of application system on function, reliability, cost, volume, power consumption, etc. Usually, embedded system is an embedded processor control board whose control program is stored in ROM.
In fact, all devices with digital interfaces, such as watches, microwave ovens, video recorders, automobiles, etc., all use embedded systems. Some embedded systems also contain operating systems, but most embedded systems implement the whole control logic by a single program. The core of embedded system is composed of one or several microprocessors or single-chip microcomputers which are pre programmed to perform a few tasks. Different from the general-purpose computer which can run the software selected by users, the software on embedded system is usually temporarily unchanged; therefore, it is often called “firmware”.
With the popularity of medical electronics, smart home, logistics management and power control, the embedded system takes advantage of its accumulated experience, attaches importance to and seizes this opportunity, and tries to combine with the application sensing unit on the basis of mature platform and products, expand the supporting ability of IOT and perception, and explore the application of IOT in a certain field. As an important technology of the Internet of things, the embedded system perspective is helpful to understand the essence of the Internet of things.
This has two meanings: first, the core of the Internet of things is still the Internet, which is an extension and expansion network on the basis of the Internet; second, its user end extends and extends to any object to carry out information exchange and communication, and must have the intelligent terminal constructed by embedded system. Therefore, the Internet of things system is a system architecture that connects any object with the Internet according to the agreed protocol through radio frequency identification (RFID), infrared sensor, global positioning system, laser scanner and other information sensing equipment, for information exchange and communication.
The Internet of things not only provides the connection of sensors, but also has the ability of intelligent processing, which can implement intelligent control of objects, which is what our embedded system can do. It is true that the Internet of things combines sensors with intelligent processing, and uses various intelligent technologies such as cloud computing and pattern recognition to expand its application fields. From the massive information obtained by sensors, meaningful data can be analyzed, processed and processed to meet the different needs of different users and find new application fields and application modes.
Embedded system is widely used in the Internet of things, covering intelligent transportation, environmental protection, government work, public safety, safe home, intelligent fire protection, industrial monitoring, environmental monitoring, street lighting control, landscape lighting control, building lighting control, square lighting control, elderly care, personal health, flower cultivation, water system monitoring, food traceability, enemy investigation and intelligence Collection and other fields.