From the knowledge of aquaculture, we know that oxygen is one of the essential conditions for the survival and growth of fish. Oxygen content in water is mainly related to natural temperature, humidity and fish density. Fish are very sensitive to oxygen content in water. The traditional way of aquaculture is to judge whether the

In view of the shortcomings of traditional street lamp control system in energy saving and control, a remote wireless street lamp controller is designed in this paper. 　　Based on the ultra-low power wireless transmission module of ZigBee, the controller integrates a variety of sensors to realize automatic detection of pedestrians and vehicles at night, automatically

In this paper, a fuzzy controller for constant pressure water supply of fire pump is designed. Combining with the approximate mathematical model, the model of constant pressure water supply system of fire pump is established and simulated on the platform of Matlab. From the operation of the system and the simulation results, it can be

The integrated design method of model predictive control ensures the stability of the system by designing a set of terminals to meet specific requirements. In this paper, a set of constraints satisfying this requirement is proposed, and then the model predictive controller is solved according to the multi-parameter quadratic programming. A controller based on the

With the development of Beidou satellite application technology in our country, the number of end users of Beidou satellite is also increasing in a large scale. In military, industrial and civil fields, Beidou communication terminals are deployed in large quantities to provide positioning and communication functions. Beidou Short Message Channel is a very narrow channel.

At present, many primary and secondary schools have set up interest groups on plant cultivation science popularization. When the interest groups carry out activities, they often have disputes or even conflicts in key points, such as watering, heating, feeding and watering, because the opinions of participants are often inconsistent. Especially the primary and middle school

Programmable Logic Controller (PLC) is a digital computer used for automation of electromechanical process. In order to ensure the use of programmable controllers in many industries and machines, it is necessary to install and maintain them. This paper describes the installation and maintenance of programmable logic controller (PLC). With the development of science and technology,

Aiming at the failure of the tail-wing deicing system in the process of power-on inspection of a certain type of aircraft, the failure phenomena were checked on the aircraft. Based on the fault analysis method, the causes of the failure were analyzed, the accurate fault location was obtained, the finished product failure was solved, and

In this paper, a detailed analysis and study of various detection and calibration methods of the pressure controller verification device is carried out. Pressure controller verification device integrates vacuum, pneumatic pressure and hydraulic pressure, and has three functions: one machine and three functions; it adopts digital image technology. Using pneumatic pump, hydraulic pump and servo

With the support of major national science and technology projects, China’s electric vehicle industry has developed rapidly. Some new energy vehicles have been developed, such as hybrid electric vehicles, pure electric vehicles, hydrogen fuel cell vehicles and so on. 　　They have been put into trial operation in Beijing, Shanghai and other cities. At the same