The shrinking machine is the research object, and the design of the air compressor monitoring system based on Kingview software is studied. Dongfeng Commercial Vehicle Company's assembly plant has 3 complete vehicle assembly lines 2 system hardware design and a testing workshop. The compressed air required by the workshop is provided by 3 pairs of air compressors and cold dryers, respectively located in three air compressors 2.1. Discussion room for PLC selection. In this paper, the main selection of air pressure PLC in the main assembly plant of Dongfeng Commercial Vehicle Company is the PLC input and output points, calculation technology and automatic storage capacity, control functions and so on. When estimating the input and output points, you should also consider increasing the expansion margin by 10% and 20%. The storage capacity is the size of the hardware storage unit that the programmable controller itself can provide. The size of the storage unit of the application used by the user is the program capacity, so the program capacity is smaller than the memory capacity. When estimating storage capacity, it is usually replaced by a storage capacity estimate of the PLC application. The total number of words in the memory is generally 10 2.2 analog input module analog input module is the A / D conversion module, in this design, the OMRON company's CJ1W-AD081-V1 model of the analog input module. The module has eight independent analog input channels. The input signal of each channel can be a voltage signal with a voltage of 15V. It can also be a current signal with a current of 420mA. The function of the analog input module is to convert the input analog signal into a 16-bit binary signal. In decimal notation, it converts the value range to 065535. After conversion, the signal is sent to the PLC for further processing. By setting the corresponding switch value, we can control the corresponding circuit. After the temperature analog A/D conversion is processed by PID, the analog signal such as voltage or current is sent to the electric control valve through D/A conversion to adjust the valve opening. We will detail the conversion of various sensor A/D values ​​and the calculation of the electric valve opening degree below. Assume that the standard current signal range of the analog quantity is A.Am such as: (420mA), and the value range after A/D conversion is D.Dm (6400-32000), assuming that the standard current signal of the analog quantity is A, after A/D conversion The corresponding value is D. Since it is a linear relationship, the function relationship can be expressed as A=f(D), and its mathematical equation is as in equation (1): According to formula (1), we can conveniently calculate 4 based on the value of D. value. The equation is inversely transformed to obtain a functional relationship D = / (4) mathematical equation such as equation (2): the analog input module CJ1W-AD081-V1 has 8 analog input ports, such as. 2.3 PLC wiring diagram system consists of three air compressor stations, three air compressor stations are located in the line outer wall, three-line outer wall and detection line. Control and acquisition of signals are performed by three PLCs. The PLC wiring diagram of the analog input module No. 1 and No. 2 air compressors is as shown. No. 2 and No. 2 air compressor PLC wiring diagram PLC expansion diagram of the digital expansion module, as shown. Using digital I/O connection cable to digital expansion and output module and CJ unit digital input and output expansion PLC wiring diagram Li Huiling, etc.: Design and implementation of PLC based air compressor remote monitoring system 3 software design in air compressor remote monitoring system design In the PLC, the PLC is mainly used to control the start and stop of the air compressor. The software design of PLC mainly refers to the design of PLC ladder diagram of lower computer. 3.1 System Control Flow Chart The software design of the program control system adopts a ladder diagram and adopts a modular design method. The functions required by the entire control system are divided into several modules and then designed separately. The advantage of this is that the design is convenient. It is easy to modify the program, making the program clear and easy for the user to understand and master. The system control flow chart is as shown. System Control Flow Chart Kingview System Development 4 Conclusion The system uses PLC to control the start and stop of the air compressor, and adjusts the temperature and humidity of the outlet. The Kingview software is used for remote monitoring. After time proved, the system is running reliably. The design requirements and objectives are achieved. Hose Clamps,Double Wire Hose Clamps,Two Ear Hose Clamps,Single Ear Hose Clamp SHIJIAZHUANG STRONGFLEX I/E CO.,LTD. , https://www.sjzhydraulichose.com