Research On Precision Fire Extinguishing Control System Of Intelligent Fire Monitor

With the rapid development of China’s economy and the steady progress of urbanization,the number of various large buildings has increased rapidly,and it has the characteristics of high density,many types,and complex sub-bureaus.Fire safety has become an important factor affecting economic development and social stability.As the most commonly used fire extinguishing equipment at this stage,fire water cannons are often used to extinguish the fire source on the spot in the first place,reducing casualties and property losses.Therefore,it is necessary to conduct research on further improving the fire extinguishing efficiency of fire water monitors.However,in the past,experiments on the precise fire extinguishing of fire water monitors often required the purchase of a large number of equipment,and there were disadvantages such as poor repeatability and low cost performance.Therefore,this subject builds a virtual simulation environment to study the jet flow of the fire water monitor,analyze the factors affecting the jet hit,and propose a precision improvement plan,and conduct experimental verification in the virtual simulation environment.This paper takes the fire water gun jet as the research object,combines the theory and technology of hydrodynamic analysis,Matlab simulation,unit environment building and fuzzy PID control,establishes virtual experimental environment,and develops the research on improving the accuracy of fire water gun.The main contents are as follows: First,the traditional fire water gun experimental system is analyzed,and then the virtual simulation technology is introduced into the experimental system.The experimental system of fire-fighting gun under virtual simulation environment is proposed,and the research framework and components of the system are clarified,which provides the theoretical basis for subsequent experiments.The force analysis of water micro-element is carried out,and the simulation system is established with Matlab under the consideration of air resistance and gravity.The simulation is carried out through the linkage of air resistance module,motion module and initial module.Constructing an ideal jet trajectory model,the accuracy of which is verified by comparing it to the actual data,the movement of the water gun jet is precisely restored.Through the analysis of the jet trajectory model,it is determined that the range of the water cannon is related to the pitch angle under a certain flow rate.Aiming at this conclusion,the pitch angle and flow rate of the water cannon that affect the landing accuracy of the water cannon are studied.Matlab toolbox is used to complete the curve fitting of pitch angle and range and the design of flow fuzzy controller.Finally,the fitting algebraic formula of pitch angle and range and the fuzzy control table of flow are obtained.Then,based on the PLC controller,the pitch compensation scheme and the flow fuzzy PID control scheme are formulated.After completing the compensation scheme design,the virtual experiment environment is built.Use 3dsmax software to model and make equipment model.The pitch angle compensation experiment and flow control experiment scenes are set up in Unity.Complete equipment control,communication and other functions by writing scripts.The simulation of jet trajectory in Unity environment is realized according to the coordinates of key points of jet trajectory.Compile PLC control program and carry out simulation experiment according to the set scheme.Compare the control effect of fuzzy PID control and ordinary PID control with the deviation of the track falling point before and after compensation.Achieve the expected experimental objectives,improve the visibility of the experimental operation stage,meet the diverse experimental needs,and provide a reference case for the application of virtual simulation technology in the fire water monitor experiment.