Design Of Self Balancing And Height Automatic Control System For Spray Boom

Increasing spray uniformity in field operations is necessary to reduce the amount of chemical used in the field while maintaining the desired biological effects.Because of its advantages of controllable,fast,efficient and automation,the spray bar sprayer is the most widely used model in field wide field.In order to ensure the boom sprayer in the process,to ensure the spraying effect,and avoid spraying rod scratch crop canopy from the distance of spray rod should be kept in a certain range,and always keep at proper distance should be approximately parallel with the canopy.Therefore,it is of great importance to design the automatic adjustment system of spray bar height and balance control system of spray bar to adjust the operation quality of sprayer in real time.The main subjects and conclusions of the research were as follows:(1)The overall structure design of the balance and height adjustmentUsing the Solidworks software design and assembly of the mechanical structure of the spray boom control system,mainly including the spray boom suspension mechanism,spray boom automatic balance mechanism,a height adjusting mechanism and other parts,the three-dimensional optimization design of the mechanism.After experiments it shows that the normal movement ofmechanical system that meet the requirements of the intended target.(2)The design of system of controlling spray boom balanceTo solve the problem of balance of ejector boom,an automatic balancing control system of ejector boom is designed.Given the overall structure of the spray boom balance detection principle,control system and control system,according to the structure of the main hardware was optimized according to the control requirements for the design of control program,hardware and software design of spray boom control system to complete the overall balance.(3)Control system of spray boom heightThe distance by ultrasonic sensor for the detection of both ends of the spray rod and crop canopy between the system,when the detected distance and set the height value difference,the boom height were adjusted by hydraulic expansion,so as to realize the automatic adjustment of the height of the spray boom.(4)Design and simulation of hydraulic control circuitThe hydraulic system is used to realize the automatic balance of the spray bar and control the height of the spray rod.The composition and working principle of hydraulic system for balance and height adjustment of spray rod are introduced.The hydraulic system model of spray bar sprayer is established by using AMESim.