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National key construction , the extensive use of concrete mixing equipment , depending on the intensity of concrete projects need to be weighed by the ratio of cement mortar mixing before weighing platform to quickly state level , to ensure that the ingredients measurement accuracy and mixing quality . This paper describes a concrete mixing equipment based on PLC automatic leveling control system . The system using the the location inverse method and tank trailer bogie movement interference to prevent technology , establish a mathematical model to calculate the target length of the cylinder , the ladder program is designed to solve a leveling system for leveling a long time , the problem of low accuracy . Work : survey status quo at home and abroad ; translation of foreign materials ; principle of leveling system analysis and program design ; control system software design , including sensor calibration , leveling ready , automatic leveling , exit leveling and manual leveling , subroutine block design , etc. ; the touchscreen software design , including the main interface , sensor calibration interface , parameter , parameter settings , manual operation interface design ; program debugging and optimization ; developed prototype of a Experiments and field use , the system is designed to achieve the desired objectives , is a fast leveling speed , high- precision , state-of-the-art technology control system . Inclination leveling an accuracy of ± 0.2 °, displacement accuracy of 1mm , the leveling time only 1min . In this paper, design and design analysis method has a similar design reference value , and promote the use of the project , will create considerable economic benefits .
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