For improving assembly quality and automation of electric connectors, a solution of automatic assembly is discussed in this paper. With the machinery vision system, defects of the parts to be assembled can be real-time surveyed. By using the complex image recognition technology, the recognizing accuracy and reliability can be achieved. The designs of NC dividing head and smart positioning unit can make the process of transmission and assembly more perfect and effective. The optimal design of the mechanical structure has been made by virtual prototype technology. The designs of PLC control system and pneumatic system which are used in the automatic assembly machine have also been discussed. The control strategies of assembling process are quite challenges. The control profile of three stages has been used in the pressing assembly process, which can punch the parts assembled properly and smoothly without any surface damage. Also the application shows that the design is effective.
The application of a new microbridge mass airflow sensor is presented. Based on the introduction of the sensor’s I2C interface principle, TI’s ultralow power consumption MSP430F5438 micro controller is used as core processor to design a measurement system which has a good low power consumption character. The performances of the system are examined by the experiments. The result of the experiments can indicate that the relative error of the system is less than3.5%, and the sensor has the characteristics of high accuracy, low power consumption, fast response, strong anti-interference ability, etc.
Because ordinary hydraulic system exists multiple fault, power waste and hard controlling in actuators due to the complexity of actuators and variability of load. A new hydraulic system based on the load sensing technology is designed for the new type steel arch installing machine. The results of the simulation for forearm loop based on AMESim show that the designed hydraulic system is energy-efficient and load sensing function is effectively achieved, the actuator control performance is well.
In the rugged topography of sugarcane field, to make the cutting platform keeping a setted height off field surface is one of the technical problems which combined sugarcane harvester is confronted with. Through studying the sugarcane field condition and cutting platform following system of combined sugarcane harvester, designed a type of cutting platform following system based on electro-hydraulic proportional technique, and simulated it with AMESim software.
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