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由于轮胎吊的操作室和驾驶室合二为一,且处于整机的上车部分,同上车一起进行全回转,操作室对下车的控制信号以及下车的检测、反馈信号必须通过中央回转的碳刷来实现互相传输。探讨在保证上下车顺利通讯并准确控制下车各个执行机构工作的前提下,如何尽量减少中央回转碳刷数量,降低制造、维修成本的方法。通过比较分析得出将两个PLC分别置于该车的上下车部分,用1根三芯的屏蔽电缆在两个PLC间进行数据传输,通过对PLC编程来实现该种类型吊车上下车的控制和检测信号的传输。考虑到吊车的操作方便性,增加了触摸屏在上车的应用,通过触摸屏的触摸按钮来控制上车PLC,再通过上车PLC和下车PLC间互传数据,最终实现触摸屏控制下车各个电磁阀,并显示下车PLC传输上来的各个检测数据。经过改造的轮胎吊工作情况良好,改造成本较低。
As the tire crane operating room and the cab combined, and in the car part of the car, with the car on the full swing, the control room to get off the control signal and get off the test, the feedback signal must be through the central rotation Brush to achieve mutual transmission. To explore ways to minimize the number of rotary carbon brushes in the central government and reduce the manufacturing and maintenance costs under the precondition of ensuring the smooth communication and getting off and accurately controlling the work of various implementing agencies. Through the comparative analysis, it is concluded that two PLCs are respectively placed in the upper part and the lower part of the car, and a three-core shielded cable is used to transmit data between the two PLCs. The PLC of the crane is controlled by the PLC And the detection signal transmission. Taking into account the ease of operation of the crane, an increase of the touch screen in the car application, through the touch screen touch button to control the car on the train PLC, and then get off the car through the PLC and PLC data transfer between each other, the ultimate realization of the touch screen to get off the various electromagnetic Valve, and get off the PLC transmission of the various test data. The modified tire crane works well and has a lower transformation cost.