The invention relates to the technical field of grab cranes, and provides an automatic control system of a grab crane, which comprises a main control unit, a laser transmitting circuit and a laser receiving circuit, the laser transmitting circuit comprises a switch tube Q3, a switch tube Q2, a laser transmitter LD, a resistor R6 and an operational amplifier U2, the control end of the switch tube Q3 is connected with the main control unit, the first end of the switch tube Q3 is connected with a 9V power supply, and the second end of the switch tube Q3 is connected with the operational amplifier U2. The second end of the switch tube Q3 is connected with the first end of the switch tube Q2, the second end of the switch tube Q2 is connected with the anode of the laser transmitter LD, the cathode of the laser transmitter LD is grounded, the in-phase input end of the operational amplifier U2 is connected with a 5V power supply through a resistor R6, the first end of the switch tube Q2 is connected with the inverted input end of the operational amplifier U2, and the output end of the operational amplifier U2 is connected with the control end of the switch tube Q2. By means of the technical scheme, the problem that in the prior art, control over ascending and descending of the grab bucket to the limit position is not accurate is solved.
本发明涉及抓斗起重机技术领域,提出了一种抓斗起重机自动控制系统,包括主控单元、激光发射电路和激光接收电路,激光发射电路包括开关管Q3、开关管Q2、激光发射器LD、电阻R6和运放U2,开关管Q3的控制端连接主控单元,开关管Q3的第一端连接9V电源,开关管Q3的第二端连接开关管Q2的第一端,开关管Q2的第二端连接激光发射器LD的阳极,激光发射器LD的阴极接地,运放U2的同相输入端通过电阻R6连接5V电源,开关管Q2的第一端连接运放U2的反相输入端,运放U2的输出端连接开关管Q2的控制端。通过上述技术方案,解决了相关技术中抓斗上升、下降到极限位置的控制不精准的问题。
Automatic control system of grab crane
一种抓斗起重机自动控制系统
2023-10-10
Patent
Electronic Resource
Chinese
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