In accordance with the feature of small-flow fire fighting monitor, I.e. , smaller motor drive torque, the control system for large flow fire fighting monitor is designed. In the system, the intelligent integrated power drive chip BIN79785B is adopted to design the drive circuit for large power DC motors both in horizontal and vertical directions of the fire fighting monitor, and to output required torque for driving the rotation of the fire monitor; the limit position of the rotation is detected by using Holzer switch. The main controller LPC1114 is used to detect present operating current of the motor in real time; to judge whether the motor is overload or not, and carry on corresponding action. Through wireless transceiver module nRF905, the fire fighting monitor can be controlled remotely. The tests show that the system works stably and responds quickly, the application is reliable.%针对大多数小流量消防炮电机驱动力矩较小的特点,设计了一种大流量消防炮控制系统.系统采用智能集成功率驱动芯片BTN7975B,设计了消防炮水平和垂直方向上大功率直流电机的驱动电路,以输出满足要求的驱动力矩驱动消防炮转动,同时利用霍尔开关检测消防炮转动极限位置;采用主控制器LPC1114实时检测电机当前工作电流,判断电机是否发生过载,并作出相应的控制动作;通过无线收发模块nRF905实现消防炮的无线遥控.试验表明,系统工作稳定、应用可靠,且响应速度快.
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