Abstract:

In order to solve the accuracy problem of absolute angle detection of fire monitor in rotation, a method of detecting absolute angle rotation of fire monitor by Hall rotation sensor is proposed. This method mainly uses GD32F103 microcontroller as the main controller. Two DC brush motors are used as actuators to realize the free rotation of fire monitor in the specified area of horizontal and pitching directions. The Hall rotation sensor P3022-V1-CW360 is installed on two DC motors respectively. The Hall rotation sensor will output the detected signal as a voltage value. After the A/D conversion of the main controller, the corresponding DC motor angle rotation value will be output. Finally, the absolute angle value of the fire gun rotation is converted by calculation. The results show that the fire monitor with DC motor has large driving torque, which is suitable for large flow fire extinguishing. By installing Hall rotating sensor on DC motor, it not only reduces the trouble of wiring and clutter like traditional Hall devices, but also has higher sensitivity and high measurement accuracy.

Key words:  fire monitor, hall rotation sensor, GD32F103, absolute angle detection, DC brush motor