界面，如按钮，蜂鸣器和显示器。（3）微控制器的运行稳定性测试。（4）检

Interfaces such as buttons, buzzers and displays. <br>(3) The operation stability test of the microcontroller. <br>(4) Check the sensitivity and detection distance of the sensor. <br>(5) The actual running speed of the DC motor. <br>(6) Control clearing test for remote control. <br>In the above tests, it was found that the function is normal, based on the original intention of the design and obtained many performance indicators. <br>5.3 Path detection <br>The five magnetic sensors installed at the bottom of the car can successfully identify black and white lines and realize intelligent tracking. When the installation direction of the five sensors points downward, it is also possible to determine whether the cliff has reached the edge: if one of the five sensors does not detect a reflected signal, it means that the front of the trolley has reached the edge of the cliff, and it can be reversed and turned to continue. .

Interfaces such as buttons, buzzers and displays.<br>(3) Operation stability test of microcontroller.<br>(4) Check the sensitivity and detection distance of the sensor.<br>(5) Actual operating speed of DC motor.<br>(6) Control clearing test of remote control.<br>In the above test, it is found that the function is normal, based on the original intention of the design, and many performance indexes are obtained.<br>5.3 path detection<br>The five magnetic sensors installed at the bottom of the vehicle can successfully identify black and white lines and realize intelligent tracking. When the installation direction of the five sensors points downward, it can also determine whether the cliff has reached the edge: if one of the five sensors does not recognize the reflected signal, it indicates that the front of the trolley has reached the edge of the cliff and can reverse to continue to move forward.

Interfaces, such as buttons, buzzers and displays. (3) Running stability test of microcontroller. (4) Check the sensitivity and detection distance of the sensor. (5) Actual running speed of DC motor. (6) Control clearance test of remote control. In the above test, it is found that the function is normal, based on the original intention of the design, and many performance indexes are obtained. 5.3 Path detection Five magnetic sensors installed at the bottom of the car can successfully identify black and white lines and realize intelligent tracking. When the installation direction of the five sensors points downward, it can also be determined whether the cliff has reached the edge: if one of the five sensors does not recognize the reflected signal, it indicates that the front of the cart has reached the edge of the cliff, and it can turn backwards to keep going.