一种新型金属探测小车的研制

摘要

A mobile car with automatic metal detection is designed.LDC1000 digital inductance sensor is used as the metal detection sensor,sensor is connected with the inductance coil which is made by authors.When the metal is near the coil,the digital output data sampled by sensor will change greatly,The data are sent to STM32 through the hardware SPI interface for process and display.The coil can effectively improve detection distance to 10cm.STM32 is used as the main control,the motor drive circuit and Bluetooth communication circuit are designed,through the mobile phone the car can be remotely controlled.When some metal has been detection,it will send out sound and light alarm signal.Test results show that the metal detection car can use mobile phone remote control,the effective range is up to 10 m,it can detect 0.6 mm diameter of thin wire,the metal area is larger,the effect is more obvious.%设计了一个自动金属探测的移动小车.采用LDC1000电感数字传感器作为金属探测传感器,传感器连接自制的电感线圈,当金属物靠近线圈时,传感器输出的数字量将会发生明显的变化,通过硬件SPI接口将数据送给STM32进行处理显示.自制线圈可将探测的有效距离提高到10 cm.以STM32作为主控,设计了电机驱动电路和蓝牙通信电路,通过手机可遥控小车的行驶,检测到金属时有声光报警提示.测试结果表明,手机遥控有效遥控距离达到10 m,能够探测到直径为0.6 mm的细铁丝,以及比它更大的金属,金属面积越大,效果越明显.