声音导向小车的设计与仿真

Design and simulation of voise guidance car

声音导向系统在搜寻生命痕迹中具有重要的现实意义,可以通过声强传感器获知待救人员的地址位置。目前声音导向小车主要类型有:通过语音识别来控制小车,通过发射接收声波信号的时间间隔判断位置、控制小车。这些智能车硬件和软件设计较为复杂。这里以AT89C51单片机为核心,以驻级话筒作为声强传感器,用L298N作为电机驱动芯片,设计制作了一种声音导引系统,并使用软件进行仿真。单片机根据传感器接收到的声强信号判断声源位置,控制电机的运转,使小车运动到目标位置。使用Proteus 7.8软件给出了仿真方案和仿真结果,可以实现追踪声源目标的功能。该设计提出了新的方案,系统设计结构简单可靠,性能良好。

Sound guidance system has important practical significance in search for life, which can get the address location of personnel waiting for rescue by means of sound intensity sensor. The sound guidance cars＇ main types are as follows： the car which is controlled by voice recognition, and the car which determines the position and is controlled by the intervals of transceiv- ing acoustic wave signals. The hardware design and software design of these two types smart cars are very complicated. In this pa- per, a sound guidance system with single chip processor as the core, a microphone as sound intensity sensor and L298N as a motor driver chip is designed. The car moves to the target location according to the sound intensity signal received by the sensor to determine the sound source position and control the motor running. The simulation verification was done. Simulation scheme and simulation result are given by software ProteusT.8, which can achieve the function of sound source tracking. A new scheme is put forward in this design. The system structure is simple, reliable, and its performance is perfect.