低成本微型测距雷达设计

为了小型化与低成本的目的,微型测距雷达选用了低价格、高性能的单片机和近几年发展起来的数字与模拟电路,形成三角波调制的雷达调频连续波方式对距离进行测量。利用单片机中断方式判断三角波的正负斜率,方便地区分接收回的三角波正负斜率的频率差,进而求出距离和速度。试验结果表明,测试距离精度满足要求,但混频输出灵敏度偏低,测试距离较近。这说明微型测距雷达设计原理正确,经过改进,其用途和前景广阔。

Design of Low-cost Miniature Radar for Range-finding

For the purpose of miniaturization and low cost,the low-cost high-performance SCM,recently-developed digital circuits and analog circuits are selected by the miniature range-finding radar based on triangular wave continuous wave modulation to implement rhe range-finding.The positive or negative slope is judged with the single-chip interruption mode,which can easily compute the frequency deviation from the radar echo,and derive the range and velocity of the radar target.The experimental results show that the detection accuracy satisfies the requirement,but the detection range is short due to the poor sensitivity of the mixer output,that the design principle of the radar is reasonable and feasible,and that the radar will have bright future after a further improvement.