阅读说明：本技术 多普勒雷达的运动目标检测方法 (Moving target detection method of Doppler radar ) 是由 吴华平 于 2020-05-07 设计创作，主要内容包括：该发明涉及一种多普勒雷达的运动目标检测方法,包括：向所述多普勒雷达前方发送一固定频率脉冲信号；接收回波信号,所述回波信号由所述雷达周围物体反射形成；对所述固定频率脉冲信号和所述回波信号进行混频,获取中频信号；对所述中频信号进行采样,获取多个采样点,实现所述中频信号的模数转换；对所述采样点构成的采样数据进行滤波处理,获取处理信号；对所述处理信号进行分析运算,进行运动物体检测。(The invention relates to a moving target detection method of a Doppler radar, which comprises the following steps: sending a fixed frequency pulse signal to the front of the Doppler radar; receiving an echo signal, wherein the echo signal is formed by the reflection of the object around the radar; mixing the fixed frequency pulse signal and the echo signal to obtain an intermediate frequency signal; sampling the intermediate frequency signal to obtain a plurality of sampling points, and realizing analog-to-digital conversion of the intermediate frequency signal; filtering the sampling data formed by the sampling points to obtain a processing signal; and analyzing and calculating the processing signal to detect the moving object.)

1. A moving object detection method of a Doppler radar is characterized by comprising the following steps:

sending a fixed frequency pulse signal to the front of the Doppler radar;

receiving an echo signal, wherein the echo signal is formed by the reflection of the object around the radar;

mixing the fixed frequency pulse signal and the echo signal to obtain an intermediate frequency signal;

sampling the intermediate frequency signal to obtain a plurality of sampling points, and realizing analog-to-digital conversion of the intermediate frequency signal;

filtering the sampling data formed by the sampling points to obtain a processing signal;

and analyzing and calculating the processing signal to detect the moving object.

2. The moving object detection method of doppler radar according to claim 1, wherein the number of sampling points is an integral power of 2.

3. The moving object detection method of doppler radar according to claim 1, wherein the filtering processing is performed on the sample data constituted by the sample points using a filtering algorithm, and the filtering algorithm includes at least one of a CIC filtering algorithm and an IIR filtering algorithm.

4. The moving object detection method of doppler radar according to claim 1, wherein the filtering processing is performed on the sample data constituted by the sample points using a filtering algorithm, the filtering algorithm includes a notch filtering algorithm, and the notch filtering algorithm includes at least one of a 50Hz notch filtering algorithm and a 60Hz notch filtering algorithm.

5. The moving object detection method of the doppler radar according to claim 1, wherein the step of performing an analysis operation on the processed signal to detect a moving object includes the steps of:

and judging whether the fluctuation of the processed signal is greater than a first preset value or not, and judging that a moving object exists in a time period corresponding to the intermediate frequency signal when the fluctuation of the processed signal is greater than the first preset value.

6. The method for detecting a moving object of a doppler radar according to claim 5, wherein the step of determining whether the fluctuation of the processed signal is greater than the first predetermined value comprises the steps of:

dividing the processed signal into N sections, wherein each section comprises M sampling points, and obtaining N segmented signals, wherein N, M are all larger than 0 and are integers;

judging whether the fluctuation of the segmented signals is greater than the first preset value or not, and counting the number of the segmented signals with the fluctuation greater than the first preset value;

and judging whether the count value is greater than a second preset value or not, and judging that a moving object exists in a time period corresponding to the intermediate frequency signal when the count value is greater than the second preset value.

7. The method of claim 6, wherein the step of determining whether the fluctuation of the segmented signal is greater than a first predetermined value comprises the steps of:

and judging whether the difference value between the maximum amplitude and the minimum amplitude in the segmented signal is greater than the first preset value, and if so, judging that the fluctuation of the segmented signal is greater than the first preset value.

8. The method according to claim 6, wherein the number of the sampling points in the segmented signal is equal to or greater than 3, and the time intervals between any two adjacent sampling points are equal.

9. The method of claim 5, wherein a detection period is set, and the moving object detection is performed by performing analysis operation on the processed signal in each period.

10. The method of claim 1, wherein the sampling points are stored in a FIFO queue, which is a first-in-first-out queue.