Multi-mode high-precision radar ranging filtering method
A radar ranging and high-precision technology, which is applied in the field of multi-mode high-precision radar ranging and filtering, can solve problems such as the decline of ranging accuracy, and achieve the effects of good real-time performance, improved practicability, and high ranging accuracy.
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specific Embodiment 1
[0047] according to Figures 1 to 7 As shown, the present invention is to solve the specific optimization of the above technical problem is: a multi-mode high-precision radar ranging filter method, when the "conventional mode" is the same, the distance output is fast, The long-distance output is slow. This mode includes the following steps:
[0048] Step 1, use a cycle data to coarse the current distance, remember S 0 . In order to improve the ranging accuracy, a multi-cycle accumulation can be used to obtain a rough estimate, and the signal-to-noise ratio of the echo signal at different distances can be given.
[0049] Step 2, using S 0 Calculate the number of cycles under this distance Where K is an input constant, measuring objects as a face target Time Make the same theoretical range accuracy in different distances.
[0050] The number of cycles in step 2 can be based on the system design, and the signal-to-noise ratio at each distance is measured and estimated, and a functi...
specific Embodiment 2
[0061] The "precise mode" is suitable when the object is stabilized, and the ranging accuracy is significantly improved, and the accuracy can be adjusted through the interface, but the single output time is significantly improved. This mode includes the following steps
[0062] Step 1, use a cycle data to roughly test the current distance.
[0063] Step 2, any distance is the result of the measured value using CZT after the CFAR detection is performed after the time domain accumulation.
[0064] Step 2 The number of accumulation should be as large as possible, and the platform jitter, environmental interference, and hardware effects can be eliminated as much as possible.
[0065] Step 3, when a proximity is proximally, the results in step II are substituted into step four as a single measurement value. When the distance is used in a distance, the multiple measurement results are obtained by multiple times, and the average measurement is obtained, and the step 4 is substituted.
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specific Embodiment 3
[0074] The "fast mode" is required to quickly obtain a rough measure, or when the radar is turned on, it is characterized by fast ranging output, but the measurement accuracy is slightly lowered than the above two modes. This mode includes the following steps:
[0075] Step 1, use a cycle data to roughly test the current distance.
[0076] Step 2, through the radar ranging interface input parameter control accumulation, change the time interval of the output signal. Step 2 Input input parameter change k (s 0 The formula structure.
[0077] like Where K is an input constant, only the k is changed when the interface is adjusted to change the number of accumulation cycles.
[0078] Step 3, after the CFAR detection is performed, the distance is estimated by the CZT and the estimation of the method of obtaining the improved Kalman filtering.
[0079] The radar ranging is a measurement tool for oil body, the position of the position, which is a linear frequency modulation millimeter wa...
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