- 必威体育下载

姓名
邮箱
手机号码
标题
留言内容
验证码

摘要

提出一种基于小波变换思想的水下测距方法. 根据信号的能量一致性以及小波的带通滤波特性, 并以二元样条插值为架构, 实现信号的时频结合. 该方法先将时域信号进行小波时域分解滤波, 获得较为完整的时域有效信息, 然后对初步处理的时域信号进行小波频域分解, 通过找寻信号时频域对应的能量最值位置锁定目标, 实现精确测距目的. 进行不同衰减长度水体的连续光水下测距实验, 分析该方法对连续光水下探测的影响. 经实验验证, 该测距方法在输出功率2.3 W内, 成功实现对8个衰减长度内目标的准确测量, 其测距精度小于1 cm.

关键词:

Abstract

This paper proposes an underwater ranging method based on wavelet transform. First, according to the band-pass filtering characteristics of the wavelet transform, the time-domain signal is decomposed in the frequency domain. The wavelet basis functions with high similarity are established. These wavelet basis functions contain complete frequency domain information of time-domain signals. This method can improve the ability to decompose frequency domain of time-domain signals and extract the information about the effective frequency domain. Then, using the multiple frequency domain decomposition approximations, the effective frequency domain information contained in the time domain signal is completely extracted. The time-frequency signal of wavelet time-frequency fusion ranging takes the energy consistency of the time-frequency domain signal as the link and uses the binary spline interpolation structure to realize the time-frequency combination of the signal. In this method, the time-domain signal is first decomposed and filtered by wavelet time-domain to obtain more complete time-domain effective information. But at this time, the time-domain signal is the superimposed form of frequency-domain information, so the energy domain information contained in the time-frequency signal is decomposed into the wavelet frequency domain through the binary spline interpolation, and the energy expression form of the time-frequency signal can be obtained. The target is locked by finding the position of the maximum value of energy corresponding to the time-frequency domain of the signal to achieve the purpose of precise ranging. By performing the wavelet multi-layer time-domain decomposition filtering first, the frequency domain decomposition range can be effectively reduced, thereby avoiding data redundancy and reducing the ability to realize the effective frequency domain resolution. By using this method we successively carry out continuous light underwater ranging experiments with different attenuation length water bodies and different modulation frequencies, and analyze the influence of this method on continuous light underwater detection. Experiments verify that this ranging method successfully achieves the accurate measurement of targets within 8 attenuation lengths within an output power of 2.3 W, and its ranging accuracy is less than 1 cm; the use of wavelet time-frequency fusion ranging can pass the frequency domain energy decomposition capability enhancement, to a certain extent, compensates for the measurement error caused by the significant attenuation of the effective signal. Therefore, the ranging method can be applied to signals with complex frequency domain information or including a bandwidth.

Keywords:

作者及机构信息

1.
2.

通信作者:杨苏辉,suhuiyang@bit.edu.cn

基金项目:国家自然科学基金(批准号: 61835001)资助的课题

Authors and contacts

1.
2.

Corresponding author:Yang Su-Hui,suhuiyang@bit.edu.cn

Funds:Project supported by the National Natural Science Foundation of China (Grant No. 61835001)

文章全文: translate this paragraph

参考文献

[1]
[2]
[3]
[4]
[5]
[6]
[7]
[8]
[9]
[10]
[11]
[12]
[13]
[14]
[15]
[16]
[17]
[18]
[19]
[20]
[21]

施引文献

下载: 全尺寸图片幻灯片

样本	目标距离/m	回波信号强度/mW	衰减系数/m^–1	平均衰减系数/m^–1
1	0	26.5	—	0.99
	0.25	18.5	0.99
	0.5	9.8	0.99
	1	3.6	0.99
2	0	50	—	2.00
	0.25	18.4	1.99
	0.5	6.5	1.99
	0.6	4.5	2.01
3	0	150	—	3.00
	0.2	45	3.00
	0.4	13.5	3.01
	0.6	4.1	2.99
4	0	150	—	3.50
	0.3	18.4	3.50
	0.5	4.5	3.51
	0.6	2.2	3.49
5	0	200	—	4.50
	0.1	81.5	4.50
	0.2	33	4.51
	0.3	13.5	4.49
6	0	200	—	5.50
	0.1	66	5.54
	0.15	39	5.45
	0.25	12.7	5.51

下载: 导出CSV

[1]
[2]
[3]
[4]
[5]
[6]
[7]
[8]
[9]
[10]
[11]
[12]
[13]
[14]
[15]
[16]
[17]
[18]
[19]
[20]
[21]

[1]	王建海, 钱建强, 窦志鹏, 林锐, 许泽宇, 程鹏, 王丞, 李磊, 李英姿.基于小波变换的多频静电力显微镜动态过程测量方法. 必威体育下载 , 2022, 71(9): 096801.doi:10.7498/aps.71.20212095
[2]	李坤, 杨苏辉, 廖英琦, 林学彤, 王欣, 张金英, 李卓.强度调制532 nm激光水下测距. 必威体育下载 , 2021, 70(8): 084203.doi:10.7498/aps.70.20201612
[3]	代冰, 王朋, 周宇, 游承武, 胡江胜, 杨振刚, 王可嘉, 刘劲松.小波变换在太赫兹三维成像探测内部缺陷中的应用. 必威体育下载 , 2017, 66(8): 088701.doi:10.7498/aps.66.088701
[4]	周先春, 汪美玲, 石兰芳, 周林锋.基于小波与重调和方程的扩散去噪模型的研究. 必威体育下载 , 2015, 64(6): 064203.doi:10.7498/aps.64.064203
[5]	赵辽英, 马启良, 厉小润.基于HIS 小波变换和MOPSO的全色与多光谱图像融合. 必威体育下载 , 2012, 61(19): 194204.doi:10.7498/aps.61.194204
[6]	余海军, 杜建明, 张秀兰.相干态的小波变换. 必威体育下载 , 2012, 61(16): 164205.doi:10.7498/aps.61.164205
[7]	宋军, 许业军, 范洪义.奇偶二项式光场态的小波变换. 必威体育下载 , 2011, 60(8): 084208.doi:10.7498/aps.60.084208
[8]	甘甜, 冯少彤, 聂守平, 朱竹青.基于分块DCT变换编码的小波域多幅图像融合算法. 必威体育下载 , 2011, 60(11): 114205.doi:10.7498/aps.60.114205
[9]	符懋敬, 庄建军, 侯凤贞, 宁新宝, 展庆波, 邵毅.基于小波变换的人体步态序列提取. 必威体育下载 , 2010, 59(6): 4343-4350.doi:10.7498/aps.59.4343
[10]	任磊, 陈祥光, 刘春涛.基于小波变换的时域介电谱分析及其应用. 必威体育下载 , 2009, 58(3): 2035-2041.doi:10.7498/aps.58.2035
[11]	赵文山, 何怡刚.一种改进的开关电流滤波器实现小波变换的方法. 必威体育下载 , 2009, 58(2): 843-851.doi:10.7498/aps.58.843
[12]	邓玉强, 曹士英, 于靖, 徐涛, 王清月, 张志刚.小波变换提取放大超短脉冲载波-包络相位的研究. 必威体育下载 , 2008, 57(11): 7017-7021.doi:10.7498/aps.57.7017
[13]	胡沁春, 何怡刚, 郭迪新, 李宏民.基于开关电流技术的小波变换的滤波器电路实现. 必威体育下载 , 2006, 55(2): 641-647.doi:10.7498/aps.55.641
[14]	邓玉强, 吴祖斌, 陈盛华, 柴路, 王清月, 张志刚.自参考光谱相干法的小波变换相位重建. 必威体育下载 , 2005, 54(8): 3716-3721.doi:10.7498/aps.54.3716
[15]	赵莉, 冯稷, 翟光杰, 张利华.小波变换在心磁信号处理中的应用. 必威体育下载 , 2005, 54(4): 1943-1949.doi:10.7498/aps.54.1943
[16]	邓玉强, 邢岐荣, 郎利影, 柴路, 王清月, 张志刚.THz波的小波变换频谱分析. 必威体育下载 , 2005, 54(11): 5224-5227.doi:10.7498/aps.54.5224
[17]	邓玉强, 张志刚, 柴路, 王清月.小波变换重建超短脉冲光谱相位的误差分析. 必威体育下载 , 2005, 54(9): 4176-4181.doi:10.7498/aps.54.4176
[18]	汪渊, 白宣羽, 徐可为.基于小波变换Cu-W薄膜表面形貌表征与硬度值分散性评价. 必威体育下载 , 2004, 53(7): 2281-2286.doi:10.7498/aps.53.2281
[19]	游荣义, 陈　忠, 徐慎初, 吴伯僖.基于小波变换的混沌信号相空间重构研究. 必威体育下载 , 2004, 53(9): 2882-2888.doi:10.7498/aps.53.2882
[20]	宋菲君, 赵文杰, S. Jutamulia, 宋建力, 姚思一, 王栋.Haar-Gaussian小波变换在边缘测量中的应用. 必威体育下载 , 2003, 52(12): 3055-3060.doi:10.7498/aps.52.3055

计量

文章访问数:3892
PDF下载量:89
被引次数:0

搜索

留言板