A distance measurement method based on underwater acoustic baseline positioning system
A technology of baseline positioning and ranging method, applied in radio wave measurement systems, positioning, measurement devices, etc., can solve the problems of effect discount, system accuracy limitation, low acoustic transmission rate, etc., to achieve detection accuracy improvement and preservation of relevant characteristics. Effect
Active Publication Date: 2022-04-22
SHANDONG UNIV OF SCI & TECH
View PDF15 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0005] The existing second-generation digital spread spectrum signal communication technology is used for phase measurement and distance measurement, which is limited by the characteristics of low acoustic transmission rate. The effect is still discounted in shallow sea and complex sea environment
The existing underwater acoustic digital broadband spread spectrum communication method is based on wireless CDMA technology. The process of phase measurement and distance measurement using pseudo-random code synchronization process has natural system accuracy limitations. The synchronization accuracy means that the ranging accuracy follows the change of the symbol width
And the existing ranging method is only broadband communication interactive information, not a high-precision ranging method specially designed for underwater acoustic positioning targets
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0053] Below, the technical solutions of the present application will be clearly and completely described in conjunction with the embodiments of the present application and with reference to the accompanying drawings. It should be noted that the embodiments described below are used to enable those skilled in the art to better understand the present application technical solutions, rather than representing all embodiments of the present application. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the scope of protection of this application.
[0054] Expressions such as "first" and "second" used in the description, claims and drawings of this application are to distinguish similar units or objects, not to limit a specific order or sequence, and cannot be understood To indicate or imply relative importance. In addition, the terms "comprising", "having" and any a...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The present invention relates to the field of underwater acoustic measurement, and provides a ranging method based on an underwater acoustic baseline positioning system, which includes the following steps: determining a transmission signal corresponding to an original signal based on a preset spread spectrum signal and a modulation signal, in which the original signal Including transmission time information; transmitting the transmission signal into the underwater acoustic environment; determining an effective signal and a frequency correction value from the continuously received underwater acoustic signal; based on the spread spectrum signal, the modulation signal and the frequency correction value determining a correlation detection signal; determining time-of-arrival information of the effective signal based on the correlation detection signal; determining the propagation time of the transmitted signal and the The distance from the transmitting unit to the receiving unit. The method provided by the invention can accurately realize the high-precision ranging based on the underwater acoustic baseline positioning system.
Description
technical field [0001] The present application relates to the field of underwater acoustic measurement, and in particular, relates to a ranging method based on an underwater acoustic baseline positioning system. Background technique [0002] Acoustic positioning technology is widely used in marine development. Long Base Line (LBL for short), Short Base Line (SBL for short), and Ultra-Short Base Line (USBL for short) acoustic positioning systems , is an underwater acoustic positioning system that has been widely used and developed rapidly in recent years. Limited by the rapid attenuation characteristics of electromagnetic waves in the ocean environment, the propagation medium of the underwater positioning system is replaced by sound waves. [0003] The long baseline and short baseline positioning systems mainly rely on the acoustic ranging method for positioning, the acoustic communication method for ranging, and the target point positioning through multiple acoustic unit re...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G01S5/18G01S11/14
CPCG01S5/18G01S11/14
Inventor 罗宇王浩施剑
Owner SHANDONG UNIV OF SCI & TECH