Ultra-short baseline underwater positioning method and system based on active target detection principle

Abstract

The invention discloses an ultra-short baseline underwater positioning method based on an active target detection principle. The method comprises the following steps of adopting a microcontroller to generate a GOLD sequence; adopting a modulator to modulate a sinusoidal signal and form a modulating signal according to the GOLD sequence; adopting a matching amplifier to matching and amplifying the modulating signal; adopting an energy converter to emit an ultrasonic incident wave according to the matched and amplified modulating signal; adopting a receiving array to receive a reflected ultrasonic echo wave as the ultrasonic incident wave is contact with an object to be positioned; adopting a filter amplifier to filter and amplify the ultrasonic echo wave; adopting the microcontroller to collect and demodulate the filtered and amplified ultrasonic echo wave to obtain an echo wave sequence signal; utilizing an FFT (Fast Fourier Transform Algorithm) to calculate the period and the phase position of the echo wave sequence signal; adopting a relationship between a physical law and a solid geometry to obtain a three-dimensional coordinate of the object to be positioned according to the period and the phase position. The invention also discloses an ultra-short baseline underwater positioning system based on the active target detection principle. The method and the system can realize multisystem and multitarget detection.

Description

technical field [0001] The invention relates to positioning technology, in particular to an ultra-short baseline underwater positioning method and system based on the principle of active target detection. Background technique [0002] With the development of science and technology, human beings' development and cognition of resources are not limited to land resources, but gradually began to expand to the ocean. Therefore, the underwater positioning and detection technology has been paid more and more attention by people. The early long baseline positioning and short baseline positioning techniques have been widely used, but both methods have great disadvantages, and then the ultra-short baseline measurement method emerged as the times require. However, the traditional ultra-short baseline measurement method needs to place a transponder in the water, which adds a lot of limitations to the measurement, and only uses the traditional ultrasonic signal in the signal source, whic...

AI Technical Summary

Problems solved by technology

Early long-baseline positioning and short-baseline positioning technologies have been widely used, but both methods have great disadvantages. Since then, ultra-short baseline measurement methods have emerged as the times require.

However, the traditional ultra-short baseline...

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