Multi-beam sounding signal processing method and device

Abstract

The invention discloses a multi-beam sounding signal processing method and device. The device comprises a receiving transducer array, an analog front-end preprocessing unit, an analog-to-digital conversion unit, a multi-channel data preprocessing unit, a beam forming unit, a primary threshold generation unit, a primary detection unit, a terrain estimation unit, a secondary threshold generation unit, and a secondary detection unit, wherein the primary threshold generation unit carries out Kalman terrain tracking according to a previous frame terrain result so as to generate the detection threshold of a current frame terrain, at the same time the terrain estimation unit, the secondary threshold generation unit and the secondary detection unit are orderly connected to realize secondary detection, and the accuracy of terrain detection is effectively improved. According to the multi-beam sounding signal processing method and device, the terrain detection can be automatically carried out in an actual underwater terrain survey, the frequent manual threshold adjustment operation in a conventional method is reduced, the field operation and office data processing workload of the multi-beam sounding device are reduced greatly, and the method and the device can be widely applied to the field of underwater topographic survey.

Description

Technical field [0001] The invention belongs to the field of multi-beam sounding, and in particular relates to a multi-beam sounding signal processing method and device capable of realizing high-precision topographic measurement. Background technique [0002] Multi-beam detection technology is one of the most widely used underwater topography and landform detection technologies recognized internationally in recent years. It is widely used in many fields, such as marine resource survey, channel survey, marine environment research, underwater topography and underwater Building observation, etc. With the continuous advancement of science and technology, people’s demand for submarine information is getting higher and higher. On the one hand, they hope to present the details of the complex and diverse submarine topography and landforms more clearly. The processing ability and effect of the sounding signal in the beam sounding system have put forward higher and higher requirements. [...

AI Technical Summary

Problems solved by technology

Although this method can effectively reduce the generation of outliers by virtue of the operator's experience, it has a low degree of automation, requires relatively high operator experience, and has a large workload.

At the same time, in order to adapt to the rapid changes of the terrain, the depth threshold range is usually set larger. In waters with large terrain fluctuations, there are more outliers, which virtually increases the workload of outlier elimination in multi-beam post-processing.

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