Event detection system based on sound waves and detection method

Abstract

The invention relates to an event detection system based on sound waves and a detection method. The event detection system comprises a sensor, a detection module and a main control module, wherein thewave beam distribution direction of the sensor is approximately parallel with the target movement direction, and the target is related with the detected event; the detection module is used for receiving initial data, and detecting the target, so as to obtain an identifying result and the target distance; the main control module is used for receiving the identifying result and target distance uploaded by the detection module, and the initial data acquired by the sensor. The detection method comprises the following steps of obtaining the imaging data of the sensor, so as to obtain the raw image; performing average filtering and threshold segmentation, so as to obtain a binary segmentation result; according to the binary division result, filling the non-background area, and screening the doubted area; according to an invariant moment, obtaining the shape feature of the doubted area; according to a gray-level co-occurrence matrix, obtaining the texture feature of the doubted area; according to a sensor, classifying the doubted area, and obtaining the classifying result, so as to judge whether the event occurs or not; calculating the target distance. The event detection system and thedetection method have the advantages that the resolution is high, the data is visual, and the positioning for leakage is more accurate.

Description

technical field [0001] The present invention relates to an event detection system and a detection method, in particular to a sound wave-based event detection system and method, mainly involving forward-looking sonar technology, digital image processing technology and the like. Background technique [0002] At present, the main methods of submarine pipeline leakage detection at home and abroad can be basically divided into two categories: hardware detection methods and software detection methods [1] . Among them, the hardware detection method mainly uses the physical and chemical characteristics of the leaked gas to detect the leaked gas by using fixed sensors, such as intelligent pig detection method, leak detection cable method, tracer gas method, optical fiber leak detection method, etc. The software detection method mainly calculates the parameters such as pressure and flow rate in the pipe, and uses the real-time changes of these parameters combined with digital signal ...

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Problems solved by technology

[0005] However, the above first method is passive detection, and the above second and third methods are based on multi-beam sounding sonar. Although it is also an imaging sonar for active detection, its detection range is small and it is under the carrier. Leaks must be detected by scanning with continuous motion and must be moved over the leak point

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