Sonar exploration

Sonar technology utilizes the propagation characteristics of sound waves in water to navigate and measure distance through electroacoustic conversion and information processing. The propagation speed of sound waves in water is about 1440 meters per second, which is more than four times that of air, and the attenuation in water is smaller than that of light. Taking advantage of this, the sonar system accurately calculates the distance to the target object by emitting ultrasonic waves with frequencies higher than 20 kHz and measuring their echo return time. The higher the frequency of the emitted sound waves, the finer the image, but the detection range will be relatively reduced. The acoustic system of the "Striver" manned deep-sea submersible integrates various sonar devices, such as all terrain terrain detection sonar, multi beam forward-looking sonar, and collision avoidance sonar. These devices enable the "Striver" to "listen" (detect), "speak" (communicate), and "see" (image) in the deep sea, achieving complete localization of technology and breaking through the technical difficulties of deep-sea operations.

The unit is designed for unsupervised public use: controls are recessed or shielded, moving parts are enclosed, and the interface is operable by a child of about six with no instruction. Where a screen is used, the language can be switched without changing the hardware, and the content can be replaced on site.

Sonar, as a core technology in the field of underwater acoustics, is essentially a technical system that utilizes the propagation and reflection characteristics of sound waves in water to achieve underwater navigation, ranging, and target detection. The core logic revolves around the "underwater propagation law of sound waves". 1、 Core foundation of sonar technology: underwater propagation advantage of sound waves. Sound waves are the core carrier for sonar detection, and compared with other detection methods (light, electromagnetic waves), they have irreplaceable propagation advantages underwater: in underwater environments, the penetration ability of light is extremely strong and limited, and electromagnetic waves attenuate rapidly during propagation, making it difficult to achieve long-distance detection; The propagation attenuation amplitude of sound waves in water is small, which enables long-distance transmission. Low frequency sound waves can also penetrate the seabed strata and obtain relevant information inside the strata. This is also the key reason why sound waves have become the core means of underwater detection. The core working logic of sonar can be summarized as "transmission reflection reception solution".