The OCULUS series multi beam imaging sonar adopts multi beam transmission and reception technology, beamforming and control technology, high-frequency and dual frequency switching technology, real-time signal processing and imaging technology, and environmental adaptive calibration technology. Through multi beam coverage, directional control, frequency optimization, and intelligent algorithms, it achieves high-resolution, real-time dynamic underwater 3D imaging, suitable for precise detection and navigation in complex environments. The following are specific technical methods:
1、 Multi beam transmission and reception technology
Beamforming principle: The OCULUS series multi beam imaging sonar emits multiple acoustic beams simultaneously through multiple transmitting units in a sonar array (usually a linear or matrix array). These sound waves are emitted at different angles, covering a larger area underwater, forming a wide sector illumination of the seabed or underwater targets.
Reception and echo processing: When sound waves encounter underwater objects or the seabed, reflection occurs. The reflected sound waves are received by the receiving unit in the sonar array. By analyzing the time and intensity of multiple received echo signals, the distance, shape, and features of the target object can be calculated.
2、 Beamforming and Control Technology
Beam directional control: The OCULUS series sonar adopts beamforming technology, which adjusts the signal phase of each transmitting and receiving unit to ensure that multiple beams present a predetermined direction in water. This technology allows for the simultaneous processing of data from multiple beams and enhances the clarity of underwater imaging by optimizing the angle of the beams.
Beam quantity and coverage: The OCULUS series sonar offers multiple models, with beam quantities ranging from 256 to 512 and beam spacing ranging from 0.16 ° to 0.5 °. This design enables sonar to cover a wider underwater area while maintaining high-resolution imaging capabilities.
3、 High frequency and dual frequency switching technology
High frequency mode: The OCULUS series sonar supports high-frequency acoustic frequencies (such as 750kHz, 1.2MHz, 2.1MHz, etc.), providing high-definition images of close range targets. High frequency mode is commonly used for small target search and close range navigation, which can capture subtle features of underwater objects.
Dual frequency switching: Some models (such as M750d, M1200d) support dual frequency switching technology, which can operate at different frequencies to meet different detection needs. For example, it provides a ranging capability of 120 meters at a frequency of 750kHz and 40 meters at a frequency of 1.2MHz. This flexibility enables sonar to perform at its best in different scenarios.
4、 Real time signal processing and imaging technology
Digital Signal Processing (DSP): The OCULUS series sonar uses efficient digital signal processing technology to filter, denoise, and enhance the received echo signals. These processing steps help improve the quality of the signal, reduce noise interference, and thus obtain clearer underwater images.
Real time imaging and dynamic updates: By continuously collecting and processing data, the OCULUS series sonar can generate real-time underwater images and provide dynamic underwater scenes. This function is particularly suitable for situations that require real-time monitoring, such as underwater surveys, diving operations, and marine engineering.
5、 Environmental adaptive calibration technology
Sound velocity profile measurement: Due to the influence of factors such as temperature, salinity, and pressure on the sound velocity in water, the OCULUS series sonar has a built-in sound velocity profile measurement function. By continuously measuring pressure and water temperature, combined with user input of water salinity values, sonar can automatically calculate sound velocity profiles and correct measurement errors.
Automatic gain control: In order to generate optimal images in different environments, the OCULUS series sonar is also equipped with an automatic gain control algorithm. This algorithm can automatically adjust the gain of the receiver based on the strength of the echo signal, ensuring that the image uses the entire range of the selected color palette, thereby displaying fine textures and details.