General Introduction

A sonar detector is a device that utilizes the propagation characteristics of sound waves underwater to detect targets. It emits sound waves and then receives the echo signals reflected by the targets. Based on information such as the time, frequency, and amplitude of the echo, it determines parameters of the target, including its position, shape, size, and motion state. Sonar detectors are widely used in fields such as ocean exploration, underwater navigation, military reconnaissance, and fishing. They are important tools for humans to explore and utilize marine resources and ensure underwater safety.

1. Urgent Need to Overcome Technical Bottlenecks

The marine environment is complex and changeable. Factors such as temperature, salinity, and water flow can affect the propagation of sound waves, leading to signal attenuation, refraction, and scattering, which reduce the detection accuracy and reliability. For example, in deep - sea hydrothermal areas, high temperatures can significantly change the propagation characteristics of sound waves and interfere with detection.

The acoustic characteristics of different targets vary greatly. The echo signals of small targets are weak and difficult to capture and identify. Moreover, some targets may adopt noise - reduction measures, increasing the difficulty of detection. For instance, the low - radiation characteristics of silent submarines make sonar detection challenging.

Existing technologies have limitations in terms of resolution, detection range, and real - time performance. Traditional sonars, for example, have difficulty achieving both wide - range search and high - resolution imaging simultaneously. The data processing speed also restricts the real - time monitoring ability, making it impossible to quickly and accurately analyze a large amount of echo data.

2. Corebai' Solution

In the face of the challenges of complex environmental interference, target characteristic differences, and technical limitations in sonar detectors, Corebai actively responds by launching the following products to strongly support the performance improvement of sonar detectors.

 Amp (Operational Amplifier): Operational amplifiers play a crucial role in sonar detectors. They can amplify the weak signals received by the sonar, enhancing the signal strength for subsequent processing.

 ADC (High - Precision Analog - to - Digital Converter): ADCs are indispensable in sonar detectors. The sound wave signals received by sonar detectors are continuous analog signals, and ADCs can convert these analog signals into digital signals. Digital signals are more convenient for subsequent processing, storage, and analysis by digital circuits, greatly improving the accuracy and stability of signal processing.

The following is the application block diagram of the sonar detector:

Recommended Amp: CBM8656;
Recommended ADC: CBM79AD60G;

Corebai has launched the following products for this sonar detector solution:
The CBM8656 is an operational amplifier with the following characteristic parameter advantages:

 Low Noise: When the input signal frequency is 10kHz, the noise is only 2.7nV/√Hz. It performs excellently in applications with high requirements for signal purity, such as audio processing and sensor signal amplification.

 High DC Precision: It can achieve high DC precision. For applications such as data acquisition, process control, and PLL filters, it ensures the accuracy and reliability of data.

 Low Distortion: The total harmonic distortion plus noise (THD + N) is only 0.0007%. It hardly introduces additional distortion when amplifying signals and can maintain the original quality of the signals.

 Rail - to - Rail Input and Output: As a voltage - feedback rail - to - rail input and output precision operational amplifier, it can process signals close to the power supply rails, improving the dynamic range and signal processing ability.

 Low Offset Voltage Drift: The typical offset voltage drift is 0.4 µV/°C, and the maximum value is 2.3µV/°C. It can maintain stable performance in a changing temperature environment.

 Large Bandwidth: The gain - bandwidth product is 28MHz, and the conversion rate is 11V/μs. It can quickly respond to signal changes.

 Strong Temperature Adaptability: The rated temperature range is from - 40°C to + 125°C. It can work stably in various harsh environments and is suitable for fields such as automotive electronics and industrial control.

The CBM79AD60G is a high - precision ADC with the following characteristic parameter advantages:

 High Resolution: As an 18 - bit analog - to - digital converter, it can provide high - precision analog - to - digital conversion with extremely small quantization errors. It performs outstandingly in fields with high - precision requirements, such as medical equipment and precision instruments.

 High - Speed Sampling Rate: The sampling rate is as high as 5MSPS. It can quickly respond to changes in input signals, is suitable for high - speed data acquisition and real - time signal processing, ensures no data loss, and improves processing efficiency and real - time performance.

 Low - Power Design: The total power consumption is only 64.5mW, which helps reduce system energy consumption. It has obvious advantages in portable devices and battery - powered applications. With low heat generation, it can improve the stability and reliability of the system.

 Built - in Conversion Clock Generation Circuit: It reduces the need for external components, simplifies the system design, reduces costs and complexity. At the same time, it ensures the provision of a stable clock signal, thus guaranteeing the accuracy and consistency of analog - to - digital conversion.

 Error Correction Circuit: It can automatically correct conversion errors, further improving the conversion accuracy and enhancing the system reliability. It enables stable operation even under less - than - ideal working conditions.

 Good AC and DC Characteristics: It has a dynamic range of 100dB, a signal - to - noise ratio of 99dB, a spurious - free dynamic range of 115dB, and a total harmonic distortion of - 117dB. Coupled with small linear and differential errors, it ensures high - quality signal conversion.

 Wide Differential Analog Input Range: It allows any input range within ±VREF. The maximum value of VREF is 5V, and the typical value is 4.096V - 5V. It can flexibly adapt to different input signals.

 Small Package and Strong Versatility: It adopts a QFN - 32(5x5) small package, saving space and facilitating integration. It can be widely applied in fields such as communications, industrial control, and medical equipment. Users can also configure it flexibly according to requirements.

3. Application Scenarios

Relying on its profound professional technical R & D strength, Corebai has carefully launched a series of electronic products. These products not only have strong performance but also excellent adaptability, playing a crucial role in many fields such as underwater rescue, underwater engineering, and underwater scientific research.

 Underwater Rescue Field: In underwater rescue operations, sonar detectors can be used to search for the location of drowning victims, divers, and other underwater personnel. By emitting sound waves and receiving the reflected waves, information such as the position and state of the trapped persons can be determined, providing important support for rescue operations.

 Underwater Engineering Field: When constructing underwater infrastructure such as bridges, tunnels, and ports, sonar detectors can be used to detect underwater terrain, geological conditions, and obstacles, providing accurate data support for engineering design and construction, thus ensuring the safety and smooth progress of the project.

 Scientific Research Field: Marine biologists use sonar to study the behavior and ecological habits of marine mammals such as dolphins and whales. By analyzing the sound wave signals they emit, information such as their activity patterns, group structures, and migration routes can be understood. In addition, sonar technology can also be used to study other biological and abiotic processes in the ocean.