The disruption of deep-sea ocean currents, poor water transparency, limited installation space within the cabin, and signal attenuation in long cables have long been the core challenges hindering underwater robotic exploration operations. Whether it’s internal inspection of hydraulic dams, routine monitoring of seabed oil and gas pipelines, nearshore ecological observation, or underwater archaeological salvage and surveying, equipment must simultaneously possess multiple capabilities: long-distance high-definition imaging, low-latency and stable data transmission, lightweight integration, and intelligent early-warning control. The CM8242 high-definition zoom module from Kaimorui, paired with the CM200Z network encoding control board, forms a complete modular system specifically tailored for ROVs and small AUVs—underwater vehicles. Leveraging hardware-native interface compatibility, specialized underwater imaging algorithms, and a robust encoding and transmission architecture, this solution effectively addresses industry pain points such as blurry imaging, delayed control response, and insufficient scalability in underwater visual equipment, thereby establishing a comprehensive and reliable closed-loop system for underwater visual data acquisition and transmission.

1. CM8242 Starlight-Level Zoom Movement: An Underwater High-Definition Imaging Unit Designed for Complex Aquatic Environments

The CM8242 is a 2-megapixel, 42x optical zoom all-in-one module—core hardware for underwater robots to capture comprehensive underwater imagery. It is perfectly suited to varying lighting conditions in both shallow and deep waters. The module features a 1/2.8-inch progressive-scan CMOS sensor, delivering up to 1920×1080@60fps high-definition video output. Its 7.0–300mm focal length covers both wide-area cruising and close-up inspection needs. With 42x optical zoom combined with 12x digital zoom, the wide-angle end offers a 42° horizontal field of view, enabling rapid scanning of the entire seabed and the overall layout of pipelines. At the telephoto end, a narrow 1.0° field of view precisely captures cracks on pipe walls, subtle damage to dam structures, and intricate textures of underwater archaeological sites. For deep-sea environments with no visible light, the device achieves a color minimum illumination of 0.05 Lux and a black-and-white mode sensitivity as low as 0.01 Lux. Paired with an ICR infrared filter that automatically switches between day and night modes and 3D noise reduction technology, it effectively reduces image noise caused by suspended sediments and plankton in the water. The signal-to-noise ratio exceeds 52 dB. An electronically adjustable shutter speed ranging from 1/8 to 1/10,000 second allows the device to adapt seamlessly to both strong underwater illumination and extremely low-light deep-sea conditions. The hardware is equipped with a 30-core fine coaxial cable and a dual 36-pin FPC interface, compatible with industry-standard camera control protocols such as SONY VISCA, and can be directly integrated into underwater sealed housings. The entire unit measures 63×72×143.48 mm and weighs just 527 g. Its lightweight design significantly reduces the load on underwater robots, extending their endurance and maneuverability. Operating within a wide temperature range of -10℃ to 60℃, it can handle various aquatic environments, including cold deep seas and hot shallow waters.

2. CM200Z Smart Encoding Control Board: The Underwater Robot’s Image Transmission and Intelligent Control Hub

The CM200Z was specially developed for high-definition integrated modules and serves as the core control platform for underwater robots, enabling video encoding, remote control, and multi-peripheral expansion. It adopts a dual-core 32-bit DSP embedded architecture based on the HI3516D, paired with a 16M FLASH memory and 2G DDR3 RAM. It features hardware encoding support for both H.264 and H.265 formats, with dynamically adjustable bitrates ranging from 500k to 8Mbps. The device supports simultaneous output of dual streams: the main stream at 1080P for real-time monitoring by the shore-based operator station, and the sub-stream for local storage and remote viewing via mobile devices. This effectively addresses issues such as insufficient bandwidth and image lag or ghosting caused by long umbilical cables in underwater environments. The board’s dual video input interfaces can be directly connected to the CM8242 module and are also compatible with multiple mainstream high-definition modules. It integrates a 100-Mbps RJ45 network port and supports various common network protocols including ONVIF, RTSP, and GB28181, allowing underwater exploration footage to be synchronously uploaded to a shore-based monitoring platform. Equipped with dual control serial ports—RS485 and TTL—it enables remote synchronization and control of the module’s zoom, aperture, and focus functions, and seamlessly integrates with underwater pan-tilt units and robotic arms. A single bidirectional audio interface facilitates underwater sound pickup and shore-based remote intercom, making it easy for operators to communicate in real time and record underwater acoustic data. Standard-equipped with a TF card slot that supports up to 128G of local storage, the device automatically saves exploration footage even when disconnected from the network. The USB expansion port allows external connection of Wi-Fi or 4G modules, making it suitable for data transmission from cable-free autonomous underwater vehicles. Featuring two dedicated alarm input/output channels, the device can be linked with motion detection systems to immediately send alert signals to the terminal upon detecting pipeline leaks or underwater foreign objects. With an ultra-thin form factor measuring just 48×48×9mm and weighing only 15.8g, the device operates at low power consumption (DC12V) and includes built-in protection against lightning strikes, electrostatic discharge, and reverse polarity connections. It can be compactly installed within confined, sealed underwater compartments.

3. Modular Integration and Collaborative Adaptation: Addressing the Pain Points of Underwater Robot Integration in a Targeted Manner

The CM8242 imaging module is natively compatible with the CM200Z encoding board, eliminating the need for additional adapter accessories. This significantly simplifies cabling within the underwater housing, reduces the risk of water ingress at cable connectors and signal loss, and enhances the sealing reliability of underwater equipment. The entire module set shares a unified VISCA control protocol, allowing for onshore operation.The operator’s control commands are synchronously transmitted to the core unit, ensuring zero-latency response for zoom and focus adjustments. During fine underwater inspections conducted by robotic arms, the video feed seamlessly follows the movements, capturing every critical detail without any loss. The image noise-reduction algorithm works in tandem with advanced encoding and compression techniques, enabling the system to preserve subtle textures—such as cracks and rust— even at low bitrates, thus preventing crucial underwater detection information from being lost due to compression. This lightweight modular solution is compatible with a wide range of underwater equipment: it can easily be integrated into small observation ROVs, miniature pipeline inspection robots, and research-oriented AUVs—all without requiring modifications to the original equipment structure, thereby significantly reducing integration and retrofitting costs for manufacturers. In real-world applications—including dam inspections in reservoirs, subsea pipeline surveys, and nearshore coral reef research—this complete modular system has demonstrated stable operation at depths of up to 100 meters. Even in completely dark environments, it can clearly identify defects down to the millimeter level. Moreover, during extended underwater missions, the system remains free from overheating or connection failures, and it consistently captures standardized inspection footage, providing comprehensive visual data support for project acceptance and marine scientific research.

4. Implementing all-scenario underwater operations to empower the upgrade of the marine intelligent equipment industry.

Kaimorui’s complete visual module suite covers three major application areas for underwater robots: industrial maintenance, marine scientific research, and underwater archaeology. In industrial maintenance scenarios, ROVs equipped with these modules conduct long-distance inspections of subsea oil and gas pipelines, using telephoto lenses to precisely locate even the tiniest leaks and synchronizing real-time video feeds with offshore operation platforms. In hydraulic infrastructure maintenance scenarios, underwater robots—leveraging a super-long 42x zoom—remotely detect concrete cracks inside dam structures and corrosion on gate mechanisms, replacing human divers and thereby mitigating safety risks associated with deep-water operations. In marine scientific research scenarios, autonomous AUVs outfitted with the full module suite carry out observations of deep-sea organisms and hydrothermal vent formations, using starlight-level imaging to faithfully reproduce the pristine appearance of lightless seabed environments. In underwater archaeological scenarios, the equipment clearly captures details of shipwreck components and submerged cultural relics, preserving high-precision visual data for future reference. The product comes with a comprehensive SDK development kit, enabling equipment manufacturers to perform secondary development, customize features, and adapt protocols, while accommodating both standardized mass-produced devices and specialized custom-built underwater exploration equipment. Relying on mature mechanical core components and advanced coding control technologies, Kaimorui offers a one-stop deep-sea visual solution featuring four core advantages—high-definition imaging, stable transmission, lightweight integration, and intelligent early warning—providing underwater robot manufacturers with a complete end-to-end solution that helps propel China’s marine and underwater equipment into a new era of high precision, intelligence, and long-term stability.