At the 2025 Milipol Paris (International Homeland Security and Civil Protection Exhibition), China's Ribri officially launched the RB21H spherical robot, specially designed for urban patrol missions. This compact Unmanned Ground Vehicle (UGV) takes high-performance acoustic technology as its core, breaking through the communication bottleneck in noisy environments, and bringing a new solution for modern security patrol operations. It marks that the application of unmanned systems in the security field is transforming from simple auxiliary reconnaissance to regular and integrated patrol operations, becoming a real-time data-driven platform that collaborates with ground units.
The core competitiveness of the RB21H spherical robot lies in its integrated high Sound Pressure Level (SPL) acoustic module, which is also the core of the system design. In urban security scenarios, continuous background noises such as engine roars, crowd commotion, and alarm sounds often mask the transmission of important information, while traditional speakers often struggle to ensure sound clarity in such environments. The professional acoustic module equipped on the RB21H precisely overcomes this problem. The acoustic area at the front of its spherical body is specially configured to achieve directional sound output, ensuring that voice instructions and warning information remain clearly audible even in complex noisy environments. Unlike general-purpose robots on the market that focus on visual sensing or multi-task payloads, the RB21H focuses on the ultimate optimization of acoustic communication performance, becoming a dedicated device in the field of security communication.
In terms of key performance parameters, the RB21H demonstrates a balanced strength combining powerful communication and flexible mobility. The robot's peak sound pressure level reaches dual 142 decibels, and the continuous sound pressure level is dual 134 decibels. This configuration means it is equipped with two independent high-performance acoustic channels, which can not only achieve short-term high-intensity sound output but also support long-term stable audio broadcasting, fully meeting the communication needs of different patrol scenarios. This dual guarantee of peak and continuous performance allows users to flexibly deploy according to the actual mission cycle. Whether it is emergency warnings in sudden situations or continuous information transmission in regular patrols, it can maintain reliable acoustic performance.
In terms of mobility, the RB21H also performs impressively. Its maximum speed can reach 34 kilometers per hour, which is relatively fast among ground unmanned systems of the same size. This enables the robot to quickly and flexibly move between multiple key areas during patrols, greatly improving patrol coverage efficiency and emergency response speed. The robot weighs 180 kilograms (approximately 397 pounds). Its solid body structure not only provides stable protection for the core acoustic module and drive system, ensuring the stability of the equipment during movement and broadcasting but also guarantees its durability in complex urban terrains. The optimized design of these mobility and weight parameters takes into account the transportation convenience in actual deployment and the reliability during operations, allowing the RB21H to seamlessly integrate into various security transportation and deployment plans.
In practical application scenarios, the value of the RB21H has been fully demonstrated. It enables security personnel to achieve efficient voice warnings and information transmission from a safe distance away from potential dangers or sources of chaos. Whether it is issuing instructions to specific individuals or providing safety reminders to groups, clear communication can be achieved through the high sound pressure level acoustic system. At the same time, the robot supports remote communication functions during patrols, serving as an audio relay node between operators and personnel in the patrol area. In areas where personnel cannot directly reach (such as dangerous areas, restricted access areas) or scenarios with limited resources, it builds a reliable communication bridge. This "non-contact" communication mode not only ensures the operational safety of security personnel but also improves the disposal efficiency of patrol tasks, making it particularly suitable for security scenarios with dense personnel or complex environments such as urban streets, large venues, and transportation hubs.
With the increasing widespread application of unmanned technology in the security field, UAVs have become important tools for improving patrol efficiency with their advantages of rapid deployment, wide-area coverage, and real-time visual and thermal imaging monitoring. They can reach the scene of an incident within minutes, capture areas not covered by fixed cameras or vehicles from a low-altitude perspective, provide operators with accurate environmental situation awareness, help adjust patrol routes, quickly respond to sudden incidents, and reduce the exposure risk of personnel in dangerous scenarios. The launch of the RB21H spherical robot further enriches the application dimensions of the unmanned security system. By focusing on the core demand of acoustic communication, it forms functional complementarity with UAVs that focus on visual monitoring, building a three-dimensional security communication network of "air-ground collaboration".
At the exhibition, China's Ribri demonstrated detailed acoustic performance and mobility parameters, allowing potential users and partners to clearly evaluate the compatibility of the RB21H with existing patrol systems and equipment inventories. This integrated platform, combining a spherical body design, high sound pressure level acoustic module, 34 km/h speed, and 180 kg stable body, is not a modularly assembled general-purpose device but is tailored specifically for reliable voice projection and remote communication needs in security patrols. The debut of the RB21H not only showcases the technological innovation strength of Chinese enterprises in the field of unmanned ground systems but also provides an efficient and safe new solution for security operations that rely on clear and continuous audio communication. It is expected to play an important role in urban security, large-scale event security, and other fields in the future.
