Recently, a major explosion occurred at a fireworks manufacturing company in Liuyang City, Changsha, Hunan Province. The accident site featured overlapping flames and explosions, with exposed steel bars and scattered gunpowder scattered throughout the ruins. Despite the complex rescue conditions, a coordinated human-machine rescue operation was successfully carried out. The most notable contributors were several four-legged robotic dogs, which navigated skillfully through the collapsed structures. Utilizing their inertial navigation systems, they accurately located trapped individuals amidst the thick smoke and transmitted real-time fire point coordinates, securing critical time for the rescue efforts.

From Ruins to the Streets: Robotic Dogs Are Taking Over Every Aspect

In recent years, the applications of robotic dogs have been expanding at an astonishing pace from laboratories to every aspect of the real world.

In the fields of industrial inspection and security, vast and hazardous areas such as petrochemical plants, underground utility tunnels, substations, and port terminals are increasingly being automated with robotic dogs instead of manual labor. At a major refinery, the deployment of 12 quadruped robots has eliminated the need for workers to trek dozens of kilometers daily to conduct inspections in high-risk environments.

In the specialized domain, CCTV publicly released for the first time in 2026 footage of China's robotic wolf packs engaging in street combat. The latest generation of robotic wolves can carry miniature combat equipment, achieve a maximum speed of 15 kilometers per hour, and are equipped with a high-precision inertial navigation system that ensures stable posture and direction even when satellite signals are interrupted, maintaining their combat formation.

In the fields of intelligent logistics, agricultural surveying, and public welfare, Shandong Taishan's "Intelligent porter" robotic dog can climb mountains, traverse water obstacles, and navigate through barriers, even carrying heavy loads on 45-degree slopes. Gaode Map has launched "Tutu," the world's first fully autonomous, embodied quadruped robot designed for open environments, which assists visually impaired individuals in avoiding obstacles and navigating through crowds on urban roads.

The Challenge of Precise Control in Robotic Dogs: Where Does Balance Come From?

The "motion control" of robotic dogs is extremely challenging. Despite their "low chassis and short legs," quadruped robots must respond to sudden disturbances (such as being kicked, encountering abrupt slope changes, or colliding with obstacles) during high-speed movement while rapidly restoring balance. This requires the control system to detect bodily changes within milliseconds and promptly calculate the required torque output from each joint to mitigate the impact.

This perception phase is precisely the mission of the Inertial Measurement Unit (IMU).

The IMU functions like a "cerebellum" —it continuously monitors the body's acceleration and angular velocity in three-dimensional space. If the robotic dog suddenly tilts to the left, the IMU will promptly notify the main control chip at an ultra-high frequency: "I am yawing, the roll angle has changed, and the angular velocity is abnormal." The main control chip immediately commands the motor on the left leg to exert force, propelling the body back to balance.

So, what kind of IMU can meet the requirements for large-scale, all-weather, and high-intensity applications of robotic dogs? Four essential conditions are indispensable: miniaturization and lightweight design; high stability; high reliability; and high data refresh rate.

LINS313 by LINS Technology: A cutting-edge solution tailored for the "cerebellum" of robotic dogs

Amidst such a multitude of stringent requirements, among various inertial sensor solutions, one product has been specifically designed for high-performance quadruped robot applications—the LINS313, a high-precision inertial measurement unit from LINS Technology.

• LINS313 Technical Specifications

Six-axis full integration: A 3-axis gyroscope and 3-axis accelerometer with an output frequency of 200 Hz, supporting up to 1000 Hz, fully meeting the data refresh requirements for high-speed motion control of robotic dogs.

Extravagantly high zero-bias instability: The gyroscope exhibits only 2°/h, while the accelerometer measures merely 20 μg (Allan variance). Even without external references, the robotic dog maintains stable orientation over extended periods.

Accurate measurement range: The gyroscope has a range of ±500°/s, and the accelerometer measures up to ±16g, enabling precise capture of various motion patterns—from rapid turns to vertical jumps—by the robotic dog.

Compact, lightweight, and low-power: Measuring just 22.4×22.4×9.3mm with a weight under 15g and a power consumption as low as 0.5W, it saves energy and occupies minimal space within the narrow body of the robotic dog.

Robust reliability: Withstanding impacts of 1000g/0.5ms and random vibrations of 6.06g across the frequency range of 20–2000Hz; operating temperature range covers-40°C to +80°C, ensuring stable data output whether in northern icy conditions, southern scorching heat, high-temperature industrial inspection workshops, or harsh outdoor rescue environments with severe cold and snow.

High-precision inertial navigation propels sensing equipment toward the future

Looking back at the explosive growth of the quadruped robot industry in recent years, it essentially represents a co-evolution of "perception and control." In this industrial transformation, inertial navigation technology—serving as the indispensable "cerebellum" for robotic dogs—is becoming the core driving force behind its widespread application.

LINS Technology has been deeply engaged in the inertial navigation field for years. Its flagship product, the LINS313 high-precision inertial measurement unit, delivers precise, stable, and compact core advantages that provide robust technical support for the development of quadruped robot applications. The company has actively contributed to and witnessed the integration of inertial navigation technology into increasingly sophisticated intelligent sensing systems, ultimately transforming human lifestyles in the future.