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Two Axis Electro Optical Infrared Sensor
Two Axis Electro Optical Infrared Sensor
The two axis electro optical infrared sensor is widely used on UAVs, and other moving platforms, to complete target search, observation and tracking functions. It adopts a solid spherical turret and four-framework structure, with built-in visible light TV and infrared sensor, as well as gyro stabilizer to eliminate vibration of carrier platform to ensure stable line-of-sight control. It can detect and track ground targets day or night, and provides powerful aiming and tracking function for the drones.
The EO system is one of the most critical components in an aircraft. Its performance is impacted by various factors including environmental interference, battlefield obscurants and optical conditions, so it needs to be tested extensively before deployment in the field. During the design phase, engineers model how the sensor will perform in different environments and use this information to determine if the system is capable of meeting its intended specifications.
During the manufacturing process, EO systems undergo different tests to verify their performance and optimize the performance of optics and imagers. These tests include measuring and mapping distortions to determine how much image correction is needed to deliver a crisp, distortion-free image. For wide field of view (WFOV) sensors, which capture objects or targets over large areas, it is especially important to map the distortion. The resulting distortion data can be used to digitally correct the image and accurately position overlaid symbology.
Advanced EO Systems provides state-of-the-art imaging systems, positioning systems and components for military, airborne and aerospace applications that incorporate infrared and visible light cameras, lasers and rangefinders. Their solutions are used in manned and unmanned aircraft, spacecraft, ships and land-based systems. EO Systems has extensive expertise in optical, image processing and positioning technologies, and works with customers to develop tailored solutions that meet their specific requirements.
Two axis electro optical infrared sensors provide the ability to monitor and track moving targets in real time, enhancing operational effectiveness. By delivering a clear, concise picture of the target, it is possible to improve mission success rates for both manned and unmanned aircraft. The target measurement accuracy is a key indicator for mission success, and therefore requires significant attention in the research and development of electro-optical equipment. In this paper, an active compensation technology for the target measurement error of the two-axis electro-optical device is proposed. First, the various errors that affect the target measurement accuracy are analyzed, and an error transfer model is established. Through simulation analysis, it is found that the target measurement error exhibits a spatial free-form surface with random irregularities. Afterwards, three methods for error compensation or correction are proposed: the LS-based, AKF-based and RBFNN-based error compensation method. Through simulation comparison, it is determined that the RBFNN-based method can more precisely approximate the error space surface, and therefore greatly enhances the target measurement accuracy of the two-axis electro-optical measurement equipment. The experimental results demonstrate the engineering applicability and efficiency of the proposed method. The two-axis electro-optical measurement accuracy can be improved by up to 7% using the RBFNN-based error compensation algorithm.
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