Two Axis Electro Optical Infrared Sensor

Two Axis Electro Optical Infrared Sensor

Military electro optical infrared sensor (EO/IR) technologies are rapidly evolving for airborne intelligence, surveillance and reconnaissance (ISR).two axis electro optical infrared sensor These sensors detect, track, identify, and classify threats during day or night and through otherwise obscuring atmospheric conditions. EO/IR systems incorporate multiple cameras and spectrometers for imaging across the electromagnetic spectrum. They also use advanced computer software to analyze target signatures based on size, movement, and optical characteristics. The result is improved detection, tracking, and identification, even in cluttered or congested environments.

Unlike active radar, which emits and reflects a beam of radiation toward targets, EO/IR technology passively senses the radiant energy emitted or reflected by a target’s surface. This technology requires no radar signals and does not disturb the environment. EO/IR systems can be used to detect anti-ship cruise missiles, fast attack craft and unmanned aerial vehicles, among other potential threats.

To detect a target, the EO/IR sensor must have high contrast between its image and the background. All objects with a higher temperature than absolute zero will radiate in the infrared spectrum, and a thermal imager can distinguish these objects by their distinct radiant patterns from the background. The contrast between a target and its environment can be positive, negative, or zero, with positive being the most distinct and enabling the best recognition.

A two axis electro optical infrared sensor is a complex electronic system with photoelectric, mechanical and control modules. The mechatronics control mode is adopted to stabilize the aiming axis. Two-axis scanning mirror assemblies (TSAY) have large angular range, dynamic characteristics and small mirror surface distortion. They are often installed on platforms that vibrate during flight, so they must also be capable of robust vibration tolerance. To guarantee a stable performance under vibration, a novel structural topology optimization method is used to reduce the moment of inertia while maintaining mirror surface flatness.

Due to errors in parts manufacturing, assembly, sensors, calibration, and more, there are some random measurement errors in the target image. To eliminate these errors and improve the accuracy of the target, a target compensation and correction algorithm is designed. It combines least squares, adaptive Kalman filter, and radial basis function neural network to achieve this.

The smallest tactical-grade two-axis rate sensor in Northrop Grumman’s portfolio, the LRS-2003 is ideal for platform and gimbal stabilization; electro-optical/infrared camera, radar, and gun and turret stabilization; and remote weapons stations on helicopters, torpedoes, and ground vehicles. It is a rugged, compact solution that delivers the highest level of precision, performance and reliability for a wide range of applications.

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