Multi-channel thermal imaging and television complex search-detection with noise-tolerant high-speed data transmission interface
Multi-channel infrared and visual complex with robust high-speed data transmission interface was developed using the physical and informational integration of thermal and visual channels (TC and VC respectively). Two variants of structural and functional organizations of the complex, which are based on Gigabit Ethernet or on multi-channel video interfaces that use special serializer-deserializer ICs and permits robust and fast transmission (1-3.3) Gbit/s on distances from 15 m up to 100 m were proposed. New calculation methods of energy and spatial separation for TC and VC of the complex were developed. These methods use the criteria of energy separation and the noise equivalent luminance difference between the object and background NELD(R) for VC, and the noise equivalent temperature difference NELDc(R) for TC, which allowed to develop of the new technique of maximum distance estimation for various objects. Four-component zoom-afocal cap for thermal imager was developed. Optical system structure, which provides simultaneous surveillance in visual and infrared bands, and ensures specified VC and TC field of views was suggested. Software and hardware components for the complex prototype with robust high-speed data transmission interface that uses serializer-deserializer ICs and enables video source channel multiplexing were developed. The prototype of the GigE Vision compatible camera without the per-frame buffering that provides transmission of video with 1920×1080 pixels resolution in YUV 4:2:2 format and 25 Hz frame-rate was designed. The recommendations for distance increasing of video stream transmission up to (50-120) m (depending on the carrier medium) for serializer deserializer based complex variant without the duplex mode but preserving the channel throughput at 1.5 Gbit/s were developed.