<title>Concept of multisensor industrial thermal imaging system</title>

Abstract

This paper describes the development and system integration of a non-cooled industrial thermal imaging system (ITIS) based on an uncooled linear array 1 X 128 pyroelectric detectors and internal scanner and the concept of multisensor industrial thermal imaging system for inspection/monitoring thermal processes or hazardous environments. In previous time, as first step, was developed a thermal imaging system in which was a two dimensional capability is reached with mounting of the camera on the precise programmable positional unit that exhibits positioning capability in 2 D.o.F. (degree of freedom). As a second stage of a developing an industrial thermal imaging system was mechanical design and construction of an internal scanner for linear array. Internal scanner has ability to create two-dimensional frame with selectable numbers of rows (from 1 to 128). Frame rate is depending on a numbers of rows in a frame (from 128 Hz to 1 Hz) and software averaging. The measured NETD of a thermal imaging system, without frame averaging, is better than 0.5 degrees Celsius (for lens with F equals 0.7 at 300 K). The digital part of a camera is equipped with 32 bit floating point digital signal processor (SHARC, Analog Devices), fieldbus controller (COM20020, SMCS, with implemented low-level protocol ARCNET ANSI ATA 878.1 with data rate 5 Mbit per second) and fieldbus interfaces (for twisted pair and coaxial cable). The positional unit was also attached with fieldbus controller. This paper also deals with a conceptual design of a multi- sensor and multi-actuator system based on a ARCNET Local Area Networks (LAN) with set of nodes like thermal or visible cameras, positional units and other necessary nodes.