46 Measurement and Testing
Advanced Linescanning Solution Provides Real-Time Termal Imaging in Harsh Industrial Environments
Ircon (UK), the brand of choice for rugged, dependable, IR sensors used in harsh, high temperature environments, has introduced the ScanIR3 infrared linescanners and thermal imaging system. The ScanIR3 Series includes a choice of eight models that provide accurate, real-time thermal imaging in a wide variety of industrial applications, including continuous sheet and web-based processes, as well as discrete manufacturing.
Combined with Ircon ScanView Pro software, the ScanIR3 scanner is designed for reliability and continuous operation in harsh industrial environments. Its robust housing incorporates standard water-cooling and air purge, and also features built-in laser sighting. A rugged processor box provides universal input and output (I/O) capabilities in the field without the need for an external computer.
The ScanIR3 linescanner has one of the fastest scan speeds in the industry and offers complete data about even the highest-speed manufacturing processes. Unlike point sensors that measure a single point, the linescanner measures multiple temperature points across a scan line. Its motorised mirror scans at rates up to 150 lines per second, allowing rapid detection of temperature non- uniformities and hot spots. Rotating optics collect infrared radiation at 1024 points within a 90-degree field of view, and industry-leading optical resolution (up to 200:1) enables detection of smaller temperature anomalies. A two- dimensional image is formed as the material moves across the linescanner’s field-of-view.
The ScanIR3 system is exceptionally easy to deploy and manage: a single bundled sensing head cable with a one-click connector to the scanner allows for fast and trouble-free installation. The unit’s processor box supports various industry interfaces, including Ethernet, fiber optics (optional), and analogue/digital I/O.
In addition, the multifunctional ScanView Pro software allows custom
configuration of ScanIR3 operating parameters, and display of thermal images and temperature profiles on a standard personal computer (PC). This enables real-time thermal imaging for temperature monitoring, display and analysis—users can quickly detect a hot spot or non-uniformity before it becomes a problem. The software includes features to subdivide thermal images from the ScanIR3 linescanner into portions of specific interest. Temperatures in each portion can be processed for a certain math function, such as average, maximum, or minimum temperature. In case of a thermal defect, a fail-safe alarm is triggered and logged. The software also includes a movie playback function for stored thermal images.
For interfacing with other control systems, temperatures are available as current or voltage analogue outputs by virtue of the analogue output modules provided as an option with the processor box. No PC is necessary to provide these outputs. It is also possible to output temperature values in a network via an OPC or DDE server. Users can specify security passwords and access levels with multiple language support.
The ScanIR3 linescanner is offered with an optional modular, high-temperature enclosure system specifically designed to protect the scanner from exposure to ambient temperatures up to 1994ºF (1090ºC). While protected in this enclosure, the linescanner can operate comfortably in high- temperature processes, such as those seen in manufacturing steel and other metals, as well as glass and a variety of minerals.
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Materials Oxidation Reaction Testing By Termal Imaging
A new applications report from FLIR Systems (France) details how the Safe Oxygen Working Group at the Federal Institute for Materials Research & Testing (BAM), Berlin, Germany are using a FLIR SC- Series thermal imaging camera to test the reaction of different materials and component designs to oxygen at varying pressures and temperatures.
Pressurised oxygen is widely used in chemical plants, iron ore smelting, hospitals and for scuba diving. However the susceptibility of certain materials and component designs to large quantities of pressurised oxygen is highly unpredictable and can lead to strong reactions resulting in catastrophic failures.
Traditionally BAM had used thermocouple sensors and spot pyrometers to measure temperature. However these methods had limitations, thermocouples can be easily destroyed if there is a strong reaction with oxygen and spot pyrometers measure only temperature at one location. After they invested in a FLIR SC Series thermal imaging camera - BAM researchers have been able to perform non contact temperature measurements using an ‘oxygen pressure shock test’ methodology.
In oxygen pressure shock testing the test material is finely divided to small flakes or grains, put into a stainless-steel container and exposed to the pressurised oxygen. The FLIR SC-Series thermal imaging camera is used to detect the temperature rise on the outer surface of the container. Using the FLIR thermal imaging camera it is possible to detect a temperature rise which involves a chemical reaction of the material with oxygen. Performing these tests at different starting temperatures and at different oxygen pressures, potential reaction thresholds can now be accurately determined by researchers at BAM.
The FLIR SC Series thermal imaging camera used at BAM contains an Indium Antimonide (InSb) Focal Plane Array (FPA) detector providing thermal images at a resolution of 320x240 pixels and a sensitivity of 13mK (0.013 °C). This research grade camera is capable of capturing high contrast thermal images at a frame rate of 432 Hz. For BAM oxygen pressure shock testing requirements, the FLIR SC Series camera was calibrated to accurately measure temperatures as high as 1,800 °C. With its wide temperature range, excellent thermal sensitivity, fast framing capability and user friendly analysis software the FLIR SC Series thermal imaging camera has proven itself is a perfect tool for these safety tests and fulfills all demands of BAM.
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