SPYROMETER
The SPYROMETER III is a special high-temperature camera system, which combines video imaging with infrared pyrometry. It is designed to provide continuous monitoring of the internal processes in rotary kilns and great cooler, combustion chambers in incineration furnaces etc.
Imaging pyrometry is the combination of colour video imaging and a computer-driven two-colour scanning pyrometer that measures the temperatures of certain zones (selected by the operator) within the image viewed on the monitor screen. By means of the SPYROMETER, the operator knows exactly where the temperature measurements are being taken.
The SPYROMETER optical objective is housed in a lens tube, which is cooled and permits insertion in the kiln or cooler. The objective is covered by a virtually scratchproof sapphire window providing maximum protection from the high heat environment. The air-purged lens fits through the refractory wall to provide the maximum viewing field, even in locations where access is limited. Lens tubes with different fields of view and with different viewing options such as "straight view" and "45˚ oblique angle" are available. The stainless steel lens construction promotes long life durability and low maintenance.
Inside the SPYROMETER head, the captured optical image is passed through a beam splitter that separates the visible portion of the signal from the infrared (IR) signal. The visible portion is passed to a solid-state CCD colour camera and the IR signal is transmitted to a scanning pyrometer. The video image from the camera and the data from the IR detectors are transmitted on a video cable to an image processor located close to the control room. The SPYROMETER head also includes all the electronics for the pyrometer positioning and signal conditioning. A microprocessor in the head acquires the raw data from the pyrometer, calculates the temperatures and transmits the information to the image processor via the video cable.
The new SPYROMETER III image processor exist in two versions either a DUAL channel processor, which is common for two SPYROMETER cameras, or a SINGLE channel processor, for one stand alone SPYROMETER camera. Inside the SPYROMETER image processor, the video signals are digitized and graphics elements (like cursors that define the measurement zones and the temperature displays) are overlaid. The resulting image can be viewed on a SVGA monitor, one for each camera. The operator is able to change the set-up of the SPYROMETER via a standard keyboard & mouse connected directly to the image processor. The DUAL channel image processor provides 16 rectangular temperature measurement zones (TMZ's), which are constantly monitored. These 16 TMZ's are connected to 16 channels of 4-20 mA analogue outputs. The DUAL channel image processor provides 32 TMZ's in total, but still only 16 of these TMZ's are connected to the analogue outputs. The SINGLE channel image processor provides 8 rectangular temperature measurement zones (TMZ's), which are constantly monitored. These 8 TMZ's are connected to 8 channels of 4-20 mA analogue outputs. The SINGLE channel image processor provides 16 TMZ's in total, but still only 8 of these TMZ's are connected to the analogue outputs.
The SPYROMETER camera can operate in very high ambient loads by the use of cooling purge air to the lens tube and to the camera housing. The cooling air must be continued as long as the lens and camera is exposed to the high temperatures. The housing design incorporates an aluminium outer shell with foam insulation on all sides. This construction gives the enclosure many times the heat resistance of all-metal housings. For extra cooling efficiency, the rear end of the housing is fitted with a VORTEX air-purge cooler.
In order to protect the lens and the camera from the most severe heat in case of a cooling purge air loss or a power loss, the camera is mounted on a Pneumatic Automatic Retract Mechanism. When activated, compressed air stored in a reservoir with check valve will retract lens and camera and give the operator time to arrive at the location and manually remove the camera completely.
The FLSmidth experience in the Cement Industries, have resulted in our special redesign of the standard equipment, the heat and the very dusty environment there is around the Kiln - Cooler is not sodden for standard equipment and the requirement for 24 hours a day 7 days a week.