Abstract
The roll is necessary and important equipment in aluminum processing, and its surface temperature will change its thermal expansion. The gap shape between rolls will change accordingly, affecting the quality of aluminum products. Therefore, it is important to monitor and control the roll surface temperature. The roller is a highly reflective body that rotates continuously during work. This article proposes an infrared temperature sensor to measure its surface temperature. Through field investigation and a literature review, we know that a roller’s motion will affect the accuracy of its surface temperature measurement. An infrared temperature measurement compensation algorithm based on rotation speed is constructed to eliminate this influence. Experimental results show that this method can make up for the temperature measurement error caused by the change of rotation speed and hence improve measurement accuracy. The algorithm is simple and adaptable and provides a new method to improve the accuracy of temperature measurement given speed change.
Highlights
With the development of electronic science and technology, the traditional contact temperature measurement method has been unable to meet the needs of some fields, and the demand for noncontact, long-distance temperaturemeasurement technology is growing
The analysis shows that when using infrared temperature sensors to measure the temperature of rotating moving bars, the measurement results always deviate from the true value, and the degree of downward deviation gradually increases with increasing rotation speed
We hope that the algorithm can be extended to different kinds of temperature sensors, such as temperature optical fiber sensors
Summary
With the development of electronic science and technology, the traditional contact temperature measurement method has been unable to meet the needs of some fields, and the demand for noncontact, long-distance temperaturemeasurement technology is growing. During the strip rolling process, the heat of the rolled product and that released by its deformation will increase the temperature of the roll and generate thermal convexity along its axial direction. This affects the strip quality; the roll surface is repeatedly exposed to rapid heating and cooling; it is prone to fatigue damage and production accidents [4, 5]. The literature on real-time temperature measurement and control is scarce, and there is little research on the influence of speed condition on the accuracy of infrared temperature
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