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Changsha, China

Peng X.,CentralSouthUniversity | Peng X.,HunanFirstNormalUniversity | Yan J.,CentralSouthUniversity | Sun Y.,CentralSouthUniversity
Chinese Journal of Sensors and Actuators | Year: 2010

This paper describes the design of a high-temperature field measuring instrumentation, which is composed of an optical lens, a color CCD camera, an image grabbing card, a computer and associated measuring software. Based on the two-color thermometry, the temperature distribution of the measured obj'ect can be calculated and then displayed on the screen. A method of automatically adjusting the amount of light is used to expand temperature measuring range of CCD, and blackbody furnace calibration experiments are adopted to calibrate the measurement errors caused by the non-ideal spectrum response character of CCD image sensor. Finally, an attenuation equalizer of radiation is built to compensate measuring temperature errors caused by smog interference. By testing on the industrial field, the maximum absolute error is 13. 6 K, and the maximum relative error is 1.42% , the average computing time of each piece of radiation image is about 0. 127 seconds. The test indicates that the measuring instrumentation meets the high-temperature detecting requirements of industrial production due to its high accuracy and reliability. Source

Chen X.,CentralSouthUniversity | Gao G.,CentralSouthUniversity | Dong H.,CentralSouthUniversity | Li J.,CentralSouthUniversity
Thin-Walled Structures | Year: 2016

Based on the splitting and bending of a steel plate, a new type of energy absorption structure is presented in the paper. The absorber consists of a steel plate, die, and support tool. During collision, the steel plate is split and bent by the die. Using this type of absorber, energy absorption occurs through the splitting of the steel plate, elastic-plastic bending, and friction between the steel plate and the die. Two kinds of steel plates with different thicknesses are constructed and tested. The experimental results show that the deformation of the steel plates is stable. The grooves on the end of the steel plate effectively eliminate the initial peak of the force. This combined method performs energy absorption effectively. The energy absorption responses of the structure are also analysed using the finite element method. By comparison with the experimental results, the numerical results are validated. © 2015 Elsevier Ltd. All rights reserved. Source

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