Figure 13 shows the original shape peak signal of detecting roller. The channels covered by the strip have stable sensitive peak signals which are almost free from outside noises. The signals of other channels are clean and have no zero-drift phenomenon. It is the basis of the shape detecting system to correctly detect the cold strip shape in the industrial production. Figure 14 shows real-time typical shape (edge wave, middle wave and good shape), which truly reflects actual shape status of online strip. For example of some steel coil, product specification is 0.6 mm × 1 090 mm, material is ST12, and rolling speed is 600 m/min. Figure 15 shows lateral distributions of strip shape, where the largest shape  Fig. 14 Actual shape statuses of industry: (a) Edge wave;    (b) Middle wave; (c) Good shape   Fig. 15 Lateral distribution of measured strip shape  deviation is 20 I under the open loop shape control, and  6 I under the close-loop shape control. Figure 16 shows the longitudinal distributions of strip shape. Before the close-loop shape control applied, only pre-setting (open-loop) works, so the shape values have large fluctuations and poor stability. After the close- loop shape control applied, the shape deviations are controlled within 6 I effectively and steadily.   Fig. 16 Longitudinal distribution of strip shape  8 Conclusions  1) The innovative structure of internal shape detecting roller could ensure accuracy and stability of shape signal, and have many good features to meet the industrial requirements, such as high rigidity, good wear resistance, avoiding scratching the strip surface and long service period. 2) The embeded DSP shape signal processing board has high processing speed of shape signal, good anti-interference  ability and reliability, powerful comprehensive compensation ability. The shape detecting precision reaches 0.2 I. 3) The close-loop shape control precision is within 6 I. It is suitable to the technological transformation and equipment upgrading of steel, aluminum, copper and other old or new cold rolling strip mills.  References  [1]  XU Le-jiang. Shape control and mill type selection of cold mill strip [M]. Beijing: Metallurgical Industry Press, 2007: 100−124. [2]  WANG Guo-dong. Shape control and shape theory [M]. Beijing: Metallurgical Industry Press, 1986: 41−97. [3]  LIAN Jia-chuang, LIU Hong-min. Control of strip thickness and shape [M]. Beijing: Enginery Industry Publishing Company, 1996: 10−49. [4]  WANG Jun-sheng, BAI Jin-lan, LIU Xiang-hua. Theory and process control of cold strip rolling [M]. Beijing: Science Press, 2009: 1−25. [5]  YANG Li-hong, YAN Fei, MA Zhao-hui. Research and development of pre-coated steel for automotive industry [J]. Iron and Steel, 2009, 44(12): 1−7. [6]  ZHAI Bo, SUN Rong-sheng, SUN Jian-lin. Application of sheet shape control technology on continuous rolling mills in Angang [J]. Aisc Techniques, 2009, 355(1): 49−52. [7]  HU Guo-dong, WANG Qi, ZOU Ben-you. Differential output shape meter of mageto-elastic transformer for cold rolling strip [J]. Iron and Steel, 1994, 29(4): 56−59. [8]  XU Shi-min, YU Bing-qiang, HU Guo-dong. Shape meter of pressing magnetic type for cold rolling strip to applicating 4-roller reversible rolling mill [J]. Metallurgical Equipment, 2004, 147(5): 39−40. [9]  ZHAO Qi-lin, WANG Jun-sheng, WANG Guo-dong. Development and application of a measured flatness value processing method [J]. Journal of Materials and Metallurgy, 2009, 8(4): 294−296. [10]  WANG Jun-sheng, JIANG Zheng-yi. A flying gauge change model in tandem cold strip mill [J]. Journal of Materials Processing Technology, 2008, 201(1/2/3): 152−161. [11]  LIU Jian, WANG Yi-qun, HU Xiao-jun. Dynamic calibration of pneumatic strip shape measuring rolls and phase correction compensation method of system circumferential error [J]. Steel Rolling, 2009, 26(1): 26−29. [12]  SUN Xu-guang, WANG Yi-qun, YIN Guo-fang. Main technical performance of pneumatic strip shape measuring roll [J]. Journal of Iron and Steel Research, 2006, 18(12): 47−49. [13]  LIU Hong-min, DING Kai-rong, LI Xing-dong. Theoretical computational method of shape standard curve [J]. Chinese Journal of Mechanical Engineering, 2008, 44(8): 137−142. [14]  LIU Hong-min, HE Hai-tao, SHAN Xiu-ying. Flatness control based on dynamic effective matrix for cold strip mills [J]. Chinese Journal of Mechanical Engineering, 2009, 22(2): 287−296. [15]  SUN Ya-bo, LIU Hong-min, PENG Yan. Influence of variation of the on_line shape of cold rolled strip on shape measuring and controlling system and its compensating measures [C]// Proceedings of Second International Conference on Modeling and Simulation. Liverpool, UK, 2009: 212−219. [16]  YU Bing-qiang, LIU Hong-min, YANG Li-po. A new type of contact shape meter and its industry application [C]// International Conference on Measuring Technology and Mechatronics Automation (ICMTMA2009). Zhangjiajie, China, 2009: 1058−1061. [17]  LI Zhi-ming, PENG Yan, YU Bing-qiang. A shape measurement system for cold-rolled steel strip based on DSP [C]// 2009 WASE International Conference on Information Engineering. Dalian, China, 2009: 257−260. [18]  LIU Hong-min, YANG Li-po, YU Bing-qiang. Entire-inlayed- block- intelligence-type shape meter [P]. Chinese Patent: CN101694368A, 2010−04−07. (in Chinese) [19]  YU Bing-qiang, YANG Li-po, LIU Hong-min. Development and industry application of contact shape meter with new structure [J]. Chinese Journal of Scientific Instrument, 2010, 31(4): 904−911. (Edited by DENG Lü-xiang)    冷轧带钢的工业形状检测系统英文文献和中文翻译(4):http://www.751com.cn/fanyi/lunwen_63130.html