During the operation of the cold-rolling set, the vibrations will cause ripples on the steel plate, which will have bad influence on the product quality. Given to this，the author developed a monitoring and alarm system on cold-rolling set vibration condition, in order to alarm timely and record the positions of vibration marks when it occurs the marks during the operation of rolling. According to the testing object, determined that cold-rolling machines’ vibration data, rolling-speed data, rolling-distance data and cut-information should be acquired, then built the system. After setting the sampling and alarm parameters, it acquires vibration date, rolling-speed data and rolling-distance data. According to the speed, it divides the vibration data into three parts, low frequency part, middle frequency part and high frequency part, count them and then compare the results with their corresponding alarm data to judge whether them exceed the standard. If some machine in some frequency exceeds the standard, it will record the alarm data, which includes the machine number, frequency range and position. The original data and statistical data files name after the cold-roll number, it saves the alarm data if there is alarm data. After tested for a long time, the system could monitor vibration state of cold-rolling machines effectively.
