Application MEMS multi-sensors for monitoring the forming load of stamping press

The current paper discusses the measure methods and presents the application of acceleration sensors in a stamping press tonnage load monitoring. The forming force is proportion to the distortion of press stressed components, and it can be calculated with double integral from the acceleration signals. Multi-sensors of MEMS are used to obtain the relative signals between the frame body and bottom die base in X, Y and Z-axes directions. Based the acceleration signals, the stages of press stamping process can be distinguished clearly due to the relation tie up the forming force change. The paper introduces a measurement value of the maximum relative distortion and load, then discusses the reasons of error bring in experiments. A principle is proposed to correct the integral results and the experiments prove that the method is doable and the results deviation can be held in an acceptable accuracy limit.