Study On Non-uniform Motion Energy Harvesting Technology Of Printing Equipment

At present,the printing industry is being developed towards the intelligentize direction,and the micro-electro-mechanical system(MEMS)sensor is the core of intelligent development,while power supply for MEMS sensor is an urgent matter to be solved in the process of application,and the research of vibration generation in the printing equipment field is still blank.Collecting energy from the environment to power MEMS is the focus of current research.There are many non-uniform motion energy loss in printing equipment.If the energy is collected to power the MEMS sensor in the printing equipment,it can effectively improve the intelligence of the printing equipment and reduce the cost and energy consumption of laying special power supply lines for the sensor.However,so far,there has not been any domestic or foreign scholars specializing in this field.Based on this,the mechanism of non-uniform motion and energy collection technology of printing equipment were studied in this paper,and the main contents of the paper are as follows:(1)Firstly,the necessity of this research topic was analyzed,and the current research situation of non-uniform motion in the field of printing equipment was summarized,and the advantages and disadvantages of piezoelectric,electromagnetic,electrostatic and composite energy collection methods were compared,and the process of piezoelectric energy collection was briefly analyzed.(2)Several mathematical modeling methods of voltage energy collection were analyzed,and the electromechanical coupling modeling process of the cantilever beam piezoelectric energy collector was deduced in detail.The static,dynamic and output voltage characteristics of the cantilever beam piezoelectric energy collector were analyzed with ANSYS,then the modal mode of the energy collector was obtained.(3)The eccentricity model of cylinder of printing color group was established for the first time,and the influence of cylinder on printing quality was analyzed,then the influence of roller shaft deviation on printing inking was analyzed quantitatively.In addition,the mechanism of non-uniform motion of the cylinder and the feeder of the printing equipment was analyzed,and the non-uniform motion characteristics were obtained,providing technical support for the design of energy collector.(4)A cantilever beam piezoelectric energy collector with adjustable frequency bandwidth was developed.A test platform for printing equipment energy collector was created.The designed piezoelectric energy collector was tested,and the output voltage regulation and resonance frequency of the energy collector were studied,then the voltage output law at different excitation frequency was obtained: the output voltage was 7.3 V at the point of 12 Hz,and the output voltage was up to 8.6 V under the impulse excitation,and the load resistance had less influence on the frequency of the output voltage.(5)The best matching method of piezoelectric energy collection and natural frequency of printing assembly is presented.Taking the feeder test platform for printing equipment as an example,the designed piezoelectric energy collector was installed on the feeder wallboard,and its actual voltage output was tested to reach 12.7 V.The test results showed that the designed energy collector could supply MEMS sensor.