| With the increasing awareness of environmental protection, demand of theelectric heating film keeps increasing, the security assurance of the electric heatingfilm are also increasingly subject to the attention of electric film productioncompanies. However, due to complexity of electric heating film structure, it leads tothe requisite of testing more parameters and high precision of estimate. Thetraditional detection method of the electric heating film are artificial samplinginspection, for this reason, it can not be guaranteed with the product qualification ofeach electric heating film. Traditional detection method can not satisfy therequirements of production enterprises, the digitalize and intelligentialize of electricheating film detection is the inevitable trend of development. This article is focusedon the detecting instrument of electric heating film, can achieve the function withaccurate examination, including power leakage current and insulation resistance,with the purpose of settling a dispute which the existing artificial detection has a lowmeasuring precision, a big error and a complicated operation, improving productionefficiency and cutting the cost.Based on the above actual background, this article introduces relevant conceptsof electric heating film, the developmental status of electric heating film detectionand technical requirement of detecting instrument. Through an theoretical researchand analysis, the auxiliary platform which is provided by the company, the designuses the Omron CP1H series PLC as the core of GJS-1electrothermal mulchintegrated detection station, the Omron touch screen as the display device, theSTM32microcontroller as the core of the data acquisition and processing. Theproject includes the design of the detection module hardware which involves thepower, the leakage current and the insulation, and the design of softwareprogramming of CP1H and STM32. Refer to the requirements for the detectionaccuracy, a digital filter of STM32is designed out. The data transmission method uses the serial data transfer with CP1H and STM32, by the serial communicationprotocol based on the MODBUS protocol.This topic is based on the PLC electric heating film comprehensive screeningtest which Zhonghui Floor Heating Commissions our school to research anddevelopment. The test bench has low cost, strong function, easy to operate andaccurately measure the quality parameters of electric heating film. It lays a solidfoundation which goes towards digital, intelligent test development. |
