| Industrial controllers play a very important role in the development of modern manufacturing industry.Although the types,functions and applications of modern controllers are different,Although the types,functions,and applications of modern controllers vary,they all depend on the indicators for normal safe operation.The controller is the core part of the industrial production,which is equivalent to the human brain center.The performance of the controller has a crucial influence on industrial production.Therefore,it is very necessary to develop a modern testing system.First,it perfects and perfects the existing testing technology.Second,it upgrades the traditional testing equipment of the production company.Actively adopting intelligent equipment,new processes and new technologies will play a guiding role in the portability and rapidity of modern test systems,and gradually improved a set of standard industry test specifications and basis.First of all,this project uses LabVIEW as the development software and virtual instrument(Virtual Instrument,abbreviated as VI)with the same testing function as the hardware to complete the installation of the input and output interfaces of the signal acquisition module,and finally complete the signal acquisition,measurement and analysis.According to the needs of users,designers develop computer system with good human-machine interaction ability.All testing functions are implemented by developing test software.This system is the controller temperature test system of the industrial injection molding machine,which uses the virtual instrument as the hardware and the LabVIEW as the development software.The system uses an NI PXIe-8840 controller and transmits data to the NI PXIe-8840 controller using the NI PXIe-4357 platinum Thermal Resistance Data acquisition card in slot 4 of the NI PXIe-1087 chassis.At this point,after the completion of the whole test system,the whole test system is calibrated with the method of software.After the calibration is completed,the temperature of the industrial injection molding machine controller is tested and displayed on the back-end interface of LabVIEW,and a real-time data test report is generated.Secondly,the temperature test of this subject includes three categories: temperature on-line test,temperature control accuracy test,and temperature indication accuracy test.Because these three test items have different functions,so they are different in software design or hardware structure.In short,in terms of software,choosing LabVIEW as development tool is not only short development cycle time,but also the best choice for developing measurement or control system.Finally,the test and display results show that the test system has the characteristics of friendly man-machine interface,intuitive,high accuracy and safety and reliability,as well as a powerful data visualization analysis and control instrument capabilities,and it is easy to operate and generate reports on duty.Analyze from the temperature on-line test,temperature control accuracy test and temperature indication test result,and finally select the test result with temperature control accuracy as the data source for the calibration of the industrial injection molding machine controller.The measurement value data of the whole test system is the standard,and the display value on the control screen of the injection molding machine is used as the correction value.In this way,after reading the temperature value on the controller display screen of the injection molding machine,the exact value of the corresponding test collection point can be obtained according to the fitting relationship.Finally,the relationship between the display value and the measured value is obtained by using the principle of data fitting. |
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