Study On Testing System For New Flow Sensor On Basis Of DASYLab

Testing technology is a part of experimental science and mainly researches the principles of the various physical quantity and processing methods of signal measurement.As a new testing and instrumentation technology,Virtual Instrumentation with designated software achieves the full functionality of instrumentation in the general hardware platform and through different software modules it can realize the combination of multi-purpose instrument.In this paper,to aim at dealing with the existing problems in our hydraulic system we will develop a testing system for a new MEMS flow sensor to implement dynamic data collection and processing.Finally the system has the ability of real time monitor.In testing System signal is the cartier of information.Signal analysis and processing is the way of obtaining the information.Therefore summarizing the signal in testing system and analyzing the knowledge of signal analysis and processing such as fourier series,frequency spectrum of periodic signal and nonperiodic signal,fourier transform,FFT,sampling theorem and signal filtering.All of these are to lay theoretical basis for system development.Hardware is the primary means of getting signal.In view of the hardware for the test,mainly describing the test system hardware including the test stand,axial plunger pump,pressure sensor and transducer with display instrument,turbine flowmeter,the new sensor and WaveBook.As the same time analyzing their principles and characteristics for data collection.Software is the key of designing testing system.Considering the software for the test,firstly introducing the software DASYLab and its modules,features and window components.According to the requirements of test,analyzing the corresponding modules,constructing signal flow chart,forming the test system modules,and at last designing a personalized testing system interface.Meanwhile coming up with the method of commission for the system.Finally experimenting with the new sensor for calibration tests and manipulating data with EXCEL,obtaining performance curve which is associated with the configuration parameters of the new sensor.Through the dynamic flow tests,proving that the new sensor has a high Frequency Response.As the same time,the test results are important guiding significance for flow simulation of the axial piston pump in recent years.