The Research Of Integrating L-T Table And TRIZ To Search The Coupling Paraneter And Decoupling In Ultrasonic Thickness Measuring Instrument

Function coupling is the important reason for the failure to achieve the function requirement of a system,and parameter coupling is the root reason of functional coupling.Based on the study of the previous parameter decoupling method,this article provides a new method of combining the L-T table and TRIZ theory,and from the perspective of physical parameters to analyze the system,construct the parameters expressing process model of coupling root reason and the system solving process model based on L-T table and TRIZ.In the parameters expressing process model of coupling root reason is mainly include decompose system,construct the substance-filed model of system,construct the physical parameters network and identify the coupling root reason.In the system solving process model based on L-T table and TRIZ is mainly include refine the coupling variable and half-solution variable,apply L-T table to inference decoupling variable,determine the decoupling solution and further determine the ideal solution.Finally,apply the above theory to guide the innovative design of ultrasonic thickness measuring instrument to improve the measurement accuracy of it.The main content of the research can be summarized as the following:1.Construct the physical parameters network.Firstly,decompose the function and structure of the system,and construct the substance-filed model of the subfunctions,then connect the substance-filed model of the subfunctions according to the relationship of function to construct the substance-filed model of the overall system;extract the characteristic physical parameters of the substances and fileds in overall system substance-filed model,and then construct the physical parameters network according to the relationship of in overall system substance-filed model and the relationship of parametric interaction,according to the physical parameters network to identify the coupling root reason.2.Refine the coupling variable,half-solution variable and inference the decoupling variable.Refine the coupling variable and half-solution variable according to the physical parameters network,and apply L-T table to inference decoupling variable.3.Determine the solution of the system.Firstly,determine the real-solution variable from the decoupling variable according to the temporal correlation of the coupling relationship,and according to the real-solution variable determine the decoupling solution;then map the decoupling solution to the functions and physical parameters,and map the functions and physical parameters to the technological evolution routes,through the technical evolution routes to determine the ideal solution.4.The innovative design of the ultrasonic thickness measuring instrument.Design the ultrasonic thickness measuring instrument detailedly in the two aspects of mechanical structure and hardware circuit.Using the method presented in article to analyze the system of the ultrasonic thickness measuring instrument and carry out innovative design in mechanical structure design part,eventually draw up the innovation designing scheme of the ultrasonic thickness measuring instrument;in the hardware circuit design part mainly design the circuit modules,including ultrasonic transmitting circuit,ultrasonic receiving circuit,time counting module,temperature measuring module,clock circuit,memory circuit,actuator drive circuit,keyboard control circuit,liquid crystal display circuit,power circuit,etc.