Based on the communication network Direct3D visual simulation engine design and implementationtheVisual Simulation (Visual Simulation) is used to realize 3 d space information visualization technology， it has a realistic Simulation effect and convenient operation method， can well satisfy the new plane avionics system design This paper designs and realizes an Direct3D based on the communication network visual simulation First， in this paper the characteristics of the visual simulation and the programming essentials Direct3D brief analysis of selection， and expounds the main reason for the Direct3D Secondly， put forward the visual simulation software， the total design project of the simulation software program and the software module partition the working process of the analysis of the various modules， explore the main functions and the relations among And then， based on the communication network of Direct3D visual simulation is the key technology of engine are analyzed and the study， introduces solutions discrete event simulation， Direct3D resource management and animation optimization and the mouse control technology， the key technology of the Finally， this essay discusses the Direct3D based on the communication network visual simulation software realization method， and in a more complex switched communication network as an example， the visual simulation， and the performance of the program was tested
Abstract Non-electrical signal to the sensor signals into the circuit a total follow-up measurement and analysis， measurement and control system is an indispensable component， it is the nature of various non-electrical signal conversion and signal mutual In the monitoring and control system， the quality and characteristics of the sensor affect the performance of the entire Temperature measurement in the area of negative temperature coefficient (NTC) thermistor in its response has been fast and wide measurement range， the advantages of cheap occupy certain market However， different series of thermistor resistance difference between the thermistor and the same series of individual differences seriously affect the actual use of the Subject to the single-chip microcomputer as the core design of AVR NTC temperature characteristics tester， in the design of high-precision temperature sensor PT100 thermal resistance of the heating environment in which real-time accurate measurement， the use of constant current source circuit as a sensor drive circuit， through the TLC2543 to be the temperature of high-speed data At the same time bridge the use of constant current source of the resistance of the thermistor measured the output signal through the bridge with the PGA-type △ ∑ A / D converter AD7705 is converted to digital From these single-chip temperature， the corresponding value recorded and the data sent through the serial port to the PC， in this way to measure the temperature characteristics of Key words: SCM; PT100; constant current source bridge; resistance measurement
Non-electrical signal to the sensor signals into the circuit a total follow-up measurement and analysis， measurement and control system is an indispensable component， it is the nature of various non-electrical signal conversion and signal mutual In the monitoring and control system， the quality and characteristics of the sensor affect the performance of the entire Temperature measurement in the area of negative temperature coefficient (NTC) thermistor in its response has been fast and wide measurement range， the advantages of cheap occupy certain market However， different series of thermistor resistance difference between the thermistor and the same series of individual differences seriously affect the actual use of the Subject to the single-chip microcomputer as the core design of AVR NTC temperature characteristics tester， in the design of high-precision temperature sensor PT100 thermal resistance of the heating environment in which real-time accurate measurement， the use of constant current source circuit as a sensor drive circuit， through the TLC2543 to be the temperature of high-speed data At the same time bridge the use of constant current source of the resistance of the thermistor measured the output signal through the bridge with the PGA-type △ ∑ A / D converter AD7705 is converted to digital From these single-chip temperature， the corresponding value recorded and the data sent through the serial port to the PC， in this way to measure the temperature characteristics of thermistor
