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Closed-loop control based on virtual instrument design precision range finder

Displacement measurement accuracy. 32 virtual range finder software development software is the core of the virtual instrument, which controls the instrument's measurement accuracy and the related initial setup,tory burch, requiring a high enough real-time control. Most modern virtual instrument design based on VXI bus, VXI-based software development, there are two: First, the general application development languages, such as VC, VB, C + +, Builder, etc. The second is dedicated virtual instrument development software tools. Such as the influx of NI measurement and test the operation 2001 ・ №. 5 companies LabVIEw and LabWindows,tory burch shoes, HP company VEE,ugg italia, TIG, TektmniX company & a Test, Tek-TNS and so on. The system selected LabVIEW graphical programming language, which is equipped with a wealth of digital signal processing toolbox to support the DLL, and DDE, the design of most programs call the LabVIEW development environment directly in the library (that is, the icon / connector), while the few sub-functions such as the interface card driver, linear non-linear compensation inductosyn, the use of Bor. 1andC + + development tools to write. The system processes the test driver shown in Figure 3. In the soft front panel, select the test method, enter the appropriate parameters, to meet the requirements prompted by the limited range, the mechanical slider to set the scheduled move, the computer background operation processing, the dynamic description of the display window and display real-time location of stroke, can save this test data. After repeated tests related error calculated. Figure 3 Virtual shake l Tester 3.3 Test flowchart software virtual instrument panel design, the traditional instrument panel on the screen of computer software used to generate the soft front panel instead. Soft panel provides a graphical user interface, provide a major test, measurement functions. Virtual instrument panel is the user used to operate equipment and instruments for communication, input parameters and output results of the user interface. Soft panel composed by a large number of virtual controls, the system has four libraries. Library, including various switches, knobs, dials, lights, headers, and other digital graphics. Users can design their own definition of a transfer from the gallery functional graphics (control) and put them together organically, you can form a variety of instruments required; data library, signal analysis and processing can be error handling; equipment information database, the name of the apparatus, hardware information, software information. With the mouse or keyboard operator to simulate the operation of conventional instruments,tory burch sale, showing some of the results can be shown to achieve human-computer dialogue. Precision rangefinder virtual closed-loop control panel design in LabVIEW software development environment, a three-module design panel. Control Module: Set of 5 action buttons, can be back to the place, run, read, control and communication channel selection control operation; set the module: You can use the keyboard and mouse to any set position, speed and direction and other parameters, the test operation time. Positive and negative by the panel selector switch controls the stepper motor to run 'to that slide back and forth to Taiwan. Buttons control the motor from the frequency speed. Divided into 1 to 9; display module: the virtual panel can display the current state of micrometer. Including displacement, sliding mobile direction and speed, with repeated measurement of standard deviation can be calculated; and virtual panel display window in the dynamic process can be directly simulated distance, type run, micrometer control the distance set by , direction and speed of walking, running to automatically shut down when the set distance. 4 Conclusion The virtual instrument for the mechanical parameters of the measurement and control technology designed to provide a good way. Because it is based on computer technology, so the virtual instrument with a powerful data processing capabilities and high flexibility, simple programming environment can support a variety of measurement and control system to achieve a number of functions and intelligent instruments. It is a powerful data analysis, processing, representation and exchange function, can effectively assist in the analysis results, the implementation of instrument control. The precision micrometer and virtual instrument technology have developed a fully integrated closed-loop control of the precision range finder. The software features a flexible hardware instead of curing,ugg boots günstig, the range finder features, greatly improved flexibility and automation. Therefore, the displacement measuring instrument has a broad application prospects. Reference to the text more [1] Wang Ru-cylinder. Virtual instrument of a new era of instrument development [J】. China Instrument. 1997 (5) [2] solution Ming Fang, Wang Hong Yu virtual instrument, instrument technology [J】 1998 (5) [3】 Liu Weiling other half in the virtual instrument platform Kejian plastic film thickness measurement and control system environment [J】 Chinese machine vent works. 2o00 (3) [4] Cai Jincheng and so on. Pc system to achieve virtual instrument technology [J】. Sichuan University (Natural Science). 1999 (1) day

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