Physical chemistry experimental system based-on virtual instrument control tech.

Abstract

A physicochemical experiment system based on virtual instrument control technique is composed of a temp controller on the basis of semiconductor refrigerating technique, a signal processing unit connected via 485 bus to said temp controller, computer and software control system.

Description

(1) Technical field: [0001] The present invention belongs to the automatic control technology for experiments, especially relates to the integration of virtual instrument technology, semiconductor refrigeration, signal conditioning, data analysis and other technologies used in physical and chemical experiment systems into a variety of analytical testing instruments and the completion of various university physical and chemical experiments Physical Chemistry Experiment System. (two) background technology: [0002] The development and application of Virtual Instruments (Virtual Instruments VI) technology originated from the LabVIEW software designed by NI (National Instruments) in 1986. It is an integrated environment based on graphics development, debugging and running programs, and realizes the concept of VI. . Combining the computer's powerful calculation and data processing capabilities with the instrument hardware's measurement and control capabilities not only greatly r...

AI Technical Summary

Problems solved by technology

At present, in the process of physical and chemical experiments, the measurement of various parameters is generally carried out point by point with traditional instruments or more advanced intelligent instruments. It is difficult to collect multiple data parameters at the same time and perform corresponding feedback control. It is obviously difficult to realize the traditional instrument, especially the coordinated and complex measurement and control, but the technology based on virtual instrument can complete this work well and accurately.

[0003] In the current physical and chemical experiment process, each experiment uses a relatively independent set of experimental devices, and the testing methods are relatively backward. For example, traditional glass thermometers or high-precision Beckmann thermometers are generally used for temperature measurement. Students are required to Often observe and record its readings, especially in experiments that require rapid and long-term recording of temperature data in experiments, which affects the observation of the experimental phenomenon itself, thus affecting the experimental effect

In addition, the experimental methods are mostly traditional methods. Each experiment generally uses relatively independent experimental instruments. There is no data communication function between the instruments. The students record the experimental data manually, and then draw the data to analyze the experimental results.

Since the experimental data is manually measured and recorded, the accuracy and reliability of the experimental data cannot be guaranteed, thus affecting the experimental results

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