Design And Development Of Virtual Multi-channel Instrument For Temperature Measurement

Temperature measurement predominates an important position in agriculture, industry and scientific research. And it is very pivotal for temperature measurement that the instrument for temperature measurement has an outstanding performance.So it is very necessary to exploit a high-powered instrument for temperature measurement. In this paper the development and status in quo about temperature measuring technologies and instruments for temperature measurement are fist summarized, and the characteristics and localizations of the current hardware-based instrument for temperature measurement are also pointed out; And then we take the thermocouple and thermo-resistance instrument for temperature measurement as the example to analyze the most representative temperature measurement and the principle of instrument, including the temperature measuring mechanism, physical structure and notices; An advanced manufacture technology of instrument---virtual instrument technology and the virtual instrument based on which are introduced in succession. This paper also narrates at length the origin, characteristics and system structure. The virtual instrument and hardware-based instrument are contrasted, which stands out the superiority of virtual instrument; Finally we combine virtual instrument and the technology of temperature measurement, which comes into being the virtual multi-channel instrument for temperature measurement debated in detail in this paper.In the paper we amply introduce the logical structure and design of software and hardware of the virtual multi-channel instrument system for temperature measurement. Applying the Object Oriented Programming(OOP) method, center control module,transmitter demarcating module, channels and scopes module, data collection and process module, data analyze module, data display module, data redisplay module, print module and the other auxiliary functions are designed, which realize the collection, process, analyze and display of the powerful virtual instrument. The experiments show that the virtual temperature measurement instrument has a wile scope and flexible temperature measuring mode. If users choose the right sensors, they can get the temperature from 0 to 1000℃, and the precision is rather high. It can not only analyze the data online but also process them offline, which all shows the powerful life force of virtual instrument and the new method of temperature measuring. The further development of the measurement instrument for temperature field measuring anddistributing network measuring is finally discussed.Prof. Shuren Qin advocates that virtual instrument should be made in our country, which induces me to attempt to develop a virtual multi-channel instrument for temperature measurement, and it is completed successfully in this paper.