| With《Study of an Integrated Cooler-heater Machine Driven by Solar Energy & Natural gas》item supported by Science and Technology Foundation of ShenZhen city, Diffusion-absorption refrigerating machine was studied based on virtual instruments technology. To solve environmental problem brought by Air-conditioners, we researched a diffusion-absorption refrigeration machine drived by complex energy resource, especially the energy in lower degree.Perfect and reliable data was necessary to study performance of the integrated cooler-heater machine, so we built a powerful data measurement system using virtual instruments on platform of LabVIEW. Characteristics of this system were the follows:1) It built on LabVIEW sofware and some correlative hardware, and the following data was also treated by the software, so it eased system constructions.2) Several parameters could effectively measure, analyze and diagnose on real time such as temperature, flow rate, pressure, liquid level and so on in the refrigerating machine. The system also decreased effect caused by environment interference and system error because signal was transported in digital signal and data was treated by software. It also decreased hardware constructions in mesurement system.3) It had friendly human-machine interface because measurement result was displayed on the computer in form of charts or graphs in LabVIEW.The result showed the system had many advantages, such as friendly human-machine interface, good precision, fast reaction time, good real-time performance and comprehensive functions of data treatment and analysis. It can fulfill demand of user. The system also could help us to get optimal control discipline of the diffusion-absorption refrigeration machine. |
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