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Development and Research of Intelligent Ultrasonic Heat Meter

Author: YaoBinBin
Tutor: ZhangHongJianï¼›ZhouHongLiang
School: Zhejiang University
Course: Detection Technology and Automation
Keywords: Calorimeter Ultrasonic wave TDC-GP21 Time difference method Flow Zero drift
CLC: TH81
Type: Master's thesis
Year: 2012
Downloads: 106
Quote: 0
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Abstract


Calorimeter is used to measure the heating system and a key instrument of release or absorb heat energy flow through the heat exchange system . With the full implementation of the national heating household metering and charging system , the development and application of heat meters in China will be the formation of the large-scale structure of the industry , has a very broad market prospects . The traditional mechanical Calorimeter there , can not fully meet the market demand for a series of problems of high water quality requirements , pressure loss , mechanical devices easy to wear , and poor anti-interference ability . With the development of modern ultrasonic detection technology , ultrasonic heat meters in the country has been more and more research and application . There is no doubt that the ultrasonic heat meters where future Calorimeter trends . Domestic production ultrasonic heat meter run stability and measurement accuracy , there are some shortcomings to be further studied and improved . In order to analyze the the inadequacies reasons ultrasonic heat meter measurements exist , on the basis of broad access to the Calorimeter related domestic and foreign literature , combined with ultrasonic heat meter works and design procedures , the paper developed a transit-time measurement principles and TDC-GP21 measurement chip smart ultrasonic heat meters . Problems exist for ultrasonic heat meters , the design of experiments carried out in-depth research . The main characteristics of this paper are as follows : (1) processing software to optimize flow measurement procedures to improve the accuracy of flow measurement . The influence of temperature on ultrasonic flow measurement software correction . (2) from the ultrasonic transducer matching experiments found that using paired ultrasonic transducer can be reduced ultrasonic transducer structure itself is brought to an ultrasonic signal measurement error , improve the measurement accuracy . Zero drift problems from ultrasonic calorimeter traffic measurement experimental study found that the ultrasonic transducer is an important factor leading to measurement zero value exists . Ultrasonic transducer performance directly affect to the the calorimeter measurement accuracy .

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CLC: > Industrial Technology > Machinery and Instrument Industry > Instruments, meters > Thermal measuring instruments
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