Design And Implementation Of Data Processing System About Ultrasonic Heat Meter’s Flow Curve

In recent years With the country’s energy conservation requirements, our winter heating when the original charges by way of housing area becomes full implementation in accordance with the metering and charging way; in domestic traditional mechanical heat meters and ultrasonic heat meter Both use the table with the measurement of heat, but mechanical heat meter due to the presence of mechanical parts, pressure loss, the pressure is not conducive to the balance of the entire supply network; and after a long run more serious wear and tear, the late measurement inaccurate. Ultrasonic heat meter pressure loss is small, wear long-running case does not exist, but for accurate measurement demanding; want to design a high-performance ultrasonic heat meter to meet the needs of the market, echoing the response of energy frugality.At present, some domestic manufacturers of ultrasonic heat meter and focus only on the immediate interests of the number of products, do not pay attention to the quality of ultrasound waves heat meters; when that full implementation of the national compulsory metering charges, most manufacturers of ultrasonic heat meter can not meet national metrology requirements suffered a heavy blow; heat meter arrives at the factory to test the local metrology institute, the only national standard three-point detection, evaluation forms are only tested five points, but Yasumasa accuracy under several test points, and can not ensure the accuracy of the whole flow range. According to statistics in 2013 after a period of operation at the site calorimeter measurement accuracy to meet the requirements of the heat meter is only 10%.To solve these problems of the present system to design a high reliability, high stability, high-quality ultrasound heat meter flow curve processing system. The system has sensors, embedded hardware, embedded software, etc., through the flow curve fitting, amendments designed to meet the final design of ultrasonic heat meter flow curves at different temperatures over the full flow range flow error of accuracy processing system.For the heat meter flow curve processing system focuses on the one hand to support the principles of flow measurement curve data processing and hardware design presentation, on the other hand describes the ultrasonic heat meter entire software design flow curve of the design and optimization, and phase at different temperature Comparative analysis of contrast flow error correction, verification; and the overall test of the entire system.Within the error range of tried and tested through the flow curve improved flow errors at different temperatures and different flow points were required, and the ratio of the national standard in the range of 80% error range. Within and after the corrected heat meter heat meters in 2014 to participate in the General Assembly, after three months of testing the durability of this section ultrasonic heat meter is still required in the European standard error.