High temperature gas flow measurement standard device and its detection method
A standard device and flow measurement technology, which is applied in the field of high-temperature gas flow measurement standard device and its detection, can solve the problems affecting the measurement results of the flowmeter, the expansion of metal parts in the flowmeter, and the increase of sensor error, etc., to achieve comprehensive and accurate calibration Effect
Active Publication Date: 2018-03-20
CHINA JILIANG UNIV
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However, in some actual production occasions, the temperature of the gas medium measured by the gas flowmeter is high, and the ambient temperature of the flowmeter is higher than normal temperature. The change of the measurement medium temperature and the working environment temperature will cause the metal parts in the flowmeter to expand, Due to the large sensor error and other problems, the performance parameters calibrated by the flowmeter at room temperature are no longer suitable for high-temperature occasions, which directly affect the measurement results of the flowmeter. Therefore, a standard device that can calibrate the working characteristics of the flowmeter under high-temperature gas is needed
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[0024] The present invention will be further described below in conjunction with the accompanying drawings.
[0025] Such as figure 1 As shown, the control system of the present invention is composed of an upper computer part, a lower computer part, a data acquisition part and an actuator part. Described upper computer is PC, adopts LabVIEW software to write control program, can set temperature value, flow value in man-machine interaction interface, control device operation and stop, upper computer realizes the reception of data with lower computer through Ethernet protocol, According to the measured data, a verification report for the flowmeter to be tested can be generated. The lower computer part includes programmable controller PLC, AD module and DA module. The AD module converts the analog signals output by temperature sensors, pressure sensors, and flow meters into digital signals and transmits them to the programmable controller PLC to realize data collection. The DA...
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The invention relates to a high-temperature gas flow measurement standard device and a detection method thereof. The gas flow standard device of the existing standard meter method seldom considers that the temperature of the gas to be tested is not very high in the actual working place of the meter to be tested, and ignores the response of the gas flowmeter to gases of different temperatures, making the measurement results not very accurate. The present invention includes a flow regulating device, a temperature regulating device, and a flow detecting device. The flow detecting device is installed upstream of the temperature regulating device, the meter to be checked is installed downstream of the temperature regulating device, and the flow regulating device is installed in the overall device. Upstream, positive pressure is used to generate flow. The invention can consider the problem of the gas flowmeter being tested under normal temperature gas and used under high temperature gas, analyzes the working characteristics of the flowmeter at different gas temperatures, evaluates the characteristics of the flowmeter more comprehensively and objectively, and improves the accuracy of measurement results.
Description
technical field [0001] The invention relates to a standard device, in particular to a high-temperature gas flow measurement standard device and a detection method thereof. Background technique [0002] In the process of calibrating the gas flowmeter, the calibration medium usually used is air at normal temperature, and the flowmeter to be tested is in a normal temperature environment. However, in some actual production occasions, the temperature of the gas medium measured by the gas flowmeter is high, and the ambient temperature of the flowmeter is higher than normal temperature. The change of the measurement medium temperature and the working environment temperature will cause the metal parts in the flowmeter to expand, Due to the large sensor error and other problems, the performance parameters calibrated by the flowmeter at room temperature are no longer suitable for high-temperature occasions, which directly affect the measurement results of the flowmeter. Therefore, a s...
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IPC IPC(8): G01F25/00
Inventor 谢代梁朱春缘李文军徐志鹏刘铁军梁晓瑜
Owner CHINA JILIANG UNIV
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