Positioning method based on amplitude attenuation of pressure signals
A pressure signal and amplitude attenuation technology, applied in the processing of the detected response signal, the use of sonic/ultrasonic/infrasonic waves to analyze solids, instruments, etc. The effect of high leakage monitoring efficiency, reduced workload and low false alarm rate
Active Publication Date: 2019-11-12
WEIHAI ZHUOCHENG GAS SAFETY EQUIP CO LTD
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Problems solved by technology
[0005] The present invention aims at the technical problems of many interference factors, easy signal submersion, large amount of data and difficult analysis in the process of monitoring the leakage signal through continuous sound waves in the existing gas pipeline network leakage, and provides a monitoring system that can effectively eliminate active signals and monitor A positioning method based on pressure signal amplitude attenuation with small amount of data, simple analysis and positioning, and high accuracy
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[0058] The present invention will be further described below in conjunction with the examples.
[0059] The pressure regulating device in this embodiment is a pressure regulating valve, however, any other devices that can play the same or similar functions belong to the protection scope of the present invention.
[0060] like Figure 1-2 As mentioned above, the gas pipeline network system includes a medium-pressure gas pipeline 1, a low-pressure gas pipeline 2, a pressure regulating valve 3, a front-end pressure sampling device 4, a rear-end pressure sampling device 5, a calculator 6, and a GPS precise timing device. The pressure sampling device is arranged at the front end of the pressure regulating valve, and the rear end pressure sampling device is arranged at the rear end of the pressure regulating valve. The front-end pressure sampling device is equipped with a front-end pressure transmitter, and the rear-end pressure sampling device is equipped with a rear-end pressure ...
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The invention provides a positioning method based on the amplitude attenuation of pressure signals. According to the positioning method, pressure acquisition devices are arranged in an upstream pipe cavity and a downstream pipe cavity of a pressure regulating device correspondingly, the upstream pressure acquisition device and the downstream pressure acquisition device are connected to a calculator correspondingly, and a GPS time service device is used for accurately timing the calculator. When a gas consumption low peak is used, Fourier transformation is carried out on the pressure signals ofthe same time window, the signals are analyzed by combining a pressure regulating device state and the typical frequency, the active signals are excluded, and the leakage signals are screened out. The leakage signals are positioned and calculated in a frequency domain by adopting an amplitude attenuation method, and therefore, the technical problems of multiple interference factors, large data amount, difficulty in analysis and low leakage positioning precision in the monitoring process of leakage signals through continuous sound waves in the existing gas pipe network leakage are solved. Thepositioning method can be widely applied to gas pipe network leakage monitoring.
Description
technical field [0001] The invention relates to the technical field of signal positioning, in particular to a positioning method based on pressure signal amplitude attenuation. Background technique [0002] Natural gas is one of the most important clean energy sources for human beings. With the increase of proven reserves and the advancement of mining technology, the use of natural gas is becoming more and more popular. Natural gas is flammable and explosive, and it is also a greenhouse gas. Therefore, the establishment of a real-time A leak monitoring system and a leak early warning mechanism are not only of great safety significance, but also an urgent need for environmental protection. [0003] In the gas pipeline, the pressure regulating device is the middle and low pressure connection point. When the gas flows to this place, a large number of continuous sound wave signals will be generated due to the change of pressure and pipe diameter, and the continuous sound waves c...
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IPC IPC(8): F17D5/00F17D5/06G01N29/46G01N29/04
CPCF17D5/005F17D5/06G01N29/04G01N29/46G01N2291/015G01N2291/262
Inventor 于长松杨浩霖李荣书
Owner WEIHAI ZHUOCHENG GAS SAFETY EQUIP CO LTD