Acoustic velocimetry SF6 gas leakage monitoring and warning system

Abstract

The invention discloses an acoustic velocimetry SF6 gas leakage monitoring and warning system, a signal collector is connected with input terminal of A / D converter (5), output terminal of the A / D converter (5) is connected with mainframe (1), output terminal of the mainframe (1) are conected with peripheral equipment respectively, signals collected by the signal collector is converted by the A / D converter (5) and then converts the analog signals into digit signals and uploading to the mainframe (1), which proceedes analysis, comparison and judgement to the digital signals and proceedes corresponding processing program to operate the peripheral equipments. The invention also discloses an acoustic velocimetry SF6 gas leakage monitoring and warning and processing method, first transmits time interval signals fo collecting ultrasonic transmission to the mainframe (1), obtains concentration signal gas in the collection chamber after processing, then the mainframe (1) judges each data exceeding standard or not.

Description

technical field [0001] The invention relates to a monitoring and alarm system for SF6 gas leakage by the sonic velocity measurement method. Background technique [0002] At present, the detection of SF6 concentration mostly adopts sensor detection method, discharge method, ultraviolet ionization method, infrared imaging method, laser detection and other methods. , and convert it into different pulse current signals to detect the concentration of SF6. Due to the influence of other halogen gases in the environment, false alarms are prone to occur; (2) The discharge method indirectly judges whether SF6 leaks by detecting the content of sulfur dioxide , the accuracy is not high, it is greatly affected by the environment, often false alarms, and the service life is short; the ultraviolet ionization method irradiates SF6 gas with ultraviolet rays to ionize the gas, and then measures the ion amount to reflect the SF6 concentration. The detection accuracy is high, but the service li...

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Problems solved by technology

[0002] At present, the detection of SF6 concentration mostly adopts sensor detection method, discharge method, ultraviolet ionization method, infrared imaging method, laser detection and other methods. , and convert it into different pulse current signals to detect the concentration of SF6. Due to the influence of other halogen gases in the environment, false alarms are prone to occur; (2) The discharge method indirectly judges whether SF6 leaks by detecting the content of sulfur dioxide , the accuracy is not high, it is greatly affected by the environment, often false alarms, and the service life is short; the ultraviolet ionization method irradiates SF6 gas with ultraviolet rays to ionize the gas, and then measures the ion amount to reflect the SF6 concentration. The detection accuracy is high, but the service life Only 500 hours, unstable, not suitable for on-line detection; (3) Infrared imaging technology detection, through infrared radiation to act on the leak point, use infrared imaging technology to observe gas disturbance on the display, to judge whether there is leakage, can be remotely detected Contact detection, but it is expensive and cannot achieve quantitative detection; laser detection technology uses laser spectral absorption technology to detect SF6 gas leaks, because optical devices are used, the price is expensive, and optical devices have high requirements for use and are easily damaged

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