Acoustic velocimetry SF6 gas leakage monitoring and warning system

A gas leakage, monitoring and alarming technology, applied in the direction of detecting the occurrence of fluid at the leakage point, using sonic/ultrasonic/infrasonic waves for material analysis, measuring devices, etc. On-line detection and other problems, to meet the needs of the on-site environment, the influence of environmental factors is small, and the detection reliability is improved.

Inactive Publication Date: 2009-11-25
JIANGSU NARI TURBOSTAR ELECTRIC
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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 t

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  • Acoustic velocimetry SF6 gas leakage monitoring and warning system

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[0009] exist figure 1 Among them, the present invention is a kind of sonic velocimetry SF6 gas leak monitoring and warning system, and it comprises signal collector, A / D converter 5, system main frame 1 and peripheral equipment, the input terminal of signal collector and A / D converter 5 connection, the signal collector is an ultrasonic signal collector 2, which is provided with a collection cavity, an ultrasonic generator is installed at one end of the collection cavity, and the other end is an ultrasonic receiver, and the ultrasonic receiver measures from the transmitting end of the ultrasonic generator to the ultrasonic receiving The time interval experienced by the receiving end of the device, the time interval signal is collected, and the output end of the A / D converter 5 adopts the RS-485 field bus 6 to connect with the system host 1, and the interval signal is transmitted to after being converted by the A / D converter 5 System host 1, after processing, the system host 1 o...

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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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Application Information

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IPC IPC(8): G01M3/24G01N29/024
Inventor 许锦喜吴玉华李庆华王书建
Owner JIANGSU NARI TURBOSTAR ELECTRIC
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