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Methane leakage detection device

A leak detection device, methane technology, applied in the pipeline system, mechanical equipment, gas/liquid distribution and storage, etc., can solve the problem of manual inspection of toxic gas violations, huge inspection workload, and difficulty in meeting the needs of rapid detection, etc. question

Active Publication Date: 2013-01-30
HENAN HANWEI ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the continuous development of the national economy, the demand for gas in industry, urban construction, and residents' life is also increasing, and the safe operation of urban gas has become increasingly important; how to strengthen the management of gas safety and prevent accidents before they happen is the key to gas The primary problem of the management of the transmission and distribution pipeline network; however, the current inspection system of the gas pipeline network needs to detect the gas concentration through a manually carried detector, the inspection workload is huge, and the manual inspection is easily damaged by toxic gases
[0003] In the prior art, FID is a gas chromatographic detection instrument sensitive to hydrocarbon gases, which is widely used in the detection of volatile hydrocarbons and many carbon-containing compounds; traditional FID needs a built-in gas pump, and needs to carry consumables such as carrier gas , although the detection speed is faster than manual detectors, it is still difficult to meet the needs of rapid detection

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Such as figure 1 As shown, a methane leakage detection device includes a microprocessor circuit, a signal generating circuit, a laser, a sensor, a receiving signal processing circuit, a display circuit and a power supply circuit, wherein the sensor includes a laser signal receiver; the The signal generation circuit comprises a ramp wave generation circuit, a sine wave generation circuit and an adder, and the output terminals of the ramp wave generation circuit and the sine wave generation circuit are respectively connected to the input ends of the adder; the receiving signal processing circuit includes A lock-in amplifying circuit, a filter circuit and an analog-to-digital conversion circuit connected in sequence; the microprocessor circuit is respectively connected to the input terminals of the ramp generation circuit and the sine wave generation circuit to provide a signal source, and the adder The output end is connected to the control end of the laser, and the laser...

Embodiment 2

[0042] The difference between this embodiment and Embodiment 1 is that the sensor also includes a laser emitter, and the laser emitter is a fiber optic collimator; the laser emitting end of the laser is connected to the laser emitter through an optical fiber, so The laser emitting end of the laser transmitter is arranged to align with the signal detection end of the laser signal receiver; the laser transmitter and the laser signal receiver of the sensor are respectively installed at the two ends of the vehicle-mounted support rod;

[0043] The laser light emitted by the laser is connected to the fiber collimator through the optical fiber, and the fiber collimator emits the laser light into the air; after the laser light emitted from the fiber collimator passes through the air, the laser received by the laser signal receiver contains the air The concentration information of the gas in the laser signal receiver is converted into a current signal by the photodiode of the laser sig...

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Abstract

The invention provides a methane leakage detection device. The detection device provided by the invention comprises a microprocessor circuit, an oblique wave generating circuit, a sine wave generating circuit, a summator, a laser, a sensor, a phase lock amplifying circuit, a filter circuit and an analog-digital conversion circuit, wherein the phase lock amplifying circuit, the filter circuit and the analog-digital conversion circuit are successively connected; the sensor comprises a laser signal receiver, and the output ends of the oblique wave generating circuit and the sine wave generating circuit are respectively connected with the input end of the summator; the microprocessor circuit is respectively connected with the oblique wave generating circuit and the sine wave generating circuit, and the output end of the summator is connected with the control end of the laser; the laser shot end of the laser is aligned with the laser signal receiver, and the output end of the laser signal receiver is connected with the input end of the phase lock amplifying circuit; and the microprocessor circuit is electrically connected with the reference signal input end of the phase lock amplifyingcircuit, and the analog-digital conversion circuit is connected with the microprocessor circuit and used for providing the detection data. The detection device provided by the invention has the advantages of high sensitivity, strong anti-interference capability, rapid reaction rate and less danger.

Description

technical field [0001] The invention relates to a gas concentration detection instrument, in particular to a methane leakage detection device. Background technique [0002] With the continuous development of the national economy, the demand for gas in industry, urban construction, and residents' life is also increasing, and the safe operation of urban gas has become increasingly important; how to strengthen the management of gas safety and prevent accidents before they happen is the key to gas The primary problem of the management of the transmission and distribution pipeline network; however, the current inspection system of the gas pipeline network needs to detect the gas concentration through a manually carried detector. The inspection workload is huge, and the manual inspection is easily damaged by toxic gases. [0003] In the prior art, FID is a gas chromatographic detection instrument sensitive to hydrocarbon gases, which is widely used in the detection of volatile hyd...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F17D5/06
Inventor 尚中锋王书潜陈海永杨清永祁泽刚张青云
Owner HENAN HANWEI ELECTRONICS