Natural gas leakage warning monitoring apparatus and method based on optic-fiber FP cavity-type probe

A monitoring device and natural gas technology, which is applied in the measurement of color/spectral characteristics, etc., can solve the problems of increased detection time, unsuitability, and measurement distance of less than 10m, and achieves a high-accuracy detection effect with sufficient laser energy, easy installation, etc. Effect

Pending Publication Date: 2018-09-28
陕西九鑫节能环保有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Moreover, there are handheld methane gas remote detector products using this technology on the market abroad, the sensitivity can reach ppm level, the response time is 0.1s, but the measurement distance is less than 10m
Some extractive combustible gas

Method used

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  • Natural gas leakage warning monitoring apparatus and method based on optic-fiber FP cavity-type probe
  • Natural gas leakage warning monitoring apparatus and method based on optic-fiber FP cavity-type probe
  • Natural gas leakage warning monitoring apparatus and method based on optic-fiber FP cavity-type probe

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] The sensor group 6 adopts 5 groups of sensors arranged in parallel and located at 5 positions respectively.

[0049] Among them such as Figure 8 As shown, the sensor group 6 adopts a FP cavity probe sensor; the FP cavity probe includes an armored optical cable 604, a first mirror 601 and a second mirror 602; as Figure 11 As shown, in the process of use, in order to ensure the tensile capacity and mechanical properties of the optical cable, it is necessary to use an armored optical cable. During processing, the armored optical cable is directly connected to the incident end and the outgoing end. The armored optical cable 604 includes a group of optical fibers 603; one optical fiber 603 is connected to the first mirror 601, and the other optical fiber 603 is connected to the second mirror 602; a group of optical fibers 603 are incident ends and output ends respectively.

[0050] Among them such as image 3 As shown, the laser processing system includes a beam splitte...

Embodiment 2

[0058] The sensor group 6 adopts 5 groups of sensors arranged in parallel and located at 5 positions respectively.

[0059] Among them such as Figure 8 As shown, sensor group 6 adopts FP cavity probe sensor; FP cavity probe includes armored optical cable 604, first mirror 601 and second mirror 602; Armored fiber optic cable is used. During processing, the armored optical cable is directly connected to the incident end and the outgoing end. The armored optical cable 604 includes a group of optical fibers 603; the group of optical fibers 603 are all connected to the second mirror 602; the group of optical fibers 603 are incident ends and output ends respectively.

[0060] Among them such as figure 2 As shown, the laser processing system includes an optical switch 11; the laser 3 transmits the laser light to the optical switch 11 through a circulator 5, and the optical switch 11 allows the laser light to pass through the sensors of five measuring positions in a time-sharing ...

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PUM

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Abstract

The invention discloses a natural gas leakage warning monitoring apparatus based on an optic-fiber FP cavity-type probe, and relates to the technical field of warning monitoring. The apparatus includes a laser device, which is respectively connected with a signal generation module and a laser device driver; the laser device drives a sensor group, wherein conversion and demodulation of signals between the laser device and the sensor group are carried out through a laser processing system; the laser processing system sends the signal, detected by the sensor group, to a photoelectric detector, then the signal is converted into an electric signal thereby; the electric signal is amplified and sent to a data collection module through a pre-amplifier; the data information collected by the data collection module is sent to a control center to process the signal. In the invention, a plurality of sensors are driven by one laser device, so that the apparatus can supply sufficient laser energy, can achieve long-distance detection and multi-point time-sharing measurement; the sensors and transmission signal both belong to optic-fiber medium, so that the apparatus is passive and has intrinsic safety. The apparatus is suitable for flammable and combustible sites, such as petrochemical engineering, due to the whole optic-fiber networking manner.

Description

technical field [0001] The invention belongs to the technical field of early warning and monitoring, and in particular relates to a natural gas leakage early warning and monitoring device based on an optical fiber FP cavity probe, and a natural gas leakage early warning and monitoring method based on an optical fiber FP cavity probe. Background technique [0002] At present, the sensors used for natural gas leakage detection mainly include semiconductor gas sensors, electrochemical gas sensors, solid electrolyte gas sensors, contact combustion gas sensors, etc. These sensors generally have slow response speed and are easily interfered by other gas components. And frequent maintenance, low measurement accuracy and other shortcomings, it is difficult to achieve remote, real-time, online monitoring. The biggest disadvantage of this type of sensor is that it is charged by itself, and there are potential safety hazards when used in special environments such as flammable and explo...

Claims

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Application Information

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IPC IPC(8): G01N21/39
CPCG01N21/39
Inventor 刘延强任波陈晨蒋毅高占胜何东
Owner 陕西九鑫节能环保有限公司
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