VOCs gas leakage detection method and system based on optical gas imaging

A gas leak detection and gas imaging technology, applied in fluid tightness testing, machine/structural component testing, measuring devices, etc. High, high false positive rate, high real-time data processing effect

Active Publication Date: 2021-05-11
咏峰(大连)科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods are generally immature, have a high false positive rate and are not very practical

Method used

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  • VOCs gas leakage detection method and system based on optical gas imaging
  • VOCs gas leakage detection method and system based on optical gas imaging
  • VOCs gas leakage detection method and system based on optical gas imaging

Examples

Experimental program
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Embodiment 1

[0057]Such asfigure 1 As shown, this embodiment provides a VOCS gas leak detection method based on optical gas imaging, including the following steps:

[0058]1) Obtain an infrared image of an infrared image of one frame to be detected.

[0059]2) If the frame infrared image is the first frame infrared image, the frame infrared image is used as the background image, and the step 1 is proceeds); otherwise, the process proceeds to step 3).

[0060]3)figure 2 As shown, the background reduction method is used. According to the background image, the dynamic variation region of the current frame infrared image is extracted, and the area of ​​the dynamic variation region (Dynamic variation area f)nThe number of interposed points of less than 255) satisfies the dynamic region detection condition, that is, the area of ​​the dynamic variation region is greater than the area threshold T1, then proceeds to step 4); otherwise, proceed to step 8), where the background deduction method is:

[0061]

[0062]Where...

Embodiment 2

[0089]This embodiment provides a VOCS gas leak detection system based on optical gas imaging, including:

[0090]The image acquisition module is configured to obtain an infrared image of the field to be detected, and if the frame infrared image is the first frame of infrared image, the frame infrared image is used as the background image.

[0091]Background Detection Module for background deduction method, extract the dynamic variation of the current frame infrared image according to the background image.

[0092]The parameter calculation module is configured to calculate the gradation average, gray variance, shape irregularity, and area change rate of the dynamic variation region of the dynamic region detection condition.

[0093]Gas leakage determination module, for determining whether a gas leakage is detected in accordance with a preset counting value and a preset count threshold, depending on the infrared image count value satisfying the detection condition and a preset count threshold.

[00...

Embodiment 3

[0097]This embodiment provides a processing apparatus corresponding to an optical gas-based VOCS gas leak detection method according to the first embodiment, and the processing device can be a processing device for a client, such as a mobile phone, a laptop, a tablet, a desktop. Machine computers, etc. to perform the method of Example 1.

[0098]The processing device includes a processor, a memory, a communication interface, and a bus, a processor, a memory, and a communication interface through a bus connection to complete communication between each other. A computer program that can be run on the processor is stored in the memory. When the processor runs a computer program, performing an optical gas imaging based on an optical gas imaging based on an optical gas imaging in the present embodiment.

[0099]In some implementations, the memory can be a high-speed random access memory (RAM: Random AccessMemory), and may also include non-Volatile memory, such as at least one disk memory.

[0100...

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Abstract

The invention relates to a VOCs gas leakage detection method and system based on optical gas imaging. The system is characterized in that the system comprises: an image collection module which is used for obtaining a frame of infrared image of a to-be-detected region, wherein if the frame of infrared image is a first frame of infrared image, the frame of infrared image is used as a background image; a background subtraction module used for extracting a dynamic change area of the current frame of infrared image; a parameter calculation module used for calculating parameters of the dynamic change area meeting the dynamic area detection conditions; a gas leakage judgment module used for judging whether gas leakage occurs or not when the calculated parameters of the infrared image meet the detection conditions; an alarm module used for outputting an alarm signal when gas leakage occurs and marking the extracted dynamic change area; and an image fusion module used for fusing the current frame of infrared image with the original background image to generate a new background image when the calculated parameters of the infrared image do not meet the detection conditions. The method and the system can be widely applied to the field of volatile organic compound leakage detection.

Description

Technical field[0001]The present invention relates to a VOCS (volatile organism) gas leak detection method and system based on optical gas imaging, belonging to the field of volatile organic substance leak detection.Background technique[0002]Petroleum refining is a high-risk industry, the raw materials or products of petrochemical enterprises are mostly volatile and easy to flammab, and they are more complex, and there are many production equipment, and it is easy to happen to the leakage of flammable and explosive gases. The accident, and the fire accident of petrochemical companies is often accompanied by explosion, with strong stereoscopic, easy-to-fire reconciliation, and the consequences are more serious. Therefore, petrochemical companies have always been the key object of safe production prevention in various countries. It requires real-time monitoring of their production environment for safety grades. At present, petroleum refining companies generally install a combustible g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M3/00G06T7/00G06T7/11G06T7/136G06T7/194G06T7/62
CPCG01M3/002G06T7/0004G06T7/11G06T7/136G06T7/194G06T7/62G06T2207/10016G06T2207/10048G06T2207/20221
Inventor 汪洋胡英
Owner 咏峰(大连)科技有限公司
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