Unlock instant, AI-driven research and patent intelligence for your innovation.

A VOCS gas leak detection method and system based on optical gas imaging

A technology of gas leak detection and gas imaging, which is applied in the testing of fluid tightness, the detection of fluid at the leak point, the testing of machine/structural components, etc., can solve the problems of high false alarm rate, immaturity and impracticality Strong and other problems, to achieve high accuracy, high false alarm rate, high real-time data processing effect

Active Publication Date: 2022-03-01
咏峰(大连)科技有限公司
View PDF0 Cites 1 Cited by
  • 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A VOCS gas leak detection method and system based on optical gas imaging
  • A VOCS gas leak detection method and system based on optical gas imaging
  • A VOCS gas leak detection method and system based on optical gas imaging

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Such as figure 1 As shown, the present embodiment provides a VOCs gas leakage detection method based on optical gas imaging, comprising the following steps:

[0058] 1) Obtain a frame of thermal image of the area to be detected, that is, an infrared image.

[0059] 2) If the frame of infrared image is the first frame of infrared image, then use the frame of infrared image as the background image, and proceed to step 1); otherwise, proceed to step 3).

[0060] 3) if figure 2 As shown, the background subtraction method is used to extract the dynamic change area of ​​the current frame infrared image according to the background image. If the area of ​​the dynamic change area (dynamic change area f n The number of connected points whose median value is not 255) satisfies the dynamic area detection condition, that is, the area of ​​the dynamic change area is greater than the area threshold T1, then enter step 4); otherwise, enter step 8), wherein, the formula of the backgr...

Embodiment 2

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

[0090] The image acquisition module is used to acquire a frame of infrared image of the area to be detected, and if the frame of infrared image is the first frame of infrared image, the frame of infrared image is used as the background image.

[0091] The background subtraction module is used for extracting the dynamic change area of ​​the infrared image of the current frame according to the background image by adopting the background subtraction method.

[0092] The parameter calculation module is used to calculate the gray average value, gray variance, shape irregularity and area change rate of the dynamically changing area satisfying the dynamic area detection condition.

[0093] The gas leakage determination module is used to determine whether gas leakage occurs in the area to be detected according to the count value of the infrared image satisfying the detection co...

Embodiment 3

[0097] This embodiment provides a processing device corresponding to the VOCs gas leakage detection method based on optical gas imaging provided in Embodiment 1. The processing device can be a processing device for a client, such as a mobile phone, a notebook computer, a tablet computer, a desktop Machine computer etc., to carry out the method of embodiment 1.

[0098] The processing device includes a processor, a memory, a communication interface and a bus, and the processor, the memory and the communication interface are connected through the bus to complete mutual communication. A computer program that can run on the processor is stored in the memory, and the processor executes the optical gas imaging-based VOCs gas leakage detection method provided in Embodiment 1 when running the computer program.

[0099] In some implementations, the memory may be a high-speed random access memory (RAM: Random Access Memory), and may also include a non-volatile memory, such as at least o...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a VOCs gas leakage detection method and system based on optical gas imaging, which is characterized in that it includes: an image acquisition module, used to acquire a frame of infrared images of the area to be detected, if the frame of infrared images is the first frame of infrared The image is used as a background image; the background subtraction module is used to extract the dynamic change area of ​​the current frame infrared image; the parameter calculation module is used to calculate the parameters of the dynamic change area that meet the dynamic area detection conditions; the gas leakage judgment module is used for current When the parameters of the calculated infrared image meet the detection conditions, it is determined whether a gas leak occurs; the alarm module is used to output an alarm signal when a gas leak occurs, and to mark the extracted dynamic change area; the image fusion module is used for when the calculated infrared image When the parameters do not meet the detection conditions, the current frame infrared image is fused with the original background image to generate a new background image, and the invention can be widely used in the field of volatile organic compound leakage detection.

Description

technical field [0001] The invention relates to a VOCs (volatile organic compound) gas leakage detection method and system based on optical gas imaging, and belongs to the field of volatile organic compound leakage detection. Background technique [0002] Petroleum refining is a high-risk industry. Most of the raw materials or products of petrochemical enterprises are volatile, flammable and explosive substances. In addition, the production process is relatively complicated and there are many production equipment. It is easy to leak flammable and explosive gases and cause fires. Accidents, and fire accidents in petrochemical enterprises are often accompanied by explosions, which have the characteristics of strong three-dimensionality, easy recombustion and reexplosion, and the consequences are relatively serious. Therefore, petrochemical enterprises have always been the key objects of safety production prevention in various countries. They have very high requirements for saf...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G01M3/04G06T7/00G06T7/11G06T7/136G06T7/194G06T7/62
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