Method for detecting floating frequency of pointer of liquid level meter based on image processing
An image processing and liquid level technology, applied in image data processing, image enhancement, image analysis, etc., can solve the problems of unrecognizable, disturbing noise, manual monitoring and labor-intensive, etc., and achieve the effect of fast and accurate prediction and early warning
Active Publication Date: 2021-08-17
四川泓宝润业工程技术有限公司 +2
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[0002] In the process of oil and gas exploration, sitting on guard to observe overflow is the focus of well control work in oil and gas exploration sites. The monitoring of liquid level gauges is an important work content. Manual monitoring consumes manpower, and the use of robot identification makes the collected data prone to various disturbances. Noise, resulting in poor recognition effect, or even unrecognizable situations, which seriously affects the liquid level monitoring
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[0079] Hereinafter, refer to Fig. 1 (a) to image 3 Specific embodiments of the present disclosure will be described in more detail. Although the specific embodiments of the present disclosure are shown in the drawings, it is understood that the present disclosure can be implemented in various forms and not to be set forth herein. Instead, it is provided to provide more thoroughly understood the present disclosure, and can communicate the scope of the disclosure to those skilled in the art.
[0080] It should be noted that some vocabulary is used in the specification and claims to refer to a particular component. Those skilled in the art will be appreciated that the technicians may be called with different nouns. This specification and the claims do not use the difference in noun as a differential component, but as a differential difference between the components in functionality. As mentioned in the "included" or "including" as an open term, it is interpreted as "including but not...
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The invention aims at the field of image processing and wavelet transformation, and discloses a method for detecting floating frequency of a pointer of a liquid level meter based on image processing. The method comprises the following steps: shooting a pointer of a liquid level meter and identifying readings to form a liquid level time-domain graph of the liquid level changing along with time; carrying out discrete wavelet transform on the time-domain graph of the liquid level to obtain a time-frequency graph of the liquid level; obtaining frequency signals based on the time-frequency graph, and quantizing the amplitudes of some frequency signals to be zero, wherein the remaining frequency signals serve as denoised frequency signals; and updating the time-frequency graph according to the denoised frequency signal, performing wavelet inverse transformation on the new time-frequency graph to obtain a new time-domain graph, obtaining the denoised liquid level data, and further detecting the floating frequency of the pointer of the liquid level meter. Therefore, through pure image processing instead of manual monitoring, pointer floating can be rapidly and accurately detected and early warned.
Description
Technical field [0001] The present disclosure belongs to the field of image processing and wavelet transform, in particular a method of detecting the level of the liquid level table based on image processing. Background technique [0002] During the oil and gas exploration process, the observation of the overflow is the focus of well-controlling work in the field of oil and gas exploration. The monitoring of liquid level is an important work content, and the manual monitoring is laborious, and the robot is identified, let the data acquisition data is easy to generate various interference Noise, resulting in the difference between the recognition effect, and even unrecognizable, and severely affects the level monitoring. How to use image processing technology, in the case of overcoming the associated interference noise, the liquid level detection directly according to the liquid level image, it is an urgent problem to be solved. [0003] The above information disclosed in the back...
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IPC IPC(8): G06K9/48G06K9/62G06N3/04G06N3/08G06T7/80
CPCG06T7/80G06N3/08G06T2207/30208G06V10/478G06V10/46G06N3/045G06F18/241
Inventor 刘云川殷姣郑光胜郑侃杨正川叶明
Owner 四川泓宝润业工程技术有限公司