Illumination intensity self-adaptive image frost detection sensor and identification method

Abstract

The invention discloses an illumination intensity self-adaptive image frost detection sensor and an identification method, and belongs to the technical field of sensors. The influence of different illumination environments is overcome through gray processing of frost layer images based on the image recognition principle, sensors used for monitoring the frosting degree of the surfaces of heat exchangers of refrigeration devices such as an air source heat pump unit and a heat pump type room air conditioner and adopting a reference illumination surface source to carry out self-correction on grayvalues, and thus the working stability and the reliability of the sensors are guaranteed.

Description

technical field [0001] The invention relates to an image frost measuring sensor and a recognition method with self-adaptive light intensity. Specifically, it is aimed at refrigeration devices such as air source heat pump units and heat pump room air conditioners, and uses image recognition grayscale detection technology to realize heat exchanger A sensor for monitoring the amount of frost on a surface belongs to the technical field of sensors. Background technique [0002] Frosting is a key issue that affects the operating efficiency of refrigeration devices such as air source heat pump units and heat pump room air conditioners. The existence and growth of the frost layer increases the heat transfer resistance of the heat exchangers of refrigeration devices such as air source heat pumps and heat pump room air conditioners, reduces the heat transfer efficiency, and causes the heating performance of the unit to decline. Therefore, defrosting operation must be performed. The e...

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Problems solved by technology

[0006] Among the above defrosting control methods, the "soft measurement" frost control method, which measures one or more variables in frosting conditions or by-products as the basis for defrosting judgment, cannot fully recognize and monitor the frosting process; The "artificial intelligence" frost control method that considers multiple factors has low control accuracy due to insufficient theoretical research on the frosting process, heavy workload and difficult to obtain accurate samples; while the control method based on the idea of ​​"direct measurement" The frost method is currently restricted by factors such as operating space, environmental conditions, and intelligent control, and has not yet been widely used.

Therefore, in the actual operation of refrigeration devices such as air source heat pump units and heat pump room air conditioners, accidents of "wrong defrosting" and "defrosting without frost" often occur, which not only lead to waste of energy, but also in severe cases It will also cause a vicious accident of compressor burnout

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