Suspension gap visual detection method based on image processing

Abstract

The invention discloses a suspension gap visual detection method based on image processing. The suspension gap visual detection method comprises the steps: firstly obtaining an original high-definition image of a suspension gap region, and processing the original high-definition image to obtain a binary image of a suspension gap region of interest; calculating the number of pixel points with a binarization result of 1 in the binarized image of the suspension gap region of interest to obtain the pixel area s of the suspension gap region of interest; and finally, calibrating the pixel area s andthe actual gap distance, and calculating the actual gap distance d. According to the suspension gap visual detection method, the actual gap distance is calculated according to the image pixel area ofthe region of interest of the suspension gap, and the measurement precision is high, and the anti-interference capability is high, and asymmetric interference existing in the region of interest of the suspension gap can be effectively removed, and meanwhile an interference fault position is alarmed and positioned; and the actual suspension gap distance change is calculated through the image pixelarea change of the region of interest of the suspension gap, and the tracking is sensitive, and the linearity is high, and both the real-time performance and the accuracy can meet the requirements ofa suspension ball control system.

Description

technical field [0001] The invention relates to the fields of magnetic levitation technology and image processing technology, in particular to a high-precision visual detection method for a levitation gap based on image processing. Background technique [0002] The suspension gap signal detection is an important part of the closed-loop control of the magnetic suspension system. The magnetic suspension system adjusts the electromagnetic force through the real-time feedback of the gap signal so that the controlled object can overcome the gravity and stabilize at the equilibrium position. The accuracy and real-time performance of levitation gap signal detection directly affect the control performance of the maglev system. In the magnetic levitation ball system, the levitation gap actually refers to the distance from the upper apex of the levitated steel ball to the lower surface of the electromagnet, so the gap sensor is essentially a displacement sensor. [0003] Common displ...

AI Technical Summary

Problems solved by technology

Eddy current sensors are widely used in suspension measurement systems, but there are still many shortcomings and deficiencies. For example, the measurement accuracy is greatly affected by temperature and the surface roughness of the measured object, and temperature compensation and nonlinear correction are required, and the cost is high. The output value of the sensor needs to undergo A / D conversion before it can be connected to the control system

The photoelectric sensor measures the displacement of the object according to how much the measured object blocks the luminous flux. The biggest disadvantage is that it is susceptible to interference and has poor environmental adaptability.

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