System and method for detecting hydrophilic angle on surface of composite insulator
A technology for synthesizing insulators and hydrophilic corners, which can be used in surface/boundary effects, instruments, measuring devices, etc., to solve problems such as unfavorable working efficiency of power systems, and achieve low manufacturing costs, simple device design, and reduced principle errors. Effect
Inactive Publication Date: 2012-08-08
WUHAN UNIV
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This method has high accuracy and is an ideal verification method, but it needs to be realized in the laboratory by means of static contact angle measuring instruments and measuring microscopes. At present, it is difficult to make small instruments for on-site testing, which is not conducive to Improve the working efficiency of the power system (see literature 2, 3)
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[0052] The technical scheme proposed by the present invention is based on a new type of hydrophilic angle testing system and method on the insulator surface of CCD (Charge-coupled Device, charge-coupled device). On the basis of the contact angle method, CCD technology and digital image processing technology are introduced to realize the synthesis The on-site automatic detection of the hydrophilic angle of the insulator can make the verification work convenient.
[0053] The system provided by the invention takes CCD as the core to complete the quantitative dripping and horizontal tangential shooting in the insulator detection, reducing the principle error caused by the difference in dripping water or shooting angle; Carry out image processing to calculate the hydrophilic angle data of the insulator surface. The design of the system is composed of electromechanical hardware body and verification software program. The electromechanical hardware body includes: the mechanical tran...
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The invention relates to the technical field of performance detection of insulators, in particular to system and method for detecting a hydrophilic angle on the surface of a composite insulator. The system comprises a mechanical transmission mechanism, a quantified dropping mechanism, a CCD (Charged Coupled Device) horizontal shooting mechanism and a detection module, wherein the mechanical transmission mechanism is used for controlling the transmission of a screw rod of a main worktable and the lifting of a water outlet dropper and a CCD rack; the quantified dropping mechanism is used for accurately controlling the water injection rate on the surface of the insulator in each detection; the CCD horizontal shooting mechanism is used for obtaining the image of water drops on the surface of the insulator; and the detection module is used for carrying out assistant processing on the image of water drops and finally obtaining the hydrophilic angle. In the method of the invention, the imageis preprocessed by using gray stretching, filtration and other algorithms; the division of the image is realized by using the algorithms such as edge detection and the like; outline discrete points are fitted by using polynomial fitting; and a contact angle is obtained by carrying out derivation on the fitted polynomial. By means of the invention, the principle error of the device is reduced to agreat extent; the detection accuracy is higher; the result is objective; and the whole device has simple design and low manufacturing cost and can be applied to the detection operation in site environment.
Description
technical field [0001] The invention relates to the technical field of insulator performance verification, in particular to a verification system and method for the surface hydrophilic angle of a composite insulator. Background technique [0002] Insulator performance verification plays an important role in transmission line maintenance. At present, silicone rubber composite insulators have been more and more widely used in power systems due to their excellent pollution flashover resistance. However, due to material aging, sunshine and rain, acid rain erosion and other industrial pollution factors, the surface of the insulator and the internal structure of the material will change. Therefore, it is necessary to find an effective method that can quickly identify the insulation performance of composite insulators. The study found that the excellent wet-fouling resistance of silicone rubber composite insulators stems from the hydrophobicity of the low-energy surface of silico...
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IPC IPC(8): G01N13/00G01B11/26
Inventor 赵宇王先培乐意秦杨吕郁文
Owner WUHAN UNIV