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Coating thickness measuring method and measuring system

A technology of coating thickness and measurement method, applied in the field of coating thickness measurement method and measurement system, can solve problems such as narrow application range, and achieve the effects of convenient operation, fast analysis speed and high precision

Active Publication Date: 2018-03-23
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Embodiments of the present invention provide a coating thickness measurement method and a measurement system, which can solve the problem that the existing coating thickness measurement method has a relatively narrow application range

Method used

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  • Coating thickness measuring method and measuring system
  • Coating thickness measuring method and measuring system

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Embodiment 1

[0026] see figure 1 , the embodiment of the present invention provides a method for measuring coating thickness, comprising the following steps:

[0027] S1. Bombard the first coating with the first pulse laser, and acquire the spectrum information of the photoacoustic signal emitted when the first pulse laser bombards the first coating;

[0028] Among them, the first pulse laser can be a pulse laser with the following parameters set: the wavelength is 1064nm, the single pulse energy is 100mJ, the frequency is 2Hz, and the pulse width is 7ns; the first coating is the coating with the thickness to be measured, for example, it can be coated For RTV coatings on composite insulators, the substrate on which the first coating is applied is of a different material than the first coating.

[0029] S2. Determine the bombardment times of the first pulse laser from the beginning of being bombarded to the breakdown of the first coating according to the spectrum information;

[0030] S3. D...

Embodiment 2

[0048] see Figure 6 , the embodiment of the present invention provides a coating thickness measurement device, including: a detection module 1, the detection module 1 is used to detect the photoacoustic signal emitted when the pulsed laser bombards the first coating, and convert the photoacoustic signal into Electric signal; processing module 2, processing module 2 is connected with detection module 1, and processing module 2 is used for receiving electric signal, obtains the spectrum information of photoacoustic signal according to electric signal, determines coating from being bombarded to being hit according to spectrum information The number of bombardments of the pulsed laser is timed, and the thickness of the first coating is determined according to the functional relationship between the thickness of the coating of the same material as the first coating and the number of bombardments of the pulsed laser. Wherein, the detection module 1 may be an ultrasonic sensor; the ...

Embodiment 3

[0053] see Figure 6 , the embodiment of the present invention provides a measurement system for coating thickness, including a laser 200 (for example, a Q-tunable nanosecond pulsed laser), a focusing lens 300 and the coating thickness measurement device 100 described in Embodiment 2, focusing The lens 300 is located on the path of the laser light emitted by the laser 200 .

[0054] In the coating thickness measuring system provided by the embodiment of the present invention, when measuring the thickness of the first coating 600, the laser 200 emits pulsed laser light, and the pulsed laser beam reaches a sufficient energy density to bombard the surface of the first coating 600 after being focused by the focusing lens 300 , so that the first coating 600 is excited to generate plasma, thereby generating the required photoacoustic signal, the coating thickness measuring device 100 can determine according to the spectral information of the photoacoustic signal that the first coati...

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Abstract

The invention discloses a coating thickness measuring method and a measuring system, relates to the coating thickness measuring technical field, and aims to solve the problems that an existing coatingthickness measuring method is narrow in application scopes; the method comprises the following steps: S1, using the first pulse laser to bombard the first coating, thus obtaining the frequency spectrum information of optical-acoustic signals emitted by the first coating bombarded by the first pulse laser; S2, determining the bombarding frequency of the first pulse laser from the first time the first coating is being bombarded until the first coating is punctured according to the frequency spectrum information; S3, determining the thickness of the first coating according to a function relationbetween the thickness of the coating (with the same material of the first coating) and the bombarding frequency of the first pulse laser. The measuring method and system can be applied to coating measurement.

Description

technical field [0001] The invention relates to the technical field of coating thickness measurement, in particular to a coating thickness measurement method and a measurement system. Background technique [0002] A good external insulation state of high-voltage transmission lines is an important guarantee for the safe operation of power systems. Since the 1990s, composite insulation materials have been widely used in power systems, so that the pollution flashover resistance of external insulation equipment has been significantly improved. Composite insulating materials are mainly used to make composite insulators, make various composite insulating coatings (such as RTV, the English full name is Room Temperature Vulcanizing silicone rubber coating), and make various bushings. [0003] Among them, the composite insulating coating is applied on the surface of the insulator by brushing, spraying, etc., so as to achieve the purpose of isolating the insulator from the external e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/06G01B17/02
CPCG01B11/0616G01B17/025
Inventor 邹林王颂李锐海王希林
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD
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