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Tokamak device divertor target plate temperature measurement method based on single-wave filtering

A tokamak, temperature measurement technology, applied in optical radiation measurement, radiation pyrometry, measurement devices and other directions, can solve the problem of no tokamak device, unable to quickly respond to target temperature changes, etc., to achieve accurate fitting results , Improve the effect of temperature measurement accuracy

Active Publication Date: 2021-06-22
HEFEI UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The existing thermocouple contact temperature measurement cannot quickly respond to the temperature change of the target. The emissivity of the target used in the non-contact infrared temperature measurement will be affected by many aspects. Taking tungsten as the main material of the divertor target plate as an example, there is currently no There is no emissivity value fully applicable to the temperature measurement of the tokamak device

Method used

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  • Tokamak device divertor target plate temperature measurement method based on single-wave filtering
  • Tokamak device divertor target plate temperature measurement method based on single-wave filtering
  • Tokamak device divertor target plate temperature measurement method based on single-wave filtering

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Embodiment 1

[0107] (1) First follow figure 1 As shown, an infrared narrow-band filter with a center wavelength of 10200nm and a bandwidth of 100nm is installed in front of the lens of the infrared thermal imager. One end of the special optical path is connected to the window of the tokamak device, and the other end is connected to the infrared filter, so that the radiation inside the tokamak device can enter the special optical path from the window, and the radiation that can pass through the filter will be measured by the thermal imager to and displayed on the control software interface in the form of a grayscale image.

[0108] (2) The infrared thermal imager is connected to the industrial computer through a Gigabit network cable. The industrial computer controls all operations of the infrared thermal imager. Set the emissivity to 1 in the thermal imager control software on the industrial computer. By reading the collected The gray value of a certain point in the image can be used to c...

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Abstract

The invention discloses a tokamak device divertor target plate temperature measurement method based on single-wave filtering and belongs to the technical field of infrared temperature measurement and magnetic confinement nuclear fusion. The method comprises the following steps of: firstly, fitting a relational expression between radiation energy emitted by a measured object and radiation energy measured by a thermal imager under a wavelength lambda0; fitting a relational expression between the temperature and the emissivity of a divertor target plate under the wavelength lambda0; and finally, measuring the gray value of an image by using a thermal imager in the discharge process of a Tokamak device, and calculating the real temperature of the divertor target plate at the moment. According to the Tokamak device divertor target plate temperature measurement method based on single-wave filtering of the invention, a single-wave optical filter is used, the influence of a wavelength range on the temperature measurement precision is reduced, meanwhile, the light transmittance coefficient of the optical filter, attenuation of radiation in a special optical path and different temperature conditions of the Tokamak device are also considered; and a nonlinear model is used for fitting the relation between the temperature and the emissivity, a fitting result is more accurate than a linear model and a constant model.

Description

Technical field: [0001] The invention relates to the technical fields of infrared temperature measurement and magnetic confinement nuclear fusion, in particular to a method for measuring the temperature of a divertor target plate of a tokamak device based on single-wave filtering. Background technique: [0002] The energy issue is a challenge to the economic and social development of all countries. The development of clean energy and the use of nuclear fusion technology to improve energy efficiency are urgent demands of today's society. The tokamak device includes an annular container that uses magnetic confinement to achieve controllable nuclear fusion, and subsystems such as low temperature, vacuum, water cooling, power supply and control, data acquisition and processing, wave heating, wave-driven current, and diagnosis. [0003] The use of non-contact thermometry to measure and diagnose the temperature of the first wall of a tokamak has been an active area of ​​research i...

Claims

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Application Information

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IPC IPC(8): G01J5/52
CPCG01J5/53
Inventor 舒双宝王子艺赖金张育中郎贤礼陈晶晶
Owner HEFEI UNIV OF TECH
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