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Liquid temperature measuring method

A temperature measurement and liquid technology, which is applied in the field of liquid rapid temperature measurement, can solve the problems of poor corrosion resistance of protective tubes, poor measurement accuracy of thermocouples, slow response, etc., to achieve accurate measurement, fast and accurate measurement, and overcome the effects of slow response

Inactive Publication Date: 2015-08-26
CHINA ACAD OF AEROSPACE AERODYNAMICS
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Problems solved by technology

[0004] The purpose of the present invention is to provide an online liquid temperature measurement method, which can effectively solve the disadvantages of poor corrosion resistance of the protection tube, poor thermocouple measurement accuracy, slow response, etc., and has a fast response of 1 second temperature measurement, accurate measurement, and long service life. Long and other advantages

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Embodiment Construction

[0017] For the design of this project, see figure 1 It is planned to adopt the fusion of contact temperature measurement and non-contact temperature measurement, and the optical channel protected by air film, to collect the spectral signal of the measured object to know the temperature.

[0018] The system includes a composite ceramic protection tube 4, a one-way stop valve 7, a gas source controller 9, an optical measurement system (6, 10, 11), a spectral thermometer 12, a data recorder 13, and a large-screen display 14. Functions of main components: Composite ceramic protective tube 4 has properties such as corrosion resistance and wall thickness, and is used to protect metal optical blackbody cylinder 6 and prolong service life; metal optical blackbody cylinder 4 is used for the spectrum channel and gas film purge channel of the measured object; The gas film controller 7 is used for gas film generation and control; the one-way stop valve 7 is used for the one-way control of...

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Abstract

The invention provides a liquid temperature measuring method which is applied to a liquid temperature measuring system. The liquid temperature measuring system comprises an optical measuring system, a gas source controller, a spectrum temperature measuring instrument, a data recorder and a large-screen display, wherein the optical measuring system comprises a metal optical tube, a measuring window and an optical lens. The liquid temperature measuring method comprises the following steps: the optical measuring system collects spectrum signals of a liquid target surface in the metal optical tube, and transferring the collected spectrum signals to the spectrum temperature measuring instrument; the spectrum temperature measuring instrument converts the received spectrum signals into electric signals, converts the electric signals into temperature data, and then outputs the temperature data to the data recorder; the temperature data is displayed on the large-screen display. The liquid temperature measuring method integrates the advantages of high precision of contact-type temperature measuring and high response of non-contact temperature measuring, so that not only can the defect of low response speed caused by the thick protection pipe wall of the conventional online temperature measuring system be overcome, but also the characteristics of both high precision and high response can be achieved.

Description

technical field [0001] The invention relates to a liquid temperature measurement method, in particular to a liquid rapid temperature measurement method capable of on-line temperature measurement of high temperature or corrosive liquids. Background technique [0002] The spectral thermometer is based on the theory of black body radiation (Planck's law: the radiation flux E emitted by a black body per unit area in the direction of the hemisphere is a function of wavelength and black body temperature), and adopts a comprehensive temperature measurement method. It is composed of two parts: a detection tube and a spectral pyrometer, which can be used to measure the actual temperature inside various high-temperature furnaces and melts, and is not affected by environmental pollution and target blackness coefficient. [0003] Due to the high corrosiveness of some metal liquids to be tested, temperature measurement is basically carried out with 1, using K-type armored thermocouples f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J5/00
Inventor 蔡捷伟
Owner CHINA ACAD OF AEROSPACE AERODYNAMICS
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