Method for measuring temp. in high-temp. high-pressure closed cavity

A high-temperature, high-pressure, temperature measurement technology, which is applied to thermometers, measuring devices, and heat measurement, can solve the problems of not being able to effectively control the temperature of the airtight cavity and making it difficult to produce high-quality diamond products, and achieve good scalability. performance, eliminate interference, and improve measurement accuracy

Inactive Publication Date: 2005-03-23
桂林电子工业学院
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Problems solved by technology

[0013] That is to say, various parameters in the high-temperature and high-pressure airtight cavity change from time to time during the whole heating process. When the resistivity K of a constant cavity is used to determine the constant current (constant power)

Method used

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  • Method for measuring temp. in high-temp. high-pressure closed cavity
  • Method for measuring temp. in high-temp. high-pressure closed cavity

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Embodiment Construction

[0025] This embodiment is the temperature measurement method applied in the high temperature and high pressure airtight cavity-diamond synthesis cavity of the present invention. Such as figure 1 As shown, the synthesis chamber 6 is a pyrophyllite hexahedron, which is in the center of the six top hammers 2 and six top surfaces 5 of the six-sided top press, and the six top hammers 2 of the six top hammers 2 are closed so that the synthesis chamber 6 is airtight and its Pressurize. Due to the limitation of the production process and the existence of the pressure of the press, the outer surface of the pyrophyllite synthesis chamber 6 cannot be directly installed with a temperature measuring element. However, the top surface 5 of the top hammer 2 of the press is in direct contact with the outer surface of the pyrophyllite cavity, and there is heat transfer between the two, that is, the temperature T at a certain point of the top hammer 2 d There is a functional relationship betwe...

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Abstract

The invention is temperature measuring method in high pressure and high temperature sealed cavity, it assembles a temperature T1-Tn, pressure sensor on the external surface of the cavity and acquires the P, the near place is assembled with environmental temperature sensor and acquires the Th1-Thn and a cavity heating current sensor and acquires I. the computer carries on preprocess to the measured values, and eliminates the deformed signal. The processed signal value is carried on with wavelet transition, and sends then into primary element to be analyzed. The acquired data is transmitted to the dynamic nerve network to carry on self adaptable intelligent calculation, the temperature in the cavity is T=F (T1... Tn, Th1..., Thn, I, P). The invention uses multi-point measurement to measure multi variables, uses primary element analysis, nerve network and other technologies to realizes the dynamic measurement in the high temperature and high pressure cavity; the result will not be affected by the resistance in the cavity; then carries on wavelet transition filter, and online self adaptable correcting function, it guarantees the accuracy of the measurement; the result can be displayed or outputted. It can be applied to the temperature measurement and real-time control in the diamond synthesis cavity.

Description

(1) Technical field [0001] The invention relates to a temperature measurement method, in particular to a temperature measurement method in a high-temperature, high-pressure closed cavity. (2) Technical background [0002] In the measurement of high temperature and high pressure, the measurement of pressure has been mature, but the measurement of high temperature in a closed cavity has always been a difficult problem. The reason is that the high temperature in a closed cavity cannot be directly measured, and the existing methods are only estimated based on experience. [0003] For example, in the process of using a six-sided top press to produce diamonds, since the synthesis chamber is made of pyrophyllite, high pressure is applied outside the closed chamber, and the graphite-diamond phase transition is achieved under the conditions of a pressure of 5.0Gpa and a temperature of 1600K to obtain diamond crystals. [0004] Because of the high temperature and high pressure in the ...

Claims

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Application Information

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IPC IPC(8): G01K7/00G01K13/00
Inventor 谭永红陈辉党选举
Owner 桂林电子工业学院
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