Traveling-wave tube internal temperature soft-measurement method based on finite element model

A technology of internal temperature and traveling wave tube, which is applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problems of interfering with the distribution of traveling wave tubes, high implementation cost, and difficult implementation, so as to avoid complex problems, Effects that are costly to implement and difficult to measure

Active Publication Date: 2015-09-16
SOUTHEAST UNIV
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Problems solved by technology

However, serious difficulties were encountered in the real-time measurement of the temperature inside the TWT
Because the traveling wave tube is a high-end precision device, its internal electromagnetic field environment is extremely complex. If you place a temperature sensor in it, you will encounter the following difficulties: on the one hand, the sensor is likely to be affected by the high-speed electron beam and cannot be measured; On the one hand, the sensor may also interfere with the distribution of the electron beam and electromagnetic field inside the traveling wave tube, which directly causes the traveling wave tube to fail to work normally.
Even if the traveling wave tube can still be used normally after the temperature sensor is installed, the traveling wave tube is a precision device designed according to strict requirements. To place the temperature sensor inside the traveling wave tube, it needs to be opened and reassembled after installation, or It needs a specially customized traveling wave tube to realize it, which has high process requirements, is difficult to implement, and the implementation cost is high, and these methods are also difficult to be extended to the detection of large quantities of traveling wave tubes
TWT designers suffer from the lack of convenient and effective measurement methods for the internal temperature field of TWT, and cannot intuitively understand the actual thermal state of TWT during operation, which seriously restricts the research progress of TWT thermal performance analysis. The optimized design brings great inconvenience

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  • Traveling-wave tube internal temperature soft-measurement method based on finite element model
  • Traveling-wave tube internal temperature soft-measurement method based on finite element model
  • Traveling-wave tube internal temperature soft-measurement method based on finite element model

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Embodiment Construction

[0037] The specific embodiment of the present invention will be described in detail below in conjunction with an experimental prototype designed by the present invention.

[0038] The block diagram of the overall structure of the prototype is shown in figure 2 As shown, it is mainly composed of the front-end shell multi-point temperature measurement module and the background soft-measurement software for the internal temperature of the traveling wave tube.

[0039] The temperature value on the surface of the traveling wave tube shell is usually within 200°C, so the front-end temperature acquisition module in this experimental prototype uses 16 K-type thermocouples as temperature sensors to achieve a temperature measurement accuracy of ±2°C and a range of 0-400°C The temperature measurement of the traveling wave tube shell meets the requirements of multi-point temperature measurement of the traveling wave tube shell. After installing multiple thermocouple sensors on the corresp...

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Abstract

The invention discloses a traveling-wave tube internal temperature soft-measurement method based on a finite element model. With multi-point temperature values of the shell of a traveling-wave tube as auxiliary variables, the finite element soft-measurement thermal model of the traveling-wave tube is created; with heat source distribution as independent variables, a target function of an error sum of squares between the multi-point temperature measurement values of the shell and corresponding point temperature simulation values of the finite element thermal model of the traveling-wave tube is derived, and is solved by an iterative algorithm, so that an optimal heat source distribution solution is obtained, finally, the optimal heat source distribution solution is loaded into the finite element thermal model of the traveling-wave tube, and an internal temperature soft-measurement value of the traveling-wave tube is obtained by finite element stimulation calculation. The traveling-wave tube internal temperature soft-measurement method based on the finite element model breaks through the limitation of conventional detection, and prevents a series of complex problems brought about by temperature sensors placed in traveling-wave tubes, measurement is convenient, the implementation cost is low, and the traveling-wave tube internal temperature soft-measurement method based on the finite element model can be applied in the mass testing of traveling-wave tubes.

Description

technical field [0001] The invention relates to a method for soft measurement of the internal temperature of a traveling wave tube, which belongs to the field of thermal state monitoring and analysis of the traveling wave tube. Background technique [0002] As a high-power broadband microwave source and an important microwave signal amplifier, traveling wave tubes are used in many fields, and have become important microwave electronic devices for electronic equipment such as radar, electronic countermeasures, and satellite communications, and have an irreplaceable position. In national defense equipment, traveling wave tubes are known as the "heart" of weapons and equipment, and are very important basic equipment for national defense. The application field and importance of the traveling wave tube determine that it must have very high stability and reliability, which is directly related to the service life of related equipment. [0003] The temperature distribution and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 赵兴群林艺文孙小菡韦朴
Owner SOUTHEAST UNIV
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