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Visual inspection and transient measurement system for micro-scale explosive boiling process

A measurement system, micro-scale technology, applied in the direction of measurement device, investigation stage/state change, material analysis through optical means, etc., can solve problems such as inability to give reasonable explanations and appropriate descriptions, limited understanding of microscopic mechanisms, etc. To achieve the effect of ensuring instantaneity and accuracy

Inactive Publication Date: 2007-07-11
INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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Problems solved by technology

However, due to the emergence of supernormal phenomena in the transmission process, conventional measurement techniques and classical theories are faced with huge challenges, so that people's understanding of its microscopic mechani

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  • Visual inspection and transient measurement system for micro-scale explosive boiling process
  • Visual inspection and transient measurement system for micro-scale explosive boiling process

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Embodiment Construction

[0022] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0023] Please combine Figure 1 and Figure 2, the present invention is mainly composed of a pulsed laser heating system, a transient temperature measurement system, a transient pressure measurement system and a high-speed microscopic magnification photographic observation and analysis system.

[0024] In the pulse laser heating system, the laser controller 1 controls the output power of the pulse laser 2 to irradiate the laser beam 2A onto the surface of the platinum thin film test piece 3 .

[0025] The pulse laser 2 used in the present invention has a wavelength of 1.06 μm, an adjustable pulse width of 800 ns to 5 μs, an adjustable spot diameter of 0.2 to 10 mm, and a power density of 10-10000 MW / m 2 Adjustable, through the controller to control the switching power supply to adjust its output parameters.

[0026] Platinum thin film test piece 3 is formed by...

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Abstract

The visual measurement and instant measuring system of the micro scale explosive boiling process comprises pulse laser with laser beam and trigger signal, platinum film trying part in the solution pool on the same axis with the laser beam, leads from both sides of the quartz glass post connected with the data sampling recorder, a high speed camera with the lens facing the surface of the platinum film trying part and the above area, a high frequency pressure sensor connected with data sampling recorder with the sensing head of the sensor inside the working media of the liquid. The pulse laser send trigger signals to data collecting recorder and high speed camera while sending out laser, with the laser beam lighting the surface of the film, which is heated to make the working media inside the liquid explode and boil with the high speed cambera taking picture of the whole process.

Description

technical field [0001] The invention relates to a system for observing and measuring rapid explosive boiling of a liquid working substance, in particular to a visual observation and transient measurement system for a microscale explosive boiling process. Background technique [0002] Micro-scale hyperrapid explosive boiling is a supernormal boiling phenomenon caused by transient high heat flow. In metallurgy, chemical industry, nuclear reactor and other processes. The first research on ultra-rapid explosive boiling heat transfer is to solve the accidents that often occur in nuclear reactors, metallurgy, liquefied natural gas and other industries that are closely related to them. The steam exploded, resulting in a serious nuclear safety accident. In recent years, with the rapid development of modern high-tech, the hyperrapid explosive boiling process has been further widely used: laser melting of metal materials, laser cleaning of the surface of valuables and microelectroni...

Claims

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Application Information

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IPC IPC(8): G01N21/84G01N25/12
Inventor 淮秀兰陶毓伽李志刚尹铁男
Owner INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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