JPH03186748A - Image pickup method for object to be measured - Google Patents

Abstract

PURPOSE:To obtain an infrared-ray image under a state that a heat exchange of an object to be measured and the open air is small by installing the object to be measured in a vacuum container having a window for allowing infrared rays to transmit through, and executing an image pickup of the object to be measured by an infrared-ray camera through this window. CONSTITUTION:A heat pipe 1 being an object to be measured is inserted from an inserting port 7 into a vacuum container 5 having a window 6 for allowing infrared rays to transmit through, and the inside of the vacuum container 5 is evacuated to a vacuum by a vacuum pump 8. Thereafter, heating and cooling of the heat pipe 1 are executed, and a temperature measuring surface 1a is brought to image pickup by an infrared-ray camera 10 through the germanium window 6. At the time of image pickup, since the periphery of the heat pipe 1 is a vacuum state, a heat exchange of the heat pipe 1 and the open air is eliminated. Accordingly, the heating quantity by a heating source 2 becomes equal to a transport heating value of the heat pipe 1, and the transport heating value can be measured with high accuracy from the heating quantity.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention makes it possible to check the operating state of the peat pipe using an infrared image, for example, in a performance test of a heat pipe effective for thermal control of an artificial satellite. This invention relates to an improvement in a method of imaging an object to be measured.

[Traditional handling technique]

FIG. 2 is a diagram showing a conventional imaging method for photographing a heat pipe as an object to be measured and obtaining an infrared image.
i), fi+ is the object to be measured, heat nok, (la
) is the temperature measurement surface, (2) is the heating source that adds heat to the heat pipe (1), (3) is the cooling source that takes heat away from the heat pipe (1), (4) is the insulation material, and (9) is the support C1l is an infrared camera, aD is an arrow indicating the flow of heat, and +13 is an arrow indicating the flow of heat leak from the temperature measurement surface (1a) of the heat pipe (1).

A heat pipe is a device that can transport a large amount of heat with a small temperature drop. After manufacturing, both ends of the heat pipe are heated and cooled to a predetermined amount of heat, respectively, as shown in the diagram, and an infrared camera is used to measure whether heat transport is occurring normally at that time to determine whether the product is acceptable or not. At this time, the heat pipe (
1), as well as the temperature distribution from the heating section (2) to the cooling section (3).
) It is important to measure the amount of heat transported to (transported heat amount).

[Problem that the invention attempts to solve]

In the case of the above method, a temperature measurement surface (1a) exposed to the outside air is required at the negative part of the heat pipe (1) for imaging by an infrared camera (5). Therefore, heat exchange occurs between this surface and the outside air, and the amount of heat transported from the heating section (2) to the cooling section (3) cannot be measured with more precision than the amount of heating or cooling.

This invention was made to solve the 1N problem, and aims to obtain an infrared image under a situation where the amount of heat exchange between the object to be measured and the outside air is small.

Means for Solving Problem C8] In the imaging method according to the present invention, an object to be measured is placed in a vacuum container having a window that transmits infrared rays, and an infrared camera images the object through the window.

[Effect]

By installing the object to be measured according to the present invention in a vacuum container, heat exchange with the outside air can be reduced.

〔Example〕

FIG. 1 shows an embodiment of the present invention.9. f
i+ is the heat pipe that is the object to be measured, (Ia)
is a temperature measurement surface, (2: is a heating source that adds heat to the heat pipe (1), and (3) is a cooling source that removes heat from the heat pipe (1).

(51 is the vacuum volume 5. +61 is a germanium window that transmits infrared rays and is attached to the vacuum container (5), +71
is the entrance (8) for taking in and out the heat pipe (1).
C. A vacuum pump for evacuating the inside of the vacuum container (6), (
9) is a support stand, αG is an infrared camera, and 9) is an arrow indicating the flow of heat.

Imaging is performed in the following steps. Insert the heat pipe (1) into the vacuum container (5) through the loading port (8), and remove the heat pipe (1) from the vacuum container (5).
5) Vacuum the inside using the vacuum pump (8). after that.

The heat pipe (1) is heated and cooled to a 9m degree measurement surface (
1a) through the germanium window (6) with an infrared camera O
Image is taken at G.

During imaging, the area surrounding the heat pipe is in a vacuum state, so there is no heat exchange between the heat pipe and the outside air. Therefore, the amount of heat generated by the heat source (2) becomes equal to the amount of heat transported by the heat pipe, and the amount of transported heat can be measured more accurately than the amount of heat.

〔Effect of the invention〕

As explained above, in this invention, since the object to be measured is installed in a vacuum container with a window that transmits infrared rays, the object to be measured can be measured by an infrared camera while minimizing heat exchange between the object and the outside air. Can be imaged.

In the examples, a heat pipe is used as the object to be measured, but it is not limited to this, and the imaging method according to the present invention can be sufficiently effective as long as a temperature distribution is generated on the outer surface by heating and cooling. It will be done.

[Brief explanation of drawings]

FIG. 1 is a diagram showing a method for imaging an object to be measured, showing one embodiment f11 of the present invention, and FIG. 2 is a diagram showing a conventional method. In the figure, (1) is a heat pipe, and (5) is a vacuum container. (6) is a germanium window, (IG is an infrared camera. Identical or equivalent parts in the two figures are indicated with the same reference numerals.

Claims (1)

[Claims] A method of capturing an infrared image of a heated and cooled object using an infrared camera, characterized in that the object is placed in a vacuum container having a window that transmits infrared rays and the image is captured. A method for imaging an object to be measured.