JPH0523080U - Surface temperature distribution measuring device - Google Patents

Abstract

(57) [Summary] [Purpose] To enable two-dimensional grasp of the surface temperature of an object in a short time. [Structure] The temperature-indicating paints 2 having different discoloring temperatures are continuously adhered to the surface of the temperature measurement object 1 in a minute region, and after the test, the color change of the temperature-indicating paint 2 is performed for each block composed of a plurality of minute regions. The state is read by the reading device 7, and the temperature distribution on the object surface is calculated by the calculation device 9 based on this data,
A device that outputs the result to a display device 10 such as a printer.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 INDUSTRIAL APPLICABILITY The present invention relates to a surface temperature distribution measuring device, and can be applied to measuring the surface temperature of steam turbines, gas turbines, superchargers, other general rotary machines and stationary parts.

[0002]

[Prior Art]

 As a method of measuring the surface temperature of an object, there are a method of installing a thermocouple in the temperature measurement part and a method of remotely detecting the heat ray radiated from the object surface. The method of using a thermocouple is to measure points on the surface of an object, and the method of detecting heat rays is to measure areas. Such a measuring method is not necessarily in an environment in which the whole can be measured, that is, a two-dimensional temperature change can be measured, especially in rotating parts.

Therefore, conventionally, as shown in FIGS. 6 and 7, for example, there is a method in which the temperature-indicating paint 2 is linearly applied on the surface of an object 1 to be measured, which is an impeller of a radial type supercharger, and measurement is performed. is there. According to this method, it can be seen that when the linear thermochromic paint 2 discolors, the object surface temperature rises to at least the discoloration temperature of the thermochromic paint 2. However, since each thermochromic paint 2 is compatible with only one temperature, several kinds of thermochromic paints 2 having different discoloring temperatures are linearly formed (in the example of FIG. It is often applied concentrically or radially in the example of FIG. 7, and in this case, line measurement is performed.

[0004]

[Problems to be solved by the device]

 The line measurement as described above can be applied when the degree of change in the surface temperature of the temperature-measured object 1 is small, but cannot be applied when the temperature change is two-dimensionally significant.

An object of the present invention is to provide an apparatus capable of accurately measuring the surface temperature of an object to be measured even when the surface of the object to be measured has a two-dimensionally significant temperature change.

[0006]

[Means for Solving the Problems]

 For the above purpose, according to the present invention, a plurality of temperature-indicating paints are divided into minute regions and the surface of the temperature measuring unit is applied, or a paper coated with a plurality of temperature-indicating paints is divided into minute regions. A device for adhering to the surface of the temperature indicator, a device that reads the color of the temperature-sensitive paint by dividing it into minute areas, and a device that converts the read color to temperature and obtains the average temperature for each block to obtain the surface temperature distribution of the temperature measurement target area. There is provided a surface temperature distribution measuring device comprising a calculation device for obtaining the surface temperature distribution and a device for displaying the obtained surface temperature distribution.

[0007]

[Action]

 According to the above means, it is possible to estimate the temperature of each minute area on the surface of the object by partitioning a plurality of temperature indicating paints into each minute area and applying or sticking the temperature indicating paint to the temperature measurement target portion. The temperature measurement is a surface measurement in which the color is read by dividing each block in a micro area, and the arithmetic unit calculates the average temperature of each block and the surface temperature distribution of the temperature measurement target from the color and displays it on the display device. .

[0008]

【Example】

 FIG. 1 shows an impeller of a radial type supercharger as an object 1 to be measured whose surface temperature distribution is to be measured, and an enlarged detail of the temperature-indicating paint 2 applied to the surface of the impeller. . As shown in the drawing, the temperature-indicating paint 2 applied to the surface of the temperature-measured object 1 is divided into several types (A to H in the illustrated example) having different discoloring temperatures and divided into minute regions. The minute areas are, for example, quadrangles each having a side of about 2.5 mm, and the minute areas are preferably arranged in the order of the color change temperatures as shown in the figure. If it does, it does not have to be in the order of discoloration temperature.

FIG. 2 shows an example of a means for adhering the temperature-indicating paint in various minute areas to the surface of the temperature-measured object 1. This means can be a coating roller 3 whose surface is divided into minute regions, and temperature-indicating paints having different discoloration temperatures are independently supplied to each minute region.

Further, as a means for adhering the temperature-indicating paint, a paper in which the temperature-indicating paints having different discoloring temperatures are applied or printed by dividing into minute regions can be wound in a roll shape. In this case, as shown in the partial cross section of FIG. 3, the temperature-indicating paint 2 having a different discoloration temperature is two-dimensionally applied to the surface of the base paper 4 and the adhesive 5 is applied in advance to the back surface. Has been done. The surface of the adhesive 5 is covered with a protective film 6 as needed before use.

FIG. 4 shows an apparatus for measuring the surface temperature distribution, which is carried out after an operation test of the radial type supercharger in which the temperature-indicating paint 2 is attached to the surface of the temperature measurement object 1. In the figure, 7 is a reading device, 8 is an A / D converter, 9 is a computing device, and 10 is a display device which can be a display, a printer or a plotter.

On the surface of the temperature measurement object 1, the color change state of the temperature indicating paint 2 after the test is read by the reading device 7. At this time, the temperature-indicating paint 2 is divided into blocks and read. For example, as shown in FIG. 5, the minute area is divided into 2.5 mm squares, and this is read for each block with 4 vertical and horizontal areas (16 areas in total) as one block. The read color data is converted into a digital signal by the A / D converter 8 and input to the arithmetic unit 9.

The computing device 9 computes the average temperature of each read 10 mm square block, computes the isotherm at 10 ° C. or 20 ° C. intervals from these average temperatures, and displays the temperature distribution of the object surface on the display device 10 Display at. As a result, it becomes possible to grasp the surface temperature of the object two-dimensionally.

[0014]

[Effect of the device]

 According to the present invention, by using the coating roller or the temperature-sensitive paint paper, the temperature-sensitive paint having a plurality of different discoloration temperatures in each minute region can be continuously applied according to the surface shape of the temperature-measured object. , It became possible to estimate the temperature for each micro area, and it became possible to grasp the object surface temperature two-dimensionally. After the test, the two-dimensional temperature distribution can be grasped in a short time by reading the degree of color change of each block of the paint and organizing the data with a computer.

Further, the device according to the present invention can measure the temperature in a high temperature, high pressure, and rotating atmosphere, does not require wiring like a thermocouple method, and can save manpower and cost required for the measurement work. Become.

[Brief description of drawings]

FIG. 1 is a diagram showing a two-dimensional application example of temperature-indicating paint by the device of the present invention.

FIG. 2 is a view showing a two-dimensional temperature-indicating paint coating roller of the device according to the present invention.

FIG. 3 is a view showing a partial cross section of temperature-sensitive paint paper.

FIG. 4 is a system diagram showing a configuration of an apparatus according to the present invention.

FIG. 5 is an explanatory view showing a reading method in the reading device of the device of the present invention.

FIG. 6 is a diagram showing a linear application example of a conventional temperature-indicating paint.

FIG. 7 is a diagram showing a linear application example of a conventional temperature-indicating paint.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Temperature-measured object 2 Temperature-sensitive paint 3 Application roller 7 Reader 8 A / D converter 9 Computing device 10 Display device

Claims (1)

[Scope of utility model registration request] 1. A means for attaching a plurality of temperature-indicating paints to the surface of a temperature-measuring unit by dividing them into minute regions, or a paper on which a plurality of temperature-indicating paints are divided into minute regions and applied to the surface of a temperature-measuring unit. And a device that reads the color of the temperature-indicating paint by dividing it into minute blocks, and a computing device that converts the read color into temperature and obtains the average temperature of each block to obtain the surface temperature distribution of the temperature measurement target. And a device for displaying the obtained surface temperature distribution.