JP2003270049A - Two-dimensional radiation thermometer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To display an image of measurement result in which a picked-up image of a body to be measured is superimposed, in accurate locational relation, on a temperature distribution display on the body to be measured. <P>SOLUTION: This two-dimensional radiation thermometer is provided with a temperature detecting part 3 having a plurality of noncontact temperature detecting sensors arranged in a specific arrangement pattern for individually detecting the temperature of the body to be measured within a measuring area, an image pickup part 4 for picking the image of the measuring area, an optical part 2 for outputting incident light B0 to both the temperature detecting part 3 and the image pickup part 4, and a display control part 5 acquires the image of measurement results by superimposing the image picked up by the image pickup part 4 on the temperature distribution display in which temperature displays each corresponding to temperatures detected by the temperature detecting part 3 are arranged according to the arrangement pattern, and displays the image of measurement results on a display part 6. The optical part 2 is constituted in such a way as to distribute the incident light B0 in two directions. The plurality of noncontact temperature detecting sensors are arranged so as to receive the distributed incident light B0. The image pickup 4 is arranged so as to receive the distributed incident light B0. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a two-dimensional radiation thermometer capable of displaying a measurement result image obtained by superimposing a temperature distribution display on an image of a measurement object.

[0002]

2. Description of the Related Art As a two-dimensional radiation thermometer of this type, FIG.
A two-dimensional radiation thermometer 51 shown in (1) is conventionally known.
The two-dimensional radiation thermometer 51 includes a temperature detection unit 52 having a sensor array configured by arranging a plurality of infrared sensors for detecting the temperature of a measurement object without contact, and a camera for imaging the measurement object. And the like, and a display control for displaying a measurement result image G (see FIG. 6) in which the temperature distribution display relating to the temperature detected by the temperature detecting unit 52 is superimposed on the image captured by the image capturing unit 53 on the display unit 6. And a section (not shown). In this case, the temperature detector 5
The second sensor array is configured by arranging each infrared sensor in a matrix of 8 rows and 8 columns, and each infrared sensor individually detects the temperature of the measurement object. In addition, the display control unit,
A temperature distribution display 12 composed of rectangular frame-shaped temperature display marks M, M ... (See FIG. 6) whose display colors are different according to the temperature detected by each infrared sensor is displayed as a temperature display. In the figure, the difference in display color of the temperature display mark M is conceptually illustrated by the thickness of the line.

When the two-dimensional radiation thermometer 51 is used to perform temperature measurement using, for example, the wall 21 having the same temperature as the outside air temperature and the spherical body 22 having a temperature higher than the wall 21, the measurement object. First, the wall 21 and the spherical body 22 are imaged by the imaging unit 53. At the same time, the temperature detector 52 detects the temperature of each part of the wall 21 and the spherical body 22. At this time, the display control unit, as shown in FIG. 6, displays the temperature display marks M, M, ... Corresponding to the temperature detected by the temperature detection unit 52 in the array pattern of the infrared sensors (in this case, 8 rows and 8 columns). The temperature distribution display 12 is generated by arranging according to the matrix form of FIG.
The image 11 (wall surface 11a of the wall 21 and the planar shape 11b of the spherical body 22) captured by is superimposed. As a result, the measurement result image G is displayed on the display unit 6, and the temperature distribution of each part of the wall 21 and the spherical body 22 can be recognized by the measurement result image G.

[0004]

However, the conventional two-dimensional radiation thermometer 51 has the following problems. That is, in the conventional two-dimensional radiation thermometer 51, the temperature detecting unit 52
The measurement result image G is displayed by superimposing the temperature distribution display 12 based on the temperature detected by the image 11 captured by the imaging unit 53. In this case, as shown in FIG. 5, in the two-dimensional radiation thermometer 51, the temperature detecting unit 5
2 and the imaging unit 53 are separated by the distance L, the optical axis X2 of the temperature detection unit 52 and the optical axis X3 of the imaging unit 53.
And a shift of the distance L (parallax) occurs. Therefore,
For example, when the optical axis X3 of the imaging unit 53 is aligned with the central portion of the spherical body 22, the optical axis X2 of the temperature detecting unit 52 is deviated from the central portion of the spherical body 22 by a distance L, as shown by the broken line in the figure. It fits in the correct position. For this reason, a large deviation occurs between the center of the measurement area A2 by the temperature detection unit 52 and the center of the imaging area A3 by the imaging unit 53. In this state, when the temperature distribution display 12 based on the temperature detected by the temperature detecting unit 52 is superimposed on the central portion of the image 11 captured by the image capturing unit 53, as shown in FIG. The temperature display marks M (for example, the temperature display marks Ma, Mb ...) Representing the temperature of the wall surface 1 deviate largely from the planar shape 11b in the image 11.
As a result of being superposed on 1a, the measurement result image G in which the wall surface 11a is extremely hot is displayed. In this case, the image 1 caused by the parallax of the temperature detection unit 52 and the image pickup unit 53
1 and the deviation amount of the temperature distribution display 12 become larger as the distance between the two-dimensional radiation thermometer 51 and the measurement object is smaller. As described above, the conventional two-dimensional radiation thermometer 51 has a problem that a large positional deviation occurs between the image 11 and the temperature distribution display 12 due to the parallax of the temperature detection unit 52 and the imaging unit 53. .

The present invention has been made in view of the above problems, and displays a measurement result image in which an image of a measurement object and a temperature distribution display of the measurement object are superimposed in an accurate positional relationship. The main purpose is to provide a possible two-dimensional radiation thermometer.

[0006]

In order to achieve the above object, the two-dimensional radiation thermometer according to claim 1 is arranged in a predetermined arrangement pattern and individually detects the temperature of the measurement object in the measurement area. A temperature detecting unit having a plurality of non-contact temperature detecting sensors, an image capturing unit that captures at least the measurement area, an optical unit that outputs incident light to the temperature detecting unit and the image capturing unit, and an image captured by the image capturing unit. And a display control unit for displaying a measurement result image on the display unit by superimposing a temperature distribution display in which each temperature display corresponding to each of the temperatures detected by the temperature detection unit is arranged corresponding to the arrangement pattern. In the two-dimensional radiation thermometer, the optical unit is configured to be capable of distributing the incident light in two directions, and the plurality of non-contact type temperature detection sensors are distributed. Are respectively capable receiving position the one of the incident light, the imaging unit is receivable position the other of said distributed incident light.

The two-dimensional radiation thermometer according to a second aspect is the two-dimensional radiation thermometer according to the first aspect, wherein the display control unit has at least one of display color, gradation, display size and display shape. The measurement result image is displayed with the temperature display mark, which is made different according to the detected temperature of each of the non-contact type temperature detection sensors, as the temperature display.

[0008]

DETAILED DESCRIPTION OF THE INVENTION A two-dimensional radiation thermometer according to the present invention will be described below with reference to the accompanying drawings.

The two-dimensional radiation thermometer 1 is a non-contact type temperature measuring device constructed so that a temperature distribution display relating to the temperature measured with respect to the object to be measured can be superimposed and displayed on an image taken of the object to be measured. As shown in FIG. 1, the optical unit 2, the temperature detection unit 3, the imaging unit 4, the display control unit 5, the display unit 6, the operation unit 7, and the control unit 8 are provided. As shown in FIG. 2, the optical unit 2 includes a lens group 2a that collects incident light B0 from the outside and a lens group 2a.
The prism group 2b which distributes the incident light B0 condensed by the two directions. In this case, the prism group 2b
Is formed by combining, for example, two prisms, divides the incident light B0 into the incident light B1 and the incident light B2, outputs one of the incident light B1 by going straight, and outputs the other incident light B2. The output is made by going straight in a direction inclined by 45 degrees with respect to the path of. The temperature detection unit 3 includes a sensor array 3a that detects the temperature of the measurement object, and a signal processing circuit 3b that processes the sensor signal Ss output by the sensor array 3a and outputs the detected temperature data Dt. . In this case, the sensor array 3a has, for example, 8 rows and 8 rows.
The temperatures of the objects to be measured (as an example, the wall 21 and the spherical body 22 in the measurement area A2 shown in FIG. 3) arranged in a matrix of rows (an example of a predetermined arrangement pattern in the present invention) in the measurement area are individually set. Equipped with 64 infrared sensors (specifically, a thermopile that is a non-contact type temperature detection sensor) for detecting the temperature. In addition, the sensor array 3a
2 is arranged in the path of the incident light B1 so that the incident light B1 distributed by the prism group 2b of the optical unit 2 can be received.

Under the control of the control unit 8, the image pickup unit 4 generates image data Dg by picking up an image of the measurement object in the image pickup area including the measurement area A2 (as an example, the image pickup area A3 shown in FIG. 3). Output. In this case, in the two-dimensional radiation thermometer 1, as an example, a plurality of photoelectric conversion elements (C-
A camera equipped with an autofocus mechanism as well as a MOS device and a CCD) has been adopted. In addition, the imaging unit 4
Is arranged in the path of the incident light B2 so that the incident light B2 distributed by the prism group 2b of the optical unit 2 can be received. The display control unit 5 measures the measurement result image G (see FIG. 4) based on the detected temperature data Dt output by the temperature detection unit 3 and the image data Dg output by the imaging unit 4.
Is generated on the display unit 6 to generate a display signal Sh. The display unit 6 is composed of, for example, a liquid crystal monitor in which a color liquid crystal panel and a backlight are packaged, and displays the image 11 captured by the image capturing unit 4 and the measurement result image G under the control of the display control unit 5. To do. Operation part 7
Has a power button and a start button for instructing the start of measurement. The control unit 8 controls operations of the temperature detection unit 3, the imaging unit 4, the display control unit 5, and the like according to an instruction input via the operation unit 7.

Next, a method of measuring the temperature of the measuring object using the two-dimensional radiation thermometer 1 will be described with reference to the drawings.

For example, as shown in FIG. 3, when performing temperature measurement using the wall 21 and the spherical body 22 as the measurement object, first, the two-dimensional radiation thermometer is set so that the optical unit 2 faces the wall 21. Move 1 At this time, as shown in FIG. 2, the lens group 2a of the optical unit 2 collects the incident light B0 (light reflected or emitted by each part of the wall 21 and the spherical body 22), and the prism group 2b is formed. , The condensed incident light B0 is divided into incident light B1 and incident light B2. At this time, the imaging unit 4
Receives the incident light B2 and outputs image data Dg for the wall 21 and the spherical body 22. Next, the display control unit 5 generates the display signal Sh based on the image data Dg output by the image capturing unit 4 and outputs the display signal Sh to the display unit 6, so that the image 11 (in the measurement result image G shown in FIG. The state where the temperature distribution display 12 is not displayed) is displayed on the display unit 6. Subsequently, the operator moves the two-dimensional radiation thermometer 1 so that the planar shape 11b (spherical body 22) is displayed in the center of the display unit 6 while referring to the image 11 displayed on the display unit 6. Thereby, as shown in FIG. 3, the optical axis X1 of the optical section 2 is aligned with the center of the spherical body 22.

Next, when the operator operates the start button, the control section 8 causes the temperature detection section 3 to start temperature measurement. At this time, each infrared sensor of the sensor array 3a detects the infrared rays contained in the incident light B1 distributed by the prism group 2b of the optical unit 2, and processes the sensor signal Ss regarding the detected temperature. Output to the circuit 3b. Further, the signal processing circuit 3b uses the sensor signals Ss, Ss.
・ By performing predetermined signal processing for
The detected temperature data Dt, Dt ... Are sequentially output to the display controller 5. In this case, the detected temperature data Dt is output in association with the temperature detected by each infrared sensor and the array position of the infrared sensor detecting the temperature. In response to this, the display control unit 5 displays each temperature display mark M, M ... Which should be displayed as the temperature distribution display 12 based on the detected temperature data Dt output by the temperature detection unit 3.
Determine the display color of.

Next, the display control unit 5 superimposes the temperature distribution display 12 corresponding to the measurement area A2 measured by the temperature detection unit 3 on the image 11 corresponding to the imaging area A3 captured by the imaging unit 4. The display signal Sh for the measurement result image G is generated and output to the display unit 6. In this case, the optical axis X1 of the sensor array 3a and the optical axis X1 of the imaging unit 4 are common. Therefore, the centers of the measurement area A2 and the imaging area A3 coincide with each other. Therefore, the image 11 in the measurement result image G and the temperature distribution display 1
2 and 2 are superposed in a precise positional relationship. This allows
As shown in FIG. 4, temperature display marks M (for example, temperature display marks Ma, Mb ...
And the like) are superimposed on the planar shape 11b of the image 11 in an accurate positional relationship, and the measurement result image G is displayed on the display unit 6.

As described above, according to the two-dimensional radiation thermometer 1, the optical section 2 is configured so that the incident light B0 can be distributed in two directions, and the sensor array 3a can receive the distributed incident light B1. The image pickup unit 4 is arranged so as to be able to receive the distributed incident light B2 and arrange the image 1 based on the incident light B0.
By generating 1 and the temperature distribution display 12, unlike the conventional two-dimensional radiation thermometer 51, the image 11 and the temperature distribution display 12 have an accurate positional relationship without causing a shift due to parallax. The superimposed measurement result image G can be displayed on the display unit 6. Therefore, the operator can accurately recognize the temperature distribution of each part of the wall 21 and the spherical body 22. Further, according to the two-dimensional radiation thermometer 1, the display control unit 5 displays the measurement result image G with the temperature display mark M having a different display color corresponding to the detected temperature of each infrared sensor as the temperature display. Due to
For example, the temperature distribution of each part of the measurement object can be intuitively recognized as compared with the method of displaying the measured temperature by a numerical value.

The present invention is not limited to the configuration according to the above-described embodiment of the present invention. For example, in the two-dimensional radiation thermometer 1 according to the embodiment of the present invention, the incident light B0 is 2
Although the optical unit 2 is configured by including the prism group 2b as means for distributing in the direction, a half mirror can be used instead of the prism group 2b, and the shape and number of prisms and half mirrors to be used are also particularly limited. Not done. Further, in the embodiment of the present invention, an example in which the image pickup unit 4 is configured by a camera provided with an autofocus mechanism has been described, but instead of this, a single focus camera is adopted, and the optical unit 2 is provided with an autofocus mechanism. The two-dimensional radiation thermometer 1 can also be provided. Further, in the embodiment of the present invention, an example has been described in which the temperature display mark M in which the display color is changed corresponding to the measured temperature is displayed as the temperature display. However, for example, when the display unit 6 is a monochrome liquid crystal. The gradation of the temperature display mark M, the line thickness or line type, and the display size (the size of the mark to be displayed according to the measured temperature) can be changed and displayed according to the measured temperature. Further, the temperature display mark M is not limited to the rectangular frame shape, and it is possible to display the temperature display using various marks whose display shapes are changed corresponding to the measured temperature. In addition, although the two-dimensional radiation thermometer including the display unit 6 has been described in the embodiment of the present invention, the present invention is not limited to this, and the display signal Sh for displaying the measurement result image G is externally output. It can also be configured to output to a display device.

[0017]

As described above, according to the two-dimensional radiation thermometer according to the first aspect of the invention, the optical portion is configured so that the incident light can be distributed in two directions, and one of the distributed incident light can be received. By arranging a plurality of non-contact type temperature detection sensors in each and the imaging unit that can receive the other of the distributed incident light, the temperature distribution display showing the temperature of each part in the measurement area and the measurement in the image It is possible to display a measurement result image in which the display range corresponding to the area is superimposed on the display unit in an accurate positional relationship. As a result, the temperature distribution of each part of the measurement object can be recognized accurately.

According to the two-dimensional radiation thermometer of the second aspect, at least one of the display color, gradation, display size, and display shape is different depending on the detected temperature of each non-contact temperature detection sensor. By displaying the measurement result image as the temperature display using the displayed temperature display mark, it is possible to intuitively recognize the temperature distribution of each part of the measurement target object as compared with the numerical value temperature display, for example. .

[Brief description of drawings]

FIG. 1 is a two-dimensional radiation thermometer 1 according to an embodiment of the present invention.
3 is a block diagram showing the configuration of FIG.

FIG. 2 is a block diagram showing configurations of an optical unit 2, a temperature detection unit 3 and an image pickup unit 4.

FIG. 3 is a two-dimensional radiation thermometer 1 according to the embodiment of the present invention.
3 is an external perspective view showing the relationship between the imaging area A3 and the measurement area A2 according to FIG.

FIG. 4 is a two-dimensional radiation thermometer 1 according to the embodiment of the present invention.
6 is a display screen diagram showing an example of a measurement result image G displayed by FIG.

FIG. 5 is an external perspective view showing a relationship between an imaging area A3 and a measurement area A2 by a conventional two-dimensional radiation thermometer 51.

FIG. 6 is a display screen view showing an example of a measurement result image G displayed by a conventional two-dimensional radiation thermometer 51.

[Explanation of symbols]

One-dimensional radiation thermometer 2 Optics 2a lens group 2b prism group 3 Temperature detector 4 Imaging unit 5 Display controller 6 Display 11 images 12 Temperature distribution display B0, B1, B2 incident light G measurement result image M temperature display mark

Claims (2)

[Claims] 1. A temperature detection unit having a plurality of non-contact type temperature detection sensors arranged in a predetermined arrangement pattern and individually detecting the temperature of a measurement object in a measurement area, and an image pickup device for imaging at least the measurement area. Section, an optical section that outputs incident light to the temperature detecting section and the image capturing section, and an image captured by the image capturing section and temperature displays corresponding to the temperatures detected by the temperature detecting section, respectively. A two-dimensional radiation thermometer including a display control unit that causes a display unit to display a measurement result image on which a temperature distribution display arranged corresponding to a pattern is superimposed, wherein the optical unit is configured to emit the incident light in two directions. And the plurality of non-contact type temperature detection sensors are respectively arranged so as to be able to receive one of the distributed incident light, and the imaging unit is configured to 2D radiation thermometer which is receivable arranged the other incident light. 2. The display control unit includes a temperature display mark in which at least one of a display color, a gradation, a display size, and a display shape is made to correspond to a detected temperature of each of the non-contact temperature detection sensors. The two-dimensional radiation thermometer according to claim 1, wherein the measurement result image is displayed as a temperature display.