JPS6123930A - Two-dimensional scanning infrared radiation temperature display device - Google Patents

Abstract

PURPOSE:To make the shape of a body to be detected and the position of a diagnosed and measured part, etc., in the objective body clear by displaying the temperature of the objective body with predetermined colors corresponding to the temperature distribution and also displaying the contour of the objective body together with the temperature. CONSTITUTION:A reference temperature signal corresponding to set reference temperature is stored in a latch circuit 10. The objective body and its background are scanned in two dimensions with infrared rays and a temperature signal based upon infrared-ray radiation is stored in an image memory 6 through an A/D converter 2 and a buffer memory 4. Further, a temperature information signal which is one horizontal scanning period before is stored in a buffer memory 15 and temperature information which is one horizontal sampling point before is stored in a latch circuit 7. The signals stored in the memory 15 and circuit 7 and the reference temperature signal from the circuit 10 are compared by comparators 16 and 8, whose results are stored in a graphic memory 18 through a dot drawing address gate 13. The output signals of the memories 6 and 18 are supplied to a CRT to make the shape and position of diagnosed and measured part, etc., clear.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a two-dimensional scanning infrared radiation temperature display device that displays the temperature distribution of a subject in colors, for example, on the tube surface of a color cathode ray tube.

Background technology and its problems Generally, the temperature of the object to be examined is displayed by displaying a predetermined color corresponding to the temperature on the tube surface of a color cathode ray tube2.
Dimensional scanning infrared radiant temperature display devices have been proposed. Such a conventional two-dimensional scanning infrared radiation temperature display device can observe the temperature distribution of a subject on the tube surface of a color cathode ray tube, and can perform various diagnoses and measurements.

However, when there is not much temperature difference between the subject and the background, the inside of the subject and the background are expressed in similar colors on the tube surface of the color cathode ray tube, and in this case, the subject and the background are There are disadvantages in that the shape of the object cannot be identified, the shape of the object is unclear, and the position of the measuring section within the object is unclear.

OBJECTS OF THE INVENTION In view of the above, an object of the present invention is to improve the above-mentioned disadvantages.

Summary of the Invention The present invention provides a two-dimensional scanning infrared radiation temperature display device that displays the temperature of a subject using predetermined colors corresponding to the temperature distribution. The object is also displayed so that the object to be examined and the background can be distinguished, the shape of the object to be examined is made clear, and the position of the diagnostic, measuring section, etc. within the object is made clear.

Embodiment Hereinafter, one embodiment of the two-dimensional scanning infrared radiation temperature display device of the present invention will be described with reference to the drawings.

In FIG. 1, (1) indicates a temperature signal input terminal to which a temperature signal is supplied. The temperature signal supplied to this temperature signal input terminal (1) is obtained by sequentially two-dimensionally scanning the subject with infrared rays in the horizontal and vertical directions, similar to the temperature signal of a well-known two-dimensional scanning infrared radiation temperature display device. This is an analog signal as shown in FIG. 2, which is obtained by sequentially converting signals corresponding to the infrared radiation temperature into electrical signals. The temperature signal supplied to the temperature signal input terminal (1) is supplied to an analog-digital conversion circuit (2) that converts it into, for example, an 8-bit digital signal. The output signal of this analog-digital conversion circuit (2) is supplied to the temperature information about one point, that is, the 8-pit latch circuit (3), and this analog-
An EOC signal indicating that the digital conversion circuit (2) has outputted a 1-word or 8-bit signal is supplied to the latch circuit (3), and the latch circuit (3) outputs the EOC signal every time the EOC signal is supplied. Do as you will.

The output signal of this latch circuit (3) is supplied to a backup memory (4) having a storage capacity for one horizontal scanning period.

(5) indicates an address generator, and the address signal obtained at the output side of this address generator (5) is supplied to this buffer memory (January 4) and also to an image memory (6) having a storage capacity of one screen. , the output signal of this buffer memo 41 is stored in a predetermined position of this image memo 6) every horizontal scanning period. The output signal of this image memo (January 6) is supplied to a color cathode ray tube (not shown) via a color conversion circuit. The output signal of this image memo (January 6) is supplied to a color cathode ray tube via a color conversion circuit, and a color corresponding to the temperature signal is displayed on the tube surface of the color cathode ray tube. It is configured in the same way as the temperature display device.

In this case, in this example, the predetermined temperature range of the temperature signal is 64
The temperature is divided into equal parts, and the highest temperature within the range is assigned pink, the middle temperature is assigned green, and the lowest temperature within the range is assigned blue, so that there is a continuous color tone between them.

In this example, the output signal of the latch circuit (3) is supplied to the temperature information about one point, that is, the 8-pit latch circuit (7), and the E of the analog-digital conversion circuit (2) is supplied.
The OC signal is supplied to this latch circuit (7), and the EOC with
Each time a signal is supplied, the latch circuit (7) supplies an output signal to one terminal of the comparator circuit (8). In addition, the output signal of the latch circuit (3) is transferred to the comparison circuit (8).
). (91 indicates a reference temperature signal input terminal to which a digital signal corresponding to a reference temperature Tα preset to correspond to a temperature between the temperature of the subject and the background temperature is supplied in the central processing unit; The reference temperature signal supplied to the reference temperature signal input terminal (9) is connected to the latch circuit (1
01, and this reference temperature signal is stored in the latch circuit section. The reference temperature signal stored in this latch circuit α0) is supplied to the comparison circuit (8). In this comparison circuit (8), the two-dimensional scanning of infrared rays for the subject aD and its background (12+) is as shown in FIG. 3A, and the sampling in the analog-digital conversion circuit (2) The point is (iti), (
1,2)...(i-1,D, ni, 1)...
・(I IIJ 1), (IIJ 1)...
・When (i-x, j), (i, j)..., adjacent sampling points in the horizontal direction (11
, J) and (IIJ), the temperature Tl of each corresponding part
1 + j, TI t j, and this is shown in Figure 3B.
As shown in , it is determined whether the temperature change at the adjacent sampling points crosses the reference temperature Tα, that is, TI ”+j
＞Tα＞Ti,j...(11Ti"I
J <Tα<TI y J... (2) is judged, and when the condition of equation (1) is satisfied, this comparison circuit (8
), the signal at point (1"IJ) is supplied as a pointillist signal to the pointillist address gate circuit (131), and when the condition of equation (2) is satisfied, the signal at point (i+j) is pointillized from this comparison circuit (8). It is supplied as a signal to the pointillist address gate circuit (13I) via the OR circuit αa.

The output signal of the latch circuit (3) is also supplied to a buffer memory (15+) having a storage capacity for the second horizontal scanning period.This buffer memory αS is The point before the horizontal scanning period (II
Temperature information signal Ti of J1) and j-1 are supplied to the comparison circuit (161). The address generator indicates an address generator, and the buffer memory (151 indicates write and The latch circuit (3)
The output signal of the temperature information TI+J of is supplied to the comparison circuit αe, and the reference temperature signal of the reference temperature Tα stored in the latch circuit (1 (IK) is supplied to this comparison circuit (161).

In this comparison circuit (2), the temperature TI+J of the corresponding portions of the vertically adjacent sampling points (IIJ1) and (iyJ) in the two-dimensional infrared scanning as shown in FIG. 3A is calculated. , TLJ, and determines whether the temperature changes at these adjacent sampling points have crossed the reference temperature Tα, as shown in FIG.
1) Tα〉Ti, j ・・・・・・(3) Ti
, j−1<Tα<Ti, j (
4), and when the condition of equation (3) is satisfied, the signal at point ('IJ'') is supplied from this comparison circuit (IQ) as a pointillist signal to the pointillist address gate circuit Q31, and the condition of equation (4) is satisfied. When this is satisfied, the point (i, D
The signal is supplied as a pointillist signal to the pointillist address gate circuit U via the OR circuit α4. Further, the address signal of the address generator (171) is supplied as a gate signal to the pointillist address gate circuit αJ, and the address signal of this address generator (17'l) is supplied to the graphic memory (181) having a storage capacity corresponding to one screen. In the graphic memory t181, the pointillist signals from the pointillist address gate circuit ¥6a31 are sequentially stored at predetermined addresses.This graphic memory a8
The stipple signal of the first output signal is converted into a black signal corresponding to black, for example, and is supplied to a color cathode ray tube that displays this temperature.

The operation shown in FIG. 1 will be explained with reference to FIG. 4. In this example, a reference temperature Tα is set in advance by the central processing unit, and an f reference temperature signal corresponding to this reference temperature Tα is stored in the latch circuit αα. This reference temperature Tα can be changed as necessary.

In this example, the subject (ill and back 1f121) as shown in FIG. The output signal of this analog-to-digital conversion circuit (2) is supplied to the image memory (6) via the buffer memory (4), and the output signal of this image memo (January 6) is Therefore, the color cathode ray tube displays the object (Ill) in a color corresponding to the temperature of the object (1).
Display. Therefore, in this case, it is possible to know the temperature distribution state of the subject aII, and from this it is possible to perform measurements, diagnoses, etc. of the subject 011.

In addition, in this example, as shown in FIG.
J (151K) The buffer memory IJ Q51 stores the signal from one horizontal scanning period ago and outputs the temperature information signal TI+J from one horizontal scanning period ago, and also outputs the temperature information signal TI+J from the buffer memory IJQ51 by latch circuit (
7) is the temperature information signal T one sampling point earlier in the horizontal direction.
l-1+J is stored and outputted, and in the comparison circuit (8), the input temperature information signal TizJ
, Ti 1. j s Tα, formula (1) and formula (
2) Tit, j>Tα>Ti,j and ``'IJ<Tα<Ti,j, and when the condition of equation (1) is satisfied, the point (+-11J
) to a predetermined address of the graphic memory a81 via the pointillist address gate circuit 03. Also, when the condition of equation (2) is satisfied, the dot signal at point (i, j) is written to a predetermined address in the graphic memory a& via the dot address gate circuit a3. Furthermore, in the comparator circuit ae, the input temperature information signal T15j''
, Ti, j, and Tα to perform a comparison operation of Ti, jl>Tα) Ti, j and Ti, jl<Tα<Ti, j in equations (3) and (4), and the condition of equation (3) is When it satisfies the point (xtj”), the point (
131 to a predetermined address in the graphic memory a&, and when the condition of equation (4) is satisfied, the point (I
The pointillist signal of IJ) is written to a predetermined address of the graphic memory α& via the pointillist address gate circuit a3.

No other points are written to the graphic memory IJ (181).When the output signal of this graphic memory a& is supplied to a color cathode ray tube, the curve (A) in FIG.
The outline of the object (111) as shown in lla) is displayed in black, for example.

As described above, according to this example, the subject 11il is displayed in a color corresponding to the temperature of the subject (111), and the outline (lla) of this subject aII is also displayed. Therefore, the subject αυ and Even if the temperature difference from the background az is small, by selecting the reference temperature Tα, the shape of the object 1 can be clearly displayed, the object 011 and the background can be distinguished, and the object (111) can be clearly displayed. The location of the diagnostic and measurement parts, etc. can be clarified.Especially when performing high-sensitivity measurements on a part of the object U, when the temperature signal is amplified, the temperature of the outer periphery of the object U is below the temperature display range. The temperature becomes , which cannot be displayed, and the shape of the subject Qll becomes unclear, and the position of the measurement part becomes unclear. According to this example, even in this case, the contour line (lla) of the subject J This has the advantage that the position of the shape measurement part of the object (Il+), etc. is clearly displayed.

It goes without saying that the present invention is not limited to the above-described embodiments, and can take various other configurations without departing from the gist of the present invention.

Effects of the Invention According to the present invention, the outline of the subject aII is displayed at the same time as the temperature display, so that the subject 01; and the background az can be distinguished, the shape of the subject αB becomes clear, and this object There is a clear benefit in the position of the diagnostic, measuring section, etc. in the sample fi11.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the two-dimensional scanning infrared radiation temperature display device of the present invention, and FIGS. 2, 3, and 4 are diagrams for explaining the present invention, respectively. (,1) is a temperature signal input terminal, (6) is an image memory, (
7) and 00) are latch circuits, (8) and (161) respectively.
01 is a comparison circuit, 01 is a reference temperature signal input terminal, and 01 is a reference temperature signal input terminal.
1 is the subject, Q21 is the background, 115+ is the buffer memory, and (181 is the graphic memory).

Claims (1)

[Claims] In a two-dimensional scanning infrared radiation temperature display device that displays the temperature of the subject using predetermined colors corresponding to the temperature distribution, it is possible to display the outline of the subject at the same time as displaying the temperature. A two-dimensional scanning infrared radiation temperature display device characterized by: