JPH07159243A - Infrared temperature measuring apparatus - Google Patents

Abstract

PURPOSE:To realize subtle temperature measurement by reading out mark information and temperature information from a memory means at the scanning timing of a monitor television and displaying the information simultaneously thereby designating the point to be measured accurately. CONSTITUTION:An infrared image signal from a camera 10 is amplified by an amplifier 11 and fed to an A/D converter 12. The converted signal is fed to a linearization circuit 13 where it is further converted into a temperature data and stored at a memory section 14. The digital signal (temperature data) is read out from the memory section 14 at the timing of a sync signal generating circuit 15 in response to the scanning of a monitor TV 20. The digital signal is superposed by a specific mark and character information read out from a mark display memory means 16 and temperature display memory means 17 comprising overlay memories, for example, and then it is fed to a D/A converter 18. An analog image signal is delivered from the converter 18 to the TV 20 through an image signal converting section 19 and an infrared image is presented, along with the mark and a numeric value of temperature, on a display section 21.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an infrared temperature measuring device, and more particularly to an infrared temperature measuring device capable of measuring temperature changes with time at arbitrary points of an object to be measured.

[0002]

2. Description of the Related Art Each point on an object to be measured is scanned horizontally and vertically, infrared rays emitted from the object to be measured are electrically detected by an infrared detector, and a display device such as a cathode ray tube according to the signal intensity. There is a measuring device configured to measure the projected image as a video and quantitatively and qualitatively the projected image.

Such an apparatus is effective in analyzing the temperature distribution pattern of the object to be measured as a whole, but in analyzing the temporal elements, it depends on the gradation of continuously projected images. Not only can it be measured, but it is impossible to analyze the change over time of a specific site in the temperature distribution pattern.

Therefore, in the multi-point temperature display device disclosed in Japanese Patent Publication No. 62-46818, a digital infrared image signal is written in a memory, the digital infrared image signal read from the memory is processed, and a monitor is performed as shown in FIG. It is displayed on the display unit 1 of the TV.

Then, by moving the horizontal cursor 3 and the vertical cursor 4 displayed in the image area 2 to any position in the infrared image (not shown) displayed in the image area 2 of the display unit 1 with a joystick or the like, By designating as the intersection 5 of both cursors, the position coordinates of the designated point 5 are held in the register.

Then, in order to distinguish the designated point 5 from other designated points, the position coordinates accumulated in the register are latched by the switch for latching with the same number of pixels as the memory in the depth direction 1.
Bit specified point position memory and specified point character memory 2
The logical value 1 is stored in the address position of the designated point 5 by being transmitted to the frame memory.

In the designated point position memory, a memory space for displaying the designated point 5 in order to distinguish it from other designated points and displaying a character or numeral 6 for distinguishing the designated point is prepared. The character 6 is stored in this memory space.
The code for displaying is stored.

In the designated point character memory, a memory space for storing an address for displaying the character 6 for identifying the designated point 5 in the vicinity of the designated point 5 is prepared, and the display address of the character 6 is prepared. Is stored.

After setting the position coordinates, the character data and the character address of a plurality of points in the two memories in this way,
By reading the contents of both memories at the television scanning timing and adding them to the character generating section, a plurality of designated points are displayed as bright points in the infrared image, and designated point distinguishing character codes are displayed near these designated points.

As for the temperature information at these designated points, when the logical value "1" is read out simultaneously from both memories during the scanning process of the television image signal, the digital infrared image signal at the address position is read out from the memories and temporarily stored. It is stored and sequentially read out when an address corresponding to a predetermined position is applied at the television scanning timing, added to the character generating portion, and displayed as a numerical value 8 at a predetermined position 7 on the screen of the monitor television. ing.

With this configuration, it is possible to simultaneously display numerical values of the temperatures at arbitrary plural points in the image showing the temperature distribution of the object to be measured on the monitor television screen, and it is easy to maintain the temperature at plural points of the object to be measured. Has the advantage of being measurable.

[0012]

However, the above-mentioned conventional apparatus has the following problems. That is, when it is desired to display an infrared image on the display unit 1 and observe the image to know the temperature values at a plurality of points in the peculiar temperature region in the image, the designated point position memory and the designated point character memory are designated with the designated point position Because the designated point distinguishing character code for distinguishing the designated point from other designated points and the character address information for displaying the character code near the designated point on the image are stored near the designated point position. However, since a considerable memory space is required to display each point, it is not possible to specify the neighboring points in the area, and there is a drawback that the temperature at a plurality of points in the fine area cannot be measured.

[0013]

The present invention has been made in view of the above-mentioned drawbacks, and a digital infrared image signal obtained by horizontally and vertically scanning an object to be measured is written in a memory, and a digital infrared signal read from the memory is read. In an infrared temperature measuring device for displaying an infrared video signal as a video on a monitor television, a means for storing a plurality of marks different in display form in the video, a mark selecting means for selecting the plurality of marks, and a plurality of the plurality of marks. A plurality of mark display storage means for storing the marks associated with the marks and selected by the mark selection means and read from the mark storage means, and a position for positioning the selected marks at an arbitrary position in the image Designating means, means for extracting the digital infrared image signal at the designated position from the memory section; The digital infrared image signal from the output means is converted into a numerical value, and the temperature display storage means for storing the numerical data from the conversion means in a predetermined position corresponding to the plurality of marks, The mark information and the temperature information of the mark display storage means and the temperature display storage means are read according to the scanning timing of the monitor television and displayed simultaneously in the image.

[0014]

Since a plurality of marks for distinguishing each designated position are stored in the corresponding overlay memories and read out in parallel, the marks can be displayed close to each other or overlapped with each other, and the object to be measured can be displayed. It is possible to precisely specify a measured point in a fine area and perform fine temperature measurement.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a block diagram showing an embodiment of an infrared temperature measuring device according to the present invention, and FIG. 2 is a schematic diagram of a display section showing a display state of a mark according to the present invention.

In these figures, 10 is an infrared camera which outputs an infrared image signal by horizontally scanning and vertically scanning an object to be measured (not shown).
After the infrared image signal from A is amplified by the amplifier 11,
The A / D converter 12 performs A / D conversion according to a predetermined temperature resolution. The A / D-converted infrared image signal is input to the linearization circuit 13, converted into temperature data via a voltage / temperature table written in a ROM (not shown), and stored in a memory unit 14 including a frame memory or the like. It

The digital infrared image signal of the memory section 14 is read at the timing of the synchronizing signal generating circuit 15 in response to the scanning of the monitor television 20, and the mark display storage means 16 and the temperature display storage means which are composed of an overlay memory or the like. The predetermined mark and character information read from 17 are superimposed and D / A converted by the D / A converter 18.

The analog infrared video signal from the D / A converter 18 is added to the video signal conversion unit 19 and sent to the monitor TV 20 as a composite video signal including a horizontal synchronizing signal and a vertical synchronizing signal, and a display unit 21. In the same way as a normal TV screen, infrared images, marks, and temperature values are displayed at the same time.

Reference numeral 22 denotes an infrared video signal based on the scanning timing signal from the infrared camera 10 for the memory unit 1.
Write address generator for writing to 4
Reference numeral 3 is a read address generator for reading the infrared video signal from the memory section 14 in accordance with the scanning timing of the monitor television 20.

[0020] 25 of the present embodiment from + ¹ to + ⁵ 5
A mark selection switch provided corresponding to a designated position display mark of a kind. By selecting an arbitrary mark by this switch 25, five marks provided corresponding to the five kinds of marks are provided. Overlay memory 1
6, an overlay writing selection signal 28 is output via the control unit 27 including a CPU and the overlay memory corresponding to the selected mark is selected.

Further, the selected mark is read from the mark and character ROM 26 via the control unit 27, and the mark data signal 29 of the mark and the selected overlay memory are provided at a predetermined position such as the center. A write address signal 30 for writing a mark is output to the overlay memory 16 via the control unit 27, and the mark is written in the selected overlay memory.

Reference numeral 24 is a position designating means, which comprises a joystick or the like provided on the front panel of the infrared temperature measuring device, for setting the marks at arbitrary plural positions in the infrared image, and specifies arbitrary positions on the image. By doing so, a new write address signal of the mark on the selected overlay memory is output via the control unit 27, and the mark data 31 is stored at the designated point of the overlay memory.

On the other hand, the position address on the image designated by the position designating means 24 is added to the memory unit 14, the temperature data at the relevant position is read out and temporarily stored in the register or the like of the control unit 27. The character (numeric) data corresponding to is read from the mark and character ROM 26 and stored in a predetermined position (the position indicated by reference numeral 7 in FIG. 2) of the temperature display overlay memory 17.

In this way, the mark data 31 stored in the mark display overlay memory 16 and the temperature numerical data stored in the temperature display overlay memory 17 are used in the process of scanning the television image signal by the synchronizing signal generating circuit 15. It is read in parallel according to the generated address, added to the infrared image signal read from the memory unit 14, input to the D / A converter 18, and D / A converted.

The D / A-converted analog signal is applied to the video signal conversion section 19 and is sent to the monitor TV 20 as a composite video signal including a horizontal sync signal and a vertical sync signal, and a normal TV screen is displayed on the display section 21. Similarly, the infrared image and the mark 31 indicating the position of the designated point and the temperature value 40 at the position can be simultaneously displayed in the image.

In the above description, the case where an image is displayed with a brightness difference corresponding to the intensity of the infrared image signal has been described. However, a pseudo-color image is obtained by coloring a plurality of gradations according to the intensity of the infrared image signal. The present invention can also be applied to the case of displaying.

[0027]

Since the infrared temperature measuring device according to the present invention has a structure in which the marks for distinguishing each designated point are stored in the corresponding mark display storage means and read out in parallel, each designated point is displayed. The marks can be displayed close to each other or superimposed on each other, and finer temperature measurement can be performed as compared with the conventional device of this type.

[0028]

[Brief description of drawings]

FIG. 1 is a circuit block diagram showing an embodiment of an infrared temperature measuring device according to the present invention.

FIG. 2 is an explanatory diagram of a display screen in the infrared temperature measuring device according to the present invention.

FIG. 3 is an explanatory diagram of a display screen in a conventional infrared temperature measuring device.

[Explanation of symbols]

 10 Infrared Camera 11 Amplifier 12 A / D Converter 13 Linearization Circuit 14 Memory Section 15 Sync Signal Generation Circuit 16 Mark Display Storage Means 17 Temperature Display Storage Means 18 D / A Converter 19 Video Signal Conversion Section 20 Monitor TV 21 Display unit 22 Write address generator 23 Read address generator 24 Position specifying unit 25 Mark selecting unit 26 Mark and character ROM 27 Control unit 31 Mark 40 Temperature numerical value

Claims (1)

[Claims] 1. An infrared temperature measuring device for writing a digital infrared image signal obtained by horizontally and vertically scanning an object to be measured into a memory and displaying the digital infrared image signal read from the memory as an image on a monitor television, Means for storing a plurality of marks different in display form in the image, mark selecting means for selecting the plurality of marks, and mark storing means associated with the plurality of marks and selected by the mark selecting means A plurality of mark display storing means for storing the marks read from the position, a position specifying means for positioning the selected marks at an arbitrary position in the image, and the digital infrared image signal at the specified position from the memory section And a digital infrared image signal from the extracting means is converted into a numerical value. And a temperature display storage unit that stores the numerical data from the conversion unit at a predetermined position corresponding to the plurality of marks, and displays the mark according to the scanning timing of the monitor television. Infrared temperature measuring device, characterized in that the mark information and the temperature information of the memory means for temperature display and the memory means for temperature display are read out and displayed simultaneously in the image.