JPS62110110A - Range finder for infrared image - Google Patents

Abstract

PURPOSE:To measure and display the distance of a target object and display the infrared image of the target object by providing two infrared imaging device. CONSTITUTION:The infrared rays from a target object 1 caught by cameras 2-1 and 2-2 are displayed as images on displays 5-1 and 5-2 via video signal converting means 3-1 and 3-2 and image processors 4-1 and 4-2, respectively. A cursor is set to the object 1 to be measured and displayed on the displays 5-1 and 5-2 by operating cursur units 8-1 and 8-2 and the position signals of the object 1 on screens are detected to be outputted to a target extracting circuits 6-1 and 6-2, respectively. The circuits 6-1 and 6-2 extract the video signals of the object 1 from those outputted from the means 3-1 and 3-2 by means of the position signals of the object 1 from the cursor units 8-1 and 8-2, respectively, and output the extracted video signals to a range finder 7. The range finder 7 detects the time difference on the screens between both the video signals extracted by the circuits 6-1 and 6-2 and computes the distance of the target object 1 from the time difference by a prescribed expression. A computation value is coded and passed through processors 4-1 and 4-2, whereby the distance is displayed on the displays 5-1 and 5-2, respectively.

Description

[Detailed Description of the Invention] [Summary] An infrared imaging distance measuring device, in which two infrared cameras having the same viewing angle are arranged in a horizontal row with a predetermined interval, and a target object is simultaneously captured by each camera. The system is configured to measure the distance to the target object by detecting the display position of the video signal and calculating the distance to the target from the detection time. It is possible to measure the distance to

[Industrial application field]

The present invention relates to an infrared video distance measuring device that displays an infrared image of a target object and also measures and displays the distance to the target object.

As is already well known, infrared imaging devices are used to display the temperature pattern of a target object in the dark.

In recent years, for certain purposes, it has become necessary to use an infrared imaging device not only to display a target object but also to know the distance to the target object, and there has been a demand for an infrared imaging distance measuring device for this purpose.

[Conventional technology]

Figure 4 is a block diagram of the infrared imaging device, which includes an infrared camera (hereinafter referred to as camera) 2 that captures infrared rays emitted from a target object 1, and an infrared detector that converts the infrared rays captured by camera 2 into a video signal. device 31 and video amplifier 3
2, a video processor 4 that performs image processing on the output video signal of the video converter, and a display 5 that is a TV monitor that displays the image signal processed by the video processor 4. ing.

Infrared rays emitted from the target object are captured by the camera 1 and converted into electrical signals by the infrared detector 31.

The output electrical signal of the infrared detector 31 is amplified to a predetermined value by a video amplifier 32 to become a video signal, and the temperature pattern of the target object is displayed on a display 5 via an image processor 4.

[Problem that the invention seeks to solve]

Although the above infrared imaging device can display the temperature pattern of a target object, it does not have the function of measuring the distance to the target object, and cannot measure the distance to the target object in the dark for certain purposes. There was such a problem.

The present invention was created in view of the above points, and an object of the present invention is to provide an infrared imaging 1filJ distance device that can display an infrared image of a target object, which is a function of an infrared imaging device, and measure the distance to the target. It is said that

[Means for solving problems]

FIG. 1 is a schematic block diagram of an infrared image ranging device of the present invention, in which a first camera (
(for video) 2-1, a second camera (for measurement) 2-2,
The first camera converts the infrared rays captured by these two cameras 2-1 and 2-2 into electrical signals. a second video signal converting means 3-1.3-2; The first video signal converter 3-1 performs image processing on each output video signal of the second video signal converter 3-1 and 3-2. The second image processing unit 4-1.4-2 and the first image processing unit 4-1.
．． Two infrared imaging devices are used, each consisting of a first and a second display 5-L 5-2 that display respective image signals of the second image processing section 4-1 and 4-2.

In order to measure the distance to the target object, a first camera 2
-1 and the second camera 2-2 have the same viewing angle,
They are arranged in horizontal rows at predetermined intervals.

In addition, first and second indicators 5- are used as target extracting means.
1. Detecting the target objects displayed in 1 and 5-2.
The second cursor 8-1, 8-2, and the first cursor 8-1.8-2. The first to extract the target object detected by the second cursor 8-1.8-2.
and second target extraction circuits 6-1 and 6-2;
and a distance calculation unit 7 that calculates the distance to the target object by detecting the time of the re-extracted signal extracted by the second target extraction circuit 6-1 and 6-2; A camera control section 9 for operating the two cameras 2-2 at the same timing is attached to the two infrared imaging devices.

[Effect]

The infrared rays of the target object captured by the first camera and the second camera 2-1.2-2 are transmitted to the first and second video signal converting means 3=1.3-2 and the first and second image processing Part 4
-1.4-2 respectively through the first display and the second display.
The image is displayed on the display (5-1, 5-2).

The first and second cursor portions 8-1, 8-2 point to the target object to be measured displayed on the displays 5-1 and 5-2.
The cursor is set by operating , the position signal of the target object on the screen is detected, and the first and second target extraction circuits (6-1
, 6-2).

The first and second target extraction circuits 6-1 and 6-2 convert the first and second video conversion means by the position signals of the target object from the first and second cursor sections 8-1 and 8-2. The video signal of the target object is extracted from the video signal output from 3-1.3-2 and output to the distance measuring section 7.

The distance measurement unit 7 detects the time difference on the screen between the two extracted video signals, calculates the distance to the target object from the time difference according to a calculation formula, encodes the calculated value, and converts it into the first and second images. The distance is displayed on the first and second displays 5-1.5-2 via the processing section 4-1.4-2.

In the present invention, the distance to the target object is calculated by calculating the distance to the target object from the display time of the target object displayed on two infrared imaging devices, and the distance to the target object is measured and the infrared image of the target object is displayed. It becomes possible to perform display.

〔Example〕

FIG. 1 is a block diagram of an infrared image distance measuring device according to an embodiment of the present invention, and FIGS. 2 and 3 are explanatory diagrams of distance measuring operations.

In FIG. 1, an infrared distance measuring device according to an embodiment is a camera (
2-1, 2-2) and video signal conversion means (3-1, 3
-2), image processing unit (4-1, 4-2) and display unit (5
-1, 5-2) are used.

The first camera 2-1 and the second camera 2-2 have the same viewing angle and are arranged in a row with a predetermined interval, and the first and second displays 5-1 and 5- The first and second cursors 8-L detect the target object displayed in 2.
8-2 and 1st. First and second target extraction circuits 6-1 and 6-2 that extract the target object detected by the second cursor 8-1.8-2, and first and second target extraction circuits 6-1. and a distance calculation unit 7 that calculates the distance to the target object from both extraction signals extracted in step 6-2, and camera control that operates the first camera 2-1 and the second camera 2-2 at the same timing. 9 is attached to two infrared imaging devices.

In FIG. 1, under the control of the camera control unit 9, the first and second cameras are set to a target <4 within the same viewing angle.
The infrared rays emitted from the M-tree 1-1 and the car 1-2) are captured.

The captured infrared rays are transmitted to first and second video signal converting means 3-1, 3-2 and first and second image processing units 4-
1.4-2, the image signal is transmitted to the first camera 2-
The image captured by the second camera 2-2 is displayed on the first display 5-1 as shown in FIG. 2A, and the image captured by the second camera 2-2 is displayed on the second display 5-2 as shown in FIG. 2B. .

Next, as shown in FIG. 3, by operating the first and second cursor parts 8-L 8-2, the vehicle l-- which is the object to be measured from the images displayed on the first and second displays. Cursor 8- to 2
3 and detects the position signal of the vehicle 1-2 and outputs it to the first and second target extraction circuits 6-1 and 6-2, respectively.

The first and second target extraction circuits 6-1.6-2 extract from the video signal of the target object inputted from the video signal conversion means 3-1.3-2 as shown in FIGS. 2C and 2D. A video signal of the distance measuring object (car) 1-2 is extracted and output to the distance calculation section 7.

The distance calculation unit 7 detects the scanning time Ll+j2 up to the car l-2 on each screen of FIG. Measure the distance according to the following.

L=kXff ・ ・ ・ ・ ・ ・ ・ ・
+1+ However, L represents the distance to the target object and the distance between the cameras.

Moreover, K is calculated|required by the following formula.

K = (CostI/ T Xθ, XCo5(1-
t2/T×θ2))/Sin(J/
Txθ! +(1t2/T)Xθ2) (2) where θ1 and θ2 indicate viewing angles from the left and right viewing lines of the first and second cameras.

From K obtained from equation (2), the measured pressure MttL is equal to the time tl.

It becomes a function of t2 and can be calculated.

The distance calculation unit 7 calculates the distance measuring object (car) 1-2 according to equation (2).
4-L calculates the distance to
The distance is displayed on the display 5-1 and 5-2.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to display an infrared image of a target object and to know the distance to the target object.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an infrared imaging distance measuring device according to an embodiment of the present invention, FIGS. 2 and 3 are explanatory diagrams of distance measuring operations, and FIG. 4 is a block diagram of the infrared imaging device. In the figure, 1 is a target object, 1-1 is a tree, ■-2 is a ranging object (car), 2 is an infrared camera, 2-1 is a first camera, 2-2 is a second camera, and 3 is a video signal conversion means;
3-1 is a first video signal conversion means, 3-2 is a second video signal conversion means, 31 is an infrared detector, 32 is a video amplifier, 4 is an image processing unit, and 4-1 is a first image processing unit. Department,
4-2 is a second image processing unit, 5 is a display device, and 5-1 is a first image processing unit.
, 5-2 is a second display, 6-1 is a first target extraction circuit, 6-2 is a second target extraction circuit, 7 is a distance calculation unit, and 8-1 is a first cursor. Part, 8-2IPJ 2 g
t/) 7 mouth = 7rMts 1 Figure wo separate S1 1p7 phi 乍/lJ beginning fs 2 cause car external line g intersection imimim X/) 7・'low/7 figure 4

Claims (1)

[Claims] Infrared cameras (2-1, 2-2) having the same viewing angle are arranged in a row at a predetermined interval, and two infrared imaging devices each display an infrared image within the field of view of each of the infrared cameras. and each of the infrared cameras (2-1, 2
-2) first and second target extracting means (6-1, 6-2 and 8-1, 8-2) for extracting the video signal of the target object (1-2) captured in step 2); An infrared imaging distance measuring device comprising: a distance measuring section (7) that measures the distance to the target object based on the scanning time of the target object (1-2) extracted by the means.