JPH0416541Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention is applicable to devices that simultaneously monitor parts with very different illuminances, such as monitoring of laser processing work, or simultaneous monitoring of a welded part and its surrounding area in welding work. The present invention relates to an image monitoring device applied to, etc.

[Prior art] Conventional automatic welding monitoring devices monitor only the high-intensity arc light and the weld using a glass fiber or TV camera; At the same time, monitoring of the surrounding areas has not been carried out.

[Problems to be Solved by the Invention] For example, in welding work, the following problems occur when simultaneously monitoring a welded part and its surrounding areas, which have very different brightness.

(1) In order to monitor a welded area with extremely high brightness, it is necessary to reduce the illuminance by using a filter due to the performance of the TV camera, but as a result, it becomes impossible to monitor the surrounding area of the weld where the illuminance is low.

(2) When monitoring the welding zone and the welding surrounding area with individual TV cameras using dedicated filters, and composing the images, the monitor positions of the individual cameras are different, and the image may be distorted due to optical axis misalignment. When compositing, the images will be misaligned.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above problems and provide an image monitoring device that can simultaneously monitor areas with different illuminances on the same screen.

[Means for Solving the Problems] The image monitoring device according to the present invention includes an image two-way separation processing unit that separates an image into two images, a high-illuminance part and a low-illuminance part;
an image synthesis processing section that synthesizes the two images separated by the direction separation processing section into one image;
The present invention is characterized by comprising a composite image reproducing section that reproduces the image composited by the image composition processing section.

[Operation] According to the present invention, in order to eliminate image shift when images are combined, the two-way image separation processing section optically separates the image input from one lens into two directions using a prism lens. , the images are combined through an image compositing processing unit so that they become the same image, and one of the images separated by each TV camera is passed through a filter to reduce the brightness, so that the high brightness part is displayed on the TV. Can be monitored with a camera
Since a low brightness area can be monitored in the other image, images with very different brightness levels can be monitored at the same time.

[Example] Fig. 1 is a schematic diagram showing the configuration of an embodiment in which the present invention is applied to an image monitoring device for welding work, and Fig. 2 is a detailed configuration of the two-way image separation processing section in Fig. 1. 1 is a two-way image separation processing unit, 2 is an image composition processing unit, 3 is a composite image reproduction unit, for example, a monitor TV, and 4 is a focus adjustment and image size adjustment unit for clearly receiving the image. A zoom lens for adjustment; 5 is an optical prism lens that separates the image input through the zoom lens 4 into two directions; 6 is a monitor TV camera for monitoring the welding peripheral area; 7 is a monitor TV camera for monitoring the welding area. ,
8 is an ND filter that lowers the image brightness so that the welding part can be monitored; 9 is a reflection mirror for changing the image direction so that the monitor camera receives the image passed through the ND filter 8; A is the welding part to be monitored. For example, B shows an example of an image received by the monitor TV camera 6, and C shows an example of an image received by the monitor TV camera 7.

In addition, the image two-way separation processing unit 1 in FIG.
is configured.

The operation of the embodiment of the present invention described above will be explained.

First, the part A to be welded is imaged by a zoom lens 4 as shown in FIG. 2, and the image is separated into two directions by a prism lens 5. One of the separated images is directly received by the monitor TV camera 6,
Look at the welding peripheral area B where the illuminance is low. In addition, in order to see the welding part C with high brightness, the other image is passed through an ND filter 8, and the direction of the image is changed by a reflecting mirror 9 so that it is in the same direction as the image of the welding peripheral part B. and the image is received by another monitor TV camera 7. In this case, the ND filter 8 can be changed arbitrarily to obtain the optimum image condition according to the brightness of the welded part. Images B and C received by monitor TV cameras 6 and 7, respectively, are combined by an image combination processing section 2. As a result, the weld and surrounding area can be monitored.
You can monitor them simultaneously on the TV3 screen, and
Since the same images are used for compositing, the resulting composite screen has no deviation.

[Effects of the invention] According to the invention, the following excellent effects can be achieved.

(1) Areas with very different brightness, such as the welding area and the area around the welding area, can be monitored simultaneously on the same screen.

(2) Image monitoring of large structures with different brightness that is difficult for workers to directly monitor. For example, it can be used to monitor welds when automatically welding large structures, and it can also be used to monitor welding positions, melting conditions, and weld bead formation. High-quality welding is possible because the status can be checked at the same time.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a welding monitoring device as an embodiment of the present invention, and FIG. 2 is a detailed diagram of a two-way image separation processing section in FIG. 1. 1... Two-way image separation processing unit, 2... Image composition processing unit, 3... Monitor TV.

Claims (1)

[Scope of utility model registration request] Divide the image into two areas: high illumination and low illumination.
An image two-way separation processing unit that performs separation processing into images; an image synthesis processing unit that synthesizes the two images separated by the two-way image separation processing unit into one image; An image monitoring device comprising: a composite image reproducing unit that reproduces a composite image.