JPH04291127A - Method for displaying abnormality discriminating area for image processor type state monitoring device - Google Patents

Abstract

PURPOSE:To easily input an appropriate abnormality discriminating value in accordance with a monitored image so as to improve the operability of the title device by displaying the abnormality discriminating value on the same screen together with the monitored image as an area. CONSTITUTION:When an abnormality discriminating value is inputted from a processing condition input section 6 in the unit of cm<2>, the value is sent to a picture processor 4 by means of a signal 12. A telephoto degree signal 9 obtained from a TV camera 1 with zoom lens and distance signal 10 obtained from a distance sensor 7 are transmitted to the processor 4 through a TV camera control section 2 and the extent of the visual field of a monitored picture is calculated from the telephoto degree and distance. Then the abnormality discriminating area (cm<2>) is displayed on a screen by finding the area value of one picture element by converting the extent of the visual field into the number of picture elements and calculating the number of picture elements of the abnormality discriminating area (cm<2>). Therefore, the abnormality discriminating area can be compared with the picture at a glance and an abnormality discriminating area suitable for the screen can be easily inputted.

Description

[Detailed description of the invention]

0001

[Industrial Field of Application] The present invention is an image processing type condition monitoring device (hereinafter referred to as a monitoring device) that uses an image input unit to detect the occurrence of an abnormality on a monitoring screen. Regarding how to facilitate.

0002

[Prior Art] A conventional monitoring device is disclosed in Japanese Patent Application Laid-open No. 61-15
As described in Japanese Patent No. 482, the image of the camera is stored in the still image storage memory 1, the image after a certain time is stored in the still image storage memory 2, and the memories 1 and 2 are compared,
Take a difference image. If the difference image area is equal to or greater than the abnormality determination value, it is determined that there is an abnormality. However, there is no report on how to set the abnormality judgment value.

0003

[Problem to be Solved by the Invention] The above conventional technology does not take into consideration the ease of setting the abnormality judgment value, and requires the operator to specify how large the area of the abnormality judgment value is on the screen. There was no way to make him understand. Therefore, when entering an abnormality judgment value, the abnormality judgment value is displayed as an area on the same screen where the monitoring target is displayed, so the operator can see at a glance whether the input abnormality judgment value is appropriate for that monitoring screen. can be confirmed.

[0004] An object of the present invention is to provide a method of displaying an abnormality determination area to facilitate setting of an abnormality determination value.

[0005]

[Means for Solving the Problems] In order to achieve the above object, the present invention performs calculations using an image processing device that processes the screen when an operator sets an abnormality judgment value, and uses the abnormality judgment value as an area. This incorporates a means for displaying on the same screen as the monitored screen.

[0006]

[Operation] At the same time as the operator sets the abnormality judgment value, the abnormality judgment value is displayed as an area on the same screen as the monitored screen. This allows the operator to see at a glance whether the input abnormality determination value is appropriate on the monitoring screen, so that an appropriate abnormality determination value can be set according to the screen, and incorrect abnormality determination values are no longer set.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a system block diagram incorporating the present technology. This system includes a television camera 1 with a zoom lens, a television camera control section 2, an image processing device 4, an operation section 3, a monitor television 5, a processing condition input section 6, and a distance sensor 7. The image signal 8 taken in from the television camera 1 is sent to the image processing device 4 to determine the presence or absence of an abnormality by comparing the size of the difference area value (number of pixels) with the previously taken image and the abnormality judgment value (number of pixels). It is something to do. Telephoto signal 9 obtained from TV camera 1 with zoom lens
The distance signal 10 obtained from the distance sensor 7 is transmitted to the image processing device 4 via the television camera control section 2, and the viewing range of the monitoring screen can be calculated based on the telephoto degree and distance.

FIG. 2 shows the flow of this method. The abnormality judgment value can be entered by creating a rectangle on the screen with the mouse and inputting it, or by using the keyboard (
It can be input in units of m2) (cm2) (mm2) or the number of pixels (dots). For example, the processing condition input section 6
If you input the abnormality judgment value in (cm2), the signal will be 12.
The image is sent to the image processing device 4 by. The image processing device 4 receives a telephoto signal 9 sent via the television camera control section 2.
From the distance signal 10 between the monitor and the object to be monitored, the field of view of the screen represented on the motor television is calculated. The area value of one pixel is determined by converting the viewing range and the number of pixels, and the number of pixels on this screen for which the abnormality determination area (cm2) is calculated is calculated and displayed as an area on the screen as shown in 14 in Figure 3. be done. The operator can clearly see the comparison between this screen and the abnormality determination area, and can easily input the abnormality determination area suitable for this screen.

15 in FIG. 4 shows a screen when inputting an abnormality determination value. On this screen, a small abnormality determination value is input assuming water droplet leakage as shown in 19 in FIG. Here, the operator inputs the abnormality determination value (Amm2), and at the same time, the image processing device calculates and displays the area as shown in 16. After that, the operator changed the settings on the screen as shown in 18 of FIG. In that case, the previously input abnormality judgment value (
The size of Amm2) on the screen is also enlarged and corrected in proportion to the zoom-up of the monitoring target, and is displayed as 18.

[0010] The size of the water droplet that appears on the screen changes relative to the telephoto degree and distance of the screen, as shown in Figure 5, but the actual size of the water droplet is approximately a fixed size, and in any case The size when supplemented in two dimensions is (several mm2)
That's about it.

[0011] When this method is introduced into a condition monitoring device, the abnormality judgment value (Amm2) of water droplet leakage detection,
If you set and input the abnormality judgment value (Bcm2) for steam leak detection, etc., any monitoring target will be calculated based on the telephoto degree and the distance to the monitoring object, and the abnormality judgment value will be automatically converted to the number of pixels. and displayed on the TV monitor screen.

0012

According to the present invention, when setting an abnormality judgment value, it is possible to grasp the magnitude of the abnormality judgment value at a glance and compare it with the monitoring image, so that abnormality judgment can be made according to the monitoring image. Since values can be input easily and appropriate abnormality determination values can be input, the operability of the monitoring device can be improved.

[Brief explanation of the drawing]

FIG. 1 is a system block diagram of a monitoring device.

FIG. 2 is a flowchart of an abnormality determination area display method.

FIG. 3 is an explanatory diagram of a screen when setting an abnormality determination area.

FIG. 4 is an explanatory diagram of a screen when setting an abnormality determination area.

FIG. 5 is an explanatory diagram of the screen when water droplets leak.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1... Television camera, 2... Television camera control part, 3... Operation part, 4... Image processing device, 5... Monitor television, 6... Processing condition input part, 7... Distance sensor.

Claims (2)

[Claims] Claim 1: In a condition monitoring device that includes a television camera that captures the condition of equipment as an image, and an image processing device that processes the image of the television camera, when an abnormality determination value is input, the area of the abnormality determination value is displayed on a screen. 1. A method for displaying an abnormality determination area for an image processing type condition monitoring device, characterized by displaying an abnormality determination area on an image processing type condition monitoring device. [Claim 2] A television camera with a zoom lens capable of capturing the state of the equipment as an image and enlarging or reducing the image that appears within its field of view, a distance sensor that measures the distance to the monitoring target, and an image processing device are installed. 1. An abnormality determination area display method for an image processing type condition monitoring device, comprising correcting an abnormality determination area displayed on a screen according to a telephoto degree and a distance to a monitoring target in the condition monitoring device.