JPH04699A - Abnormality monitoring device - Google Patents

Abstract

PURPOSE:To judge an abnormality occurrence spot and the contents of abnormality by providing an infrared camera, a visible ray camera, the recording means of a picture, a picture display means, an abnormality detecting means and an abnormal spot display means. CONSTITUTION:A monitored object is monitored by an infrared camera and a visible ray camera, the pictures of them are recorded 7 and are displayed 8 and when abnormality is detected 9, an abnormality generating spot is displayed in the picture display means 8 automatically. Besides, since the picture from the infrared camera 2 is used for detecting the abnormality, also temperature abnormality 12 in a device, pipe arrangement and so on can be detected in addition to the abnormality of the intrusion of an actual object to emit infrared rays and so on. Thus, the leakage 12 of fluid of low or high temperature gas from the respective kind devices, the pipe arrangement and so on within a monitored object zone, the temperature abnormality, the intrusion of a questionable person and so on into the zones and so on can be monitored surely.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention is applicable to leakage of fluids such as low-temperature or high-temperature gases from various devices and pipes in monitored areas in facilities such as factories, abnormal temperatures, and the like. This invention relates to an abnormality monitoring device for monitoring the intrusion of suspicious persons, animals, etc. into an area.

(Prior Art) As a monitoring device in a facility such as a factory, there is a device that uses an industrial television (ITV). For example, as shown in FIG. 2, this device displays an image C of the object to be monitored from a visible light camera a on a display means d such as a CRT, and a supervisor looks at the image C to monitor for abnormalities. The image C is V
The information is recorded in a recording means e such as a TR, and when an abnormality occurs, the image C at that time is reproduced to determine the location where the abnormality has occurred and the details of the abnormality.

(Problem to be Solved by the Invention) With such a monitoring device, the burden on the monitor is heavy because the person must constantly watch the image C on the display means d in order to monitor abnormalities, and in practice continuous monitoring is not possible. is nearly impossible. In addition, when determining the location of the abnormality and the details of the abnormality,
The image C of the recording means e must be reproduced each time, which is troublesome.

The present invention aims to solve such conventional problems.

(Means for Solving the Problems) In order to solve the above problems, the abnormality monitoring device of the present invention includes an infrared camera and a visible light camera directed toward a monitoring target,
an abnormality detection means for detecting the occurrence of an abnormality and its location from temporal changes in the images from the cameras;
The apparatus is further provided with abnormality display means for superimposing and displaying a display corresponding to the abnormality occurrence position detected by the abnormality detection means on the image displayed on the image display means.

In the above configuration, the abnormality detection means may be configured to calculate a temporal difference for each pixel of an image corresponding to the field of view of the camera to detect a temporal change in the image. The abnormality detection means detects an unidentified object from temporal changes in temperature distribution in an image taken by an infrared camera, and also detects the shape of an object corresponding to the unidentified object in an image taken by a visible light camera. If the visible light camera is a color camera, the above-mentioned determination of the corresponding object in the image of the visible light camera can be performed by determining the shape and color of the corresponding object. This can be done by using

Further, the recording means can be configured to be able to display an image at the time of occurrence of an abnormality on the image display means in a static state based on the abnormality detection signal from the abnormality detection means, and the image to be displayed on the image display means in this static state. is preferably a visible image taken by a visible light camera. Further, the abnormality storage means may be configured to convert the abnormality location detected by the abnormality detection means into a symbol and display the symbol in a superimposed manner on the image display means.

The above-mentioned monitoring device can be provided with an alarm means activated by an abnormality detection signal from the abnormality detection means.

(Operation) An infrared camera captures the temperature distribution of a target object using infrared rays emitted from the target object. Therefore, the abnormality detection means can first detect an unidentified object from the temporal change in temperature distribution in the image of the monitored object from the infrared camera.

Then, this unidentified object is compared with the shape and/or color of the corresponding object in the visible light camera image to see if it is a previously confirmed object, and if it is not a confirmed object, it is determined as an abnormal object. In other words, abnormalities can be detected. Note that the object here includes not only a real object but also a virtual object associated with a rise or fall in temperature.

When an abnormality, that is, an abnormal object is detected in this manner, the abnormality detecting means issues an abnormality detection signal to the recording means and the abnormal location display means, and outputs the location where the abnormality has occurred to the abnormal location display means. In response to this abnormality detection signal, the image recording means displays the image of the monitoring target at that time in a static state on the image display means, and the abnormal location display means displays a display corresponding to the abnormal location on the image display means. It is displayed superimposed on the above image, that is, the entire image of the monitoring target.

Therefore, the supervisor can easily recognize the occurrence of an abnormality and its location by viewing the image of the monitoring target at the time of the abnormality displayed on the display means and the corresponding display of the abnormality occurrence point superimposed on the image. can do. In this case, it is preferable for the image of the monitoring target to be displayed on the image display means to be an image from a visible light camera because the resolution is higher, but in some cases, an image from an infrared camera may be displayed as necessary. You can also do that.

The supervisor can know the occurrence of an abnormality in the monitored object by the display on the image display means as described above, but it is necessary to provide an alarm means activated by the abnormality detection signal of the abnormality detection means. For example, the supervisor no longer needs to constantly monitor the image display means.

(Example) Next, an embodiment of the present invention will be described with reference to FIG.

In FIG. 1, reference numeral l represents a monitoring target, and an infrared camera 2 and a visible light camera 3 are provided facing the monitoring target l. Reference numeral 4 virtually represents the field of view of these cameras, and this field of view 4 becomes the range 4 to be monitored. In the figure, the monitoring target range 4 is a relatively narrow area near the piping 6 connected by the flange 5, but the monitoring target range 4 may be a wide area of a facility such as a factory, etc., as appropriate. It is. Also, these cameras 2.
3 can be configured so that the monitoring target range 4 can be adjusted as appropriate using a scanning mechanism, a zoom mechanism, or the like.

Images from the infrared camera 2 and visible light camera 3 are recorded by an image recording means 7 using a VTR or the like, and these images are displayed on an image display means 8 such as a CRT monitor. On the other hand, the images from the infrared camera 2 and the visible light camera 3 are also input to an abnormality detection means 9, and this abnormality detection means 9 temporally analyzes images corresponding to the field of view 4 of the camera pixel by pixel. The configuration is such that the occurrence of an abnormality and its occurrence location are detected by performing differential calculations and detecting temporal changes in images. The abnormality detection signal from this abnormality detection means 9 is
The image recording means 7 and the abnormal place display means 10 are inputted to control them, and the abnormality detection means 9 is configured to input the data of the detected abnormality place to the abnormal place display means IO. There is. The abnormal location displaying means 10 is configured to display a corresponding display of the abnormality occurrence location superimposed on the image displayed on the image displaying means 8. This correspondence display 11 can be a display of the area in the image detected as abnormal by the abnormality detection means 9 as it is, or can be a display in which this area is appropriately symbolized.

In the above configuration, an image taken by the infrared camera 2 that captures the infrared radiation distribution within the field of view 4, that is, the temperature distribution,
The visible image taken by the visible light camera 3 is input to the image recording means 7 and recorded over time, and simultaneously displayed on the image display means 8, and is also input to the abnormality detection means 9. Differences are calculated for each pixel between an image that is updated at appropriate intervals and an image immediately before the update. Note that the image displayed on the image recording means 7 may be a visible image, or may be switched to an image taken by the infrared camera 2 or displayed in a superimposed manner, if necessary.

However, if low-temperature or high-temperature gas leaks from various devices or piping within the field of view 4 of the camera, or if objects that emit infrared rays such as humans, animals, or automobiles enter the field of view 4, the infrared camera 2 When the temperature distribution of the image changes, the abnormality detection means 9 calculates the change in the temperature distribution for each pixel as described above, derives a region corresponding to a predetermined amount of change or more, and detects this region as the unidentified object 12. . Next, the abnormality detection means 9 determines whether or not the object is a previously confirmed object based on the shape and/or color of the corresponding object corresponding to the unidentified object 12 using the image of the visible light camera 3. If the object is not a confirmed object, it is determined as an abnormal object and an abnormality is detected. Because such a determination is made, changes in images during normal operations are not determined to be abnormal, and the reliability of abnormality detection is high. In order to use
Abnormalities that can be detected include intrusion of a real object that emits infrared rays, as well as temperature abnormalities in equipment, piping, etc.

When the above is detected as described above, the abnormality detection means 9 issues an abnormality detection signal to the recording means and the abnormal location display means IO, and also outputs the occurrence location to the abnormal location display means 10. In response to this abnormality detection signal, the image recording means 7 displays an image of the monitoring target 1 at that time, preferably a visible image, on the image display means 8 in a still state, and the abnormality display means 10 displays the abnormality location A corresponding display is displayed superimposed on the image on the image display means 8, that is, the entire image of the monitoring object l. It is preferable that the image recording means 7 is capable of displaying the image at the above-mentioned point in a still state and at the same time continuing to record the image.

As described above, the supervisor can detect the occurrence of an abnormality and The location can be easily recognized. In the above case, the image of the monitoring target l displayed on the image display means 8 is better to be an image from the visible light camera 3.
This is preferable because the resolution is higher, but depending on the situation, the image from the infrared camera 2 can also be displayed as necessary.

The supervisor can know the occurrence of an abnormality in the monitored object 1 by the display on the image display means 8 as described above. If this is provided, the monitor does not need to constantly monitor the image display means 8.

(Effects of the Invention) As described above, the present invention monitors a monitoring target using an infrared camera and a visible light camera, records images from these cameras, and
At the same time, if an abnormality is detected from these images, the location where the abnormality has occurred is automatically displayed on the image display means together with the entire image at the time of the abnormality occurrence, so that the above occurrence and its occurrence This has the effect that the location can be detected easily and reliably. Furthermore, since the present invention uses images from an infrared camera to detect abnormalities, it is possible to detect not only abnormalities such as the intrusion of a real object that emits infrared rays, but also temperature abnormalities in equipment, piping, and the like.

Thus, the present invention can be used to prevent leakage of fluids such as low-temperature or high-temperature gases from various devices and pipes in monitored areas of facilities such as factories, abnormal temperatures, and intrusion of suspicious persons, animals, etc. into the areas. This has the effect of making it possible to monitor easily and reliably.

[Brief explanation of the drawing]

FIG. 1 is a system explanatory diagram showing the overall configuration of an embodiment of the present invention, and FIG. 2 is a system explanatory diagram showing the overall configuration of a conventional example. Code 1...Monitoring target, 2...Infrared camera, 3...
・Visible light camera, 4...Field of view (monitoring range), 5
・Flange, 6... Piping, 7 Image recording means, 8...
・Image display means, 9: Abnormality detection means, IO: Abnormal location display means, 11: Corresponding display, 12: Unidentified object.

Claims (8)

[Claims] (1) In addition to providing an infrared camera and a visible light camera aimed at the monitoring target, a means for recording images from these cameras, and an image display means, the occurrence of an abnormality and its location can be detected from temporal changes in the images from the cameras. and an abnormality display means for displaying a display corresponding to the abnormality location detected by the abnormality detection means superimposed on the image displayed on the image display means. Characteristic abnormality monitoring device (2) The abnormality detection means according to claim 1 is an abnormality monitoring device characterized in that the abnormality detection means detects a temporal change in the image by temporally calculating a difference for each pixel of the image corresponding to the field of view of the camera. (3) The abnormality detection means according to claim 1 detects an unidentified object from a temporal change in temperature distribution in an image taken by an infrared camera, and also detects the shape of the object corresponding to the unidentified object in an image taken by a visible light camera. An abnormality monitoring device characterized by determining an abnormal object from (4) The visible light camera according to claim 1 is a color camera, and the abnormality detection means detects an unidentified object from temporal changes in temperature distribution in the image of the infrared camera, and detects an unidentified object from the temporal change in temperature distribution in the image of the infrared camera. An abnormality monitoring device characterized by determining an abnormal object based on the shape and color of an object corresponding to the unidentified object. (5) The abnormality monitoring device according to claim 1, wherein the recording means is configured to be able to display an image at the time of occurrence of the abnormality on the image display means in a stationary state based on the abnormality detection signal from the abnormality detection means. (6) An abnormality monitoring device according to claim 5, wherein the image displayed on the image display means in a stationary state is a visible image obtained by a visible light camera. (7) An abnormality monitoring device according to claim 1, wherein the abnormality location display means is configured to convert the abnormality occurrence location detected by the abnormality detection means into a symbol and display it in a superimposed manner on the image display means. (8) An abnormality monitoring device characterized in that the monitoring device according to claim 1 is provided with an alarm means activated by an abnormality detection signal of the abnormality detection means.