JPH10311684A - Abnormality detection system for apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To indicate the range of combustion flame in a rotary kiln quantitatively and stably by indicating the range of combustion flame, in the axial direction of a rotary kiln based on the results of an image processor and indicating the border line of normal range of the combustion flame based on numerical values from an input unit. SOLUTION: The image of a combustion flame 2 in a rotary kiln 1 is picked up by means of a monitor camera 3 and a video output is inputted to an image processor 5 in order to detect a combustion flame range (a range in the axial direction of the rotary kiln) based on the difference in the brightness distribution of the image. A simulated cross-section and the distance in the depth direction of the rotary kiln 1 are presented on a display 6 along with the combustion flame range and the line indicating the limit position of a normal combustion flame range inputted from an input unit 61. The image processor 5 operates the position of a detected combustion flame range in the longitudinal direction of the rotary kiln 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device abnormality detection system for a process plant, and more particularly to a system for detecting a combustion flame range in a rotary kiln using an image processing device and displaying the result to an observer in an easily understandable manner. Regarding improvement.

[0002]

2. Description of the Related Art Conventionally, when monitoring the combustion flame in a rotary kiln, an observer observes an image of a surveillance camera in the rotary kiln on a monitor. It was controlled by changing parameters.

FIG. 3 shows an example of such a conventional monitoring system. In the figure, 1 is a rotary kiln, 2 is a combustion flame in the kiln, 3 is a surveillance camera arranged in the rotary kiln and capable of photographing the inside of the kiln, and 4 is a monitor for displaying an image taken by the surveillance camera 3. . FIG. 4 shows an example of an image on the monitor 4. The image is viewed from the axial direction of the kiln 1, and 21 is an image of the combustion flame 2.

[0004]

However, the identification of the combustion flame range in such a device abnormality detection system is based on the experience of a supervisor, and cannot be quantitatively grasped as described below. Not only that, it was difficult to display a stable combustion flame range.

FIG. 4 is a view of the inside of the rotary kiln 1 viewed from its axial direction. A large circle 22 indicates an open end in front of the rotary kiln 1 and a small circle 23 indicates an open end in the rear. The combustion flame 21 (corresponding to 2 in FIG. 3) is generated along the inner wall of the rotary kiln 1, and the surveillance camera 3 captures the combustion flame in the depth direction as shown in FIG. Can be.

In the image of the combustion flame 21 shown in FIG. 4, broken lines 24 and 25 on both sides are virtual ranges (ranges in the depth direction) that the observer has empirically determined to be normal. However, the range varies depending on the individual differences of the observers and the viewing time, and the variation is large, so that there is a disadvantage that a quantitative and stable grasp cannot be obtained.

SUMMARY OF THE INVENTION In view of the foregoing, it is an object of the present invention to detect and display a combustion flame range in a rotary kiln by image processing, thereby making it possible to quantitatively and stably display a combustion flame range. It is to provide a detection system.

[0008]

According to the present invention, there is provided a surveillance camera for photographing a combustion flame in a rotary kiln, and an image for detecting a combustion flame range from an image of the surveillance camera. A processing device, an input device for inputting a numerical value indicating a normal range of the combustion flame, a combustion flame range in the axial direction of the rotary kiln based on the result of the image processing device, and a combustion flame based on the numerical value from the input device. A display device for displaying a boundary line of the normal range.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings. FIG. 1 is a configuration diagram showing one embodiment of a device abnormality detection system according to the present invention. The same parts as those in FIG. 3 are denoted by the same reference numerals, and the description of those parts will be omitted. In FIG. 1, reference numeral 5 denotes an image processing device that receives a video output of the monitoring camera 3 and performs processing for detecting a combustion flame range, 6 denotes a display device that displays a result obtained by the image processing device 5, and 61
Is an input device for inputting necessary data to the display device 6.

The operation in such a configuration will be described below. The surveillance camera 3 captures an image of the combustion flame 2 burning inside the rotary kiln 1. The video output of the monitoring camera 3 is input to the image processing device 5. In the image processing device 5, the combustion flame range (the range in the axial direction of the rotary kiln 1) is based on the difference in the luminance distribution of the image, and more specifically, on the principle that the luminance of the combustion flame portion is higher than the background. Is detected.

As shown in FIG. 2, the display device 6 displays a cross-sectional view 7 simulating a cross section of the rotary kiln 1 and a distance 8 in the depth direction, and further indicates a combustion flame range 9 and a limit position of a normal range of the combustion flame. Lines (boundary lines) 10 and 11 are displayed.

The image processing device 5 further obtains the position of the combustion flame range detected above in the longitudinal direction of the rotary kiln 1 by calculation. When displayed on the basis of the obtained position, a combustion flame range 9 shown in FIG. 2 is obtained. The input device 5
From 1, data (numerical values) indicating the normal range of the combustion flame is input to the display device 6, and is displayed on the sectional view of the rotary kiln 1 as boundary lines 10 and 11 indicating the normal range of the combustion flame.

With the display shown in FIG. 2, the observer can recognize the range of the combustion flame in the rotary kiln 1 at a glance. Further, since the boundary line indicating the normal range is drawn, it can be immediately determined whether or not the combustion range is normal.

It is to be noted that the above description of the present invention has been presented by way of illustration and example only of particular preferred embodiments. Thus, it will be apparent to one skilled in the art that the present invention may be modified or modified in many ways without departing from its essentials.

[0015]

As described above, according to the present invention, the range of the combustion flame is detected by the image processing device by utilizing the difference in the luminance distribution from the image of the surveillance camera in the rotary kiln, and the display device. Since the combustion flame range can be displayed on a cross-sectional view with a distance scale in the longitudinal direction of the rotary kiln, the observer can easily and accurately recognize the combustion flame range in the rotary kiln, and a stable There is an effect that a combustion operation can be performed.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing an embodiment of a device abnormality detection system according to the present invention.

FIG. 2 illustrates a display example of a display device.

FIG. 3 is a diagram showing an example of a conventional device abnormality detection system.

FIG. 4 is a display example in a conventional device abnormality detection system.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rotary kiln 2 Burning flame 3 Surveillance camera 5 Image processing device 6 Display device 61 Input device 7 Rotary kiln sectional view 8 Scale 9 Burning flame part 10, 11 Boundary line of normal range of burning flame

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Miyazaki Osamu 2-5 Marunouchi, Takamatsu City, Kagawa Prefecture Inside Shikoku Electric Power Company (72) Inventor Akira Shimada 12-56, Wakaba-cho, Tadotsu-cho, Nakatado-gun, Kagawa Prefecture Shikoku Measurement Industrial Co., Ltd. (72) Inventor Gakuji Tayo 2217-7 Shinmachi, Hayashi-cho, Takamatsu-shi, Kagawa Prefecture Shikoku Keisoku Co., Ltd.Tachibana Bay Thermal Power Plant Preparation Room (72) Inventor Akira Oya 2-chome Nakamachi, Musashino-shi, Tokyo No. 9-32 Inside Yokogawa Electric Corporation (72) Inventor Toshio Adachi 2-9-1 Nakamachi, Musashino City, Tokyo Inside Yokogawa Electric Corporation (72) Takashi Kawano 2-9-1 Nakamachi, Musashino City, Tokyo No. 32 Inside Yokogawa Electric Corporation

Claims (3)

[Claims] 1. A surveillance camera for photographing a combustion flame in a rotary kiln, an image processing device for detecting a combustion flame range from an image of the surveillance camera, and an input device for inputting a numerical value indicating a normal range of the combustion flame. And a display device for displaying a combustion flame range in the axial direction of the rotary kiln from a result of the image processing device and displaying a boundary of a normal range of the combustion flame based on a numerical value from the input device. Equipment abnormality detection system. 2. The apparatus abnormality detection system according to claim 1, wherein said image processing apparatus detects a combustion flame range based on a difference in luminance distribution from an image of said monitoring camera. 3. The display device according to claim 1, wherein a combustion flame range and a line segment indicating a normal range of the combustion flame are simultaneously displayed on a sectional view of the rotary kiln on which a distance scale in an axial direction is attached. The device abnormality detection system according to claim 1 or 2, wherein: