JPH01140296A - Equipment monitor system - Google Patents

Abstract

PURPOSE:To examine the transition of generating an abnormality and to maintain an equipment by detecting the abnormality in an area by a first infrared camera, image picking up by a visible camera 2 and a second infrared camera, taking out a video signal in the vicinity of the generation of the abnormality stored in respective memories and displaying. CONSTITUTION:The monitor equipment area 1 is simultaneously image picked up by the infrared cameras 14, 15 and the visible camera 2 of the same visual field. An abnormal signal in the video signal of the camera 14 is detected in a detecting circuit 16 and a trigger signal circuit 17 generates a trigger signal by this abnormal signal. The video signals of the visible camera 2 and the infrared camera 15 are respectively sequentially stored in the memories 18, 19 for plural screens, read by the trigger signal and displayed on respective display devices 9-1, 9-2. According to this constitution, the abnormality due to the rise in temperature in a power equipment area and the elapse of a discharged state due to a thunderbolt are understood to effectively maintain the equipment.

Description

[Detailed Description of the Invention] [Summary] A system for monitoring equipment such as electric power equipment by combining an infrared camera and a visible camera to detect accidents caused by abnormalities or temperature rises in electric power equipment at night before they occur. The purpose of this system is to provide a monitoring system that can perform preventive maintenance of equipment by checking for damage caused by lightning strikes, etc. An abnormal signal detection circuit that simultaneously captures images with a camera and detects an abnormal signal in the video signal of the first infrared camera, and a trigger signal generation circuit that generates a trigger signal based on the abnormal signal, and the visible camera and First and second memory sections are provided that sequentially store video signals from a second infrared camera for a plurality of screens, and the video signals stored in the first and second memory sections are read out in response to the trigger signal. Configure it so that it is displayed on the display.

[Industrial application field]

The present invention relates to an equipment monitoring system, and in particular, it uses a combination of an infrared camera and a visible camera to detect temperature abnormalities within equipment and the progress of electrical discharge phenomena caused by lightning strikes, etc. with high accuracy, and to identify the cause of accidents in power equipment, etc. The present invention relates to an equipment monitoring system that performs effective equipment maintenance.

In power facilities such as power generation and substations, the situation is automatically monitored day and night from a remote location for temperature rises in the equipment, lightning strikes, electric shock accidents, etc., so that power outage accidents can be resolved early and the situation can be checked to prevent accidents to the extent that they occur. It is necessary to detect temperature rises in advance and perform preventive maintenance, and there is a need for a power equipment monitoring system for this purpose.

[Conventional technology]

FIG. 6 shows a block diagram of a conventional power equipment monitoring system.

A conventional power equipment monitoring system includes a visible camera 2 that images the inside of a power equipment area l, a transmitting device 3 that transmits a video signal obtained by the visible camera 2, and a transmitting device 3 that receives the video signal transmitted from the transmitting device 3. A control system consisting of a receiving device 6, a display 9 that displays images of received video signals, a central console 10 that controls monitoring of each power facility, a control transmitting device 11, a control receiving device I2, and a camera controller 13. It consists of system equipment. Note that the transmitter 3 uses an A/D converter 4 and a modulator 5, and the receiver 6 uses a demodulator 7 and a D/A converter 8.

Receiving device 61 display 9. Centralized control console 10. A control transmitting device 11 is installed in a central monitoring room, and includes a visible camera 2. Transmitting device 3. Camera controller 13. The control receiving device 12 is installed at each power equipment monitoring station.

The operation will be explained below.

The visible camera 2 images the inside of the power area I and outputs a video signal (analog signal). This output analog signal is A/D
After being converted into a digital signal by the converter 4, it is modulated into a laser beam by the modulator 5 and transmitted to the demodulator 7 of the receiver 6 via the optical fiber 21.

The demodulation signal tFtHn"t demodulates the input modulation signal into a digital signal, and the digital signal is converted into an analog video signal in the D/A converter 8, and then subjected to image processing in the display 9.
An image is displayed for each pattern.

Also, an azimuth control signal is sent from the central console 10 to change the imaging direction of the visible camera 2 via the control transmitter 11, control receiver 12, and camera controller 13, and the image is taken in an arbitrary direction. We are monitoring each power facility.

[Problem that the invention seeks to solve]

The above-mentioned monitoring system using a visible camera requires constant monitoring by a monitoring person and cannot be unmanned. In addition, since image monitoring is performed by transmitting still images, it is impossible to find the cause of equipment failure from a central monitoring room located in a remote location because it takes too much time. There is a problem in that it is not possible to know about accidents caused by temperature, and it is not possible to perform preventive maintenance in this regard.

The present invention was created in view of these points, and is capable of detecting accidents caused by nighttime abnormalities or temperature rises in power equipment, or by investigating failures caused by lightning strikes, etc., to perform preventive maintenance of equipment. The purpose is to provide a power equipment monitoring system that can perform the following tasks.

[Means for solving problems]

FIG. 1 shows a principle block diagram of the equipment monitoring system of the present invention, in which an equipment area 1 is imaged by first and second infrared cameras 14, 15 and a visible camera 2 having the same field of view,
An abnormal signal detection circuit 16 that detects an abnormal signal in the video signal of the first infrared camera 14 and a trigger signal generation circuit 17 that generates a trigger signal based on the abnormal signal are provided. First and second memory sections 18 and 19 are provided to sequentially store video signals from the external camera 15 for a plurality of screens, respectively, and the trigger signal causes the first
The video signals stored in the second memory section 18.19 are read out and displayed on the first and second displays 9-1.9-.
2 is configured to be displayed.

[For production]

First and second infrared cameras 14.15 and visible camera 2
have the same field of view and simultaneously image the equipment area.

The abnormal signal detection circuit 16 detects an abnormal signal indicating an increase in the temperature of the equipment, a discharge phenomenon caused by a lightning strike, a person intruding into the equipment at night, etc. from the video signal inside the equipment captured by the first infrared camera 14. do. This abnormal signal is generated by the trigger signal generation circuit 17.
The trigger signal is converted into a trigger signal and applied to the first and second memory sections 18 and 19.

The video signals of the area imaged by the visible camera 2 and the second infrared camera are stored in the first memory section 18 and the second memory section, respectively.
A plurality of screens are sequentially stored in the memory unit 19 of the computer. The stored video signals for multiple screens are read out by applying the trigger signal representing the abnormality, and are read out from the first and second screens, respectively.
It is displayed on the display 9-1.9-2.

According to the present invention, the first infrared camera 14 detects an abnormality within the area, the visible camera 2 and the second infrared camera 15 capture images, and the images are stored in the first and second memory units 18 and 19. The video signals before and after the occurrence of the abnormality are extracted and displayed on a display to check the progress of the abnormality occurrence.

〔Example〕

FIG. 2 shows a block diagram of a power equipment monitoring system according to an embodiment of the present invention, and the same parts as in FIG. 6 are indicated by the same symbols.

The power equipment monitoring system of one embodiment includes first and second infrared cameras 14.1 having the same field of view over the power equipment area l.
5 and visible camera 2 at the same scanning timing, and
An abnormal signal detection circuit 16 that detects an abnormal signal in the video signal of the infrared camera 14 and a trigger signal generation circuit 17 that generates a trigger signal based on the abnormal signal are provided. First and second memory units 1 that sequentially store 15 video signals in units of multiple patterns
8.19 is provided, the unit patterns stored in the first and second memory sections 18.19 are read out by the trigger signal, and the read video signals in units of a plurality of patterns are transmitted to the first and second transmitting devices. 5-1.5-2 and the first and second receiving devices 6-1.6-2 from the terminal station to the central monitoring room and the first and second display devices 9-1.
．． 9-2.

The operation will be explained with reference to the abnormal signal detection circuit diagram in FIG. 3, the schematic diagram of memory section operation in FIG. 4, and the signal waveform and image diagram in FIG.

FIG. 5A shows the first and second infrared cameras 14 and 15.
A1 in the figure shows an image of the power area in a normal state, and A2 shows an image of a fire a2 occurring in equipment a1. Figure B shows the video signal waveform of the true infrared camera, and when the temperature rises due to a fire or the like, the video signal level (indicated by a2) increases. Also, Figure 5C
shows an image captured by the visible camera 2.

The video signal of the power area equipment imaged by the first infrared camera 14 is input to one input terminal a of an abnormal signal detection circuit 16 consisting of a comparison circuit 20 shown in FIG.

A reference voltage VO representing a normal state is applied to the other input terminal of the comparator circuit 20, and the comparator circuit 20 compares the re-input signal level and detects a fire state when the level is higher than the standard voltage VO. Detect the a2 signal representing This a2 signal is converted into a trigger signal in the trigger signal generation circuit 17 and output to the first and second memories 18 and 19.

Video signals captured by the second infrared camera 15 and the visible camera 2 are sequentially input to the first and second memories 18 and 19. As shown in FIG. 4, the first and second memory sections sequentially shift register, for example, five patterns for each pattern. Now, an abnormality is detected in the pattern of NO3 and the trigger signal a2 is sent to the first and second memory sections 1.
8.19, the first and second memory sections 18
．． 19 is the two patterns before and after the pattern of NO3 (Not
.
-2, the optical fiber 21, and the first and second receiving devices 6-1.6-2 to transmit from the terminal station to the central monitoring room, and the first and second displays 9-1.9 -2 is displayed and recorded.゛In this way, when an abnormality occurs in power equipment, by displaying images before and after the abnormality and examining the condition of the equipment before and after the abnormality, it is possible to catch signs of an abnormality, identify the cause, and take future maintenance measures. I'm getting the materials.

Normally, visible images with good resolution are mainly used, but infrared images obtained by a second infrared camera are used to examine abnormalities at night.

In addition, in a normal state, visible images and infrared images taken by the visible camera 2 and the second infrared camera 15 are displayed in the conventional manner, and visible images are displayed during the day and infrared images are displayed at night in the power equipment area. Conduct internal monitoring.

The fifth diagram shows the second infrared camera 15 monitoring the entry of a person into the area, and detects the body temperature of the person (animal) to monitor entry into the area.

In this embodiment, first and second infrared cameras 14.
15 uses an infrared camera sensitive in the 3-5.5 μm wavelength range to detect the temperature in the power equipment area,
We are investigating the effects of surge currents such as lightning strikes by detecting released nitrogen oxides (No) with a spectrum of 5 to 2 μm, which occur during electrical power equipment discharge phenomena caused by lightning strikes, flying objects, or human causes.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to know the progress of abnormal conditions due to temperature rise in power equipment areas and discharge conditions due to lightning strikes, etc., and it is possible to prevent power outages and perform effective equipment maintenance.

[Brief Description of the Drawings] Fig. 1 is a principle block diagram of the equipment monitoring system of the present invention, Fig. 2 is a block diagram of an electric power equipment monitoring system of one embodiment, and Fig. 3 is an abnormal signal detection circuit of one embodiment. 4 is a schematic diagram for explaining the operation of the memory section of one embodiment. FIG. 5 is a schematic diagram of signal waveforms and images for explaining the operation of the power equipment monitoring system of one embodiment. FIG. 1 is a block diagram of a conventional equipment monitoring system. In the figure, 1 is the equipment area, 2 is the visible camera, 3 is the transmitter, 4.4
-1.4-2 is an A/D converter, 5 is a modulation section, 5-1.5
-2 is the first. Second transmitter, 6 is the received value! , 6-1.
6-2 is the first. 2nd receiving device, 7 is IR tuning section, 8 is D
/A converter, 9.9-1.9-2 is a display, 10 is a central console, 11 is a control transmitter, 12 is a control receiver, 13 is a camera controller, 14 is a first infrared camera, 15
is the second infrared camera, 16 is the abnormal signal detection circuit, 17 is the trigger signal generation circuit, 18 is the first memory section, 19 is the second memory section, 20 is the ratio, 9J4＾實2刹噺呵 summer de begging〉Stage 4 fake fruit 7m Figure 1 - Lost usu il Dentomo J-A - Bow 1PL system de Otsu's 7' lock diagram Figure 2 11! + Kazuya and others say Summer 4RF is published in history Figure 3

Claims (1)

[Scope of Claims] First and second devices having the same field of view of the monitoring equipment area (1)
an abnormal signal detection circuit (16) that simultaneously captures an image with an infrared camera (14, 15) and a visible camera (2) and detects an abnormal signal in a video signal of the first infrared camera; A trigger signal generation circuit (17) that generates a trigger signal is provided, and the visible camera (2) and the second infrared camera (15) are provided.
first and second memory sections (18, 19) each sequentially storing video signals for a plurality of screens are provided, and the video signals stored in the first and second memory sections are read out by the trigger signal. An equipment monitoring system characterized by displaying information on display devices (9-1, 9-2).