JPH08205128A - Control sequence status observation device - Google Patents

Abstract

(57) [Abstract] [Purpose] A control sequence state observation device capable of reliably and easily observing the sequence control state (time chart) of a control device for controlling plant equipment or machinery. [Structure] A camera 2 with a high-speed shutter for photographing a relay group 7 with operation indicators in a relay control device 1, an image processing device 3 for binarizing a captured image of the camera, and an operation indicator lamp for controlling the camera. It is possible to detect the abnormality in the system by detecting the lighting state of the relay group at regular intervals and graphically displaying the operating state of the relay group on the monitor 5 in time series from the obtained binary image 8. is there.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control sequence state observing device for observing a sequence control state (time chart) of a control device for controlling plant equipment and machinery and detecting an abnormality.

[0002]

2. Description of the Related Art FIG. 5 is a block diagram of a conventional control sequence observation apparatus.

Conventionally, as shown in FIG. 5, the coil voltage of the control relay group 7 to be monitored is measured by the voltage measuring probe 100 of the multipoint recorder 120, or the auxiliary contact 9 is used.
The state is detected by the contact point measurement probe 110 by utilizing the, and recorded in on / 120 of the control relay group 7 to be observed.

Next, the recorded control sequence state at the present time is compared with the correct control sequence read from the design drawing, and the abnormality of the sequence is visually detected by a person.

[0005]

However, in the above-mentioned conventional technique, it takes a long time to prepare the wiring connection of the recorder 120 and the probes 100 and 110 in order to observe the sequence at the present time, and the observation is performed. Since the number of points itself is small, there are few observation points to investigate the cause of trouble when a failure occurs, it takes time to release the power to connect the wiring, turn on the power after connection, check, etc. There was a problem of getting up.

Further, since it is necessary to trace and read the correct control sequence from a large amount of design drawings by relying on the visual inspection of a person and then perform the comparison work, the correct control sequence may be misinterpreted or the control sequence at the present time. There was also a problem that it took a long time to compare with.

SUMMARY OF THE INVENTION An object of the present invention is to provide a control sequence state observing device capable of observing abnormalities in the sequence state of the control device reliably and easily in a short time.

[0008]

To achieve the above object, the present invention according to claim 1 provides a camera with a high-speed shutter for photographing a relay group with an operation indicator lamp in a relay control device, and photographing by the camera. An image processing device for binarizing an image, and controlling the camera to detect the lighting state of the relay group with operation indicators at a constant cycle, and the binarized image obtained from the obtained binarized image shows the operating state of the relay group in time series. It is equipped with a controller that displays graphics.

Further, in the present invention as set forth in claim 2, in the control sequence state observing device as set forth in claim 1, the correct sequence control state created in advance and the actual sequence control state photographed and observed by the camera are displayed. It is equipped with a controller that graphically displays different parts for comparison.

[0010]

According to the present invention as set forth in claim 1, the controller controls the camera with a high-speed shutter to photograph the relay group with the operation indicator lamp at a constant period to detect the lighting state, and the image processing device takes a photographed image. Is binarized and the operating state of the relay group is graphically displayed in time series, so that the sequence control state of the control device can be accurately shown as a graphical display in a short time.

Alternatively, according to the present invention as set forth in claim 2, the controller controls the camera with a high-speed shutter to observe the operation indicator lamp relay group at a constant cycle, and an actual sequence control state obtained in advance, Since the correct sequence control states are compared and the different portions are displayed graphically, the abnormality in the sequence control state of the control device can be accurately shown as a graphic display in a short time.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of a control sequence state observing apparatus according to an embodiment of the present invention. In the embodiment shown in FIG. 1, a group of relays 7 with operation indicators in a relay controller 1 for controlling a plant or mechanical equipment is photographed by a camera 2 with a high-speed shutter controlled by a shutter control signal 6 from a controller 4, The photographed operation indicator lamp group of the relay group 7 is extracted as a binarized image 8 by the image processing device 3.

The controller 4 controls the shutter of the camera 2 by the control signal 6 to receive the binarized image 8 of the group of indicator lights extracted by the image processing device 3 in synchronization with the shutter of the camera 2 and to control each control relay. It is subdivided into groups 7 and the operating state of relays is monitored as a timing chart in monitor
Output to and display. The above configuration corresponds to the first embodiment of the present invention as set forth in claim 1.

Further, in addition to the configuration of claim 1, the second embodiment shown as claim 2 inputs to the controller 4 the control sequence drawing of the observation target and the operating conditions of the control relays other than the observation target. , The control state of the control sequence of the observation target is automatically created in advance as a correct timing chart with reference, and the information is stored in the memory. This is a configuration in which the stored correct control sequence is compared with the previously observed control sequence, and a different portion is displayed on the monitor 5 to detect an abnormality.

FIG. 2 is a diagram showing an example of a photographing screen of the camera shown in FIG. FIG. 2 is a screen shot of the relay control device 1 when the shutter of the camera 2 is opened and closed by the shutter control signal 6 from the controller 4, and the controller 4 is a binarized image obtained from the image processing device 3 in the vertical direction. Direction (Y1s, Y1e, Y2s, Y2e ... Yns, Yn
e) and the lateral direction (X1s, X1e, X2s, X2e
(Xns, Xne), when the area setting line group 13 is set to the operation indicator lamp group 14 of the control relay group 7 to be observed, the control relay group 7 in the set area group 15, for example, (X1s, X1e) And the lighting state of the operation indicator lamp 14 such as the control relay Ry1 surrounded by (Y1s, Y1e) is extracted.

The controller 4 includes a control relay group 7
Speed sufficiently faster than the operating time of (for example, about 2 mS)
Then, since the shutter control signal 6 for periodically opening and closing the shutter of the camera 2 is output, the lighting state of the operation indicator lamp group 14 of the control relay group 7 synchronized with the shutter is binarized from the image processing apparatus 3. It can be obtained as image 8. Further, by using the lighting state and the shutter control signal 6 as a synchronization signal, the operating state of the control relay group 7 can be graphically displayed as a timing chart on the monitor 5 in time series. The above-described configuration of the hardware portion shown in FIGS. 1 and 2 is common to the first and second embodiments.

FIG. 3 is a process flow chart of the controller according to the first embodiment of the present invention. Next, the operation of the first embodiment will be described with reference to FIG. First, the controller 4 sets the operating time T (for example, 2 mS) of the camera 2 (S101). The controller 4 outputs the shutter control signal 6 as an open signal to the camera 2 in the cycle of the operation time T, reads the video signal from the camera 2 into the image processing device 3, and reads the binarized image 8 subjected to image processing ( S10
2). The controller 4 resets and starts the shutter control timer t based on the operation time T (S10).
3).

Subsequently, the controller 4 sets the observation area line group 13 and the number N of the observation area group 15 (S1).
04), the observation area counter i (however, i: 0 to N) is reset (S105).

The lighting state of the relay indicator lamp 14 in the observation area i is determined (S106), and here the controller 4
When the indicator lamp 14 is turned on, the position corresponding to the observation region i on the display screen is set to the lighting level, and when the indicator lamp 14 is turned off, the lighting level is set to the extinguishing level, thereby performing a graphic display as shown in the screen display 107.

The controller 4 increments the observation area counter to i = i + 1 (S108), and thereafter, the observation area counter i is preset to the number N of observation areas.
The process is repeatedly displayed on the screen (S109).

When the observation area counter i reaches i = N, which is the same as the number N of observation areas set in advance, the controller 4 displays one unit (for example, 1 dot or 1 unit) on the screen 107 in order to observe the next time. The number of dots for the time is moved to the right) (S110), and waits until the shutter control timer t reaches the preset shutter operation time T (S1).
12) At time T = t (S111), the shutter control signal 6 (open command) is output to capture the next image (S113).

Thereafter, by repeating the same process, the sequence operation state of the relay group 7 can be graphically displayed in time series as shown on the screen display 107.

FIG. 4 is a process flow chart of the controller according to the second embodiment of the present invention. Next, the operation of the second embodiment will be described with reference to FIG. FIG. 4 shows the processing in the controller 4 as an operation flow for each functional block.

First, the binary image 8 of the control relay group 7, which is the current observation target, is read from the binary image reading unit 16 composed of the camera 2 and the image processing device 3 and the like, as shown in the first embodiment. The sequence status creation unit 17 that performs the above-described processing creates the time chart 20 of the control sequence.

On the other hand, the sequence drawing 18 of the observation target control relay section is input from the design drawing, and the sequence state creating section 19 creates the time chart 21 of the correct control sequence.

ON-OFF and OFF of the created observation sequence state 20 and correct control sequence state 21
~ The change state to ON is detected by each state change detection unit 22 and 23, and ON for all the control relay groups 7 to be observed.
The number of appearances to OFF and the number of appearances to OFF to ON are integrated by the state change composition units 24 and 25 and combined.

The state change comparing section 26 compares the results created by the state change synthesizing sections 24 and 25. For example, the A section of the state change synthesizing section 25 and the B section of the state change synthesizing section 24 are different. Is detected and is output to the screen of the monitor 5 as in the part C of the abnormality detection output 27 to notify the abnormality.

As described above, in the present embodiment, the state change of each control sequence state and the number of appearances are combined and compared, so that the abnormality is much faster than the comparison of each control relay group 7 individually. It can detect and respond.

Although the image processing apparatus 3 and the controller 4 have been described as separate configurations in both the first and second embodiments,
In practice, the image processing device 3 may be incorporated in the controller 4 and configured as a single processing device. A general-purpose personal computer may be used as the controller 4. All of these belong to the free design range of the present invention.

[0031]

As described above, the control sequence state observing device of the present invention as set forth in claim 1 is a camera with a high-speed shutter for photographing a relay group with an operation indicator lamp in a relay control device, and a photographing by the camera. An image processing device for binarizing an image and a camera, controlling the camera to detect the lighting state of the relay group with operation indicator lamps at fixed intervals, and displaying the operation state of the relay group graphically in time series from the obtained binarized image. Since the controller is provided, the sequence state of the control device can be observed reliably and easily in a short time, and the observation result can be displayed by the graphic display with good visibility.

Further, the control sequence state observing device of the present invention as defined in claim 2 is different by comparing the actual sequence control state photographed and observed by the camera with a high-speed shutter with the correct sequence control state created in advance. Since it has a controller that graphically displays the part,
Abnormalities in the sequence state of the control device can be detected reliably and easily in a short time, and the observation results are also graphically displayed, so visibility is good, and it is possible to investigate the cause of trouble when a failure occurs and test the control device. It can be widely applied.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a control sequence state observation device according to an embodiment of the present invention.

FIG. 2 is a diagram showing an example of a screen shot by the camera shown in FIG.

FIG. 3 is a process flow chart of the controller according to the first embodiment of the present invention.

FIG. 4 is a process flow chart of a controller according to a second embodiment of the present invention.

FIG. 5 is a configuration diagram of a conventional control sequence state observation device.

[Explanation of symbols]

 1 relay control device 2 camera with high-speed shutter 3 image processing device 4 controller 5 monitor 6 shutter control signal 7 relay group with operation indicator light 8 binarized image signal 13 area setting line group 14 operation indicator lamp 15 observation area

Claims (2)

[Claims] 1. A camera with a high-speed shutter for photographing a relay group with operation indicator lights in a relay control device, an image processing device for binarizing an image captured by the camera, and the operation indicator lamp for controlling the camera. An apparatus for observing a control sequence state, comprising a controller that graphically displays the operating state of the relay group in time series from a binarized image obtained by detecting the lighting state of the relay group with a fixed period. 2. A camera with a high-speed shutter for photographing a group of relays with operation indicators in a relay control device, an image processing device for binarizing an image photographed by the camera, and a correct sequence control state created in advance. An apparatus for observing control sequence states, comprising a controller for comparing actual sequence control states photographed by a camera and observing them and graphically displaying different portions.