JPS63278198A - Monitoring device - Google Patents

Abstract

PURPOSE:To reduce the load of monitoring operation by making a monitor display by a display command means provided to a center monitoring device part. CONSTITUTION:If one monitoring device part STj among monitoring device ST1-STN becomes abnormal, an encoding output EN1 corresponding to the number of its decision output DTj is supplied to a latch circuit 15 through a selecting circuit 12, a latch signal generating circuit 13 generates a latch output, S1, and the latch circuit 15 selects a select output SEL with a latch command signal S2 from an OR circuit 14. Thus, the video signal VDj of a monitoring point where the abnormality occurs is displayed automatically on a monitor 18 through a video signal switching circuit 16. In addition, a center monitoring device CWA display corresponding video signals VD1-VDN on a monitor 18 automatically when display command means DIS1-DISN are operated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a monitoring device, and is particularly suitable for application to a monitoring device such as a security device using a plurality of television cameras.

[Summary of the invention]

The present invention provides a monitoring device configured to monitor a plurality of monitoring points using a television camera, in which a corresponding video signal is monitored by abnormality detection signals from a plurality of monitoring device units provided corresponding to each monitoring point. By displaying the information on the screen and displaying it on the monitor using the display command means provided in the central monitoring device, a monitoring device with a relatively simple configuration that can further reduce the burden of monitoring work on the monitor has been realized. It is possible.

[Conventional technology]

In conventional security devices using television cameras,
Television cameras are installed at multiple locations to be monitored (these are called monitoring points) such as entrances, passages, and rooms, and the video signals obtained from each television camera are transmitted to a monitor installed in a manager's room, for example. A system is used that allows multiple monitoring points to be monitored remotely by displaying images on a display screen.

However, with this type of security device, conventional methods have been to install a monitor compatible with multiple television cameras for each camera, or to switch the video signals transmitted from multiple television cameras at regular intervals to display a single monitor. A method is adopted in which images are displayed one after another on a monitor screen.

If multiple monitor screens are provided, the supervisor must visually check all the screens for abnormalities at all times, which inevitably increases the burden of monitoring work on the supervisor. . In addition, in the case of a method in which multiple images are sequentially switched, each time the images are switched, it is necessary to visually judge whether there is an abnormality on each screen, which also places an excessive burden on the monitor. This is the result.

[Problem that the invention seeks to solve]

One method to solve this problem is to sequentially select and internalize video signals obtained from multiple television cameras using a selector, and use a common determination means to determine whether or not there is an abnormality in the multiple video signals. By this,
A monitoring device has been proposed that is capable of monitoring multiple monitoring points with a relatively simple configuration and that reduces the burden on the monitor as much as possible (Japanese Patent Laid-Open No. 60-2
64180).

However, in this method, the entire monitoring device is controlled by a common determination means (in practice, for example, a central processing unit (cPU) configured with a microcomputer is used) for multiple monitoring points. Difference for each = 3 = This cannot be applied to a monitoring system in which a monitoring device having a CPU that determines the presence or absence of normal conditions is separately provided near each television camera at each monitoring point.

The present invention has been made in consideration of the above points, and in a monitoring system that is provided with determination means for determining the presence or absence of an abnormality at each of a plurality of monitoring points, the present invention further improves the ability of a supervisor to monitor by using a configuration that is as simple as possible. This paper attempts to propose a monitoring device that can reduce the workload.

[Means for solving problems]

In order to solve this problem, the present invention provides a plurality of television cameras C corresponding to a plurality of monitoring points.
RI, CR2... In a monitoring device configured to capture an image using CRN and display it on the monitor 18,
Television camera CRI, CR2...CRN
Video signals obtained from ■DI, ■D2...VD
a plurality of monitoring device units STI, Sr1...STN that determine an abnormality at the monitoring point being imaged based on N and send out abnormality detection signals DT, DT2...DTN; Multiple monitoring device units STI, Sr1...ST
N video signals VD0, ■D2...VDN and abnormality detection signals DT1, DT2/old...DT.

Upon receiving the abnormality detection signal DT, , DT2...
- Monitoring device section STI, Sr1 that generated DT...
The central monitoring device CWA automatically displays the video signals VD, , VD2, old... VDN obtained from the STN on the monitor 18, and the central monitoring device CWA further includes display command means DISL and DIS2 that can be manually operated.・・・・・・
DISN, this display command means DISI, DIS2
...When one of the monitoring points is specified by DISN, the corresponding video signal VD, , VD2...
...The VDN is manually displayed on the monitor 18.

[Effect]

If an abnormality occurs at one of the plurality of monitoring points, the corresponding monitoring device section ST1, Sr1...STN
is determined and the abnormality detection signal DT, , DT,...
Generate DTN. At this time, the central monitoring device CWA outputs the corresponding video signals VD, , VD2...VD
N is automatically displayed on the monitor 18.

In addition to this, the central monitoring unit CWA has a display command unit DI.
SL, DIS2... When DISN is operated, the operated display command means DISI, DIS2...
...Video signal VD,, ■D2, corresponding to DISN
...Manually display the vDN on the monitor 18.

In this way, when an abnormality is detected from any one of a plurality of monitoring points, it can be automatically displayed immediately on the monitor 18 of the central monitoring unit CWA, so that a supervisor can easily visually check the occurrence of an abnormality. Can be confirmed. In addition, by specifying one of the monitoring points using the display command means DISL, DIS2...DISN and manually displaying the corresponding video signal on the monitor 18, multiple monitoring points can be displayed. It is possible to easily realize a monitoring device with a simple configuration that can further reduce the burden on the monitor during monitoring.

〔Example〕

An embodiment of the present invention will be described in detail below with reference to the drawings.

In FIG. 1, 1 indicates the monitoring system as a whole;
Monitoring device sections ST1, Sr1 installed at multiple monitoring points
...Central monitoring unit CWA common to STN
is provided.

The monitoring device units STI, Sr1...STN include television cameras CRI, CR2... that capture images of monitoring points.
...CRN and its video signals VD, , VD2...
...Determination device J that receives VDN and determines whether there is an abnormality.
D1, JD2...JDN.

Judgment devices JDI, JD2...JDN determine that an abnormality has occurred when the video of the video signal VD+1VD2...VDN changes by more than the allowable value, and determines the logic rLJ level. Output DT'+, DTz...
...Inputs the DTN to the monitoring information input circuit 11 of the central monitoring unit CWA.

The monitoring information input circuit 11 is composed of an encoder circuit,
Judgment output DT, , DT2... One of the N line inputs input by DTN is logic rHJ
When the level falls to the logic rLJ level, this is converted into, for example, a 4-bit encoded output EN.

The encode output EN, is the judgment output DT, DT2...
...When all DTs are at the logic rHJ level, all bits of the encode output EN are held at the logic "H" level, and from this state the judgment outputs DT + , DT
z...When one of the DTNs falls to the logic "L" level, it sends out an encode output EN consisting of the code assigned to the judgment output that fell to the logic "L" level. .

Thus, when one or more of the 4-bit encode outputs EN falls to the logic rLJ level, the encode output EN representing the number of the monitoring point where the abnormality has occurred,
is selected as monitoring information from the monitoring information input circuit 11 by the selection circuit 1.
2's first input terminals A1 to A4 and the latch signal forming circuit 1
Sent on 3rd.

Here, the selection circuit 12 has a logic rLJ at the selection signal input terminal.
When a level selection signal is applied, the first input terminal A1
The input signals of ~A4 are sent to the output terminals 01 to C4, and when a selection signal of logic rHJ level is applied to the selection input terminal, the input signals of the second input terminals B1 to B4 are sent to the output terminals 01 and 01. ~ Send to C4.

The latch signal forming circuit 13 is composed of a four-way NAND circuit, and generates a latch output S that rises to the logic rHJ level when at least one bit of the encode output EN falls to the logic rLJ level, and outputs this to the OR circuit 14. It is applied to the latch circuit 15 as a latch command signal S2 through the latch circuit 15. At this time, the latch circuit 15 is connected to the output terminal 0 of the selection circuit 12.
The selection outputs SEL obtained from signals 1 to C4 are latched, and the latched outputs LAT are supplied to a video signal switching circuit 16 having an analog port and a gate switch configuration.

The video signal switching circuit 16 is connected to the monitoring device section STI, Sr1.
...STN video signal VD2, VD2 old...V
Upon receiving DN, the video signal of the number specified by the latch output LAT is supplied via the buffer amplifier circuit 17 to a monitor 18 made of, for example, a cathode ray tube display device.

In this embodiment, the monitor 18, as shown in FIG. DISI, DIS2...DI
SN is provided.

Display command switch DISL, DIS2...DI
SN is a command switch for manually selecting the monitoring device section that the supervisor wants to visually check among the monitoring device sections STI, Sr1...STN and displaying the image on the monitor 18. Display command output CMl, CM2・
...Input CMN to the display command input circuit 25.

The display command input circuit 25 outputs N display commands CM, , C.
M2...4-bit encoded output of CMN E
Consists of an encoder that converts into N, monitoring information human power 1
1, display command switches DIS1, DIS2...
. . . When DISN is not operated, the display command outputs CM, , CM2, .

From this state, display command switches DISL, DIS2...
...When one of the DISN is operated and the corresponding display command output among the display command outputs CM, CM2...CMH falls to the logic rLJ level, the operated display command An encode output EN2 consisting of a 4-bit code signal representing the switch number is supplied to the selection circuit 12 and the latch signal forming circuit 26.

The latch signal forming circuit 26 is composed of a four-way NAND circuit, and when at least one bit of the encode output EN2 falls to the logic rLJ level, the latch output S3, which rises to the logic rHJ level, is sent to the latch circuit via the OR circuit 14. 15 as a latch command signal S2, and the latch output S3 is applied to the selection signal input terminal of the selection circuit 12 as a selection signal.

Thus, the display command switches DISI, DIS2...
...When one of the DISNs is selected and a bit of logic rLJ level -11= is generated in the encode output EN2, the latch output S3 is generated from the latch signal forming circuit 26 in response to this, and this latch Output S
3, the selection circuit 12 is forced to select the input terminals B1 to B4.
The encode output EN is switched to the state where it is sent to the output terminals C1 to C4, and thus the encode output EN
A selection output SEL consisting of 2 is supplied to the latch circuit 15.

At this time, based on the latch output S3, the latch command signal S2 is
As a result, the latch circuit 15 latches the selection output SEL, and the video signal switching circuit 16 supplies the video signal corresponding to the latch output LAT to the monitor 18 via the buffer amplifier circuit 17. There is.

In the above configuration, the monitoring device section STI, Sr1...
...STN determination device JDI, JD2...J
The judgment outputs DT+ -DT2...DT of the DN are in an abnormal judgment state (and the supervisor has not activated the display command switches DISL, DIS2...D on the operation panel 22).
If the ISN is not being operated, the encode output EN of the monitoring information input circuit 11 and the display command input circuit 2
Since each bit of the encode output EN2 of No. 5 is at the logic rHJ level, the latch circuit 15 is in an initial state in which it is not performing a latch operation.

In this initial state, the video signal switching circuit 16 transfers a video signal of a predetermined number from among the video signals VD, , VD, . . . VDN to the buffer amplifier circuit 16.
7 to the monitor 18. In this way, the monitor monitors the image of the predetermined monitoring point.
This can be visually confirmed by

In this state, the monitoring device section STI, Sr1...
- One of the STNs, for example, the j-th monitoring device section ST
If an abnormality occurs in j, an encode output ENI corresponding to the number of the judgment output DTj is supplied to the latch circuit 15 via the selection circuit 12, and a latch output SI is generated from the latch signal forming circuit 13. The latch circuit 15 outputs the selected output SEL by the latch command signal S2.
Latch. The video signal VDj of the monitoring point where the abnormality has occurred passes through the video signal switching circuit 16 and is displayed on the monitor 18.

Since the monitor 18 is switched from its initial state, the supervisor can easily visually confirm that an abnormality has occurred.

In this state, the supervisor turns on the display command switch DISI,
DIS2......If you select the th display command switch DISk among DISN and perform the display command operation,
In response to this, the latch signal forming circuit 2
By generating the latch output S3 from 6, the encode output E N z becomes the selection output SE via the selection circuit 12.
It is latched by the latch circuit 15 as L, and the corresponding video signal Dk is displayed on the monitor 18 via the video signal switching circuit 16 according to the latch output LAT.

Therefore, when there is no abnormality in the monitoring points, the supervisor can select the monitoring point that he or she wants to visually check and display the image on the monitor 18, and when there is an abnormality in any of the monitoring points, the supervisor can select the monitoring point and display the image on the monitor 18. For example, if you want to check the status of other monitoring points, press the display command switch DIS.
I, DIS2...can be expressed.

. . . An image of the monitoring point to be checked can be displayed on the monitor 18 by a simple operation of selecting it from the DISN and issuing a command.

According to the above configuration, when an abnormality occurs at any of the monitoring points using a relatively simple configuration, the display on the monitor changes to an image showing the monitoring point where the abnormality has occurred. It is possible to obtain a monitoring device that allows a supervisor to reliably visually confirm this. (However, by manually specifying a desired monitoring point, the status of the monitoring point can be easily displayed on the monitor as needed, which reduces the overall monitoring work of the monitor.) By reducing the above burden, it is possible to realize a monitoring device that is even easier to use.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to easily implement a monitoring device with a simple configuration that can further reduce the burden of monitoring work on a supervisor when monitoring a plurality of monitoring points.

[Brief explanation of drawings]

FIG. 1 is a line connection diagram showing one embodiment of a monitoring device according to the present invention, and FIG. 2 is a front view showing an operation panel of a central monitoring device section. 1...Monitoring system, 11...Monitoring information input circuit, 12...Selection circuit, 15...
...Latch circuit, 16...Video signal switching circuit,
18...Monitor, ST1~STN...
Monitoring equipment section, CRI~CRN...Television camera, JDI~JDN...Judgment device, DIS
I~DISN...Display command switch.

Claims (1)

[Claims] A monitoring device configured to take images of a plurality of monitoring points using a plurality of corresponding television cameras and display the images on a monitor, wherein images are taken based on video signals obtained from the television cameras. a plurality of monitoring device sections that determine an abnormality at the monitoring points located at the monitoring point and send out an abnormality detection signal; and a monitoring device that generates the abnormality detection signal in response to the video signal and the abnormality detection signal of the plurality of monitoring device sections. a central monitoring device section that automatically displays the video signal obtained from the device section on the monitor, and the central monitoring device section further has a display command means that can be manually operated, and the display command means controls the monitoring point. A monitoring device characterized in that when one of the video signals is designated, the corresponding video signal is manually displayed on the monitor.