KR20110089758A - Elevator monitoring system and operating method thereof - Google Patents

Abstract

PURPOSE: A monitoring system, for elevator, and an operation method thereof are provided to analyze the cage inside image which is automatically taken without separate manpower. CONSTITUTION: A monitoring system, for elevator comprises an elevator cage(20), a camera(30), and a control device(50). The elevator cage ascends and descends along a hoistway within a building. The camera takes a photograph of the inside of the elevator cage. The control device analyzes a moving picture of the elevator cage inside and controls the elevator cage according to a result.

Description

Elevator monitoring system and its operation {ELEVATOR MONITORING SYSTEM AND OPERATING METHOD THEREOF}

The present invention relates to an elevator monitoring system and a method of operating the same to monitor the various situations occurring inside the elevator in real time so that the elevator can be safely operated by taking safety measures when an emergency occurs.

Since the elevator is a space disconnected from the outside, the internal situation is not known from the outside, so it is often difficult to take appropriate safety measures even when an emergency occurs.

In particular, elevators can injure people in the event of an accident, so it is very important to take safety measures in the event of an emergency.

Therefore, in the related art, various methods have been developed to cope with emergency situations occurring in an elevator, and specific methods are as follows.

1 is a crime prevention recognition apparatus for an elevator described in FIG. 1 of Korean Utility Model Model No. 236,993.

The design described in Korean Utility Model Registration No. 236,993 is characterized in that the sensor member 2 is installed inside the elevator 1, and the sensor member 2 monitors the internal state by detecting a change in body temperature or a loudness of the occupant. It is done.

For example, the sensor member 2 detects this change when the body temperature of the person aboard the elevator 1 suddenly rises or suddenly screams at high frequencies. When the sensor member 2 detects a change in body temperature or a change in sound volume, the control device outputs a warning sound through the buzzer inside the elevator 1, and additionally notifies the central control room of the situation so that the guard can be dispatched. .

However, there is a problem that the human body temperature is not a large change even in an emergency situation, and there is a problem in that the internal situation of the elevator 1 is not exactly known only by the fact that the sound change is large.

2 shows an image monitoring system of an elevator described in FIG. 1 of Korean Utility Model Model No. 180,862.

In the invention described in Korean Utility Model No. 180,862, the surveillance camera 34 installed inside the elevator cage 10 photographs the inside of the elevator cage 10 in real time.

In this case, when a passenger rides inside the elevator cage 10, a video photographing the passenger 30 boarded is displayed on the display device 24 outside the elevator cage 10. Then, the waiting passenger 26 can watch the video displayed on the display device 24 and can know the situation occurring inside the elevator cage 10. As a result, when an emergency situation occurs inside the elevator cage 10, the waiting passenger 26 may recognize the emergency situation through the display device 24 installed outside and report the internal situation to the central control room so that safety measures may be taken. do.

However, if there are no passengers 26 waiting outside the elevator cage 10, even if the situation inside the elevator cage 10 is displayed on the display device 24, no one can take safety measures, and even if an emergency occurs, The problem is that the response can only be delayed because safety measures can only be taken after reporting the internal situation to the control room.

As described above, the prior art has a problem in that it is not possible to automatically and accurately recognize the emergency situation occurring inside the elevator, and there is a problem that cannot take immediate safety measures.

In order to solve the above problems, the present invention can analyze the video captured automatically even if a separate personnel does not monitor the video taken inside the elevator cage, and can take immediate safety measures when an emergency occurs according to the result Provides an elevator monitoring system and its operating method.

The present invention is an elevator cage for lifting along the hoistway in the building; An imaging device for photographing the inside of the elevator cage; And it provides an elevator monitoring system comprising a control device for analyzing the video taken inside the elevator cage, and controls the elevator cage according to the result.

The present invention comprises the steps of photographing the inside of the elevator cage; Analyzing a video taken inside the elevator cage; And controlling the elevator cage according to the analysis result of the photographing video.

The elevator monitoring system operation method analyzes the video shot in real time to determine whether there is an emergency, and immediately performs safety measures automatically in case of an emergency. The advantage is that it can be prevented.

The present invention uses the result of photographing the inside of the elevator cage in real time without the need to monitor the inside of the elevator cage by an external user or a central control room, so that the unmanned elevator monitoring system automatically The advantage is that it can be implemented.

In addition, the present invention has the advantage that a safety accident can be prevented by outputting a warning sound inside the elevator cage or forcibly stopping the elevator cage when an emergency occurs.

Preferred embodiments of the present invention are for purposes of illustration, and those skilled in the art can make various modifications, changes, substitutions and additions through the spirit and scope of the appended claims, and such modifications may be made by the following claims. Should be seen as belonging to.

1 is a crime prevention recognition apparatus for an elevator described in FIG. 1 of Korean Utility Model Model No. 236,993.
2 shows an image monitoring system of an elevator described in FIG. 1 of Korean Utility Model Model No. 180,862.
3 is a diagram illustrating an elevator monitoring system according to the present invention.
Figure 4 shows the operation of the elevator monitoring system according to a first embodiment of the present invention.
5 is a flowchart illustrating a method of operating an elevator monitoring system according to a first embodiment of the present invention.
6 is a flowchart illustrating a process of analyzing a video taken inside an elevator in a method of operating an elevator monitoring system according to a first embodiment of the present invention.
FIG. 7 illustrates a process of comparing the contours obtained from the actual captured video with the contours stored in the database in the operating method of the elevator monitoring system according to the first embodiment of the present invention.
8 shows the operation of the elevator monitoring system according to a second embodiment of the present invention.
9 is a flowchart illustrating a method of operating an elevator monitoring system according to a second embodiment of the present invention.
10 illustrates a process of analyzing a video taken inside an elevator in a method of operating an elevator monitoring system according to a second embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

3 is a diagram illustrating an elevator monitoring system according to the present invention.

Referring to FIG. 3, the elevator monitoring system according to the present invention includes an elevator cage 20, an imaging device 30, a first warning device 40, a control device 50, a driving device 60, and a second warning device. 70 and the display device 80 are included.

The imaging device 30 and the first warning device 40 are provided inside the elevator cage 20, and the second warning device 70 and the display device 80 are provided in the central control room outside the elevator cage 20. Can be.

The photographing apparatus 30 photographs the inside of the elevator cage 20 in real time, and transmits the photographed video to the control device 50.

The control device 50 analyzes the transmitted video, controls the operation of the elevator cage 20 according to the analysis result, and notifies the central control room of the analysis result.

The first warning device 40 outputs a warning sound inside the elevator cage 20 when the control device 50 determines the emergency situation as a result of analyzing the captured video inside the elevator cage 20.

In addition, the drive device 60 is controlled to stop by forcibly moving the elevator cage 20 to the nearest floor when it is determined that the emergency situation, the second warning device 70 outputs a warning sound to the central control room.

On the other hand, the display device 80 also operates to display in real time the video taken inside the elevator cage 20 in the central control room in the emergency situation or to record and display the video of the emergency situation.

4 is a flowchart illustrating an operation of an elevator monitoring system according to a first embodiment of the present invention, and FIG. 5 is a flowchart illustrating a method of operating an elevator monitoring system according to a first embodiment of the present invention.

The first embodiment of the present invention illustrates the case where the passenger 1 attempts to forcibly open the door 2 of the elevator cage 20.

When the elevator monitoring system according to the first embodiment of the present invention is started (S110), the photographing apparatus 30 captures the operation of the passenger 1 in the elevator cage 20 in real time (S120).

The control device 50 analyzes a video photographing the operation of the passenger 1 (S130). In general, a video is composed of a plurality of frames. For example, a video may play 60 frames continuously every second. A frame is a picture in which the subject is stationary, and playing a video means displaying 60 consecutive pictures every second.

Herein, the process of analyzing the elevator interior video is described with reference to FIG. 6. The process of analyzing the interior video of the elevator is started by the elevator monitoring system according to the first embodiment of the present invention (S131).

The control device 50 processes each frame included in the captured video as a binary image (S132).

Processing a frame as a binary image may mean expressing an image captured in the frame using only two pieces of information. For example, the image of the frame may be expressed in black and white.

After processing the frame as a binary image, the control device 50 extracts the outline of the subject from the frame (S133). Extracting the contour from the subject may mean extracting only the contour that distinguishes the subject from the background.

The controller 50 removes noise from the extracted contour and corrects the contour (S134).

Removing noise from outlines can mean deleting these outlines if some outlines are created in a completely different pattern from the surrounding outlines, and compensating outlines shows broken or blurred outlines that are in succession. In this case, it may mean that the contour is clearly displayed.

The control device 50 compares the contours shown in each frame with the contours stored in the database (S135).

This process will be described in detail with reference to FIG. 7.

FIG. 7 illustrates a process of comparing the contours obtained from the actual captured video with the contours stored in the database in the operating method of the elevator monitoring system according to the first embodiment of the present invention.

The outline obtained from the actual captured video is displayed in frame 1 shown in FIG. 7, and the outline stored in the database is displayed in frame 2.

The passenger 1 may open the door 2 in various ways, but FIG. 7 illustrates a case in which the door 2 is opened from the inside to the outside by holding the door 2 with both arms.

The control device 50 may match the contours of the frame 1 and the frame 2 as a whole to determine the degree of similarity, and indicate the value as a matching rate.

For example, the shape of the contour 5 of the arm in the frame 1 and the shape of the contour 5 'of the arm in the frame 2 may be matched with each other to indicate a similar degree as a matching rate. More specifically, the angle at which the elbow portion is bent or the distance between two hands can be set as parameters, and the matching rate can be calculated by comparing the photographed value with the value stored in the database.

In this case, the specific method of calculating the parameter and the matching rate, which are criteria for determining the degree of similarity, can be changed or set as many as the designer intends.

5, the internal captured video analysis operation by the control device 50 is terminated (S136).

After analyzing the captured video inside the elevator cage 20, the control device 50 uses the analysis result to determine whether the operation of the passenger 1 corresponds to an emergency (S140).

For example, as a result of comparing the photographed data with the database, if the elbow angle or the distance between the two hands is within 10% of the error range, it may be determined as an emergency situation.

That is, if the matching rate is less than 90%, it is determined that the passenger 1 is not an operation for forcibly opening the door 2. In this case, the control device 50 returns to step S110 again to continue photographing inside the elevator cage 20.

On the other hand, if the matching rate is 90% or more, it is determined that the passenger 1 tries to forcibly open the door 2.

If it is determined that the passenger 1 tries to forcibly open the door, the control device 50 outputs a warning sound or a recorded warning broadcast inside the elevator cage 20 through the first warning device 40 ( S150).

The controller 50 continuously analyzes the captured video and counts the number of times each time the passenger 1 tries to forcibly open the door 2 (S160) and compares the reference value (S170).

If the passenger 1 no longer tries to forcibly open the door 2 after outputting the warning sound or the warning broadcast, the control device 50 does not take any further action since the emergency situation is resolved.

However, if the passenger 1 repeatedly attempts to open the door 2 by force, the warning sound or warning broadcast as described above is invalid.

The reference value of this judgment is set in advance as a reference value (normally, if the door is forcibly opened two or three times or more, it may be regarded as an emergency situation), and the passenger 1 may enter the door (2). ) Is considered an emergency if it tries to open more frequently than the reference value.

If it is determined that the situation inside the elevator cage 20 is an emergency, the control device 50 forcibly stops the elevator cage 20 to the nearest floor from the current hoistway 10 position (S180).

That is, the control device 50 drives the drive device 60 in an emergency situation and forcibly displays the elevator cage 20 on the nearest floor to solve the emergency situation.

When the elevator cage 20 is stopped on the nearest floor, the elevator monitoring system ends (S190).

8 is a flowchart illustrating an operation of an elevator monitoring system according to a second embodiment of the present invention, and FIG. 9 is a flowchart illustrating a method of operating an elevator monitoring system according to a second embodiment of the present invention.

The second embodiment of the present invention illustrates the case where the passenger 1 runs inside the elevator cage 20.

8 and 9, the elevator monitoring system according to a second embodiment of the present invention is started (S210).

The photographing apparatus 30 photographs the operation of the passenger 1 in the elevator cage 20 in real time (S220).

The control device 50 analyzes a video photographing the operation of the passenger 1 (S230).

The analysis process of the video is generally the same as in the first embodiment of the present invention described above. Hereinafter, a method of calculating a difference in outlines, which is a difference from the first embodiment, in a video analysis process will be described in detail.

10 illustrates a process of calculating a difference in contour lines in an operating method of an elevator monitoring system according to a second embodiment of the present invention.

Frame 1, frame 2, and frame 3 shown in FIG. 10 represent three frames that are taken continuously or at predetermined time intervals in the captured video.

In the image of Frame 1, the noise-free contours show that the passenger 1 is standing on the floor 3.

In the image of frame 2, when the noise-free contour is seen, the passenger 1 is running with his feet separated from the floor by the height H1 near the floor 3.

In the image of Frame 3, the noise-free contours were taken of the passengers 1 running with their feet off the floor at a height H2 higher than Frame 2 near the floor 3.

Comparing Frame 1 and Frame 2, it can be seen that the position of the contour of the passenger's two feet in the vicinity of the floor 3 is increased by the height H1.

Similarly, comparing Frame 2 and Frame 3, it can be seen that the position of the contour of the passenger's two feet near the bottom 3 is higher from height H1 to height H2.

The control device 50 compares the positional movement (bottom ⇒ H1 ⇒ H2) of the contour and calculates the difference.

9 again, after analyzing the captured video inside the elevator cage 20, the control device 50 uses the analysis result to determine whether the operation of the passenger 1 corresponds to the jumping operation (S240). .

The control device 50 determines whether the operation of the passenger 1 corresponds to the jumping operation by using the result of calculating the position difference of the contour by comparing the three frames.

The control device 50 calculates the moving speed of the passenger 1 from the time interval between the three frames and the value of the positional movement of the contour (bottom ⇒ H1 ⇒ H2). This value is then generally compared with the speed at which the passenger 1 moves inside the elevator cage 20.

For example, if the speed at which a passenger moves within an elevator cage is generally within 1 m / s, and the actual speed at which the passenger 1 moves is 0.3 m / s, it is within the normal range, so that the passenger 1 jumps. It is determined that the operation is not. In this case, the control device 50 returns to step S210 again to continue photographing inside the elevator cage 20.

On the other hand, in general, if the speed of the passenger moving within the elevator cage is less than 1m / s, the actual speed of the passenger (1) movement is 2m / s, which is outside the normal range, so that the passenger (1) is running To judge.

When it is determined that the passenger 1 has run, the control device 50 outputs a warning sound or a recorded warning broadcast inside the elevator cage 20 through the first warning device 40 (S250).

The control device 50 continuously analyzes the captured video and counts the number of times each time the passenger 1 jumps (S260) and compares it with the reference value (S270).

If the passenger 1 no longer runs after outputting the warning sound or the warning broadcast, the control device 50 does not take any further action since the emergency situation is resolved.

However, when the passenger 1 repeats the jumping operation, the above warning sound or warning broadcast is not valid.

The reference value for this judgment is set as the reference value in advance (typically, if the jumping operation is repeated two or three times or more, it may be regarded as an emergency situation), and the operation of the passenger (1) beating more frequently than the reference value. If repeated, it is considered an emergency.

If it is determined that the situation inside the elevator cage 20 is an emergency, the control device 50 forcibly stops the elevator cage 20 to the nearest floor from the current hoistway 10 position (S280).

That is, the control device 50 drives the drive device 60 in an emergency situation to force the elevator cage 20 to the nearest floor, thereby forcibly terminating the emergency situation.

When the elevator cage 20 is stopped on the nearest floor, the elevator monitoring system ends (S290).

1: passenger
2: door
3: near the bottom
10: hoistway
20: elevator cage
30: shooting device
40: first warning device
50: control unit
60: drive unit
70: second warning device
80: display device

Claims (14)

An elevator cage for elevating along a hoistway in a building;
An imaging device for photographing the inside of the elevator cage; And
And a control device for analyzing the captured video inside the elevator cage and controlling the elevator cage according to the result. The method according to claim 1,
The control device
A database storing a frame including a preset image,
Elevator monitoring system, characterized in that for determining the match by comparing each frame constituting the captured video and the frame stored in the database. The method according to claim 2,
And determining that the control device is matched, further comprising a first warning device capable of outputting a warning sound inside the elevator cage. The method according to claim 1,
The control device
Elevator monitoring system, characterized in that to recognize the difference in the position of the object inside the elevator cage by comparing the successive frames constituting the captured video. The method according to claim 4,
And a first warning device capable of outputting a warning sound inside the elevator cage when the control device recognizes that the position difference of the object exceeds a preset reference value. The method according to claim 3 or 5,
A second warning device capable of outputting a warning sound outside the elevator cage when the first warning device operates; And
And a display device capable of displaying the captured video outside the elevator cage. The method according to claim 3 or 5,
And when the first warning device is repeatedly operated N times (N is a natural number), driving the driving device to stop the elevator cage to the nearest floor. Photographing the interior of the elevator cage;
Analyzing a video taken inside the elevator cage; And
And controlling the elevator cage according to the analysis result of the photographing video. The method according to claim 8,
The analyzing step
Converting a plurality of frames constituting the captured video into a binary frame;
Extracting an outline from each of the plurality of frames;
Correcting the contour and removing noise; And
And calculating a matching rate by comparing each of the plurality of frames with a frame including a preset image stored in a database. The method according to claim 9,
The control step
And output a warning sound in the elevator cage when the matching ratio exceeds a preset reference value. The method according to claim 8,
The analyzing step
Converting a plurality of frames constituting the captured video into a binary frame;
Extracting an outline from each of the plurality of frames;
Correcting the contour and removing noise; And
And comparing the successive frames of the plurality of frames with each other to calculate a position difference of the contour. The method of claim 11,
The control step
And outputting a warning sound in the elevator cage when the position difference of the contour exceeds a preset reference value. The method according to claim 10 or 12,
The control step
And outputting a warning sound to the outside of the elevator cage when the warning sound is output to the inside of the elevator cage, and displaying the captured video on a display device outside the elevator cage. The method according to claim 10 or 12,
The control step
Elevator warning system operating method, characterized in that to stop the elevator cage to the nearest floor when the warning sound is repeatedly output M or more times (M is natural water) inside the elevator cage.

Images