JP5977932B2 - In-car state monitoring device, in-car state monitoring method and program - Google Patents

Description

The present invention is overlooked in state monitoring device, a car in a state monitoring method and program.

Several techniques have been proposed for capturing an image of a space separated by a door, such as an elevator car or an elevator hall, and analyzing the movement of a person or an object using the captured image.
For example, in the elevator system described in Patent Document 1, the thermal image detection means measures the temperature distribution of the elevator hall and outputs thermal image data. Based on the thermal image data, the position, movement and number of users in the elevator hall are detected. As a result, it is said that a human body in an elevator hall can be detected by a system using a relatively simple structure and low-cost thermal image detection means, and efficient operation control can be performed.

  In addition, the elevator door safety device described in Patent Document 2 is installed at the upper part of the entrance / exit frame, and a camera that images the vicinity of the entrance / exit including the door and the sill, and the presence / absence of foreign matter by processing the image obtained from the camera And a door opening / closing control device for controlling the opening / closing operation of the door using a foreign object detection signal of the image processing apparatus. A mark part that can recognize the operating position during opening and closing is placed on the front edge of the door, and the inside of the mark part that moves according to the opening and closing of the door is set as a foreign object detection region, so that the door itself is mistaken as a foreign object. It is said that there is no fear of detection.

  In addition, by imaging the inside of the elevator car and analyzing the picked-up image, it is possible to monitor the state in the car such as detecting a rampage behavior in the car.

JP 7-165375 A JP 2009-280362 A

When a space separated by a door is imaged and the movement of a person or an object is analyzed using the captured image, it may be possible that the person's movement differs depending on whether the door is open or closed. . In such a case, in order to improve the analysis accuracy, it is effective to reflect the state of the door (open state or closed state) in the analysis result.
For example, when detecting a rampage behavior in an elevator car, an increase in the amount of movement in the cage due to the entry or exit of a person when the door is open may be erroneously detected as a rampage behavior. As a method of preventing such erroneous detection, it is conceivable to suppress the detection of rampage behavior when the door is in an open state using information indicating whether the door of the elevator is in an open state or a closed state. .

  Here, it is conceivable that detection of rampage behavior is suppressed when the door is in an open state by acquiring a signal indicating whether the door of the elevator is in an open state or a closed state from the elevator. However, it is necessary to add a modification for outputting the signal to an elevator (for example, an elevator control panel), which is expensive.

The present invention has been made in view of such circumstances, and its purpose is to determine whether the door is open or closed without requiring a signal indicating whether the door is open or closed. detectable overlooked in the state monitor whether a state is to provide a cage in a state monitoring method and program.

The present invention has been made to solve the above-described problems, and the in-car state monitoring device according to one aspect of the present invention has a fixed imaging range corresponding to a predetermined portion of the door when the elevator door is closed. The door is in an open state or a closed state based on a captured image acquisition unit that acquires a captured image in a certain determination target range, and brightness of the captured image in the determination target range acquired by the captured image acquisition unit. and determining closing judging unit or, if the door is judged that the closing judging unit to be in a closed state, based on the captured image in the elevator car to the captured image acquisition unit acquires the elevator car An in-car state determination unit that calculates the amount of movement of a person or thing in the car and determines the state of the person or thing in the car in the elevator based on the amount of movement. The state determination unit counts up the accumulated time that the operation amount is determined to be equal to or greater than the detection operation amount threshold, and the opening / closing determination unit determines that the door is in the open state, and the operation amount is If at least contiguous time satisfying any of the case where it is judged less than the detection operation amount threshold is determined to be equal to or above the reset time threshold, resetting the accumulated time to 0, the accumulated time for detection When it is determined that the time threshold is exceeded, a rampage detection signal indicating that a ramping operation state is detected is output.

Further, the in- car state monitoring device according to one aspect of the present invention is the above-described in- car state monitoring device , wherein the predetermined portion of the door is acquired by the captured image acquisition unit in the closed state of the door. The brightness of the captured image in the determination target range has a brightness that is darker than the predetermined brightness, and the open / close determination unit has a brightness of the captured image in the determination target range acquired by the captured image acquisition unit. When it is brighter than the brightness, it is determined that the door is in an open state, and the brightness of the captured image in the determination target range acquired by the captured image acquisition unit is darker than the predetermined brightness, the door Is determined to be in a closed state.

Moreover, the in- car state monitoring apparatus according to one aspect of the present invention is the above-described in- car state monitoring apparatus , wherein the door is a door of a penetrating elevator.

Further, the in- car state monitoring apparatus according to one aspect of the present invention is the above-described in-car state monitoring apparatus, wherein the elevator includes a plurality of doors, and the captured image acquisition unit is configured for each of the plurality of doors. The captured image of the determination target range that is a fixed imaging range corresponding to a predetermined portion of the door in the closed state of the door is acquired, and the open / close determination unit is configured to close the door for each of the plurality of doors. Whether the door is in an open state or a closed state is determined based on the brightness of a captured image in the determination target range corresponding to a predetermined portion of the door in the state.

Further, the in- car state monitoring device according to one aspect of the present invention is the above-described in- car state monitoring device , wherein the captured image acquisition unit acquires the predetermined portion of the door in a closed state of the door. A sheet having a brightness that makes the brightness of the captured image in the determination target range darker than the predetermined brightness is pasted.

An in-car state monitoring method according to an aspect of the present invention is an in-car state monitoring method for an in-car state monitoring device that monitors an in-car state of an elevator, wherein the door is closed when the elevator door is closed. Based on the captured image acquisition step of acquiring a captured image of a determination target range that is a fixed imaging range corresponding to a predetermined portion, and the brightness of the captured image of the determination target range acquired in the captured image acquisition step, and determining closing determination step whether the door is in the closed state or the open state, when the door is determined by the on-off determination step and in the closed state, the elevator car acquired by the captured image acquisition step The movement amount of a person or an object in the elevator car is calculated based on the captured image, and the inside of the elevator car is calculated based on the movement amount. An in-car state determination step for determining the state of a person or an object in the car, and in the in-car state determination step, the cumulative time when the operation amount is determined to be equal to or greater than the detection operation amount threshold is counted up, If the door is determined by the on-off determination step and in the open position, and, at least contiguous time or reset time threshold that satisfies any one of the case where the operation amount is determined to be less than the detection operation amount threshold If it is determined that the accumulated time is reset to 0, and if it is determined that the accumulated time is greater than or equal to the detection time threshold, a rampage detection signal indicating that a rampage operation state has been detected is output. And

Further, a program according to an aspect of the present invention provides a computer that controls an in-car state monitoring device that monitors an in-car state of an elevator to a fixed unit corresponding to a predetermined part of the door in the closed state of the door of the elevator. Whether the door is open based on a captured image acquisition step of acquiring a captured image of a determination target range that is an imaging range and the brightness of the captured image of the determination target range acquired in the captured image acquisition step and closing determination step of determining whether the closed state, the door based on the captured image when the determination is made in closing judging step to be in the closed state, the basket of the elevator obtained by the captured image acquisition step, The amount of movement of a person or thing in the elevator car is calculated, and the person in the car in the elevator is calculated based on the movement amount. And an in-car state determination step for determining the state of the object. In the in-car state determination step, the accumulated time when the operation amount is determined to be equal to or greater than the detection operation amount threshold is counted up, and the door in If it is determined in the closing determination step to be in the open state, and the operation amount is at least continuous time satisfying any of the case where it is judged less than the detection operation amount threshold or more reset time threshold If it is determined that there is a reset, the accumulated time is reset to 0, and if it is determined that the accumulated time is equal to or greater than the detection time threshold value, a rampage detection signal indicating that a rampage operation state has been detected is output. It is a program.

  According to the present invention, it is possible to detect whether the door is open or closed without requiring a signal indicating whether the door is open or closed.

It is a schematic block diagram which shows the function structure of the door opening / closing determination apparatus in one Embodiment of this invention. It is a schematic block diagram which shows the function structure of the in-car condition monitoring apparatus in the embodiment. It is a schematic block diagram which shows the apparatus structure of the elevator system which comprises the cage | basket | car state monitoring apparatus in the embodiment. It is a front view which shows the outline of the shape which looked at the front door in the embodiment from the inner side of the cage. It is a front view which shows the outline of the shape which looked at the rear door in the embodiment from the inner side of the cage. In the same embodiment, it is a figure which shows the example of the captured image by an imaging device in the state in which the sheet | seat is not stuck on the door. In the same embodiment, it is a figure which shows the example of the captured image by the imaging device in the state in which the sheet | seat was stuck on the door and the front door and the rear door were closed. It is a figure which shows the example of the captured image by an imaging device in the state in which the sheet | seat was stuck on the door in the same embodiment, the front door closed, and the rear door opened. In the same embodiment, it is a flowchart which shows the process sequence in which an opening / closing determination part performs door opening / closing determination. In the same embodiment, it is a flowchart which shows the process sequence in which an opening / closing determination part performs opening / closing determination about each of a front door or a rear door. It is a graph which shows the example of the rampage operation state detection by the in-car state monitoring apparatus in the embodiment. In the same embodiment, it is a flowchart which shows the process sequence in which the in-car condition monitoring apparatus detects a rampage operation state.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a schematic block diagram showing a functional configuration of a door open / close determining device according to an embodiment of the present invention. In the figure, the door opening / closing determination device 10 includes a captured image acquisition unit 110 and an opening / closing determination unit 120.
The door open / close determination device 10 determines whether the door is in an open state or a closed state (hereinafter referred to as “door open / close determination” or “open / close determination”) based on a captured image of the door.

The captured image acquisition unit 110 acquires a captured image in the determination target range. The determination target range here is a fixed imaging range corresponding to a predetermined portion of the door in a closed state of a door (hereinafter referred to as “target door”) that is a target of door opening / closing determination.
For example, the captured image acquisition unit 110 acquires a captured image in which a camera installed in the vicinity of the entrance / exit where the target door is provided captures the entrance / exit with the imaging direction fixed and the field angle fixed. A predetermined range of the captured image is set in advance as a determination target range. More specifically, the determination target range is set so as to include an image of a predetermined portion of the target door in a state where the target door is closed.
The predetermined part of the target door here may be an arbitrary part of the symmetric door, but is preferably set at a relatively upper part of the target door. This is to prevent the camera from failing to capture a predetermined part due to being blocked by a person entering / exiting from the entrance / exit.

The open / close determination unit 120 determines whether the target door is in an open state or a closed state based on the brightness of the captured image in the determination target range acquired by the captured image acquisition unit 110 (performs door open / close determination). .
For example, the open / close determination unit 120 extracts the luminance value of each pixel included in the determination target range from the captured image acquired by the captured image acquisition unit 110, and calculates the average value of the extracted luminance values as the captured image of the determination target range. Calculated as the brightness of. Then, the opening / closing determination unit 120 performs door opening / closing determination by comparing the calculated average value with a predetermined threshold. The details of the door opening / closing determination will be described later.

Next, with reference to FIGS. 2 to 12, an embodiment of the present invention will be described in more detail by taking as an example the case where the present invention is applied to an in-car state monitoring apparatus.
FIG. 2 is a schematic block diagram illustrating a functional configuration of the in-car state monitoring apparatus according to the present embodiment. In the figure, the in-car state monitoring apparatus 100 includes a captured image acquisition unit 110, an open / close determination unit 120, an in-car state determination unit 130, an audio signal output unit 140, and a determination result transmission unit 150. The in-car state determination unit 130 is connected to an imaging device 610 installed in the car 500. The audio signal output unit 140 is connected to a speaker 620 installed in the basket 500. Further, the basket 500 includes a front door 510, a rear door 520, and an operation input panel 530.

  The basket 500 is a structure for loading a person (elevator user) or a load, which is provided in an elevator (elevator). This basket 500 is a basket of a so-called penetration type elevator (an elevator having an entrance in two opposite directions) installed in a station, and has two doors, a front door 510 and a rear door 520.

  The imaging device 610 is a surveillance camera (ITV (Industrial Television) camera) installed on the ceiling of the cage 500. The inside of the cage 500 is always imaged with the imaging direction fixed and the field angle fixed, and the captured image is captured. The data is output to the acquisition unit 110. The image captured by the imaging device 610 includes an image of the front door 510 when the front door 510 is closed, and includes an image of the rear door 520 when the rear door 520 is closed.

  The imaging range of the imaging device 610 includes a determination target range for the front door 510 (front door determination target range A11 described later in FIG. 7) and a determination target range for the rear door 520 (rear door determination target described later in FIG. 7). Range A12) is preset. Then, in the closed state of the front door 510, a predetermined portion of the front door 510 is included in the determination target range for the front door 510 and imaged. Similarly, in a closed state of the rear door 520, a predetermined portion of the rear door 520 is captured within the determination target range for the rear door 520.

  When the in-car condition monitoring device 100 is installed in an existing elevator, the imaging device 610 may be an existing monitoring camera or newly installed when the in-car condition monitoring device 100 is installed. May be.

  The front door 510 and the rear door 520 are examples of target doors in the present invention. The front door 510 and the rear door 520 open on different floors. For example, the front door 510 opens on the home floor and the rear door 520 opens on the ticket gate floor.

  Front door 510 includes a predetermined portion. The predetermined portion is imaged by being included in the determination target range for the front door 510 set in the imaging range of the imaging device 610 in the closed state of the front door 510. The predetermined portion is set in the determination target range of the determination target range with respect to the front door 510 acquired by the captured image acquisition unit 110 in the closed state of the front door 510 (of the captured image by the imaging device 610). The brightness of the portion) has a brightness that is darker than the predetermined brightness. Specifically, in a predetermined portion of the front door 510, the brightness of the captured image in the determination target range with respect to the front door 510 acquired by the captured image acquisition unit 110 in the closed state of the front door 510 is greater than the predetermined brightness. A sheet having a brightness that becomes darker is also pasted.

  Similarly, the rear door 520 includes a predetermined portion. The predetermined portion is imaged by being included in the determination target range for the rear door 520 set in the imaging range of the imaging device 610 in the closed state of the rear door 520. And this predetermined part is set to the said determination target range among the captured images of the determination target range with respect to the rear door 520 which the captured image acquisition part 110 acquires in the closed state of the rear door 520. The brightness of the portion) has a brightness that is darker than the predetermined brightness. Specifically, in a predetermined portion of the rear door 520, the brightness of the captured image in the determination target range with respect to the rear door 520 acquired by the captured image acquisition unit 110 in the closed state of the rear door 520 is greater than the predetermined brightness. A sheet having a brightness that becomes darker is also pasted.

The operation input board 530 has various push buttons such as a push button for specifying a destination floor and a push button for instructing opening of a door, and receives an input operation.
The speaker 620 is installed on the ceiling of the cage 500 and outputs sound according to the sound signal output from the sound signal output unit 140 as an electric signal.
When the in-car condition monitoring apparatus 100 is installed in the existing elevator 400, the speaker 620 may be an existing speaker or newly installed when the in-car condition monitoring apparatus 100 is installed. Also good.

  The in-car state monitoring device 100 is an example of a door opening / closing determination device (the door opening / closing determination device 10 in FIG. 1) in the present invention, and whether each of the plurality of doors (the front door 510 and the rear door 520) is in an open state. Determine if it is in the closed state. That is, the in-car state monitoring apparatus 100 performs door opening / closing determination for each of the front door 510 and the rear door 520.

  Then, the in-car state monitoring apparatus 100 monitors the state in the car 500 using the door opening / closing determination result. Specifically, the in-car state monitoring apparatus 100 detects a caution state in the car 500 (determines whether there is a caution state). The caution state here is a state other than a state normally found in the elevator car (for example, a state where the door is opened / closed or the car stays in the car when the car is lifted / lowered). It is. The in-car state monitoring apparatus 100 determines the presence or absence of a rampage operation state in the car 500 as a state of caution. Here, the rampage operation is an operation that continuously moves the body greatly, such as swinging an arm or raising a leg. The rampage operation state is a state in which a rampage operation is performed. This rampage operation is likely to be annoying to others (other users) in the basket 500. Therefore, when the in-car state monitoring apparatus 100 determines that the state is in a violent operation state (that is, when the violent operation is detected), it outputs a message voice requesting to stop the violent operation to the speaker 620, and uses FIG. As will be described later, information indicating that a violent action has been detected is displayed on the monitor in the station office.

  The captured image acquisition unit 110 acquires a captured image in the determination target range as described with reference to FIG. More specifically, the captured image acquisition unit 110 acquires captured images of the determination target range for each of the plurality of doors (front door 510 and rear door 520) of the elevator.

  As described with reference to FIG. 1, the open / close determination unit 120 determines whether the target door is open or closed based on the brightness of the captured image in the determination target range acquired by the captured image acquisition unit 110. (Does a door open / close judgment). More specifically, the open / close determination unit 120 is configured to detect, for each of the plurality of doors (the front door 510 and the rear door 520), a captured image of a determination target range corresponding to a predetermined portion of the door when the door is closed. Based on the brightness, it is determined whether the door is open or closed.

More specifically, the open / close determination unit 120 determines that the front door 510 is acquired when the brightness of the captured image in the determination target range with respect to the front door 510 acquired by the captured image acquisition unit 110 is brighter than a predetermined brightness. Determined to be in the open state. On the other hand, the open / close determination unit 120 indicates that the front door 510 is in the closed state when the brightness of the captured image in the determination target range with respect to the front door 510 acquired by the captured image acquisition unit 110 is darker than the predetermined brightness. judge.
Similarly, the open / close determination unit 120 opens the rear door 520 when the brightness of the captured image in the determination target range for the rear door 520 acquired by the captured image acquisition unit 110 is brighter than a predetermined brightness. Judge that there is. On the other hand, when the brightness of the captured image in the determination target range for the rear door 520 acquired by the captured image acquisition unit 110 is darker than the predetermined brightness, the open / close determination unit 120 determines that the rear door 520 is in the closed state. judge.

When the open / close determination unit 120 determines that the front door 510 and the rear door 520 are in the closed state, the in-car state determination unit 130 is based on the captured image in the basket 500 acquired by the captured image acquisition unit 110. The amount of movement of a person or thing in 500 is calculated, and the presence or absence of a state of caution in the basket 500 is determined based on the amount of movement. The movement amount here is an index that quantitatively indicates the movement of a person or an object in a predetermined space such as the inside of the basket 500. The in-car state determination unit 130 is the magnitude of change in the pixel value of each pixel (absolute value of change amount) in the captured image acquired by the captured image acquisition unit 110 (captured image in the cage 500 captured by the imaging device 610). Is calculated, the magnitude of the calculated change is summed for all the pixels of the captured image acquired by the captured image acquisition unit 110, and the obtained value is used as the operation amount.
In the present embodiment, the in-car state determination unit 130 determines the presence / absence of a violent operation state in the car 500 as the presence / absence of the attention state in the car 500. Details of the determination performed by the in-car state determination unit 130 will be described later.

  The audio signal output unit 140 causes the speaker 620 to output audio by outputting an audio signal to the speaker 620. In particular, when the in-car state determination unit 130 detects a ramping operation state, the voice signal output unit 140 outputs a voice signal of a message requesting to stop the ramping operation to the speaker 620 to output the message voice.

FIG. 3 is a schematic configuration diagram illustrating a device configuration of the elevator system 1 including the in-car state monitoring device 100. In the figure, the elevator system 1 includes an elevator 400, an ITV monitor 710 disposed in the station service room 700, an elevator monitoring monitor 720, and a recording device 730. The elevator 400 includes a signal transmission / reception panel 420 and a basket 500. The basket 500 includes a front door 510, a rear door 520, and an operation input panel 530. In addition, the cage 500 is provided with an in-car state monitoring device 100, an imaging device BOX 410, an imaging device 610, and a speaker 620.
In the figure, the same reference numerals (100, 500, 510, 520, 530, 610, 620) are assigned to the same parts as those in FIG.

The elevator 400 is a through-type elevator installed in the station, and loads people and luggage on the basket 500 described with reference to FIG. 2 to transfer between the home floor and the ticket gate floor.
The signal transmission / reception panel 420 transmits various signals for monitoring the elevator 400 to the outside of the elevator 400 and receives a control signal for the elevator 400 transmitted from the outside of the elevator 400. In particular, when the in-car state monitoring apparatus 100 (in-car state determination unit 130) determines that there is a ramping operation, the signal transmitting / receiving board 420 transmits a signal indicating that the ramping operation state has been detected to the elevator monitoring monitor 720.
The imaging apparatus BOX 410 converts the captured image signal output from the imaging apparatus 610 into an image signal for transmission such as MPEG (Moving Picture Experts Group), and outputs the image signal to the ITV monitor 710 and the recording device 730.

The station service room 700 is a place for station staff to perform station services including monitoring of the elevator 400.
The ITV monitor 710 displays an image captured by the imaging device 610.
The elevator monitoring monitor 720 displays the monitor information of the elevator 400. In particular, when the in-car state monitoring device 100 (in-car state determination unit 130) determines that there is a ramping operation, the elevator monitoring monitor 720 displays information indicating that the ramping operation state has been detected.
The recording device 730 records an image captured by the imaging device 610.

Next, the brightness of the door will be described with reference to FIGS. 4 and 5.
FIG. 4 is a front view schematically showing the shape of the front door 510 viewed from the inside of the cage 500 in a state where the front door 510 is closed. In the figure, the front door 510 includes a front left door 511, a front right door 512, a front left door seat 513, and a front right door seat 514.
The front left door 511 and the front right door 512 are doors that open to the left and right as viewed from the inside of the car 500 on the home floor, respectively.
The front left door sheet 513 and the front right door sheet 514 are sheets attached to the front left door 511 and the front right door 512, respectively.

Here, the front left door 511 and the front right door 512 are colored with a whitish color and have relatively bright brightness. For this reason, in the image captured by the imaging device 610, the front door 510 (the front left door 511 and the front right door 512) is captured relatively brightly.
The home floor is provided with brighter illumination than the interior of the elevator 400 (the basket 500). For this reason, in the captured image by the imaging device 610 in the state where the front door 510 is opened (the front left door 511 and the front right door 512 are opened), an image outside the elevator 400 is also captured relatively brightly.

For this reason, the difference in brightness (pixel value) in the image captured by the imaging device 610 between the closed state and the open state of the front door 510 is small, and the open / close determination unit 120 may not be able to accurately perform the door open / close determination. There is.
Therefore, the brightness of the front door 510 is made dark (for example, a blackish sheet (front left door sheet 513 or front right door sheet 514) is pasted on the front door 510 (front left door 511 or front right door 512)). . Thereby, the brightness difference in the image captured by the imaging device 610 between the closed state and the opened state of the front door 510 can be increased, and the open / close determination unit 120 can perform the door open / close determination more accurately.

Here, when the front door 510 is darkened, as shown in FIG. 4, only a part of the front door 510 is darkened (for example, the front left door sheet 513 and the front right door sheet 514 are pasted), The inside of the cage 500 can be made brighter than when the entire door 510 is darkened.
Also, as shown in FIG. 4, by darkening the upper part of the front door 510, it is possible to reduce the possibility that the imaging device 610 may not be able to image the dark part due to being blocked by a person or luggage in the basket 500. . Thereby, the accuracy of the door open / close determination of the open / close determination unit 120 can be improved.

FIG. 5 is a front view showing an outline of the shape of the rear door 520 viewed from the inside of the cage 500 in a state where the rear door 520 is closed. In the drawing, the rear door 520 includes a rear left door 521, a rear right door 522, a rear left door seat 523, and a rear right door seat 524.
The rear left door 521 and the rear right door 522 are doors that open to the left and right as viewed from the inside of the car 500 on the ticket gate floor, respectively.
The rear left door sheet 523 and the rear right door sheet 524 are sheets attached to the rear left door 521 and the rear right door 522, respectively.

As in the case of the front door 510 described with reference to FIG. 4, the rear left door 521 and the rear right door 522 are colored with a whitish color and have relatively bright brightness. For this reason, in the captured image by the imaging device 610, the rear door 520 (the rear left door 521 and the rear right door 522) is captured relatively brightly.
The ticket gate floor is provided with brighter illumination than the interior of the elevator 400 (the basket 500). For this reason, in the captured image by the imaging device 610 in a state where the rear door 520 is opened (a state where the rear left door 521 and the rear right door 522 are opened), an image outside the elevator 400 is also captured relatively brightly.

For this reason, the difference in the brightness in the image captured by the imaging device 610 between the closed state and the opened state of the rear door 520 is small, and the open / close determination unit 120 may not be able to accurately perform the door open / close determination.
Therefore, the brightness of the rear door 520 is reduced, for example, by sticking a blackish sheet (rear left door sheet 523 or rear right door sheet 524) to the rear door 520 (rear left door 521 or rear right door 522). Thereby, the difference in brightness in the image captured by the imaging device 610 between the closed state and the opened state of the rear door 520 is increased, and the opening / closing determination unit 120 can perform the door opening / closing determination more accurately.

Here, when the rear door 520 is darkened, as shown in FIG. 5, only a part of the rear door 520 is darkened (for example, the rear left door sheet 523 and the rear right door sheet 524 are pasted), The inside of the cage 500 can be made brighter than when the entire door 520 is darkened.
Further, as shown in FIG. 5, by darkening the upper portion of the rear door 520, it is possible to reduce the possibility that the imaging device 610 cannot capture an image of the dark part due to being blocked by a person or luggage in the basket 500. . Thereby, the accuracy of the door open / close determination of the open / close determination unit 120 can be improved.

  In addition, as a sheet (for example, the front left door sheet 513, the front right door sheet 514, the rear left door sheet 523, and the rear right door sheet 524) to be attached to the door, various colors having dark lightness are available. A sheet (for example, a sheet of black (black), ebony (dark brown), Prussian blue (dark amber), or the like) can be used. By using a sheet according to the color of the door or the color of the wall in the station, it is possible to improve the accuracy of the door open / close determination of the open / close determination unit 120 without deteriorating the beauty.

Next, the brightness of the captured image in the determination target range will be described with reference to FIGS.
FIG. 6 is a diagram illustrating an example of an image captured by the imaging device 610 in a state where no sheet is attached to the door. In the figure, the captured image in the basket 500 captured by the imaging device 610 includes an image of a front door 510 (front left door 511 and front right door 512) and a rear door 520 (rear left door 521 and rear right door 522). ) And the image of the operation input board 530 are included.
The front door 510 and the rear door 520 are imaged relatively brightly in the state shown in FIG.

  FIG. 7 is a diagram illustrating an example of an image captured by the imaging device 610 in a state where a sheet is attached to the door and the front door 510 and the rear door 520 are closed. In this figure, the same reference numerals (500, 510, 511, 512, 520, 521, 522, 530) are assigned to the same parts as those in FIG. In the captured image shown in FIG. 7, in addition to each part of the captured image shown in FIG. 6, the image of the front right door sheet 514 attached to the front right door 512 and the rear left door attached to the rear left door 521. An image of the sheet 523 and an image of the rear right door sheet 524 attached to the rear right door 522 are included.

In addition, a front door determination target range A11 and a rear door determination target range A12 are set in the captured image by the imaging device 610. The front door determination target range A11 includes a part of the image of the front right door seat 514 when the front door 510 is closed. The rear door determination target range A12 includes a part of the image of the rear left door seat 523 when the rear door 520 is closed.
Since the front right door sheet 514 is attached to the front right door 512, the image of the front door determination target range A11 is relatively dark. Similarly, the rear left door sheet 523 is attached to the rear right door 522, so that the image of the rear door determination target range A12 is relatively dark.

FIG. 8 is a diagram illustrating an example of an image captured by the imaging device 610 in a state where a sheet is attached to the door, the front door 510 is closed, and the rear door 520 is opened. In this figure, the same reference numerals (500, 510, 511, 512, 514, 530, A11, A12) are assigned to the same parts as those in FIG.
In the captured image illustrated in FIG. 8, the rear door 520 is in an open state, so that the captured image in the rear door determination target range A <b> 12 is captured brighter than in the captured image illustrated in FIG. 7.
Here, because the rear left door sheet 523 is attached to the rear left door 521, the difference in brightness of the rear door determination target range A12 between the case of FIG. 7 and the case of FIG. This is larger than the difference in brightness between the portion and the rear door determination target range A12 in FIG. Thereby, the accuracy of the open / close determination of the rear door 520 performed by the open / close determination unit 120 can be improved.

Next, the operation of the in-car state monitoring apparatus 100 will be described with reference to FIGS. First, the door opening / closing determination performed by the opening / closing determination unit 120 will be described with reference to FIGS. 9 and 10.
FIG. 9 is a flowchart illustrating a processing procedure in which the opening / closing determination unit 120 performs door opening / closing determination. The open / close determination unit 120 periodically performs the process shown in FIG. More specifically, the open / close determination unit 120 performs the process of FIG. 12 in step S304 of FIG.

In the process of FIG. 9, the opening / closing determination unit 120 first determines whether the front door 510 is open or closed (step S101). Details of the opening / closing determination of the front door 510 will be described later with reference to FIG.
Next, the open / close determination unit 120 performs branching based on the determination result in step S101 (step S102). When it is determined that the front door 510 is in the closed state (step S102: YES), the opening / closing determination unit 120 determines whether the rear door 520 is opened or closed (step S111). Details of the opening / closing determination of the rear door 520 will be described later with reference to FIG.

Next, the open / close determination unit 120 performs branching based on the determination result in step S111 (step S112). When it is determined that the rear door 520 is in the closed state (step S112: YES), the open / close determination unit 120 sets the determination result of the door open / close determination to the closed state (step S121). That is, the opening / closing determination unit 120 determines that both the front door 510 and the rear door 520 are in the closed state.
Thereafter, the process of FIG.

On the other hand, when it is determined in step S102 that the front door 510 is in the open state (step S102: NO) and in step S112, it is determined that the rear door 520 is in the open state (step S112: NO). The opening / closing determination unit 120 sets the door opening / closing determination result to the open state (step S131). That is, the opening / closing determination unit 120 determines that either the front door 510 or the rear door 520 is in the open state.
Thereafter, the process of FIG.

  FIG. 10 is a flowchart illustrating a processing procedure in which the opening / closing determination unit 120 performs opening / closing determination for each of the front door 510 and the rear door 520. The opening / closing determination unit 120 performs the process of FIG. 10 for the front door 510 in step S102 of FIG. 9, and performs the process of FIG. 10 for the rear door 520 in step S111.

In the process of FIG. 10, the open / close determination unit 120 first calculates the average luminance value of the determination target range among the captured images captured by the imaging device 610 and acquired by the captured image acquisition unit 110 (step S201).
More specifically, in the opening / closing determination of the front door 510, the opening / closing determination unit 120 calculates the average luminance value of the front door determination target range A11 described with reference to FIGS. Moreover, the opening / closing determination unit 120 calculates the average luminance value of the rear door determination target range A <b> 12 described with reference to FIGS. 7 and 8 in the opening / closing determination of the rear door 520. For example, the pixel value of each pixel in the image captured by the imaging device 610 is set so as to indicate a larger pixel value as the pixel is brighter, and the open / close determination unit 120 calculates the average of the pixel values as the average luminance value.

  Next, the open / close determination unit 120 determines whether or not the average luminance value calculated in step S201 is a value indicating that it is brighter than a luminance threshold stored in advance (before starting the open / close determination) (step S202). For example, the open / close determination unit 120 determines whether or not the average of the pixel values calculated as the average luminance value in step S201 is greater than or equal to the pixel value stored in advance as the luminance threshold.

Note that the open / close determination unit 120 may store a threshold value common to the front door 510 and the rear door 520, or may store an individual threshold value for each. For example, when the front door 510 and the rear door 520 are different in the brightness of the attached sheets, or when the illuminance of the sheet is different depending on the lighting condition, the open / close determination unit 120 is connected to the front door 510 and the rear door 520. By storing an individual threshold value and performing opening / closing determination, the opening / closing determination can be performed more accurately.
Further, when the brightness of the outside of the elevator 400 is different between the case where the front door 510 is in the open state and the case where the rear door 520 is in the open state, such as different lighting used on the home floor and the ticket gate floor. In addition, the open / close determination unit 120 can perform the open / close determination more accurately by storing the individual threshold values in the front door 510 and the rear door 520 and performing the open / close determination.
On the other hand, the opening / closing determination unit 120 stores a common threshold value for the front door 510 and the rear door 520, thereby reducing the required storage capacity.

When it is determined in step S202 that the average luminance value is a value indicating that the average luminance value is brighter than the luminance threshold value (step S202: YES), the open / close determination unit 120 sets the open / close determination result of the determination target door to the open state ( Step S211).
Thereafter, the process of FIG.
On the other hand, when it is determined in step S202 that the average luminance value is a value indicating that the average luminance value is darker than the luminance threshold (step S202: NO), the open / close determination unit 120 sets the determination result of the determination target door to be in the closed state. (Step S221).
Thereafter, the process of FIG.

Next, with reference to FIG. 10 and FIG. 11, the detection of the rampage operation state performed by the in-car state monitoring apparatus 100 will be described.
FIG. 11 is a graph illustrating an example of the detection of the violent operation state by the in-car state monitoring apparatus 100 (in-car state determination unit 130). A line L <b> 11 in FIG. 10A indicates the result of the door opening / closing determination by the opening / closing determination unit 120. A line L12 in FIG. 5B indicates the amount of motion calculated by the in-car state determination unit 130. The threshold value h11 (hereinafter referred to as “detection operation amount threshold value” h11) in FIG. 5B is an operation amount threshold value for detecting the abnormal operation state (that is, detecting the abnormal operation). Hereinafter, an operation amount that is equal to or greater than the detection operation amount threshold value h11 is referred to as a “probable movement amount”.

A line L13 in FIG. 6C shows a detection accumulated time which is an accumulated time when the door opening / closing determination result is in the closed state and the in-car state determining unit 130 detects (calculates) the suspicious operation amount. Show. The threshold value h12 (hereinafter referred to as “detection time threshold value” h12) in FIG. The threshold value h13 (hereinafter referred to as “reset time threshold value” h13) in FIG. 8C is a threshold value indicating a reference time for the in-car state determination unit 130 to reset the detection accumulated time.
A line L <b> 14 in FIG. 4D indicates the determination result of whether or not a ramping operation is performed by the in-car state determination unit 130.

As shown in FIG. 5C, the in-car state determination unit 130 measures the accumulated time (detected accumulated time) when the door open / closed determination result is the closed state and the suspicious movement amount is detected. .
Here, when the door opening / closing determination result is in the open state (when the front door 510 or the rear door 520 is open), the amount of motion calculated by the in-car state determination unit 130 increases due to the passenger getting on and off the elevator. Can be considered.
Therefore, the in-car state determination unit 130 prevents erroneous detection of detecting an elevator user's getting on and off as a rampage operation by excluding the case where the door opening / closing determination result is in the open state from the measurement target of the detection cumulative time. Yes.

In addition, when the elevator user performs a single action such as when the elevator user changes his / her standing position or moves a load in the car 500, the in-car state determination unit 130 may detect the amount of suspicious motion. That is, an operation amount equal to or greater than the detection operation amount threshold value h11 can be detected. Such a single operation is not necessarily annoying to others. If the speaker 620 outputs a warning message for the operation, the elevator user may be uncomfortable.
Therefore, the in-car state determination unit 130 detects a ramping operation based on an accumulated time (detected accumulated time in the present embodiment) instead of a single motion amount (for example, a suspicious motion amount). The detection of motion is suppressed.

In addition, if the target time for which the in-car state determination unit 130 measures the detection accumulation time is long, the in-car state determination unit 130 may detect a rampage operation based on the accumulation time of a single operation. In this case, the in-car state determination unit 130 detects a single operation as a rampage operation. Similarly to the above, if the speaker 620 outputs a warning message for the single operation, the elevator user may be uncomfortable.
Therefore, the in-car state determination unit 130 sets the detection accumulated time to 0 (zero) when the continuous time during which the violated suspicious motion amount is not detected (hereinafter referred to as “non-detection continuous time”) is equal to or greater than the reset time threshold h13. Reset) suppresses the detection of a single operation.

FIG. 12 is a flowchart illustrating a processing procedure in which the in-car state monitoring apparatus 100 detects a violent operation state. The in-car state monitoring device 100 starts the process of FIG. 3 when the in-car state monitoring device 100 is powered on and activated.
In the process of the figure, first, the in-car state determination unit 130 sets the accumulated detection time to 0 (step S301). Further, the in-car state determination unit 130 sets the non-detection continuous time to 0 (step S302).

  Next, the captured image acquisition unit 110 acquires the captured image output from the imaging device 610, and outputs the captured image to the open / close determination unit 120 and the in-car state determination unit 130 (step S303). Then, the opening / closing determination unit 120 performs the door opening / closing determination described in FIG. 9 based on the captured image output from the captured image acquisition unit 110, and outputs the determination result to the in-car state determination unit 130 (step S304). .

  Then, the in-car state determination unit 130 branches based on the determination result output from the open / close determination unit 120 (step S305). When the determination result is the closed state (step S305: YES), the in-car state determination unit 130 calculates the movement amount of a person or an object in the car 500 based on the captured image output from the captured image acquisition unit 110. (Step S311).

Then, the in-car state determination unit 130 determines whether or not the calculated operation amount is equal to or greater than the detection operation amount threshold (step S312). When it determines with it being more than the detection operation amount threshold value (step S312: YES), the in-car state determination unit 130 counts up the accumulated detection time (step S321). For example, the opening / closing determination unit 120 performs door opening / closing determination at regular time intervals, and the in-car state determination unit 130 counts up the detection accumulated time by adding the cycle time to the detection accumulated time.
Further, the in-car state determination unit 130 sets the non-detection continuous time to 0 (step S322).

  Next, the in-car state determination unit 130 determines whether or not the accumulated detection time is greater than or equal to the detection time threshold (step S323). When it is determined that the detection time threshold is exceeded (step S323: YES), the in-car state determination unit 130 outputs a ramp detection signal indicating that the ramp operation state has been detected to the determination result transmission unit 150, and the determination result The transmission unit 150 transmits the ramp detection signal to the elevator monitoring monitor 720 via the signal transmission / reception panel 420 (FIG. 3) (step S331). Then, the elevator monitoring monitor 720 displays a message indicating that a violent operation state has been detected.

Further, the in-car state determination unit 130 outputs a ramp detection signal to the audio signal output unit 140, and the audio signal output unit 140 causes the speaker 620 to output a message voice requesting to stop the ramping operation (step S332).
Thereafter, the in-car state monitoring apparatus 100 waits for the elapse of a predetermined time set as a cycle time for the door opening / closing determination unit 120 to perform door opening / closing determination (step S333), and returns to step S303.

  On the other hand, when the door opening / closing determination result is in the open state in step S305 (step S305: NO), and when it is determined in step S312 that the operation amount is less than the detection operation amount threshold (step S312: NO). The in-car state determination unit 130 counts up the non-detection continuous time (step S341). For example, similarly to the count-up of the accumulated detection time described in step S321, the in-car state determination unit 130 adds the period time during which the opening / closing determination unit 120 performs the door opening / closing determination to the non-detection continuous time, so Count up time.

Then, the in-car state determination unit 130 determines whether or not the non-detection continuous time is greater than or equal to the reset time threshold (step S342). When it is determined that the reset time threshold is exceeded (step S342: YES), the in-car state determination unit 130 sets the detection accumulated time to 0 (step S351).
Thereafter, the process proceeds to step S333.

  On the other hand, when it is determined in step S323 that the accumulated detection time is less than the detection time threshold (step S323: NO), and in step S342, it is determined that the non-detection continuous time is less than the reset time threshold. (Step S342: NO), the process proceeds to Step S333.

  As described above, the door open / close determination device 10 performs the door open / close determination based on the brightness of the determination target range set in the captured image of the door, and thus indicates whether the door is open or closed. There is no need to acquire the signal from the outside. For example, the in-car state monitoring apparatus 100 (open / close determination unit 120) is based on the brightness of the determination target range (front door determination target range A11 and rear door determination target range A12) set in the captured image in the basket 500. Since opening / closing determination of the door (front door 510 or rear door 520) is performed, it is not necessary to acquire a signal indicating whether the door is in the open state or the closed state from the elevator 400.

  Accordingly, since it is not necessary to modify the external device to exchange the signal, the door opening / closing determination device 10 can be easily applied to an existing door, and the door opening / closing determination device 10 can be applied. Can reduce the cost of remodeling. For example, there is no need to add modification to the elevator 400 (for example, the control panel of the elevator 400) to output a signal indicating whether the door is open or closed. The in-car condition monitoring apparatus 100 can be easily applied, and the modification cost can be suppressed by applying the in-car condition monitoring apparatus 100 to the elevator 400.

  Here, when remodeling the control panels of a plurality of elevators with different manufacturing companies, the control panels are different for each manufacturing company, and a remodeling design is required for each manufacturing company, which may result in particularly high remodeling costs. On the other hand, the door opening / closing determination device 10 (for example, the in-car state monitoring device 100) can be applied to elevators of various manufacturing companies, and can suppress such modification costs.

  Further, the door open / close determination device 10 does not need to acquire a signal indicating whether the door is in an open state or a closed state, and therefore the communication amount between the door open / close determination device 10 and another device is small. . For example, since it is not necessary for the elevator 400 to transmit a signal indicating whether the door is in an open state or a closed state to the in-car state monitoring device 100, the communication amount between the elevator 400 and the in-car state monitoring device 100 is high. Less is enough.

  Further, when the door open / close determining device 10 is applied to a plurality of doors, the door open / close determining device 10 is not required to obtain a signal indicating whether each door is in an open state or a closed state. And the amount of communication with other devices is particularly small. For example, the in-car state monitoring apparatus 100 does not need to acquire a signal indicating whether the front door 510 or the rear door 520 is in an open state or a closed state, and therefore, the elevator 400 and the car interior The amount of communication with the state monitoring apparatus 100 is particularly small.

  Further, by imaging a plurality of doors with a single imaging device and setting the determination target range of each door in the captured image of the imaging device, imaging necessary for the door open / close determination device 10 to perform door open / close determination The number of devices can be reduced. For example, the front door 510 and the rear door 520 are imaged by a single imaging device 610, and the front door determination target range A11 and the rear door determination target range A12 are set in the captured image by the imaging device 610, so that The number of imaging devices necessary for the state monitoring device 100 (opening / closing determination unit 120) to perform door opening / closing determination can be reduced to one.

  In addition, when the captured image in the determination target range in the open state of the door is bright, the in-car state monitoring apparatus 100 performs the door open / close determination more accurately by a simple operation of sticking a sheet having dark lightness to the door. it can. More specifically, the sheet having dark lightness is attached to the door so that the sheet covers the imaging target range when the door is closed (so that a part of the image of the sheet is included in the imaging target range). The difference in brightness of the image in the imaging target range between the open state and the closed state of the door can be increased, and the open / close determination unit 120 can perform the door open / close determination more accurately. For example, as described with reference to FIGS. 4 to 8, the front right door sheet 514 is attached to the front right door 512, so that the in-car state monitoring apparatus 100 (open / close determination unit 120) can more accurately detect the front right door. The opening / closing determination of the door 510 can be performed, and the rear left door sheet 523 is attached to the rear left door 521 so that the in-car state monitoring apparatus 100 can more accurately determine whether the rear door 520 is opened or closed. Can do.

  Further, the in-car state determination unit 130 determines the presence / absence of a cautionary state using the door opening / closing determination result of the opening / closing determination unit 120, so that the elevator user getting on and off in the door open state is detected as a rampage operation. It is possible to suppress erroneous detection of a state requiring attention. At this time, the in-car state determination unit 130 does not need to acquire a signal indicating whether the door is in the open state or the closed state from the elevator 400 by using the door open / close determination result of the open / close determination unit 120. The above-described effects such as reduction of remodeling costs and reduction of communication amount can be obtained.

  In the above, the case where the present invention is applied to an elevator door has been described as an example, but the present invention can be applied to various doors. For example, by applying the present invention to a store door and detecting the open state of the store door and notifying the store clerk, the risk that the store clerk overlooks the entrance and exit of the customer can be reduced, and the service is improved. be able to.

In the above description, the case where the present invention is applied to the detection of the violent operation state has been described as an example. However, the present invention can be applied to detection of various caution states.
For example, the present invention can be applied to detection of a staying state in which an elevator user stays in a car for a long time. For example, in an elevator installed in a station and going back and forth between the home floor and the ticket gate floor, it is normal for all passengers to leave the cage every time they arrive at one of the floors and the door opens. Is considered a kind of caution. In particular, in a through-type elevator that has different doors that open depending on the arrival floor, such as the elevator 400 described above, a situation in which the user stays without noticing that the door has opened can be seen.
Therefore, the in-car state monitoring device 100 can assist the user by detecting the staying state and notifying the user in the car that the door is open. For example, in a through-type elevator, the in-car state monitoring device 100 detects a staying state and notifies the user in the car that the door on the opposite side from the entrance is open, so that it is unfamiliar with the through-type elevator. Can assist new users.

Note that a program for realizing all or part of the functions of the door opening / closing determination device 10 or the in-car condition monitoring device 100 is recorded on a computer-readable recording medium, and the program recorded on the recording medium is stored in the computer. The processing of each unit may be performed by reading it into the system and executing it. Here, the “computer system” includes an OS and hardware such as peripheral devices.
Further, the “computer system” includes a homepage providing environment (or display environment) if a WWW system is used.
The “computer-readable recording medium” refers to a storage device such as a flexible medium, a magneto-optical disk, a portable medium such as a ROM and a CD-ROM, and a hard disk incorporated in a computer system. Furthermore, the “computer-readable recording medium” dynamically holds a program for a short time like a communication line when transmitting a program via a network such as the Internet or a communication line such as a telephone line. In this case, a volatile memory in a computer system serving as a server or a client in that case, and a program that holds a program for a certain period of time are also included. The program may be a program for realizing a part of the functions described above, and may be a program capable of realizing the functions described above in combination with a program already recorded in a computer system.

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and includes design changes and the like without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 10 Door open / close determination apparatus 100 In-car state monitoring apparatus 110 Captured image acquisition part 120 Open / close determination part 130 In-car state determination part 140 Audio signal output part 150 Determination result transmission part

Claims (7)

A captured image acquisition unit that acquires a captured image of a determination target range that is a fixed imaging range corresponding to a predetermined portion of the door in a closed state of the door of the elevator;
An open / close determination unit that determines whether the door is in an open state or a closed state based on brightness of a captured image in the determination target range acquired by the captured image acquisition unit;
If the door is judged that the closing judging unit to be in a closed state, based on the captured image in the elevator car to the captured image acquisition unit acquires the operation amount of the person or object within said elevator car An in-car state determination unit that calculates and determines the state of a person or an object in the car in the elevator based on the movement amount;
Comprising
The in-car state determination unit
Counting up the accumulated time when the operation amount is determined to be equal to or greater than the detection operation amount threshold,
If the door is judged that the closing judging unit to be in an open state, and, at least contiguous time reset time threshold that satisfies any one of the case where the operation amount is determined to be less than the detection operation amount threshold If it is determined that it is the above, the accumulated time is reset to 0,
If it is determined that the accumulated time is equal to or greater than a detection time threshold, a ramp detection signal indicating that a ramp operation state has been detected is output. The predetermined portion of the door has a brightness that the brightness of the captured image in the determination target range acquired by the captured image acquisition unit in the closed state of the door is darker than the predetermined brightness,
The open / close determination unit determines that the door is in an open state when the brightness of the captured image in the determination target range acquired by the captured image acquisition unit is brighter than the predetermined brightness, and the captured image When the brightness of the captured image in the determination target range acquired by the acquisition unit is darker than the predetermined brightness, the door is determined to be closed;
The in-car state monitoring apparatus according to claim 1.   The in-car state monitoring device according to claim 1, wherein the door is a door of a penetrating elevator. The elevator comprises a plurality of doors,
The captured image acquisition unit acquires, for each of the plurality of doors, a captured image of a determination target range that is a fixed imaging range corresponding to a predetermined portion of the door in a closed state of the door,
For each of the plurality of doors, the open / close determination unit is in an open state based on the brightness of a captured image in the determination target range corresponding to a predetermined portion of the door in the closed state of the door. To determine whether or not
The in-car state monitoring device according to any one of claims 1 to 3 characterized by things. A sheet having a brightness that makes the brightness of the captured image in the determination target range acquired by the captured image acquisition unit in the closed state of the door darker than the predetermined brightness is attached to the predetermined portion of the door. The in- car state monitoring device according to claim 3, wherein An in-car state monitoring method of an in-car state monitoring device for monitoring the state in an elevator car,
A captured image acquisition step of acquiring a captured image of a determination target range that is a fixed imaging range corresponding to a predetermined portion of the door in a closed state of the elevator door;
An open / close determination step for determining whether the door is in an open state or a closed state based on the brightness of the captured image in the determination target range acquired in the captured image acquisition step;
If the door is determined by the on-off determination step and in the closed state, on the basis of the captured image in the elevator car obtained by the captured image acquisition step, an operation amount of the person or object within said elevator car An in-car state determination step for calculating and determining a state of a person or an object in the car in the elevator based on the amount of movement;
Including
In the basket state determination step,
Counting up the accumulated time when the operation amount is determined to be equal to or greater than the detection operation amount threshold,
If the door is determined by the on-off determination step and in the open position, and, at least contiguous time reset time threshold that satisfies any one of the case where the operation amount is determined to be less than the detection operation amount threshold If it is determined that it is the above, the accumulated time is reset to 0,
When it is determined that the accumulated time is equal to or greater than a detection time threshold, a ramp detection signal indicating that a ramp operation state has been detected is output. To the computer that controls the in-car state monitoring device that monitors the state in the elevator car,
A captured image acquisition step of acquiring a captured image of a determination target range that is a fixed imaging range corresponding to a predetermined portion of the door in a closed state of the elevator door;
An open / close determination step for determining whether the door is in an open state or a closed state based on the brightness of the captured image in the determination target range acquired in the captured image acquisition step;
If the door is determined by the on-off determination step and in the closed state, on the basis of the captured image in the elevator car obtained by the captured image acquisition step, an operation amount of the person or object within said elevator car An in-car state determination step for calculating and determining a state of a person or an object in the car in the elevator based on the amount of movement;
And execute
In the basket state determination step,
Counting up the accumulated time when the operation amount is determined to be equal to or greater than the detection operation amount threshold,
If the door is determined by the on-off determination step and in the open position, and, at least contiguous time reset time threshold that satisfies any one of the case where the operation amount is determined to be less than the detection operation amount threshold If it is determined that it is the above, the accumulated time is reset to 0,
A program for operating to output a rampage detection signal indicating that a rampage operation state is detected when it is determined that the accumulated time is equal to or greater than a detection time threshold.

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