JP2013071795A - Emergency light failure detection device of elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To correctly detect a lighting state of an emergency light installed in an elevator car without using a dedicated monitoring instrument for emergency light checking.SOLUTION: An elevator car 3 includes an emergency light 23 to be turned on with an electric power of a battery 25 when a power source of an illumination apparatus 21 in a car causes power failure and a surveillance camera 26. The elevator control device 1 includes an elevator control part 11 which interrupts the power supply of the illumination apparatus 21 in the car in the course of checking the emergency light 23, performs switching to the battery 25 to turn on the emergency light 23, an image storage part 12 which stores the images acquired in the elevator car 3 at the lightning time of the emergency light 23 from the surveillance camera 26, and an emergency light state decision part 13 which decides the presence or absence of failure of the emergency light 23 by comparing the images stored in the image storage part 12 with a reference image imaged preliminary at the normal lighting time of the emergency light 23.

Description

  Embodiments of the present invention relate to a power failure lamp abnormality detection apparatus for an elevator that performs power failure detection of a power failure lamp installed in a passenger car.

  Usually, an elevator car is provided with a blackout lamp separately from the illumination lamp. When the car lighting power supply fails, the power supply is switched to the emergency power supply (battery) and the blackout lamp lights up. As the cause of the abnormality of the blackout lamp, the blackout lamp itself or the battery may be deteriorated. Normally, maintenance personnel manually shut off the car lighting power supply and turn on the power-off lamp and check for abnormalities by visual inspection.

  However, it is very troublesome for maintenance personnel to visually inspect, and it takes a lot of labor and time to check and turn around many properties one by one. In view of this, as an inspection method that does not involve maintenance personnel, a method of determining the presence / absence of an abnormality by comparing a current value flowing through a power lamp at the time of lighting with a reference value, a method of monitoring a voltage value of a battery, and the like are considered.

Japanese Patent Laid-Open No. 10-297838 JP-A-7-330240

  As described above, in the method of monitoring the current value of the blackout lamp and the voltage value of the battery, it is necessary to install a dedicated monitoring device for checking the blackout lamp, which causes a cost problem. In addition, since current and voltage depend on the temperature environment, there are problems such as lack of accuracy.

  Therefore, there is a need for an elevator power failure lamp abnormality detection device that can accurately detect the lighting state of a power failure light installed in a car without requiring a dedicated monitoring device for checking the power failure light.

  The power failure lamp abnormality detection device for an elevator according to the present embodiment is a crime prevention monitor that shoots a power failure light that is turned on by battery power when a power source of a lighting device installed in the passenger car is out of power, and the inside of the passenger car. In an apparatus for detecting an abnormality in a power failure lamp of an elevator provided with a camera, a control means for shutting off the power supply of the lighting equipment when switching the power failure light, switching to the battery and lighting the power failure light, and the power failure by the control means. An image storage means for acquiring and storing an image in the car when the lamp is turned on from the monitoring camera, an image stored in the image storage means, and a reference image previously taken when the power blackout lamp is normally lit And a power failure light state determination means for determining the presence or absence of abnormality of the power failure light.

FIG. 1 is a block diagram illustrating a configuration of an elevator blackout lamp abnormality detection device according to a first embodiment. FIG. 2 is a view showing a configuration in the car in the embodiment. FIG. 3 is a distribution diagram of luminance obtained from an image taken with the in-car lighting device in the same embodiment turned on. FIG. 4 is a distribution diagram of luminance obtained from an image taken in a state where the blackout lamp is turned on in the embodiment. FIG. 5 is a distribution diagram of luminance obtained from an image taken with both the in-car lighting device and the blackout lamp in the same embodiment turned off. FIG. 6 is a flowchart showing the operation of the blackout lamp inspection process by the elevator control device in the same embodiment. FIG. 7 is a block diagram illustrating a configuration of an elevator blackout lamp abnormality detection device according to the second embodiment.

  Hereinafter, embodiments will be described with reference to the drawings.

(First embodiment)
FIG. 1 is a block diagram illustrating a configuration of an elevator blackout lamp abnormality detection device according to a first embodiment.

  An elevator control device 1 is provided in a hoistway or a machine room in the building. The elevator control device 1 controls the entire elevator and functions as a power failure lamp abnormality detection device for detecting an abnormality of the power failure light 23 in the passenger car 3 described later.

  In the present embodiment, the elevator control device 1 includes an elevator control unit 11, an image storage unit 12, and a blackout lamp state determination unit 13.

  The elevator control unit 11 includes a microcomputer including a CPU, R0M, and RAM, and performs elevator operation control such as unillustrated hoisting machine drive control and call registration control, emergency control operation control, and the like. Further, the elevator control unit 11 shuts off the power source of the in-car lighting device 21 at the time of inspection of the blackout lamp 23, switches to the battery 25, and turns on the blackout lamp 23.

  In addition, you may give the auxiliary control apparatus installed in the landing which is not shown in figure the function regarding the inspection of the blackout lamp 23 by this elevator control apparatus 1.

  The car 3 is operation-controlled by the elevator control device 1 and moves between the floors at a predetermined speed. A tail cord 2 is provided between the elevator control device 1 and the car 3, and signal transmission and power supply are performed through the tail cord 2.

  In the car 3, an in-car lighting device 21 for illuminating the car interior is installed. The in-car lighting device 21 includes a fluorescent lamp or an LED (light emitting diode), and lights up by receiving required power through the blocking unit 22. Further, in the car 3, a blackout lamp 23 used in the event of a power failure is installed separately from the car lighting device 21. This blackout lamp 23 is composed of a fluorescent lamp or an LED, and is lit by receiving required power from the battery 25 via the switching unit 24 in the event of a power failure.

  Further, a surveillance camera 26 for crime prevention is installed in the car 3. This surveillance camera 26 is installed to monitor a suspicious person or the like. In the present embodiment, the power failure lamp 23 is determined to be abnormal using the image taken by the monitoring camera 26.

  That is, an image in the car 3 taken by the monitoring camera 26 is transferred to the elevator control device 1 via the tail cord 2 and stored in the image storage unit 12 provided in the elevator control device 1. The image storage unit 12 includes, for example, a hard disk device, and stores images captured by the monitoring camera 26 in chronological order.

  Here, the types of images stored in the image storage unit 12 include images taken with the in-car lighting device 21 turned on, images taken with the blackout light 23 turned on, and the car lighting device 21 as well. It is divided into images taken with neither of the blackout lights 23 being lit.

  The abnormality determination of the power lamp 23 uses an image taken with the power lamp 23 turned on. The power failure light state determination unit 13 reads an image taken with the power light 23 turned on at the time of inspection from the image storage unit 12, compares the image with a reference image previously taken when the power light 23 is normally lit, and performs a power failure. The presence or absence of abnormality of the lamp 23 is determined. The determination result is sent to the elevator control unit 11.

  In the example of FIG. 1, the image storage unit 12 and the blackout lamp state determination unit 13 are provided in the elevator control device 1, but may be installed in the car 3 or the like.

A specific example will be described below.
FIG. 2 is a diagram showing a configuration inside the car 3.

  A car door 31 is attached to the entrance of the front of the car 3 so as to be openable and closable, and an operation panel 32 is provided next to the car door 31. The operation panel 32 is provided with buttons on each floor, door opening / closing buttons, and the like.

  The in-car lighting device 21 is installed at the center of the ceiling surface of the car 3 so as to illuminate the car room from above. The blackout lamp 23 is installed in at least one place on the ceiling surface. Normally, the blackout lamp 23 is installed near the operation panel 32 in consideration of the situation in the blackout state. In the example of FIG. 2, the blackout lamp 23 is installed only at one place on the ceiling surface, but may be installed at a plurality of places.

  In addition, the surveillance camera 26 is installed on an upper side such as a side surface, a rear surface, or a front surface of the car 3. In this embodiment, since the monitoring camera 26 is used to detect the lighting state of the blackout lamp 23, the installation position of the monitoring camera 26 is adjusted so that the blackout lamp 23 is included in the shooting range. .

  For example, when the power failure lamp 23 is normally lit, such as when an elevator is installed, the car lighting device 21 is turned on, the power failure light 23 is turned on, and the car lighting device 21 is also turned off. It is assumed that a state in which both are turned off is photographed by the monitoring camera 26.

  When the luminance distribution of each pixel of these captured images is used as a parameter, the luminance distribution is digitized and expressed in contour lines as shown in FIGS.

  FIG. 3 is a luminance distribution diagram obtained from an image taken with the car lighting device 21 turned on, FIG. 4 is a luminance distribution diagram obtained from an image taken with the blackout lamp 23 lit, FIG. It is a distribution map of the brightness | luminance obtained from the image image | photographed in the state which turned off both the in-car lighting device 21 and the blackout lamp 23.

  When the in-car lighting device 21 is lit, it can be seen that the luminance of the central portion where the in-car lighting device 21 is installed is high in the image obtained from the monitoring camera 26. Further, when the blackout lamp 23 is lit, it can be seen that the brightness of the end portion where the blackout lamp 23 is installed is high. When neither the in-car lighting device 21 nor the blackout lamp 23 is lit, a numerical value with a low overall brightness is obtained.

  When checking the blackout lamp 23, a command is issued from the elevator control device 1 to the shut-off unit 22 that shuts off the car lighting power source, and the car lighting device 21 is turned off. The switching unit 24 is operated in conjunction with this, and emergency power is supplied from the battery 25 to the blackout lamp 23. At this time, an image taken by the monitoring camera 26 installed in the car 3 is stored in the image storage unit 12. On the other hand, the image (referred to as a reference image) taken by lighting the blackout lamp 23 at normal time is set in the blackout lamp state determination unit 13 and compared with the reference image, so that the blackout lamp 23 is normally Determine whether it is lit or in an abnormal state.

This will be described in detail with reference to FIG.
FIG. 6 is a flowchart showing the operation of the blackout lamp inspection process by the elevator control device 1.

  When the predetermined inspection time zone is reached (Yes in step S11), the elevator control unit 11 provided in the elevator control device 1 first moves the car 3 to a specific position (step S12).

  The inspection time zone is set to a time zone that does not hinder normal driving service, such as at night.

  In addition, the inspection of the blackout lamp 23 is performed with the car 3 closed. For example, if there is a security window in the car 3, external light enters from there and the lighting state of the blackout lamp 23 is set correctly. It may not be detected. Therefore, a floor having an environment that does not allow outside light to enter the car 3 such as when the lighting equipment at the landing is completely turned off during the inspection time is determined as the specific position, and the car 3 is moved there. Shall be allowed to. In addition, in an environment where outside light does not enter, it may be between floors.

  Subsequently, the elevator control unit 11 shuts off the in-car lighting power source through the shut-off unit 22 of the car 3 to turn off the in-car lighting device 21 (step S13), and switches to the battery 25 by the switching unit 24 to switch the power-off lamp. 23 is turned on (step S14).

  At this time, the state in the car 3 is photographed by the monitoring camera 26, and an image obtained by the photographing, that is, a photographed image when the power lamp is turned on is stored in the image storage unit 12 of the elevator control device 1 via the tail cord 2. Is done.

  The power-off lamp state determination unit 13 of the elevator control device 1 acquires a captured image when the power-off lamp is turned on from the image storage unit 12 (step S15), and compares it with a normal reference image set in advance (step S16). ). The power failure lamp state determination part 13 determines the presence or absence of abnormality of the power failure lamp 23 based on this comparison result (step S17).

  Specifically, the average value of the luminance of each pixel of the captured image and the average value of the luminance of each pixel of the reference image are respectively obtained, and when the difference between the two is equal to or greater than a preset threshold value, the power failure lamp 23 or the battery 25 Is determined to be abnormal (deteriorated).

  As another method, for example, the pixel having the highest luminance among the pixels of the photographed image is compared with the luminance of the pixel on the reference image corresponding to the pixel, and the difference between the two is equal to or larger than a preset threshold value. If there is, it may be determined that the power failure lamp 23 or the battery 25 is abnormal (deteriorated).

  Alternatively, the luminance of the peripheral pixel in the portion of the captured image that is directly below the blackout lamp 23 is compared with the luminance of each pixel on the reference image corresponding to the peripheral pixel, and a predetermined threshold value or more is set between the two. If there is a difference between them, it may be determined that the blackout lamp 23 or the battery 25 is abnormal (deteriorated). In short, any method may be used as long as the luminance is compared between the captured image and the reference image.

  Alternatively, a plurality of the threshold values may be prepared, and the state where the luminance of the blackout lamp 23 is lowered may be determined for each level. As a factor of the luminance drop of the power lamp 23, the power lamp 23 itself may be deteriorated or the battery 25 may be deteriorated.

  In this way, when it is determined from the image of the monitoring camera 26 whether there is an abnormality in the blackout lamp 23, the determination result is sent to the elevator controller 11 and stored as maintenance data. As a result, at the next elevator inspection, the maintenance staff can easily grasp the lighting state of the blackout lamp 23 simply by confirming the maintenance data stored in the elevator control section 11, and can respond to parts replacement as necessary. Can be taken.

  In addition, when the state where the blackout lamp 23 is not lit is detected by the blackout lamp state determination unit 13, a lamp (not shown) installed in the elevator control device 1 or the like is lit to indicate an abnormal state of the blackout lamp 23. You may make it alert | report to a management room etc. through the elevator control part 11.

  In this way, when checking the blackout lamp 23 installed in the car 3, the maintenance staff goes to the site, turns on the blackout lamp 23 by manual operation, and does not check the lighting state visually. Using the monitoring camera 26, it is possible to easily determine whether or not the blackout lamp 23 is abnormal. As a result, the maintenance staff can save the trouble of checking and turning around the blackout lamps 23 of each property one by one, and it is possible to cope with the problem by simply checking the inspection result of the blackout lamp 23 at the next inspection.

  Moreover, the surveillance camera 26 used for the inspection of the blackout lamp 23 is normally equipped in the car 3 as a standard for crime prevention. Therefore, it is possible to accurately detect the lighting state of the blackout lamp 23 using the existing monitoring camera 26 without installing a dedicated device for checking the blackout lamp 23.

  Further, when checking the blackout lamp 23, the influence of the external light is eliminated by moving the car 3 to a specific position so that the external light does not enter the car 3. Thus, it is possible to accurately determine the presence or absence of the abnormality of the blackout lamp 23 from the brightness of the captured image.

(Second Embodiment)
Next, a second embodiment will be described.

  In 2nd Embodiment, it is set as the structure which alert | reports the check result of a blackout lamp to an external monitoring center.

  FIG. 7 is a block diagram illustrating a configuration of an elevator blackout lamp abnormality detection device according to the second embodiment. In addition, the same code | symbol is attached | subjected to the same part as the structure of FIG. 1 in the said 1st Embodiment, and the description shall be abbreviate | omitted.

  In FIG. 7, the elevator control device 1 is connected to a remote maintenance terminal device 4 that serves as an interface with the monitoring center 5. The remote maintenance terminal device 4 has a function of performing communication control with an external monitoring center 5 via a communication network 6.

  The monitoring center 5 exists in a remote place, and remotely monitors the state of the elevator of each property via a computer (not shown) installed in the monitoring center 5. When the monitoring center 5 detects any abnormality in the elevator, the monitoring center 5 takes measures such as dispatching maintenance personnel to the site. It is also possible to send a control signal from the monitoring center 5 to remotely operate the elevator.

  In the example of FIG. 1, only one elevator is connected to the monitoring center 5, but actually, elevators of properties scattered in various places are connected, and the monitoring center 5 connects these elevators to the property. The unit is constantly monitored.

  Here, in the second embodiment, when the power failure lamp state determination unit 13 determines whether the power failure lamp 23 is abnormal, the elevator control device 1 sends the determination result to the monitoring center 5 via the remote maintenance terminal device 4. To inform. As a result, the monitoring center 5 can grasp the lighting state of the blackout lamp 23. For example, if the luminance of the blackout lamp 23 is lowered, the maintenance center 5 should be instructed to improve the next inspection. If the blackout lamp 23 is not lit at all, a maintenance staff can be dispatched immediately to deal with it quickly.

  As described above, according to these embodiments, it is possible to accurately detect the lighting state of the blackout lamp installed in the car without requiring a dedicated monitoring device for checking the blackout lamp. It is possible to provide an apparatus for detecting abnormalities in a power failure lamp of an elevator.

  In addition, although some embodiment of this invention was described, these embodiment is shown as an example and is not intending limiting the range of invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

  DESCRIPTION OF SYMBOLS 1 ... Elevator control apparatus, 2 ... Tail cord, 3 ... Car, 4 ... Remote maintenance terminal device, 5 ... Monitoring center, 11 ... Elevator control part, 12 ... Image memory | storage part, 13 ... Power failure light state determination part, 21 ... Illumination equipment in the car, 22 ... blocking section, 23 ... blackout lamp, 24 ... switching section, 25 ... battery, 26 ... surveillance camera, 31 ... car door, 32 ... operation panel.

Claims (5)

In an elevator blackout lamp abnormality detection device comprising a blackout lamp that is turned on by battery power when the power supply of a lighting device installed in the car goes out of power and a surveillance camera for crime prevention that images the inside of the car,
Control means for turning off the power supply of the lighting device at the time of inspection of the blackout lamp, switching to the battery and lighting the blackout lamp,
Image storage means for acquiring and storing an image in the car when the blackout lamp is turned on by the control means from the monitoring camera;
Comparing an image stored in the image storage means with a reference image previously taken when the power lamp is normally lit, a power failure light state determining means for determining the presence or absence of the power failure lamp is provided. Elevator blackout lamp abnormality detection device.   The blackout lamp state determination unit compares the luminance of the image stored in the image storage unit with the luminance of the reference image, and if the luminance difference between the two is equal to or greater than a preset threshold value, the blackout lamp or the battery The elevator blackout lamp abnormality detecting device according to claim 1, wherein the abnormality is determined to be abnormal.   2. The apparatus according to claim 1, wherein the controller moves the car to a specific position when the power lamp is turned on.   4. The elevator blackout lamp abnormality detection device according to claim 3, wherein the specific position is a floor or an environment having an environment in which outside light does not enter the passenger car. A terminal device that performs communication control with a monitoring center that remotely monitors the state of the elevator;
2. The elevator blackout lamp abnormality detection device according to claim 1, wherein the control means notifies the monitoring center of the determination result of the blackout lamp state determination means via the terminal device.

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