KR102207762B1 - Elevator safety accident prevention apparatus using infrared sensor - Google Patents

Abstract

The present invention relates to an elevator safety accident prevention apparatus using an infrared sensor, wherein a user entry detection unit that detects a user's entry into an inspection area formed on an upper portion of an elevator or a pit (PIT), and checks the elevator when the user entry is detected. An elevator operation control unit that controls the operation of the elevator by diagnosing the risk of a safety accident according to whether the safety switch and the inspection operation switch are operated, and an alarm in the inspection area of the upper part of the elevator and each of the pit when the risk of the safety accident is diagnosed. It includes an alarm providing unit to provide. Accordingly, the present invention can control the operation of the elevator based on the elevator PIT and the infrared sensor installed on the upper part of the elevator to prevent a safety accident of a worker.

Description

Elevator safety accident prevention device using infrared sensor {ELEVATOR SAFETY ACCIDENT PREVENTION APPARATUS USING INFRARED SENSOR}

The present invention relates to an elevator safety accident prevention technology using an infrared sensor, and more particularly, an elevator using an infrared sensor that can control elevator operation based on an infrared sensor installed on a hoistway PIT and an upper portion of the elevator to prevent safety accidents of workers. It relates to a safety accident prevention device.

In the existing elevator system, in order to enter the upper part of the PIT or CAR, the operator of the elevator manually operates the safety switch installed on the upper part of the PIT or CAR and then enters the system. In this case, if the operator enters the upper part of the PIT or CAR without accidentally or carelessly manipulating the safety switch, the risk of a safety accident has a very large problem. In fact, safety accidents due to this situation occur very frequently, and the development of technology to improve them is required.

Korean Patent Laid-Open Patent No. 10-2005-0053197 (2005.06.08) relates to an elevator safety management system and safety management method. In the event of an accident such as an elevator failure or a crime, the manager can quickly recognize it and take follow-up measures. , It discloses an elevator safety management system and safety management method that can quickly and safely rescue occupants.

Korean Patent Publication No. 10-2005-0053197 (2005.06.08)

An embodiment of the present invention is to provide an elevator safety accident prevention apparatus using an infrared sensor that can prevent a worker's safety accident by controlling an elevator operation based on an infrared sensor installed on a hoistway PIT and an elevator.

An embodiment of the present invention provides an elevator safety accident prevention apparatus using an infrared sensor that can detect the user's entry by using a plurality of infrared sensor modules installed at a specific position on the top of the elevator and on the pit and arranged at specific intervals. I want to provide.

An embodiment of the present invention is to provide an elevator safety accident prevention apparatus using an infrared sensor capable of controlling an elevator operation based on an operation of a safety switch and an inspection operation switch when a user entry into the upper or pit of an elevator is detected. .

Among embodiments, an elevator safety accident prevention apparatus using an infrared sensor includes a user entry detection unit that detects a user's entry into an inspection area formed on an upper portion of the elevator or a pit (PIT), and when the user entry is detected, the elevator is inspected. An elevator operation control unit that controls the operation of the elevator by diagnosing the risk of a safety accident according to the operation of the safety switch and the inspection operation switch, and provides an alarm to the inspection area of the upper part of the elevator and each of the pit when the risk of the safety accident is diagnosed. It includes an alarm providing unit.

The user entry detection unit detects whether the plurality of infrared sensor modules are installed above the elevator or at a specific position of the pit and arranged and arranged at specific intervals, and whether the plurality of infrared sensor modules are blocked, and operates according to the user's entry. It may include an operation signal output module for outputting a signal.

The plurality of infrared sensor modules are installed to be spaced apart by a first reference interval in a vertical direction from the upper part of the elevator or the bottom surface of the pit, and each infrared sensor module is aligned at a second reference interval along the upper part of the elevator or the edge of the pit. Can be deployed.

When both the safety switch and the inspection operation switch do not operate, the elevator operation control unit may diagnose the safety accident risk, provide the warning, and maintain a state in which the elevator cannot be started.

When only one of the safety switch and the inspection operation switch is operated, the elevator operation control unit determines the provision of the alarm according to the operation of the safety switch and maintains the inoperable state of the elevator or the operation of the inspection operation switch Accordingly, it is possible to control the transition of the elevator to the inspection operation mode.

The alarm providing unit provides the alarm when there is an operation of an open signal for the landing door and an operation of a closing signal for the elevator door, and can cancel the alarm when there is an operation of the closing signal for both the landing and the elevator door. have.

The disclosed technology can have the following effects. However, since it does not mean that a specific embodiment should include all of the following effects or only the following effects, it should not be understood that the scope of the rights of the disclosed technology is limited thereby.

The elevator safety accident prevention apparatus using an infrared sensor according to an embodiment of the present invention can detect the user's entry by using a plurality of infrared sensor modules installed at a specific position on the top of the elevator and on the pit and arranged at specific intervals. have.

The elevator safety accident prevention apparatus using an infrared sensor according to an embodiment of the present invention prevents safety accidents by controlling the operation of the elevator based on the operation of the safety switch and the inspection operation switch when a user entry into the upper or pit of the elevator is detected. I can.

1 is a view for explaining an elevator safety accident prevention apparatus using an infrared sensor according to an embodiment of the present invention.
FIG. 2 is a block diagram illustrating a functional configuration of the elevator safety accident prevention apparatus in FIG. 1.
3 is a flow chart illustrating a process of preventing an elevator safety accident performed in the apparatus for preventing safety accidents in the elevator of FIG. 1.
FIG. 4 is an exemplary diagram illustrating an arrangement of an infrared sensor module constituting the user entry detection unit of FIG. 2.
5 is an exemplary diagram illustrating a motion detection circuit constituting a user entry detection unit in FIG. 2.
6 and 7 are flowcharts illustrating an elevator control process for preventing a safety accident performed by the elevator safety accident prevention apparatus in FIG. 1.

Since the description of the present invention is merely an embodiment for structural or functional description, the scope of the present invention should not be construed as being limited by the embodiments described in the text. That is, since the embodiments can be variously changed and have various forms, the scope of the present invention should be understood to include equivalents capable of realizing the technical idea. In addition, since the object or effect presented in the present invention does not mean that a specific embodiment should include all of them or only those effects, the scope of the present invention should not be understood as being limited thereto.

Meanwhile, the meaning of terms described in the present application should be understood as follows.

Terms such as "first" and "second" are used to distinguish one component from other components, and the scope of rights is not limited by these terms. For example, a first component may be referred to as a second component, and similarly, a second component may be referred to as a first component.

When a component is referred to as being "connected" to another component, it should be understood that although it may be directly connected to the other component, another component may exist in the middle. On the other hand, when it is mentioned that a certain component is "directly connected" to another component, it should be understood that no other component exists in the middle. On the other hand, other expressions describing the relationship between the constituent elements, that is, "between" and "just between" or "neighboring to" and "directly neighboring to" should be interpreted as well.

Singular expressions are to be understood as including plural expressions unless the context clearly indicates otherwise, and terms such as “comprise” or “have” refer to implemented features, numbers, steps, actions, components, parts, or It is to be understood that it is intended to designate that a combination exists and does not preclude the presence or addition of one or more other features or numbers, steps, actions, components, parts, or combinations thereof.

In each step, the identification code (for example, a, b, c, etc.) is used for convenience of explanation, and the identification code does not describe the order of each step, and each step has a specific sequence clearly in context. Unless otherwise stated, it may occur differently from the stated order. That is, each of the steps may occur in the same order as specified, may be performed substantially simultaneously, or may be performed in the reverse order.

The present invention can be embodied as computer-readable codes on a computer-readable recording medium, and the computer-readable recording medium includes all types of recording devices storing data that can be read by a computer system. . Examples of computer-readable recording media include ROM, RAM, CD-ROM, magnetic tape, floppy disk, and optical data storage devices. Further, the computer-readable recording medium is distributed over a computer system connected by a network, so that the computer-readable code can be stored and executed in a distributed manner.

All terms used herein have the same meaning as commonly understood by one of ordinary skill in the field to which the present invention belongs, unless otherwise defined. Terms defined in commonly used dictionaries should be construed as having meanings in the context of related technologies, and cannot be construed as having an ideal or excessive formal meaning unless explicitly defined in the present application.

1 is a view for explaining an elevator safety accident prevention apparatus using an infrared sensor according to an embodiment of the present invention.

Referring to FIG. 1, an elevator safety accident prevention apparatus using an infrared sensor (hereinafter, referred to as an elevator safety accident prevention apparatus) 100 includes a processor 110, a memory 130, a user input/output unit 150, and a network input/output. It may include a unit 170.

The elevator safety accident prevention apparatus 100 may correspond to a computing device capable of predicting an elevator safety accident by using an elevator PIT and an infrared sensor installed on an upper portion of the elevator. In one embodiment, the elevator safety accident prevention apparatus 100 may be included and implemented inside a system that controls the operation of an elevator, and may be wirelessly connected to an external system such as a user terminal through Bluetooth, WiFi, etc., and a network Data can be exchanged with external systems through.

The elevator safety accident prevention apparatus 100 may be implemented including a database (not shown in FIG. 1), and may be implemented separately from the database. When implemented separately from the database, the elevator safety accident prevention apparatus 100 may be connected to the database to transmit and receive data. The database may store various pieces of information used by the elevator safety accident prevention apparatus 100 to detect a user's entry into the upper part of the elevator or to the PIT, detect the risk of a safety accident, and perform elevator operation control for prevention. For example, the database may store operation signals related to an infrared sensor, operation signals of a platform or elevator doors, and information for diagnosing a risk of a safety accident.

The processor 110 detects the user's entry through the infrared sensor and can execute each procedure of elevator control for preventing safety accidents, and manage the memory 130 that is read or written throughout the process. The synchronization time between the volatile memory and the non-volatile memory in 130 can be scheduled. The processor 110 can control the overall operation of the elevator safety accident prevention device 100, and is electrically connected to the memory 130, the user input/output unit 150, and the network input/output unit 170 to prevent data flow between them. Can be controlled. The processor 110 may be implemented as a CPU (Central Processing Unit) of the elevator safety accident prevention apparatus 100.

The memory 130 is implemented as a non-volatile memory such as a solid state disk (SSD) or a hard disk drive (HDD), and may include an auxiliary storage device used to store all data required for the elevator safety accident prevention device 100. In addition, a main memory device implemented with a volatile memory such as random access memory (RAM) may be included.

The user input/output unit 150 may include an environment for receiving a user input and an environment for outputting specific information to a user. For example, the user input/output unit 150 may include an input device including an adapter such as a touch pad, a touch screen, an on-screen keyboard, or a pointing device, and an output device including an adapter such as a monitor or a touch screen. In one embodiment, the user input/output unit 150 may correspond to a computing device connected through a remote connection, and in that case, the elevator safety accident prevention apparatus 100 may be performed as a server.

The network input/output unit 170 includes an environment for connecting to an external device or system through a network, for example, a local area network (LAN), a metropolitan area network (MAN), a wide area network (WAN), and a VAN ( Value Added Network) may include an adapter for communication.

FIG. 2 is a block diagram illustrating a functional configuration of the elevator safety accident prevention apparatus in FIG. 1.

Referring to FIG. 2, the elevator safety accident prevention apparatus 100 may include a user entry detection unit 210, an elevator operation control unit 230, an alarm providing unit 250, and a control unit 270.

The user entry detection unit 210 may detect a user entry into the inspection area formed on the upper part of the elevator or the pit (PIT). The upper part of the elevator or the pit is a place where access is restricted, and since it is difficult for a user to enter during a general elevator operation process, entry into the space may be understood as for inspection or repair of the elevator. Even when entering for inspection or repair, entry without additional safety measures can lead to a very dangerous situation. The inspection area is a space formed above the elevator or in the pit, and may correspond to a space where an inspector enters for inspection of the elevator. The user entry detection unit 210 may acquire situation information for preventing an elevator safety accident by detecting a user entry into the inspection area.

In one embodiment, the user entry detection unit 210 detects whether a plurality of infrared sensor modules and a plurality of infrared sensor modules are installed at a specific position on the top of an elevator or on a pit and arranged and arranged at specific intervals to enter the user. It may include an operation signal output module for outputting the operation signal according to. The infrared sensor module may include a light-emitting unit and a light-receiving unit, and detect an object between the light-emitting unit and the light-receiving unit based on a signal sensed from the infrared sensor. In addition, the infrared sensor module may be arranged and arranged at a specific position at a specific interval in order to sense all areas of the elevator or the pit.

In one embodiment, the plurality of infrared sensor modules are installed vertically from the top of the elevator or the bottom of the pit by a first reference interval, and each infrared sensor module is aligned with the second reference interval along the top of the elevator or the edge of the pit. Can be deployed. This will be described in more detail in FIG. 4.

When a user entry is detected, the elevator operation control unit 230 may control the operation of the elevator by diagnosing the risk of a safety accident according to whether the safety switch for inspection of the elevator and the inspection operation switch are operated. The safety switch is a switch capable of stopping the operation of the elevator in case of an emergency, and the operation of the elevator may be stopped when the corresponding switch is operated. The inspection operation switch is a switch for controlling the operation of the elevator for the purpose of inspection of the elevator. When the switch is operated, the elevator is switched to the inspection operation mode, so that only the operation for inspection can be performed. The elevator operation control unit 230 may determine the normal entry if the safety switch or the inspection operation switch is operating even when the user's entry is detected from the top or the pit of the elevator.

In one embodiment, the elevator operation control unit 230 may diagnose the risk of a safety accident, provide an alarm, and maintain an inoperable state of the elevator when both the safety switch and the inspection operation switch do not operate. If both the safety switch and the inspection operation switch do not operate, it may mean that the elevator is in a normal operating state, and there is a very high risk of a safety accident if the user enters the top or pit of the elevator during the normal operation of the elevator. In this situation, the elevator operation control unit 230 may immediately provide an alarm and stop the operation of the elevator. If the elevator stops operating, the elevator is placed in a state of inability to maneuver, and normal operation can be resumed only if appropriate measures are taken.

In one embodiment, when only one of the safety switch and the inspection operation switch is operated, the elevator operation control unit 230 determines to provide an alarm according to the operation of the safety switch, and maintains an inoperable state of the elevator or operates the inspection operation switch. According to this, it is possible to control the transition of the elevator to the inspection operation mode. If the user's entry from the top or pit of the elevator is detected during the normal operation of the elevator, it may be a very dangerous situation, but if the safety switch or the inspection operation switch is operating, it may correspond to the entry in a normal situation.

Therefore, the elevator operation control unit 230 first checks the operation of the safety switch, determines that it is a normal situation when the safety switch is in operation, and releases the alarm if an alarm for the upper part of the elevator or pit is output, and the elevator is unable to start. You can control it to stay in state. In addition, the elevator operation control unit 230 checks the operation of the inspection operation switch secondarily when the safety switch is not operated, and switches to the inspection operation mode when the inspection operation switch is in operation, so that the inspection of the elevator can be performed. can do.

When the risk of a safety accident is diagnosed, the alarm providing unit 250 may provide an alarm to an upper portion of the elevator and an inspection area of each pit. For example, when the operation of the platform door and the elevator door is different, or when a user's entry into the upper part of the elevator or the pit is detected during normal operation of the elevator, the risk of a safety accident related to the elevator may be diagnosed. When the risk of a safety accident is diagnosed by the elevator operation control unit 230, the alarm providing unit 250 may provide an alarm in various ways to an inspection area of the upper part of the elevator and each pit.

In one embodiment, the alarm providing unit 250 provides an alarm when there is an operation of an open signal for a platform door and a closing signal for an elevator door, and an alarm when there is an operation of a closing signal for both the platform and the elevator door. Can be turned off. If the elevator is in normal operation, it is common to open and close the platform door and the elevator door at the same time, and if the operation of the platform door and the elevator door is different, it may be considered a high risk of a safety accident. If the elevator door is closed while the landing door is open, the alarm providing unit 250 may determine that the risk of a safety accident is high and provide an alarm to the upper and pit of the elevator. In addition, the alarm providing unit 250 determines that it is a normal situation and provides an alarm if an operation signal is not detected by both the infrared sensor of the pit and the infrared sensor of the upper part of the elevator and there is an operation of the closing signal of both the platform and the elevator door. You can stop.

In one embodiment, the alarm providing unit 250 may provide an alarm through at least one of a notification light installed at the top of the elevator and along the edge of the pit and a notification speaker installed at the top of the elevator and at the center of the pit. The alarm providing unit 250 may call the attention of a user entering the upper or pit of the elevator through a notification light, and reproduce a warning sound through a speaker to quickly recognize the risk of a safety accident to the user. The notification lights are installed along the upper part of the elevator and along the outer edge of the pit to provide an immediate alarm regardless of the user's gaze direction, and the notification speaker is installed at the top of the elevator and at the center of the pit to provide an immediate alarm regardless of the user's location. Can provide.

The control unit 270 controls the overall operation of the elevator safety accident prevention apparatus 100, and manages the control flow or data flow between the user entry detection unit 210, the elevator operation control unit 230, and the alarm providing unit 250. have.

3 is a flow chart illustrating a process of preventing an elevator safety accident performed in the apparatus for preventing safety accidents in the elevator of FIG. 1.

Referring to FIG. 3, the elevator safety accident prevention apparatus 100 may detect a user's entry into the inspection area formed in the upper part of the elevator or the pit (PIT) through the user entry detection unit 210 (step S310). The elevator safety accident prevention apparatus 100 controls the operation of the elevator by diagnosing the risk of a safety accident according to the operation of the safety switch and the inspection operation switch for inspection of the elevator when a user entry is detected through the elevator operation control unit 230 It can be done (step S330). The elevator safety accident prevention apparatus 100 may provide an alarm to the inspection area of the upper part of the elevator and each of the pit when the risk of a safety accident is diagnosed through the alarm providing unit 250 (step S350).

FIG. 4 is an exemplary diagram illustrating an arrangement of an infrared sensor module constituting the user entry detection unit of FIG. 2.

Referring to FIG. 4, the elevator safety accident prevention apparatus 100 may detect a user's entry into an inspection area formed in the upper part of the elevator or in the pit through the user entry detection unit 210. In one embodiment, the user entry detection unit 210 may include a plurality of infrared sensor modules that are installed to be spaced apart by a first reference interval in a vertical direction from the top of the elevator or the bottom surface of the pit, and each infrared sensor module is the top of the elevator. Alternatively, it may be arranged and arranged at a second reference interval along the edge of the pit.

In Figure (a), the infrared sensor module included in the user entry detection unit 210 may be installed to be spaced apart by 1000 mm from the top of the elevator or the bottom of the pit. In this case, the first reference interval may be 1000 mm. In one embodiment, the infrared sensor module may be installed to be spaced apart by 1000 ± α mm from the top of the elevator or the bottom of the pit, and α may be determined according to the area of the elevator and the pit, and the depth of the pit.

In an embodiment, the infrared sensor module may be installed to be spaced apart by a first reference interval calculated through the following equation based on the area of the elevator and the pit and the depth of the pit.

[Equation]

(1) D = 1000 ± α

(2) α =

Here, D denotes the first reference interval, α denotes the reference range, D ₁ denotes the area of the top of the elevator, D ₂ denotes the area of the pit, and h denotes the depth of the pit. The reference range may be calculated as a logarithmic value obtained by multiplying the average value of the area of the upper part of the elevator and the pit by the depth of the pit.

In Figures (b) and (c), a plurality of infrared sensor modules may be arranged and arranged at intervals of 300 mm along the top of the elevator or the edge of the pit. In this case, the second reference interval may be 300 mm. In one embodiment, the plurality of infrared sensor modules may be arranged to be aligned by 300 ± β mm along the upper part of the elevator or the corner of the pit, and β may be determined according to the area of the upper part of the elevator and the pit and the length of the corner. In addition, an interval between the upper part of the elevator and the infrared sensor modules disposed in each pit may be set differently.

5 is an exemplary diagram illustrating a motion detection circuit constituting a user entry detection unit in FIG. 2.

Referring to FIG. 5, the user entry detection unit 210 may include a plurality of infrared sensor modules and an operation signal output module. Figure (a) can correspond to the motion detection circuit installed on the upper part of the elevator, and figure (b) can correspond to the motion detection circuit installed in the pit. In one embodiment, the user entry detection unit 210 may be implemented by including the motion detection circuit of Figures (a) and (b), and in this case, the motion detection circuit includes a plurality of infrared sensor modules and a motion signal output module. Can include.

Each motion detection circuit may be implemented in a form in which a plurality of infrared sensor modules are connected in series, and when the light from the light emitting part and the light receiving part of the sensor is not blocked, the photo coupler may maintain a turn-on state. , When an infrared ray between the light-emitting unit and the light-receiving unit is blocked according to the user's entry into the elevator or the pit, the photo coupler may be turned off. The user entry detection unit 210 may detect the operation of the infrared sensor module in real time by the motion detection circuit, and may detect the user's entry into the upper or pit of the elevator.

6 and 7 are flowcharts illustrating an elevator control process for preventing safety accidents performed by the elevator safety accident prevention apparatus in FIG. 1.

Referring to FIG. 6, the elevator safety accident prevention apparatus 100 may provide an alarm based on operation signals of a platform door and an elevator door. For example, if the elevator door closing confirmation signal is activated while the elevator door opening confirmation signal is activated, there is a high possibility of the user entering the elevator or the pit, and there is a risk of a safety accident. The safety accident prevention apparatus 100 may provide an alarm to the upper part of the elevator and the inspection area of the pit through the alarm providing unit 250. However, when the platform door and the elevator door are opened or closed at the same time, the elevator safety accident prevention apparatus 100 may determine that it is in a normal operating state and may not perform separate control.

Referring to FIG. 7, the elevator safety accident prevention apparatus 100 may detect a user's entry into the upper or pit of the elevator through the user entry detection unit 210. If a user entry is detected by the user entry detection unit 210, the elevator safety accident prevention device 100 diagnoses the risk of a safety accident according to whether the safety switch or the inspection operation switch is operated, and provides an alarm or controls the operation of the elevator. You can do it. For example, if there is no operation regarding the safety switch or the inspection operation switch, there is a risk of occurrence of a safety accident to the user who enters the upper or pit of the elevator, so the elevator safety accident prevention device 100 provides an alarm and stops the elevator. It can be kept in an inoperable state.

If the safety switch is operated, since entry into the upper part of the elevator or the pit is likely to be the purpose for inspection, the elevator safety accident prevention apparatus 100 may stop providing an alarm and maintain the state in which the elevator cannot be started. In addition, if the inspection operation switch is operated, it corresponds to a state in which inspection of the elevator is required, so that the elevator safety accident prevention apparatus 100 may perform a change to the inspection operation mode for the elevator.

Although the above has been described with reference to the preferred embodiments of the present invention, those skilled in the art will variously modify and change the present invention within the scope not departing from the spirit and scope of the present invention described in the following claims. You will understand that you can do it.

100: elevator safety accident prevention device
110: processor 130: memory
150: user input/output unit 170: network input/output unit
210: user entry detection unit 230: elevator operation control unit
250: alarm providing unit 270: control unit

Claims (6)

A user entry detection unit that detects a user entry into the inspection area formed on the elevator or in the pit (PIT);
An elevator operation control unit for controlling the operation of the elevator by diagnosing the risk of a safety accident according to whether the safety switch and the inspection operation switch for inspection of the elevator are operated when the user entry is detected; And
When the risk of the safety accident is diagnosed, including an alarm providing unit for providing an alarm to the inspection area of each of the upper and the pit of the elevator,
The user entry detection unit includes a plurality of infrared sensor modules,
The plurality of infrared sensor modules are installed to be spaced apart by a first reference interval in a vertical direction from the upper part of the elevator or the bottom surface of the pit, and each infrared sensor module is aligned at a second reference interval along the upper part of the elevator or the edge of the pit. And placed,
The first reference interval is determined by applying a first reference range α according to the area of the upper portion of the elevator and each of the pit and the depth of the pit, and the second reference interval is a second reference interval according to the area of the upper portion of the elevator and each of the pit and the length of the edge. It is determined by applying the reference range β,
The first and second reference intervals are elevator safety accident prevention apparatus using an infrared sensor, characterized in that calculated through the following equation.
[Equation]
(1) D = 1000 ± α
(2) α =

(Where, D is the first or second reference interval, α is the first reference range, D ₁ is the area of the top of the elevator, D ₂ is the area of the pit, and h is the depth of the pit In addition, when D corresponds to the second reference interval, (1) corresponds to D = 300 ± β (where β is the second reference range), and the unit of the equation is mm.)
The method of claim 1, wherein the user entry detection unit
A plurality of infrared sensor modules installed on the elevator or at a specific position of the pit and arranged at specific intervals; And
An elevator safety accident prevention apparatus using an infrared sensor, comprising: an operation signal output module configured to detect whether the plurality of infrared sensor modules are blocked and output an operation signal according to the user's entry.
delete The method of claim 1, wherein the elevator operation control unit
When both the safety switch and the inspection operation switch do not operate, the safety accident risk is diagnosed, the alarm is provided, and the elevator safety accident prevention device using an infrared sensor, characterized in that the elevator is maintained in an inoperable state.
The method of claim 1, wherein the elevator operation control unit
When only one of the safety switch and the inspection operation switch is operated, the provision of the alarm is determined according to the operation of the safety switch, and the operation of the elevator is maintained, or the inspection of the elevator according to the operation of the inspection operation switch Elevator safety accident prevention device using an infrared sensor, characterized in that for controlling the switching to the driving mode.
The method of claim 1, wherein the alarm providing unit
Infrared, characterized in that it provides the alarm when there is an operation of an open signal for the landing door and an operation of a closing signal for the elevator door, and releases the alarm when there is an operation of the closing signal of both the landing and the elevator door Elevator safety accident prevention device using sensors.

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