Safety operation management system and safety management method for elevator

Abstract

The invention provides a safety operation management system and a safety management method of an elevator, which can accurately detect the distance and the orientation of an operator in operation. A safety work management system (50) is provided with an orientation / distance measurement tag (20), an operator-side antenna (33), a portable terminal (30), and a distance / orientation estimation unit (34). An orientation / distance measurement tag (20) is provided in a car or hoistway, and has a tag-side antenna (23). The operator-side antenna (33) and the tag-side antenna (23) transmit and receive radio waves. The portable terminal (30) has a worker-side antenna (33) and is held by a worker. A distance / orientation estimation unit (34) estimates the orientation / distance (30) of the portable terminal with respect to the orientation / distance measurement tag (20) on the basis of information from the operator-side antenna (33) or the tag-side antenna (23).

Description

Technical Field

[0001] This invention relates to a safe operation management system and a safe management method for elevators. Background Technology

[0002] An elevator is a car that carries people and goods. In addition, during elevator maintenance and repair work, operators enter the area above the car and into the pit at the bottom of the shaft to carry out various inspections, diagnoses, and repairs.

[0003] As a technology for ensuring the safety of operators, there is, for example, the technology described in Patent Document 1. Patent Document 1 describes a technology that includes an elevator control device and multiple camera holders connected to the elevator control device and installed inside the elevator. When a camera device is inserted, the camera holders secure the camera device in a manner that it captures images of predetermined monitoring targets related to elevator inspection operations. Furthermore, the camera holders are connected to the camera devices in a communicative state, acquiring the captured information from the camera devices and transmitting it to the elevator control device.

[0004] Existing technical documents

[0005] Patent documents

[0006] Patent Document 1: Japanese Patent Application Publication No. 2016-222406 Summary of the Invention

[0007] The problem that the invention aims to solve

[0008] However, in the technology described in Patent Document 1, since a camera device is used to detect the operator's position and orientation, lighting is required inside the shaft to illuminate the operator. Furthermore, the brightness inside the shaft varies depending on the location of the external light or lighting fixture. Therefore, the technology described in Patent Document 1 suffers from the problem of not being able to accurately detect the distance and orientation (position) of the operator during operations.

[0009] In view of the above problems, the purpose of this invention is to provide an elevator safety operation management system and safety management method that can accurately detect the distance and position of the operator during operation.

[0010] Methods for solving problems

[0011] To address the aforementioned issues and achieve this objective, the elevator safety operation management system comprises a azimuth / distance measurement tag, an operator-side antenna, a portable terminal, and a distance / azimuth estimation unit. The azimuth / distance measurement tag is installed inside the elevator car or shaft and has a tag-side antenna. The operator-side antenna and the tag-side antenna transmit and receive radio waves. The portable terminal has an operator-side antenna and is held by the operator. The distance / azimuth estimation unit estimates the azimuth / distance of the portable terminal relative to the azimuth / distance measurement tag based on information from the operator-side antenna or the tag-side antenna.

[0012] In addition, the safety management method includes the procedures shown in (1) to (3) below.

[0013] (1) The procedure of installing a azimuth / distance measuring tag with a tag-side antenna in the elevator car or shaft.

[0014] (2) The process of transmitting and receiving radio waves through the operator-side antenna and the tag-side antenna of the portable terminal held by the operator.

[0015] (3) The process of estimating the orientation / distance of the portable terminal relative to the orientation / distance measurement tag based on information from the operator-side antenna or the tag-side antenna.

[0016] Invention Effects

[0017] Based on the elevator safety operation management system and safety management methods described above, the distance and location of the operator during operation can be accurately detected. Attached Figure Description

[0018] Figure 1 This is a schematic structural diagram of an elevator in an example of an application implementation example of a safety operation management system.

[0019] Figure 2 This is a top view of the elevator in the safety operation management system of the application implementation example.

[0020] Figure 3 This is a top view showing the safe and hazardous areas of the safety operation management system in the implementation example.

[0021] Figure 4 This is a block diagram illustrating an example of the control system of the safety operation management system described in the implementation example.

[0022] Figure 5 This is a block diagram illustrating another example of the control system of the safety operation management system described in the implementation example.

[0023] Figure 6 This is a flowchart illustrating the action examples of maintenance and repair work using the safety operation management system described in the implementation example. Detailed Implementation

[0024] The following is for reference Figures 1-6 The elevator safety operation management system and safety management method described in the embodiment example will be explained. Furthermore, common components are labeled with the same symbols in each figure.

[0025] 1. Implementation Examples

[0026] 1-1. Structural Example of an Elevator

[0027] First, refer to Figure 1 and Figure 2 The structure of the elevator in the safety operation management system of the application implementation example (hereinafter referred to as "this example") will be described.

[0028] Figure 1 This is a simplified structural diagram representing an elevator structure. Figure 2 This is a top view of the elevator.

[0029] like Figure 1 As shown, elevator 1 is installed in a shaft 110 formed within a building structure. Elevator 1 moves up and down within the shaft 110 and includes a car 120 for carrying people and goods, ropes 130, counterweight 140, traction machine 100, and control panel 190. A machine room 160 is provided at the top of the shaft 110.

[0030] The traction machine 100 is located in the machine room 160 and raises and lowers the car 120 by winding the rope 130. In addition, a deflector pulley 150 for laying the rope 130 is provided near the traction machine 100.

[0031] A car 120 is mounted at one end of the axial direction of the rope 130, and a counterweight 140 is mounted at the other end of the axial direction of the rope 130. Therefore, the elevator car 120 is connected to the counterweight 140 via the rope 130. When the traction machine 100 is driven, the car 120 and the counterweight 140 move up and down. A control panel 190 is located, for example, in the machine room 160. The control panel 190 controls the drive of the traction machine 100.

[0032] like Figure 2 As shown, a building side door 210 is provided at the stop floor where the car 120 stops in the building structure. In addition, during maintenance work, the operator W1 enters the hoistway 200 through the building side door 210.

[0033] In addition, the car 120 has a hollow car compartment 121. Furthermore, a car control box 10 is installed on the ceiling of the car compartment 121. Typically, the car control box 10 is located at a corner of the car compartment 121 on the front side opposite the building side door 210.

[0034] Furthermore, the structure of elevator 1 is not limited to Figure 1 The 1:1 winding elevator shown can also be used for various other types of elevators, such as 2:1 winding elevators, machine room-less elevators that do not have a machine room at the top of the shaft, and so on.

[0035] 1-2. Example of the structure of a safe operation management system

[0036] Next, refer to Figures 2 to 4 The structure of the safety operation management system 50 in this example will be explained.

[0037] Figure 3 This is a top view showing the safe and hazardous areas of the 50-level safe operation management system. Figure 4 This is a block diagram representing an example of the control system of the safe operation management system 50.

[0038] like Figures 2 to 4 As shown, the safety operation management system 50 includes a location / distance measuring tag 20 and a smart device 30 representing an example of a portable terminal held by the operator W1. Furthermore, the safety operation management system 50 uses so-called ultra-wideband wireless technology to measure the location (position) and distance between the location / distance measuring tag 20 and the smart device 30 held by the operator W1 via radio waves.

[0039] like Figure 2 and Figure 3 As shown, the orientation / distance measurement tags 20 are located at the four corners of the upper part of the car compartment 121 in the car 120. Alternatively, in this example, the orientation / distance measurement tags 20 are located in the car control box 10 mounted on the ceiling of the car compartment 121.

[0040] like Figure 4 As shown, the azimuth / distance measuring tag 20 includes an antenna control unit 21, a tag-side antenna 23 for transmitting and receiving radio waves, and a control unit 22. The control unit 22 controls the antenna control unit 21. The antenna control unit 21 controls the tag-side antenna 23. Furthermore, the tag-side antenna 23 can be transceivedly connected to the operator-side antenna 33 provided in the smart device 30.

[0041] The detectable area of ​​the orientation / distance measuring tag 20 is a horizontal area of ​​90° or more. Therefore, by placing one orientation / distance measuring tag 20 at any of the four corners of the car 120, the entire horizontal area within the hoistway 200 can be designated as a detectable area. This eliminates the need for multiple orientation / distance measuring tags 20, reducing the number of components and simplifying the installation process.

[0042] Furthermore, the number of orientation / distance measuring tags 20 is not limited to one; multiple orientation / distance measuring tags 20 can be installed in the car 120. This improves the orientation / distance detection accuracy for the operator W1 equipped with the intelligent device 30.

[0043] The intelligent device 30 includes: an antenna control unit 31, a control unit 32, an operator-side antenna 33 for receiving and transmitting radio waves, a range / azimuth estimation unit 34, a data storage unit 35, a judgment unit 36, an alarm unit 37, and a wireless communication unit 38. The antenna control unit 31 controls the operator-side antenna 33 to acquire information from the azimuth / range measurement tag 20. Then, the information acquired by the antenna control unit 31 is output to the range / azimuth estimation unit 34 and the control unit 32.

[0044] Based on information from the antenna control unit 31, the range / azimuth estimation unit 34 estimates the azimuth and range of the smart device 30 relative to the azimuth / range measurement tag 20. Then, the result estimated by the range / azimuth estimation unit 34 (estimated result) is output to the decision unit 36 ​​and the control unit 32.

[0045] Based on the estimation results output from the distance / direction estimation unit 34, the determination unit 36 ​​determines whether the operator W1 is in the danger zone P1 or the safe zone P2. The determination unit 36 ​​outputs the determination result to the control unit 32.

[0046] like Figure 3 As shown, the safety zone P2 is located at the center of the ceiling of the car compartment 121. Furthermore, the danger zone P1 extends from the outer periphery of the safety zone P2 to the walls 201 and 202 of the hoistway 200.

[0047] The setting of hazardous area P1 and safe area P2 is performed before operator W1 begins maintenance and repair work and is saved in data storage unit 35. As a method for defining hazardous area P1 and safe area P2, operator W1 can, for example, directly input dimensions into intelligent device 30. Alternatively, operator W1, control unit 32, or judgment unit 36 ​​can define hazardous area P1 and safe area P2 based on attached drawings, photographs, 3D maps, etc., of the car 120 and hoistway 200.

[0048] Furthermore, operator W1 inputs the manufacturing number ID of elevator 1 into the intelligent device 30. The control unit 32 can also obtain the dimensions of the car 120 and hoistway 200 based on the input manufacturing number ID, and define the hazardous area P1 and safe area P2 according to the obtained dimensions of the car 120 and hoistway 200. Additionally, the control unit 32 obtains the motion route history from the data storage unit 35, external sales offices, and the remote monitoring center 40. Then, the control unit 32 can also define the hazardous area P1 and safe area P2 based on the motion route history from the last operation.

[0049] Alternatively, hazardous area P1 and safe area P2 can be defined using the following method. For example... Figure 2 As shown, generally, when operator W1 sets the orientation / distance measurement tag 20 on the car 120 and inputs the safety start switch, operator W1 stands at the center of the building side door 210. Then, the distance / orientation estimation unit 34 of the intelligent device 30 measures the distance T1 between the orientation / distance measurement tag 20 and the intelligent device 30 at the start of the operation when operator W1 sets the orientation / distance measurement tag 20. Then, the control unit 32 defines the work area as twice the measured distance T1. Thus, even without inputting information into the intelligent device 30, it is possible to define the danger zone P1 and the safety zone P2.

[0050] In addition, the intelligent device 30 has various sensors, such as an accelerometer, angular velocity sensor, and height sensor (not shown). Based on information from these sensors, the control unit 32 estimates the posture and actions of the operator W1. Then, based on the estimated posture and actions of the operator W1, the control unit 32 determines whether the operator W1 has performed unsafe actions (unsafe actions), such as failing to move their head and check the surrounding safety, or making a large-scale arm extension.

[0051] The alarm unit 37 issues an alarm to operator W1 under the control of the control unit 32. For example, if the control unit 32 determines that operator W1 is performing an unsafe action and is in a dangerous area P1, the control unit 32 controls the alarm unit 37 to issue an alarm to operator W1.

[0052] The wireless communication unit 38 connects to external sales offices and remote monitoring centers 40 via a network. Furthermore, the wireless communication unit 38 sends work results to external sales offices and remote monitoring centers 40, or receives work-related information from external sales offices and remote monitoring centers 40.

[0053] 1-3. Other examples of safe operation management systems

[0054] Next, refer to Figure 5 Here is another example of a safe operation management system.

[0055] Figure 5 This is a block diagram illustrating another example of a control system in a safe work management system. Additionally, regarding... Figure 4 The common parts of the safety operation management system 50 shown are marked with the same symbols and repeated descriptions are omitted.

[0056] exist Figure 5In the safety operation management system 50A shown, the azimuth / distance measuring tag 20A has a distance / azimuth estimation unit 24. Based on information from the antenna control unit 31, the distance / azimuth estimation unit 24 estimates the azimuth and distance of the smart device 30A relative to the azimuth / distance measuring tag 20A. Furthermore, the azimuth / distance measuring tag 20A has a wireless communication unit 25 that transmits and receives information to and from the wireless communication unit 38 provided on the smart device 30A.

[0057] The wireless communication unit 25 sends the result estimated by the distance / direction estimation unit 24 to the wireless communication unit 38 of the smart device 30A. Then, the determination unit 36 ​​of the smart device 30A determines whether the operator W1 is in the danger zone P1 or the safe zone P2 based on the distance / direction estimation result received by the wireless communication unit 38.

[0058] Other structures are the same as those described above. Figure 4 The safety operation management system 50 shown is the same, so its description is omitted.

[0059] 2. Examples of maintenance and repair operations

[0060] Next, refer to Figure 6 An example of maintenance and repair work performed using the aforementioned safety operation management system 50 will be provided.

[0061] Figure 6 This is a flowchart illustrating examples of maintenance and repair operations.

[0062] like Figure 6 As shown, operator W1 moves car 120 to a predetermined position, opening building side door 210 (step S11). Next, operator W1 places orientation / distance measurement tag 20 on the upper part of car 120 (step S12). In this example, as... Figure 2 As shown, an example of installing an orientation / distance measuring tag 20 on the control box 10 of the car located in the car compartment 121 will be described.

[0063] Next, operator W1 activates the orientation / distance measurement tag 20 through the building side door 210 and operates the smart device 30, causing the safety operation management system 50 to perform monitoring processing (monitoring software) (step S13). During step S13, the distance / orientation estimation unit 34 estimates (measures) the orientation and distance of the smart device 30 relative to the orientation / distance measurement tag 20. Then, the determination unit 36, based on the estimation result of the distance / orientation estimation unit 34, determines whether the initial operator's position and orientation are normal (step S14).

[0064] Here, the two directions of the detection area in the orientation / distance measuring tag 20, namely the horizontal direction, are designated as the first direction X and the second direction Y. The first direction X is parallel to the opening and closing direction of the building side door 210. Moreover, the second direction Y is orthogonal to the first orthogonal X and is the direction opposite to the building side door 210 in the shaft 200.

[0065] Moreover, such as Figure 2 As shown, when the orientation / distance measuring label 20 is located at the left corner of the car 120, with the orientation / distance measuring label 20 as the origin, the coordinates on the right side in the first direction X are positive, and the coordinates on the left side are negative. Furthermore, when the orientation / distance measuring label 20 is located at the right corner of the car 120, the coordinates on the left side in the first direction X are positive, and the coordinates on the right side are negative.

[0066] Furthermore, the orientation / distance measuring tag 20 is installed at the corner of the front side of the building side door 210 of the car 120. Therefore, the coordinate of the direction in the second direction Y, which is close to the rear wall 202 of the hoistway 200, is positive, and the coordinate of the direction away from the wall 202 is negative. Additionally, when the orientation / distance measuring tag 20 is installed at the corner of the front side of the rear side of the car 120, the coordinate of the direction in the second direction Y, which is close to the rear wall 202 of the hoistway 200, is negative, and the coordinate of the direction away from the wall 202 is positive.

[0067] However, the orientation / distance measuring tag 20 is preferably positioned at the corner of the front side of the car 120. This allows the operator W1 to extend their arm from the building side door 210 to set the orientation / distance measuring tag 20 without entering the car 120. Consequently, the orientation / distance measuring tag 20 can be set safely.

[0068] In this scenario, assuming the initial operator's position and orientation are correct—that is, the orientation / distance measurement tag 20 is set in the correct position—the coordinates of the smart device 30 relative to the orientation / distance measurement tag 20 are positive in the first direction X and negative in the second direction Y. Conversely, if, for example, the coordinates of the smart device 30 relative to the orientation / distance measurement tag 20 are negative in the first direction X or positive in the second direction Y, it can be determined that the orientation / distance measurement tag 20 is incorrectly set. Therefore, the correct setting position of the orientation / distance measurement tag 20 can be automatically determined.

[0069] Alternatively, a setting guide indicating the orientation of the setting position can be provided on the orientation / distance measuring label 20. The setting guide has a guide indicating the orientation of the first direction X and a guide indicating the orientation of the second direction Y. Then, the operator W1 sets the orientation / distance measuring label 20 along the setting guide provided on the orientation / distance measuring label 20.

[0070] In step S14, if the determination unit 36 ​​determines that the initial operator's position and orientation are abnormal (step S14 "No" determination), the control unit 32 instructs the operator W1 to set the orientation / distance measurement tag 20 at the correct setting position (step S15). Then, the operator W1 returns to step S12 to reset the orientation / distance measurement tag 20.

[0071] In contrast, during the processing of step S14, if the determination unit 36 ​​determines that the initial operator's position and orientation are normal ("Yes" determination in step S14), the control unit 32 performs monitoring processing (monitoring software) (step S16). Furthermore, the setting of hazardous area P1 and safe area P2 is performed before the processing of step S16. Moreover, the set hazardous area P1 and safe area P2 are stored in the data storage unit 35.

[0072] Next, operator W1 rides atop car 120 to begin maintenance and repair work (step S17). That is, after the orientation / distance measurement label 20 is set in the correct position, operator W1 rides atop car 120. Thus, the orientation / distance of operator W1 can be accurately detected by the distance / orientation estimation unit 34, which will be described later.

[0073] Next, based on the information from the tag-side antenna 23 and the operator-side antenna 33 that receive and transmit radio waves, the range / azimuth estimation unit 34 estimates (measures) the azimuth and range of the smart device 30 relative to the azimuth / range measurement tag 20 (step S18).

[0074] As described above, the orientation and distance of the smart device 30 relative to the orientation / distance measurement tag 20 are estimated (measured) wirelessly using the tag-side antenna 23 that receives and transmits radio waves and the operator-side antenna 33. Therefore, the orientation and distance of the operator W1 can be accurately detected. Furthermore, since it uses radio waves wirelessly, the orientation / distance of the operator W1 can be detected without being affected by the brightness within the shaft 200.

[0075] Then, the control unit 32 determines whether the elevator car 120 is in motion (step S19). The determination of whether the car 120 is in motion is based on information from the control panel 190, information from the acceleration sensor and height sensor installed in the smart device 30, etc.

[0076] In step S19, if the control unit 32 determines that the car 120 is not in motion (a "No" determination in step S19), the process proceeds to step S23, which will be described later. Alternatively, if the control unit 32 determines that the car 120 is in motion (a "Yes" determination in step S19), it determines whether operator W1 has not performed any unsafe actions (step S20).

[0077] In step S20, the control unit 32 estimates the posture and actions of the operator W1 based on information from various sensors installed in the smart device 30. Then, based on the estimated posture and actions of the operator W1, the control unit 32 determines whether the operator W1 has not performed any unsafe actions.

[0078] Then, in the process of step S20, if the control unit 32 determines that the operator W1 has not performed an unsafe action (a "No" determination in step S20), the process proceeds to step S23, which will be described later. Alternatively, if the control unit 32 determines that the operator W1 is performing an unsafe action in step S20 (a "Yes" determination in step S20), the process proceeds to step S21.

[0079] In step S21, based on the distance / direction of operator W1 measured in step S18, the determination unit 36 ​​determines whether the position of operator W1 is located in the danger zone P1. That is, the determination unit 36 ​​determines whether the position of the smart device 30 relative to the direction / distance measuring tag 20 is located in the danger zone P1. If, in step S21, the determination unit 36 ​​determines that the position of operator W1 is not in the danger zone P1 (a "No" determination in step S21), the process proceeds to step S23, which will be described later.

[0080] In contrast, during the processing of step S21, if the determination unit 36 ​​determines that the operator W1's position is in the danger zone P1 (a "yes" determination in step S21), the control unit 32 controls the alarm unit 37 to issue an alarm (step S22). This prevents the operator W1 from coming into contact with the rope 130, the counterweight 140, or protrusions on the walls 201 and 202 of the hoistway 200, or from falling from the elevator car 120 during operation. As a result, operational safety is improved.

[0081] In addition, the timing for issuing the alarm is set based on three conditions: whether the car 120 is moving, whether the operator W1 has engaged in unsafe behavior, and whether the operator has entered the danger zone P1, but it is not limited to these. For example, the alarm can be issued when the operator W1 approaches the danger zone P1 or enters the danger zone P1, regardless of whether the car 120 is moving or whether the operator W1 has engaged in unsafe behavior.

[0082] Furthermore, if the process proceeds to step S23, the control unit 32 determines whether the maintenance and repair work on the upper part of the car 120 has been completed. In the process of step S23, if the control unit 32 determines that the maintenance and repair work has not been completed (a "No" determination in step S23), the process returns to step S18.

[0083] In contrast, during the processing of step S23, if the control unit 32 determines that the maintenance and repair work is completed ("Yes" determination in step S23), the control unit 32 terminates the monitoring software (step S24). Next, the operator W1 removes the position / distance measurement tag 20 from the top of the car 120 (step S25). Through this process, the maintenance and repair work using the safety operation management system 50 is completed.

[0084] Furthermore, the present invention is not limited to the embodiments described above and in the accompanying drawings, and various modifications can be made within the scope of the spirit of the invention as described in the claims.

[0085] Furthermore, while the above-described embodiment illustrates the use of the safety operation management system 50 during maintenance and repair work above the car 120, it is not limited to this. For example, the safety operation management system 50 can also be used when a worker W1 is working in the pit, which is the lower part of the hoistway 200. In this case, the orientation / distance measurement tag 20 is provided at least one of the four corners of the pit. Therefore, an alarm can be triggered for the worker W1 when he / she enters a dangerous area P1, such as the area below the counterweight or near various pulleys.

[0086] Furthermore, some or all of the aforementioned components, functions, and processing units can be implemented in hardware, such as through integrated circuit design. Alternatively, the aforementioned components and functions can be implemented in software by a processor interpreting and executing programs that implement each function. The programs, tables, files, and other information implementing each function can be stored in recording devices such as memory, hard disks, SSDs (Solid State Drives), or recording media such as IC cards, SD cards, and DVDs.

[0087] Furthermore, the terms “parallel” and “orthogonal” are used in this specification, but they do not only refer to strict “parallel” and “orthogonal”. They can also refer to a state of “approximately parallel” or “approximately orthogonal” that includes “parallel” and “orthogonal” and is within the range where it can perform its function.

[0088] Symbol Explanation

[0089] 1…Elevator

[0090] 10…Car control box

[0091] 20, 20A… Azimuth / Distance Measurement Labels

[0092] 21…Antenna Control Section

[0093] 22…Control Department

[0094] 23… Tag-side antenna

[0095] 24, 34… Distance / azimuth estimation section

[0096] 25… Wireless Communications Department

[0097] 30, 30A… Smart devices (portable terminals)

[0098] 30A…Smart Devices

[0099] 31…Antenna Control Section

[0100] 32…Control Department

[0101] 33… Operator-side antenna

[0102] 35…Data Storage Department

[0103] 36… Judgment Department

[0104] 37…Alarm Department

[0105] 38… Wireless Communications Department

[0106] 40…Remote Monitoring Center

[0107] 50, 50A…Safety Operation Management System

[0108] 100…traction machine

[0109] 110… shaft

[0110] 120…car

[0111] 121…Car Room

[0112] 130…rope

[0113] 140… counterweight

[0114] 160…machine room

[0115] 190… control panel

[0116] 200… shaft

[0117] 201, 202…wall

[0118] 210…side entrance to the building

[0119] P1… Danger Zone

[0120] P2…Safe Zone

[0121] W1… Operator.

Claims

1. A safety operation management system for elevators, characterized in that, The safe operation management system has the following features: A azimuth / distance measuring tag is installed in the elevator car or shaft and has an antenna on the tag side; The operator-side antenna transmits and receives radio waves in conjunction with the tag-side antenna. A portable terminal, which has the operator-side antenna, is held by the operator; as well as The distance / azimuth estimation unit estimates the azimuth / distance of the portable terminal relative to the azimuth / distance measuring tag based on information from the operator-side antenna or the tag-side antenna.

2. The elevator safety operation management system according to claim 1, characterized in that, The safety operation management system also has: The data storage department stores information on hazardous areas within the car or hoistway; and The determination unit determines whether the portable terminal is in the danger zone based on the orientation / distance of the portable terminal relative to the orientation / distance measuring tag estimated by the distance / orientation estimation unit.

3. The elevator safety operation management system according to claim 2, characterized in that, The safe operation management system also includes an alarm unit, which issues an alarm when the determination unit determines that the portable terminal is in the dangerous area.

4. The elevator safety operation management system according to claim 3, characterized in that, The safety operation management system also includes a control unit, which estimates the operator's posture and movements based on the sensors on the portable terminal. The control unit controls the alarm unit based on the operator's posture and actions, and the judgment of the determination unit.

5. The elevator safety operation management system according to claim 2, characterized in that, The determination unit determines the placement position of the orientation / distance measuring tag based on the orientation / distance of the portable terminal relative to the orientation / distance measuring tag estimated by the distance / orientation estimation unit.

6. A safety management method, characterized in that, It includes the following processes: An azimuth / distance measuring tag with a tag-side antenna is installed inside the elevator car or shaft. Radio waves are transmitted and received via the operator-side antenna and the tag-side antenna on the portable terminal held by the operator. as well as Based on information from the operator-side antenna or the tag-side antenna, the orientation / distance of the portable terminal relative to the orientation / distance measurement tag is estimated.

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