JP2019202867A - Elevator radio communication system - Google Patents

Abstract

To identify a failure of a radio terminal and improve the operation rate of an elevator.SOLUTION: The elevator radio communication system includes a car moving between a plurality of story floors in a hoistway, an elevator control device controlling operation of the car, a plurality of fixed radio terminals that are connected to the elevator control device and separately disposed in the hoistway, a car control unit provided in the car, a car radio terminal that is connected to the car control unit and transmits the radio wave intensity of a radio wave from the fixed radio terminals, and a radio terminal failure detection unit for detecting a radio terminal failure of one of the fixed radio terminals and the car radio terminal based on the radio wave intensity.SELECTED DRAWING: Figure 2

Description

  Embodiments described herein relate generally to an elevator radio communication system.

  The elevator transmits a control signal for controlling opening / closing of a car door, a car call signal output in response to pressing of a destination floor button provided in the car, and the like between the elevator control device and the car. . The transmission of control signals between the elevator control device and the car is generally performed via a tail cord that connects the elevator control device and the car.

  However, in high-rise buildings and the like, high-speed elevators are required, and elevator elevators have a long distance. In this case, since it is necessary to lengthen the tail cord, the weight of the tail cord increases. The increase in the weight of the tail cord is disadvantageous for high-speed lifting, and it is necessary to increase the driving force of the hoist that moves the car up and down. In addition, if the tail cord is long, there is a high possibility that the tail cord is cut by the protrusions in the hoistway due to the shaking at the time of the earthquake.

  For this reason, a mechanism for wirelessly transmitting control signals between the elevator controller and the car without using a tail cord is desired (for example, Patent Document 1). Such an elevator radio transmission system is configured to perform radio communication between a radio terminal installed in a car and a radio terminal installed in a hoistway at regular intervals, and to perform elevator control by this radio communication.

  However, if wireless communication between the elevator control device and the car is interrupted due to a failure of the wireless terminal, the car cannot be controlled, and it is necessary to stop the operation of the elevator.

JP-A-2006-115636

  This invention is made | formed by the above-mentioned situation, and makes it a subject to improve the operation rate of an elevator while specifying the failure of a radio | wireless terminal.

  In order to achieve the above object, the elevator radio communication system of the present embodiment is connected to an elevator control device that controls the operation of a car, a car that moves between a plurality of floors in a hoistway, and an elevator control device. , A plurality of fixed wireless terminals arranged in the hoistway, a car control unit provided in the car, and a car radio terminal connected to the car control unit and transmitting the radio wave intensity of the radio waves from the fixed radio terminal And a wireless terminal failure detection unit that detects a wireless terminal failure of either the fixed wireless terminal or the car wireless terminal based on the radio field intensity.

The block diagram of the elevator radio | wireless communications system in embodiment. The block diagram of the elevator radio | wireless communications system in 1st Embodiment. Explanatory drawing of the communication range of each radio | wireless terminal. An example of a control frame transmitted from the elevator control device to the car control unit. An example of a response frame transmitted from the car control unit to the elevator control device. The flowchart which shows the control and the response operation performed between an elevator control apparatus and a cage | basket | car. The table of the radio | wireless terminal failure determination in 1st Embodiment. 6 is a flowchart illustrating a radio terminal failure detection operation according to the first embodiment. The block diagram of the elevator radio | wireless communications system in 2nd Embodiment. The table of the radio | wireless terminal failure determination in 2nd Embodiment. The flowchart figure which shows the detection operation of the radio | wireless failure terminal in 2nd Embodiment. The flowchart which shows the radio | wireless terminal failure diagnosis exclusive driving | operation in 3rd Embodiment. Explanatory drawing of the communication range of each radio | wireless terminal at the time of detecting the fixed radio | wireless terminal failure in 4th Embodiment.

  Hereinafter, embodiments will be described in detail with reference to the drawings. In the following description, components having substantially the same function and configuration are denoted by the same reference numerals, and redundant description will be given only when necessary.

  FIG. 1 is a configuration diagram of an elevator radio communication system in the embodiment. As shown in FIG. 1, an elevator on which an elevator radio communication system is mounted has a machine room 1a and a hoistway 1b. In the machine room 1a, an elevator control device 10 for controlling the elevator and a hoisting machine 21 are installed. Has been. The car 20 moves up and down in the hoistway 1b based on the control of the elevator control device 10. A main rope 23 having one end connected to the car 20 and the other end connected to a counterweight 22 is wound around the hoisting machine 21. The car 20 moves up and down in the hoistway 1b by driving the main rope 23 of the hoisting machine 21 based on the control of the elevator control device 10.

  Fixed wireless terminals 40 a to 40 e are provided apart from each other in the hoistway 1 b, and are connected to the elevator control device 10 by a wire 24. A car control unit 30 and a car radio terminal 41 are provided in the upper part of the car 20, and the car control unit 30 and the car radio terminal 41 are connected by wire (not shown). The elevator control device 10 and the car control unit 30 transmit control signals by wireless communication between the fixed wireless terminals 40a to 40e and the car wireless terminal 41.

  Although this embodiment has a larger effect when applied to a high-rise building, the height of the hoistway 1b is assumed to be the height from the first floor to the fifth floor for explanation. A hole position where the car 20 is landed is indicated by a dotted line and is 1F to 5F. Further, the number of fixed wireless terminals 40a to 40e is irrelevant in principle to the number of landing floors. Further, the arrangement positions of the fixed wireless terminals 40a to 40e and the arrangement intervals in the direction along the hoistway 1b are individually considered in consideration of the communication capability of each fixed radio terminal 40a to 40e, the radio wave environment in the hoistway 1b, and the like. It is determined. However, in the embodiment in which the fixed radio terminals 40a to 40e are used to control the hall call button (not shown) installed in each hall by car communication and wireless communication simultaneously with the car control, An embodiment in which the fixed wireless terminals 40a to 40e are installed is also conceivable.

(First embodiment)
FIG. 2 is a block diagram of the elevator radio communication system in the first embodiment. The elevator control device 10 includes an operation control unit 11, a wireless communication control unit 12, a wireless terminal failure detection unit 13, and a system data storage unit 14 in order to execute a series of processes related to elevator operation control.

  The operation control unit 11 executes processing related to the overall operation control of the elevator. In the present embodiment, the operation control unit 11 controls the car 20 by wireless communication. Fixed wireless terminals 40a to 40e arranged in the hoistway 1b are wired to the wireless communication control unit 12 that controls wireless communication. The wireless terminal failure detection unit 13 detects performance deterioration / failure of the fixed wireless terminals 40a to 40e. Specifically, the failure of the wireless terminal is detected from the reception level indicating the radio wave intensity of the radio wave received by each of the fixed wireless terminals 40a to 40e and the car wireless terminal 41. The system data storage unit 14 stores an elevator control program and a database necessary for elevator control, and the operation control unit 11 inputs and outputs necessary programs and control data.

  The car 20 includes a car control unit 30, a car radio terminal 41, and a car data storage unit 31. The car control unit 30 performs the car control that has been conventionally performed by the tail cord by wireless communication. The car wireless terminal 41 performs wireless communication with the fixed wireless terminals 40a to 40e, and the car data storage unit 31 temporarily stores control data or acquired data such as a reception level temporarily.

  FIG. 3 is an explanatory diagram of the communication range of each wireless terminal. The car radio terminal 41 arranged in the car 20 moves up and down along Z-Z 'in the hoistway 1b. Here, the communication ranges FR1 to FR5 are the communication ranges of the fixed wireless terminals 40a to 40e so that the car wireless terminal 41 can always receive a wireless signal from any of the fixed wireless terminals 40a to 40e. And When the car 20 moves up and down from the top floor 5F to the bottom floor 1F, the transmission of each fixed wireless terminal 40a to 40e so that the car wireless terminal 41 is included in at least one communication range of the communication ranges FR1 to FR5 Output is set. In the example of FIG. 3, the transmission output of each of the fixed wireless terminals 40 a to 40 e is set so that the car wireless terminal 41 always enters one or two communication ranges as the car 20 moves up and down.

  In addition, the communication range of the car radio terminal 41 that allows any of the fixed radio terminals 40a to 40e to always receive a radio signal from the car radio terminal 41 is defined as a communication range CR. When the car 20 moves up and down from the top floor 5F to the bottom floor 1F, the transmission output of the car radio terminal 41 so that one of the fixed radio terminals 40a to 40e is included in the communication range CR of the car radio terminal 41 Is set.

  The car radio terminal 41 can communicate with any of the fixed radio terminals 40a to 40e even if the car radio terminal 41 moves up and down between the top floor and the bottom floor. Here, when the car radio terminal 41 moves up and down, a position range that is in the communication ranges FR1 to FR5 of the fixed radio terminals 40a to 40e and is on ZZ ′ is defined as a car range, and each car range CP1. ~ CP5.

  FIG. 4 is an example of a control frame transmitted from the elevator control device 10 to the car control unit 30, and FIG. 5 is an example of a response frame transmitted from the car control unit 30 to the elevator control device 10. There is a concern that the frequency of disconnecting the communication link is higher in the car control by wireless communication than in the wired car control by the tail cord. Therefore, in the present embodiment, polling control is performed in which the elevator control device 10 periodically inquires the car control unit 30 and confirms by a response whether the car control unit 30 has processed a control command from the elevator control device 10. It will be described as being performed. However, the wireless communication standard to be applied is not limited.

  FIG. 4A is an example of a control frame for transmitting a control command from the elevator control device 10 to the car control unit 30. It consists of a transmission source address that identifies one of the fixed wireless terminals 40a to 40e that transmits a control command to the car 20, the at least one control command, and control data for the control command. If control data is unnecessary, this control data field may be omitted or a NULL value may be used.

  The source address only needs to be able to uniquely identify the fixed wireless terminals 40a to 40e, and may be matched with an identifier registered and used in the elevator control system in addition to the MAC address and the IP address.

  The control commands for the car 20 include opening / closing the car door, checking the call signal, turning on / off the button on the destination floor, and displaying the floor number of the car. As shown in FIG. 4B, the elevator control device 10 periodically inquires the car control unit 30 even when a specific control command for the car is not generated. For example, in the car 20, it is confirmed whether or not a call signal such as a press of a destination floor button by a passenger is generated, and whether the car 20 including the car wireless terminal 41 is operating normally (keep alive). ) Or an inquiry about the reception level of the radio field intensity transmitted by the car radio terminal 41 can be made. For example, in the control frame of FIG. 4C, a control command for opening the car door is transmitted, and an inquiry about the reception level of the radio wave intensity transmitted by the car radio terminal 41 described in the transmission source address is performed. it can. Note that FCS is a frame check sequence for performing error detection and error correction.

  FIG. 5A shows an example of a response frame to the control command. The response frame includes a transmission destination address for returning to the fixed wireless terminal 40 that transmitted the control frame, a response to at least one control command, and response data for the control response. When the response data is unnecessary, this response data field may be omitted or a NULL value may be used.

  In the example of FIG. 5B, in response to the inquiry about the reception level from the car radio terminal 41, in addition to the control response to the inquiry, the fact that the reception level at the car radio terminal 41 is Pr is returned to the elevator controller 10. To do. The example of FIG. 5 (c) is a control response corresponding to FIG. 4 (c), and the elevator control device 10 indicates that the door opening execution of the car door is completed and the reception level at the car radio terminal 41 is Pr. Return to

  FIG. 6 is a flowchart showing a control response operation performed between the elevator control device 10 and the car 20. Here, as shown in FIGS. 4B and 4C, a control frame including a reception level inquiry in the car radio terminal 41 will be described.

  First, in step S <b> 11, the elevator control device 10 transmits a control frame to the car control unit 30. In step S12, the car control unit 30 receives a control frame. In step S <b> 13, the source address representing the fixed wireless terminals 40 a to 40 e is extracted from the received control frame and temporarily stored in the car data storage unit 31. Then, control is executed based on the control command. In the case of the control frame of FIG. 4C, the car 20 is opened and the reception level Pr of the car radio terminal 41 is stored in the car data storage unit 31 together with a time stamp. In step S14, the car control unit 30 returns the door opening completion and the reception level Pr to the elevator control device 10 in a response frame shown in FIG.

  In step S12, when the car control unit 30 cannot receive the control frame, the elevator control device 10 performs retransmission within a predetermined timeout value. The inquiry about the reception level is preferably performed when the car 20 is stopped, that is, when the car is landing in the hall. When the car 20 is moved up and down, since it is necessary to return a response frame while the car 20 is within the same car range CP, a real-time property is required as compared with when the car 20 is stopped. In this embodiment, the reception level inquiry is made when landing in the hall.

  FIG. 7 is an example of a wireless terminal failure determination table stored in the system data storage unit 14. The wireless terminal failure determination table includes fields such as the stop hall floor of the car 20, the car range, the fixed wireless terminal, and the radio field intensity range of the fixed wireless terminal. For example, if the car reception level Pr of the car wireless terminal 41 is within the P3max from the radio wave intensity range P3min when stopping at the hall 3F, it is normal. If it is outside the range, the wireless terminal is faulty or poorly adjusted.

  FIG. 8 is a flowchart showing a wireless terminal failure detection operation performed by the wireless terminal failure detection unit 13. This flow is performed following the flow of FIG. In step S <b> 15, the elevator control device 10 receives a response frame from the car control unit 30. The completion of door opening and the reception level Pr are extracted from the response frame. In step S16, it is determined using the table of FIG. 7 whether the reception level Pr is within a predetermined value range. If the reception level Pr is within the predetermined value range (S16: Yes), it is determined as normal and the flow ends.

  If the reception level Pr is outside the predetermined value range (S16: No), the fixed wireless terminal 40 that has communicated with the car control unit 30 is identified from the transmission destination address in the response frame, and the transmission of this fixed wireless terminal 40 is performed. It is determined that the output level has deteriorated. In this case, it is presumed that communication is impossible in a partial area of the car range, and therefore other control may not be possible. For this reason, in step S17, it is determined that the fixed wireless terminal 40 having the transmission destination address is characteristic deteriorated or malfunctioned, and the operation is temporarily stopped.

  Thereafter, the control frame attempts to increase the transmission output of the fixed wireless terminal 40 that is determined to have characteristic degradation or failure. When the reception level of the car radio terminal 41 becomes normal, the operation is resumed. The case where the transmission output of the fixed wireless terminal 40 cannot be increased will be described later.

  There may be a failure of the car wireless terminal 41 instead of a failure of the fixed wireless terminal 40. In this case, the elevator control device may acquire the radio reception level output from the car radio terminal 41 from each of the fixed radio terminals 40a to 40e and determine whether or not the reception level is normal.

  As described above, according to the first embodiment, the characteristics of the fixed wireless terminals 40a to 40e are notified by notifying the elevator controller 10 of the reception level at the car wireless terminal 41 in accordance with the inquiry from the elevator controller 10. It is possible to detect deterioration / failure at an early stage so that there is no area incapable of communication over the entire hoistway 1b. Thereby, the operation rate of an elevator can be improved.

  Moreover, since the transmission output of the fixed wireless terminals 40a to 40e can be set to an optimum radio wave intensity, the radio wave environment in the hoistway 1b can be made uniform. This makes it possible to perform elevator control that suppresses radio wave interference between wireless terminals and does not consume useless power.

(Second Embodiment)
FIG. 9 is a block diagram of an elevator radio communication system according to the second embodiment. In addition to the configuration of the first embodiment, the elevator control device 10 includes a car position detection unit 15 that detects a detailed car position based on an output pulse value of a motor PG (Pulse Generator) 50. Further, the wireless terminal failure detection unit 13 includes a counter 16 that counts up the number of failures.

  As in the first embodiment, the wireless terminal failure detection unit 13 acquires the reception level in the car wireless terminal 41 from the response frame and detects the wireless terminal failure. In this embodiment, the wireless terminal failure detection unit further 13 records the detailed car position detected by the car position detection unit 15 when a wireless terminal failure is detected, and indicates any failure of the fixed wireless terminals 40a to 40e or the car wireless terminal 41 according to the car position. To detect. As a result, the reception level can be inquired even when the car 20 is moving up and down.

  FIG. 10 is a wireless terminal failure determination table according to the second embodiment. The car position detector 15 detects the car position on Z-Z 'in the hoistway 1b shown in FIG. 3 according to the pulse value of the motor PG50. In FIG. 10, for example, each car range and CP1 to CP5 are divided into three, and the entire hoistway 1b is divided into 15 car positions Z1 to Z15. For each car position Z1 to Z15, the optimum radio field intensity range of the fixed wireless terminals 40a to 40e is defined.

  The number of divisions in each car range is arbitrarily determined from the number of fixed wireless terminals 40, the transmission output, the ascending / descending speed of the car 20, and the like. That is, in an elevator such as a high-rise building, since the ascending / descending speed is fast such as non-stop operation to the top floor, an operation in which the number of fixed wireless terminals 40 is less than the hall floor and the transmission output is increased can be considered. Accordingly, it is necessary to inquire about the reception level even when the car 20 is moving up and down.

  Since the inquiry about the reception level requires real-time property, it appears that the car 20 exists in the same car position Z within the time until the moving car 20 transmits a control frame and the response frame is returned. Is divided into

  FIG. 11 is a flowchart showing a detection operation of a radio failure terminal. In this embodiment, a fixed wireless terminal failure and a car wireless terminal failure are distinguished and detected.

  In step S <b> 21, the wireless terminal failure detection unit 13 determines a wireless terminal failure based on the radio wave intensity range defined at the car position Z at which the reception level inquiry is performed. If it is determined that there is no wireless terminal failure (S21: No), the flow ends. If it is determined that the wireless terminal has failed (S21: Yes), the process proceeds to step S22, where the car range CP is recorded, and the number of times of failure detection in the car range CP is counted up by the counter 16. The car range CP and preferably further detailed car positions in the car range CP are acquired and recorded from the car position detection unit 15, and the number of times of failure detection is counted up separately for each of the car ranges CP1 to CP5.

  Considering momentary disconnection of communication links, fluctuations in communication environment, and the like, a failure determination is made not by performing a final wireless terminal failure determination by a single determination but by a plurality of failure detection times. In step S23, when a wireless terminal failure is detected a plurality of times in a plurality of car ranges (S23: Yes), it is determined that the car wireless terminal 41 has failed (step S26).

  If no failure is detected in a plurality of car ranges (S23: No) and the number of times of failure detection is greater than or equal to a set value in a specific car range CP (S24: Yes), in step S25, the specific car range is supported. It detects that the fixed wireless terminal 40 is out of order.

  As described above, according to the second embodiment, which of the plurality of fixed wireless terminals has failed by detecting the position of the car when detecting a wireless terminal failure and recording the car range. Can be accurately identified. In addition, it is possible to identify a failure on the car radio terminal side by detecting failures continuously instead of only at a specific car position. Further, it is possible to determine a failure even when the car 20 moves up and down at high speed.

(Third embodiment)
FIG. 12 is a flowchart showing the operation of the dedicated radio terminal failure diagnosis operation in the third embodiment. The configuration of the elevator radio communication system is the same as that of the second embodiment. This wireless terminal failure diagnosis-dedicated operation is performed at a time when there are few elevator users such as at night. In FIG. 10, the car is sequentially moved to all car ranges CP1 to CP5, and test transmission is performed to inquire the reception level at the moved position.

  First, in step S31, the car 20 is moved to the position of the car range CP1 corresponding to the fixed wireless terminal 40a on the top floor (5F in FIG. 3). In step S32, test transmission for inquiring the reception level is performed using the control frame in FIG. 4B and the response frame in FIG. 5B. At this time, the normal radio wave intensity range (predetermined range) for the car position is read from the system data storage unit 14. In step S33, it is determined whether the reception level at the car radio terminal 41 is within this predetermined range. If the reception level at the car radio terminal 41 is outside the predetermined range (S33: No), the process proceeds to step S40, moves to the car range CP of the next fixed radio terminal 40, and proceeds to step S32. Return. If the reception level at the car radio terminal 41 is within a predetermined range (S33: Yes), the process proceeds to step S34, and the car is moved to the position of the car range CP corresponding to the next fixed radio terminal 40.

  In step S35, as in step S32, test transmission for inquiring the reception level is performed. At this time, the normal radio wave intensity range (predetermined range) for the car position is read from the system data storage unit 14. In step S36, it is determined whether the reception level at the car radio terminal 41 is within this predetermined range. If the reception level at the car radio terminal 41 is a radio field intensity outside the predetermined range (S36: No), the process proceeds to step S38, and the failure of the fixed radio terminal 40 in the car range CP where the car 20 is located. judge. In step S39, when the test transmission is not performed for all the fixed wireless terminals 40a to 40e (car ranges CP1 to CP5), the mobile station moves to the car range CP of the next fixed wireless terminal (step S40). Return to S32.

  In step S36, if the reception level at the car radio terminal 41 is within a predetermined range (S36: Yes), the process proceeds to step S37, where it is determined that the car radio terminal 41 is out of order. In step S39, when the test transmission of the fixed wireless terminal 40e located in the car range CP5 is completed (S39: Yes), the wireless terminal failure diagnosis dedicated operation ends.

  Although the above flowchart is an example of the test transmission of the fixed wireless terminal on the top floor, it may be performed from the bottom floor.

  Further, the failure determination of the car radio terminal 41 is performed when the car 20 is moved to the next car range, and the reception level at the car radio terminal 41 becomes a radio field intensity outside the predetermined range twice in succession. However, the position of the car radio terminal 41 may be moved, and the failure determination may be performed when the reception level at the car radio terminal 41 becomes a radio wave intensity outside a predetermined range three times or more continuously.

  As described above, according to the third embodiment, it is possible to improve the detection accuracy of a wireless terminal failure by performing the dedicated operation for wireless terminal failure diagnosis in a time zone where the number of elevator users is small.

(Fourth embodiment)
FIG. 13 is an explanatory diagram of the communication range of each wireless terminal when the fixed wireless terminal fails in the fourth embodiment. FIG. 13 shows an example when the fixed wireless terminal 40c fails. When a failure of the fixed wireless terminal 40c is detected, the outputs of the fixed wireless terminals 40b and 40d adjacent to the fixed wireless terminal 40c are increased. In the figure, a range in which radio waves reach around the fixed radio terminal 40 is indicated by a dotted circle.

  When transmitting from the car radio terminal 41, the output of the car radio terminal 41 is increased so that radio waves reach the fixed radio terminal 40b or 40d. In the figure, it is indicated by a two-dot chain circle.

  The elevator control device 10 reads out a predetermined value of the radio wave intensity range defined at the time of failure from the system data storage unit 14, and performs control so as to increase the outputs of the fixed wireless terminals 40b and 40d adjacent to the failed fixed wireless terminal 40c. As for the wireless output of the car wireless terminal 41, the car 20 is temporarily moved to a communicable car range, and the wireless output is increased by the control / response frames shown in FIGS.

  Furthermore, since the overlapping car range CP is generated by increasing the outputs of the fixed wireless terminals 40b and 40d, the transmission outputs of the fixed wireless terminals 40a and 40e may be decreased. In FIG. 11, the radio wave intensity is indicated by a circle having no directivity, but each wireless terminal may be provided with directivity.

  As described above, according to the fourth embodiment, when a specific fixed wireless terminal fails, the operation of the elevator is continued by increasing the output of the wireless terminal so as to cover the range of the fixed wireless terminal. It becomes possible to do.

  As described above, according to the embodiment, it is possible to transmit the control signal between the elevator control device and the car with high reliability without using a tail cord.

  In addition, although several embodiment of this invention was described, these embodiment is shown as an example and is not intending limiting the range of invention. The novel embodiment can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. This embodiment and its modifications 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 1a ... Machine room 1b ... Hoistway 10 ... Elevator control apparatus 11 ... Operation control part 12 ... Wireless communication control part 13 ... Wireless terminal failure detection part 14 ... System data storage part 20 ... Car 21 ... Hoisting machine 22 ... Counterweight 23 ... main rope 30 ... car control unit 40 ... fixed radio terminal 41 ... car radio terminal

In order to achieve the above object, the elevator radio communication system of the present embodiment is connected to an elevator control device that controls the operation of a car, a car that moves between a plurality of floors in a hoistway, and an elevator control device. , A plurality of fixed wireless terminals arranged in the hoistway, a car control unit provided in the car, and a car radio terminal connected to the car control unit and transmitting the radio wave intensity of the radio waves from the fixed radio terminal And a wireless terminal failure detecting unit that detects a wireless terminal failure of either the fixed wireless terminal or the car wireless terminal based on the radio field intensity, and a car position detecting unit that detects the position of the car in the hoistway .
The wireless terminal failure detection unit specifies a car range corresponding to each communication range of the fixed wireless terminal based on the position of the car when the wireless terminal failure is detected, and the wireless terminal is a predetermined number of times or more in the specified car range. When a failure is detected, it is determined that the fixed wireless terminal located in the specified car range has failed.

Claims (5)

Whether to move between multiple floors in the hoistway,
An elevator control device for controlling the operation of the car;
A plurality of fixed wireless terminals connected to the elevator control device and spaced apart in the hoistway;
A car control unit provided in the car;
A car radio terminal connected to the car control unit and transmitting the radio field intensity of the radio wave from the fixed radio terminal;
A wireless terminal failure detection unit that detects a wireless terminal failure of either the fixed wireless terminal or the car wireless terminal based on the radio field intensity;
An elevator wireless communication system. A car position detector for detecting the position of the car in the hoistway;
The wireless terminal failure detection unit specifies a car range corresponding to each communication range of the fixed wireless terminal based on the position of the car when the wireless terminal failure is detected, and is predetermined in the specified car range. 2. The elevator radio communication system according to claim 1, wherein the fixed radio terminal located in the specified car range is determined to be faulty when the radio terminal fault is detected at least the number of times.   When the car is continuously moved to the car range corresponding to each communication range of the fixed wireless terminal, and the wireless terminal failure detection unit detects the wireless terminal failure in at least two consecutive car ranges, The elevator radio communication system according to claim 1, wherein it is determined that the car radio terminal is out of order.   The elevator radio communication according to claim 2 or 3, wherein the car is moved to the car range corresponding to a communication range of the specific fixed wireless terminal, and communication between the specific fixed wireless terminal and the car wireless terminal is performed. system.   When the wireless terminal failure detection unit determines that the fixed wireless terminal has failed, the failure is detected when the car is located in the car range corresponding to the failed fixed wireless terminal determined to have failed. 5. The radio output of the fixed wireless terminal adjacent to the failed fixed wireless terminal is increased to a level at which the fixed wireless terminal adjacent to the fixed wireless terminal can communicate with the car wireless terminal. The elevator radio communication system described in 1.

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