JP6657298B2 - Elevator wireless communication system - Google Patents

Description

  Embodiments of the present invention relate to an elevator wireless communication system.

  The elevator transmits a control signal for controlling opening and 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 a control signal between the elevator control device and the car is generally performed via a tail cord connecting the elevator control device and the car.

  However, a high-rise building or the like requires high-speed elevating and lowering, and the elevating and lowering process of the elevator takes a long distance. In this case, it is necessary to lengthen the tail cord, so that the weight of the tail cord increases. Increasing the weight of the tail cord is disadvantageous for high-speed lifting and lowering, 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, the possibility that the tail cord is cut by a protrusion in the hoistway due to shaking during the occurrence of an earthquake increases.

  Therefore, a mechanism for wirelessly transmitting a control signal between an elevator control device and a car without using a tail code has been desired (for example, Patent Document 1). Such an elevator wireless transmission system has a configuration in which wireless communication is performed between a wireless terminal installed in a car and a wireless terminal installed in a hoistway at regular intervals, and elevator control is performed by this wireless 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

  The present invention has been made in view of the above circumstances, and it is an object of the present invention to identify a failure of a wireless terminal and to improve the operating rate of an elevator.

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 spaced apart in a hoistway, a car control unit provided in the car, and a car wireless terminal connected to the car control unit and transmitting radio wave intensity of radio waves from the fixed wireless terminal And a radio terminal failure detection unit that detects a radio terminal failure of one of the fixed radio terminal and the car radio terminal based on the radio wave intensity, and a car position detection unit that detects the position of the car on the hoistway .
The wireless terminal failure detection unit identifies a car range corresponding to each communication range of the fixed wireless terminal based on the position of the car at the time of detecting the wireless terminal failure, and the wireless terminal When a failure is detected, it is determined that the fixed wireless terminal located in the specified car range has failed.

FIG. 1 is a configuration diagram of an elevator radio communication system according to an embodiment. 1 is a block diagram of an elevator wireless communication system according to a first embodiment. FIG. 4 is an explanatory diagram of a communication range of each wireless terminal. 4 is an example of a control frame transmitted from an elevator control device to a car control unit. 5 is an example of a response frame transmitted from the car control unit to the elevator control device. 9 is a flowchart showing a control / response operation performed between the elevator control device and the car. 4 is a table for wireless terminal failure determination according to the first embodiment. 5 is a flowchart illustrating an operation of detecting a wireless terminal failure according to the first embodiment. FIG. 9 is a block diagram of an elevator wireless communication system according to a second embodiment. 9 is a table for wireless terminal failure determination according to the second embodiment. FIG. 9 is a flowchart illustrating an operation of detecting a wirelessly failed terminal according to the second embodiment. 9 is a flowchart illustrating a dedicated operation of the wireless terminal failure diagnosis according to the third embodiment. FIG. 14 is an explanatory diagram of a communication range of each wireless terminal when a fixed wireless terminal failure is detected in the fourth embodiment.

  Hereinafter, embodiments will be described in detail with reference to the drawings. In the following description, components having substantially the same functions and configurations are denoted by the same reference numerals, and repeated description will be made only when necessary.

  FIG. 1 is a configuration diagram of the elevator radio communication system according to the embodiment. As shown in FIG. 1, the elevator in which the 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 hoist 21 are installed. Have 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 the counterweight 22 is wound around the hoisting machine 21. By driving the main rope 23 of the hoisting machine 21 based on the control of the elevator control device 10, the car 20 moves up and down in the hoistway 1b.

  Fixed wireless terminals 40a to 40e are provided separately from each other on the hoistway 1b, and are connected to the elevator control device 10 by a wire 24. A car control unit 30 and a car wireless terminal 41 are provided above the car 20, and the car control unit 30 and the car wireless terminal 41 are connected by wire (not shown). The control signals are transmitted to the elevator control device 10 and the car control unit 30 by wireless communication between the fixed wireless terminals 40 a to 40 e and the car wireless terminal 41.

  The present embodiment has a greater effect when applied to a high-rise building, but for the sake of explanation, the height of the hoistway 1b is set to the height from the first floor to the fifth floor. The positions of the halls where the cars 20 land are indicated by dotted lines, and are designated as 1F to 5F. In addition, the number of fixed wireless terminals 40a to 40e is basically irrelevant to the number of landing floors. The arrangement positions of the fixed wireless terminals 40a to 40e and the arrangement intervals in the direction along the hoistway 1b are individually determined in consideration of the communication performance of each fixed wireless terminal 40a to 40e, the radio wave environment in the hoistway 1b, and the like. It is determined. However, in an embodiment in which the fixed wireless terminals 40a to 40e are used to control a hall call button (not shown) or the like installed in each hall by car communication and radio communication at the same time, the vicinity of each hall is 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 according to 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 to execute a series of processes related to elevator operation control.

  The operation control unit 11 executes processing relating to overall elevator operation control. In the present embodiment, the operation control unit 11 controls the car 20 by wireless communication. Fixed wireless terminals 40a to 40e arranged on the hoistway 1b are connected to the wireless communication control unit 12 that controls wireless communication by wire. The wireless terminal failure detection unit 13 detects performance degradation and failure of the fixed wireless terminals 40a to 40e. Specifically, a 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 required for elevator control, and the operation control unit 11 inputs and outputs necessary programs and control data.

  The car 20 has a car control unit 30, a car wireless terminal 41, and a car data storage unit 31. The car control unit 30 performs car control by radio communication, which has been conventionally performed by a tail code. 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 mainly control data or acquired data such as a reception level.

  FIG. 3 is an explanatory diagram of a communication range of each wireless terminal. The car wireless terminal 41 arranged in the car 20 moves up and down along Z-Z 'in the hoistway 1b. Here, the communication range of each of the fixed wireless terminals 40a to 40e is set to the communication range FR1 to FR5 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 transmissions of the fixed radio terminals 40a to 40e are performed so that the car radio terminal 41 is included in at least one of the communication ranges FR1 to FR5. Output is set. In the example of FIG. 3, the transmission outputs of the fixed wireless terminals 40a to 40e are set such that the car wireless terminal 41 always enters one or two communication ranges as the car 20 moves up and down.

  The communication range of the car radio terminal 41 is such that any of the fixed radio terminals 40a to 40e can always receive the radio signal from the car radio terminal 41. 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 is set so that any 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 wireless terminal 41 moves up and down, a position range that is in the communication range FR1 to FR5 of the fixed wireless terminals 40a to 40e and that is on ZZ ′ is defined as a car range, and the car range CP1 is defined. To 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 disconnection of the communication link is higher in car control by wireless communication than in wired car control by tail code. For this reason, in the present embodiment, polling control for periodically inquiring from the elevator control device 10 to the car control unit 30 and confirming by response whether the car control unit 30 has processed the control command from the elevator control device 10 is performed. It will be described as what is 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 is composed of a transmission source address for identifying one of the fixed wireless terminals 40a to 40e that transmit a control command to the car 20 side, at least one or more control commands, and control data for the control commands. If the control data is unnecessary, the control data field may not be provided, or may be a NULL value.

  The transmission source address may be any address that can uniquely identify the fixed wireless terminals 40a to 40e, and may be a MAC address or an IP address, or an address that matches an identifier registered and used in the elevator control system.

  The control commands for the car 20 include opening and closing of a car door, confirmation of a call signal, turning on / off of a button on a destination floor, display of the floor number of a car, and the like. As shown in FIG. 4B, the elevator control device 10 periodically inquires the car control unit 30 even when no specific control command has been issued to the car. For example, in the car 20, a state check such as whether or not a call signal such as pressing of a destination floor button by a passenger is generated, and whether the operation of the car 20 including the car wireless terminal 41 is normal (keep-alive) ), Or an inquiry about the reception level of the radio wave intensity transmitted by the car radio terminal 41 can be made. For example, in the control frame of FIG. 4C, a control command to open the car door is transmitted, and an inquiry about the reception level of the radio wave intensity transmitted by the car wireless 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 destination address for returning the control frame to the fixed wireless terminal 40 that has transmitted the control frame, a response to at least one or more control commands, and response data to the control response. When the response data is unnecessary, the field of the response data may be omitted or may be a NULL value.

  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 control device 10. I do. The example in FIG. 5C is a control response corresponding to FIG. 4C. The elevator control device 10 confirms that the execution of the door opening of the car door has been completed and the reception level at the car radio terminal 41 is Pr. Return to

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

  First, in step S11, the elevator control device 10 transmits a control frame to the car control unit 30. In step S12, the car control unit 30 receives the control frame. In step S13, the source addresses representing the fixed wireless terminals 40a to 40e are 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 in FIG. 4C, the door of 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 the time stamp. Then, in step S14, the car control unit 30 returns the completion of the door opening and the reception level Pr to the destination address in the response frame illustrated 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. It is preferable that the inquiry about the reception level be made when the car 20 is stopped, that is, when the car 20 is landing in the hall. When the car 20 is moved up and down, it is necessary to return a response frame while the car 20 is within the same car range CP. In the present embodiment, the inquiry about the reception level is performed at the time of landing on the hall.

  FIG. 7 is an example of a wireless terminal failure determination table stored in the system data storage unit 14. The radio terminal failure determination table has fields such as a stop hall floor of the car 20, a car range, a fixed radio terminal, and a radio field intensity range of the fixed radio terminal. For example, if the reception level Pr of the car radio terminal 41 is within the radio field intensity range P3min to P3max when the car is stopped at the hall 3F, it indicates that the car radio terminal 41 is normal. If the range is out of the range, the wireless terminal is out of order or is out of adjustment.

  FIG. 8 is a flowchart illustrating 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 S15, 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 whether or not the reception level Pr is within a predetermined value range by using the table of FIG. If the reception level Pr is within the predetermined value range (S16: Yes), it is determined to be normal, and the flow ends.

  If the reception level Pr is out of the predetermined value range (S16: No), the fixed wireless terminal 40 that has communicated with the car control unit 30 is specified from the destination address in the response frame, and the transmission of the fixed wireless terminal 40 is performed. It is determined that the output level has deteriorated. In this case, since it is presumed that communication is not possible in a part of the car range, other controls may not be performed. Therefore, in step S17, the fixed wireless terminal 40 having the transmission destination address is determined to have deteriorated characteristics or has failed, and the operation is temporarily stopped.

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

  It should be noted that the failure may not be the failure of the fixed wireless terminal 40 but the failure of the car wireless terminal 41. 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 the reception level is normal.

  As described above, according to the first embodiment, the characteristics of the fixed radio terminals 40a to 40e are notified by notifying the elevator control device 10 of the reception level at the car radio terminal 41 in accordance with the inquiry from the elevator control device 10. Deterioration / failure can be detected early so that there is no area in which communication is not possible over the entire area of the hoistway 1b. Thereby, the operating rate of the elevator can be improved.

  Further, since the transmission outputs of the fixed wireless terminals 40a to 40e can be set to the optimum radio wave intensity, the radio wave environment in the hoistway 1b can be made uniform. As a result, elevator control that suppresses radio interference between wireless terminals and consumes no useless power becomes possible.

(Second embodiment)
FIG. 9 is a block diagram of the 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. 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 detecting unit 13 detects the wireless terminal failure by acquiring the reception level at the car wireless terminal 41 from the response frame. In the present embodiment, however, the wireless terminal failure detecting unit 13 13 records a detailed car position detected by the car position detection unit 15 when detecting a radio terminal failure, and determines a failure of any of the fixed radio terminals 40a to 40e or the car radio terminal 41 according to the car position. To detect. Thereby, it is possible to inquire about the reception level even while the car 20 is moving up and down.

  FIG. 10 is a table of wireless terminal failure determination 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 the inside of CP1 to CP5 are divided into three, and the entire hoistway 1b is divided into 15 car positions Z1 to Z15. For each of the car positions Z1 to Z15, an optimum radio field intensity range of the fixed wireless terminals 40a to 40e is defined.

  The number of divisions of each car range is arbitrarily determined based on the number of fixed wireless terminals 40 and the transmission output, the speed at which the car 20 moves up and down, and the like. That is, in an elevator such as a high-rise building, since the ascending / descending speed such as the nonstop operation to the top floor is fast, it is conceivable that the number of fixed wireless terminals 40 to be arranged is smaller than the number of halls and the transmission output is increased. Therefore, it is necessary to inquire about the reception level even while the car 20 is moving up and down.

  Since the inquiry of the reception level requires real-time processing, it is assumed that the car 20 exists in the same car position Z within the time from when the car 20 ascending and descending transmits the control frame and the response frame is returned. Is divided into

  FIG. 11 is a flowchart illustrating the operation of detecting a wirelessly failed terminal. In the present embodiment, a fixed wireless terminal failure and a car wireless terminal failure are detected separately.

  In step S21, the wireless terminal failure detection unit 13 determines a wireless terminal failure based on a radio field intensity range defined by the car position Z for which a reception level inquiry is made. If it is determined that the wireless terminal is not out of order (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 failure detections in the car range CP is counted up by the counter 16. The car range CP and, preferably, a detailed car position in the car range CP are further obtained and recorded from the car position detection unit 15, and the number of failure detections is separately counted up for each of the car ranges CP1 to CP5.

  Taking into account a temporary momentary interruption of the communication link, a change in the communication environment, and the like, a failure determination is made based on a plurality of failure detection times instead of performing a final wireless terminal failure determination by one determination. 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 a failure is not detected in a plurality of car ranges (S23: No), and if the number of failure detections is equal to or more than a set value in a certain car range CP (S24: Yes), in step S25, a response to the particular car range It detects that the fixed wireless terminal 40 is out of order.

  As described above, according to the second embodiment, by detecting the car position when detecting a radio terminal failure and recording the car range, which of the plurality of fixed wireless terminals has failed can be determined. Can be specified with high accuracy. In addition, by detecting a failure not only at a specific car position but continuously, it is possible to specify that the failure is at the car radio terminal side. Further, even when the car 20 moves up and down at a high speed, the failure can be determined.

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

  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 about the reception level is performed using the control frame in FIG. 4B and the response frame in FIG. 5B. At this time, a normal radio field intensity range (predetermined range) for the car position is read from the system data storage unit 14. In step S33, it is determined whether or not the reception level at the car radio terminal 41 is within the predetermined range. When the reception level at the car wireless terminal 41 is out of the predetermined range (S33: No), the process proceeds to step S40, moves to the next car range CP of the fixed wireless terminal 40, and proceeds to step S32. Return. If the reception level at the car wireless terminal 41 is within the 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 wireless terminal 40.

  In step S35, test transmission for inquiring about the reception level is performed as in step S32. At this time, a normal radio field 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 out of the predetermined range (S36: No), the process proceeds to step S38, where the failure of the fixed radio terminal 40 in the car range CP where the car 20 is located is determined. judge. In step S39, if test transmission has not been performed for all fixed wireless terminals 40a to 40e (car range CP1 to CP5), the mobile station moves to the next fixed wireless terminal car range CP (step S40). It returns to S32.

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

  The above flowchart is an example in which the test transmission is performed from the fixed wireless terminal on the top floor, but may be performed from the lowest floor.

  In addition, the failure judgment 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 twice outside the predetermined range. However, the position of the car radio terminal 41 may be further moved, and the failure determination may be performed when the reception level at the car radio terminal 41 becomes a radio field strength outside the predetermined range three or more times.

  As described above, according to the third embodiment, the detection accuracy of the wireless terminal failure can be improved by performing the operation dedicated to the wireless terminal failure diagnosis during a time when the number of elevator users is small or the like.

(Fourth embodiment)
FIG. 13 is an explanatory diagram of the communication range of each wireless terminal when a fixed wireless terminal fails in the fourth embodiment. FIG. 13 shows an example in which the fixed wireless terminal 40c breaks down. When the 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, the range where radio communication can be performed around the fixed wireless 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 the radio wave reaches the fixed radio terminal 40b or 40d. In the figure, it is indicated by a two-dot chain line circle.

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

  Further, since the overlapping cage ranges CP are 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 reduced. In FIG. 11, the radio field intensity is shown by a circle without directivity, but each radio terminal may have 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 is 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 wirelessly with high reliability without using the tail code.

  Although some embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. The new embodiment can be implemented in other various forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. The present embodiment and its modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and their equivalents.

1a ... machine room 1b ... hoistway 10 ... elevator control device 11 ... operation control unit 12 ... wireless communication control unit 13 ... wireless terminal failure detection unit 14 ... system data storage unit 20 ... car 21 ... hoisting machine 22 ... counterweight 23 ... Main rope 30 ... Car control unit 40 ... Fixed radio terminal 41 ... Car radio terminal

Claims (5)

A car that moves between 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 wireless terminal connected to the car control unit and transmitting the radio wave intensity of the radio wave from the fixed wireless terminal;
A wireless terminal failure detection unit that detects a wireless terminal failure of the fixed wireless terminal and the car wireless terminal based on the radio field intensity,
A car position detection unit that detects the position of the car in the hoistway ,
Has,
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 at the time of detecting the wireless terminal failure, and determines a car range corresponding to the specified car range. wherein upon detecting a wireless terminal fault, the be determined fixed wireless terminals is faulty Rue elevators wireless communication system is located in specified said car range number or more. A car that moves between 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 wireless terminal connected to the car control unit and transmitting the radio wave intensity of the radio wave from the fixed wireless terminal;
A wireless terminal failure detection unit that detects a wireless terminal failure of the fixed wireless terminal and the car wireless terminal based on the radio field intensity,
Has,
When continuously moving the car to the car range corresponding to each communication range of the fixed wireless terminal, when the wireless terminal failure detection unit detects the wireless terminal failure in at least two consecutive car range, Rue elevators wireless communication system to determine the said car radio terminal is faulty. The elevator radio communication according to claim 1 or 2 , wherein the car is moved to the car range corresponding to the communication range of the specific fixed wireless terminal, and communication with the specific fixed wireless terminal and the car wireless terminal is performed. system.   A car that moves between 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 wireless terminal connected to the car control unit and transmitting the radio wave intensity of the radio wave from the fixed wireless terminal;
  A wireless terminal failure detection unit that detects a wireless terminal failure of the fixed wireless terminal and the car wireless terminal based on the radio field intensity,
  Has,
  When the wireless terminal failure detection unit determines that the fixed wireless terminal has failed, when the car is located in the car range corresponding to the failed fixed wireless terminal determined to have failed, the failure occurs. An elevator radio communication system that raises the radio output of the fixed wireless terminal adjacent to the failed fixed wireless terminal to a level at which the fixed wireless terminal adjacent to the fixed wireless terminal and the car wireless terminal can communicate. When the wireless terminal failure detection unit determines that the fixed wireless terminal has failed, when the car is located in the car range corresponding to the failed fixed wireless terminal determined to have failed, the failure occurs. to said fixed radio terminal and said car radio terminal can communicate level adjacent the fixed radio terminal, the fault fixed the any one of the fixed claims 1 to increase the wireless output of the wireless terminal 3 which is adjacent to the radio terminal An elevator radio communication system according to claim 1.

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