JP2019142603A - Elevator and transmitting method of elevator signal - Google Patents

Abstract

To ensure a transmitting speed and a reliability required over a stroke of an elevator car when the signal between the car and a control device is radio-transmitted in a multi-car elevator.SOLUTION: The transmitting method of an elevator signal determines an allowance of a horizontal distance between an antenna installed in a hoistway and a radio terminal installed in an elevator car so as to satisfy a specification value related to a transmitting speed and a reliability of the radio transmission. Then, the transmitting method of the elevator signal determines the installation position of the antenna in the hoistway so that the difference between the horizontal distance above mentioned when the elevator car travels on an ascending exclusive lane and that when the elevator car travels on a descending exclusive lane, falls within the allowance of the horizontal distance calculated.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an elevator and an elevator signal transmission method.

  Conventionally, an elevator places a single car on one hoistway and moves the single car up and down. Since the hoistway is occupied by a single car, the hoistway utilization rate is relatively low and the operation efficiency is low. Therefore, in order to improve the elevator transport capacity, the realization of a multi-car elevator that operates with a plurality of cars arranged in the hoistway is being sought.

  In one form of multicar elevator, multiple lanes for raising and lowering the car are provided in the hoistway. In order to expand the moving range of the car in the hoistway, a structure is known in which the car can move between lanes by combining the movement in the hoisting direction and the movement in the horizontal direction. With this configuration, when one of a plurality of cars goes up and down, the other cars are raised and lowered in other lanes in the hoistway, so that the degree of freedom of movement of the car is increased. In addition, utilization and operational efficiency can be improved. Such a technique is described in, for example, Japanese Patent Application Laid-Open No. 2006-111408.

JP 2006-111408 A

  In an elevator, a transmission path is required for transmitting various signals between control devices installed outside the car and the car. In many cases, transmission lines are connected to a car and a control device by a bundle of a number of electric wires, generally called tail cords or traveling cables. However, when a tail cord or the like is used in a multi-car configuration, there is a risk of interference with other cars.

  For this reason, it is conceivable that various signals are converted into digital data and transmitted wirelessly. In order to perform wireless transmission between the car and the outside of the car, it is conceivable to arrange an antenna in the hoistway along the moving direction of the car. As one example, a leaky coaxial cable (LCX) is installed in parallel with the hoistway.

  In the multi-car elevator described above, it is conceivable to install an antenna in each of a plurality of lanes, but in that case, the configuration of the antenna becomes large and complicated.

  An object of the present invention is to provide an elevator and an elevator signal transmission method capable of solving the above problems and improving reliability with a simple configuration.

  In order to solve the above-mentioned object, according to the present invention, a moving mechanism that raises or lowers a car in the first lane and the second lane, and a car between the first lane and the second lane. The communication mechanism for moving, the wireless terminal mounted on the car, the wireless terminal of the car moving in the first lane, and the wireless terminal of the car moving in the second lane share a signal. The antennas are arranged along the first lane and the second lane so that they can be exchanged.

  Preferably, as an example, an ascending lane and a descending lane installed in one hoistway, and connecting paths connecting the upper and lower ends of the ascending lane and the descending lane respectively. A plurality of cars circulating in the ascending lane, the descending lane and the connecting path, and means for wirelessly transmitting at least control signals between the plurality of cars and the control device. And the wireless transmission means is connected to a wireless terminal installed in each of the plurality of cars, a wireless terminal connected to the control device, and a wireless terminal connected to the control device. The antenna further includes a radio terminal installed in the car traveling on the ascending lane, and the descending From the radio terminal installed in the car traveling on the use lane, the difference between the distances respectively on the horizontal plane is installed on the wall surface of the hoistway so as to be smaller than the predetermined allowable value.

  According to the present invention, stable communication is possible with a simple configuration in communication with a wireless terminal mounted on a car.

Explanation of antenna function in LCX. The whole structure of the elevator in the 1st Example of this invention. The structure of the control apparatus in the 1st Example of this invention. The signal transmission format in the first embodiment of the present invention. Description of the plane installation conditions of the antenna in the first embodiment of the present invention. Description of the planar installation conditions of the antenna in the first embodiment of the present invention Description of the planar installation conditions of the antenna in the first embodiment of the present invention The description of the installation range of LCX in the first embodiment of the present invention. The explanation of the radiation angle of the electromagnetic wave in the first embodiment of the present invention. The whole structure of the elevator in the 2nd Example of this invention. The structure of the control apparatus in the 2nd Example of this invention. The signal transmission format in the second embodiment of the present invention. Overall structure of the elevator in the third embodiment of the present invention Explanation of plane installation conditions of the antenna in the third embodiment of the present invention.

  Embodiments will be described below with reference to the drawings.

  As a first embodiment of the present invention, a configuration example in the case of communication between a car and a control device using LCX in a circulation type multicar elevator will be shown.

  First, the whole structure when the elevator of a present Example is seen from the front (landing direction) and a side surface is demonstrated using FIG.2 and FIG.3.

  In FIG. 2, the elevator 1 includes at least one hoistway 2 and a machine room 10 provided outside the hoistway 2.

  Pulleys 5 are installed at the upper and lower ends inside the hoistway 2 (illustration of structural members for fixing them to the hoistway 2 is omitted. The same applies to the following components). A set of annular drive belts 4 is hung on the pulley 5, and the cars 3 a and 3 b are fastened to the drive belt 4. The number of cars fastened to one set of drive belts need not be limited to two in this embodiment.

  The drive belt 4 includes, for example, a magnetic material. As the drive means 12, for example, a linear motor or the like that applies thrust to the drive belt 4 by induction is used. The driving belt 4 is given a thrust by the driving means 12 and rotates while being wound around the pulley 5. Accordingly, the cars 3a and 3b fastened to the drive belt 4 move up and down in the hoistway. The driving device 12 is controlled by the control device 11 so that the passenger moving to the upper floor and the passenger moving to the lower floor are separated and the car is rotated only in one direction in principle for the purpose of smooth operation. . As a result, in the hoistway 2, the ascending lane and the descending lane are separated.

  The car that has reached the upper end of the ascending lane and the lower end of the descending lane moves to the other lane while being wound around the pulley 5 together with the drive belt 4, and the raising / lowering direction is reversed.

  A control device 11 is installed in the machine room 10. FIG. 3 shows a detailed configuration of the control device 11. The control device 11 includes an operation control unit 110, a drive control unit 111, and a safety circuit 112. Further, the group management unit 113 and the monitoring / control unit 114 may be provided in accordance with the operation mode. The operation control unit 110 calls the moving target floors of the cars 3a and 3b and the target speed toward them based on the call from the landing or the destination designation from the passengers in the car or the dispatch command from the group management part 113 described later. And a thrust command for obtaining the target speed is transmitted to the drive control unit 111. The target speed and thrust command are updated from time to time while monitoring the position and speed of the cars 3a and 3b. When the cars 3a and 3b arrive at the target floor, a car door opening / closing command or the like is transmitted to the drive control unit 111 for the getting-on / off operation.

  The drive control unit 111 is connected to the drive unit 12 through a signal line and a power supply line, and generates an output power to the drive unit 12 in order to apply a thrust to the drive belt 4 in accordance with a thrust command from the operation control unit 110. Further, according to the door opening / closing command, the opening / closing speed and target torque of the car are generated.

  The safety circuit 112 monitors the state of the inside and outside of the cars 3a and 3b and the inside and outside of the hoistway 2 (including the machine room 10) and the soundness of the control device 11 in order to ensure the safety of passengers and operation. An electronic circuit or software configured to determine availability. When a state that hinders safe operation is detected, predetermined safety operations including stopping the cars 3a and 3b and restricting the operation are executed.

  The group management unit 113 is provided for the purpose of transporting passengers efficiently and comfortably, and performs control for interlocking with other elevators 1. For example, based on the calling state from each floor platform, the dispatch of the car to each floor is adjusted so that the waiting time of the passenger is minimized, and the result is transmitted to the operation control unit 110 of each elevator as a dispatch command.

  The monitoring / control unit 114 collects maintenance / maintenance information such as the operation state of the elevator 1 and the soundness of each device, and transmits it to a center or the like via a communication line (not shown). Also, in the event of an emergency such as a disaster or failure, a control operation according to a command from the center is executed in cooperation with the operation control unit 110, or a special operation that is used in maintenance / inspection operations by maintenance personnel. Shift to operation mode.

  In an actual design, a part or all of the control device 11 and the operation control unit 110 to the monitoring control unit 114 described above are outside the machine room 10, for example, the inside of the hoistway 2, the cars 3a, 3b, or others. However, this does not prevent the implementation of the present invention (the same applies to the following embodiments).

  Of the signals and information necessary for the operation of the operation control unit 110, the drive control unit 111, and the safety circuit 112 described above, those related to the cars 3a and 3b (described later) are connected to the transmission control unit 120, respectively. The transmission control unit 120 acquires the signals and information from the cars 3a and 3b, and manages a transmission / reception procedure for transmitting the signals and information to the cars 3a and 3b and a data format at that time.

The wireless access point 21 is connected to the transmission control unit 120 via a signal line, and further connected to the LCX 22 installed in the hoistway 2 via a signal line. That is, in order to connect the wireless access point 21 and the wireless terminals 30a and 30b of the cars 3a and 3b, a leaky coaxial cable (LCX / L easy) installed in the hoistway in parallel with the moving direction of the cars 3a and 3b. We are using the C oa x ial Cable).

  Wireless terminals 30a and 30b are mounted on the upper portions of the cars 3a and 3b, respectively. Each of the wireless terminals 30a and 30b is connected to a device group (not shown) mounted on the cars 3a and 3b through signal lines. The device group collects signals and information such as the operation state of the destination floor button, the door opening / closing state, the current position of the car, and the like, and wirelessly communicates from the wireless terminals 30a and 30b through the LCX 22 and the wireless access point 21. , Transmitted to the transmission control unit 120. In addition, the transmission control unit 120 transmits, for example, signals and information such as a car door opening / closing command and display information of the current floor by wireless communication from the wireless access point 21 through the LCX 22 and the wireless terminals 30a and 30b. Transmit to the device group.

  A communication technique applied to signal transmission may be arbitrarily selected in view of requirements regarding signals to be transmitted, that is, transmission capacity and transmission delay. For example, a so-called wireless LAN of the IEEE802.11 series or a low-power wireless in the 920 MHz band can be candidates. The LCX 22 selects the one suitable for the frequency used in the selected communication technology.

  Signal transmission between the wireless access point 21 and the wireless terminals 30a and 30b may use the same frequency or frequency band, and may assign different frequencies or frequency bands as necessary.

  The transmission control unit 120 transmits a signal using, for example, the format shown in FIG. 4 on the communication path based on the communication technique selected based on the above.

  The signal transmission format 200 includes a header 201, a car ID 202, a sequence number 203, a transmission status flag 204, a signal data unit 205, and an error detection / correction code 206.

  The header 201 is a specific value used for identifying the signal transmission of the elevator from other wireless communication, but may be replaced by a header possessed by the wireless communication technology described later.

The car ID 202 is an identifier for distinguishing the car 3a, the car 3b, and the control panel 11 in the transmission / reception procedure.
The sequence number 203 and the transmission status flag 204 are information for managing the status of signal transmission, and are used for detection of missing or duplicated signal data, notification of an error to the other party, and the like.

  The signal data unit 205 is a main body of the signal to be transmitted, and stores the ON / OFF state of the switch, the detected value of the sensor, the output command value to the actuator, the output value to the display device, etc. in the form of digital data.

  The error detection / correction code 206 is a confirmation value used for detecting or correcting an error in the received signal data in the receiving car or control panel. As the error detection / correction code, a CRC, a hamming code, a convolutional code, or other existing techniques or a combination thereof may be arbitrarily adopted. However, it is necessary to select the parameters of the code based on the number of bits of the transmission target signal, the bit error rate of the transmission path, the required reliability, and the like.

  Next, the arrangement of the LCX 22 will be described. FIG. 5 is a plan view of the inside of the hoistway 2 as viewed from above. Although not shown in the present embodiment, it is assumed that the landings on each floor are open only on the front.

  The drive belt 4 is fastened to the diagonals of the cars 3a and 3b by a car fastening portion 6 and is wound around pulleys 5 that are arranged offset.

  As described above, the wireless terminals 30a and 30b are installed above the cars 3a and 3b. In this embodiment, the wireless terminal is installed at the rear side end of the car. This is intended to suppress the attenuation of electromagnetic waves due to the separation distance by installing as close as possible to the LCX22. Actually, it may be arbitrarily determined within the range that does not interfere with signal transmission, taking into account the arrangement of other devices installed in the car. However, in order to suppress variations in the amount of attenuation of electromagnetic waves, it is desirable to align the wireless terminal mounting position in each car. Therefore, it is most desirable to install the LCX 22 so as to be equidistant from the installation positions of the wireless terminals 30a and 30b. Next, as a desirable mode, the relative installation position of the LCX 22 with respect to the wireless terminals 30a and 30b will be described in order.

  The LCX 22 is installed inside the hoistway 2 along the traveling direction of the car, that is, the vertical direction. At this time, it is necessary to determine the installation position in the horizontal plane so as to satisfy the specification values regarding the speed and reliability of signal transmission. The procedure will be described below.

  First, the rough installation position of LCX22 in the hoistway will be examined. The LCX 22 has a structure similar to that of a general coaxial cable. As shown in FIG. 1, the inner conductor 101 of a metal wire or pipe is surrounded by an insulator 102 and an outer conductor 103, and a resin sheath (not shown). is there. An opening called a slot 104 is provided in the outer conductor 103 of the coaxial cable. When an electric signal input to the LCX 22 propagates inside, a part of the electric signal is radiated from the slot 104 to the external space as an electromagnetic wave to function as an antenna. As shown in FIG. 9, the electromagnetic wave radiated to the external space forms a certain angle θ with respect to the propagation direction in the cable depending on the shape and arrangement of the slots and the frequency of the electromagnetic wave.

  The intensity of the signal radiated to the outside of the LCX 22 is represented by a ratio (coupling loss) with the intensity of the signal propagating in the LCX. The value varies depending on the product design, but is typically about −50 to −70 dB at a distance of 1.5 m from the cable. In addition, it is known that the intensity of the electromagnetic wave radiated from the LCX 22 attenuates in inverse proportion to the separation distance from the LCX, and the received power decreases by about 3 dB each time the separation distance from the cable is doubled. .

  When using a low-power electromagnetic wave that does not require a license for signal transmission, the attenuation due to the separation distance may not be negligible. For example, as shown in the revised 802.11 high-speed wireless LAN textbook, published by Impress R & D, Inc., every time the signal power decreases by 3 dB (about twice) the noise power, the packet error rate (PER) is 10 The actual measurement result that is doubled is shown. That is, even in the same environment, the reliability of signal transmission is greatly affected by the arrangement of the LCX 22 as an antenna.

  In IEEE802.11a known as a 5 GHz band wireless LAN, a minimum reception sensitivity is set for each communication speed option, and communication cannot be performed at that speed when the signal power is lower than that. For example, a reception power of −82 dBm or more is required when communicating at 6 MBps, whereas −79 dBm or more, which is twice the strength, is required when communicating at 12 Mbps.

  Therefore, when wireless signal transmission is performed in the elevator hoistway, in order to ensure sufficient transmission speed and reliability over the entire stroke, the amount of attenuation caused by the separation distance between the up-direction car and the down-direction car. It is necessary to make the bias of as small as possible. It is necessary to determine the LCX installation position from such a viewpoint.

  In the case of a general antenna such as a dipole type or whip type used for point-to-point communication, it is known that the radiated electromagnetic wave attenuates in inverse proportion to the square or the third power of the separation distance from the antenna. ing. Therefore, even when wireless signal transmission is performed by an antenna other than LCX, there may be a case where the attenuation is biased between the upward direction car and the downward direction car depending on the arrangement of the antenna.

  From the viewpoint of ensuring the speed and reliability of radio signal transmission for each car by the arrangement of LCX, the intensity of electromagnetic waves is leveled by the car in the up direction and the car in the down direction.

  In the case of the hoistway layout shown in FIG. 5, the LCX 22 may be installed in any of the inner walls 26 to 28 of the hoistway and the intermediate space 29 between the cars 3 a and 3 b. Among these, the radio terminal 30a becomes a shadow of the car 3b when viewed from the LCX 22 in the vicinity where the cars 3a and 3b have the same height when arranged on the inner wall 27 on the side surface (the LCX 22 is placed on the opposite wall surface). In some cases, the radio terminal 30b becomes a shadow of the car 3a), and by arranging as shown in FIG. 6, a line of sight can be secured regardless of the positions of the cars 3a and 3b. Since the wireless terminal 23b becomes a shadow of the car 3a when installed on the inner wall 27 on the side surface, installation on the inner wall 27 on the side surface is not adopted and the LCX 22 is installed on the inner wall 28 on the back surface.

  When the rear inner wall 28 is used, since there is no obstruction by the obstacle and both the radio terminal 30a and the radio terminal 30b are in the same direction as the LCX 22, directivity appropriate for the antenna on the radio terminal side (for example, 90 degrees, radio). (Depending on the distance between the terminal and the LCX), stable signal transmission is possible regardless of the position of the car. The same applies to the front inner wall 26, but the installation position is restricted in order to prevent the LCX 22 from reaching the opening of the landing.

  Further, even when the intermediate space 29 is used, it is not shielded by an obstacle. However, the radio terminal 30a and the radio terminal 30b have opposite directions with respect to the LCX 22, so that an omni-directional antenna (omni antenna) with respect to the horizontal plane is always used. It is necessary to mount a directional antenna configured to radiate electromagnetic waves in the direction of the LCX 22 in the wireless terminal. Since the former radiates electromagnetic waves in all directions, the power component contributing to signal transmission is small and sufficient reliability cannot be obtained. In the latter case, a mechanism for changing the directivity according to the position of the car is required, resulting in a disadvantage that the wireless terminal becomes complicated and large.

  Next, in order to determine a detailed installation position, an allowable value regarding a horizontal separation distance from the radio terminals 30a and 30b is derived. In FIG. 7, the intermediate line 50 between the wireless terminal 30a and the wireless terminal 30b is set to 0 [m], and the installation position of the LCX 22 on the inner wall 28 on the back surface is set to x [m] (the right side in the figure is the positive direction). Also, the positions of the vertical lines dropped from the installation positions of the wireless terminals 30a and 30b to the rear wall 28 are x1 [m] and x2 (= −x1) [m], and the lengths of both perpendicular lines are y [m]. To do.

At this time, the separation distances d1 [m] and d2 [m] between the wireless terminals 30a and 30b and the LCX 22 are respectively
d1 = sqrt ((x−x1) ² + y ² ) (Formula 1)
d2 = sqrt ((x−x2) ² + y ² ) (Formula 2)
(Sqrt is the square root). Further, if the transmission power of the wireless access point 21 is p0 [dBm], the transmission loss of the LCX 22 and the coupling loss at a separation distance of 1.5 m are lt [dBm] and lc [dBm], respectively, the wireless terminals 30a and 30b are installed. The received powers p1 [dBm] and p2 [dBm] at the position are respectively
p1 = p0-lt-lc-log10 (d1 / 1.5) (Formula 3)
p2 = p0-lt-lc-log10 (d2 / 1.5) (Formula 4)
(Log 10 is a logarithm with base 10).

Further, when the PER in signal transmission from the wireless access point 21 to the wireless terminals 30a and 30b is e0 [−] when the received power pr [dBm], the PER at the received power p1 and p2 is as described above. Using the relationship described,
e1 = e0 × 10 ^ ((pr−p1) / 3) (Formula 5)
e2 = e0 × 10 ^ ((pr−p2) / 3) (Formula 6)
Is derived.

  FIG. 8 shows a plot in which x is plotted on the horizontal axis, p1 and p2 are plotted on the vertical axis, and PERs corresponding to them are plotted in the example in which the constants of the relational expressions described above are set.

  For example, if the PER needs to be 10 ^ -3 or less from the reliability of signal transmission required for the elevator 1, the installation position x of the LCX 22 is such that e1 and e2 are both 10 ^ -3 or less. It is derived that the area needs to be the range indicated by the shaded portion in FIG.

  Further, in order to enable the radio terminals 30a and 30b to receive electromagnetic waves radiated from the LCX 22 wherever the cars 3a and 3b are in the process, conditions are also set for the vertical installation range of the LCX 22. Specifically, as shown in FIG. 9, the cars 3a and 3b reach the uppermost and lowermost points on the lines extending from the upper and lower ends of the LCX 22 at the electromagnetic wave radiation angle θ described above. The LCX is installed so that the wireless terminal 30a and the wireless terminal 30b will come. Of course, the upper and lower ends of the LCX 22 may be wider than the above range.

  As described above, by configuring the LCX 22 to be equidistant on the horizontal plane from the wireless terminals mounted in the upward and downward cars, the electromagnetic waves radiated from the LCX 22 can be transmitted wirelessly. The amount of attenuation until reaching the terminal can be made comparable, and the speed and reliability of wireless transmission of signals and information between the control unit and each car can be ensured throughout the entire car journey. it can.

  As described above, in the present embodiment, first, the horizontal distance between the antenna installed in the hoistway and the wireless terminal installed in the car is set so as to satisfy the specification values regarding the transmission speed and reliability of the wireless transmission. Determine the value. Next, the installation position of the antenna in the hoistway is determined so that the difference between the case where the car travels on the ascending lane and the case where the car travels on the descending lane is within the calculated allowable value. As a result, the difference in the intensity of electromagnetic waves radiated from the antenna to the car in the up direction and the car in the down direction can be minimized, and stable speed and reliability can be achieved throughout the car. Signal transmission can be performed.

  As a second embodiment of the present invention, a configuration when the number of cars in the circulation type multicar elevator is increased will be described below. In the embodiment described below, parts different from the first embodiment will be described. Therefore, the part whose explanation is omitted is the same as that of the first embodiment.

  In FIG. 10, the whole structure of the elevator 1 in a 2nd Example is shown. The basic configuration is the same as in the first embodiment, but three sets of drive belts 4a to 4c are wound around the pulley 5. Cars 3a and 3d are fastened to the drive belt 4a, cars 3b and 3e are fastened to the drive belt 4b, and cars 3c and 3f are fastened to the drive belt 4c. The drive means 12 is expanded so that the drive belts 4a to 4c can be controlled independently, thereby enabling operation of six cars.

  In FIG. 11, the configuration of the control panel 11 is also expanded so that three sets of drive belts can be operated independently. Specifically, operation control units 110a to 110c, drive control units 111a to 111c, and safety circuits 112a to 112c are provided corresponding to each drive belt.

  Note that the number of drive belts to be installed is not limited to three in this embodiment, and can be arbitrarily determined based on the transport capacity required for the elevator 1 and other conditions.

  Similarly to the first embodiment, the transmission control unit 120 is mounted on the cars 3a to 3f through the wireless access points 21, the LCX 22, and the wireless terminals 30a to 30f, respectively, for signals and information referred to and generated by the above functions. Configured to transmit to and from each other. These signal transmissions may all use the same frequency or frequency band, and may be divided according to the car, drive belt, or other criteria as necessary, each with a different frequency or frequency band. It may be assigned. When a plurality of frequencies or frequency bands are used, one LCX 22 may be shared by all of them, or a plurality of LCXs 22 may be installed and one or more frequencies or frequency bands may be assigned to each. .

  As a format used for the signal transmission, for example, a field configuration shown in FIG. 12 is adopted. The same field configuration as that described in the first embodiment is used except that a field of loop ID 210 is added. The loop ID is an identifier indicating to which driving belt the car that performs signal transmission is fastened. As described above, since six cars are fastened to three sets of driving belts, two driving belts that correspond to the position information of the cars necessary for operation control, the state of the equipment in the car, and the driving commands. It is for managing as a unit.

  Since LCX radiates electromagnetic waves continuously in the longitudinal direction, there is little variation in transmission quality in the same direction, and it is suitable for signal transmission targeting mobile objects. However, when applied to an elevator, it is necessary to install along the entire moving range of the car, so there are cases where the material cost and the installation cost are high.

  In the third embodiment, a configuration using a normal antenna is described based on this. In the present embodiment, “normal antenna” is used as a general term for the above-mentioned LCX, in which the electromagnetic wave radiation portion is sufficiently smaller than the transmission range and at most several meters or less. Specifically, a dipole antenna, a rod (whipped) antenna, a Yagi antenna, a parabolic antenna, and their derivatives are assumed, but not limited thereto.

  FIG. 13 shows an elevator 1 having a signal transmission system using a normal antenna. The driving system of the car using the driving belt 4 and the signal transmission system from the control panel 11 to the wireless access point 21 and the wireless terminals 30a and 30b are the same as those in the first embodiment shown in FIG.

  The wireless transmission means in this embodiment is an antenna 24 connected to a wireless access point via a signal line, and the above-described normal antenna is used for this. The antenna 24 is provided in the vertical direction along the lane. In FIG. 13, only two antennas 24 are shown. However, when the present invention is applied to a long-stroke elevator, a plurality of antennas 24 may be provided in the vertical direction so that signal transmission is not interrupted.

  Since the electromagnetic wave radiated from the antenna 24 attenuates in inverse proportion to the square or the third power of the separation distance, the distance between the antennas 24 is selected so that the above-mentioned minimum reception sensitivity abnormality occurs regardless of the position of the car. To do. For the antennas other than the antenna 24 closest to the wireless access point 21, an electromagnetic wave output from the wireless access point 21 or a control signal used for generating the electromagnetic wave is input to the repeater 25 via a signal line, and the electromagnetic wave is directly transmitted by the repeater 25. The electromagnetic wave is amplified or generated using the control signal and supplied to the antenna 24.

  An installation example of the antenna 24 in the hoistway 2 is shown in FIG. As in the first embodiment, it is most desirable that the horizontal position when the antenna 24 is installed be equidistant from the installation positions of the wireless terminals 30a and 30b. In actual installation, the horizontal position at the time of installing the antenna 24 is the PER at each radio terminal based on the received power determined by the separation distance between the antenna 24 and the radio terminals 30a and 30b, as in the first embodiment. Derived and determined so as to be within a range that satisfies the reliability requirement in the elevator 1.

  In the above description, the functions and means not particularly specified in the configuration include an electric circuit, an electronic circuit, a logic circuit, and an integrated circuit incorporating them, as well as a microcomputer, a processor, an arithmetic device similar to these, a ROM, It may be realized by a program executed by a combination of a RAM, a flash memory, a hard disk, an SSD, a memory card, an optical disk and a similar storage device, a bus, a network and a similar communication device, and peripheral devices, It should be noted that the present invention can be established in any implementation mode.

  Moreover, the present invention is not limited to the above-described embodiments, and includes various modifications. For example, the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described. Further, a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. In addition, it is possible to add, delete, and replace other configurations for a part of the configuration of each embodiment.

DESCRIPTION OF SYMBOLS 1 Elevator 2 Hoistway 3 Car 4 Driving belt 5 Pulley 6 Car fastening part 10 Machine room 11 Controller 12 Driving means 21 Wireless access point 22 LCX (Leakage coaxial cable)
23 Wireless terminal 24 Antenna 25 Relay device 26-28 Hoistway inner wall 29 Intermediate space 50 Intermediate line between wireless terminals (installation position reference point)
110 Operation Control Unit 111 Drive Control Unit 112 Safety Circuit 113 Group Management Unit 114 Monitoring / Control Unit 120 Transmission Control Unit

Claims (10)

  Mounted on the car, a moving mechanism that raises or lowers the car in the first lane and the second lane, a communication mechanism that moves the car between the first lane and the second lane, and The first lane and the radio terminal so that the radio terminal of the car moving in the first lane and the radio terminal of the car moving in the second lane can exchange signals in common. An elevator comprising an antenna disposed along the second lane. 2. The packet error rate according to claim 1, wherein a packet error rate is predetermined for both a wireless terminal mounted on a car moving in the first lane and a wireless terminal mounted on a car moving on the second lane. The elevator is characterized in that the antenna is arranged to be equal to or less than the value.   The elevator according to claim 1, wherein a leaky coaxial cable is used as the antenna.   The elevator according to claim 2, wherein upper and lower end positions of the antenna are determined based on a moving range of the car in the first lane and a moving range of the car in the second lane.   2. The elevator according to claim 1, wherein the first lane is one dedicated lane that rises or descends, and the second lane is the other dedicated lane.   The elevator according to claim 4, wherein the first lane and the second lane are configured by moving a car between two pulleys by a drive belt that is supported between two pulleys.   The elevator according to claim 1, wherein the antennas are discretely installed at predetermined intervals.   2. The wireless terminal mounted on a car moving in the first lane and the wireless terminal mounted on the car moving in the second lane as well as transmitting and receiving information via the antenna. An elevator comprising a control device for transmitting and receiving information via the antenna, wherein the control device controls the moving mechanism.   9. The elevator according to claim 8, wherein the communication via the antenna is performed using a format including a car ID and signal data.   An elevator signal transmission method in an elevator in which a car moves up or down in a first lane and a second lane, and the car moves between the first lane and the second lane. Arranged along the lane so that a radio terminal mounted on the car can exchange signals with the radio terminal of the car when moving in the first lane and when moving in the second lane An elevator signal transmission method for transmitting a signal to a control device via an antenna and receiving a signal from the control device via the antenna.

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