JP2007302480A - Radiocommunication system for elevator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a radiocommunication system for an elevator adapted to real environment in which the elevator is operated by radio by hardly receiving influence of other radio devices or the like. <P>SOLUTION: An elevator car 1 and an elevator control room 14 are bidirectionally connected by radio by a pair of elevator radiocommunication devices 4, 12 whose antennas 5, 11 face each other. Video signals, audio signals and data signals are multiplexed to carry out simultaneoues bidirectional radiocommunication, and the respective antennas 5, 11 of the elevator radiocommunication devices 4, 12, and a part or the whole of each of the radiocommunication devices 4, 12 including the antennas 5, 11 are respectively covered with a radome. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an elevator radio communication system apparatus for performing communication with an elevator car, and in particular, an elevator configured with a radio communication apparatus that performs signal transmission of video, audio, control signals, and the like with an elevator car. The present invention relates to a radio communication system apparatus for use.

As a conventional elevator wireless communication device, there has been a skew elevator wireless device (see, for example, Patent Document 1). In this conventional example, communication is performed using a 50 GHz millimeter wave between the car side antenna 14 provided on the elevator car side and the machine room antenna 15 provided on the machine room side, and an operation status message signal is transmitted. And a technology for transferring images and sounds using a microphone, a speaker, a video camera, and a monitor television.
Japanese Unexamined Patent Publication No. 63-282076

  However, such conventional wireless communication devices for elevators have not been examined for video, audio, and control signal communication methods, and it is necessary to define the communication method in order to actually operate. There was a problem that no consideration was given to the obstruction.

  The present invention has been made in order to solve the above-described problems, and a plurality of signals are multiplexed between the elevator car and the elevator control room for wireless transmission in both directions and a radome is used. It is an object of the present invention to obtain an elevator radio communication system apparatus that is less affected by other radio apparatuses and that is suitable for a real environment in which an elevator is operated wirelessly by preventing interference with other radio waves.

  An elevator radio communication system apparatus according to the present invention includes an elevator car between an elevator-side radio communication apparatus provided in an elevator car and an elevator control-side radio communication apparatus connected to an elevator control room that monitors the operation of the elevator. And an elevator radio communication system that wirelessly transmits video signals, audio signals, and various control signals from various devices respectively provided in the elevator control room, the elevator side radio communication device and the elevator control side radio communication The apparatus multiplexes each of the above signals and performs wireless transmission in both directions, and transmits the multiplexed signal by switching to a plurality of channels with a predetermined switching pattern synchronized with the video signal and transmitting the received signal to the predetermined signal. The demodulated signal is demodulated by switching the channel with this switching pattern. That.

  Moreover, the elevator radio communication system apparatus according to the present invention is between an elevator radio communication apparatus provided in an elevator car and an elevator control radio communication apparatus connected to an elevator control room that monitors the operation of the elevator. In an elevator radio communication system that wirelessly transmits video signals, audio signals, and various control signals from various devices provided in an elevator car and an elevator control room, respectively, the elevator-side radio communication device and the elevator control side The wireless communication device multiplexes each of the above signals and performs wireless transmission in both directions, and comprises the multiplexed signal and digital data that performs high-speed digital transmission from various devices provided in the elevator car and the elevator control room, respectively. Wireless transmission in both directions by switching between high-speed data signals Is Umono.

  The elevator wireless communication system according to the present invention multiplexes video signals, audio signals, and various control signals between the elevator-side wireless communication device and the elevator control-side wireless communication device, and wirelessly communicates in both directions. Since transmission is performed, a plurality of pieces of information can be collectively transmitted wirelessly between the elevator car and the elevator control room.

  In addition, the audio signal and various control signals are frequency-modulated with different carrier frequencies, and then added to the video signal with a constant amplitude ratio, and a predetermined carrier wave is frequency-modulated and multiplexed with the added signal. Can be multiplexed to a certain communication bandwidth.

  In addition, since the direct current component of the audio signal and / or various control signals is transmitted, a lower frequency can be transmitted and the low frequency characteristics can be improved. Fixed logic can be transmitted.

  Further, the multiplexed signal is transmitted by switching to a plurality of channels with a predetermined switching pattern synchronized with the video signal, and the received signal is switched with the predetermined switching pattern to demodulate the multiplexed signal. did. From this, it is possible to prevent interference during reception.

  The multiplexed signal and the high-speed data signal composed of digital data for high-speed digital transmission from the elevator car and the elevator control room are switched to perform bidirectional wireless transmission. Thus, wireless transmission of high-speed data signals used in a building LAN or the like can be performed, and adaptation to various usage conditions is possible.

Next, the present invention will be described in detail based on the embodiments shown in the drawings.
Embodiment 1 FIG.
FIG. 1 is a schematic configuration diagram illustrating an example of an elevator radio communication system apparatus according to Embodiment 1 of the present invention.
In FIG. 1, an elevator car 1 includes an elevator-side system device 3 formed by connecting a video camera, a microphone, a speaker, a monitor TV, and the like to a control panel. The elevator-side system device 3 is connected to an elevator-side wireless communication device 4 provided on the upper portion of the elevator car 1, and the elevator-side wireless communication device 4 includes a transmission / reception antenna (hereinafter referred to as an antenna) 5. Yes.

  On the other hand, an elevator control-side radio communication device 12 including an antenna 11 is provided at a position facing the antenna 5 of the elevator-side radio communication device 4 at the upper part of the elevator shaft. The control panel 13 is connected to an elevator control room 14 that monitors the operation of the elevator. The elevator radio communication system 15 includes an elevator side radio communication device 4 and an elevator control side radio communication device 12, and the elevator side radio communication device 4 and the elevator control side radio communication device 12 use millimeter waves. By performing wireless communication in both directions, the elevator car 1 and the elevator control room 14 are wirelessly connected in both directions.

  By doing in this way, various control information such as video, sound and data in the elevator car 1 can be obtained and confirmed on the elevator control room 14 side, and by installing a monitor TV on the elevator car 1 side, the elevator control room. Various control information such as video, audio and data can be obtained in the elevator car 1 from the 14 side. By doing in this way, the cable or trolley conventionally used in the elevator shaft can be omitted. In addition, when the antenna 11 is provided in the lower part of the elevator shaft, the antenna 5 may be provided in the lower part of the elevator car 1.

Next, FIG. 2 is a block diagram showing a configuration example of the elevator-side radio communication device 4 and the elevator control-side radio communication device 12, and the elevator-side radio communication device 4 and the elevator control-side radio communication device 12 have the same configuration. For this reason, FIG. 2 shows the elevator-side wireless communication device 4 as an example.
In FIG. 2, the elevator-side wireless communication device 4 includes an antenna 5, a multiple modulation unit 21, an IF (Intermediary Frequency) modulation unit 22, an RF (Radio Frequency) frequency conversion unit 23, an IF demodulation unit 24, and a multiple demodulation unit 25. Has been.

  The multiplex modulation unit 21 synthesizes and multiplexes video, audio, and data signals from the elevator side system device 3, and the IF modulation unit 22 modulates the signal multiplexed by the multiplex modulation unit 21 to an intermediate frequency. . The RF frequency converter 23 converts the signal modulated by the IF modulator 22 into a millimeter wave frequency, and the frequency-converted signal is transmitted from the antenna 5. Further, the RF frequency conversion unit 23 converts the millimeter wave received by the antenna 5 into an intermediate frequency and outputs it to the IF demodulation unit 24.

  The IF demodulator 24 demodulates the received signal converted to the intermediate frequency by the RF frequency converter 23 into a multiplexed signal, and the multiple demodulator 25 demultiplexes the signal obtained by demodulating by the IF demodulator 24. The converted signal is separated into video, audio and data signals. The video, audio, and data signals obtained by the separation are output from the multiplex demodulator 25 to the elevator-side system device 3. The video signal is a video signal, the audio signal is an audio signal, and the data signal is various control signals.

FIG. 3 is a block diagram illustrating a configuration example of the multiplex modulation unit 21 of FIG.
In FIG. 3, the multiplex modulation unit 21 includes first to third high frequency emphasizing units 31 to 33, a voice / data trap unit 34, a first FM modulation unit 35, a second FM modulation unit 36, and first to first frequency modulation units. The three amplitude adjusting units 37 to 39 and the adding unit 40 are included. The first to third high frequency emphasizing units 31 to 33 perform high frequency band emphasis on the corresponding signals in the video signal, the audio signal, and the data signal transmitted from the elevator side system device 3.

  The first FM modulation unit 35 performs FM modulation on the audio signal that has been high-frequency emphasized by the second high-frequency emphasis unit 32 using, for example, a 5.5 MHz carrier wave, and the second FM modulation unit 36 performs third high-frequency emphasis. The data signal that has been high-frequency emphasized by the frequency enhancement unit 33 is subjected to FM modulation using, for example, a 6.5 MHz carrier wave. As described above, the first FM modulation unit 34 and the second FM modulation unit 35 perform FM modulation using carrier waves having different frequencies.

  On the other hand, the audio / data trap unit 34 removes a predetermined frequency band from the video signal in which the high frequency band is emphasized by the first high frequency emphasizing unit 31. That is, since the high frequency region of the video signal is increased by the first high frequency emphasizing unit 31, the audio / data trap unit 24 removes the same frequency band of the video signal as the carrier of the audio signal and the data signal. In this way, the FM-modulated audio signal and data signal are not disturbed at the high frequency of the video signal.

  The video signal output from the audio / data trap unit 34 is adjusted in amplitude by the first amplitude adjusting unit 37 and output to the adding unit 40. The audio signal that has been FM-modulated by the first FM modulator 35 is adjusted by the second amplitude adjuster 38, and the data signal that has been FM-modulated by the second FM modulator 36 is adjusted by the third amplitude adjuster 39. And then output to the adder 40. The adding unit 40 adds the audio signal from the second amplitude adjusting unit 38 and the data signal from the third amplitude adjusting unit 39 to the video signal input from the first amplitude adjusting unit 37, respectively. The audio signal and the data signal are multiplexed and output to the IF modulator 22.

Next, FIG. 4 is a block diagram illustrating a configuration example of the IF modulation unit 22 of FIG. 2 that modulates the signal multiplexed by the multiplex modulation unit 21 to an intermediate frequency.
In FIG. 4, the IF modulation unit 22 includes an oscillator 41, a frequency divider 42, a phase comparator 43, a reference oscillator 44, an LPF (low pass filter) 45, an adder 46, and a BPF (band pass filter) 47. It is a frequency synthesizer. For example, an output signal output from an oscillator 41 that forms a voltage-controlled oscillator is output to the RF frequency converter 23 via the BPF 47, and is divided by the frequency divider 42 with a predetermined frequency dividing ratio to the phase comparator 43. Is output. The phase comparator 43 compares the phase of the signal input from the frequency divider 42 with the reference signal generated by the reference oscillator 44, and outputs a voltage corresponding to the phase difference to the adder 46 via the LPF 45. .

  The adder 46 adds the signal input from the LPF 45 and the multiplexed signal input from the multiplex modulation unit 21 and outputs the result to the oscillator 41. The oscillator 41 has a frequency corresponding to the signal input from the adder 46. Generate and output a signal. From this, it is possible to obtain an FM modulated signal that is multiplexed and modulated at an intermediate frequency by adding the multiplexed signal input from the multiplex modulator 21 to the output signal of the LPF 45 by the adder 36.

  FIG. 5 is a diagram illustrating an example of a spectrum of the multiplexed FM modulation signal output from the IF modulation unit 22. The video carrier having an intermediate frequency has two waves for bidirectional communication, and is, for example, 1.55 GHz and 2.05 GHz here. With this video carrier as the center, the audio carrier and the data carrier are in both sidebands. Since the NTSC signal always has a color carrier at frequencies that are +3.58 MHz and −3.58 MHz with respect to the frequency of the video carrier, the color carrier, the audio carrier, and the data carrier are added, so the beat frequency is within the NTSC band. Appears. As a result, beat stripes appear in the video and the video quality deteriorates.

  In order to prevent the beat stripe, the levels of the audio carrier and the data carrier are adjusted by the second amplitude adjustment unit 38 and the third amplitude adjustment unit 39 of the multiplex modulation unit 21. Currently, the audio carrier level is 15 to 20 dB lower and the data carrier level is 20 to 25 dB lower than the video carrier.

  The carrier level setting is determined from the performance of the receiver. An audio carrier is set so that the maximum communication distance is set to a communication distance capable of securing a reception S / N ratio of 40 dB for the video signal, and the reception S / N ratio of the audio signal and the data signal at this time becomes a value required as a device. And adjust the data carrier level. For example, the S / N ratio between the audio signal and the data signal at the maximum communication distance is 25 to 20 dB and 20 to 15 dB, respectively. Such a setting may be changed according to the request of the elevator system, and the S / N ratio between the audio signal and the data signal may be reversed from the above setting.

FIG. 6 is a block diagram showing a configuration example of the RF frequency conversion unit 23 in FIG.
In FIG. 6, the RF frequency converter 23 includes an IF transmission BPF 51, a transmission mixer 52, a millimeter wave transmission BPF 53, a circulator 54, a millimeter wave reception BPF 55, a reception mixer 56, an IF reception BPF 57, and a directional coupler. 58 and a millimeter-wave oscillator 59 that generates and outputs a millimeter-wave signal.

  In such a configuration, the millimeter wave signal output from the millimeter wave oscillator 59 is divided into two by the directional coupler 58 and then input to the transmission mixer 52. The transmission mixer 52 is an up-converter, which mixes the intermediate frequency signal input from the IF modulator 22 via the IF transmission BPF 51 with the above-described millimeter wave signal and converts the frequency to a millimeter wave. A millimeter wave for transmission is supplied to the antenna 5 via the BPF 53 for wave transmission and the circulator 54. The transmission millimeter wave is transmitted from the antenna 5.

  The reception millimeter wave received by the antenna 5 is input to the reception mixer 56 that forms a down converter via the circulator 54 and the millimeter wave reception BPF 55, and is converted into an intermediate frequency by the reception mixer 56. The signal is output to the IF demodulator 24 via the IF reception BPF 57. On the other hand, the center frequency of the IF transmission BPF 51 and the millimeter wave transmission BPF 53 is different from the center frequency of the millimeter wave reception BPF 55 and the IF reception BPF 57 by, for example, 500 MHz so that the radio waves on the transmission side do not wrap around the reception side. I am doing so.

  In order to improve the output level of the transmission wave, an amplification amplifier may be inserted before and after the IF transmission BPF 51, or an amplification amplifier may be inserted before and after the millimeter wave transmission BPF 53. In order to improve the output level or noise level of the received wave, an amplification amplifier may be inserted before and after the millimeter wave reception BPF 55, or an amplification amplifier may be inserted before and after the IF reception BPF 57.

Next, FIG. 7 is a block diagram showing a configuration example of the IF demodulator 24 of FIG.
In FIG. 7, the IF demodulator 24 includes a first BPF 61, a first amplifier 62, a mixer (mixer) 63, a second BPF 64, a second amplifier 65, an FM demodulator 66, an oscillator 67, a frequency divider 68, and a phase comparator. 69, a frequency synthesizer 72 including a reference oscillator 70 and an LPF 71.

  In such a configuration, the reception signal converted into an intermediate frequency signal by the RF frequency conversion unit 23 and output is amplified by the first amplifier 62 through the first BPF 61 and input to the mixer 63. The mixer 63 mixes the signal amplified by the first amplifier 62 with the signal generated by the frequency synthesizer 72 and outputs the mixed signal. Since the demodulator frequency of the FM demodulator 66 is as low as 400 MHz, the mixer 63 and the frequency synthesizer 72 are provided to convert the intermediate frequency received signal amplified by the first amplifier 62 to a lower frequency. Generates a signal having a frequency for lowering the frequency of the reception signal of the intermediate frequency.

  The signal output from the mixer 63 is amplified by the second amplifier 65 via the second BPF, demodulated by the FM demodulator 66, and output to the multiplex demodulator 25. Note that the mixer 63 and the frequency synthesizer 72 may be deleted if the demodulation frequency of the FM demodulator 66 can correspond to the same frequency as the received signal of the intermediate frequency obtained from the RF frequency converter 23. The second BPF 64 has a band through which the multiple modulation spectrum shown in FIG. 5 passes, and this band corresponds to one channel of the transmission channel.

FIG. 8 is a block diagram showing a configuration example of the multiplex demodulator 25 in FIG.
In FIG. 8, the multiplex demodulator 25 includes a distributor 81, a voice / data trap unit 82, a first high frequency removing unit 83, an audio signal carrier BPF 84, an audio signal FM demodulating unit 85, a second high frequency removing unit 86, A data signal carrier BPF 87, a data signal FM demodulator 88, and a third high band remover 89 are included.
In such a configuration, the multiplexed signal input from the IF demodulator 24 is distributed by the distributor 81 into a video signal, an audio signal, and a data signal.

  The audio / data trap unit 82 removes the carrier components of the audio signal and the data signal, in this case the 5.5 MHz and 6.5 MHz components, from the video signal obtained by the distributor 81, and further the first high signal. The band removing unit 83 restores the high band part emphasized during the multiplex modulation. By doing in this way, the triangular noise peculiar to FM modulation can be reduced. Next, the signal whose high frequency part has been restored by the first high frequency removing unit 83 is transmitted to the elevator-side system device 3 and reproduced. At this time, it is also possible to transmit to the elevator side system apparatus 3 as digital data using a rectangular wave instead of the video signal.

  The audio signal obtained by the distributor 81 is subjected to FM demodulation by the audio signal FM demodulator 85 after an audio modulation component is extracted by the audio signal carrier BPF 84. Further, the audio signal demodulated by the audio signal FM demodulating unit 85 is transmitted to the elevator-side system apparatus 3 after the high-frequency portion emphasized at the time of multiplex modulation is restored by the second high-frequency removing unit 86. Played. Currently, the direct current component is cut based on the transmission band (300 to 20 kHz) of the audio signal. However, since the direct current component can be transmitted, a lower frequency can be transmitted. The DC component may not be cut.

  On the other hand, the data signal distributed by the distributor 81 is subjected to FM demodulation by the data signal FM demodulator 88 after the data modulation component is extracted by the data signal carrier BPF 87. Further, the data signal demodulated by the data signal FM demodulator 88 is transmitted to the elevator-side system device 3 after the high-frequency portion emphasized at the time of multiplex modulation is restored by the third high-frequency removing unit 89. . The data signal has almost the same transmission band as the audio signal, but since the data signal “1” or “0” is continuously transmitted, the data signal is transmitted up to the DC component.

  Thus, by preparing the elevator-side radio communication device 4 and the elevator-control-side radio communication device 12 similar to the elevator-side radio communication device 4 described above, video, audio, and data signals can be transmitted in both directions and in real time. Can be transmitted. In the elevator-side wireless communication device 4 and the elevator control-side wireless communication device 12, one may be operated as a transmitter and the other as a receiver. In addition, when installing the wireless communication devices as described above on adjacent elevator shafts, the wireless channels are changed so as not to interfere with each other, and the polarization directions of the antennas 5 are arranged so as to be orthogonal to each other. To prevent interference.

  Further, at present, one transmission channel shown in FIG. 5 has a transmission band of 40 MHz and multiplexes three signals, but the band of one transmission channel is widened or the interval between multiplexed carriers is narrow. It is possible to further increase the number of multiplexing.

  Here, the antennas 5 and 11 of the radio communication apparatuses 4 and 12 for elevators using millimeter waves have a high gain of 20 to 40 dBi, and therefore the opening angle of the antennas 5 and 11 has an angle of several tens to several degrees. is doing. Further, since the antennas 5 and 11 of the elevator wireless communication devices 4 and 12 are installed facing each other in the vertical direction, the communication direction is vertical propagation. On the other hand, other wireless systems using millimeter waves, such as inter-building communication systems, automobile radar, road-to-vehicle communication, and inter-vehicle communication, are expected to increase in the future, and these communication directions are likely to be configured with horizontal propagation. . From this, it is conceivable that the radio wave emitted from another radio system becomes an interference wave for the elevator radio communication apparatus.

  In order to reduce the influence from such other wireless systems, the antennas 5 and 11 of the elevator wireless communication devices 4 and 12, each part of the wireless communication devices 4 and 12 including the antennas 5 and 11, or Each of the wireless communication devices 4 and 12 may be covered with a radome as shown in FIG. In FIG. 9, the elevator side wireless communication device 4 is shown as an example, and the same applies to the elevator control side wireless communication device 12, and the description thereof is omitted.

  In FIG. 9, the radome 91 has a horizontal direction with respect to the radio wave transmission / reception direction 92 in order to prevent external contamination and at the same time reduce the influence of direct waves or indirect waves from other radio systems including millimeter waves. It is formed in a dome shape with a metal or a material similar to metal so as to block radio waves. The radome 91 is formed of a material having a low loss with respect to radio waves in the radio wave transmission / reception direction 92 of the antenna 5 so that the main lobe of the antenna 5 is not affected.

  In addition, when installing the elevator side wireless communication device 4 and the elevator control side wireless communication device 12 in the outdoor observation elevator, in order to block millimeter wave propagation emitted from the horizontal direction or millimeter wave propagation from a nearby building. In consideration of the direction and intensity of the incoming millimeter wave, the radome 91 may be formed of a metal or the like so as to reflect the radio waves 93 to 95 from the horizontal direction. Since the millimeter wave has a high degree of straightness, the radome 91 is used so that the radio wave arrival direction can be predicted geometrically by using a ray tracing method so that the antenna 5 and the wireless communication device 4 cannot be seen from the direction in which the radio wave arrives. Determine the shape.

  As described above, the elevator radio communication system apparatus according to the first embodiment bi-directionally connects the elevator car 1 and the elevator control room 14 wirelessly with the pair of radio communication apparatuses 4 and 12 facing each antenna 5 and 11. Connected, video signal, audio signal and data signal were multiplexed and simultaneously wirelessly transmitted in both directions. As a result, video, audio, data, etc. in the elevator car can be obtained and confirmed collectively on the elevator control room side, and by installing a monitor TV on the elevator car side, video, audio, data from the elevator control room side can be obtained. Etc. can be obtained in a lump on the elevator car side, and cables or trolleys conventionally used in the elevator shaft can be eliminated.

  Furthermore, each antenna 5 of the radio communication devices 4 and 12 for the elevator, each part of the radio communication devices 4 and 12 including the antenna 5 or each whole of the radio communication devices 4 and 12 are covered with a radome 91, respectively. Therefore, for example, the influence of radio waves from other radio systems using millimeter waves, such as an inter-building communication system, automobile radar, road-to-vehicle communication, and inter-vehicle communication, can be reduced. Reliability can be improved.

Embodiment 2. FIG.
In the first embodiment, wireless transmission is performed using one channel. However, wireless transmission may be performed using a plurality of different channels. The second embodiment is assumed.
A schematic configuration diagram showing an example of an elevator radio communication system apparatus according to Embodiment 2 of the present invention uses the elevator-side radio communication apparatus 4 in FIG. 1 as an elevator-side radio communication apparatus 101, and the elevator control-side radio in FIG. Since the communication device 12 is the elevator control side wireless communication device 102 and the elevator wireless communication system device 15 of FIG.

  FIG. 10 is a block diagram illustrating a configuration example of the elevator-side wireless communication device 101 and the elevator control-side wireless communication device 102 of the elevator wireless communication system according to the second embodiment of the present invention. Since the elevator side wireless communication device 101 and the elevator control side wireless communication device 102 have the same configuration, FIG. 10 shows the elevator side wireless communication device 101 as an example. Further, in FIG. 10, the same components as those in FIG. 2 are denoted by the same reference numerals, and description thereof will be omitted here, and only differences from FIG. 2 will be described.

  10 differs from FIG. 2 in that a plurality of IF modulation units IFM1 to IFMn (n> 1 natural number) and a plurality of IF demodulation units IFD1 to IFDn are provided, and the multiple modulation unit 21 outputs the difference. A first distribution unit 110 that performs power distribution of the signal, a combining unit 111 that combines and outputs the respective signals output from the IF modulation units IFM1 to IFMn, and a reception signal output from the RF frequency conversion unit 23 A second distribution unit 112 that performs power distribution and a selection switching unit 113 that selects and outputs one of the signals output from the IF demodulation units IFD1 to IFDn.

  In FIG. 10, the signal output from the multiplex modulation unit 21 is input to the first distribution unit 110, and the first distribution unit 110 distributes the power of the signal input from the multiplex modulation unit 21 to each IF modulation unit IFM1. Output to ~ IFMn respectively. The respective signals output from the IF modulation units IFM <b> 1 to IFMn are combined by the combining unit 111 and then output to the RF frequency conversion unit 23. The RF frequency conversion unit 23 performs the same processing as the signal processing on the signal input from the IF modulation unit 22 in FIG. 2 on the signal input from the synthesis unit 111.

  On the other hand, the received signal output from the RF frequency conversion unit 23 is input to the second distribution unit 112, and the second distribution unit 112 distributes the power of the signal input from the RF frequency conversion unit 23 to each IF demodulation unit. Output to IFD1 to IFDn, respectively. The respective signals output from the IF demodulating units IFD1 to IFDn are input to the selection switching unit 113, and the selection switching unit 113 multiplexes only the signals selected in accordance with the control signal from the elevator side system device 3. To 25. The multiplex demodulator 25 performs the same processing as the signal processing on the signal input from the IF demodulator 24 of FIG.

  The IF modulators IFM1 to IFMn have the same configuration as that of the IF modulator 22 shown in FIG. 4, but only the oscillation frequency in the oscillator 41 of FIG. 4 is different. Therefore, since the oscillation frequencies of the respective oscillators in the IF modulation units IFM1 to IFMn are different from each other, the respective oscillators of the IF modulation units IFM1 to IFMn are referred to as oscillators 41A1 to 41An. The block diagram showing the configuration example of the IF modulators IFM1 to IFMn is the same as FIG.

  The IF demodulation units IFD1 to IFDn have the same configuration as that of the IF modulation unit 24 shown in FIG. 7, but only the oscillation frequency of the oscillator 67 in FIG. 7 is different. Accordingly, since the oscillation frequencies of the respective oscillators in the IF modulation units IFD1 to IFDn are different from each other, the respective oscillators of the IF modulation units IFD1 to IFDn are referred to as oscillators 67A1 to 67An. The oscillation frequencies of the oscillators 67A1 to 67An are the same as the oscillation frequencies of the oscillators 41A1 to 41An of the corresponding IF modulation units IFM1 to IFMn. That is, the oscillation frequency of the oscillator 41Am (m is a natural number of 0 <m <n) and the oscillator 67Am are the same. Note that the block diagram showing the configuration example of the IF modulators IFD1 to IFDn is the same as FIG. 7 except that the sign of the oscillator is changed.

  In such a configuration, since the intermediate frequency for determining the transmission channel frequency is generated by the IF modulators IFM1 to IFMn, a multiplexed signal composed of a video signal, an audio signal, and a data signal is generated by the first distributor 110. An IF modulation unit IFM1 to IFMn generates an intermediate frequency for each channel at the same time, and an RF frequency conversion unit 23 converts the frequency to a millimeter wave to perform radio transmission on the multichannel.

  On the other hand, the multi-channel millimeter-wave signal received by the antenna 5 is converted to an intermediate frequency by the RF frequency conversion unit 23, and then power is distributed by the second distribution unit 112 to be output to the IF demodulation units IFD1 to IFDn, respectively. Is done. Each IF demodulating unit IFD1 to IFDn simultaneously FM-demodulates each channel of the corresponding frequency and outputs it to the selection switching unit 113. The selection switching unit 113 selects according to the control signal input from the elevator side system device 3 The signal is output to the multiplex demodulator 25.

  The multiplex demodulator 25 performs the same processing as the signal processing on the signal input from the IF demodulator 24 of FIG. Each data signal is output to the elevator side system unit 3. Although FIG. 10 shows the case where the same multiplexed signal is transmitted in multiple channels, different information may be transmitted for each channel.

  Here, in FIG. 10, the demodulation unit 25 demodulates the signal selected by the selection switching unit 113 in accordance with the control signal from the elevator system device 3, but as shown in FIG. Alternatively, a signal in a good reception state may be automatically selected from the signals input from the IF demodulating units IFD1 to IFDn, demodulated by the multiple demodulating unit 25, and output to the elevator-side system device 3. In FIG. 11, the same components as those in FIG. 10 are denoted by the same reference numerals, and description thereof is omitted here, and only differences from FIG. 10 are described.

  11 differs from FIG. 10 in that a selection unit that selects one of the signals output from the IF demodulation units IFD1 to IFDn and outputs the selected signal to the multiplex modulation unit 25, instead of the selection switching unit 113 in FIG. 125 and the signal output from the selection unit 125 and subjected to high-frequency-removal by the multiplex demodulation unit 25, for example, a signal reception state is determined from the video signal. 10 is used as the elevator-side radio communication apparatus 121. FIG. 10 shows that the elevator-side radio communication apparatus 101 shown in FIG.

  As described above, the elevator side wireless communication device and the elevator control side wireless communication device simultaneously transmit or simultaneously receive the same multiplexed signal using a combination of a plurality of channels, and select a signal of a channel with a good reception state. Yes.

  As described above, the elevator radio communication system apparatus according to the second embodiment performs radio transmission of the signal multiplexed by the multiplex modulation unit 21 using a plurality of channels. In addition to obtaining the same effect as in the first mode, it is possible to select a channel having no interference from a plurality of channels and having high reception quality, and stable reception can be performed.

Embodiment 3 FIG.
In the second embodiment, the multiplex demodulation is performed using any one of the signals demodulated by the IF demodulation units IFD1 to IFDn. However, the signals demodulated by the IF demodulation units IFD1 to IFDn are added. After the amplitude adjustment, the multiplex demodulation unit 25 may perform the multiplex demodulation, and this is the third embodiment of the present invention.
A schematic configuration diagram showing an example of an elevator radio communication system apparatus according to Embodiment 3 of the present invention is an elevator-side radio communication apparatus 131 as an elevator-side radio communication apparatus 131 in FIG. Since the communication device 12 is the elevator control side wireless communication device 132 and the elevator wireless communication system device 15 of FIG.

  FIG. 12 is a block diagram illustrating a configuration example of the elevator-side wireless communication device 131 and the elevator control-side wireless communication device 132 of the elevator wireless communication system according to Embodiment 3 of the present invention. Since the elevator side wireless communication device 131 and the elevator control side wireless communication device 132 have the same configuration, FIG. 12 shows the elevator side wireless communication device 131 as an example. Further, in FIG. 12, the same components as those in FIG. 10 are denoted by the same reference numerals, and description thereof will be omitted here, and only differences from FIG. 10 will be described.

12 is different from FIG. 10 in that the selection switching unit 113 in FIG.
In FIG. 12, output signals from the IF demodulation units IFD <b> 1 to IFDn are input to the addition unit 135, added by the addition unit 135, adjusted in amplitude, and output to the multiple demodulation unit 25. However, the reference oscillators 44 of the IF modulation units IFM1 to IFMn synchronize the phases of the generated reference signals, respectively, and the reference oscillators 70 of the IF demodulation units IFD1 to IFDn synchronize the phases of the generated reference signals, respectively. Shall.

  As described above, in the elevator radio communication system apparatus according to the third embodiment, the signals demodulated by the IF demodulation units IFD1 to IFDn are added by the adding unit 135 and the amplitude is adjusted. Multiple demodulation was performed. Therefore, by adding the same multiplexed signal of each channel, a stable signal can be received without being affected by the state of the wireless transmission path for each channel.

Embodiment 4 FIG.
As means for preventing interference, wireless transmission by the elevator-side wireless communication device and the elevator control-side wireless communication device is performed using at least one channel, and is switched to another channel at the transmission timing of the video signal, audio signal, and data signal. The data may be transmitted, and this is the fourth embodiment of the present invention.
The schematic configuration diagram showing an example of an elevator radio communication system apparatus according to Embodiment 4 of the present invention is an elevator-side radio communication apparatus 141 as the elevator-side radio communication apparatus 141 in FIG. Since the communication device 12 is the elevator control side wireless communication device 142 and the elevator wireless communication system device 15 of FIG.

  FIG. 13 is a block diagram illustrating a configuration example of the elevator-side radio communication device 141 and the elevator control-side radio communication device 142 of the elevator radio communication system according to the fourth embodiment of the present invention. Since the elevator side wireless communication device 141 and the elevator control side wireless communication device 142 have the same configuration, FIG. 13 shows the elevator side wireless communication device 141 as an example. Further, in FIG. 13, the same components as those in FIG. 2 are denoted by the same reference numerals, and description thereof will be omitted here, and only differences from FIG. 2 will be described.

  13 differs from FIG. 2 in that the modulation CH control unit 143 that controls the oscillation frequency of the oscillator 41 in the IF modulation unit 22 and the elevator-side system device 3 with respect to the modulation CH control unit 143 are different. A switching pattern generation unit 144 that changes the oscillation frequency of the oscillator 41 in a predetermined pattern in synchronization with the video signal of the above, a demodulation CH control unit 146 that controls the oscillation frequency of the oscillator 67 in the IF demodulation unit 24, The demodulating CH control unit 146 is provided with a switching pattern synchronization unit 147 that changes the oscillation frequency of the oscillator 67 in a predetermined pattern in synchronization with the synchronization signal in the video signal demodulated by the multiple demodulation unit 25. .

  In FIG. 13, when transmitting a signal from the elevator side system apparatus 3, the video signals output from the elevator side system apparatus 3 are respectively output to the multiplex modulation unit 21 and the switching pattern generation unit 144, and the switching pattern generation unit 144. Causes the modulation CH control unit 143 to change the oscillation frequency of the oscillator 41 in the IF modulation unit 22 in accordance with a predetermined switching pattern at a timing synchronized with the video signal input from the elevator side system device 3.

  The modulation CH control unit 143 changes the oscillation frequency of the oscillator 41 according to the switching pattern input from the switching pattern generation unit 144. Therefore, the IF modulation unit 22 switches the frequency of the multiplexed signal input from the multiplexing modulation unit 21 to a different channel according to a predetermined switching pattern output from the switching pattern generation unit 144, thereby converting the RF frequency. To the unit 23. The RF frequency converter 23 wirelessly transmits the signal input from the IF modulator 22 using a predetermined millimeter wave.

  On the other hand, the video signal demodulated by the multiplex demodulator 25 is output to the elevator side system device 3 and the switching pattern synchronization unit 147, respectively. The switching pattern synchronization unit 147 is a synchronization signal of the video signal input from the multiplex demodulation unit 25. The demodulating CH control unit 146 changes the oscillation frequency of the oscillator 67 in the IF demodulating unit 24 in accordance with the same switching pattern as the switching pattern generating unit 144 at a timing synchronized with the above.

  The demodulation CH control unit 146 changes the oscillation frequency of the oscillator 67 according to the switching pattern input from the switching pattern synchronization unit 147. From this, the IF demodulator 24 performs FM demodulation on the received signal input from the RF frequency converter 23 for each different channel according to the switching pattern output from the switching pattern synchronizer 147, and performs multiple demodulation. To the unit 25. In this way, the reception channel is switched following the channel switching pattern on the transmission side. In the description of FIG. 13, the case where the channel is switched in a fixed pattern has been described as an example. However, the switching may be performed in a regular random pattern.

  In FIG. 13, the example applied to the case of the first embodiment has been described, but the present invention can also be applied to the case of the second embodiment. In this case, the modulation CH control unit 143 controls the oscillation frequency for the respective oscillators 41 of the IF modulation units IFM1 to IFMn. The switching pattern generation unit 144 has at least one combination pattern of each channel for each of the IF modulation units IFM1 to IFMn, and switches the combination sequentially or randomly using the modulation CH control unit 143.

  On the other hand, the demodulation CH control unit 146 controls the oscillation frequency for the respective oscillators 67 of the IF demodulation units IFD1 to IFDn. Further, the switching pattern synchronization unit 147 has the same channel combination pattern for each IF modulation unit IFD1 to IFDn as the channel combination pattern for each IF modulation unit IFM1 to IFMn, and uses the demodulation CH control unit 146. The reception channel combination is switched following the combination pattern of each channel on the transmission side.

  As described above, the elevator radio communication system apparatus according to the fourth embodiment performs radio transmission by the elevator-side radio communication apparatus 141 and the elevator control-side radio communication apparatus 142 using at least one channel, and a video signal. The multiplexed signal of the audio signal and the data signal is transmitted by switching to a different channel at the timing synchronized with the video signal. As a result, the same effects as those of the first embodiment can be obtained, and interference can be prevented.

Embodiment 5 FIG.
The elevator wireless communication system apparatus shown in the first embodiment is provided with a function of performing wireless transmission of high-speed data signals composed of digital data for performing high-speed digital transmission used in a building LAN or the like. This may be the fifth embodiment of the present invention.
A schematic configuration diagram showing an example of an elevator radio communication system apparatus according to Embodiment 5 of the present invention is an elevator-side radio communication apparatus 201 as an elevator-side radio communication apparatus 201 in FIG. The communication device 12 is the same as that shown in FIG. 1 except that the elevator control-side wireless communication device 202 is used and the elevator wireless communication system 15 shown in FIG.

  FIG. 14 is a block diagram showing a configuration example of the elevator-side radio communication device 201 and the elevator control-side radio communication device 202 of the elevator radio communication system according to the fifth embodiment of the present invention. Since the elevator side wireless communication device 201 and the elevator control side wireless communication device 202 have the same configuration, FIG. 14 shows the elevator side wireless communication device 201 as an example. Further, in FIG. 14, the same components as those in FIG. 2 are denoted by the same reference numerals, and description thereof is omitted here, and only differences from FIG. 2 are described.

  14 differs from FIG. 2 in that a high-speed data modulation unit 210 that modulates a high-speed data signal from the elevator-side system device 3 and a high-speed data demodulation unit 211 that demodulates the received high-speed data signal are provided. 2 modulates a preset signal of the signal input from the multiplex modulation unit 21 and the signal input from the high-speed data modulation unit 210 to an intermediate frequency, as shown in FIG. The IF demodulator 24 outputs the received signal converted to the intermediate frequency to either one of the multiple demodulator 25 or the high-speed data demodulator 211 set in advance. For these reasons, the IF modulation unit 22 in FIG. 2 is replaced with the IF modulation unit 212, and the IF demodulation unit 24 in FIG. 2 is replaced with the IF demodulation unit 213.

  In FIG. 14, the elevator-side wireless communication apparatus 201 includes an antenna 5, a multiplex modulation unit 21, a high-speed data modulation unit 210, a high-speed data demodulation unit 211, an IF modulation unit 212, an RF frequency conversion unit 23, an IF demodulation unit 213, and a multiple demodulation. The unit 25 is configured. The high-speed data modulation unit 210 modulates the high-speed data signal from the elevator side system device 3 and outputs it to the IF modulation unit 212.

FIG. 15 is a block diagram illustrating a configuration example of the high-speed data modulation unit 210 of FIG.
In FIG. 15, the high-speed data modulation unit 210 includes a high-frequency emphasis unit 221 and an amplitude adjustment unit 222, and a high-frequency data signal transmitted from the elevator-side system device 3 After the band is emphasized, the amplitude is adjusted by the amplitude adjusting unit 222 and output to the IF modulating unit 212.

  IF modulation section 212 performs modulation to an intermediate frequency only on a preset signal among signals input from multiple modulation section 21 and signals input from high-speed data modulation section 210. The IF demodulator 213 outputs the received signal converted to the intermediate frequency to a preset one of the multiplex demodulator 25 and the high-speed data demodulator 211. The high-speed data demodulator 211 removes the high-frequency part emphasized from the intermediate frequency signal demodulated by the IF demodulator 213 and restores the original signal, and then outputs it to the elevator-side system device 3.

  In such a configuration, when the elevator radio communication system device 205 is used in an in-building LAN or the like and performs radio transmission of a high-speed data signal, the IF modulation unit 212 receives the signal input from the high-speed data modulation unit 210. And preset to modulate to an intermediate frequency. At the same time, IF demodulator 213 is set in advance to output a signal obtained by demodulating the received intermediate frequency received signal to high-speed data demodulator 211. On the other hand, when the elevator radio communication system 205 does not wirelessly transmit a high-speed data signal, the IF modulation unit 212 preliminarily modulates the signal input from the multiple modulation unit 21 to an intermediate frequency. Is set. At the same time, IF demodulator 213 is set in advance to output a signal obtained by demodulating the received intermediate frequency received signal to multiplex demodulator 25.

  As described above, the elevator radio communication system apparatus according to the fifth embodiment demodulates a high-speed data modulation unit 210 that modulates a high-speed data signal used in a LAN and the like and a high-speed data signal obtained by demodulating the received signal. The high-speed data demodulator 211 is provided, and the output destination of the signal input to the IF modulator 212 and the signal demodulated by the IF demodulator 213 is set in advance according to the use conditions. As a result, the same effect as in the first embodiment can be obtained, and a multiplexed signal obtained by multiplexing a video signal, an audio signal, and a data signal and a high-speed data signal used in a building LAN or the like can be switched. Wireless transmission can be performed and it can be adapted to various usage conditions.

  In the fifth embodiment, the multiplex signal generated by the multiplex modulation unit 21 may be converted into high-speed data by an A / D converter or the like and wirelessly transmitted as a high-speed data signal.

BRIEF DESCRIPTION OF THE DRAWINGS It is the schematic block diagram which showed the example of the radio | wireless communications system apparatus for elevators in Embodiment 1 of this invention. It is the block diagram which showed the structural example of the elevator side radio | wireless communication apparatus 4 of FIG. FIG. 3 is a block diagram illustrating a configuration example of a multiplex modulation unit 21 in FIG. 2. FIG. 3 is a block diagram illustrating a configuration example of an IF modulation unit 22 in FIG. 2. 6 is a diagram illustrating an example of a spectrum of a multiplexed FM modulation signal output from an IF modulation unit 22. FIG. FIG. 3 is a block diagram illustrating a configuration example of an RF frequency conversion unit 23 in FIG. 2. FIG. 3 is a block diagram illustrating a configuration example of an IF demodulation unit 24 in FIG. 2. FIG. 3 is a block diagram illustrating a configuration example of a multiplex demodulator 25 in FIG. 2. It is the figure which showed the example of the radome used for the radio | wireless communications system apparatus for elevators of FIG. It is the block diagram which showed the structural example of the elevator side radio | wireless communication apparatus of the radio | wireless communication system apparatus for elevators in Embodiment 2 of this invention. It is the block diagram which showed the other structural example of the elevator side radio | wireless communication apparatus of the radio | wireless communication system apparatus for elevators in Embodiment 2 of this invention. It is the block diagram which showed the structural example of the elevator side radio | wireless communication apparatus of the radio | wireless communication system apparatus for elevators in Embodiment 3 of this invention. It is the block diagram which showed the structural example of the elevator side radio | wireless communication apparatus of the radio | wireless communication system apparatus for elevators in Embodiment 4 of this invention. It is the block diagram which showed the structural example of the elevator side radio | wireless communication apparatus of the radio | wireless communication system apparatus for elevators in Embodiment 5 of this invention. FIG. 15 is a block diagram illustrating a configuration example of a high-speed data modulation unit 210 in FIG. 14.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Elevator basket, 3 Elevator side system apparatus, 4,101,121,131,141,201 Elevator side radio | wireless communication apparatus, 5,11 Antenna, 12 Elevator control side radio | wireless communication apparatus, 14 Elevator control room, 21 Multiplex modulation part, 22, IFM1 to IFMn, 212 IF modulator, 23 RF frequency converter, 24, IFD1 to IFDn, 213 IF demodulator, 25 multiple demodulator, 91 radome, 110 first distributor, 111 combiner, 112 second distributor , 113 selection switching unit, 125 selection unit, 126 switching determination unit, 135 addition unit, 143 modulation CH control unit, 144 switching pattern generation unit, 146 demodulation CH control unit, 147 switching pattern synchronization unit, 210 high-speed data modulation Part 211 high-speed data Tone portion.

Claims (2)

Between the elevator side wireless communication device provided in the elevator car and the elevator control side wireless communication device connected to the elevator control room that monitors the operation of the elevator, from various devices provided in the elevator car and the elevator control room, respectively. In an elevator radio communication system that wirelessly transmits each of the video signal, audio signal, and various control signals,
The elevator-side wireless communication device and the elevator control-side wireless communication device multiplex each signal and perform wireless transmission in both directions, and the multiplexed signal is converted into a plurality of channels with a predetermined switching pattern synchronized with the video signal. A radio communication system for an elevator characterized by switching and transmitting, and demodulating a multiplexed signal by switching a channel of the received signal according to the predetermined switching pattern. Between the elevator side wireless communication device provided in the elevator car and the elevator control side wireless communication device connected to the elevator control room that monitors the operation of the elevator, from various devices provided in the elevator car and the elevator control room, respectively. In an elevator radio communication system that wirelessly transmits each of the video signal, audio signal, and various control signals,
The elevator-side radio communication device and the elevator control-side radio communication device multiplex each signal and perform radio transmission in both directions. From the multiplexed signal and various devices provided in the elevator car and the elevator control room, respectively. A wireless communication system for an elevator which performs bidirectional wireless transmission by switching between high-speed data signals composed of digital data for performing high-speed digital transmission.

Images