JP2001341951A - Radiocommunication system device for elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a radiocommunication system device for an elevator suitable for an actual environment for operating the elevator by radio transmission without being influenced by the other radio equipment. SOLUTION: Respective antennas 5 and 11 connect an elevator car 1 and an elevator control room 14 in both directions by radio transmission by a set of opposed radiocommunication devices 4 and 12 for the elevator, and a video signal, an audio signal and a data signal are multiplexed, and are simultaneously transmitted in both directions by radio transmission, and the respective antennas 5 and 11 of the radiocommunication devices 4 and 12 for the elevator, respective parts of the radiocommunication devices 4 and 12 including the antennas 5 and 11 or the respective wholes of the radiocommunication devices 4 and 12 are respectively covered with a ray dome.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio communication system for an elevator for communicating with an elevator car, and more particularly to a radio system for transmitting signals such as video, audio and control signals to and from an elevator car. The present invention relates to an elevator radio communication system device including a communication device.

[0002]

2. Description of the Related Art As a conventional elevator radio communication device, Japanese Patent Application Laid-Open No. 63-282076 discloses a radio device for a skewed elevator. JP-A-63-28207
In Japanese Patent Application Laid-Open No. 6-206, a car-side antenna 14 provided on the elevator car side and a machine-room antenna 1 provided on the machine room side are disclosed.
5 that communicates using millimeter waves of 50 GHz to transmit and receive driving status message signals, and that transmits and receives images and sounds using a microphone, a speaker, a video camera, and a monitor television. Is disclosed.

[0003]

However, in such a conventional elevator radio communication device, a communication method of video, audio, and control signals has not been studied, and a communication method is specified for actual operation. And that no consideration is given to radio interference.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and multiplexes a plurality of signals between an elevator car and an elevator control room to perform bidirectional wireless transmission and a radome. The purpose of the present invention is to obtain an elevator radio communication system suitable for a real environment in which an elevator is operated wirelessly by preventing interference with other radio devices by preventing interference with other radio waves. I do.

[0005]

SUMMARY OF THE INVENTION An elevator radio communication system according to the present invention comprises an elevator radio communication device provided in an elevator car and an elevator control radio connected to an elevator control room for monitoring the operation of the elevator. Between the communication device, video signals from various devices provided respectively in the elevator car and the elevator control room,
In an elevator radio communication system device for wirelessly transmitting each signal of an audio signal and various control signals, the elevator side radio communication device and the elevator control side radio communication device multiplex the above signals and perform bidirectional radio transmission. Is what you do.

According to a first aspect of the present invention, there is provided an elevator radio communication system, wherein the elevator side radio communication device and the elevator control side radio communication device are configured as follows.
When performing wireless transmission of each signal, the audio signal and various control signals are frequency-modulated at different carrier frequencies, and then added to the video signal at a constant amplitude ratio, and a predetermined carrier is frequency-modulated with the added signal. Multiplexing.

According to a second aspect of the present invention, there is provided an elevator radio communication system, wherein the elevator side radio communication device and the elevator control side radio communication device are configured as follows.
The low-frequency cutoff frequency of the audio signal and / or various control signals is transmitted as a DC component.

According to a second aspect of the present invention, there is provided an elevator radio communication system, wherein the elevator side radio communication device and the elevator control side radio communication device are provided with an audio signal and various control signals. The amplitude value of each carrier in is added at a predetermined ratio,
The amplitude value of each carrier in the audio signal and various control signals is made smaller than the amplitude value of the video signal.

In the elevator radio communication system according to the present invention, the elevator side radio communication device and the elevator control side radio communication device combine various signals according to any one of claims 1 to 4. A multiplex modulator for multiplexing, an IF modulator for modulating a signal multiplexed by the multiplex modulator at a predetermined intermediate frequency, and a carrier frequency conversion for converting the signal modulated by the IF modulator to a predetermined carrier frequency Unit, a transmitting and receiving antenna for transmitting a signal converted by the carrier frequency converting unit, an intermediate frequency converting unit for converting a signal received from the transmitting and receiving antenna to a predetermined intermediate frequency, and a signal converted by the intermediate frequency converting unit And a multiplex demodulation unit for demodulating the multiplexed signal demodulated by the IF demodulation unit into various signals. .

[0010] In the elevator radio communication system according to the present invention, the elevator-side radio communication device and the elevator control-side radio communication device according to any one of claims 1 to 4, wherein the multiplexed signal comprises a plurality of multiplexed signals. , And simultaneously transmit them, and demodulate the multiplexed signal by selecting any one of the received multiplexed signals of each channel.

According to the present invention, there is provided an elevator radio communication system according to any one of the first to fourth aspects, wherein the elevator side radio communication device and the elevator control side radio communication device transmit a plurality of multiplexed signals. , And simultaneously transmits the signals, and adds the received multiplexed signals of the respective channels to demodulate the multiplexed signals.

[0012] In the elevator radio communication system according to the present invention, the elevator-side radio communication device and the elevator control-side radio communication device according to any one of Claims 1 to 4, wherein: A plurality of channels are switched by a predetermined switching pattern synchronized with the video signal and transmitted, and the received signal is switched by the predetermined switching pattern to demodulate a multiplexed signal.

According to the present invention, there is provided an elevator radio communication system according to any one of the first to fourth aspects, wherein the elevator side radio communication device and the elevator control side radio communication device comprise: A high-speed data signal composed of digital data for high-speed digital transmission from various devices provided in an elevator car and an elevator control room is switched to perform bidirectional wireless transmission.

According to the present invention, there is provided an elevator radio communication system according to any one of the first to fourth aspects, wherein the elevator side radio communication device and the elevator control side radio communication device transmit the multiplexed signal by two times. In addition to the value conversion, wireless transmission is performed bidirectionally as a high-speed data signal for performing high-speed digital transmission.

According to the present invention, there is provided an elevator radio communication system according to any one of the first to tenth aspects, wherein the elevator side radio communication apparatus and the elevator control side radio communication apparatus have transmission / reception antennas respectively provided to each other. Radio waves used for transmission and reception are provided at opposing positions and have linear polarization.

Further, in the elevator radio communication system according to the present invention, in claim 11, each of the transmitting and receiving antennas has a radome for preventing radio waves from entering from a line-of-sight angle. The transmission and reception antennas are formed of a material having a low loss with respect to the radio wave in the transmission and reception direction of the radio waves, and are formed of a material which blocks the radio waves in the direction of entry of the other radio waves.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described in detail based on an embodiment shown in the drawings. Embodiment 1 FIG. FIG. 1 is a schematic configuration diagram showing an example of an elevator radio communication system according to Embodiment 1 of the present invention. In FIG. 1, an elevator car 1 includes an elevator system device 3 formed by connecting a video camera, a microphone, a speaker, a monitor television, and the like to a control panel. The elevator-side system device 3 is connected to an elevator-side wireless communication device 4 provided above the elevator car 1, and the elevator-side wireless communication device 4 includes a transmitting / receiving antenna (hereinafter, referred to as an antenna) 5. I have.

On the other hand, an elevator control side radio communication device 12 having an antenna 11 at a position facing the antenna 5 of the elevator side radio communication device 4 is provided above the elevator shaft. The device 12 is connected via a control panel 13 to an elevator control room 14 for monitoring the operation of the elevator. The elevator radio communication system 15 includes an elevator radio communication device 4 and an elevator control radio communication device 12, and the elevator radio communication device 4 and the elevator control radio communication device 12 use millimeter waves. By performing wireless communication in two directions, the elevator car 1 and the elevator control room 14 are wirelessly connected in two directions.

In this manner, various control information such as video, audio, and data in the elevator car 1 can be obtained and confirmed in the elevator control room 14 side. Various control information such as video, audio, and data can be obtained in the elevator car 1 from the data control room 14 side. By doing so, it becomes possible to omit the cables or trolleys conventionally used in the elevator shaft.
When the antenna 11 is provided below the elevator shaft, the antenna 5 may be provided below the elevator car 1.

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. The elevator side radio communication device 4 and the elevator control side radio communication device 12 Because of the same configuration, FIG. 2 illustrates the elevator-side wireless communication device 4 as an example. 2, the elevator side radio communication device 4 includes an antenna 5, a multiplex modulation unit 21, an IF (Inte
rmediary Frequency) modulation unit 22, RF (Radio Freque
ncy) It is composed of a frequency converter 23, an IF demodulator 24 and a multiplex demodulator 25.

The multiplex modulator 21 combines and multiplexes video, audio, and data signals from the elevator side system device 3, and the IF modulator 22 controls the multiplex modulator 2.
The signal multiplexed in step 1 is modulated 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
The millimeter wave received by the antenna 5 is converted into an intermediate frequency and
Output to the F 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 multiplex demodulator 25 demodulates the signal by the IF demodulator 24. The multiplexed signal is separated into video, audio and data signals. The video, audio, and data signals obtained by the separation are output from the multiplex demodulation unit 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 showing a configuration example of the multiplex modulation section 21 of FIG. In FIG. 3, multiplex modulation section 2
Reference numeral 1 denotes a first to third high-frequency emphasizing units 31 to 33, a voice / data trap unit 34, a first FM modulation unit 35, and a second FM
The modulation section 36 includes a modulation section 36, first to third amplitude adjustment sections 37 to 39, and an addition section 40. First to third high-frequency emphasis unit 3
In the video signal, the audio signal, and the data signal transmitted from the elevator-side system device 3, the high-frequency band is emphasized for the corresponding signals.

The first FM modulator 35 performs FM modulation of the audio signal, which has been subjected to high-frequency emphasis by the second high-frequency emphasis unit 32, using, for example, a 5.5 MHz carrier.
The M modulation section 36 converts the data signal, which has been subjected to high-frequency emphasis by the third high-frequency emphasis section 33, into F
Perform M modulation. As described above, the first FM modulator 34 and the second FM modulator 35 use the carrier waves of different frequencies to
Perform M modulation.

On the other hand, the voice / data trap section 34 removes a predetermined frequency band from the video signal on which the high frequency band has been emphasized by the first high band emphasizing section 31. That is,
Since the high frequency region of the video signal increases in the first high-frequency emphasizing unit 31, the voice / data trap unit 24 removes the frequency band of the video signal which is the same as the carrier of the audio signal and the data signal. By doing so, the audio signal and the data signal subjected to the FM modulation are not disturbed at the high frequency of the video signal.

The video signal output from the audio / data trap section 34 is adjusted in amplitude by the first amplitude adjustment section 37 and output to the addition section 40. The audio signal FM-modulated by the first FM modulator 35 is adjusted by a second amplitude adjuster 38, and the data signal FM-modulated by the second FM modulator 36 is adjusted by a third amplitude adjuster 39. After that, it is output to the adder 40. Adder 40
Is the video signal input from the first amplitude adjustment unit 37,
By adding the audio signal from the second amplitude adjustment unit 38 and the data signal from the third amplitude adjustment unit 39, respectively, the video signal, the audio signal, and the data signal are multiplexed and output to the IF modulation unit 22.

FIG. 4 is a block diagram showing an example of the configuration of the IF modulation section 22 shown in FIG. 2 for modulating the signal multiplexed by the multiplex modulation section 21 to an intermediate frequency. In FIG.
The modulation unit 22 includes an oscillator 41, a frequency divider 42, a phase comparator 4
3, reference oscillator 44, LPF (low-pass filter) 4
5, adder 46, and BPF (bandpass filter) 4
7 constitutes a frequency synthesizer. For example, an output signal output from an oscillator 41 serving as a voltage-controlled oscillator is output to an RF frequency conversion unit 23 via a BPF 47, and is also frequency-divided by a frequency divider 42 at a predetermined frequency division ratio. 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 modulator 21 and outputs the result to the oscillator 41. The oscillator 41 responds to the signal input from the adder 46. And generates and outputs a signal of the specified frequency. Therefore, the multiplexed signal input from the multiplex modulation unit 21 is added to the output signal of the LPF 45 by the adder 36, whereby the multiplexed and modulated FM signal modulated at the intermediate frequency can be obtained.

FIG. 5 is a diagram showing an example of the spectrum of the multiplexed FM modulated signal output from the IF modulator 22. The video carrier serving as the intermediate frequency has two waves for performing bidirectional communication, and here, for example, 1.55 GHz and 2.55 GHz.
05 GHz. The audio carrier and the data carrier are both sidebands around this video carrier. NT
+3.5 for the frequency of the video carrier for the SC signal
Since there is always a color carrier at the frequencies of 8 MHz and -3.58 MHz, a beat frequency appears in the NTSC band because the color carrier, the audio carrier and the data carrier are added. This causes beat fringes to appear in the video, deteriorating the video quality.

In order to prevent the beat fringe, the levels of the audio carrier and the data carrier are adjusted by the second amplitude adjuster 38 and the third amplitude adjuster 39 of the multiplex modulator 21. At present, the level of the audio carrier is lower than that of the video carrier by 15 to 20 dB, and the level of the data carrier is lower by 20 to 25 dB.

The setting of the carrier level is determined from the performance of the receiver. Video signal reception S / N ratio is 40d
The communication distance that can secure B is set to the maximum communication distance, and the levels of the audio carrier and the data carrier are adjusted so that the reception S / N ratio of the audio signal and the data signal at this time becomes a value required as a device. For example, the S / N ratio of 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 is changed according to the requirements of the elevator system, and the S / N of the audio signal and the data signal is changed.
The ratio may be reversed from the setting described above.

FIG. 6 is a block diagram showing an example of the configuration of the RF frequency converter 23 shown in FIG. 6, the RF frequency conversion unit 23 includes an IF transmission BPF 51, a transmission mixer 52, a millimeter wave transmission BPF 53, and a circulator 5.
4. Millimeter wave reception BPF 55, reception mixer 56, IF
It comprises a receiving BPF 57, 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 oscillator 5
9 is output from the directional coupler 58 to the millimeter wave signal.
After being distributed, it is input to the transmission mixer 52. The transmission mixer 52 is an up-converter, mixes the intermediate frequency signal input from the IF modulation unit 22 via the IF transmission BPF 51 with the above-mentioned millimeter wave signal, converts the frequency into a millimeter wave, and The transmitting millimeter wave is supplied to the antenna 5 through the wave transmitting BPF 53 and the circulator 54. The transmitting millimeter wave is transmitted from the antenna 5.

The receiving millimeter wave received by the antenna 5 is supplied to the circulator 54 and the millimeter wave receiving BPF 55.
, Is input to a reception mixer 56 forming a down converter, is converted into an intermediate frequency by the reception mixer 56, and is output to the IF demodulation unit 24 via an IF reception BPF 57. On the other hand, the center frequencies of the IF transmission BPF 51 and the millimeter wave transmission BPF 53 and the center frequencies of the millimeter wave reception BPF 55 and the IF reception BPF 57 are, for example, 50.
The difference is made 0 MHz so that the radio wave on the transmitting side does not enter the receiving side.

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. Further, in order to improve the output level or noise level of the reception wave, the millimeter wave reception BPF 55 is used.
You can insert an amplifier for amplification before and after
An amplification amplifier may be inserted before and after 57.

FIG. 7 is a block diagram showing an example of the configuration of the IF demodulation unit 24 shown in FIG. 7, the IF demodulation unit 24 includes a first BPF 61, a first amplifier 62, a mixer (mixer) 63, a second BPF 64, a second amplifier 65, F
It comprises an M demodulator 66 and a frequency synthesizer 72 comprising an oscillator 67, a frequency divider 68, a phase comparator 69, a reference oscillator 70 and an LPF 71.

In such a configuration, the received signal converted into an intermediate frequency signal by the RF frequency converter 23 and output is amplified by the first amplifier 62 via 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 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 intermediate frequency reception signal.

The signal output from the mixer 63 is the second B
After being amplified by the second amplifier 65 via the PF, it is demodulated by the FM demodulator 66 and output to the multiplex demodulation unit 25. In addition,
When the demodulation frequency of the FM demodulator 66 is
The mixer 63 and the frequency synthesizer 72 may be deleted as long as they can handle the same frequency as the received signal of the intermediate frequency obtained from. The second BPF 64 has a band through which the multiplex modulation spectrum shown in FIG. 5 passes, and this band corresponds to one transmission channel.

FIG. 8 is a block diagram showing a configuration example of the multiplex demodulation unit 25 in FIG. 8, the multiplex demodulation unit 25 includes a distributor 81 and a voice / data trap unit 8.
2, the first high-frequency removing unit 83, BP for audio signal carrier wave
F84, audio signal FM demodulator 85, second high-frequency remover 86, data signal carrier BPF 87, data signal F
An M demodulator 88 and a third high-frequency remover 89 are provided. In such a configuration, the multiplexed signal input from the IF demodulation unit 24 is distributed by the distributor 81 into a video signal, an audio signal, and a data signal.

The video signal distributed by the distributor 81 is converted by the audio / data trap unit 82 into carrier components of the audio signal and the data signal, in this case, 5.5 MHz.
And the 6.5 MHz component are removed, and the high-frequency part emphasized at the time of the multiplex modulation is restored by the first high-frequency removing unit 83. By doing so, it is possible to reduce triangular noise peculiar to FM modulation. Next, the signal whose high-frequency portion 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 device 3 as digital data using a rectangular wave instead of the video signal.

The audio signal distributed by the distributor 81 is subjected to FM demodulation by an audio signal FM demodulation unit 85 after an audio modulation component is extracted by an audio signal carrier BPF 84. Further, the audio signal demodulated by the audio signal FM demodulation unit 85 is transmitted to the elevator-side system device 3 after the high-frequency part emphasized at the time of the multiplex modulation is restored by the second high-frequency removal unit 86. Will be played. At present, the DC component is cut based on the transmission band (300 to 20 kHz) of the audio signal. However, since the DC component can be transmitted, a lower frequency band can be transmitted. The DC component need not be cut.

On the other hand, the data signal distributed by the distributor 81 is subjected to extraction of a data modulation component by the data signal carrier BPF 87 and then to a data signal FM demodulation unit 88.
Is FM-demodulated. Further, the data signal demodulated by the data signal FM demodulation unit 88 is transmitted to the elevator-side system device 3 after the high-frequency part emphasized at the time of the multiplex modulation is restored by the third high-frequency removal unit 89. . The data signal has substantially the same transmission band as the audio signal, but has a value of “1”.
Alternatively, since the data signal of “0” is continuously transmitted, the DC component is also transmitted.

As described above, by preparing the above-described elevator side radio communication device 4 and the elevator control side radio communication device 12 similar to the elevator side radio communication device 4, the video, audio and data signals can be bidirectionally transmitted.・ Can be transmitted in real time. Note that one of the elevator side wireless communication device 4 and the elevator control side wireless communication device 12 may be operated as a transmitter and the other as a receiver. When the above-mentioned wireless communication devices are installed on adjacent elevator shafts, the wireless channels are changed so as not to interfere with each other, and the antennas 5 are arranged so that the polarization directions of the antennas 5 are 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.
Alternatively, it is also possible to further increase the number of multiplexes by narrowing the interval between multiplexed carrier waves.

Here, the antennas 5 and 11 of the radio communication devices 4 and 12 for elevators using millimeter waves have a gain of 20.
Therefore, the aperture angles of the antennas 5 and 11 have an angle of several tens to several degrees. The antennas 5 and 11 of the radio communication devices 4 and 12 for elevators are
Since the communication direction is set to be vertically opposed, the communication direction is vertical propagation. On the other hand, other wireless systems using millimeter waves, such as inter-building communication systems, automobile radars, road-to-vehicle communication, and inter-vehicle communication are expected to increase in the future, and these are likely to be configured by horizontal propagation of the communication direction. . From this, it is conceivable that a radio wave emitted from another wireless system may be an interference wave for a wireless communication device for an elevator.

In order to reduce the influence from other radio systems, radio communication devices 4 and 1 for elevators are used.
2, each of the antennas 5 and 11, a part of the wireless communication devices 4 and 12 including the antennas 5 and 11, or the wireless communication devices 4 and 1
2 may be covered with a radome as shown in FIG. Note that FIG. 9 illustrates the elevator-side wireless communication device 4 as an example, and the same applies to the case of the elevator-control-side wireless communication device 12, and a description thereof will be omitted.

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

Also, the elevator side radio communication device 4 and the elevator control side radio communication device 12
When installing, considering the direction and intensity of the millimeter wave arriving to cut off the millimeter wave propagation emitted from the horizontal direction or the millimeter wave propagation from a nearby building, radio waves 93 to 93 from the horizontal direction Radome 91 so that 95 is reflected
May be formed of metal or the like into a cylindrical shape. Since the millimeter wave has a high straightness, the direction of arrival of the radio wave is geometrically predicted by using the ray tracing method, and the radome 91 is set so that the antenna 5 and the wireless communication device 4 cannot be seen from the direction in which the radio wave arrives. Is determined.

As described above, the elevator radio communication system according to the first embodiment includes the antennas 5 and 1
The elevator car 1 and the elevator control room 14 are wirelessly and bidirectionally connected to each other by a pair of wireless communication devices 4 and 12 facing each other, and the video signal, the audio signal, and the data signal are multiplexed and simultaneously wirelessly transmitted in both directions. I did it. This allows the elevator control room to collectively confirm the video, audio, data, etc. in the elevator car, and
By installing a monitor TV on the elevator car side, video, audio, data, etc. from the elevator control room side can be collectively obtained on the elevator car side, eliminating the cable or trolley conventionally used in the elevator shaft be able to.

Further, radio communication devices 4 and 1 for elevators
Since each of the antennas 5 and a part of each of the wireless communication devices 4 and 12 including the antenna 5 or the entirety of each of the wireless communication devices 4 and 12 are covered with the radome 91, for example, an inter-building communication system, an automobile The effect of radio waves from other wireless systems using millimeter waves, such as radar, road-vehicle communication, and vehicle-to-vehicle communication, can be reduced, and the reliability of an elevator wireless communication system can be improved.

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

FIG. 10 shows an elevator radio communication device 101 and an elevator control radio communication device 10 of an elevator radio communication device according to Embodiment 2 of the present invention.
2 is a block diagram showing a configuration example of FIG. Elevator side wireless communication device 101 and elevator control side wireless communication device 1
02 has the same configuration, and FIG. 10 shows the elevator-side wireless communication device 101 as an example. Furthermore,
In FIG. 10, the same components as those in FIG. 2 are denoted by the same reference numerals,
Here, the description thereof will be omitted, and only differences from FIG. 2 will be described.

10 differs from FIG. 2 in that a plurality of IF modulators IFM1 to IFMn (n> 1 natural number) and a plurality of IF demodulators IFD1 to IFDn are provided, respectively. A first distribution unit 110 that distributes the power of the output signal;
A combining unit 111 that combines and outputs the signals output from the FMn, and a second distribution unit 112 that distributes the power of the reception signal output from the RF frequency conversion unit 23;
Selection switching section 113 for selecting and outputting one of the signals output from each of IF demodulation sections IFD1 to IFDn.
And has been provided.

In FIG. 10, the signal output from multiplex modulation section 21 is input to first distribution section 110, which distributes the power of the signal input from multiplex modulation section 21 to each IF. The signals are output to the modulators IFM1 to IFMn, respectively. The signals output from the IF modulation units IFM1 to IFMn are power-synthesized by the synthesis 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 other. Output to the IF demodulation units IFD1 to IFDn. Each signal output from each IF demodulation unit IFD1 to IFDn is input to the selection switching unit 113, and the selection switching unit 113
And outputs only the signal selected in accordance with the control signal from the multiplex demodulation unit 25. The multiplex demodulation unit 25 performs the same processing as the signal processing on the signal input from the IF demodulation unit 24 in FIG. 2 on the signal input from the selection switching unit 113.

The IF modulators IFM1 to IFMn have the same configuration as the IF modulator 22 shown in FIG.
Only the oscillation frequency of the oscillator 41 of FIG. 4 differs. For this reason, since the oscillation frequencies of the respective oscillators in the IF modulators IFM1 to IFMn are different from each other, the oscillators of the IF modulators IFM1 to IFMn are referred to as oscillators 41A1 to 41An. Note that the IF modulator IFM1
4 is the same as that of FIG. 4 except that the sign of the oscillator is changed.

The IF demodulation units IFD1 to IFDn are:
Each has the same configuration as that of the IF modulation section 24 shown in FIG. 7, but differs only in the oscillation frequency of the oscillator 67 in FIG. From this, the IF modulation units IFD1 to IFD
Since the oscillation frequencies of the respective oscillators in Dn are different, the respective oscillators of the IF modulators IFD1 to IFDn are referred to as oscillators 67A1 to 67An. Also, the oscillator 67A1
６７67An are oscillated by the corresponding IF modulator IF
The oscillation frequencies of the respective oscillators 41A1 to 41An of M1 to IFMn are the same. That is, the oscillator 41Am (m is
0 <m <n is a natural number) and the oscillation frequency of the oscillator 67Am is the same. Note that a block diagram showing a configuration example of the IF modulation units IFD1 to IFDn is the same as that in FIG.

In such a configuration, the IF modulator IF
Since the intermediate frequency for determining the transmission channel frequency is generated by M1 to IFMn, the multiplexed signal including the video signal, the audio signal, and the data signal is distributed to multiple channels by the first distributor 110, and the IF modulator IFM
An intermediate frequency for each channel is simultaneously generated by 1 to IFMn, and the RF frequency conversion unit 23 converts the frequency to a millimeter wave and performs wireless transmission on multiple channels.

On the other hand, the multi-channel millimeter-wave signal received by the antenna 5 is converted into an intermediate frequency by the RF frequency conversion unit 23, and is then power-divided by the second distribution unit 112 so that each of the IF demodulation units IFD1 to IFDn. Respectively.
Each of the IF demodulation units 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 the channel according to the control signal input from the elevator-side system device 3. The signal is output to the multiplex demodulation unit 25.

The multiplex demodulation unit 25 performs the same processing as the signal processing on the signal input from the selection switching unit 113 on the signal input from the IF demodulation unit 24 in FIG. The audio signal and the data signal are output to the elevator-side system device 3, respectively. In addition,
Although FIG. 10 shows a case where the same multiplexed signal is transmitted on multiple channels, different information may be transmitted for each channel.

Here, in FIG. 10, the multiplex demodulation unit 25 demodulates the signal selected by the selection switching unit 113 in accordance with the control signal from the elevator side system device 3, but in FIG. As shown, IF demodulation units IFD1 to IFD1
A signal having a good reception state may be automatically selected from the signals input from the IFDn, demodulated by the multiplex demodulation 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 the description thereof will be omitted and only the differences from FIG. 10 will be described.

The difference between FIG. 11 and FIG. 10 is that FIG.
0, and an IF demodulation unit IFD1
To a multiplex modulation section 25, and a signal output from the selection section 125 and subjected to high-frequency removal by the multiplex demodulation section 25, for example, a signal from a video signal. Is determined, and if the reception state is not good, the switching determination unit 12 that causes the selection unit 125 to output a signal of another channel to the multiplex modulation unit 25.
Accordingly, the elevator-side wireless communication device 101 in FIG. 10 is replaced by the elevator-side wireless communication device 121.

As described above, the elevator side radio communication device and the elevator control side radio communication device simultaneously transmit or receive the same multiplexed signal using a combination of a plurality of channels, and select a signal of a channel having a good reception state. Diversity to do.

As described above, the elevator radio communication system according to the second embodiment performs the radio transmission of the signal multiplexed by the multiplex modulation section 21 using a plurality of channels. The same effects as in the first embodiment can be obtained, and a channel having high reception quality without interference can be selected from a plurality of channels, and stable reception can be performed.

Embodiment 3 In the second embodiment, I
The multiplex demodulation is performed using one of the signals demodulated by the F demodulation units IFD1 to IFDn, but after the signals demodulated by the IF demodulation units IFD1 to IFDn are added and the amplitude is adjusted. The multiplex demodulation unit 25 may perform multiplex demodulation, and such a configuration is referred to as a third embodiment of the present invention. A schematic configuration diagram showing an example of an elevator radio communication system according to Embodiment 3 of the present invention is as follows. The elevator radio communication device 4 in FIG. 1 is an elevator radio communication device 131, and the elevator control radio in FIG. 1 is the same as FIG. 1 except that the communication device 12 is an elevator control-side wireless communication device 132 and the elevator wireless communication system device 15 in FIG.

FIG. 12 shows an elevator radio communication device 131 and an elevator control radio communication device 13 of an elevator radio communication device according to Embodiment 3 of the present invention.
2 is a block diagram showing a configuration example of FIG. Elevator side wireless communication device 131 and elevator control side wireless communication device 1
32 has the same configuration, FIG. 12 shows the elevator-side wireless communication device 131 as an example. Furthermore,
12, the same components as those in FIG. 10 are denoted by the same reference numerals, and the description thereof will be omitted, and only the differences from FIG. 10 will be described.

The difference between FIG. 12 and FIG. 10 is that FIG.
That is, the selection switching unit 113 of 0 is replaced with the addition unit 135. In FIG. 12, IF demodulation units IFD1 to IFD
Each output signal from n is input to the adder 135, added by the adder 135, adjusted in amplitude, and output to the multiplex demodulator 25. However, IF modulators IFM1 to IFM1
Each of the reference oscillators 44 of the IFMn synchronizes the phases of the generated reference signals with each other.
Each reference oscillator 70 of the IFDn synchronizes the phase of the generated reference signal.

As described above, the elevator radio communication system according to the third embodiment includes an IF demodulation unit IFD1
After the signals demodulated by .about.IFDn are added by the adder 135 to adjust the amplitude, the multiplex demodulator 25 performs multiplex demodulation. Thus, 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 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 a video signal, an audio signal, and a data signal. Transmission may be performed, and such a configuration is referred to as a fourth embodiment of the present invention. A schematic configuration diagram illustrating an example of an elevator radio communication system device according to Embodiment 4 of the present invention is as follows. The elevator side radio communication device 4 in FIG. 1 is referred to as an elevator side radio communication device 141, and the elevator control side radio communication device in FIG. The communication device 12 is an elevator control side wireless communication device 1
42, and the elevator radio communication system device 15 of FIG.
Since it is the same as FIG.

FIG. 13 shows an elevator radio communication device 141 and an elevator control radio communication device 14 of an elevator radio communication device according to Embodiment 4 of the present invention.
2 is a block diagram showing a configuration example of FIG. Elevator side radio communication device 141 and elevator control side radio communication device 1
Since 42 has the same configuration, FIG. 13 shows the elevator-side wireless communication device 141 as an example. Furthermore,
In FIG. 13, the same components as those in FIG. 2 are denoted by the same reference numerals,
Here, the description thereof will be omitted, and only differences from FIG. 2 will be described.

The difference between FIG. 13 and FIG. 2 is that the modulation CH control unit 143 for controlling the oscillation frequency of the oscillator 41 in the IF modulation unit 22 and the modulation CH control unit 1
A switching pattern generator 144 for changing the oscillation frequency of the oscillator 41 in a predetermined pattern in synchronism with a video signal from the elevator side system device 3 and a control of the oscillation frequency for the oscillator 67 in the IF demodulator 24. Demodulation CH control unit 146 for performing demodulation and demodulation CH control unit 1
Switching pattern synchronization section 147 for changing the oscillation frequency of oscillator 67 in a predetermined pattern in synchronization with the synchronization signal in the video signal demodulated by multiplex demodulation section 25 for 46.
And has been provided.

In FIG. 13, when a signal from the elevator side system device 3 is transmitted, a video signal output from the elevator side system device 3 is output to the multiplex modulation section 21 and the switching pattern generation section 144, respectively. The 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 according to a predetermined switching pattern at a timing synchronized with the video signal input from the elevator-side system device 3.

The modulation CH control section 143 changes the oscillation frequency of the oscillator 41 according to the switching pattern input from the switching pattern generating section 144. From this, IF
The modulator 22 switches the multiplexed signal input from the multiplexing modulator 21 to a different channel according to a predetermined switching pattern output from the switching pattern generator 144 and outputs the channel to the RF frequency converter 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 demodulation unit 25 is output to the elevator-side system device 3 and the switching pattern synchronization unit 147, respectively, and the switching pattern synchronization unit 147 outputs the video signal input from the multiplex demodulation unit 25. Switching pattern generator 1 at a timing synchronized with the synchronization signal of
In accordance with the same switching pattern as 44, the demodulation CH control unit 14
For 6, the oscillation frequency of the oscillator 67 in the IF demodulation unit 24 is changed.

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, IF
The demodulation unit 24 converts the received signal input from the RF frequency conversion unit 23 into FM signals for different channels according to the switching pattern output from the switching pattern synchronization unit 147.
The demodulation is performed and output to the multiplex demodulation unit 25. In this way, the receiving channel is switched according to the channel switching pattern on the transmitting side. In the description of FIG.
Although the case where channel switching is performed in a fixed pattern has been described as an example, switching may be performed in a regular random pattern.

In FIG. 13, the description has been made using an example applied to the above-described first embodiment.
It can also be applied to the case of In this case, the modulation C
The H control unit 143 controls the oscillation frequency of each oscillator 41 of each of the IF modulation units IFM1 to IFMn. The switching pattern generation section 144 has at least one combination pattern of each channel for each of the IF modulation sections IFM1 to IFMn.
3 is used to switch the combination sequentially or randomly.

On the other hand, the demodulation CH control unit 146
The oscillating frequency is controlled for each of the oscillators 67 of the demodulation units IFD1 to IFDn. The switching pattern synchronization section 147 has the same combination pattern of each channel for each IF modulation section IFD1 to IFDn as the combination pattern of each channel for each IF modulation section IFM1 to IFMn, and uses the demodulation CH control section 146. The combination of the receiving channels is switched following the combination pattern of each channel on the transmitting side.

As described above, the elevator radio communication system according to the fourth embodiment includes an elevator radio communication device 141 and an elevator control radio communication device 14.
2 is performed using at least one channel, and a multiplexed signal of a video signal, an audio signal, and a data signal is switched to a different channel at a timing synchronized with the video signal and transmitted. Thus, the same effect as in the first embodiment can be obtained, and interference can be prevented.

Embodiment 5 FIG. With respect to the elevator radio communication system shown in the first embodiment, the building L
A function of wirelessly transmitting a high-speed data signal composed of digital data used for high-speed digital transmission used in an AN or the like may be provided. This is referred to as a fifth embodiment of the present invention. A schematic configuration diagram showing an example of an elevator wireless communication system device according to Embodiment 5 of the present invention is as follows. The elevator wireless communication device 4 in FIG. 1 is an elevator wireless communication device 201, and the elevator control wireless device in FIG. Except that the communication device 12 is an elevator control-side wireless communication device 202 and the elevator wireless communication system device 15 of FIG.

FIG. 14 shows an elevator radio communication device 201 and an elevator control radio communication device 20 of an elevator radio communication device according to Embodiment 5 of the present invention.
2 is a block diagram showing a configuration example of FIG. Elevator side wireless communication device 201 and elevator control side wireless communication device 2
14 has the same configuration, FIG. 14 shows the elevator-side wireless communication device 201 as an example. Furthermore,
14, the same components as those in FIG. 2 are denoted by the same reference numerals,
Here, the description thereof will be omitted, and only differences from FIG. 2 will be described.

FIG. 14 differs from FIG. 2 in that a high-speed data modulator 210 for modulating a high-speed data signal from the elevator side system device 3 and a high-speed data demodulator 211 for demodulating a received high-speed data signal are provided. And that the IF modulator 22 in FIG. 2 modulates a preset signal of the signal input from the multiplex modulator 21 and the signal input from the high-speed data modulator 210 to an intermediate frequency. 2, the IF demodulation unit 24 outputs the received signal converted to the intermediate frequency to one of the multiplex demodulation unit 25 and the high-speed data demodulation unit 211 set in advance. From these facts, the IF of FIG.
The modulation unit 22 is changed to the IF modulation unit 212, and the IF demodulation unit 2 in FIG.
4 was used as the IF demodulation unit 213.

In FIG. 14, an elevator side radio communication apparatus 201 includes an antenna 5, a multiplex modulation section 21, a high-speed data modulation section 210, a high-speed data demodulation section 211, and an IF modulation section 2.
12, an RF frequency converter 23, an IF demodulator 213 and a multiplex demodulator 25. High-speed data modulator 21
0 modulates the high-speed data signal from the elevator-side system device 3 and outputs the modulated signal to the IF modulation unit 212.

FIG. 15 shows the high-speed data modulator 21 of FIG.
FIG. 2 is a block diagram showing an example of the configuration of 0. 15, the high-speed data modulation section 210 includes a high-frequency emphasis section 221 and an amplitude adjustment section 222. The high-speed data signal transmitted from the elevator-side system device 3 has a high-frequency After the band is emphasized, the amplitude is adjusted by the amplitude adjustment unit 222 and output to the IF modulation unit 212.

IF modulation section 212 modulates only the preset signal out of the signal input from multiplex modulation section 21 and the signal input from high-speed data modulation section 210 to the intermediate frequency. The IF demodulation unit 213
Converts the received signal converted to the intermediate frequency into a multiplex demodulator 25
And outputs it to the preset one of the high-speed data demodulation units 211. The high-speed data demodulation unit 211 removes the emphasized high-frequency portion from the intermediate frequency signal demodulated by the IF demodulation unit 213 and restores the signal, and outputs the signal to the elevator-side system device 3.

In such a configuration, when the elevator radio communication system 205 is used in a building LAN or the like and performs radio transmission of a high-speed data signal, the IF modulator 2
Reference numeral 12 is set in advance so that the signal input from the high-speed data modulator 210 is modulated to an intermediate frequency. At the same time, the IF demodulation unit 213 is preset so as to output a signal obtained by demodulating the received intermediate frequency received signal to the high-speed data demodulation unit 211. In contrast, the elevator radio communication system 205
Does not perform high-speed data signal wireless transmission, IF modulation section 212 is preset to modulate the signal input from multiplex modulation section 21 to an intermediate frequency.
At the same time, IF demodulation section 213 is preset so as to output a signal obtained by demodulating the received intermediate frequency received signal to multiplex demodulation section 25.

As described above, the elevator radio communication system according to the fifth embodiment includes a high-speed data modulating section 210 for modulating a high-speed data signal used in a LAN or the like, and a high-speed data obtained by demodulating a received signal. A high-speed data demodulation unit 211 for demodulating a signal is provided, and an output destination of a signal input to the IF modulation unit 212 and an output destination of a signal demodulated by the IF demodulation unit 213 are set in advance according to use conditions. Accordingly, 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 the L
Wireless transmission can be performed by switching high-speed data signals used in an AN or the like, and can be adapted to various use conditions.

In the fifth embodiment, the multiplexed signal generated by the multiplexing modulation section 21 may be converted into high-speed data by an A / D converter or the like, and wireless transmission may be performed as a high-speed data signal.

[0088]

According to a first aspect of the present invention, an elevator radio communication system multiplexes a video signal, an audio signal, and various control signals between an elevator radio communication device and an elevator control radio communication device. And the two-way wireless transmission allows a plurality of pieces of information to be collectively wirelessly transmitted between the interior of the elevator car and the elevator control room.

According to a second aspect of the present invention, in the elevator radio communication system according to the first aspect, the audio signal and the various control signals are frequency-modulated at different carrier frequencies, and then added to the video signal at a constant amplitude ratio. At the same time, a predetermined carrier is frequency-modulated and multiplexed with the added signal, so that the multiplexing can be performed in a fixed communication bandwidth.

According to a third aspect of the present invention, in the elevator radio communication system, the low frequency cutoff frequency of the audio signal and / or various control signals is transmitted as a DC component. Can be transmitted, the low frequency characteristics can be improved, and fixed logic can be transmitted in various control signals.

According to a fourth aspect of the present invention, there is provided an elevator radio communication system according to any one of the second and third aspects, wherein the amplitude values of the respective carrier waves in the audio signal and the various control signals are added at a predetermined ratio to obtain a video signal. The amplitude value of each carrier in the audio signal and various control signals is made smaller than the amplitude value of the signal. From this,
Deterioration of the video signal can be prevented.

The radio communication system for an elevator according to claim 5 is, in any one of claims 1 to 4, specifically, an elevator side radio communication device and an elevator control side radio communication device comprising: , An IF modulator, a carrier frequency converter, a transmitting / receiving antenna, an intermediate frequency converter, an IF demodulator, and a multiplex demodulator. For this reason, it is possible to multiplex the data into a certain communication bandwidth, and to collectively transmit a plurality of pieces of information wirelessly between the inside of the elevator car and the elevator control room.

According to a sixth aspect of the present invention, there is provided an elevator radio communication system according to any one of the first to fourth aspects, wherein the multiplexed signal is distributed to a plurality of channels and transmitted at the same time. One of the multiplexed signals is selected to demodulate the multiplexed signal. Therefore, stable signal reception can be performed by selecting a stable channel.

According to a seventh aspect of the present invention, there is provided an elevator radio communication system according to any one of the first to fourth aspects, wherein the multiplexed signal is distributed to a plurality of channels and transmitted at the same time. The multiplexed signals are added and demodulated. Thus, stable signal reception can be performed regardless of the state of the transmission path.

According to an eighth aspect of the present invention, there is provided an elevator radio communication system according to any one of the first to fourth aspects, wherein the multiplexed signal is switched to a plurality of channels in a predetermined switching pattern synchronized with a video signal and transmitted. At the same time, the multiplexed signal is demodulated by switching the channel of the received signal according to the predetermined switching pattern. From this, it is possible to prevent interference at the time of reception.

According to a ninth aspect of the present invention, there is provided an elevator radio communication system according to any one of the first to fourth aspects, comprising a multiplexed signal and digital data for high-speed digital transmission from an elevator car and an elevator control room. Switching between the configured high-speed data signal and bidirectional wireless transmission is performed. From this, LA in the building
Wireless transmission of a high-speed data signal used in N or the like can be performed, and can be adapted to various use conditions.

According to a tenth aspect of the present invention, there is provided an elevator radio communication system according to any one of the first to fourth aspects, wherein the multiplexed signal is binarized and a bidirectional signal is transmitted as a high-speed data signal for performing high-speed digital transmission. Wireless transmission. Therefore, wireless transmission using high-speed data signals used in a building LAN or the like can be performed.

An eleventh aspect of the present invention is directed to an elevator radio communication system according to any one of the first to tenth aspects, wherein the transmitting and receiving antennas are provided at opposing positions, and the radio waves used for transmitting and receiving are linearly polarized. It was made to have. From this, it is possible to prevent interference when adjacent elevators are provided with the same wireless communication device.

In a twelfth aspect of the present invention, in the elevator radio communication system according to the eleventh aspect, each of the transmitting and receiving antennas is provided with a radome for preventing a radio wave from entering from a line of sight angle. Accordingly, it is possible to prevent radio waves from entering the transmission / reception antenna from within the line-of-sight angle, prevent external contamination, and reduce the influence of external direct waves or indirect waves.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram illustrating an example of an elevator radio communication system device according to a first embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration example of an elevator-side wireless communication device 4 of FIG.

FIG. 3 is a block diagram illustrating a configuration example of a multiplex modulation unit 21 of FIG. 2;

FIG. 4 is a block diagram illustrating a configuration example of an IF modulation unit 22 of FIG. 2;

FIG. 5 is a diagram illustrating an example of a spectrum of a multiplexed FM modulated signal output from an IF modulator 22.

FIG. 6 is a block diagram illustrating a configuration example of an RF frequency conversion unit 23 in FIG. 2;

FIG. 7 is a block diagram illustrating a configuration example of an IF demodulation unit 24 in FIG. 2;

FIG. 8 is a block diagram illustrating a configuration example of a multiplex demodulation unit 25 in FIG. 2;

9 is a diagram showing an example of a radome used in the elevator radio communication system of FIG. 1;

FIG. 10 is a block diagram showing a configuration example of an elevator-side wireless communication device of the elevator wireless communication system according to Embodiment 2 of the present invention.

FIG. 11 is a block diagram showing another configuration example of the elevator-side wireless communication device of the elevator wireless communication system device according to the second embodiment of the present invention.

FIG. 12 is a block diagram illustrating a configuration example of an elevator-side wireless communication device of an elevator wireless communication device according to Embodiment 3 of the present invention.

FIG. 13 is a block diagram illustrating a configuration example of an elevator-side wireless communication device of an elevator wireless communication device according to a fourth embodiment of the present invention.

FIG. 14 is a block diagram showing a configuration example of an elevator-side wireless communication device of an elevator wireless communication device according to a fifth embodiment of the present invention.

FIG. 15 is a block diagram illustrating a configuration example of a high-speed data modulation unit 210 of FIG.

[Explanation of symbols]

1 elevator car, 3 elevator system device, 4, 101, 121, 131, 141, 201
Elevator side radio communication device, 5,11 antenna,
12 elevator control side wireless communication device, 14 elevator control room, 21 multiplex modulation section, 22, IFM1
IFMn, 212 IF modulator, 23 RF frequency converter, 24, IFD1 to IFDn, 213 IF demodulator, 25 multiplex demodulator, 91 radome, 110
1st distributing section, 111 combining section, 112 2nd distributing section, 113 selection switching section, 125 selecting section, 12
6 switching judgment section, 135 addition section, 143 modulation C
H control section, 144 switching pattern generation section, 146
Demodulation CH control unit, 147 switching pattern synchronization unit,
210 High-speed data modulator, 211 High-speed data demodulator.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3F303 EA09 FA01 FA14 FA16 FA17 5C054 AA02 AA05 CA04 CC02 CD03 CE16 CH01 DA01 DA07 EA03 EB05 EG02 EG08

Claims (12)

[Claims] An elevator car and an elevator control room are respectively provided between an elevator-side wireless communication device provided in the elevator car and an elevator control-side wireless communication device connected to an elevator control room for monitoring the operation of the elevator. In the elevator wireless communication system device for wirelessly transmitting each of the video signal, audio signal and various control signals from the various devices, the elevator-side wireless communication device and the elevator control-side wireless communication device A radio communication system for an elevator, wherein the radio communication system performs multiplexing and bidirectional radio transmission. 2. The wireless communication device on the elevator side and the wireless communication device on the elevator control side perform frequency modulation of an audio signal and various control signals at different carrier frequencies when performing wireless transmission of the signals, respectively. The elevator radio communication system according to claim 1, wherein the video signal is added at a constant amplitude ratio, and a predetermined carrier is frequency-modulated and multiplexed with the added signal. 3. The elevator-side wireless communication device and the elevator control-side wireless communication device transmit a low-frequency cutoff frequency of an audio signal and / or various control signals as a DC component. Wireless communication system device for elevators. 4. The elevator-side radio communication device and the elevator-control-side radio communication device add a predetermined ratio of the amplitude values of the carrier waves in the audio signal and the various control signals, and add the amplitude value of the video signal to the amplitude value of the video signal. 4. The elevator radio communication system according to claim 2, wherein the amplitude value of each carrier in the audio signal and various control signals is reduced. 5. The elevator-side wireless communication device and the elevator control-side wireless communication device each include: a multiplex modulation unit that combines and multiplexes the various signals; and a signal multiplexed by the multiplex modulation unit at a predetermined intermediate frequency. An IF modulator for modulating, a carrier frequency converter for converting a signal modulated by the IF modulator to a predetermined carrier frequency, a transmitting / receiving antenna for transmitting the signal converted by the carrier frequency converter, and a transmitting / receiving antenna. An intermediate frequency converter for converting a received signal into a predetermined intermediate frequency, an IF demodulator for demodulating the signal converted by the intermediate frequency converter into a multiplexed signal, and a multiplexed signal demodulated by the IF demodulator And a multiplex demodulator for demodulating the signal into various signals. 5. The elevator radio communication system according to claim 1, further comprising: 6. The elevator-side wireless communication device and the elevator control-side wireless communication device distribute the multiplexed signal to a plurality of channels and simultaneously transmit the multiplexed signals, and select one of the received multiplexed signals of each channel. The radio communication system for elevators according to any one of claims 1 to 4, wherein demodulation of the multiplexed signal is performed by selecting (1). 7. The elevator-side radio communication device and the elevator control-side radio communication device distribute the multiplexed signal to a plurality of channels, transmit the multiplexed signals simultaneously, and add the received multiplexed signals of the respective channels. 5. The demodulation of a multiplexed signal is performed.
The wireless communication system for an elevator according to any one of the above. 8. The elevator-side wireless communication device and the elevator control-side wireless communication device switch a multiplexed signal to a plurality of channels in a predetermined switching pattern synchronized with a video signal, transmit the multiplexed signal, and transmit the received signal. 5. The elevator radio communication system according to claim 1, wherein a multiplexed signal is demodulated by switching channels according to the predetermined switching pattern. 9. The elevator side radio communication device and the elevator control side radio communication device are composed of the multiplexed signal and digital data for performing high-speed digital transmission from various devices provided in an elevator car and an elevator control room, respectively. The wireless communication system for an elevator according to any one of claims 1 to 4, wherein wireless communication is performed bidirectionally by switching between the selected high-speed data signal. 10. The elevator-side radio communication device and the elevator control-side radio communication device binarize the multiplexed signal and perform bidirectional radio transmission as a high-speed data signal for high-speed digital transmission. The elevator radio communication system according to any one of claims 1 to 4, wherein: 11. The elevator-side wireless communication device and the elevator control-side wireless communication device are characterized in that transmission / reception antennas provided to each other are provided at positions facing each other, and that radio waves used for transmission / reception have linear polarization. An elevator wireless communication system according to any one of claims 1 to 10. 12. Each of the transmitting and receiving antennas has a radome for preventing a radio wave from entering from a line-of-sight angle. 12. A material which is formed of a low-loss material and which blocks a radio wave in a direction in which another radio wave enters.
The wireless communication system for an elevator according to claim 1.