JP5325564B2 - Man conveyor monitoring device and man conveyor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To perform stable communication by securing sufficient S/N, in the power line carrier communication of using a power line of AC100V supplied to an escalator control board. <P>SOLUTION: This man conveyor monitoring device comprises the escalator control board 14 for controlling the operation of an escalator 10, an inverter 32 arranged at the escalator control board and driving a motor 34 of the escalator with supplied AC200V as a power source, and a communication device 36 connected to an AC100V power line 20 supplied as the power source in the escalator control board and communicating with a managing center 38 for remotely managing the escalator with the power line as a communication passage. A noise filter 72 is arranged for restraining noise generated from an inverter at the power source upstream side more than a position connected with an inverter of an AC200V power line in the escalator control board, and a low-pass filter 74 is arranged at the power source downstream side more than a position connected with the communication device of the AC100V power line at the escalator control board. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a man conveyor monitoring device that monitors man conveyors such as escalators and moving walkways, and a man conveyor including the man conveyor monitoring device.

  In recent years, man conveyors such as escalators and moving walkways have been monitored from a remote building management room or a monitoring center in order to promptly respond to problems.

  For example, as described in Patent Document 1, the monitoring image information of the monitoring cameras installed at the upper and lower parts of the escalator landing is taken into the communication device and transmitted to the management room using a telephone line or a broadband line, There has been proposed a system that determines whether or not there are passengers or obstacles by referring to a monitoring image before starting a recovery operation.

  Further, in Patent Document 2, a control signal indicating an escalator operation state and monitoring image information from a monitoring camera are taken into a PHS (Personal Handy-Phone System) terminal device and transmitted to a maintenance monitoring center via a PHS network. Thus, a system for remotely monitoring an escalator from a maintenance monitoring center has been proposed.

JP 2008-13358 A JP 2007-137556 A

  However, in the prior art described in Patent Document 1, it is necessary to connect a telephone line or the like to the communication device. However, a communication cable such as a telephone line is not laid to an escalator control panel provided with the communication device, for example. Therefore, a new communication cable needs to be laid between the escalator control panel and the telephone line.

  Also in the prior art described in Patent Document 2, when a signal from the escalator control panel is captured by one PHS terminal device, data transfer between the elevator control panel and one PHS terminal device is possible. Therefore, it is necessary to newly install a communication cable.

  That is, in any prior art, a power line for supplying power is connected to the escalator control panel, but power line carrier communication that communicates using this power line as a communication path is not considered. If monitoring information from the escalator control panel can be transmitted using this power line as it is, no new cables or cable laying work is required, and a monitoring communication system can be constructed easily and in a short time. preferable.

  By the way, in recent man conveyors, for example, AC 100V is supplied as a single-phase AC to the man conveyor control panel for lighting the man conveyor, and AC 200V is used as a three-phase AC for a motor driving the man conveyor. Have been supplied. When considering power line carrier communication using an AC 100V power line in such a man conveyor, it is necessary to consider ensuring a sufficient S / N and performing stable communication.

  That is, recent man conveyors employ inverters for control panel downsizing, performance improvement, energy saving operation, etc., and the motors of man conveyors are driven by three-phase AC200V through the inverters. In this case, the switching noise of the switching element of the inverter is superimposed on the three-phase AC200V power line, and this high-frequency switching noise is induced to the adjacent AC100V power line in the man conveyor control panel, so that the S / N of the power line carrier communication May get worse.

  Therefore, an object of the present invention is to secure a sufficient S / N and perform stable communication in power line carrier communication using a single-phase AC power line supplied to a man conveyor control panel.

In order to solve the above-mentioned problems, a man conveyor monitoring device according to the present invention includes a man conveyor control panel for controlling the operation of the man conveyor, and a man conveyor which is provided in the man conveyor control panel and uses the supplied three-phase alternating current as a power source. A communication device (power line carrier) that is connected to an inverter that drives the motor and a single-phase AC power line that is supplied as power to the man conveyor control panel and communicates with a management center that remotely manages the man conveyor using this power line as a communication path Communication device), and a three-phase AC power line and a single-phase AC power line intersect or are adjacent to each other in the man conveyor control panel. A noise filter for suppressing noise generated from the inverter is provided upstream of the position where the inverter of the power line is connected, and the Conveyor control panel single-phase AC power source downstream of the communication devices are connected position of the power line of, and a low-pass filter is characterized by comprising also provided to the power supply upstream of the power line proximity portions.

  That is, the noise filter provided on the power line of the three-phase AC (for example, three-phase AC 200V) suppresses the noise (high-frequency switching noise) generated from the inverter and superimposed on the three-phase AC power line from propagating to the upstream side of the power supply. can do. In addition, the low-pass filter provided on the power line of the single-phase AC (for example, single-phase AC 100V) causes the noise caused by the inverter induced in the single-phase AC power line to be upstream of the power source, in other words, between the communication device and the management center. Propagation to the communication path can be suppressed. Therefore, in power line communication using a single-phase AC power line supplied to the man conveyor control panel, noise caused by the inverter can be suppressed, and as a result, sufficient S / N can be secured and stable communication can be performed. it can.

  Further, in the man conveyor monitoring device of the present invention, the communication device is provided at the power receiving end of the single phase AC in the man conveyor control panel, and the low pass filter is provided downstream of the position where the communication device of the single phase AC power line is connected. It is preferable to provide in the vicinity. According to this, it is possible to suppress the deterioration of the S / N of the power line carrier communication due to the noise caused by the inverter being induced upstream of the low-pass filter of the single-phase AC power line in the man conveyor control panel.

  The low-pass filter is a low-pass filter formed by providing an inductance element in series between the connection position of the capacitor connected to the single-phase AC power line and the position where the communication device of the single-phase AC power line is connected; can do. That is, the impedance of the single-phase AC power line is lowered due to the influence of the equipment connected to the single-phase AC power line in the man conveyor control panel, or the influence of the capacitor forming the low-pass filter, etc. N may get worse. In this regard, by providing an inductance element in series between the position where the capacitor forming the low-pass filter in the single-phase AC power line is connected and the position where the communication device is connected, the single-phase AC power line viewed from the communication device side The impedance of the (communication path) is increased and attenuation of the communication signal can be suppressed.

  In addition, a noise filter is provided in the vicinity of the upstream side of the power supply from the position where the inverter of the three-phase AC power line in the man conveyor control panel is connected to suppress the noise caused by the inverter from diffusing in the man conveyor control panel. can do. In addition, a noise filter is provided at the receiving end of the three-phase AC in the man conveyor control panel to suppress the noise caused by the inverter from propagating through the three-phase AC power line to the outside of the man conveyor control panel. it can.

  ADVANTAGE OF THE INVENTION According to this invention, in power line carrier communication using the power line of the single phase alternating current power supply supplied to a man conveyor control board, sufficient S / N can be ensured and stable communication can be performed.

  Hereinafter, an embodiment of a man conveyor monitoring device to which the present invention is applied will be described. In the following description, the same functional parts are denoted by the same reference numerals, and redundant description is omitted. In the following description, an escalator is illustrated as an example of a man conveyor, but the present invention can also be applied to man conveyors such as moving walkways and elevators in addition to escalators.

  FIG. 1 is a diagram illustrating an overall configuration of an escalator monitoring apparatus according to the present embodiment and an escalator including the escalator monitoring apparatus. As shown in FIG. 1, an upper machine room 12 is formed in the upper part of the truss 10 a of the escalator 10, and an escalator control panel 14 (also referred to as a man conveyor control panel) is installed in the upper machine room 12. ing. A lower machine room 16 is formed in the lower part of the truss 10a, and an escalator control panel 18 is installed in the lower machine room 16.

  The escalator control panel 14 is connected to an AC 100V power line 20 as a single-phase AC and a three-phase AC 200V power line 22 as a three-phase AC, and is supplied with an AC 100V power source and a three-phase AC 200V power source, respectively. AC 100V power is supplied from the power system through a 100V breaker board 24 and a 100V breaker 26 provided on the 100V breaker board 24. The AC 200V power is supplied from the power system through the 200V breaker board 28 and the 200V breaker 30 provided on the 200V breaker board 28. In FIG. 1, the 100V breaker 26 and the 200V breaker 30 are installed on separate breaker boards, but may be installed on the same breaker board.

  The AC100V power supply is supplied to various parts such as a microcomputer for controlling the operation of the escalator in the escalator control panel 14, the balustrade lighting of the escalator, and the lower machine room 16 via the AC100V power line 20a in the truss 10a. The escalator control panel 18 is also supplied.

  On the other hand, the AC 200V power source is supplied to an inverter 32 provided in the escalator control panel 14, and drives an escalator driving motor 34 provided in the truss 10a via the inverter 32 and the AC 200V power line 22a. In addition to the escalator control panels 14 and 18 and the motor 34, various devices necessary for the escalator such as a moving handrail drive device (not shown) are incorporated in the truss 10a. The escalator control panel 18 is provided with an emergency stop switch detector and the like.

  Further, a communication device 36 (power line carrier communication device) is connected to the AC 100V power line 20 in the escalator control panel 14. The escalator monitoring device of this embodiment is configured to communicate with a management device provided in a management center 38 that remotely manages the escalator 10 using the AC 100V power line 20 as a communication path. That is, between the power line carrier communication device 36 on the escalator 10 side and the power line carrier communication device 42 (power line carrier communication device) on the management center 38 side connected to the management center 38 via the dedicated communication line 40, Communication is performed via the AC 100 V power line 20.

  FIG. 2 is a diagram illustrating a schematic configuration of the communication device 36. As shown in FIG. 2, the communication device 36 includes an input data editing circuit 44, a modulation circuit 46 that receives an output signal from the input data editing circuit 44, and a transmission amplifier that receives an output signal from the modulation circuit 46. 48, a coupler 50 to which an output signal from the transmission amplifier 48 is input, a reception amplifier 52 to which an output signal from the coupler 50 is input, and a demodulation circuit 54 to which an output signal from the reception amplifier 52 is input It is configured with.

  In the input data editing circuit 44, as monitoring information of the escalator 10, for example, emergency stop switch state signal 56, alarm information 58 such as a motor power loss signal, maintenance information 60 (device state signal, Vibration data and the like, and monitor image information 62 for monitoring the use status of the escalator with a camera are captured.

  The captured monitoring information is input to the modulation circuit 46, and the modulation circuit 46 modulates the input data according to a predetermined modulation method (BPSK, QPSK, QAM, spread spectrum, etc.) and transmits it in order to communicate using the power line as a communication path. A communication signal is output to the amplifier 48. Data input to the transmission amplifier 48 is amplified by the transmission amplifier 48 and superimposed on the AC 100V power line 20 via the coupler 50.

  On the other hand, the communication signal sent from the communication device 42 via the AC 100V power line 20 is input to the reception amplifier 52 via the coupler 50, amplified, demodulated by the demodulation circuit 54, and input to the input data editing circuit 44. Entered. The input data editing circuit 44 responds to a communication request signal from the communication device 42 or independently edits input data such as communication of notification information.

  Thereby, the monitoring information of the escalator 10 input to the communication device 36 is communicated to the communication device 42 using the AC 100V power line 20 as a communication path, and is transmitted to the management device of the management center 38 via the dedicated communication line 40. As a result, the escalator 10 can be remotely monitored by the management device of the management center 38. Communication signals from a plurality of escalators are sent to the management center 38, and a plurality of escalators can be remotely monitored simultaneously.

  By the way, the monitoring information of the escalator 10 is communicated even when the escalator 10 is operating. Here, the inverter 32 is connected to the AC 200 V power line 22, but electromagnetic noise is generated by the on / off operation of switching elements (for example, semiconductor switching elements such as IGBTs, bipolar transistors, FETs, and thyristors) constituting the inverter 32.

  This electromagnetic noise is high-frequency noise that is determined by the inductance or stray capacitance due to the wiring in the circuit and the switching speed of the switching element when the switching element is turned on or off. Although this noise is superimposed on the AC 200 V power line 22, it has been experimentally found that this high frequency noise is induced in the adjacent AC 100 V power line 20.

  In particular, the guidance is dominant in the escalator control panel 14. That is, FIG. 3 is a diagram showing an example of a schematic internal configuration of the escalator control panel 14, but as shown in this figure, the escalator control panel 14 is provided with various components including the inverter 32. AC100V power lines 20 and 20a (double lines) and AC200V power lines 22 and 22a (thick lines) are laid together. In addition, since there is a limit to the size of the escalator control panel 14 for reasons such as a demand for downsizing of the escalator control panel 14, there is a limit to separating the mutual distance between the AC100V power lines 20 and 20a and the AC200V power lines 22 and 22a. is there. Therefore, the induction of noise caused by the inverter 32 is dominant in the escalator control panel 14.

  As shown in FIG. 3, in the escalator control panel 14, a microcomputer 64 that controls the inverter 32, an AC / DC converter 66 that supplies DC power from the AC 100V to the microcomputer 64, and an AC 100V balustrade illumination A circuit breaker 68 (FFB) and a varistor 70 (ZNR) provided on the output side to an outlet or the like are provided.

  4 and 5 are diagrams showing the results of measuring the noise characteristics superimposed on the AC 100 V power line 20 when the inverter 32 is stopped and operating in order to evaluate the characteristics of the power line carrier communication. As shown in FIG. 4, the noise of the AC 100V power line 20 (live line state) when AC 200V power is not supplied (when the 200V breaker 30 is off) has a noise level of about 10 dBμV at a frequency of about 2 MHz or more. It turns out that it is low.

  On the other hand, as shown in FIG. 5, the noise of the AC100V power line 20 (live line state) during operation of the inverter 32 includes a plurality of frequency bands in which the noise level is about 60 dBμV in a communication band of 2 to 30 MHz, for example. It was found that the noise level was high in the band. As described above, in the escalator control panel 14, the AC 100V power lines 20 and 20a and the AC 200V power lines 22 and 22a are laid relatively close to each other. It was found that noise from the inverter was induced in the AC 100V power lines 20 and 20a.

  As a result of evaluating such experimental results, it was found that the noise induced in the AC 100V power lines 20 and 20a ranged from several hundred kHz to several tens of MHz and the noise level was relatively high. The communication of monitoring information including images requires a communication speed of about several MBPS or higher, and the frequency band of communication signals also requires a frequency band of several MHz or higher. For this reason, the frequency band of the communication signal is almost the same as the noise band, and there are many frequency bands with high noise levels. Therefore, power line carrier communication using an AC100V power line cannot secure sufficient S / N, and stable communication. May not be possible. In particular, image communication that requires a high communication speed may cause a problem that a sufficient communication speed cannot be obtained.

  Therefore, in the present embodiment, a noise filter 72 that suppresses noise generated from the inverter upstream of the position where the inverter of the AC 200V power line 22 in the escalator control panel 14 is connected is provided. Further, a low pass filter 74 is provided on the downstream side of the power source from the position where the communication device 36 of the AC 100V power line 20 is connected in the escalator control panel 14.

  6 and 7 are diagrams illustrating a configuration example of the noise filter 72. FIG. 8 is a diagram illustrating a configuration example of the low-pass filter 74. As shown in FIGS. 6 and 7, the noise filter can be composed of coils L1 and L2 and a capacitor C, which are inductance elements, or a coil L1 and a capacitor C. As shown in FIG. 8, the low-pass filter 74 can be composed of a coil L1 and a capacitor C, which are inductance elements.

  According to the present embodiment, the noise (high frequency switching noise) generated from the inverter 32 and superimposed on the AC 200V power line 22a is propagated to the upstream side of the power source, that is, the AC 200V power line 22 side, by the noise filter 72 provided on the AC 200V power line. Can be suppressed. In addition, the low-pass filter 74 provided on the AC 100V power line causes the inverter-induced noise induced in the AC 100V power line 20a to be on the upstream side of the power source, in other words, the AC 100V power line 20 corresponding to the communication path between the communication device and the management center. Propagation can be suppressed. Therefore, in power line carrier communication using the AC 100V power line supplied to the escalator control panel 14, noise caused by the inverter can be suppressed, and as a result, sufficient S / N can be secured and stable communication can be performed.

  In particular, as shown in FIG. 3, the communication device 36 is provided at the AC100V power receiving end in the escalator control panel 14, and the low-pass filter 74 is located downstream of the power supply from the position where the communication device 36 of the AC100V power line 20 is connected. It is preferable to provide in the vicinity. According to this, in the escalator control panel 14, it is possible to suppress the noise caused by the inverter 32 from being induced to the power supply upstream side from the low-pass filter 74 of the AC 100V power line 20 to deteriorate the S / N of the power line carrier communication. .

  Further, a noise filter 72 is provided in the vicinity of the power supply upstream side of the escalator control panel 14 where the inverter 32 of the AC200V power line is connected to suppress the noise caused by the inverter 32 from diffusing in the escalator control panel 14. You can also Further, the noise filter 72 is provided at the AC200V receiving end of the escalator control panel 14 so as to suppress the noise caused by the inverter 32 from propagating to the AC200V power line 22 and propagating outside the escalator control panel 14. You can also.

  By the way, in the power line carrier communication using the AC 100V power line, there may be a factor that deteriorates the S / N in addition to the noise caused by the inverter. That is, the attenuation of the communication signal in the AC 100V power line 20 becomes a problem. The impedance of the AC 100V power line 20 is such that the equipment connected to the AC 100V power line in the escalator control panel 14, the varistor 70 provided in the escalator control panel 14, or the capacitor C constituting the low-pass filter 74 as shown in FIG. It turns out that it becomes low by influence.

  FIG. 9 is a diagram illustrating a measurement result of the attenuation characteristic of the communication signal of the AC 100V power line 20. As shown in FIG. 9, it can be seen that the signal level is attenuated as the frequency is increased, and that the signal level is rapidly attenuated at 10 MHz or higher.

  That is, in the power line carrier communication using the AC 100V power line, the S / N is reduced due to the induction noise caused by the inverter 32 and the attenuation of the communication signal caused by the impedance reduction of the AC 100V power line 20. For this reason, in addition to the suppression of the induction noise caused by the inverter 32 described above, improving the impedance of the AC 100V power line 20 is effective for improving the S / N in the power line carrier communication using the AC 100V power line.

  Therefore, the low-pass filter 74 is more preferably formed by providing an inductance element in series between the connection position of the capacitor C connected to the AC 100V power line 20 and the position where the communication device 36 of the AC 100V power line 20 is connected. .

  10 to 13 are diagrams illustrating a configuration example of the low-pass filter 74. As shown in FIGS. 10 to 13, the low-pass filter 74 is connected in series with the AC 100 V power line 20 in order to increase the impedance of the low-pass filter 74 viewed from the communication device 36 side with respect to, for example, a signal of 2 MHz to 30 MHz. A coil L2 or a ferrite core L2 is provided as an inductance element.

  According to this, since the impedance of the low-pass filter 74 viewed from the communication device 36 side becomes high, the communication signal having a frequency used for communication is absorbed and attenuated by the capacitor C to suppress deterioration of the S / N. be able to.

  Since AC200V power line 22 does not carry out power line carrier communication, there is no problem even if AC 200V power line 22 is not provided with coil L2 as an inductance element and capacitor C is attached to AC200V power line 22 as shown in FIG.

  As described above, according to the present embodiment, when the monitoring information of the escalator 10 is taken into the communication device 36 and the power line carrier communication is performed using the AC 100V power line 20, the low-pass filter 74 is provided so that the AC 100V from the inverter 32 and the AC 200V power line. It can suppress that the noise induced | guided | derived to a power line is propagated to AC100V power line 20 which is a communication path. In addition, by providing the noise filter 72, it is possible to suppress the noise caused by the inverter 32 from propagating to the AC 200V power line 22. Therefore, stable power line carrier communication is possible.

  In particular, the impedance of the low-pass filter 74 with respect to the frequency band of the communication signal can be increased by installing the coil L2 or the ferrite core L2 as an inductance element on the AC 100V supply side to configure the low-pass filter 74. Therefore, it is possible to suppress the attenuation of the communication signal due to the impedance being reduced in the AC 100 V power line 20 due to the device connected to the AC 100 V power line 20. Furthermore, signal absorption of the communication signal itself by the low-pass filter 74 can be suppressed.

  In other words, according to the present embodiment, the propagation of noise is suppressed by the noise filter 72 and the low-pass filter 74, and the signal of the communication signal is configured by configuring the low-pass filter 74 including the coil L2 or the ferrite core L2 that is an inductance element. By suppressing the attenuation, the S / N level of the communication signal can be increased and stable high-speed communication can be realized.

It is a figure which shows the whole escalator monitoring apparatus of this embodiment, and the escalator provided with this escalator monitoring apparatus. It is a figure which shows schematic structure of a communication apparatus. It is a figure which shows an example of the outline of an internal structure of an escalator control panel. It is a figure which shows the result of having measured the noise characteristic superimposed on an AC100V power line at the time of a stop of an inverter. It is a figure which shows the result of having measured the noise characteristic superimposed on AC100V power line at the time of operation | movement of an inverter. It is a figure which shows the structural example of a noise filter. It is a figure which shows the structural example of a noise filter. It is a figure which shows the structural example of a low-pass filter. It is a figure which shows the measurement result of the attenuation characteristic of the communication signal of an AC100V power line. It is a figure which shows the structural example of a low-pass filter. It is a figure which shows the structural example of a low-pass filter. It is a figure which shows the structural example of a low-pass filter. It is a figure which shows the structural example of a low-pass filter.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Escalator 14 Escalator control board 18 Escalator control board 20, 20a AC100V power line 22, 22a AC200V power line 24 100V breaker board 26 100V breaker 28 200V breaker board 30 200V breaker 32 Inverter 34 Motor 36 Communication apparatus 38 Management center 72 Noise filter 74 Low pass filter L1 Coil L2 Coil, Ferrite core C Capacitor

Claims (6)

A man conveyor control panel for controlling operation of the man conveyor, an inverter provided in the man conveyor control panel and driving the motor of the man conveyor using the supplied three-phase alternating current as a power source, and the man conveyor control panel A communication device connected to a single-phase AC power line supplied as a power source and communicating with a management center that remotely manages the man conveyor using the power line as a communication path;
In the man conveyor control panel, the three-phase AC power line and the single-phase AC power line cross or are adjacent to each other, and have a power line proximity portion.
A noise filter that suppresses noise generated from the inverter upstream of the position where the inverter of the three-phase AC power line in the man conveyor control panel is connected is provided,
A low-pass filter is provided on the downstream side of the power supply from the position where the communication device of the single-phase AC power line in the man conveyor control panel is connected , and on the upstream side of the power line adjacent portion. Man conveyor monitoring device.   The communication device is provided at the single-phase AC power receiving end in the man conveyor control panel, and the low-pass filter is located near the downstream side of the power supply from the position where the communication device is connected to the single-phase AC power line. The man conveyor monitoring device according to claim 1 provided.   The low-pass filter is formed by providing an inductance element in series between a connection position of a capacitor connected to the single-phase AC power line and a position where the communication device of the single-phase AC power line is connected. 3. The man conveyor monitoring device according to claim 2, which is a low-pass filter.   4. The man conveyor monitoring device according to claim 3, wherein the noise filter is provided in the vicinity of a power supply upstream side of a position where the inverter of the three-phase AC power line in the man conveyor control panel is connected.   4. The man conveyor monitoring apparatus according to claim 3, wherein the noise filter is provided at a power receiving end of the three-phase AC in the man conveyor control panel.   A man conveyor comprising the man conveyor monitoring device according to any one of claims 1 to 5.

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