JP2007197154A - Elevator remote monitoring system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the intermission of a sound by communicating voice data with priority without adding a communication load to a telecommunication line changing its communication speed separately. <P>SOLUTION: This elevator remote monitoring system 1 is provided with an elevator abnormality monitoring device 14 and a communication controller 17 for monitoring the operation state of an elevator provided with an intercom 8 in a car at a monitoring center 2 in a remote place where a telephone set 16 is installed through the telecommunication line 13 on which an IP is mounted by remote control and connecting the intercom with the telephone set as IP telephone. The elevator abnormality monitoring device or the communication controller obtains a delay time from an interval of the reception of a received voice packet and informs a mate terminal unit of the impossibility of restoration when the delay time is too long to be restored into a state that a voice is not intermittent. The informed mate terminal unit reduces an amount of transmission data of a data packet other than a voice by a predetermined ratio or changes it to a predetermined amount of transmission data. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an elevator remote monitoring system in which a communication line used for remote monitoring of an elevator is used as an Internet telephone line connecting an interphone in a car and a telephone in a monitoring center.

  An elevator abnormality monitoring system includes an elevator control device that controls an elevator, an elevator abnormality monitoring device that performs data communication including direct voice data communication with the communication control device, a communication line, and a communication control device that performs direct data communication with the elevator abnormality monitoring device. , Monitoring device that receives and displays elevator abnormality information, Interphone with microphone and speaker installed in the elevator car, Camera that captures the state of the car, Display that displays the captured image, Installation in the monitoring center Phone. The telephone is connected to the communication control device.

When the elevator control device detects an abnormality in the elevator and the abnormality information is notified to the elevator abnormality monitoring device, the elevator abnormality monitoring device calls the communication control device via the communication line and performs communication control when the line is established. Abnormal information is notified to the monitoring device via the device. At the same time, an image captured by a camera installed in the elevator car is transmitted to the monitoring device via the elevator abnormality monitoring device and the communication control device. Elevator remote control data transmitted from the monitoring device via the communication control device and the elevator abnormality monitoring device is transmitted to the elevator control device. Video data transmitted from the monitoring device via the communication control device and the elevator abnormality monitoring device is transmitted to a display installed in the elevator car.
Voice data communication by VoIP is performed between the intercom and the telephone via the elevator abnormality monitoring device and the communication control device.

  In the communication line, the communication speed varies depending on the line condition, but it is necessary to preferentially perform voice data communication in order to prevent voice interruption. Therefore, when the line speed becomes slow, the data transmission amount other than the voice data is reduced, and when the line speed becomes fast, the data transmission amount other than the voice data is increased. Therefore, in order to measure the line speed, a predetermined amount of communication data is transmitted and received, and an approximate line speed is calculated from the communication time and the amount of data communicated. By performing this calculation periodically, the line speed can be continuously grasped (see, for example, Patent Document 1).

JP 2002-354133 A

However, since the amount of communication data for calculating the line speed is smaller than the amount of communication data during normal communication, it is possible to accurately know the line speed during normal communication. There is a problem that you can not.
On the other hand, if the amount of communication data for calculating the line speed is close to the amount of communication data during normal communication, there is a problem that the amount of data transmitted other than voice data must be reduced. .
In addition, if the period of communication for calculating the line speed is increased, there is a problem that even if the line speed actually changes, the change cannot be grasped immediately, and the voice may be interrupted during that time. .

  An object of the present invention is to provide an elevator remote monitoring system that prevents voice interruption by preferentially communicating voice data without separately adding a communication load to a communication line whose communication speed changes.

  The elevator remote monitoring system according to the present invention remotely monitors the operation state of an elevator in which an interphone is installed in a car at a remote monitoring center where a telephone is installed via a communication line in which an Internet protocol is installed. In the elevator remote monitoring system, the voice data of the interphone is converted into voice packets based on VoIP, the voice packets and data packets other than voice are assembled into frames and sent to the communication line at a constant cycle, and the communication line An elevator abnormality monitoring device that receives a frame from the voice frame, converts the voice packet of the received frame into voice data based on VoIP, and outputs the voice data to the interphone; and converts the voice data of the telephone into voice packets based on VoIP; Voice packet and voice The data packet is assembled into a frame and transmitted to the communication line at a fixed period, and the frame is received from the communication line. The voice packet of the received frame is converted into voice data based on VoIP and output to the telephone. The elevator abnormality monitoring device or the communication control device obtains a delay time from the reception interval of the received voice packet, and when the delay time is large and cannot be repaired so that the voice is not interrupted, Is notified to the communication control device or the elevator abnormality monitoring device, which is the counterpart terminal, and the notified counterpart terminal reduces the transmission data amount of data packets other than voice by a predetermined percentage or the predetermined transmission data amount Change to

  The effect of the elevator remote monitoring system according to the present invention is to receive voice packets transmitted at a constant period, calculate a delay time from the reception interval, determine the delay level by dividing the delay time, When it becomes impossible to repair without interruption, the other terminal is notified of the delay level, and the other terminal reduces the amount of transmitted data other than voice, so the intercom in the elevator car connected as an Internet phone It is possible to maintain good call quality with the monitoring center telephone.

Embodiment 1 FIG.
FIG. 1 is a configuration diagram of an elevator remote monitoring system according to Embodiment 1 of the present invention. FIG. 2 is a functional block diagram of the elevator abnormality monitoring apparatus according to the first embodiment. FIG. 3 is a functional block diagram of the communication control apparatus according to the first embodiment. FIG. 4 is a data structure diagram of the delay level-data reduction rate correspondence table according to the first embodiment.

  The elevator remote monitoring system 1 according to the present invention displays the state of an elevator (not shown) to be monitored on a monitoring device 3 installed in a remote monitoring center 2 or notifies the monitoring staff. As shown in FIG. 1, the elevator remote monitoring system 1 includes an elevator controller 5 that controls an elevator and an elevator that moves up and down in a hoistway (not shown) in a building (not shown) in which the elevator to be monitored is installed. Interphone 8 provided in the car control panel 7 installed in the car 6, camera 10 for imaging the state in the elevator car 6, display 11 installed in the elevator car 6, audio data from the interphone 8, camera 10 Elevator abnormality that packetizes video data from and control data from the elevator control device 5 and sends them to the communication line 13, and forwards packets received from the monitoring center 2 via the communication line 13 to a predetermined destination device. A monitoring device 14 is provided.

The elevator remote monitoring system 1 receives a frame from the elevator abnormality monitoring device 14 via the communication line 13 in the monitoring center 2 and transfers a packet included in the frame to a predetermined destination. The control data from the monitoring device 3 and the voice data from the telephone set 16 are configured as frames and sent to the communication line 13, the telephone set 16 connected to the communication control unit 17, the control data and the video data are received. The monitoring device 3 is displayed.
The interphone 8 and the telephone 16 are Voice of Internet Protocol (hereinafter referred to as “VoIP”) telephones that perform voice communication using the Internet protocol.

  As shown in FIG. 2, the elevator abnormality monitoring device 14 converts an analog voice signal received from the interphone 8 from analog to digital, encodes the digital data, converts the encoded digital data into a voice packet, and conversely receives it. The voice packet is extracted from the frame to be decoded, the voice packet is decoded, converted from digital to analog, and the voice analog signal is output to the intercom 8. The video data from the camera 10 and the control data from the elevator control device 5 are data. Data processing unit 22 for packetizing, delay time calculating unit 23 for obtaining a delay time from the reception interval of the voice packet of the received frame, delay time is divided, and delay level-data stored corresponding to the data reduction rate Reduction rate correspondence table 24, delay time delay record The delay level is notified to the communication control device 17 when the delay level enters and leaves the allowable delay range, and the data amount of the data packet based on the delay level notified from the communication control device 17 And a transmission control unit 26 for controlling transmission of voice packets and data packets.

  As shown in FIG. 3, the communication control device 17 converts the analog voice signal received from the telephone set 16 from analog to digital, encodes the digital data, converts the encoded digital data into a voice packet, and converts it into an elevator abnormality monitoring device 14. On the contrary, from the IP gateway 31 and the monitoring device 3 that extract the voice packet from the frame received from the elevator abnormality monitoring device 14, decode the voice packet, convert it to digital-analog, and output the voice analog signal to the telephone set 16. A data processing unit 32 that converts the control data into data packets, a delay time calculating unit 33 that obtains a delay time from the reception interval of audio packets in a frame received from the elevator abnormality monitoring device 14, and a delay time. Delay level memorized corresponding to rate From the data reduction rate correspondence table 34, the delay level of the delay time is determined, and when the delay level enters and leaves the allowable delay range, the delay level notification unit 35 that notifies the elevator abnormality monitoring device 14 of the delay level, and the elevator abnormality monitoring device 14 A transmission control unit 36 is provided for controlling transmission of voice packets and data packets by controlling the data amount of the data packets based on the notified delay level.

The transmission control units 26 and 36 arrange a voice packet at the head of the frame and transmit it at a constant cycle.
Then, the delay time calculation units 23 and 33 measure the reception interval that elapses from the reception of the first audio packet of the frame to the reception of the first audio packet of the next frame to be transmitted. The difference between the interval and the fixed period is calculated as the delay time.
As shown in FIG. 4, the delay level-data reduction ratio correspondence tables 24 and 34 divide the delay time of the voice packet reception interval into 10 sections at 10 ms intervals, and set the delay levels L0 to L9. At the delay levels L0 to L3, the transmission data amount of the data packet is not reduced. At the delay levels L4, L5, L6, L7, L8, and L9, the transmission data amount of the data packet is decreased by 10%, 20%, 40%, 60%, 80%, and 100%, respectively.
The delay levels L0 and L1 are levels with almost no delay, and the delay levels L2, L3 and L4 are levels that can be restored so that the sound is not interrupted although there is a delay. On the other hand, the delay levels L5 to L9 are levels that cannot be repaired so that the voice is not interrupted, and are levels that require a reduction in the communication load on the communication line 13.
In the following description, the delay levels L0 to L4 are referred to as an allowable delay range. The delay levels L0 and L1 are referred to as no delay range.

The delay level notification unit of the elevator abnormality monitoring device 14 determines the delay level from the delay time calculated by the delay time calculation unit of the elevator abnormality monitoring device with reference to the delay level-data reduction rate correspondence table, and the delay level is allowed. When it is out of the delay range, the delay level is notified to the communication control apparatus which is the counterpart terminal. The delay level notification unit notifies the communication control device of the delay level when the delay level falls within the allowable delay range.
On the other hand, the delay level notification unit of the communication control device determines the delay level from the delay time calculated by the delay time calculation unit of the communication control device with reference to the delay level-data reduction rate correspondence table, and the delay level is an allowable delay. When it goes out of range, the delay level is notified to the elevator abnormal communication control device which is the counterpart terminal. Further, the delay level notification unit notifies the elevator abnormality monitoring device of the delay level when the delay level falls within the allowable delay range.

Next, a procedure for notifying the counterpart terminal of the delay level executed in the elevator abnormality monitoring device and the communication control device will be described with reference to FIG. FIG. 5 is a flowchart showing a procedure for notifying the counterpart terminal of the delay level.
In step S101, a delay time is calculated.
In step S102, it is determined whether or not the delay level has changed. If the delay level has changed, the process proceeds to step S103. If the delay level has not changed, the process proceeds to step S105.
In step S103, it is determined whether or not the changed delay level is within the allowable delay range. If it is within the allowable delay range, the process returns to step S101, and if it is outside the allowable delay range, the process proceeds to step S104.
In step S104, the changed delay level is notified to the partner terminal, and the process returns to step S101.
In step S105, it is determined whether or not a predetermined time, for example, 10 seconds has elapsed since the latest delay level change. If not, the process returns to step S101, and if it has elapsed, the process proceeds to step S106.
In step S106, the current delay level is notified to the partner terminal, and the process returns to step 101.

Next, a procedure for increasing / decreasing the amount of data transmission other than voice when a delay level notification is received from the counterpart terminal will be described with reference to FIG. FIG. 6 is a flowchart showing a procedure for increasing / decreasing the amount of data transmission other than voice when a notification of the delay level is received from the counterpart terminal.
In step S201, it is determined whether or not a delay level notification has been received from the counterpart terminal. If received, the process proceeds to step S202. If not received, step S201 is repeated.
In step S202, it is determined whether or not the received delay level is outside the allowable delay range. If the delay level is outside the allowable delay range, the process proceeds to step S203. If the delay level is within the allowable delay range, the process proceeds to step S204.
In step S203, the transmission data amount of the data packet is reduced by the data reduction rate corresponding to the received delay level, and the process returns to step S201.
In step S204, it is determined whether or not the received delay level is within the no-delay range. If it is outside the no-delay range, the process proceeds to step S205, and if it is within the no-delay range, the process proceeds to step S206.
In step S205, the transmission data amount of the data packet is reduced by the data reduction rate corresponding to the received delay level, and the process returns to step S201.
In step S206, it is determined whether or not the delay level is within the no-delay range for a predetermined time or more. When the delay level is within the no-delay range for the predetermined time or more, the process proceeds to step S207. When it is less than the time, the process returns to step S201.
In step S207, the amount of transmission data other than voice is increased by a predetermined ratio, and the process returns to step S201.

  Such an elevator remote monitoring system receives voice packets transmitted at a fixed period, calculates a delay time from the reception interval, determines the delay level by dividing the delay time, and prevents the voice from being interrupted at the delay level. When it becomes impossible to restore to the other terminal, the other terminal is notified of the delay level, and the other terminal reduces the amount of transmitted data other than voice, so the intercom in the elevator car connected as an Internet telephone and the monitoring center The call quality with the telephone can be kept good.

  Further, when a state with little delay continues for a predetermined time, the amount of transmission data other than voice is increased, so that the communication band of the communication line can be maximized.

Embodiment 2. FIG.
The elevator remote monitoring system according to the second embodiment of the present invention is a procedure for increasing / decreasing the amount of transmission data other than voice when receiving the notification of the delay level from the elevator remote monitoring system 1 according to the first embodiment and the counterpart terminal. However, the other parts are the same, and the same parts are denoted by the same reference numerals and the description thereof is omitted.
In the second embodiment, when the notified delay level is outside the allowable delay range, the amount of transmission data other than voice is once reduced by 80% or 100%, and the communication load of the communication line is extremely reduced to reduce the voice. The communication environment is temporarily recovered. Then, the amount of transmission data other than the voice is gradually increased, and the delay time is maintained in a range where the voice can be repaired so as not to be interrupted.

In the second embodiment, a procedure for increasing / decreasing the amount of data transmission other than voice when a delay level notification is received from the counterpart terminal will be described with reference to FIG. FIG. 7 is a flowchart showing a procedure for increasing / decreasing the amount of data transmission other than voice when a delay level notification is received from the counterpart terminal in the second embodiment.
In step S301, it is determined whether or not a delay level notification has been received from the counterpart terminal. If received, the process proceeds to step S302. If not received, step S301 is repeated.
In step S302, it is determined whether or not the received delay level is outside the allowable delay range. If the delay level is outside the allowable delay range, the process proceeds to step S303, and if the delay level is within the allowable delay range, the process proceeds to step S304.
In step S303, the transmission of the data packet is stopped and the process returns to step S301.
In step S304, it is determined whether or not the received delay level is within the no-delay range. If it is outside the no-delay range, the process returns to step S301, and if it is within the no-delay range, the process proceeds to step S305.
In step S305, it is determined whether or not the delay level is within the no-delay range for a predetermined time or more. When the delay level is within the no-delay range for the predetermined time or more, the process proceeds to step S306, If it is less than the time, the process returns to step S301.
In step S306, the amount of transmission data other than voice is increased by a predetermined rate, and the process returns to step S301.

In such an elevator remote monitoring system, when the delay time becomes so large that it cannot be repaired so that the voice is not interrupted, the transmission data amount other than the voice is temporarily reduced to 80% once or the transmission is stopped. Therefore, the communication load on the communication line is reduced, and the voice quality can be quickly recovered.
Although the transmission of the data packet is stopped when the delay level is outside the allowable delay range, the voice quality can be quickly recovered even if the transmission data amount is extremely reduced to, for example, 80%.

Embodiment 3 FIG.
The elevator remote monitoring system according to the third embodiment of the present invention has a delay level-transmission data amount correspondence table instead of the delay level-data reduction ratio correspondence table of the elevator remote monitoring system 1 according to the first embodiment. Since the other parts are the same, the same parts are denoted by the same reference numerals, and the description thereof is omitted.

As shown in FIG. 8, the delay level-transmission data amount correspondence table divides the delay time of the voice packet reception interval into 10 sections at 10 ms intervals, and sets the delay levels as L0 to L9. The number of packets as the amount of transmission data other than voice is determined for each delay level. At the delay levels L0 to L3, the maximum number of packets is 100. At the delay levels L4, L5, L6, L7, L8, and L9, the number of packets is set to 90, 80, 60, 40, 20, and 0, respectively.
Note that the delay levels L0 and L1 are levels with almost no delay, and the delay levels L2, L3 and L4 are levels that can be restored so that the sound is not interrupted although there is a delay. On the other hand, at the delay levels L5 to L9, it is impossible to restore the voice without interruption, and it is necessary to reduce the communication load of the communication line.
In the following description, the delay levels L0 to L4 are referred to as an allowable delay range. The delay levels L0 and L1 are referred to as no delay range.

  Thus, even if the transmission data amount is determined in advance for the delay level and the transmission data amount other than the voice is adjusted based on the transmission data amount, the same effect as in the first embodiment can be obtained.

It is a block diagram of the elevator remote monitoring system concerning Embodiment 1 of this invention. It is a functional block diagram of the elevator abnormality monitoring device according to the first embodiment. It is a functional block diagram of the communication control apparatus concerning this Embodiment 1. FIG. 6 is a data structure diagram of a delay level-data reduction ratio correspondence table according to the first embodiment. It is a flowchart which shows the procedure which notifies a delay level to an other party terminal. 7 is a flowchart showing a procedure for increasing or decreasing the amount of data transmission other than voice when a delay level notification is received from the counterpart terminal in the first embodiment. 10 is a flowchart illustrating a procedure for increasing / decreasing the amount of data transmission other than voice when a delay level notification is received from the counterpart terminal in the second embodiment. FIG. 10 is a data structure diagram of a delay level-transmission data amount correspondence table according to the third embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Elevator remote monitoring system, 2 Monitoring center, 3 Monitoring apparatus, 5 Elevator control apparatus, 6 Elevator basket, 7 Inside control board, 8 Interphone, 10 Camera, 11 Display, 13 Communication line, 14 Elevator abnormality monitoring apparatus, 16 Telephone , 17 Communication control device, 21, 31 IP gateway, 22, 32 Data processing unit, 23, 33 Delay time calculation unit, 24, 34 Delay level-data reduction rate correspondence table, 25, 35 Delay level notification unit, 26, 36 Transmission control unit.

Claims (3)

In an elevator remote monitoring system for remotely monitoring the operation state of an elevator in which an interphone is installed in a car at a remote monitoring center where a telephone is installed via a communication line in which an Internet protocol is implemented,
The voice data of the intercom is converted into voice packets based on VoIP, the voice packets and non-voice data packets are assembled as frames and sent to the communication line at a fixed period, and the frames are received from the communication line. An elevator abnormality monitoring device that converts voice packets of received frames into voice data based on VoIP and outputs the voice data to the interphone;
The voice data of the telephone is converted into voice packets based on VoIP, the voice packets and non-voice data packets are assembled into frames and sent to the communication line at a fixed period, and the frames are received from the communication line. A communication control device that converts voice packets of received frames into voice data based on VoIP and outputs the voice data to the telephone;
Is provided,
The elevator abnormality monitoring device and the communication control device obtain a delay time from the reception interval of each received voice packet, and when the delay time is large and cannot be repaired so that the voice is not interrupted, that is the counterpart terminal Notify the communication control device or the elevator abnormality monitoring device,
The notified remote terminal reduces the transmission data amount of data packets other than voice by a predetermined rate or changes to a predetermined transmission data amount. The elevator abnormality monitoring device and the communication control device notify the communication control device or the elevator abnormality monitoring device, which is the counterpart terminal, when the delay time is small and the sound is not interrupted without repair. ,
The partner terminal that has been notified that the delay time is large and cannot be repaired so that the voice is not interrupted reduces the transmission data amount of data packets other than voice by 80% or more,
2. The elevator remote monitoring according to claim 1, wherein the partner terminal notified that the voice is not interrupted even if the delay time is small and is not repaired gradually increases the transmission data amount of data packets other than the voice. system. When the elevator abnormality monitoring device and the communication control device each have a small delay time and the sound is not interrupted without repair, the elevator abnormality monitoring device notifies the communication control device or the elevator abnormality monitoring device, which is the counterpart terminal,
When the delay time is small over a predetermined time, the partner terminal notified that the delay time is small and the voice will not be interrupted even if it is not repaired, gradually increases the transmission data amount of data packets other than the voice. The elevator remote monitoring system according to claim 1.

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