JP3412717B2 - Remote monitoring system - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to remote monitoring in which signals are exchanged between a remote maintenance terminal of an elevator and a remote monitoring center using a telephone line to monitor various states of the elevator at the remote monitoring center. Regarding the system.

[0002]

2. Description of the Related Art Conventionally, in this type of remote monitoring system, a telephone line has been used as a dedicated transmission line for transmitting an FSK (frequency modulation system) signal. Therefore, when monitoring the traveling state of the elevator at the remote monitoring center, the data of the traveling state of the elevator is converted into the FSK signal in a time zone different from the time zone in which the contact information of the elevator for knowing the failure content of the elevator is transmitted. It had to be modulated and transmitted to the remote monitoring center. That is, during the time period when the data representing the contact information of the elevator is transmitted by the FSK signal, the data representing the traveling state of the elevator cannot be transmitted by the FSK signal, so that the data representing the traveling state of the elevator is temporarily stored. Will be required.

Therefore, conventionally, the traveling state data for each traveling distance of a plurality of stages predetermined for each building or other building is once stored in the storage element of the elevator, and the stored data is stored in the remote maintenance terminal device. After collecting the data, the data indicating the traveling state of the elevator is transmitted as the FSK signal in the time zone in which the contact information of the elevator is not transmitted as the FSK signal.

[0004]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
In the conventional case, since the data indicating the traveling state of the elevator received by the remote monitoring center is the data of the movement of the elevator in the past, it is impossible to monitor the traveling state in real time at the remote monitoring center. Therefore, when there is a sign of abnormality in the driving condition data during remote operation and it is necessary to stop the elevator urgently,
Until the data transmission of the traveling state data of the elevator is completed, there is a problem that the elevator control signal cannot be sent from the remote monitoring center to the remote maintenance terminal device in order to stop the elevator.

The present invention has been made by paying attention to the above-mentioned circumstances, and an object of the present invention is to provide, when a sign of abnormality appears in a running state of an elevator during remote operation,
It is to provide a remote monitoring system capable of emergency stop of an elevator in real time.

[0006]

In order to achieve the above object, the present invention according to claim 1 uses a telephone line to exchange a signal between a remote maintenance terminal device of an elevator and a remote monitoring center. In a remote monitoring system for monitoring various states of an elevator at a remote monitoring center, the remote maintenance terminal device has a first signal group by a frequency modulation method corresponding to contact information of the elevator for knowing details of failure of the elevator. And a second signal group for generating a second signal group in a frequency band different from that of the first signal group by the push button signal conversion method that directly detects the traveling state of the elevator. Group forming means and first communication means for multiplexing the first and second signal groups and outputting to the telephone line are provided, and the remote monitoring center is provided via the telephone line. Second communication means for inputting the multiplexed first and second signal groups, and signal group separation means for separating the input multiplexed first and second signal groups for each frequency band , The first separated for each frequency band
And a monitoring means for monitoring the contact information of the elevator and the traveling state of the elevator based on each data represented by the second signal group. In claim 2,
The remote monitoring system according to claim 1, wherein when the remote monitoring center recognizes that there is a sign of abnormality in the elevator based on the traveling state of the elevator, the remote monitoring center simultaneously stops the elevator up to the remote maintenance terminal device. Of the elevator control signal.

[0007]

In the remote monitoring system according to the present invention, the first signal group by the frequency modulation method and the second signal group by the push button signal conversion method are multiplexed from the remote maintenance terminal device to the remote monitoring center via the telephone line. I will send it, so
The second signal group directly detects the traveling state of the elevator, and the traveling state of the elevator can be constantly monitored in real time. Therefore, even when using the telephone line, when the elevator contact information represented by the first signal group is recognized and at the same time a sign of abnormality in the running state of the elevator appears based on the second signal group. The remote monitoring center can recognize this.

[0008]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of a remote monitoring system of an embodiment to which the present invention is applied.

In the remote monitoring system according to this embodiment, an elevator control circuit 1 is provided with an elevator control circuit 2 for controlling an elevator (not shown). An optical fiber 3 for communicating by optical data and a contact signal line 4 for transmitting a failure signal of the elevator as a contact signal are connected between the elevator control circuit 2 and the remote maintenance terminal device 8. There is. Further, an elevator motor 5 that drives the elevator is provided with a pulse generator 6 that collects data that is an element for detecting the speed and position of the elevator. The pulse data is sent from the pulse generator 6 to the remote maintenance terminal device 8. For pulse generator signal line 7
Are connected.

On the other hand, the remote maintenance terminal device 8 has an optical data transmitting / receiving section 9 for transmitting / receiving optical data to / from the elevator control circuit 2 through the optical fiber 3, and the contact signal line 4 from the elevator control circuit 2. Of the signal transmitted and transmitted, the data conversion unit 11 for converting the data detected by the optical data transmission / reception unit 9 and the contact signal detection unit 10 into communication data, and the conversion of the data conversion unit 11. The output is FSK data (frequency band 1,300 Hz to 2,10
Modem 12 for converting to 0 Hz) and optical data transceiver 9
A CPU 13 for controlling data communication, which controls the contact signal detector 10, and a CPU 14 for controlling running state data.
A pulse generator data receiving section 15 for receiving a signal from the pulse generator 6 through the pulse generator signal line 7 under the control of the running state data control CPU 14 and converting the received signal into a transmittable state; The conversion output of the receiving unit 15 is PB (push button)
PB dialer 1 for converting signals to pulse data
6 and NCU that is an interface to the telephone line
(Telephone line network control device) 17 .

A remote maintenance device 8 provided with each of the above components.
Is for exchanging signals with the remote monitoring center 19 via the telephone line 18.

The remote monitoring center 19 monitors various states of the elevator while exchanging signals with the remote maintenance terminal device 8. In this embodiment, the NCU is used.
(Telephone line network control device) 20, first band filter 21 that cuts off frequencies other than the range of 1,300 Hz to 2,100 Hz, modem 22, and first display that displays data received by modem 22. Device 23 and 1,300
Second band filter 24 for cutting off frequencies above Hz
And P that receives the traveling state data sent as pulse data using the PB signal from the remote maintenance terminal device 8.
The B pulse data signal receiving section 25, the running state conversion section 26 for converting the pulse signal using the PB signal into the running state data according to the pulse interval, and the data converted by the running state data converting section 26. Second display device 2
7 and an emergency stop device 28 as main parts.

As described above, in this embodiment, the F from the remote terminal device 8 to the remote monitoring center 19 is performed via the telephone line 18.
SK signal, since the frequency band and the FSK signal is also of a performing multiplex transmission for transmitting different PB signal and simultaneously, the remote monitoring sensor 19, the traveling state of the elevator represented by PB signal, a second band Filter 24,
PB signal receiving unit 25, running state data conversion processing unit 26,
The system including the second display device 27 can be monitored in real time. Further, the contact information of the elevator represented by the FSK signal can be monitored in real time in the system including the first bandpass filter 21, the modem 22 and the first display device 23.

Next, the operation of this embodiment will be described.

First, in the remote monitoring center 19, a signal for giving an elevator start command is given from the modem 22 to the NCU 2
When added to 0, a signal giving the elevator start command is transmitted to the remote maintenance terminal device 8 via the telephone line 18. In the remote maintenance terminal device 8, the NCU 17 receives a signal giving an elevator start command, and the received signal giving an elevator start command is data-converted via the modem 12.
The optical data transmitter / receiver 9 converts the optical data to be supplied to the elevator control circuit 2, and the optical data transmitter / receiver 9 converts the optical data to an optical data to give an elevator start command. Then,
Since the elevator control circuit 2 is in the state of receiving the elevator start-up command from the remote monitoring center 19, the elevator motor 5 starts rotating.

At this time, the pulse generator 6 attached to the motor 5 starts counting operation, and the running state data which is the data of the pulse generator 6 is sent to the remote maintenance terminal device 8 in real time by the pulse generator signal line 7. To be done.

As a result, in the remote maintenance terminal device 8, the running state data is received by the pulse generator data receiving section 15 and the PB dialer 16 is used for PB dialing.
It is converted into pulse data using a signal and sent from the NCU 17 to the remote monitoring center 18 via the telephone line 18.

[0019] Then, the remote monitoring center 19, the pulse data using the PB signal (traveling condition data) NCU
However, since the frequency of the PB signal is cut off by the first bandpass filter 21, the running state data is not input to the modem 22.

On the other hand, in the second bandpass filter 24, the P
Since the traveling state data based on the B signal is passed, the traveling state data based on the PB signal is input to the PB signal receiving section 25. Therefore, the PB signal receiving unit 25 calculates the elevator speed and the driving distance of the elevator based on the pulse interval of the PB signal sent from the remote maintenance terminal device 8, and the calculation result is the running state data change processing unit 26.
And is displayed on the second display device 27.

The above description of the operation is for the case where there is no sign of abnormality in the elevator, and is as follows when there is a sign of abnormality in the elevator.

When a sign of abnormality appears in the elevator during operation of the elevator, a failure signal is output as a contact signal from the elevator control circuit 2 and is applied to the contact signal detection unit 10 via the contact signal line 4, so that the data conversion unit From the converted output of 11, the FSK data representing the contact information of the elevator is obtained by the modem 12, and the signal of this FSK data is N
It is transmitted from the CU 17 to the NCU 20 of the remote monitoring center 19 via the telephone line 18. At this time, the PB data signal described above is multiplexed with the FSK data signal and transmitted through the telephone line 18.

Since the FSK data signal passes through the first bandpass filter 21 and is applied to the modem 22, the contact information of the elevator can be monitored by the first display device 23. At this time, since the PB data signal passes through the second bandpass filter 24 and is received by the PB signal receiving unit 25, the traveling state data conversion processing unit 26 can monitor the second display device 27. Further, data indicating the failure content of the elevator based on the contact information of the elevator is obtained by the modem 22, and at the same time, data indicating that an abnormality in the running state of the elevator appears is obtained by the running state data conversion processing unit 26. At this time, the emergency stop device 28 operates, and this emergency stop control signal is transmitted from the NCU 20 to the NCU 17 of the remote maintenance terminal device. Therefore, a command to that effect is added from the remote maintenance terminal device 8 to the elevator control device 2. . Therefore, when a sign of abnormality appears in the elevator, the elevator can be stopped in real time by the elevator control device 2. Also, while the elevator is traveling, it is possible to set call signals and the like from the remote monitoring center while watching the traveling pattern of the elevator (see FIG. 2).

[0024]

[0025]

As described above, according to the present invention,
Since the contact information of the elevator and the data indicating the running state of the elevator can be simultaneously monitored in real time, the elevator can be emergency stopped in real time when a sign of abnormality appears in the elevator, and the elevator can be stopped at a remote location. The reliability of the inspection is greatly improved.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of a remote monitoring system of an embodiment to which the present invention is applied.

FIG. 2 is a diagram showing a display example of traveling state data of an elevator.

[Explanation of symbols]

1 Elevator control panel 2 Elevator control circuit 3 optical fiber 4 contact signal lines 5 motors 6 pulse generator 7 Pulse generator signal line 8 Remote maintenance terminal device 9 Optical data transceiver 10 Contact signal detector 11 Data converter 12 modem 13 CPU for data communication control 14 Running state data control CPU 15 Pulse generator receiver 16 PB dialer 17 NCU (telephone line network control unit) 18 telephone lines 19 Remote monitoring center 20 NCU (telephone line network control unit) 21 bandpass filter 1 22 modem 23 Display device 1 24 bandpass filter 2 25 PB signal receiver 26 Running state data conversion processing unit 27 Display device 2 28 Emergency stop device

Claims (2)

(57) [Claims] 1. A remote monitoring system in which signals are exchanged between a remote maintenance terminal device of an elevator and a remote monitoring center by using a telephone line to monitor various states of the elevator at the remote monitoring center, The maintenance terminal device uses a frequency modulation method corresponding to the contact information of the elevator to know the details of the failure of the elevator.
A first signal group creating means for creating a first signal group according to the formula, and a push button for directly detecting the traveling state of the elevator.
Frequency different from that of the first signal group by the signal conversion method
A second signal group creating means for creating a second signal group of several bands and a first communication means for multiplexing the first and second signal groups and outputting to the telephone line are provided, and the remote monitoring is provided. The center has a second communication means for inputting the multiplexed first and second signal groups via the telephone line, and a frequency for the input multiplexed first and second signal groups. Signal group separating means for separating each band, and monitoring means for monitoring the contact information of the elevator and the traveling state of the elevator based on each data represented by the first and second signal groups separated for each frequency band. A remote monitoring system characterized by being provided with. 2. When the remote monitoring center recognizes that a sign of abnormality appears in the elevator based on the traveling state of the elevator, at the same time, up to the remote maintenance terminal device,
2. The remote monitoring system according to claim 1, further comprising means for sending an elevator control signal for stopping the elevator.