JPH0771164B2 - Elevator call device Call control system - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an elevator intercom system, and more particularly, to a telephone system between an intercom system provided in a car of an elevator and a intercom system provided at a monitoring station. The present invention relates to a call control system for an elevator call device that makes a call via a line.

[Prior Art] The call control method of the elevator call device according to the related art is not a two-way communication such as a telephone method in order to prevent howling etc. in consideration of the echo, background noise, etc. in the elevator car. The call control is performed by the talk system, and the operator of the monitoring station manually switches the communication direction between the communication device inside the elevator car and the communication device arranged at the monitoring station. For this reason, the call control system according to the related art of this type cannot switch a natural conversation because the conversation between the two communication devices is interrupted due to the switching operation at the time of switching the call direction.

Note that, as a conventional technology related to the communication control method of the communication device of this kind of elevator, the technology described in, for example, JP-A-58-17079 and JP-A-61-12581 is known.

[Problems to be Solved by the Invention] In the above-mentioned conventional technology, when a call is made by a press talk system between a call device in an elevator car and a call device installed at a monitoring station, control of the call direction is performed. However, there is a problem that the conversation between the communication devices is interrupted when switching the communication direction.

An object of the present invention is to solve the above-mentioned problems of the prior art and to automatically control the switching of the communication direction between the communication device in the elevator car and the communication device arranged at the monitoring station. Provided is an elevator intercommunication device call control method that enables conversations to be natural by not interrupting conversations between the intercommunication devices even at the moment when the conversation direction is switched between both intercom devices. It is in.

[Means for Solving the Problems] According to the present invention, the object is to provide a call direction control device in a monitoring station, wherein the call direction control device outputs respective voices from the communication devices in the car and the monitoring station. By comparing the signal levels and controlling the gain of the attenuator for the audio signal in each direction based on the result, only the audio signal with the higher level is transmitted to the other side, and the audio signal level in both directions is transmitted. When the same, the call direction is switched so that the voice signal from the monitoring station side is given priority and transmitted to the car side, and when the voice signal levels in both directions momentarily reverse, the call direction is switched. It is achieved by not doing.

That is, when the call direction control device tries to output voice from both the call device in the car and the call device arranged at the monitoring station to the call devices of the other parties at the same time, the voice level in the call direction is high. Only the voice of the other party is enabled and the voice is output to the other party's communication device, and if the voice levels are the same, the voice signal from the monitoring station side is given priority and the voice is output to the car side communication device, and the call When there is a momentary reversal of the voice level, the call is made to continue, whereby the object of the present invention can be achieved.

[Operation] When a voice trying to transmit from the intercom in the elevator car to the intercom located in the monitoring station and a voice trying to output from the intercom in the monitoring station to the intercom in the car occur at the same time , The call direction control device detects the levels of both voice signals and compares which one is greater, and the voice signal sent from the call device in the car to the monitoring station is When the level is high, the gain of the voice attenuator for the voice signal from the intercom in the monitoring station to the intercom in the car is lowered, and only the voice signal from the intercom in the car to the intercom in the monitoring station is output. Conversely, if the audio signal level from the intercom in the monitoring station to the intercom in the car is higher than the reverse audio signal level, the intercom in the car The gain of the voice attenuator with respect to the voice signal to the communication device in the monitoring station is lowered so that only the voice signal from the communication device in the monitoring station to the communication device in the car is output. As a result, the communication direction between the communication devices is automatically switched between the direction from the car to the monitoring station and the direction from the monitoring station to the car according to the audio signal level in each direction. Since this switching is performed instantly, the conversation is not interrupted.

Also, as a result of comparing the audio signal levels from the communication devices in the car and the monitoring station, when the audio signal levels in both directions are the same, the audio signal from the monitoring station side is given priority and transmitted to the car side. Since the call direction is switched as described above, the passenger in the car can be surely notified of the instruction from the monitoring station side. Furthermore, as a result of the comparison described above, when the voice signal levels in both directions are momentarily reversed, the call direction is not switched, so it is possible to make the call unstable and impair the call quality. Can be prevented.

By providing the call direction control device in the monitoring station, only one call direction control device needs to be provided for the elevator call devices installed in a large number of buildings, and the entire system can be inexpensive. Can be configured.

[Embodiment] An embodiment of an elevator communication device call control system according to the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a block diagram showing the overall configuration of an embodiment of the present invention, FIG. 2 is a block diagram showing the configuration of a call direction control device, and FIG. 3 is a diagram for explaining the state of voice levels between communication devices. , FIG. 4 is a block diagram showing the structure of the level detector. 1 and 2, BL1 to BLn are buildings and BC
Is a monitoring station, 1 is an elevator device, 2 is an elevator control device, 3 is a control information acquisition device, 4 is a line switching device, 5 is a call direction control device, 6 and 8 are line control devices, 7
Is a telephone line, 9 is a monitoring device, 14 is a car, 15 and 19 are intercoms, 18 is a management panel, 21 is a communication device, 22 is a display device, 31 is a transmission attenuator, 32 is an attenuator control unit,
Reference numeral 33 is a reception attenuator, 34 and 36 are level detectors, and 35 and 37 are back ground noise monitors.

The embodiment of the present invention shown in FIG.
Elevator device 1 installed in each of 1 ~ BLn,
It shows the case of remote monitoring at the monitoring station BC connected via the telephone line 7, and only the configuration of the elevator device in the building BL1 is shown, but other buildings BL2 to BLn have the same configuration. Elevator equipment is installed.

In FIG. 1, an elevator system 1 includes a car 14 and a suspension weight 11 suspended from a sheep 13 by a rope 16, and an elevator controller 2 controls an electric motor 12 to control the car. 14 are configured to service each floor of the building. An intercom 15, which is a communication device, is installed in the car 14,
This intercom 15 is equipped with a control panel 18 and an intercom 19 provided in a building management room via a tail cord 17.
And the line switching device 4.

In addition, the control information acquisition device 3 acquires various elevator control information from the elevator control device 2 and
Output to the line switching device 4 for sending to BC. The line control device 6 controls communication with the line control device 8 of the monitoring station BC via the telephone line 7, and is provided with a known automatic dial device and the like. Surveillance station BC is a telephone
Monitoring device 9 including 21, display device 22, various button switches, etc.
The building is configured so that the line control device 8 selects and calls buildings BL1 to BLn to perform communication, and the monitoring device 9 can monitor the elevator devices installed in each building.

In the embodiment of the present invention configured as described above and shown in FIG. 1, when a passenger in the car 14 operates the intercom 15 in an emergency of the elevator, first, the intercom 19 in the manager's room is called, In the absence of a manager or in a building that does not have such a manager's room, the automatic dialing device of the line controller 6 is operated via the line switching device 4 and the call direction controller 5, and the telephone line is activated. 7
The calling device 21 is called up via the line control device 8 on the side of the monitoring station BC. This allows the guards at the guard station BC to talk to the passengers in the car 14. At this time, the call direction between the observer and the passenger in the car 14 is controlled by the call direction control device 5.

The call direction control device 5 is configured as shown in FIG. 2. The configuration of the call direction control device 5 and its control operation will be described below with reference to FIG. In the following description, the call transmitted from the intercom 15 in the elevator car 14 to the intercom 15 in the surveillance station BC is referred to as the call, and the intercom 15 in the elevator car 14 is communicated from the intercom 15 in the surveillance station BC to the intercom 15 in the elevator car 14. The call is received.

The call direction control device 5 includes a transmission attenuator 31 that sets a gain for a transmission voice signal flowing from the transmission side input terminal 41 to the transmission side output terminal 42, and a level detector 34 that detects the level of the transmission voice signal. , A background noise monitor 35 for detecting background noise signals mixed in the transmitted voice, a receiving attenuator 33 for setting a gain for the receiving side voice signal flowing from the receiving side input terminal 43 to the receiving side output terminal 44, and the receiving side A level detector 36 for detecting the level of a voice signal, a back ground noise monitor 37 for detecting a background noise signal mixed in a received voice, and detection from the level detectors 34, 36 and back ground noise monitors 35, 37. Receive the signal,
The transmitting attenuator 31 and the receiving attenuator 33 are configured by an attenuator control unit 32 that controls the gain of the attenuator 33.

It is assumed that the voice on the transmitting side and the voice on the receiving side are generated at the same time, and these voice signals are input from the input terminals 41 and 43 to the call direction control device 5 shown in FIG.

At this time, the voice signal on the transmitting side is input to the transmitting attenuator 31 from the input terminal 41 on the transmitting side, and at the same time the level detector is detected.
It is input to 34, and the level detector 34 detects the level of the magnitude. The detection result is input to the attenuator control unit 32. At the same time, the back ground noise monitor 35 receives the detection result from the level detector 34,
Only the voice signal is identified from the background noise mixed in the transmitted voice signal, and the result is sent to the attenuator control unit 32.

On the other hand, the voice signal on the receiving side is input to the receiving attenuator 33 from the input terminal 43 on the receiving side, is also input to the level detector 36, and after the level detector 36 detects the level of the magnitude, The detection result is the attenuator control unit.
Entered in 32. Similarly to the transmitter side, the background noise monitor 37 receives the detection result from the level detector 36, identifies only the voice signal from the background noise mixed in the received voice signal, and outputs the result to the attenuator controller 32. Send to.

The attenuator control unit 32 includes the level detectors 34, 36 described above.
Also, the detection results of the back ground rise monitors 35 and 37 are fetched and the magnitudes of only the voice signal components on the transmitting side and the receiving side are compared. As a result of the comparison, when the voice signal on the transmitting side is larger than the voice signal on the receiving side, the attenuator control unit 32 determines that the gain of the transmitting attenuator 31 is the maximum and the receiving attenuator 33.
The gains of both attenuators are controlled so that the gain of each is minimized. As a result, only the voice signal on the transmitting side is output from the call direction control device 5. That is, in this case, only the audio signal from the intercom 15 in the elevator car 14 is sent to the communication device 21 of the monitoring station BC. On the contrary, when the voice signal level of the receiving side is higher than the voice level of the transmitting side, the gain of the receiving attenuator 33 is controlled to be maximum and the gain of the transmitting attenuator 31 is controlled to be minimum, and only the voice signal of the receiving side is obtained. It is output from the call direction control device 5. In this case, only the voice signal from the communication device 21 in the monitoring station BC is sent to the intercom 15 in the elevator car 14.

In the above operation, when the level of the audio signal on the low audio level side momentarily exceeds the audio signal level on the high audio level side, that is, during a call, the levels of the audio signals in both directions are momentary. If it is reversed, there is a certain time delay in the control operation of the attenuator,
The call direction is not switched, and the call direction is switched by the momentary reversal of the voice signal level to make the call unstable and not to deteriorate the call quality. This will be described below.

Now, as shown in FIG. 3, the average value 52 of the voice signal levels on the transmitting side is larger than the average value 54 of the voice signal levels on the receiving side, and the voice signals on the transmitting side are output from the call direction control device 5. Assume that in this state, the voice signal level 51 on the transmitting side is instantaneously lower than the voice signal level 53 on the receiving side between time t ₁ and time t ₂ . At this time, at time t ₁ , the speech direction control device 5 starts an operation to decrease the gain of the transmitting attenuator 31 and increase the gain of the receiving attenuator 33, but to complete this operation, a certain fixed amount is required. Need time. Therefore, at time t ₂ , this switching operation cannot be completed yet, and the call direction control device 5
Will increase the gain of the transmitting attenuator 31 again and decrease the gain of the receiving attenuator 33 again.
The call direction will not be switched.

As described above, the time after the voice signal level inversion required for switching the call direction does not have to be determined by the time required for controlling the attenuators 31 and 33, and the start of the control operation is delayed by the timer or the like. By doing so, it is possible to arbitrarily set it.

The attenuator control unit 32 compares the voice signal level of the transmitting side with the voice signal level of the receiving side, and when it is determined that the levels of both signals are the same, one of them is determined according to a predetermined priority. The gain of the attenuators 31 and 33 is controlled so that only one voice signal can pass through the call direction control device 5. Generally, the intercom 15 in the elevator car 14 from the communication device 21 of the monitoring station BC. It is considered that the voice of the receiving side to the receiving side is a high priority because it is a command from the observer of the monitoring station BC to the passengers in the elevator car 14, and the attenuator control unit 32 causes the voices of the transmitting side and the receiving side. When the signal levels are the same, the gain of the transmitting attenuator 31 is controlled to be minimum and the gain of the receiving attenuator 33 is controlled to be maximum, and only the voice signal on the receiving side is output from the call direction control device 5, and the receiving direction is received. Control is performed so that the side has priority.

In addition, the level detectors 34 and 36 for detecting the voice signal level in the call direction control device 5 are
Even if the voice signal level on the receiving side is the same, the voice signal level on the transmitting side can be detected higher than the voice signal level on the receiving side by inserting a resistor in the detection circuit, or vice versa. In addition, the voice signal level on the receiving side can be set to be detected higher than the voice signal level on the transmitting side.

Actually, when a call is made between the surveillance staff at the monitoring station BC and the passengers inside the elevator car 14, the passengers inside the car 14 tend to make loud voices, and the call device 21 at the monitoring station BC is used. It is easy for the audio signal not to be sent to the intercom 15 in the car 14. However, by providing the above-mentioned means in the level detectors 34 and 36, such a situation is likely to occur. Can be prevented. Further, in a real conversation, there is always a time when the voice is interrupted, and even when the level of the voice signal from one side is significantly different, the call direction control device 5 can always switch the call direction. .

Next, the detailed configuration and operation of the level detectors 34 and 36 will be described in the fourth section.
It will be described with reference to the drawings.

The level detectors 34 and 36 are a level detection main circuit 61 mainly including an operational amplifier 62 that amplifies a sound signal input from an input terminal 66 to the detector, an additional capacitance 64 and an additional resistor 63 on the input side, It is composed of the additional capacitance 65 on the output side,
The audio signal input from the signal input terminal 66 is an operational amplifier.
The signal is amplified by 62 and output from the signal output terminal 67.
The terminal 68 of the operational amplifier 62 is supplied with a voltage that is 1/2 the power supply voltage that is the operating voltage of the operational amplifier 61, and the output signal from the signal output terminal 67 is output with its amplitude centered around this value. It

In the configuration of the level detector described above, the additional resistor 63 and the additional capacitors 64 and 65 are constants that influence the sensitivity of the level detector, and in particular, the value of the additional resistor 63 is different between the level detectors 34 and 36. By doing so, the detection level of the audio signal can be made different as described above.

Further, this level detector has a short rising time constant and a long falling time constant for the output signal. Therefore, even when the sound level temporarily falls, it takes a certain period of time for the output of the detector to decrease, and accordingly, the instantaneous change of the sound signal level as described with reference to FIG. 3 is required. It is possible to make it difficult for the reverse phenomenon.

According to the above-described embodiment of the present invention, the talking direction between the monitoring station and the elevator car, which is performed by the press talk method, gives the talker an unnatural feeling according to the levels of the audio signals from both sides. You can switch automatically without having to.

In the above-described embodiment of the present invention, for the sake of explanation, the call direction control device for switching the call direction is provided in each building where the elevator device is installed. It is best to install it in common in all buildings in the monitoring station. Because, in this case, for the elevator intercom installed in many buildings,
Only one call direction controller needs to be provided,
This is because the entire system can be constructed at low cost.

[Effects of the Invention] As described above, according to the present invention, the call direction of a call is automatically switched between the communication device in the elevator car and the communication device arranged at the monitoring station. , It is possible to have a natural conversation without interruption.

[Brief description of drawings]

FIG. 1 is a block diagram showing the overall configuration of an embodiment of the present invention, FIG. 2 is a block diagram showing the configuration of a call direction control device, and FIG. 3 is a diagram for explaining the state of voice levels between communication devices. , FIG. 4 is a block diagram showing the structure of the level detector. BL1 to BLn …… Building, BC …… Monitoring station, 1 …… Elevator device, 2 …… Elevator control device, 3 …… Control information acquisition device, 4 …… Line switching device, 5 …… Call direction control device, 6 , 8 …… Line control device, 7 …… Telephone line, 9
…… Monitoring device, 14 …… Car, 15,19 …… Intercom, 18 …… Management board, 21 …… Talking device, 22 …… Display device,
31 …… Sending attenuator, 32 …… Attenuator controller,
33 …… Received attenuator, 34,36 …… Level detector, 35,
37 …… Background noise monitor.

Claims (1)

[Claims] 1. An elevator apparatus having a communication device in a car, and a communication device arranged at a monitoring station for remotely monitoring at least one of the elevator devices. The communication devices are connected by a telephone circuit. In the elevator intercommunication system call control system for making a call, a call direction control device is provided in the monitoring station, and the call direction control device compares the respective voice signal levels from the communication devices in the car and the monitoring station. , Based on the result, by controlling the gain of the attenuator for the audio signal in each direction, only the audio signal on the side with the higher level is transmitted to the other party, and when the audio signal levels in both directions are the same, The call direction is switched so that the audio signal from the monitoring station side is given priority and transmitted to the car side, and the audio signal level in both directions is changed. There when reversed momentarily are elevator call system call control method, characterized in that not switch call direction.