JP2008072630A - Intercom system for multiple dwelling house - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress variance in sound volume of a simultaneous broadcast among a plurality of house units. <P>SOLUTION: Since each house unit 2 includes a sound volume correction part 30 which corrects the sound volume of the simultaneous broadcast, the variance in sound volume of simultaneous broadcast among the plurality of house units 2 can be suppressed. Further, the correction amount of a sound volume correction part 30 of each house unit 2 is designated with a control signal from a simultaneous broadcasting device (alarm monitor board 5), so the trouble to estimate transmission loss in individual house units 2 is eliminated to lower the cost of the system on the whole. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention is an assembly that enables communication by alternatively establishing a communication path between a common unit device installed at a common entrance of an apartment house and any one of the dwelling units installed in each dwelling unit. With regard to residential intercom systems, in particular, in addition to individual calls in which a common unit device and one dwelling unit make a one-on-one call, a plurality of dwelling units are provided by a simultaneous broadcasting device installed in a common unit or a manager's room of an apartment house. The present invention relates to an intercom system for collective housing that can broadcast audio to the machine all at once.

Conventionally, a common area device (lobby interphone) installed at the common entrance of an apartment house and capable of voice input and output and a common area device installed at each dwelling unit of an apartment house are connected via a transmission line and shared. A plurality of dwelling units (such as an interphone master unit and a housing information panel) that establish communication paths with the shared unit device when a visitor selects a selection means (such as a numeric keypad) that the unit device has. A doorphone handset connected to each dwelling unit in a housing complex connected via a cordless handset connection line, and a dwelling unit installed in a common area or a manager's room of the housing and transmitted to each dwelling unit There is provided an intercom system for collective housing provided with a simultaneous broadcasting device that is connected via a track and broadcasts audio to all or some of the dwelling units all at once (for example, Patent Document 1 or Reference).
JP-A-6-14125 JP 2003-16557 A

  By the way, depending on the size of the housing complex, the length of the transmission line from the simultaneous broadcasting device to each dwelling unit may range from several hundred meters to several kilometers, and the number of connected dwelling units and the trunk line equipment (common unit device) And the number of broadcast devices) vary depending on the size of the housing complex, so the transmission loss of the transmission line due to the impedance of the wiring, dwelling unit, and trunk line equipment also deteriorates, and the volume of the broadcast in the dwelling unit decreases. There was a problem that the sound volume varied between the dwelling units. Note that the decrease in volume can be dealt with by amplifying the broadcast audio signal, but it is not possible to suppress the variation in volume between individual dwelling units. Here, “transmission loss” is defined as a change in the amplitude and phase of the received signal with respect to the transmission signal and the amount of change between the two points in the transmission system (between the simultaneous broadcasting device and each dwelling unit in the above example). Is done.

  This invention is made | formed in view of the said situation, The objective is to provide the intercom system for collective housing which can suppress the dispersion | variation in the volume of the simultaneous broadcast between several dwelling units.

  In order to achieve the above object, the present invention provides a common unit device that is installed at a common entrance of an apartment house and capable of inputting and outputting audio, and a common unit device that is installed at each dwelling unit of the apartment house via a transmission line. Multiple units that establish a communication path with the common unit device and a common unit or management of the apartment house The unit is installed in a person's room and connected to each dwelling unit via a transmission line, and is provided with a simultaneous broadcasting device that broadcasts audio to all or some of the dwelling units at the same time. It consists of a control line that transmits a control signal that occurs in response to an operation and instructs the start of an individual call, and a signal line that transmits an audio signal. Call means to make calls, Both a speaker for sounding a broadcast sound, an individual call / broadcast switching means for selectively switching between a state in which the signal line is connected to the call means and a state in which the signal line is connected to the speaker, and an individual call / broadcast switching means, Volume correction means provided between the speakers for correcting the volume of the broadcast to a value within a predetermined range, and control for controlling the individual call / broadcast switching means based on a control signal transmitted through the control line And a control unit of the dwelling unit stores a correction amount instructed by a control signal from the simultaneous broadcasting apparatus and causes the volume correction unit to perform volume correction with the correction amount.

  According to the present invention, since each dwelling unit is equipped with a volume correction unit that corrects the volume of the broadcast so that it becomes a value within a predetermined range, the number of dwelling units to be broadcast and the number of dwelling units It is possible to suppress the variation in the volume of the broadcast broadcast among a plurality of dwelling units without adjusting the amplification degree of the broadcast broadcast audio signal in accordance with the wiring length. Moreover, since the correction amount in the sound volume correction means of each dwelling unit is instructed from the simultaneous broadcasting device by a control signal, it is not necessary to estimate the transmission loss in each dwelling unit, and the cost of the entire system can be reduced.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  The structural example of the intercom system for apartment houses of this embodiment is shown in FIG. In the present embodiment, a common unit device (lobby intercom) 1 installed at a common entrance of an apartment house and a plurality of dwelling units 2 installed in each dwelling unit are provided, and the lobby intercom 1 and the dwelling unit 2 include It is connected via a transmission line. The transmission line includes a trunk line L1 connected to the lobby intercom 1 and a branch line L2 connected to each dwelling unit 2. Further, the trunk line control device for distributing the trunk line L1 to a plurality of systems (not shown). 3 is provided. As this transmission line, a multi-pair twisted pair cable having three or more pairs in the sheath is used. In the illustrated example, a communication line La that transmits an audio signal between the lobby intercom 1 and the dwelling unit 2; A video signal Lb for transmitting a video signal picked up by a camera (not shown) provided in the lobby intercom 1 and a control signal for designating the dwelling unit 2 selected by the selection means (described later) of the lobby intercom 1 are provided. A pair line is used for each control line Lc to be transmitted. That is, the transmission line of the illustrated example uses three pairs of pair wires. Here, the video signal transmitted through the video line Lb is frequency-modulated by the lobby intercom 1 and is demodulated by the video processing unit 12 provided in each dwelling unit 2 and displayed on the monitor unit 13 as will be described later. .

  Although not shown, the lobby intercom 1 includes a microphone and a speaker for inputting / outputting sound, a camera for imaging a visitor, a selection key having a number key for designating a dwelling unit number and a call button, and When the call button is operated after the number key is operated to select the visited unit number, the unit 2 corresponding to the unit number is selected. Here, a simultaneous broadcasting device (alarm monitoring panel) 5 is connected to the lobby intercom 1 via the communication line La and the control line Lc, and the dwelling unit number selected on the lobby intercom 1 is alerted via the control line Lc. When transmitted to the monitoring board 5, the alarm monitoring board 5 sends a control signal (call command) to the dwelling unit 2 corresponding to the dwelling unit number via the control line Lc.

  On the other hand, the dwelling unit 2 includes a microphone 21 and a speaker 22 that input and output audio, and the microphone 21 and the speaker 22 are connected to the call processing unit 24 via amplifiers 23a and 23b, respectively. Also connected to the call processing unit 24 is a two-wire / four-wire conversion unit 25 for converting the transmission paths on the reception side and the transmission side and the two-line communication line La into two-wire / four-wires through amplifiers 26a and 26b. ing. The call processing unit 24 compares the level of the voice signal (received signal) transmitted via the call line La and the level of the voice signal (transmitted signal) output from the microphone 21 to compare the call state (received state or transmitted state). When a call state is estimated, a loss is inserted into the transmission path of the transmission signal, and when a transmission state is estimated, a loss is inserted into the transmission path of the reception signal. And an echo canceler for eliminating acoustic echo generated by acoustic coupling between the microphone 21 and the speaker 22. However, since such voice switches and echo cancellers are well known in the art, detailed illustration and description of the configuration and operation are omitted. Therefore, an audio signal can be exchanged between the lobby intercom 1 and the dwelling unit 2 through the communication line La, and the visitor and the dwelling can be accommodated by using the lobby intercom 1 and the resident using the dwelling unit 2. Voice calls can be made with a person.

  Further, in the dwelling unit 2, the communication line La and the video line Lb of the branch line L2 are respectively connected to a transmission path (hereinafter referred to as “call path”) and a video signal transmission path. A main line interface unit 14 is provided. The transmission path of the video signal is connected to the video processing unit 12, and the communication path is connected to the call / broadcast switching unit 15. The call / broadcast switching unit 15 selectively switches between a state where the speech path connected to the trunk interface unit 14 is connected to the speech path switching unit 16 and a state where the speech path is connected to a volume correction unit 30 which will be described later. It is. Further, the communication path switching unit 16 is the same as the state in which the communication path connected to the two-wire / four-line conversion unit 25 is connected to the telephone / broadcast switching unit 15 and the state in which the communication path is connected to the handset interface unit 18 described later. It selectively switches between a state of connection to another dwelling unit (not shown) installed in the dwelling unit.

  The door phone slave unit 6 is connected to the slave unit interface unit 18 connected to the speech path switching unit 16 via the slave unit connection line L3. The door phone sub-unit 6 is disposed at the entrance of each dwelling unit of the apartment house and includes a microphone and a speaker. Therefore, when the speech path switching unit 16 is switched to a state in which the speech path connected to the 2-wire 4-wire conversion unit 25 is connected to the slave unit interface unit 18, between the doorphone slave unit 6 and the dwelling unit 2. Is possible. Further, the door phone slave unit 6 is provided with a television camera, and the slave unit interface unit 18 separates the audio signal and the video signal transmitted via the slave unit connection line L3, and the separated video signal is transmitted via the transmission line. It can be output to the video processing unit 12 and displayed on the monitor unit 13. Further, the door phone slave unit 6 is provided with a call button, and has a function of sending a call signal to the slave unit connection line L3 when the call button is operated, and the dwell unit 2 has a notification sound when the call signal is detected. The ringing tone generated by the generation unit 27 is transmitted from the speaker 22.

  In the dwelling unit 2, a liquid crystal display or a CRT is used for the monitor unit 13. The video signal input to the dwelling unit 2 through the video line Lb is balanced-unbalanced converted by the main line interface unit 14, further amplified by an amplifier, and then frequency demodulated by the video processing unit 12. The video signal input to the dwelling unit 2 through the slave unit connection line L3 is also balanced-unbalanced converted by the slave unit interface unit 18, further amplified by an amplifier, and then frequency-demodulated by the video processing unit 12. The video signal output from the video processing unit 12 is input to the monitor unit 13, thereby displaying a video on the screen of the monitor unit 13. That is, since the image of the visitor imaged by the camera of the lobby intercom 1 or the door phone slave unit 6 is displayed on the monitor unit 13 of the dwelling unit 2, the resident in the dwelling unit can confirm the visitor. .

  In addition, the notification sound generation unit 27 generates a notification sound for notification of a call from the lobby intercom 1 or the door phone slave unit 6 and outputs the generated notification sound to the speaker 22 via the amplifier 28a. Is output as a back tone to the branch line L2 or the slave unit connection line L3. That is, the back tone transmission path switching section 17 is connected to the notification sound generation section 27 via the amplifier 28b, and the back tone transmission path switching section 17 selects the back tone transmission destination as the branch line L2 and the slave unit connection line. Alternatively, it is switched to L3.

  The dwelling unit 2 is provided with a main control unit 10 that controls the internal circuit with a CPU as a main component, and a control signal transmission / reception unit 11 that is an interface with the control line Lc is connected to the main control unit 10. The control signal transmission / reception unit 11 has a function of sending the control signal output from the main control unit 10 to the control line Lc and delivering the control signal received from the control line Lc to the main control unit 10.

  The volume correction unit 30 is composed of an amplifier having a variable amplification level, and amplifies the broadcast broadcast audio signal with a predetermined amplification level (correction amount) set by the main control unit 10 as will be described later. Perform volume correction.

  By the way, the branch line L2 is branched from the trunk line L1 via the branching device 7, and the trunk line control apparatus 3 directly connects the trunk lines L1 of each system. Therefore, the control signal sent from the lobby intercom 1 is transmitted to all the dwelling units 2 connected to the control line Lc. Here, an address (for example, a dwelling unit number) is individually set in the main control unit 10 of the dwelling unit 2, and a control signal (call command) for designating an address is selected by selecting the address in the lobby intercom 1. It is possible to transmit from the alarm monitoring panel 5 to all the dwelling units 2 via the control line Lc. If the address included in the control signal is its own address, the main control unit 10 of the dwelling unit 2 activates the video processing unit 12 and the monitor unit 13 to display the video of the visitor captured by the camera of the lobby intercom 1 The notification sound (calling sound) generated by the notification sound generation unit 27 is transmitted from the speaker 22 while being displayed on the monitor unit 13 of the machine 2. When the resident presses a response button (not shown) of the dwelling unit 2 in response to the ringing tone, the main control unit 10 controls the call / broadcast switching unit 15 and is connected to the main line interface unit 14. The communication path is switched to a state where it is connected to the communication path switching unit 16 and the communication path switching unit 16 is controlled to connect the communication path connected to the two-wire / four-line conversion unit 25 to the calling / broadcast switching unit 15. By switching to the state and establishing a communication path with the lobby intercom 1, it is possible to make a call only between the lobby intercom 1 and the selected dwelling unit 2, and the selected dwelling unit 2 It is possible to display the visitor imaged by the camera only on the monitor unit 13. When the dwelling unit 2 selected in the lobby intercom 1 establishes a communication path with the lobby intercom 1, the end of the call using an appropriate operation button is detected in the lobby intercom 1 or dwelling unit 2. Then it ends.

  When the call button of the door phone slave unit 6 is pressed and a call signal is sent to the slave unit connection line L3, the main control unit 10 of the dwelling unit 2 that has detected the call signal causes the video processing unit 12 and the monitor unit 13 to detect the call signal. Is displayed on the monitor unit 13 of the dwelling unit 2 and the notification sound (calling sound) generated by the notification sound generation unit 27 is output from the speaker 22. Send it out. When the resident presses a response button (not shown) of the dwelling unit 2 in response to the ringing tone, the main control unit 10 controls the speech path switching unit 16 to connect to the 2-line 4-line conversion unit 25. The communication path between the doorphone slave unit 6 and the dwelling unit 2 can be communicated by switching the communication path thus established to a state where it is connected to the slave unit interface unit 18 and establishing a communication path with the doorphone slave unit 6. It is possible to display the visitor imaged by the camera on the monitor unit 13.

  On the other hand, the alarm monitoring panel 5 is installed in a manager's room of an apartment house, etc., and has a function of calling and broadcasting to each dwelling unit 2 via the call line La, and each dwelling unit via the control line Lc. 2 has a function for instructing the start and end of broadcast. For example, when performing broadcast to all the dwelling units 2 from the alarm monitoring panel 5, a control signal (simultaneous broadcast start command) instructing the start of the broadcast from the alarm monitoring panel 5 is sent to each dwelling unit via the control line Lc. In each dwelling unit 2 that has been transmitted to the machine 2 and received this control signal, the main control unit 10 controls the call / broadcast switching unit 15 in response to the broadcast start command, and the call connected to the main line interface unit 14 The communication path is established with the alarm monitoring board 5 by switching the path to the state connected to the volume correction unit 30, and a broadcast audio signal (hereinafter referred to as "broadcast audio signal") sent from the alarm monitoring board 5 is established. Is transmitted to each dwelling unit 2 via the communication line La. In each dwelling unit 2, the volume correction unit 30 automatically corrects the volume of the broadcast audio signal, and the volume-corrected broadcast audio signal is sent from the speaker 22.

  As shown in FIG. 1, the alarm monitoring panel 5 includes a control unit 50 having a CPU as a main component, a control signal transmission / reception unit 51 serving as an interface between the control unit 50 and the control line Lc, and a telephone handset (handset) ) 52, amplifiers 53a and 53b for amplifying the transmission signal and the reception signal, and a two-line four-line conversion unit that performs two-line four-line conversion between the transmission line on the reception side and the transmission side and the two-line communication line La. 54 and a state in which the transmission side amplifier 53b is connected to the communication line La via the 2-wire 4-wire conversion unit 54, and is connected to the communication line La via the amplifier 58 without passing through the 2-wire 4-line conversion unit 54. A call / broadcast switching unit 57 that selectively switches between states, and an open / close switch unit 59 that is inserted between the call line La connected to the lobby intercom 1 and the call line La connected to the trunk line control device 3. And has. Although not shown, the alarm monitoring panel 5 is provided with a number key for designating a dwelling unit number and a selection means having a call button, and an administrator operates the number key to select any dwelling unit number. If the dwell unit 2 corresponding to the dwelling unit number is selected by operating the call button after selection, a communication path is formed between the selected dwelling unit 2 and only the dwelling unit 2 is connected to the dwelling unit 2 by the handset 52. You can make a call. During such a call, the call / broadcast switching unit 57 is switched by the control unit 50 to a state where the amplifier 53b on the transmission side is connected to the call line La via the 2-wire 4-wire conversion unit 54 and the open / close switch unit 59 Is opened and the lobby intercom 1 is disconnected from the main line L1.

  Next, the operation of the alarm monitoring panel 5 and each dwelling unit 2 when performing simultaneous broadcasting to a plurality of dwelling units 2 from the alarm monitoring panel 5 in the present embodiment will be described. First, when an administrator presses a broadcast start button (not shown) provided on the alarm monitoring panel 5 at the start of the broadcast, the control unit 50 controls the alarm monitoring panel 5 to instruct the start of the broadcast. A signal (broadcast start command) is transmitted from the control signal transmitting / receiving unit 51 to each dwelling unit 2 via the control line Lc.

  The control signal transmitted from the alarm monitoring panel 5 is received by all the dwelling units 2 that are the target of simultaneous broadcasting. In the dwelling unit 2 that has received the control signal, the main control unit 10 prepares for the start of broadcast in response to the broadcast start command. That is, the main control unit 10 controls the call / broadcast switching unit 15 to switch the communication path connected to the main line interface unit 14 to the state of connecting to the volume correction unit 30 and is notified in advance from the alarm monitoring panel 5. Then, the correction amount (amplification degree) stored in the memory (not shown) is set in the volume correction unit 30.

  When the administrator performs broadcast using the handset 52, the broadcast audio signal output from the handset 52 is sent to the call line La via the call / broadcast switching unit 57 and the amplifier 58. The broadcast broadcast audio signal transmitted from the alarm monitoring panel 5 via the call line La is input from the main line interface unit 14 to the volume correction unit 30 via the call / broadcast switching unit 15, and the main control unit 10. Since the volume correction unit 30 corrects (amplifies) the volume with the correction amount (amplification degree) set by the above, the volume of the broadcast is corrected from the speaker 22.

  When the handset 52 is on-hooked to end the broadcast, the control unit 50 of the alarm monitoring panel 5 controls the control signal (broadcast end command) for instructing the end of the broadcast from the control signal transmission / reception unit 51. After transmission to each dwelling unit 2 via the line Lc, the open / close switch unit 59 is closed to return to the standby state. Further, in the dwelling unit 2 that has received the control signal, the main control unit 10 stops the operation of the volume correction unit 30 and controls the call / broadcast switching unit 15 to connect the communication path connected to the main line interface unit 14. The state is switched to the state of connection to the speech path switching means 16, and the standby state is restored.

  As described above, according to the present embodiment, since each dwelling unit 2 includes the volume correction unit 30 that corrects the volume of the broadcast, the number of the dwelling units 2 to be broadcast and the number of the dwelling units 2 are as follows. The broadcast signal (alarm monitoring panel 5) adjusts the amplification level of the broadcast audio signal according to the wiring length of the unit, or adjusts the impedance of the transmission line for each dwelling unit 2 according to the wiring length during construction. Thus, it is possible to suppress the variation in the volume of the simultaneous broadcasting between the plurality of dwelling units 2 without taking the time and effort.

  Moreover, about the correction amount of the sound volume correction | amendment part 30, it is instruct | indicated beforehand by the control signal with respect to each dwelling unit 2 from the alarm monitoring board 5, and the main control part 10 of the dwelling unit 2 has memorize | stored in memory. That is, the transmission loss depends on the wiring length from the alarm monitoring panel 5 to the dwelling unit 2, and generally the transmission loss increases as the wiring length increases. The transmission loss is also considered to be about the same. Accordingly, since the wiring length from the alarm monitoring panel 5 to each dwelling unit 2 can be calculated at the system design stage, it is assumed that a transmission loss corresponding to the calculated wiring length occurs, and the correction amount of each dwelling unit 2 is set. A control signal for instructing the correction amount may be transmitted from the alarm monitoring panel 5 to each dwelling unit 2 at the time of determination and the first activation after the system construction or the system change. As a result, there is an advantage that it is not necessary to estimate the transmission loss in each dwelling unit 2, and the cost of the entire system can be reduced.

It is a system configuration figure showing an embodiment of the present invention.

Explanation of symbols

1 Lobby intercom (common equipment)
2 dwelling units 5 Alarm monitoring panel (broadcasting equipment)
21 Microphone 22 Speaker 30 Volume corrector (volume corrector)

Claims (1)

The common unit device that is installed at the common entrance of the apartment house and can input and output voice, and the common unit device that is installed in each dwelling unit of the apartment house is connected via a transmission line and the selection unit that the common unit device has Are selected by the visitor's operation, multiple dwelling units that establish a communication path with the common unit device, and each dwelling unit installed in the common unit or manager's room of the apartment house is a transmission line And a broadcast device that broadcasts audio to all or some of the dwelling units at the same time,
The transmission line comprises at least a control line that transmits a control signal that is generated in accordance with the operation of the selection means and instructs the start of an individual call, and a signal line that transmits an audio signal.
The dwelling unit has a communication means for making an individual call with a shared device via a signal line, a speaker that rings at least a broadcast sound, a state in which the signal line is connected to the communication means, and a state in which the speaker is connected An individual call / broadcast switching unit that selectively switches between, a volume correction unit that is provided between the individual call / broadcast switching unit and the speaker and corrects the volume of the broadcast to a value within a predetermined range; Control means for controlling the individual call / broadcast switching means based on a control signal transmitted through the control line,
The dwelling unit intercom system is characterized in that the control unit of the dwelling unit stores the correction amount instructed by the control signal from the simultaneous broadcasting device and causes the volume correction unit to perform volume correction with the correction amount.

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