JP6800073B2 - Intercom device - Google Patents

Description

The present invention relates to an intercom device for a visitor to call a resident, and more particularly to an intercom device having a function of receiving broadcast radio waves such as radio broadcasting.

A receiving antenna is required to receive broadcast radio waves such as radio broadcasts, but if installed indoors, the radio waves may not be received stably, so install it outdoors and connect it to the intercom device with a cable. I needed it. In that respect, if you want to get information from the radio, portable radios that can be easily moved and do not need to be connected to an external antenna have become widespread, and until now there was not much need to provide a radio reception function in the intercom device. ..
On the other hand, there is an intercom device that uses an electric device installed at home. For example, in Patent Document 1, a television broadcast receiving device installed at home is used, and a camera of an entrance slave unit installed at the entrance of the intercom device. There was one that made it easier to confirm the visitor by displaying the captured image of the above on the screen of the TV broadcast receiver.

JP-A-2007-150473

However, in preparation for various disasters that have frequently occurred in recent years, there is a need for a means of promptly transmitting necessary information to residents and local residents. For example, emergency notification broadcasts using FM radio waves are attracting attention and text. There is also a system that broadcasts emergency information by digital broadcasting that can transmit information.
Therefore, if the intercom device can have a radio function to receive such emergency information, it is possible to listen to the emergency information by the intercom device that is always fixedly installed in the living room or the like even if the radio is not prepared. It is preferable.

Therefore, in view of such a problem, an object of the present invention is to provide an intercom device having a function of satisfactorily receiving broadcast radio waves such as radio broadcasts without separately connecting a receiving antenna.

In order to solve the above problems, the invention of claim 1 is a front door slave unit installed at the entrance for a visitor to call a resident, and a living room parent for the resident to answer a call from the front door slave unit. An interphone device having a machine, the entrance slave unit has a receiving antenna for receiving a broadcast signal and a down converter for down-converting the received broadcast signal, and the down-converted broadcast signal is transmitted. While being transmitted to the living room master unit via a line, the living room master unit notifies the broadcast signal processing unit that directly demotes the transmitted broadcast signal or demotes the transmitted broadcast signal via an upconverter, and the demodulated audio signal. It is characterized by having a sound unit.
According to this configuration, since the receiving antenna is provided in the entrance slave unit installed outdoors, it is possible to receive the broadcast radio wave better than in the case where it is provided in the living room master unit arranged indoors. Since the received broadcast signal is down-converted and transmitted to the master unit in the living room, it is possible to transmit the broadcast signal without significantly attenuating it even if the transmission line is a pair of cables, and the wiring of the conventional intercom device. Can be used without changing.

The invention of claim 2 is a digital broadcast in which the broadcast signal to be transmitted transmits text information in addition to audio information in the configuration according to claim 1, and the broadcast signal processing unit adds emergency information to the broadcast signal. It has an emergency information discriminating unit that discriminates when the information is generated, an emergency information display unit that displays emergency information, a notification unit that notifies that emergency information has been received, and an emergency information discriminating unit that discriminates emergency information. Then, it is characterized by having an alarm control unit for displaying the character information included in the emergency information on the emergency information display unit while causing the notification unit to perform the notification operation.
According to this configuration, when emergency information is received, it is displayed, and the notification unit operates to notify, so that the resident can easily recognize it.

The invention of claim 3 has, in the configuration of claim 2, a state confirmation unit for confirming the reception state of emergency information and a state display unit for displaying the confirmation result, and the state confirmation unit is a broadcast signal. Among the test signal and the normal broadcast signal of the added emergency information, at least the test signal is used to confirm the reception status, and the confirmation result is displayed on the status display unit.
According to this configuration, the resident can be relieved because it can be periodically recognized at least by the test signal of the emergency information whether the reception is performed normally.

According to the invention of claim 4, in the configuration according to any one of claims 1 to 3, a broadcast signal transmission control for stopping the transmission of a broadcast signal from the entrance slave unit to the living room master unit during a calling operation and a call state. It is characterized by having a part.
According to this configuration, since the broadcast signal is not transmitted to the living room master unit during the ringing operation / in the call state, it is possible to prevent a situation in which the transmission path is blocked by the broadcast signal and a smooth call cannot be made.

According to the present invention, since the receiving antenna is provided in the entrance slave unit installed outdoors, the broadcast signal can be received better than in the case where the receiving antenna is provided in the living room master unit arranged indoors. Since the received broadcast signal is down-converted and transmitted to the master unit in the living room, it is possible to transmit the broadcast signal without significantly attenuating it even if the transmission line is a pair of cables, and the wiring of the conventional intercom device. Can be used without changing.

It is a block diagram which shows an example of the intercom apparatus which concerns on this invention, and shows each device by a block diagram. It is a block diagram which shows other form of a living room master unit.

Hereinafter, embodiments embodying the present invention will be described in detail with reference to the drawings. FIG. 1 shows an example of an intercom device according to the present invention, and is a block diagram showing each device. 1 is an entrance slave unit installed at the entrance for a visitor to call a resident, and 2 is a living room master unit for a resident to answer a call from the entrance slave unit 1. Both are a pair of transmission lines. It is connected by L1.

The entrance slave unit 1 includes a microphone 11 and a speaker 12 for talking, a CODEC unit 13 for digital / analog conversion of an audio signal, a call button 14 for calling operation, a camera 15 for imaging a visitor, and an imaging of the camera 15. Video processing unit 16 that performs video signal modulation processing, reception antenna 17 for receiving broadcast radio waves, low noise amplifier (LNA) 18 for amplifying received broadcast signals, bandpass filter (BPF) for removing noise 19. It is provided with a down converter 20 that lowers the transmission frequency, a slave unit communication IF21 for communicating with the living room master unit 2 via the transmission line L1 and the like. Further, the down converter 20 is composed of an oscillator 20a, a mixer circuit 20b, a low-pass filter (LPF) 20c, and the like.
Here, a case will be described in which the receiving antenna 17 receives a digital broadcast in which character information is transmitted in addition to voice information.

The living room master unit 2 includes a microphone 31 and a speaker 32 for talking, a CODEC 33 for digital / analog conversion of an audio signal, an audio signal processing unit 34 for switching a call and switching between a call and a broadcast, and an image captured by a camera 15. , A monitor 35 that displays emergency information, a video processing unit 36 that processes displayed video / images, an upconverter 37 that up-converts the broadcast signal transmitted from the entrance slave unit 1, and audio signal and text information by demodulating the broadcast signal. Broadcast signal processing unit 38 separated into, operation unit 39 that performs various operations, indicator light 40 for notifying the occurrence of an abnormality, master unit CPU 41 that controls the living room master unit 2, and entrance slave unit 1 via transmission line L1. It is equipped with a master unit communication IF42 or the like that communicates with.
The broadcast signal processing unit 38 has a function of an emergency information determination unit that determines if emergency information is added to the received broadcast signal. The upconverter 37 is composed of an oscillator 37a, a mixer circuit 37b, and a high-pass filter (HPF) 37c for extracting signal information.

The operation of the intercom device configured as described above is as follows. However, the operation related to the call from the entrance slave unit 1, the response from the room master unit 2 that received the call, and the operation that the camera 15 is activated by the call operation and the captured image is displayed on the monitor 35 of the room master unit 2. Is the same as the conventional one, so the description thereof will be omitted. Here, the reception of the broadcast radio wave and the control operation after the reception will be described.
The broadcast signal received by the receiving antenna 17 is amplified and then down-converted by the down converter 20 and transmitted to the living room master unit 2 via the transmission line L1.

In the living room master unit 2, the transmitted broadcast signal is up-converted to the original broadcast signal frequency by the up converter 37, and then demodulated by the broadcast signal processing unit 38. After that, under the control of the master unit CPU 41, the audio signal is reported from the speaker 32 via the audio signal processing unit 34, and the character information is displayed on the monitor 35 via the video processing unit 36.

Then, if emergency information is added to the broadcast signal, the broadcast signal processing unit 38 recognizes it and notifies the master unit CPU 41. Upon receiving the notification of the reception of the emergency information, the master unit CPU 41 activates the indicator light 40 to issue an alarm and sounds the alarm sound from the speaker 32. For example, the LED is blinked and the buzzer sounds to notify the resident that the emergency information has been received. After that, the content of the emergency information is sounded from the speaker 32 and displayed on the monitor 35.

Further, when the call button 14 of the entrance slave unit 1 is operated to receive the call signal, the master unit CPU 41 further waits while a communication path is formed between the entrance slave unit 1 and the living room master unit 2. For example, the operation of the LNA 18 is stopped to stop the transmission of the broadcast signal. By doing so, since the broadcast signal is not transmitted to the living room master unit 2 during the ringing operation / in the call state, it is possible to prevent a situation in which the transmission line L1 is blocked by the broadcast signal and a smooth call cannot be made.

Further, the master unit CPU 41 executes control for confirming the reception state of the broadcast radio wave, and when the broadcast signal processing unit 38 recognizes the test signal added to the broadcast signal periodically or at the time of transmitting emergency information, the result is displayed. The resident is notified by the display of the light 40 or the monitor 35.
The reception status may be confirmed by radio waves of normal broadcasting, and can be confirmed by using RSSI or CNR (C / N ratio). When confirming by using normal broadcasting, for example, at weekly intervals. You can also check with, and residents can feel relieved by checking frequently.

In this way, since the receiving antenna 17 is provided in the entrance slave unit 1 installed outdoors, it is possible to receive broadcast radio waves better than in the case where the receiving antenna 17 is provided in the living room master unit 2 arranged indoors. Then, since the received broadcast signal is down-converted and transmitted to the living room master unit 2, even if the transmission line L1 is a 1-pair cable, the broadcast signal can be transmitted without being significantly attenuated, and the wiring of the conventional intercom device is changed. Can be used without.
Further, when the emergency information is received, it is displayed on the monitor 35, and the indicator light 40 and the speaker 32 as the notification unit perform the notification operation, so that the resident can easily recognize it.
Furthermore, the resident can be relieved that the reception of the broadcast is performed normally or at least can be periodically recognized by the test signal of the emergency information. In addition, since the received radio wave is amplified by the LNA 18, the gain of the receiving antenna 17 may be small, the receiving antenna 17 can be miniaturized, and it can be easily incorporated in the entrance slave unit 1.

FIG. 2 shows another configuration of the living room master unit 2, and is different from the configuration of FIG. 1 in that there is no upconverter. The broadcast signal processing unit 38 is composed of an IC-based circuit, and some ICs do not require up-conversion due to a change in the local frequency for internal demodulation. When such an IC is used, it can be configured without an upconverter as shown in FIG.

If the living room master unit 2 is provided with an absence setting function that records a visitor's video when a visitor is received when the person is away, the text information and the like are saved when emergency information is received at the time of the absence setting. Residents who have returned home may be able to confirm.

1 ... Entrance slave unit, 2 ... Living room master unit, 17 ... Reception antenna, 18 ... LNA, 20 ... Down converter, 32 ... Speaker (sound signal section, notification section), 35 ... Monitor (emergency) Information display unit, status display unit), 36 ... video processing unit, 37 ... upconverter, 38 ... broadcast signal processing unit (emergency information discrimination unit), 40 ... indicator light (notification unit, status display unit), 41 ... Master unit CPU (alarm control unit, broadcast signal transmission control unit, status confirmation unit), L1 ... transmission line.

Claims (4)

An intercom device having an entrance slave unit installed at the entrance for a visitor to call a resident and a living room master unit for the resident to answer a call from the entrance slave unit.
The entrance slave unit has a receiving antenna for receiving a broadcast signal and a down converter that down-converts the received broadcast signal, and the down-converted broadcast signal is transmitted to the living room master unit via a transmission line. While being transmitted to
The living room master unit is characterized by having a broadcast signal processing unit that directly demodulates the transmitted broadcast signal or demodulates the transmitted broadcast signal via an upconverter, and a sound sound unit that reports the demodulated audio signal. Interphone device. The broadcast signal to be transmitted is a digital broadcast that transmits text information in addition to audio information.
The broadcast signal processing unit has an emergency information determination unit that determines when emergency information is added to the broadcast signal, and also has an emergency information determination unit.
An emergency information display unit that displays emergency information, a notification unit that notifies that emergency information has been received, and a notification unit.
A claim characterized by having an alarm control unit for displaying the character information included in the emergency information on the emergency information display unit while causing the notification unit to perform a notification operation when the emergency information determination unit determines the emergency information. Item 1. The intercom device according to item 1. It has a status confirmation unit that confirms the reception status of emergency information and a status display unit that displays the confirmation result.
The claim is characterized in that the state confirmation unit confirms the reception state by at least the test signal among the test signal and the normal broadcast signal of emergency information added to the broadcast signal, and displays the confirmation result on the state display unit. Item 2. The intercom device according to item 2. The invention according to any one of claims 1 to 3, further comprising a broadcast signal transmission control unit that stops transmission of a broadcast signal from the entrance slave unit to the room master unit during a call operation and a call state. Intercom device.

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