JP2004207954A - Interphone system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To attain direct connection of an external device to a slave unit without the need for new wiring from the inside of a room. <P>SOLUTION: The interphone system comprises: the slave unit 1 for a visitor to call a resident and to make a speech with the resident; a master unit 2 connected to the save unit, responding to a call of the visitor and making a speech; and the external device such as a fingerprint collation device and an electric lock unlocking device connected to the slave unit and activated by supply of power from the master unit, the master unit is provided with a time division multiplexer circuit 32a for using an idle channel not used for transmission of power and a voice signal through time division multiplexing to make communication such as transmission reception of a control signal and a data signal to the slave unit, and the slave unit is provided with a time division multiplexer circuit 16a for using an idle channel not used for transmission of power and a voice signal through time division multiplexing to make communication such as transmission reception of a control signal and a data signal to the master unit. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an intercom system, and particularly to time-division multiplexing or frequency division multiplexing in a wired transmission path between a slave unit and a master unit, by using a channel that is not used for transmitting power and audio signals, thereby enabling an electric lock to be used. The present invention relates to an intercom system capable of transmitting a control signal of an external device around the entrance such as a password unlock button without a new wiring from a room.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, there has been an intercom apparatus or an intercom system to which an external device such as a password unlocking button of an electric lock installed around an entrance can be connected (for example, see Patent Document 1).
[0003]
This patent document 1 includes a main room unit, a door phone slave unit connected to the main room unit, and a password input device. The room main unit is in the living room, and the door phone slave unit and the password input device are equipped with an electric lock. The doorphone slave unit and the security code input device are installed in the vicinity of the entrance door, and the doorphone slave unit and the security code input device are adjacent to each other, and the doorphone slave unit and the living room master unit connected to the doorphone slave unit are configured. There is disclosed an intercom device in which a parent device of a living room is connected to an electric lock controller, and the electric lock controller is connected to an electric lock of a front door with an electric lock.
[0004]
[Patent Document 1] Japanese Patent Application Laid-Open No. 2000-270111 (Pages 2-3, FIG. 1, FIG. 3)
[0005]
[Problems to be solved by the invention]
However, in such a conventional intercom apparatus, when a password input device or an electric lock controller, which is an external device around the entrance, is installed, a control signal from the password input device or the electric lock controller is transmitted. Therefore, it was necessary to perform new wiring from the parent device in the room.
[0006]
SUMMARY OF THE INVENTION The present invention has been made to solve such a conventional difficulty. In an existing wired transmission path used between a slave unit and a master unit, power supply and audio are performed by time division multiplexing or frequency division multiplexing. By transmitting control signals for controlling external devices around the entrance and control signals from the external devices using unused channels that are not used for signal transmission, new wiring from the room is required. It is an object of the present invention to provide an intercom system that allows an external device to be directly connected to a slave unit without using the same.
[0007]
[Means for Solving the Problems]
The intercom system of the present invention that achieves the above object, a child device for a visitor to call and call a resident, a parent device connected to the child device, for answering and calling the call of the visitor, The master unit is connected to the slave unit and consists of external devices such as a fingerprint collation device and an electric lock / unlock device that operate by power supply from the master unit. A time-division multiplexing circuit or a frequency-division multiplexing circuit for performing communication such as transmission and reception of control signals and data signals with a slave unit by using an unused channel not used for transmission is provided. A time-division multiplexing circuit that performs communication such as transmission and reception of control signals and data signals with the master unit by using an empty channel that is not used for transmission of power and audio signals in multiplexing or In which has a wave-number-division multiplexing circuit.
[0008]
According to such an intercom system, when a control signal and a data signal are output from an external device connected to the slave unit, the time division multiplexing circuit or the frequency division multiplexing circuit of the slave unit converts the control signal and the data signal. Allocated to unused channels not used for transmission of power and audio signals, and multiplexed to the parent device. The master unit extracts a control signal and a data signal from an external device from the multiplexed multiplexed signal and processes the information so that the resident can recognize the information. In addition, the control signal and data signal generated by the master unit are transmitted by the time-division multiplexing circuit or the frequency division multiplexing circuit of the master unit to the control signal and the data signal on an empty channel that is not used for power supply or transmission of the audio signal. Multiplex transmission to the assigned slave unit. The slave unit extracts a control signal and a data signal from the master unit from the multiplexed multiplexed signal, processes the information so that the resident can recognize the information, and transmits the information to an external device. Or
[0009]
In addition, the intercom system of the present invention that achieves the above object provides a sub unit for a visitor to call and call a resident and image the visitor, and is connected to the sub unit and responds to the call of the visitor. It comprises a master unit for calling and displaying the captured image, and external devices such as a fingerprint collation device and an electric lock / unlock device connected to the slave unit and operated by power supply from the master unit. The device uses a time-division multiplexing circuit or a frequency-division multiplexing circuit or a frequency-division multiplexing circuit that performs communication such as transmission and reception of control signals and data signals with slave units by using an unused channel that is not used for transmission of power and audio signals. The slave unit is provided with a division multiplexing circuit, and the slave unit transmits a power supply, an audio signal, a control signal for controlling a camera for imaging a visitor, and a video signal by time division multiplexing or frequency division multiplexing. In which is provided a control signal with the master unit, the division multiplexing circuit or frequency division multiplexing circuit when performing communication such as data transmission and reception signals by using a vacant channel that is not used for.
[0010]
According to such an intercom system, when a control signal and a data signal are output from an external device connected to the slave unit, the time division multiplexing circuit or the frequency division multiplexing circuit of the slave unit converts the control signal and the data signal. Allocated to an unused channel not used for transmission of a power supply, a voice signal, a control signal for controlling a camera for photographing a visitor, and a video signal, and multiplex transmission to the master unit. The master unit extracts a control signal and a data signal from an external device from the multiplexed multiplexed signal and processes the information so that the resident can recognize the information. In addition, the control signal and data signal generated by the master unit are transmitted by the time-division multiplexing circuit or the frequency division multiplexing circuit of the master unit to the control signal and the data signal on an empty channel that is not used for power supply or transmission of the audio signal. Multiplex transmission to the assigned slave unit. The slave unit extracts a control signal and a data signal from the master unit from the multiplexed multiplexed signal, processes the information so that the resident can recognize the information, and transmits the information to an external device. Or
[0011]
Further, in the intercom system of the present invention, the external device includes a password unlock button for inputting an electrical lock password for unlocking the electrical lock, and password data received by input from the password unlock button. It comprises an electric lock controller for unlocking the electric lock when the pre-registered personal identification number data are compared and matched or when the unlock operation is performed by the master unit.
[0012]
According to such an intercom system, when a signal of personal identification number data is transmitted from the password unlock button to the child device, the child device transmits the data signal to the electric lock controller. Is compared with pre-registered personal identification number data, and when they match, the electric lock is unlocked. Further, when the unlocking operation is performed by the master unit, the time division multiplexing circuit or the frequency division multiplexing circuit of the master unit assigns a control signal for unlocking the electric lock to an unused channel which is not used and to the slave unit. After performing the multiplex transmission, the slave unit takes out a control signal for unlocking the electric lock from the multiplexed multiplexed signal and transmits the control signal to the electric lock controller, so that the electric lock controller unlocks the electric lock. Can be.
[0013]
Further, in the intercom system of the present invention, the external device is configured by a home delivery locker device that issues a receipt by operating the parent device.
[0014]
According to such an intercom system, when a signal of arrival information is output from the home delivery locker device, the time division multiplexing circuit or the frequency division multiplexing circuit of the slave unit assigns the arrival signal to an unused channel that is not used. The parent machine extracts the arrival signal from the home delivery locker device from the multiplexed multiplexed signal, and notifies that the home delivery locker device has arrived. When the resident confirms the arrival information and presses, for example, a receipt button provided in the master unit, the receipt signal is assigned to an unused channel which is not used and multiplex-transmitted to the slave unit, and the slave unit is multiplex-transmitted. Since the receipt signal for driving the receipt unit of the home delivery locker device is extracted from the multiplexed signal and transmitted to the home delivery locker device, a receipt can be issued from the receipt unit.
[0015]
Further, in the intercom system of the present invention, the external device includes a fingerprint authentication reader for inputting a fingerprint for unlocking the electric lock, fingerprint data received by input from the fingerprint authentication reader, and fingerprint data registered in advance. And an electric lock controller that unlocks the electric lock when they match and when the unlock operation is performed by the master unit.
[0016]
According to such an intercom system, when a fingerprint data signal is transmitted from the fingerprint authentication reader to the slave unit, the slave unit transmits the data signal to the electric lock controller. The registered fingerprint data is compared, and if they match, the electric lock is unlocked. Further, when the unlocking operation is performed by the master unit, the time division multiplexing circuit or the frequency division multiplexing circuit of the master unit assigns a control signal for unlocking the electric lock to an unused channel which is not used and to the slave unit. After performing the multiplex transmission, the slave unit takes out a control signal for unlocking the electric lock from the multiplexed multiplexed signal and transmits the control signal to the electric lock controller, so that the electric lock controller unlocks the electric lock. Can be.
[0017]
Further, in the intercom system of the present invention, the external device includes a fingerprint authentication reader for inputting a fingerprint for unlocking the electric lock, and an electric lock controller for unlocking the electric lock. Has a dedicated server that is connected via wired communication and the Internet, compares the fingerprint data received by input from the fingerprint authentication reader with the previously registered fingerprint data, and notifies the electric lock controller that the fingerprint data matches. It is a thing.
[0018]
According to such an intercom system, when a fingerprint data signal is output from the fingerprint authentication reader, the time division multiplexing circuit or the frequency division multiplexing circuit of the slave assigns the data signal to an unused channel that is not used. The master unit extracts the fingerprint data signal from the fingerprint authentication reader from the multiplexed multiplexed signal and transmits it to a dedicated server via wired communication and the Internet. The fingerprint data is compared with pre-registered fingerprint data, and if they match, a signal indicating that they match is transmitted to the parent device via the Internet and wired communication. The circuit allocates a control signal for unlocking the electric lock to an unused channel and multiplex-transmits it to the slave, and the slave multiplexes the signal. And the multiplexed signals come, and transmits to the electric lock controller takes out the control signal for unlocking the electric lock, electric lock controller can be unlock electric lock.
[0019]
Further, in the intercom system of the present invention, the external devices are connected in series with a slave set as a repeater. This makes it possible to shorten the line length of the wired transmission line serving as the signal line, and also enables crossover wiring.
[0020]
Further, in the intercom system of the present invention, the external devices are connected in parallel with a slave set as a repeater. Thus, since each signal from a plurality of external devices can be transmitted individually, a circuit configuration for transmitting the signal can be simplified.
[0021]
Embodiment of the present invention
Hereinafter, preferred embodiments of the intercom system of the present invention will be described in detail with reference to the drawings.
[0022]
As shown in FIG. 2, the intercom system of the present invention, as shown in FIG. 2, allows a visitor to call a resident and to call the resident and to capture an image of the visitor. A master unit 2 for displaying a captured image during a call and an external device 3 such as a fingerprint collation device or an electric unlocking device connected to the slave unit 1 and operated by power supply from the master unit 2. It is composed of
[0023]
As shown in FIG. 1, the base unit 2 includes a base unit interface 21 (hereinafter, referred to as a "base unit I / F 21"), a speaker 22, a microphone 23, a digital video codec 24, a JPEG codec 25, a CPU 26, a RAM 27, It comprises an operation button 28 (hereinafter referred to as "I / O 28"), a ROM 29, a LAN connection terminal 30, a call detection circuit 31, a power supply circuit 33, and an image display unit 34.
[0024]
A CPU 26, a call detection circuit 31, and a digital video codec 24 are connected to a parent device I / F 21 for connecting to the child device 1 via a transmission line L1, and a speaker 22, a microphone 23, and a digital video codec are connected to the CPU 26. 24, a JPEG codec 25, a RAM 27, an I / O 28, a ROM 29, a LAN connection terminal 30, and an image display unit 34. Further, the call detection circuit 31 connected to the parent device I / F 21 is connected to the CPU 26, the digital video codec 24 connected to the CPU 26 is connected to the JPEG codec 25, and the JPEG codec 25 is stored in the RAM 27 connected to the CPU 26. It is connected. The power supply circuit 33 is connected to each component of the parent device 2 so that power can be supplied to each component.
[0025]
The master unit I / F 21 performs time-division multiplexing to perform communication such as transmission and reception of a control signal and a data signal with the slave unit 1 by using an idle channel which is not used for power supply or audio signal transmission by time division multiplexing. The circuit 32a is provided.
[0026]
The slave unit 1 includes a slave unit interface 11 (hereinafter, referred to as “slave unit I / F 11”), a camera 12, a speaker 13, a microphone 14, a call button 15, and a power supply circuit 17.
[0027]
A camera 12, a speaker 13, a microphone 14, a call button 15, and a power supply circuit 17 are connected to a slave I / F 11 for connecting to the master 2 via a transmission line L 1. Are connected to the external device connection terminals T11 to T14.
[0028]
In addition, the slave unit I / F 11 uses a vacant channel that is not used for transmission of a power supply, an audio signal, a control signal for controlling the camera 12 for capturing an image of a visitor, and a video signal by time division multiplexing. And a time-division multiplexing circuit 16a for performing communication such as transmission and reception of control signals and data signals with the control signal 2.
[0029]
The operation of the intercom system configured as described above will be described using specific external devices.
[0030]
Example 1
In the first embodiment, as shown in FIG. 3, the external device 3 (FIG. 2) includes a password unlock button 4 for inputting a password for unlocking an electrical lock 61 provided on the door 6. And the secret number data received by input from the secret unlocking button 4 is compared with the pre-registered secret number data, and when they match or when the unlocking operation is performed by the base unit 2, the electric lock 61 is unlocked. And an electric lock controller 5.
[0031]
The password unlocking button 4 is connected to, for example, an external device connection terminal T11 of the child device 1, the electric lock controller 5 is connected to, for example, an external device connection terminal T12 of the child device 1, and the electric lock controller 5 is connected to the door 6. It is connected to the provided electric lock 61.
[0032]
In such an intercom system, when a visitor presses the call button 15 of the handset 1, a call signal is transmitted to the call detection circuit 31 via the handset I / F11, the transmission line L1, and the base unit I / F21. You. When this call signal is detected by the CPU 26, under the control of the CPU 26, operating power is supplied from the power supply circuit 33 of the parent device 2 to the child device 1. By the supply of the operation power, each unit (circuit) constituting the slave unit 1 is activated, and an analog image signal, which is an image of a visitor captured by the camera 12, is converted into a digital image signal by the slave unit I / F11. Then, the data is transmitted to the JPEG codec 25 via the transmission path L1, the parent device I / F 21, and the digital video codec 24. The digital image signal is compressed by the JPEG codec 25 and stored in the RAM 27. The digital image signal stored in the RAM 27 is read out to the ROM 29, and a digital image signal, which is an image of the visitor captured by the camera 12, is transmitted from the ROM 29 to the CPU 26. The CPU 26 converts the digital image signal into an analog image signal. Is transmitted to the image display unit 34, so that the image of the visitor captured by the camera 12 is displayed on the image display unit 34.
[0033]
At the same time, the analog signal of the sound collected by the microphone 14 of the slave 1 is converted into a digital audio signal by the slave I / F 11 and transmitted to the CPU 26 via the transmission line L1 and the master I / F 21. The digital audio signal is converted into an analog audio signal by the CPU 26 and emitted from the speaker 22 of the base unit 2. Further, the analog signal of the sound collected by the microphone 23 of the base unit 2 is converted into a digital sound signal by the CPU 26 and transmitted to the slave unit I / F 11 via the base unit I / F 21 and the transmission line L 1. The digital audio signal is converted into an analog audio signal by the slave I / F 11 and is emitted from the speaker 13 of the slave 1.
[0034]
In this state, when an analog signal of personal identification number data is output from the security unlocking button 4, this analog personal identification number data signal is transmitted to the slave I / F 11 of the slave 1 via the external device connection terminal T11. The slave I / F 11 transmits the analog password data signal to the electric lock controller 5 via the external device connection terminal T12. The electric lock controller 5 compares the personal identification number data with the pre-registered personal identification number data, and if they match, transmits an unlocking signal to the electric lock 61, so that the electric lock 61 is unlocked.
[0035]
When an unlocking operation is performed with the unlocking button of the I / O 28 of the base unit 2, an analog release signal is transmitted from the unlock button 28 to the CPU 26, and the CPU 26 converts the analog release signal into a digital release signal and converts the analog release signal into a digital release signal. To the device I / F 21. The time-division multiplexing circuit 32a of the parent device I / F 21 embeds this digital release signal in a frame allocated to an unused channel that is not used, and transmits the digital release signal to the child device I / F11 of the child device 1 via the transmission line L1. The time-division multiplexing circuit 16a of the slave I / F 11 takes out the digital release signal from this frame, converts it into an analog release signal, and sends it to the electric lock controller 5 via the external device connection terminal T12. 5 allows the electric lock 61 to be unlocked.
[0036]
Example 2
In the second embodiment, as shown in FIG. 4, the external device 3 (FIG. 2) includes a home delivery locker device 7 that issues a receipt by operating the parent device 2. The home delivery locker device 7 is connected to, for example, an external device connection terminal T11.
[0037]
In such an intercom system, when an analog signal of arrival information is output from the home delivery locker device 7, this analog arrival information signal is transmitted to the slave I / F11 of the slave 1 via the external device connection terminal T11. The slave unit I / F 11 converts the analog arrival information signal into a digital arrival information signal, and in the time-division multiplexing circuit 16a, assigns the unused channel to the unused channel and incorporates it into the frame. It transmits to I / F21. The time-division multiplexing circuit 32a of the parent device I / F 21 extracts the digital arrival information signal from this frame and transmits it to the CPU 26. The CPU 26 converts the digital arrival information signal into an analog arrival information signal and notifies the analog arrival information signal from the speaker 22 or the like.
[0038]
When the resident confirms the arrival information and presses the receipt button of the I / O 28 of the base unit 2, an analog receipt signal is transmitted from the receipt button 28 to the CPU 26, and the CPU 26 converts the analog receipt signal into a digital receipt signal. To the parent device I / F 21. The time-division multiplexing circuit 32a of the parent device I / F 21 embeds this digital acknowledgment signal in a frame allocated to an unused unused channel and transmits it to the child device I / F11 of the child device 1 via the transmission line L1. The time-division multiplexing circuit 16a of the slave I / F 11 takes out the digital receipt signal from this frame, converts it into an analog receipt signal, and transmits it to the home delivery locker device 7 via the external device connection terminal T11. The receipt section (not shown) of 7 is driven and a receipt is issued from the receipt section.
[0039]
Note that the call, call, and camera functions are the same as those in the first embodiment, and a description thereof will not be repeated.
[0040]
Example 3
In the third embodiment, as shown in FIG. 5, the external device 3 (FIG. 2) includes a fingerprint authentication reader 8 for inputting a fingerprint to unlock an electric lock 61 provided on the door 6, and a fingerprint authentication reader. The electronic lock controller 5 unlocks the electric lock 61 when the fingerprint data received by the input from the reader 8 and the registered fingerprint data are compared and matched or when the unlock operation is performed by the base unit 2. It is configured.
[0041]
The fingerprint authentication reader 8 is connected to, for example, an external device connection terminal T11, the electric lock controller 5 is connected to, for example, the external device connection terminal T12, and the electric lock controller 5 is connected to an electric lock 61.
[0042]
In such an intercom system, when a fingerprint is input by the fingerprint authentication reader 8 and an analog signal of fingerprint data is output, the analog fingerprint data signal is transmitted to the slave unit of the slave unit 1 via the external device connection terminal T11. The handset I / F11 transmits the analog fingerprint data signal to the electric lock controller 5 via the external device connection terminal T12. The electric lock controller 5 compares the fingerprint data with the pre-registered fingerprint data, and if they match, transmits an unlock signal to the electric lock 61, so that the electric lock 61 is unlocked.
[0043]
When an unlocking operation is performed with the unlocking button of the I / O 28 of the base unit 2, an analog release signal is transmitted from the unlock button 28 to the CPU 26, and the CPU 26 converts the analog release signal into a digital release signal and converts the analog release signal into a digital release signal. To the device I / F 21. The time-division multiplexing circuit 32a of the parent device I / F 21 embeds this digital release signal in a frame allocated to an unused channel that is not used, and transmits the digital release signal to the child device I / F11 of the child device 1 via the transmission line L1. The time-division multiplexing circuit 16a of the slave I / F 11 takes out the digital release signal from this frame, converts it into an analog release signal, and sends it to the electric lock controller 5 via the external device connection terminal T12. 5 allows the electric lock 61 to be unlocked.
[0044]
Note that the call, call, and camera functions are the same as those in the first embodiment, and a description thereof will not be repeated.
[0045]
Example 4
In the fourth embodiment, as shown in FIG. 6, the external device 3 (FIG. 2) includes a fingerprint authentication reader 8 for inputting a fingerprint for unlocking the electric lock 61, and unlocking the electric lock 61. The electronic lock controller 5 is connected to the LAN connection terminal 30 of the base unit 2 via the wired communication and the Internet 10, and receives the fingerprint data received by the input from the fingerprint authentication reader 8 and the fingerprint registered in advance. A dedicated server 11 is provided for comparing the data and notifying the electric lock controller 5 of a match.
[0046]
The fingerprint authentication reader 8 is connected to, for example, an external device connection terminal T11, the electric lock controller 5 is connected to, for example, the external device connection terminal T12, and the electric lock controller 5 is connected to an electric lock 61.
[0047]
In such an intercom system, when a fingerprint is input by the fingerprint authentication reader 8 and an analog signal of fingerprint data is output, the analog fingerprint data signal is transmitted to the slave unit of the slave unit 1 via the external device connection terminal T11. The handset I / F11 converts the analog fingerprint data signal into a digital fingerprint data signal, and the time-division multiplexing circuit 16a assigns it to an unused channel in a frame which is not used and incorporates it into a frame via the transmission line L1. The data is transmitted to the parent device I / F 21 of the device 2. The time-division multiplexing circuit 32a of the parent device I / F 21 extracts a digital fingerprint data signal from this frame and transmits it to the CPU 26. The CPU 26 converts the digital fingerprint data signal into a signal for the Internet 10 and transmits the signal from the LAN connection terminal 30 to the dedicated server 11 via the wired communication and the Internet 10, and the dedicated server 11 transmits the fingerprint data and the fingerprint registered in advance. The data is compared with the data, and if they match, a signal indicating that they match is transmitted to the parent device 2 via the Internet 10 and wired communication. The matching signal input to the CPU 26 via the LAN connection terminal 30 of the parent device 2 is transmitted from the CPU 26 to the parent device I / F 21 as a digital release signal. The time-division multiplexing circuit 32a of the parent device I / F 21 embeds this digital release signal in a frame allocated to an unused channel that is not used, and transmits the digital release signal to the child device I / F11 of the child device 1 via the transmission line L1. The time-division multiplexing circuit 16a of the slave I / F 11 takes out the digital release signal from this frame, converts it into an analog release signal, and sends it to the electric lock controller 5 via the external device connection terminal T12. 5 allows the electric lock 61 to be unlocked.
[0048]
Note that the call, call, and camera functions are the same as those in the first embodiment, and a description thereof will not be repeated.
[0049]
In the above-described embodiment, the slave I / F 11 of the slave 1 has the time division multiplexing circuit 16a, and the master I / F 21 of the master 2 has the time division multiplex circuit 32a. The present invention is not limited to this, and the power supply, the audio signal, the control signal for controlling the camera 12 for imaging the visitor, and the vacant space not used for the transmission of the video signal are provided in the child device I / F 11 of the child device 1 by frequency division multiplexing. A frequency division multiplexing circuit 16b for performing communication such as transmission / reception of a control signal and a data signal with the master unit 2 by using a channel is provided. A frequency division multiplexing circuit 32b for performing communication such as transmission and reception of a control signal and a data signal with the slave unit 1 by using an unused channel not used for transmission may be provided.
[0050]
Since the frequency division multiplexing circuits 16b and 32b are analog transmission unlike the time division multiplexing circuits 16a and 32a by digital transmission, as shown in FIG. 7, the power supply, the audio signal, the data signal, the video signal, and the The control signal used for communication with the device 2 and the extension signal which is a data signal are changed to different frequencies and transmitted, and are separated on the receiving side by a filter. As a result, similarly to the time division multiplexing circuits 16a and 32a, the external device 3 can be directly connected to the slave unit 1 without requiring new wiring from the room. Note that an analog image signal, which is an image of a visitor captured by the camera 12 and transmitted from the child device 1, is converted into a digital image signal by the digital video codec 24.
[0051]
Further, the intercom system of the present invention can obtain the same effect even in a system in which the camera 12 is not provided in the slave unit 1 and the image display unit 34 is not provided in the master unit 2.
[0052]
In such an intercom system of the present invention, as shown in FIG. 8, the external devices 3 may be connected in series with the slave 1 as a repeater, or may be connected in parallel with the slave 1 as a repeater. It may be connected. Since the external devices 3 are connected in series, the line length of the wire transmission line serving as a signal line can be shortened, and crossover wiring becomes possible. As shown in FIG. 9, the external devices 3 are connected in parallel. Since each signal from a plurality of external devices can be transmitted individually, the circuit configuration for transmitting signals can be simplified.
[0053]
【The invention's effect】
As is apparent from the above description, according to the intercom system of the present invention, transmission of power and audio signals by time division multiplexing or frequency division multiplexing on an existing wired transmission line used between a slave unit and a master unit. By transmitting control signals to control external devices around the entrance using unused channels that are not being used for external devices, external devices can be directly connected to the child device without requiring new wiring from the parent device in the room. Can be connected.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a preferred embodiment of an intercom system of the present invention.
FIG. 2 is a configuration diagram showing a specific embodiment of the intercom system of the present invention.
FIG. 3 is a configuration diagram showing a specific embodiment of the intercom system of the present invention.
FIG. 4 is a configuration diagram showing a specific embodiment of the intercom system of the present invention.
FIG. 5 is a configuration diagram showing a specific embodiment of the intercom system of the present invention.
FIG. 6 is a configuration diagram showing a specific embodiment of the intercom system of the present invention.
FIG. 7 is an explanatory diagram showing multiplexing of extension signals in frequency division multiplexing by the intercom system of the present invention.
FIG. 8 is a configuration diagram showing another preferred embodiment of the intercom system of the present invention.
FIG. 9 is a configuration diagram showing another preferred embodiment of the intercom system of the present invention.
[Explanation of symbols]
1 ...
2 ... Master unit
3 External devices
4 ... Password unlock button
5 ... Electric lock controller
6 Electric lock
7. Home delivery locker device
8. Fingerprint authentication reader
10 ... Internet
11 ... Dedicated server
16a ····· Time division multiplexing circuit
16b... Frequency division multiplexing circuit
32a ····· Time division multiplexing circuit
32b... Frequency division multiplexing circuit

Claims (8)

A handset (1) for a visitor to call and call a resident; a base unit (2) connected to the handset for answering the call of the visitor and making a call; Connected to an external device (3) such as a fingerprint collation device or an electric lock / unlock device that operates by power supply from the master device,
The master unit uses a time-division multiplexing or frequency division multiplexing method to transmit and receive control signals and data signals to and from the slave unit by using an idle channel that is not used for power supply or audio signal transmission. A circuit (32a) or a frequency division multiplexing circuit (32b),
The slave unit performs time-division multiplexing or frequency-division multiplexing to perform communication such as transmission and reception of a control signal and a data signal with the master unit by using an idle channel that is not used for power supply or audio signal transmission. An intercom system comprising a circuit (16a) or a frequency division multiplexing circuit (16b). A sub unit (1) for a visitor to call a resident and image the visitor, and connected to the sub unit, responding to the call of the visitor, calling and displaying an image taken And an external device (3), such as a fingerprint collation device or an electric lock / unlock device, connected to the slave device and operated by power supply from the master device,
The master unit uses a time-division multiplexing or frequency division multiplexing method to transmit and receive control signals and data signals to and from the slave unit by using an idle channel that is not used for power supply or audio signal transmission. A circuit (32a) or a frequency division multiplexing circuit (32b),
The slave unit uses the time-division multiplexing or the frequency division multiplexing to use a power supply, an audio signal, a control signal for controlling a camera for capturing an image of a visitor, and an idle channel that is not used for transmitting a video signal. An intercom system comprising a time division multiplexing circuit (16a) or a frequency division multiplexing circuit (16b) for performing communication such as transmission / reception of a control signal and a data signal to / from the communication system. The external device includes a password unlock button (4) for inputting an electrical lock password for unlocking the electrical lock (61), and password data received by input from the password unlock button. An electric lock controller (5) for unlocking the electric lock when the registered personal identification number data are compared and matched or when the unlock operation is performed by the master unit. 3. The intercom system according to claim 1 or 2. The intercom system according to claim 1 or 2, wherein the external device comprises a home delivery locker device (7) for issuing a receipt by operating the master device. The external device includes a fingerprint authentication reader (8) for inputting a fingerprint to unlock the electric lock (61), and a fingerprint data received by input from the fingerprint authentication reader and fingerprint data registered in advance. The electric lock controller (5) for unlocking the electric lock when a comparison is made or when the unlock operation is performed by the master unit (3). Intercom system. The external device includes a fingerprint authentication reader (8) for inputting a fingerprint to unlock the electric lock (61), and an electric lock controller (5) for unlocking the electric lock.
The master unit is connected via wired communication and the Internet (10), compares the fingerprint data received by the input from the fingerprint authentication reader with the pre-registered fingerprint data, and notifies the electric lock controller that the fingerprint data matches. 3. The intercom system according to claim 1, further comprising a dedicated server for notifying. The intercom system according to claim 1, wherein the external device is connected in series with the slave unit as a relay unit. The intercom system according to claim 1, wherein the external device is connected in parallel with the slave unit serving as a repeater.

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