JP4747979B2 - Master unit and intercom system - Google Patents

Description

  The present invention relates to a master unit that communicates with a plurality of slave units and external devices, and an interphone system using the master unit.

  Conventionally, as shown in Japanese Patent Application Laid-Open No. 2006-157178 (Patent Document 1), an interphone system for making a call with a plurality of slave units and external devices is known. In this intercom system, as shown in FIG. 4, two slave units B and one sensor camera C are connected to three pairs of connection terminals provided in the master unit A. The subunit | mobile_unit B is provided with the camera 91 and the telephone call part 92 (speaker, microphone), and the sensor camera C is provided with the camera 93, the telephone call part (not shown), and the human body detection part 94.

On the other hand, since the parent device A is configured such that it cannot make a call simultaneously with a plurality of child devices B and sensor cameras C, it is necessary to select one child device B or the sensor camera C to make a call. Therefore, as shown in FIG. 5, the internal circuit of the base unit A is provided with a switching control unit 95 that is connected to one connection terminal and transmits voice, and is controlled by the switching control unit 95. The handset B or the sensor camera C is selected.
JP 2006-157178 A

  However, in the intercom system which is the above-described conventional example, which sensor terminal C is connected to which connection terminal in order to select one slave unit B or sensor camera C to communicate with in the switching control unit 95. It is indispensable that the master unit A knows in advance. Therefore, it is necessary to register the ID of the sensor camera C set individually at the time of construction in the master unit A, which is a burden on the user and the contractor.

  On the other hand, recently, from the viewpoint of miniaturization and cost reduction of terminals, it is required to connect a large number of external devices such as sensor cameras with a small number of connection terminals, and a plurality of external devices are connected to a pair of connection terminals. A configuration that allows connection is required. However, in such a configuration, the connection state between the master unit and the external device becomes more complicated than the conventional intercom system, and the burden on the user and the contractor is further increased when attempting to register ID. Will increase.

  This invention is invented in view of the said background art, The subject is providing the main | base station and the intercom system which reduced the work burden at the time of construction.

In order to solve the above-mentioned problems, in the invention according to claim 1 of the present application, the power supply means for supplying power to the slave unit, the plurality of slave units that operate by receiving power supply from the power supply unit, and a unique ID are provided. In the master unit provided with a plurality of connection terminals to which a plurality of external devices that operate by acquisition are connected, all the switching means configured to connect the power feeding path and the communication path with one connection terminal, and all All terminal connection means adapted to connect and disconnect the communication path to and from the connection terminal, and when talking to the slave unit, the communication path of all terminal connection means is disconnected and the switching means When the communication path with the slave unit is secured by switching the connection to the connection terminal to which the destination slave unit is connected, and a control signal having an ID unique to the external device is received from the external device, Transmit the control signal with the received ID The Rukoto, and without such a call as one of the external device with the ID in the state in which all terminals connecting means connects the communication path.

Further, in the invention described in claim 2 of the present application, the parent device described in claim 1, the slave device having a unique ID and operating by receiving power supply from the parent device , and the external device operating by independently acquiring power Equipment.

In the invention according to claim 3 of the present application, in the intercom system according to claim 2, the external device is a sensor camera provided with an imaging means, a human body detecting means, and a calling means, and the sensor camera is a human body. When detected, the control signal having its own ID is transmitted to the master unit . When the master unit receives the control signal, the master unit connects the communication path to all terminal connection means and has the received ID. The sensor camera detects the human body by operating the calling means when the ID of the control signal transmitted from the parent device is the same as its own ID. So that you can call.

  In the main unit according to claim 1 or 2, since all the terminal connection means connect the communication path to all the connection terminals, the main unit connects which external device to which connection terminal. It is possible to make a call with a specific external device without knowing whether the call is being made. In addition, since the power supply path and the communication path are connected to one connection terminal by the switching means, it is possible to make a call between the slave and the master. From the above, it is not necessary to register the IDs of external devices set individually in the master unit, and a master unit that reduces the burden during construction and an interphone system using the master unit are provided.

  Moreover, in the intercom system according to claim 3 of the present application, a sensor camera is used as an external device, and this is connected to the parent device according to claim 1 to detect a human body among a plurality of sensor cameras. It becomes possible to make a phone call between the sensor camera and the parent device.

  1 and 2 show a base unit A and an interphone system according to the first embodiment. The master A includes a power supply unit that supplies power to the slave unit B, a plurality of slave units B that operate by receiving power supply from the power supply unit, and a plurality of external devices that operate by independently acquiring power. In the base unit A provided with the connection terminal T, the communication path is connected between all the connection terminals T with the switching means that connects the power supply path and the communication path with the one connection terminal T. And all terminal connection means adapted to be disconnected, and when talking to the slave unit B, the call path of all the terminal connection units is disconnected and the destination slave unit B is connected in the switching means. By switching the connection to the connection terminal T, a communication path with the slave unit B is secured, and when calling with an external device, all terminal connection means connect with the communication path so that the communication with the external device is not performed. ing.

  This intercom system is an intercom system including a master unit A, a slave unit B that operates by receiving power from the master unit A, and a sensor camera C that operates by independently acquiring power. A is configured such that when the sensor camera C detects a human body, it can communicate with the sensor camera C that has detected the human body by connecting a communication path to all terminal connection means.

  Hereinafter, the master unit A and the intercom system of this embodiment will be described in more detail. As shown in FIG. 2, in this intercom system, two slave units B and four sensor cameras C are connected to a master unit A via a transmission line L, and the master unit A and the slave unit B or sensor camera C Video, audio, and control signals are transmitted to and from. Further, an extension master unit D installed in each room in the house is further connected to the master unit A, and images and the like can be transmitted to and from the extension master unit D as well as the master unit A. It is. Note that any number of sensor cameras C may be connected.

  The slave unit B operates by receiving power supply from the master unit A. For example, the slave unit B is installed on the outside of the entrance or entrance door, and includes a camera B1 that images a visitor and a call button B2, and a slit B3 on the front A microphone and a speaker (not shown) are housed inside. The sensor camera C operates by independently acquiring electric power, and includes a camera C1 serving as an imaging unit that images a suspicious person or a householder, a human sensor C2 serving as a human body detection unit, a microphone, and a speaker. A call unit (not shown) serving as a call means and a lighting device C3 are provided, and are installed in, for example, a garden, a house, or a front door.

  Each slave unit B and each sensor camera C have a unique ID, and the microphone provided in the sensor camera C operates only when a control signal having its own ID is transmitted from the master unit A. ing. The IDs of the slave unit B and the sensor camera C need not be registered in the master unit A.

  Further, the exposure, focus, and microphone volume of the cameras B1 and C1 provided in the slave unit B and the sensor camera C can be adjusted. These adjustments are performed in response to a control signal from the master unit A. Also, the adjustment state of the cameras B1, C1, microphones, etc. is transmitted to the main unit A as a control signal. The transmission line L is a two-wire balanced cable.

  The main unit A is supplied with commercial power, and includes a monitor 1 and an operation unit 2 for performing various operations on the front surface, and a microphone and a speaker are housed inside the plurality of holes 3 on the front surface. The base unit A includes three pairs of connection terminals T as shown in the block diagram of FIG. 1, and a plurality of slave units B and sensor cameras C are attached to the connection terminals T via transmission lines L. ing. Although a plurality of devices such as the sensor camera C can be attached to the pair of connection terminals T, the handset B is limited to one device for the pair of connection terminals T.

  The master unit A is provided with a power feeding unit 8a that feeds power to the slave unit B and an auxiliary power feeding unit 8b. The power supply unit 8a is a power supply unit that supplies power necessary for the operation of the slave unit B. The slave unit B does not operate unless power is supplied from the power supply unit 8a. One auxiliary power supply unit 8b is provided for each connection terminal T and always supplies weaker power to the slave unit B than the power supply unit 8a. The subunit | mobile_unit B is only in the standby state, receiving only the electric power supply from the auxiliary electric power feeding part 8b, when the electric power supply from the electric power feeding part 8a is not received.

  Each auxiliary power supply unit 8b is connected to the control unit 9, and the control unit 9 detects a change in voltage applied to the slave unit B. Here, when the call button B2 of the child device B is pushed, the voltage applied to the pushed child device B changes. Therefore, a change in the voltage applied to the slave unit B that has been pushed is detected by the control unit 9, and the control unit 9 is configured to grasp which connection terminal T is connected to the slave unit B that has been pushed. .

  A signal input from the slave unit B and the sensor camera C to the connection terminal T of the master unit A through the transmission line L is transmitted to the demultiplexing circuit 4. Here, since the transmission line L is a two-wire balanced cable and is used for transmission of video signals, audio signals, and control signals and supply of power, the transmission line L has video signals, audio signals, and control signals. Signals are mixed, and these signals are transmitted in a form superimposed on the power supply. Since the video signal, the audio signal, and the control signal have different frequency bands (see JP-A-5-207166, etc.), the signal input from the transmission line L through the connection terminal T is transmitted to the demultiplexing circuit 4 of the parent device A. By separating each frequency band, it is separated into a video signal, an audio signal, and a control signal.

  The video signal separated by the demultiplexing circuit 4 is transmitted to the video unit 7, demodulated in the video unit 7 and input to the monitor 1. The master A transmits video signals by a TDMA (Time Division Multiplexing) system, and can output up to 4 channels of images to the monitor 1 at a time. The control signal separated by the demultiplexing circuit 4 is transmitted to a control unit 9 having a CPU, and the control unit 9 controls the operation of the main unit A in response to the control signal.

  The audio signal separated by the demultiplexing circuit 4 is transmitted to the communication unit including a speaker, a microphone, and the like through the communication paths R1, R2, and R3 connected by the switching circuit 5 and the extra terminal connection circuit 6. Here, the switching circuit 5 and the surplus terminal connection circuit 6 constitute switching means and all-terminal connection means, respectively. The switching circuit 5 is connected to any one of the three communication paths R1 to R3 connected to each connection terminal T, thereby making a call between the pair of connection terminals T and the communication section and the power supply section 8a. Connect the road and the power supply path. Further, the surplus terminal connection circuit 6 is connected or disconnected simultaneously to two predetermined communication paths R2 and R3 among the three communication paths R1 to R3, so that the connection between the two pairs of connection terminals T and the communication unit 10 is established. Then, the communication paths R2 and R3 are connected or disconnected. In the surplus terminal connection circuit 6, since the DC voltage component of the power feeding path is removed by providing the capacitor 6a, power is not supplied from the surplus terminal connection circuit 6 to the slave unit B.

  The operation of this intercom system will be described below. First, a call between the slave unit B and the master unit A will be described. When a visitor presses the call button B2 of any one of the slave units B, the switching circuit 5 receives a control signal from the control unit 9 and the switching circuit 5 communicates with the connection terminal T to which the slave unit B that is the call destination is connected. The power supply path is connected, and the surplus terminal connection circuit 6 is cut off. Therefore, the slave unit B that has been pressed receives power from the master unit A and can talk to the master unit A, and the camera B1 of the slave unit B starts imaging, The video can be displayed on the monitor 1 of the parent device A.

  Next, a call between the sensor camera C and the parent device A will be described. When a person passes in front of one of the sensor cameras C, the sensor camera C detects the human body with the human sensor C2, turns on the lighting fixture C3, and transmits a control signal having its own ID to the main unit A. To do. Upon receiving this control signal, the control unit 9 of the base unit A displays on the monitor 1 that a human body has been detected, and at the same time, sounds a notification sound through the speaker to notify the householder. The householder who receives the notification operates the operation unit 2 to display the image captured by the sensor camera C on the monitor 1. Here, the householder who has seen the video on the monitor 1 can make a call with the sensor camera C, for example, when he / she wants to talk to another captured householder or to warn the captured intruder. is there.

  In this case, in response to the control signal from the control unit 9, the extra terminal connection circuit 6 enters a connection state, connects two predetermined speech paths R2 and R3, and the switching circuit 5 connects the remaining one speech path R1. Thus, the communication paths R1 to R3 are formed with all the connection terminals T. At the same time, the power supply from the power supply unit 8a is stopped, and a control signal having the same ID as the ID received from the sensor camera C is returned to the devices connected to all the connection terminals T. The sensor camera C and the slave unit B that have received the control signal from the master unit A accept the control signal and operate the microphone only when the ID of the control signal is the same as their own ID. That is, only the sensor camera C that has detected the human body receives the control signal from the parent device A and operates the microphone, so that the parent device A can talk only to the sensor camera C.

  Here, since the video captured by a plurality of cameras can be divided and displayed up to 4ch simultaneously on the monitor 1 of the main unit A, notification of human body detection is possible even during a call with the sub unit B or the sensor camera C. In response, the image of the other sensor camera C can be displayed together with the image during the call. However, since audio can be received only from one microphone at a time, even if a plurality of images are displayed, only the selected slave unit B or sensor camera C is in a call. .

  Therefore, since this intercom system is configured to connect the communication paths R1 to R3 to all the connection terminals T by the switching circuit 5 and the extra terminal connection circuit 6, the base unit A is connected to which connection terminal T. Even without knowing which sensor camera C is connected, a call with a specific sensor camera C is possible. In addition, since the power feeding path and the communication path are connected to the one connection terminal T by the switching circuit 5, it is possible to make a reliable call between the slave unit B and the master unit A. Become. From the above, the work of registering the ID of the sensor camera C set individually in the master unit A is not required, and the interphone system is reduced in the load during construction.

  In addition, since the operation of registering the ID of the sensor camera C in the master unit A is not necessary, troubles caused by registering the ID incorrectly can be avoided, and when the sensor camera C detects a human body, The device A is notified to the householder, and video and audio can be transmitted between the sensor camera C and the parent device A.

  FIG. 3 shows a block diagram of a base unit A which is a second embodiment different from the above embodiment. Here, only matters different from those in the first embodiment will be described, and other matters (configuration, operational effects, and the like) are the same as those in the first embodiment, and the description thereof will be omitted. Also, FIG. 3 shows only the parts different from FIG. 1, and other configurations are the same as those in FIG.

  In this case, the surplus terminal connection circuit 6 can simultaneously connect or disconnect the communication paths R1 to R3 with all the connection terminals T, and the communication between the sensor camera C and the parent device A has this configuration. It is possible. That is, the surplus terminal connection circuit 6 connects all the three communication paths R1 to R3 at the same time, and the switching circuit 5 is in a disconnected state in which it is not connected to any connection terminal T. A communication path is connected between the sensor camera C and the parent device A, and a call can be made. In this case, since the switching circuit 5 that can form the power supply path is in a disconnected state, control for stopping the power supply of the power supply unit 8a is not necessary even when talking with the sensor camera C.

The block diagram which shows the intercom system which is 1st embodiment of this invention. The block diagram which shows the same intercom system. The block diagram which shows a part of intercom system which is 2nd embodiment of this invention. The block diagram which shows the intercom system which is a prior art example. The block diagram which shows the main | base station of the intercom system which is a prior art example.

Explanation of symbols

A Master unit B Slave unit C Sensor camera T Connection terminal R1 Call path R2 Call path R3 Call path

Claims (3)

A plurality of connection terminals to which a power supply means for supplying power to the slave unit, a plurality of slave units that operate by receiving power supply from the power supply unit, and a plurality of external devices that have their own ID and independently acquire power and operate In the main unit equipped with
A switching means for connecting a power feeding path and a speech path with one connection terminal, and an all-terminal connection means for connecting and disconnecting a speech path with all connection terminals. When talking to a slave unit, the call path of all the terminal connection means is disconnected, and the switching means secures the talk path with the slave unit by switching the connection to the connection terminal to which the slave unit is connected. When the control signal having the ID unique to the external device is received from the external device, the terminal connection means is connected to the communication path by transmitting the control signal having the received ID. The master unit that can communicate with one external device having the ID . An interphone system comprising: the master unit according to claim 1; a slave unit that operates by receiving power from the master unit; and an external device that has a unique ID and operates by acquiring power independently. The external device is a sensor camera including an imaging unit, a human body detecting unit, and a calling unit. When the sensor camera detects a human body, the sensor device transmits a control signal having its own ID to the base unit. When the control signal is received, the control signal having the received ID is transmitted by connecting the communication path to all the terminal connection means, and the sensor camera has the ID of the control signal transmitted from the master unit. 3. The intercom system according to claim 2 , wherein when the mobile phone is identical to its own ID, the call unit is operated so that the master unit can make a call with a sensor camera that detects a human body.

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