JP4240082B2 - Intercom system - Google Patents

Description

  The present invention relates to an intercom system.

  Conventionally, a camera is built in a doorphone unit installed outside the dwelling unit (outer entrance), and the interphone master unit installed inside the dwelling unit displays the image captured by the camera of the doorphone unit as a liquid crystal display. There is provided an intercom system capable of making a call with a door phone slave unit while displaying on the device (see, for example, Patent Document 1).

In addition, it has a human sensor that detects the presence of a person in the monitoring area, and includes a plurality of camera sub-units that transmit an image of the monitoring area to the interphone master unit when the human sensor detects the presence of a person. An interphone system is also provided in which an image captured by a camera unit is displayed on a display unit of an interphone master unit (see, for example, Patent Document 2).
JP-A-6-113306 JP 2004-135199 A

  By the way, in the latter conventional example, when an image is transmitted from a camera unit in which the presence of a person is detected by a human sensor while displaying an image of the door phone unit, the interphone base unit has a door phone unit. At the same time as the image of the camera unit, the image of the camera unit is displayed on the display unit, and when multiple camera units are installed, the image of the camera unit transmitted later is displayed with priority. It was. However, a specific one of the plurality of camera slave units includes the outside entrance where the door phone slave unit is installed in the monitoring area, and the video of the door phone slave unit is displayed on the display of the interphone master unit. When the video of another camera slave unit is received by the interphone master unit while the video of a specific camera slave unit is displayed at the same time, even if the video of the other camera slave unit is displayed on the display unit once Since the person (visitor) who is at the outside entrance of the camera is detected by the motion sensor and switched to the image of the specific camera subunit, there is a problem that it is very unusable.

  The present invention has been made in view of the above circumstances, and an object thereof is to provide an intercom system with improved usability for video display.

In order to achieve the above-mentioned object, the invention of claim 1 is installed in an outside entrance of a dwelling unit, which is installed in a dwelling unit and a door phone sub-unit that transmits a video image and a sound signal of a visitor via a signal line. Interphone master unit that receives and transmits audio signals via the signal line to and from the door phone slave unit, and a plurality of camera slave units that transmit the video image of the monitoring area to the interphone master unit via the signal line An interphone system that displays images received from a doorphone slave unit and a camera slave unit on an interphone master unit. An audio signal transmission means for outputting an audio signal transmitted via a signal line to a speaker; an imaging means for imaging a visitor; and an imaging means Video signal transmission means for transmitting a video signal to be transmitted to the interphone master unit via a signal line, and the camera slave unit is a human body detection means for detecting the presence of a person in the monitoring area, and an imaging for imaging the monitoring area Means, and a video signal transmission means for transmitting a video signal output from the imaging means to the interphone main unit via a signal line, and when the human body detecting means detects the presence of a person, the imaging means causes the monitoring area to be imaged. The interphone base unit includes a microphone and a speaker, and an audio signal transmission unit that transmits an audio signal output from the microphone to the signal line and outputs an audio signal transmitted through the signal line to the speaker. Display means for displaying video, video signal received via signal line and signal processing from the door phone slave unit and video signal transmitted from the camera slave unit And a video control means for displaying an image in a separate or simultaneous display means, specific Kamerako of the plurality of cameras slave unit
The equipment is installed in a place that includes the outside entrance where the doorphone unit is installed in the monitoring area.
Other camera sub-devices other than the camera sub-unit monitor the outside entrance where the doorphone sub-unit is installed
Is located at a free, image control means interphone parent device, the while displaying simultaneously on the display means the video transmitted from the video and the intercom slave unit transmitted from the particular camera slave unit When a video signal transmitted from another camera unit is received, an image transmitted from the other camera unit instead of an image transmitted from the specific camera unit is transmitted from the doorphone unit. Simultaneously, it is displayed on the display means, and the video transmitted from the specific camera slave unit is not displayed on the display means while the video transmitted from the other camera slave unit is being received.

According to a second aspect of the present invention, in the first aspect of the invention, the video control means of the interphone master unit displays the video transmitted from the camera slave unit and the video transmitted from the door phone slave unit simultaneously on the display unit. characterized by relatively wide display area of the image to be transmitted from the intercom slave unit
And

According to the first aspect of the present invention, the specific camera sub-unit among the plurality of camera sub-units is the door phone sub-unit.
Other than the specific camera unit installed in a place that includes the outside entrance where the unit is installed in the monitoring area
Other camera units are located outside the surveillance area where the doorphone unit is installed.
Is installed, the other Kamerako unit when the image control means of the intercom master unit is displaying simultaneously on the display means the video transmitted from the video and the intercom slave unit transmitted from the particular camera slave unit When the video signal transmitted from the specific camera slave unit is received, the video transmitted from the other camera slave unit is displayed on the display means simultaneously with the video transmitted from the door phone slave unit. While displaying the video transmitted from the other camera slave unit, the video transmitted from the specific camera slave unit is not displayed on the display means.
When the interphone master unit receives the video from another camera slave unit while displaying the video of the doorphone slave unit and the video of the specific camera slave unit simultaneously on the display means of the interphone master unit, After displaying the image of the child unit on the display unit, even if the human body detecting unit detects the presence of a person and transmits the image with a specific camera unit, the image displayed on the display unit is not There is no switching from the image of the child device to the image of the specific camera child device, and as a result, the usability of the image display is improved as compared with the conventional example.

  According to the invention of claim 2, when the video control means of the intercom master unit displays the video transmitted from the camera slave unit and the video transmitted from the door phone slave unit simultaneously on the display unit, it is transmitted from the door phone slave unit. Since the display area of the displayed video is relatively wide, it can be judged at a glance which of the images displayed at the same time is the image from the door phone slave unit, which may hinder the reception of visitors. Absent.

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

  As shown in FIG. 1, the intercom system according to the present embodiment includes a doorphone child unit 2 installed outside a dwelling unit (for example, an outside entrance) and transmitting a video image and a voice signal of a visitor via a signal line Ls, and a dwelling unit. An interphone master unit (hereinafter abbreviated as “master unit”) 1 that transmits and receives audio signals to / from the door phone slave unit 2 via the signal line Ls, and a video signal that captures an image of the monitoring area. It is composed of a plurality (two in the illustrated example) of camera slave units 3A and 3B that transmit to the base unit 1 via Ls.

  The intercom unit 2 has a microphone 20a and a speaker 20b, an audio processing unit 21 for processing an audio signal for a loud call with the main unit 1, an individual imaging element such as a CCD or CMOS, and an optical system such as a lens. A camera unit 22, a modulation unit 23 that frequency-modulates a video signal output from the camera unit 22, and a two-wire / four-wire conversion circuit, and an audio signal output from the microphone 20 a and processed by the audio processing unit 21 The video signal frequency-modulated by the unit 23 (hereinafter referred to as “FM video signal”) is frequency-multiplexed and transmitted to the parent device 1 via the signal line Ls, and at the same time, the parent device 1 via the signal line Ls. Demultiplexing unit 24 that separates the audio signal transmitted from the terminal, operation input receiving unit 25 that receives an operation input of a call button (not shown) by a visitor, and operation of the call button by the operation input receiving unit 25 A call signal transmission unit 26 that transmits a call signal to the base unit 1 via the signal line Ls when the power is received, and the voice processing unit 21 and the demultiplexing unit 24 are the voice signal transmission means and the modulation unit 23. The demultiplexing unit 24 corresponds to a video signal transmission unit. In addition, the operation power supply of each part of the door phone sub unit 2 is supplied from the main unit 1 through the signal line Ls, and the call signal transmission unit 26 changes the line voltage of the signal line Ls. The ringing signal is being transmitted.

  The camera sub-units 3A and 3B have the same configuration, and include a human body detection unit 30 that detects the presence of a person in the monitoring region, and a camera unit that includes an individual image pickup device such as a CCD or CMOS, and an optical system such as a lens. 31, a modulation unit 32 that frequency-modulates the video signal output from the camera unit 31, and a control unit 33 that controls the operation of the camera unit 31 and the modulation unit 32 according to the detection result of the human body detection unit 30. . The human body detection unit 30 detects the presence of a person in the monitoring region by detecting a heat ray emitted from the human body with a pyroelectric element, and outputs a human body detection signal when the presence of the person is detected. The control unit 33 includes a microcomputer as a main component, and activates the camera unit 31 and the modulation unit 32 when a human body detection signal is output from the human body detection unit 30, and modulates the video of the monitoring area captured by the camera unit 31. The frequency is modulated at 32 and transmitted to the base unit 1 via the signal line Ls. In the present embodiment, the modulation unit 32 corresponds to a video signal transmission unit in the camera slave units 3A and 3B. Further, the operating power supply of each part of the camera slave units 3A and 3B is created from a commercial power supply by a power supply circuit (not shown).

  Base unit 1 includes a microphone 10a and speaker 10b, a voice processing unit 11 that processes a voice signal for loudspeaking communication with door phone slave unit 2, and a two-wire / four-wire conversion circuit, and is output from microphone 10a. The audio signal processed by the audio processing unit 11 is transmitted to the intercom unit 2 via the signal line Ls, and the audio signal and the FM video signal multiplexed from the intercom unit 2 are separated via the signal line Ls. In addition, a demultiplexing unit 12 that separates FM video signals transmitted from the camera slave units 3A and 3B, a monitor unit 13 having a display device such as a liquid crystal display, and an FM video signal separated by the demultiplexing unit 12 are demodulated. In addition, a video processing unit 14 that processes the demodulated video signal and displays it on the monitor unit 13, and a call transmitted from the intercom 2 through the signal line Ls. A call signal receiving unit 15 for receiving a signal, and a control unit 16 for controlling the operation of each unit to the microcomputer as a main component. In this embodiment, the audio processing unit 11 and the demultiplexing unit 12 correspond to audio signal transmission means, the monitor unit 13 corresponds to display means, and the video processing unit 14 and control unit 16 correspond to video control means.

  By the way, in this embodiment, since the doorphone slave unit 2 and the plurality of camera slave units 3A and 3B are commonly connected to the demultiplexing unit 12 of the master unit 1, collision of video signals transmitted from the respective slave units is detected. In order to avoid this, the time division multiplex transmission system is adopted. That is, each handset (doorphone handset 2 and camera handset 3A, 3B) is individually assigned to a plurality of time slots defined by a control signal (synchronization signal) transmitted from the base unit 1 via the signal line Ls, Each slave unit transmits a video signal in the time slot assigned to itself, and the original video is reconstructed from the video signal received and demodulated in each time slot in the video processing unit 14 of the master unit 1 and monitored. This is displayed on the part 13. The video processing unit 14 also performs a process of reducing the reconstructed video and simultaneously displaying a plurality of videos in a divided manner. However, the details of the time division multiplex transmission are well known in the art and will not be described.

  Here, one camera handset 3A is installed so that the outside entrance where the doorphone handset 2 is installed is included in the monitoring area, and the other camera handset 3B is installed so as not to include the outside entrance in the monitoring area. In the control unit 16, the operation of the present embodiment will be described on the assumption that the camera unit 3A including the outside entrance in the monitoring area is stored in a memory (not shown) as a specific camera unit.

  First, when a visitor moving toward the outside entrance is detected by the human body detection unit 30 of the camera sub unit 3A, the control unit 33 of the camera sub unit 3A activates the camera unit 31 and the modulation unit 32 to display an image of the monitoring area ( FM video signal) is stored in the time slot assigned to the own device and transmitted to the main unit 1. In the master unit 1, the FM video signal transmitted from the camera slave unit 3A is received and demodulated by the video processing unit 14, and a video in which the monitoring area of the camera slave unit 3A is captured is reconstructed and displayed on the monitor unit 13. To do. At this time, the control unit 16 can identify the slave unit (in this case, the camera slave unit 3A) that is the transmission source of the video signal, based on the time slot in which the video processing unit 14 receives the video signal.

  When a visitor who has reached the outside entrance presses the call button of the door phone slave unit 2, the operation input receiving unit 25 receives the operation input, and the call signal transmitting unit 26 sends a call signal to the base unit 1 via the signal line Ls. Send. In the base unit 1, when the call signal is received by the call signal receiving unit 15, the control unit 16 is necessary for operating the audio processing unit 21, the camera unit 22, and the modulation unit 23 to the door phone slave unit 2 through the signal line Ls. An operating power is supplied and the voice processing unit 11 is controlled to ring a ringing tone from the speaker 10b. The door phone sub unit 2 receives power from the main unit 1 and activates the camera unit 22 and the modulation unit 23 to store the visitor's video (FM video signal) in the time slot assigned to the unit. Send to base unit 1.

  In the main unit 1, the FM video signal transmitted from the doorphone sub unit 2 is received and demodulated by the video processing unit 14, and the video of the door phone sub unit 2 is reconstructed and monitored simultaneously with the video from the camera sub unit 3A. Display on the unit 13. At this time, as shown in FIG. 2A, the video processing unit 14 captures the video of the doorphone slave unit 2 (the visitor H1 from the front) in a relatively wide display area (hereinafter referred to as “parent screen”) W1. Video) and a reduced video of the camera slave unit 3A (for example, video taken from the rear of the visitor H1) is displayed in a relatively narrow display area (hereinafter referred to as “child screen”) W2. . When a householder who hears the ringing tone operates a response button (not shown), the control unit 16 that has received the operation input activates the voice processing unit 11 and can communicate with the intercom unit 2. And

  Furthermore, when the presence of a person (suspicious person H2) is detected by the human body detection unit 30 of another camera sub unit 3B during a call between the base unit 1 and the door phone sub unit 2, the control unit 33 of the camera sub unit 3B detects the presence of the camera unit. 31 and the modulation unit 32 are activated, and the video (FM video signal) in the monitoring area is stored in the time slot assigned to the own device and transmitted to the parent device 1. In the base unit 1, the FM video signal transmitted from the camera slave unit 3B is received and demodulated by the video processing unit 14, and a video in which the monitoring area of the camera slave unit 3B is captured is reconstructed, and FIG. As shown in FIG. 4B, the image is displayed on the child screen W2 of the monitor unit 13 in place of the image of the door phone child device 2. Here, while the video (FM video signal) is being transmitted from the door phone slave unit 2, the control unit 16 does not display the monitor unit 13 even if it receives the video transmitted from the camera slave unit 3 </ b> A. That is, during a call with the intercom unit 2, the person detected by the human body detection unit 30 of the camera sub unit 3 </ b> A including the installation location of the intercom unit 2 in the monitoring area is very likely to be a visitor H <b> 1. Rather than displaying the video of the same person (visitor H1) on the monitor unit 13 at the same time, the video of another person (suspicious person H2) detected and imaged by the other camera slave unit 3B is displayed on the monitor unit 13 of the base unit 1. It is easier to use.

  When a visitor is not detected by the human body detection unit 30 of the camera sub unit 3A, a signal line is connected from the control unit 16 of the main unit 1 that has received a call signal from the door phone sub unit 2 to the control unit 33 of the camera sub unit 3A. A command is given via Ls, and the video (FM video signal) captured by the camera unit 31 is transmitted to the main unit 1, and the video from the intercom unit 2 is displayed on the main screen W1 and the video from the camera unit 3A. May be displayed on the sub-screen W2.

  Further, in the present embodiment, when the image of the doorphone slave unit 2 and the image of the camera slave unit 3A or 3B are simultaneously displayed on the monitor unit 13 of the base unit 1, the image of the doorphone slave unit 2 is relatively wide in display area. Since it is displayed on the main screen W1, it is possible to determine at a glance which of the images displayed at the same time is the image from the doorphone slave unit 2, and there is an advantage that it does not hinder the reception of visitors. .

It is a system configuration figure showing an embodiment of the present invention. (A), (b) is explanatory drawing of the screen display of the intercom main unit in the same as the above.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Intercom main unit 2 Door phone sub unit 3A, 3B Camera sub unit Ls Signal line 11 Audio processing unit 12 Demultiplexing unit 13 Monitor unit 14 Video processing unit 16 Control unit 21 Audio processing unit 22 Camera unit 23 Modulating unit 24 Demultiplexing unit 30 Human body detection unit 31 Camera unit 32 Modulation unit 33 Control unit

Claims (2)

An audio signal that is installed at the outside entrance outside the dwelling unit and that captures images of visitors and audio signals via the signal line, and an audio signal that is installed inside the dwelling unit via the signal line. Intercom master unit that receives and receives video and a plurality of camera slave units that transmit video images of the surveillance area to the interphone master unit via signal lines, and receives images from door phone slave units and camera slave units In the intercom system that displays
The door phone slave unit picks up a microphone and a speaker, an audio signal transmission means for transmitting an audio signal output from the microphone to a signal line and outputting an audio signal transmitted through the signal line to the speaker, and images a visitor An image pickup means, and a video signal transmission means for transmitting a video signal output from the image pickup means to the interphone main unit via a signal line;
The camera unit includes a human body detection unit that detects the presence of a person in the monitoring area, an imaging unit that images the monitoring area, and a video signal that transmits a video signal output from the imaging unit to the interphone master unit via a signal line. A transmission means, and a control means for causing the imaging means to image the monitoring area when the presence of a person is detected by the human body detection means,
The interphone master unit includes a microphone and a speaker, audio signal transmission means for transmitting an audio signal output from the microphone to the signal line and outputting an audio signal transmitted via the signal line to the speaker, and display for displaying an image. And video control means for processing the video signal received via the signal line to display the video transmitted from the doorphone slave unit and the video transmitted from the camera slave unit individually or simultaneously on the display unit ,
A specific camera sub-unit of the plurality of sub-units is an entrance to the door phone sub-unit.
Is installed in a place that includes the surveillance area, and other camera units other than the specific camera unit are doors.
It is installed in a place that does not include the outside entrance where the phone is installed.
Video control means for intercom master unit is transmitted from the other camera slave unit when displaying simultaneously on the display means the video transmitted from the video and the intercom slave unit transmitted from the particular camera slave unit When the received video signal is received, the video transmitted from the other camera slave unit is displayed on the display means simultaneously with the video transmitted from the door phone slave unit in place of the video transmitted from the specific camera slave unit. The intercom system is characterized in that the video transmitted from the specific camera slave unit is not displayed on the display means while the video transmitted from the other camera slave unit is being received. The video control means of the intercom master unit relatively displays the display area of the video transmitted from the door phone slave unit when the video transmitted from the camera slave unit and the video transmitted from the door phone slave unit are simultaneously displayed on the display unit. 2. The intercom system according to claim 1, wherein the intercom system is widened.

Images