JPS62163486A - Guest receiving system - Google Patents

Abstract

PURPOSE:To obtain a guest receiving system which can reduce the system cost by applying a broadcast receiving television to a monitor television for monitoring the front door. CONSTITUTION:A guest is checked by a monitor image which is displayed automatically on a monitor television 4 at the time of call from a doorphone 1. When it is decided that it is unnecessary to answer it, unless the handset of an interphone 3 is not picked up, the power source of a television camera 2 and the monitor television 4 is turned off automatically after a prescribed time set in advance. On the other hand, when an answer to the guest is executed by picking up the handset, the power source of the television camera 2 and the monitor television 4 is turned off automatically, when its response is ended and the handset is reset, and the monitor state is released.

Description

[Detailed Description of the Invention] [Technical Field] The present invention provides a visitor reception system in which the situation at the entrance can be monitored with a television camera when a call is made between the door phone at the entrance and the intercom inside the room. It is related to.

[Background technology 1 Conventionally, when a call is made to a visitor between the doorphone at the entrance and the intercom inside the room, the situation at the entrance can be monitored with a TV camera, and the monitor image is broadcast on a monitor TV. This type of visitor reception system that can also display images has a problem in that the system cost is high because a monitor television exclusively for monitoring is provided.

[Objective of the Invention 1 The present invention has been made in view of the above-mentioned points, and its purpose is to export televisions for broadcast reception with - and [゛0 To provide a visitor reception system that can reduce system costs.

[Disclosure of the Invention] (Embodiment 1) Fig. 1 shows an embodiment of the present invention, in which a doorbell 1 disposed at the entrance and a television camera 2 form an entrance 22)A, and the above-mentioned An intercom 3 for communicating with visitors to and from the door phone; a monitor television 4 for displaying monitor images captured by the television camera 2 or television broadcast images; Turn on the power to the camera 2 and monitor TV 4, and turn on the monitor TV 4 so that the monitor image is displayed.
A TV controller 5 that switches the signal input to the TV controller 5 forms an indoor station (B) so that a monitor image is automatically displayed when a visitor is received, and a monitor TV 4 receives TV broadcasts. Channel switching unit 4 for
8 and a volume control volume 4b for general broadcast reception. The television controller 5 also includes a call detection circuit 6 and a camera control section 7.
, a television control section 8, a signal switching section 9, and an RF converter 11 that converts a monitor video signal captured by a television camera into a television broadcast signal of a predetermined vacant channel (for example, channel 1, channel 2). The signal switching section 9 switches between the television broadcast signal received by the broadcast receiving antenna 12 and the television broadcast signal output from the RF converter 11. The television operating switch 10 is arranged on the curved panel of the indoor unit (B). It should be noted that when using an imaging device with low power consumption (CCD type, MO8 type imaging device) as the television camera 2, it goes without saying that power may be constantly supplied to the television camera 2. It may also be operated in conjunction with a monitor television.

FIG. 2 shows a specific circuit example of the television controller 5, in which a voltage level detection circuit 5a consisting of a comparator CPltCP2 (or) outputs a calling signal from the door phone 1 to the intercom based on the DC level of the input signal Vi. The state of the handset 3 is detected, and the input signal Vi is 0.
When the voltage falls below 25V and the core /< L/- data CP2 output goes to "H" level and an input signal from the 7-phone circuit is detected (when the rising edge of the comparator CP2 output is detected), the monitor control circuit Activate the timer circuit T of 5b, set the 7-lip 7o-tub FF, and connect the camera power control relay RY, and the video signal switching relay RY2.
The relay contacts rlfr2 and rlfr3 are switched so that the monitor image taken by the television camera 2 is displayed on the monitor television 4 by exciting the television power supply control relay RY and the television power supply control relay RY. On the other hand, when a time-up signal is output from the timer circuit T after a certain period of time ffl<for example, 30 seconds, or when the input signal Vi 1, 75 V
When the comparator cP1 output reaches the H'' level I and it is detected that the handset of the intercom 3 has been returned (up-down of the handset), the comparator CP opens.

When the fall of the output is detected), the 7-rip 70-tub circuit FF is reset by the reset signal generation signal, and each relay RY, RY2 . The excitation of RY is released and the display of the monitor image ends. Incidentally, the timer number vr is also reset by the above-mentioned reset signal.

In addition, the TV production circuit 5c that controls the monitor TV 4 with the TV operation switch 10 controls the monitor TV 4's 7 yen regardless of the call from the door phone 1. In this embodiment, when the monitor image at the entrance is displayed on the monitor TV 4, the TV can be turned on and off. Even if the operation switch 10 is operated, the monitor state does not change. The initial reset circuit 5d is a malfunction prevention circuit that resets each circuit when the power is turned on to prevent malfunctions when the power is turned on.

The operation of this embodiment will be explained below. Now, the input signal Vi input to the voltage level detection circuit 5a becomes 3.42V when the call switch of the door phone 1 is turned on, and the voltage level detection circuit 5a detects the call based on this voltage level. When a call from the intercom 1 is detected, the timer circuit T is operated for a preset period of time or until the handset of the intercom 3 that was picked up is returned. During this period, the signal switching unit 9 switches the input signal to the monitor television 4 to the RF converter 11 output, and the television control unit 8 sets the reception channel of the monitor television 4 to a predetermined vacant channel, and the television camera 2 captures an image. The image of the entrance that has been opened is displayed on the monitor TV 4 so that visitors can be checked. That is, when a call is made from the doorphone 1, the visitor is automatically checked by the monitor image displayed on the monitor TV 4, and if it is determined that there is no need to answer the visitor, the handset of the intercom 3 is not picked up. The TV camera 2 and the monitor TV 4 are automatically turned off after a preset period of time.On the other hand, if you pick up the handset and interact with a visitor, the handset will be turned off after the interaction is finished. When the television camera 2 and monitor television 4 are returned to their original positions, the power to the television camera 2 and the monitor television 4 are automatically turned off, and the monitor state is released. In this case, the power of the television camera 2 and the monitor television 4 are automatically turned on and off, and there is no need to operate the monitor control for monitoring the entrance, so the operator only needs to operate the intercom 3, and the operation is easy. Become. Furthermore, when the monitor TV 4 receives a TV broadcast and displays the TV broadcast image, when a call from the doorbell 1 is detected, a signal is immediately input to the monitor TV 4 via switch 46 g9. is switched from the output of the broadcast receiving antenna 12 to the output of the RF frequency converter 11 to display a monitor image, and when the monitor state ends, the original television broadcast image display is restored. However, in the embodiment, even if the TV operation switch 10 is pressed #JIj in the monitor state where the monitor image is displayed, the monitor display state does not change, and the monitor display state cannot be forcibly reset. , it goes without saying that forced reset may be possible.

[Effect of the invention 1] As mentioned above, the present invention has an audio phone installed at the entrance;
An intercom which forms an entrance unit with the television camera and communicates with visitors between the doorphone and the television camera, a monitor television which displays a monitor image captured by the television camera or a television broadcast image, and a call signal of the doorphone. In a visitor reception system that forms an indoor unit with a television controller equipped with a signal switching unit that detects and switches the input signal to the monitor television so that the monitor image is displayed, the monitor television receives television broadcasting. The TV broadcast received by the broadcast receiving antenna is equipped with an RF converter that converts the monitor video signal captured by the TV camera into a TV broadcast signal of an empty channel on the broadcast receiving TV. (Ft.
This system uses a signal switching section to switch between the TV broadcast signal output from the RF converter and the TV broadcast signal output from the RF converter, allowing the commonly used broadcast reception TV to be used as a monitor TV for entrance monitoring. There is no need to prepare a dedicated monitor television, which has the effect of reducing system costs.

[Brief explanation of drawings]

FIG. 1 is a block circuit diagram of an embodiment of the present invention, and FIG. 2 is a specific circuit diagram of the same essential parts. 1 is a doorbell, 2 is a TV camera, 3 is an intercom,
4 is a monitor television, 5 is a television controller, 9 is a signal switching section, 11 is an RF converter, and 12 is a broadcast receiving antenna.

Claims (1)

[Claims] (1) A door phone installed at the entrance and a television camera form an entrance unit, and an intercom that communicates with visitors through the door phone, and a monitor image or television broadcast image captured by the television camera. In a visitor reception system in which an indoor unit is formed by a television monitor that displays a video and a television controller equipped with a signal switching section that detects a ringing signal from a doorbell and switches the input signal to the television monitor so that the monitor image is displayed. , the monitor TV is formed by a broadcast receiving TV that receives TV broadcasts, and an RF converter is installed to convert the monitor video signal captured by the TV camera into a TV broadcast signal of a predetermined vacant channel, and the broadcast receiving antenna is installed. A visitor reception system characterized in that a signal switching section switches between a television broadcast signal received by the RF converter and a television broadcast signal output from an RF converter.