JPH0336096B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a security device installed in housing complexes, such as condominiums and company dormitories.

Conventional security devices, such as the device shown in Japanese Patent Application Laid-Open No. 56-42479, place a television camera and electric lock near the entrance, and check the appearance of visitors using monitor TVs installed in each dwelling unit. The electric lock is opened and visitors are allowed to pass through the front door.

However, there is a problem in that a large number of wiring lines are required from each dwelling unit to the entrance for controlling electric locks and transmitting television signals.

The present invention has been made to solve the above problems. Then, entrance facility A, manager facility B, and multiple dwelling units D ₁ ,
_. A modulation circuit 4 modulates the address signal generated by the encoder with a carrier wave of a first frequency _f1 and sends it to the transmission line C as a signal for calling a dwelling unit, and modulates the video signal from the television camera 8 with a carrier wave of a first frequency f1. A modulation circuit 9 modulates with a carrier wave of _f2 and sends it as a monitor signal to the transmission line C, and an electric lock 10 when a digital code for unlocking is input.
The decoder 12 that outputs an output for unlocking is provided with a demodulation circuit 13 that demodulates the unlocking signal of the third frequency _f3 from the transmission line C, extracts and outputs a digital code for unlocking. At the same time, the administrator facility B receives an unlocking signal by modulating the unlocking digital code output from the encoder 23 when the unlocking switch 21 is pressed with the carrier wave of the third frequency _f3. a modulation circuit 24 that outputs the address signal to the transmission line C, a demodulation circuit 17 that demodulates the residential unit calling signal of the first frequency f ₁ and outputs an address signal to the display section E, and a demodulation circuit _{17 that demodulates the residential unit calling signal of the first frequency f 1} and outputs the address signal to the display section E; The demodulation circuit 20 demodulates the monitor signal and outputs the video signal to the display section E, and each of the dwelling units D ₁ , ..., D _N is further provided with a drive circuit 26 via a switch circuit 26 . A demodulation circuit 31 that demodulates the monitor signal of the second frequency f ₂ from the transmission line C, extracts the video signal, and sends it to the monitor television 25. , when an address signal specifying the own dwelling unit is input, a signal for calling the dwelling unit at the first frequency f ₁ from the transmission line C is sent to the decoder 28 which outputs a control signal to close the switch to the switch circuit 26. By being equipped with a demodulation circuit 29 that demodulates and outputs an address signal, wiring work is easy even if the entrance facility and multiple residential units are to be provided with excellent functions such as monitoring or unlocking. The purpose is to provide a crime prevention device that can be used for security purposes.

The drawings showing the embodiments of the present application will be described below. The drawing assumes an apartment building, a multi-story company dormitory, a student dormitory, etc., and shows an example of a security device installed therein. A indicates the entrance facility, B
indicates the manager's facility, and D ₁ to D _N indicate the housing unit facilities of each resident. These facilities are interconnected by transmission lines C. A coaxial cable is usually used as the transmission line C, and signals from a television community reception device and signals from a communication facility (not shown) between the entrance, the housing unit management facility, and the housing unit are also superimposed on this cable. Additionally, a signal for calling the residence from the entrance, a signal for monitoring the face of the visitor, etc. are superimposed. Next, in each element provided in the entrance facility (also simply referred to as the entrance), 1 indicates a key section, which includes keys from 0 to 9, usually called a numeric keypad, and a call key. If you want to use this key to call room 123, for example, you can press buttons 1, 2, and 3 in order. Reference numeral 2 indicates a latch circuit for storing and holding the logic signal from the key section until it is reset, and for example, a logic ICM74LS175 manufactured by Mitsubishi Electric Corporation (hereinafter also simply referred to as manufactured by M) may be used. 3 indicates an encoder for converting the number specified for each dwelling unit into a digital code (address signal), which operates only when a control signal (for example, logic signal H) is applied to the control terminal 40; for example, M
It may also be configured using the ICM50115P for remote control manufactured by Manufacturer. Reference numeral 4 denotes a modulation circuit for FM modulating a carrier wave (frequency f ₁ =11MHz) using a digital code input, and is turned on when a signal H is applied to the control terminal 41. 5 is a branching circuit which is constructed by combining a bandpass filter. Next, 6 and 7 indicate timer circuits, and the former outputs a reset signal (for example, logic signal L) to the latch circuit 2 after a certain period of time (for example, 30 seconds) after a signal is input to the input terminal. The latter is configured to continuously output an operating control signal (logical signal H) for a fixed period of time (for example, 30 seconds) after the signal H is input to the input terminal. Next, 8 indicates a commonly known television camera for monitoring, and any camera such as an ITV camera may be used. Reference numeral 9 denotes a modulation circuit which amplitude modulates a video signal from a television camera, and uses a carrier wave frequency f ₂ =44.25MHz. Next, reference numeral 10 denotes an electric lock, which is installed on the entrance door of the entrance and can be locked or locked and unlocked. For example, it is preferable to use one that operates with AC10V. Reference numeral 11 denotes a timer circuit, which continues to send a control signal for unlocking the electric lock 10 for a certain period of time after a signal is input to its input terminal. Also, if necessary, a tape may be provided that can be linked to this, and the tape may be used to say "Please come in." Reference numeral 12 denotes a decoder, which outputs an output (for example, a logic signal H) when a digital code for unlocking is input from an input terminal, and an ICM50117P for remote control manufactured by M may be used. 13 indicates a demodulation circuit, which has a carrier wave center frequency f ₃ (=9MHz
It is recommended to use an FM demodulation circuit (e.g.). Next, in the administrator facility (also simply referred to as management) B, 14 denotes a display device, which displays the signals input to the key unit 1 using, for example, a 7-segment light emitting diode. 15, 16, and 17 are a sequential display circuit (a circuit that processes the digital code from the decoder and displays it on the display) and a decoder (for decoding the address signal into a room number code (for example, a decimal digital code) (for example, M
You may also use the ICM50117P for remote control made by
and a demodulation circuit (a circuit that extracts the address signal (digital code) of the called dwelling unit from the dwelling unit calling signal). 18 is a branching circuit combined with a bandpass filter. Next, 19 is a monitor television, which is usually an AV television or the like. Reference numeral 20 denotes a demodulation circuit, which extracts a video signal from a monitor signal (f ₂ =44.25MHz). Next, reference numeral 21 indicates an unlock switch, for example, a push button switch or the like is used, and when the switch is pressed, a signal of, for example, H is output.
22, 23, and 24 are a timer circuit (configured to send a drive signal H to the encoder for a certain period of time when a signal H is input to the input) and an encoder (which is configured to send a drive signal H to the encoder for a certain period of time when the input H is input) A circuit that continuously outputs a digital code, preferably using M's ICM50115P for remote control), and a modulation circuit (which frequency-modulates the output from the encoder using a carrier wave of frequency f ₃ (=9MHz, etc.). A circuit designed to output a signal for a lock is shown.

The electronic circuits in the entrance facility A and the electronic circuits installed in the administrator facility B are connected via transmission lines C, respectively, as shown in the figure.

Next, we will explain the electronic circuit system shown in the multiple housing units D ₁ , D ₂ , ...D _N , but since it is common to each housing unit except for a part, we will only explain the electronic circuit system for housing unit D ₁ and will not explain the other housing units. Omit duplicate explanations. 25
indicates a monitor television, and usually an AV television or the like is used. Reference numeral 26 indicates a switch circuit, which uses a relay switch, for example, to send a control signal (for example, H) to the control terminal 42.
It is configured so that it turns on when the level) is turned on. Reference numeral 27 indicates a power supply, which is for driving a monitor television, and may be an AC100V power supply. 28,2
9 and 30 are sequential decoders (which output a control signal (logical signal at H level) when a digital code specifying this dwelling unit is input.Of course, even if a code for another dwelling unit is input, the output will not occur). (For example, you can use M's remote control ICM50117P.)
Demodulation circuit (consists of FM demodulation circuit, frequency is
It is recommended to use 11MHz. This circuit is designed to take out a digital signal (address signal) for specifying a dwelling unit. ), and a branching circuit (consisting of a combination of a bandpass filter, which is configured to split the signal from connection part C into a signal for calling the dwelling unit and a signal for monitoring.)
and are shown respectively. Next, numeral 31 indicates a demodulation circuit, which extracts a video signal. Incidentally, in each residence, the code for the dwelling unit for calling must be different from each other, and only predetermined dwelling units can be called by the signal selectively inputted with the key section 1. must be maintained. In this point, the above decoder 28 in each dwelling unit
This is done by making the designated digital code different for each dwelling unit.

Next, the operation of the security device will be explained. First, it is assumed that a pre-scheduled visitor comes to the front door and calls a specific dwelling unit. In this case, from outside the entrance, the user presses the call numbers 1, 2, and 3, which are determined for the specific residential unit, on the key unit 1, for example, and CALL. As a result, for example, a logic signal H is output, and based on the functions of the timers 6 and 7 and the latch circuit 2, this signal passes through the encoder 3 and becomes an address signal.
The signal passes through the branching circuit 5 to the transmission line C, and a signal is output to each dwelling unit D. In each dwelling unit, the signal passes through a branching circuit 30 to a demodulation circuit 29 and a decoder 28. In the decoder 28, the signal also operates a switch circuit to operate the monitor television 25 in the corresponding dwelling unit. On the other hand, in other dwelling units, the decoder 28 does not output a signal for operating the switch, so the monitor television is not operated. Next, the person standing in front of the door key is imaged by a television camera, and the signal passes through the modulation circuit 9, reaches the branching circuit 5, and is sent to the management B and each residence via the transmission line C. Directed to D. In the corresponding dwelling unit, the signal passes through the branching circuit 30 and the demodulating circuit 31 and is displayed on the monitor TV, but in other dwelling units, the signal is not displayed on the monitor TV. On the other hand, in the management B, the information reaches a monitor television 19 through a branching circuit 18 and a demodulation circuit 20, allowing the manager to see the visitor. In addition, the signal from the above-mentioned key section is sent to a branching circuit 18, a demodulation circuit 17,
Display unit 1 via decoder 16 and display circuit 15
4, it is possible to know which dwelling unit the person at the door wants to enter. The administrator may contact the corresponding dwelling unit by telephone if necessary, or if the person is known to be visiting the dwelling unit in advance (for example, if the person is a resident of the dwelling unit or has been contacted in advance by the resident). (If you are a visitor who has been booked), operate the unlock switch 21 to unlock the electric lock 10 of the entrance door, and if necessary, use an interphone (not shown) to open the door. (Voice transmission is performed using transmission line C) and visitors are allowed to enter. After that, safety can be maintained again by operating the unlock switch in the reverse direction to lock the electric lock, or by setting the electric lock attached to the entrance door to an automatic lock type in advance.

Next, FIG. 2 shows a different example of the display section (the part surrounded by the symbol E) in the management B in FIG. 1, and the part surrounded by the symbol E' will be explained below. 35 is a decoder, which is a circuit that converts an address signal into a room number code. A microcomputer 36 generates a signal for generating a video signal. This device is TK manufactured by NEC Corporation.
-85 should be used. Reference numeral 37 indicates a video signal generation circuit, also called an NTSC encoder, which generates an NTSC standard signal for displaying the room number being called on the monitor TV, such as ``Genkan→〇〇〇Goushitsu''. Shows the circuit. Reference numeral 38 indicates a changeover switch, and a commonly known switch such as a push button switch is used. Normally, it is set to the A side, but it can be set to the B side when confirming the customer's destination. 39 indicates a monitor television, which is usually designed to monitor only the faces of people who come to the entrance. If you want to check the destination of a customer's call, you can monitor the residence number of the person you are calling. In this case, the changeover switch 38 is operated to display the information.

As described above, according to the present invention, a visitor stands at the entrance and inputs the room number he/she wants to go to via the key part, and the visitor stands at the entrance of the residence or facility of the manager with that room number. The images of the participants can be simultaneously displayed on each monitor TV. The front door can then be opened by the administrator confirming the intention of the resident of the room number and then operating the unlock switch.

Moreover, as mentioned above, the corresponding dwelling unit is selected from among the plurality of dwelling units based on the address signal for specifying the dwelling unit number at the entrance facility, and a television image is generated between that dwelling unit and the manager's facility. Even if the entrance facility can be unlocked using a digital code for unlocking, it may be possible for the entrance facility to be unlocked by using a digital code for unlocking, but the same applies to each of the facilities (multiple residential units, the entrance facility, and the manager's facility).
The advantage is that a single transmission line is sufficient to connect the two. This means that a low-cost security device with easy wiring work can be provided.

[Brief explanation of the drawing]

The drawings show an embodiment of the present application, and FIG. 1 shows a system diagram of the security device, and FIG. 2 shows a system diagram showing different display units. A...Entrance facility, B...Manager facility, C...Transmission line, D...Dwelling unit.

Claims (1)

[Claims] 1 Entrance facility A, manager facility B, and multiple residential units
D ₁ , ..., D _N are interconnected by a single transmission line C, and the entrance facility A has a key part 1.
Then, the address signal generated by the encoder based on the logical signal representing the specified dwelling unit number from the key part 1 is modulated with a carrier wave of the first frequency f ₁ and sent to the transmission line C as a signal for calling the dwelling unit. A modulation circuit 4 that transmits a video signal, a modulation circuit 9 that modulates a video signal from a television camera 8 with a carrier wave of a second frequency f ₂ and transmits it as a monitor signal to a transmission line C, and a digital code for unlocking. When input, the decoder 12 outputs an output to unlock the electric lock 10, demodulates the unlocking signal of the third frequency _f3 from the transmission line C, and extracts the unlocking digital code. In addition, the administrator facility B is provided with a demodulation circuit 13 for outputting a digital code for unlocking, which is output from the encoder 23 when the unlock switch 21 is pressed, at the third frequency _f3. A modulation circuit 24 that modulates with a carrier wave and outputs it as a lock unlocking signal to the transmission line C, and a demodulation circuit that demodulates the residential unit calling signal of the first frequency _f1 and outputs an address signal to the display section E. 17 and a demodulation circuit 20 that demodulates a monitor signal of a second frequency f ₂ and outputs a video signal to the display section E, and each of the dwelling units D ₁ , ..., D _N is provided with , switch circuit 2
A monitor television 25 connected to a driving power source 27 via a power source 27 is provided, and a monitor signal of a second frequency f ₂ from the transmission line C is demodulated to extract a video signal and sent to the monitor television 25. The demodulation circuit 31 to send out and the switch circuit 26 when an address signal specifying the own dwelling unit is input.
The decoder 28 that outputs a control signal for closing the switch is equipped with a demodulation circuit 29 that demodulates the residential unit calling signal of the first frequency _f1 from the transmission line C and outputs an address signal. Featured security device.