KR950014383B1 - Doorphone - Google Patents

Abstract

exterior unit having a common communication railroad; a transmitting/receiving unit for outputting an modulated call information to the common communication railroad, transmitting an image signal and a sound signal outputted from a TV camera and a sound signal transmitting/receiving unit in response to input of a transmission/reception control signal, and receiving the sound signal from the common communication railroad; a response signal detecting unit for detecting and outputting a call response signal inputted from the common communication railroad in response to the input of the detection control signal, the response signal detecting unit being connected to the transmitting/receiving unit; and a first controlling unit for generating a call address corresponding to a household selecting signal by an any visitor, providing the detection control signal to the detecting unit, outputting the transmission/reception control signal to the transmitting/receiving unit in response to the detected response detecting signal, and controlling sound, image, and data call. The apparatus also comprises an interior unit having a demodulating unit for demodulating a signal received from the common communication railroad; a displaying unit for displaying the image signal outputted from the demodulating unit in response to the input of a monitoring control signal; a second controlling unit for comparing the call address with an internal original address, outputting an alarm information when the call is own call information, and outputting the call response signal, the monitoring control signal, and the sound control signal when a handset information is received; an alarm unit for outputting an alarm signal outputted from the second controlling unit as an audio signal; and a response signal outputting unit for switching a ground level of a signal level of the common communication railroad.

Description

Multi-generation door phone for common entrance control

1 is a block diagram of a conventional video door phone,

2 is a schematic connection diagram of a video door phone according to the present invention;

3 is a detailed circuit diagram of the outdoor device shown in FIG.

FIG. 4 is a detailed circuit diagram of the indoor device shown in FIG.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-generation video door phone installed in a common house using multiple entrances, and in particular, a particular generation can be selected and transmitted to transmit and receive voice and image information by a door intercom installed in the front door. The present invention relates to a multi-generation door phone for common entrance control.

The common entrance video door phone refers to a visitor identification and door opening and closing device of a multi-family house (common house) using a common entrance by several households (furniture).

The video door phone is composed of an outdoor unit installed in the front door and an indoor unit installed in each of several generations using the front door jointly.

FIG. 1 is a block diagram of the video door phone of the bell tower, which detects the TV camera 1, the microphone 2, the TV modulation circuit 3, the mixer 4, the voice call circuit 5, the speaker 6 and the visitor. An outdoor unit 9 composed of a circuit 7 and an interface circuit (IFU) 8; A TV receiving block 16 composed of a TV 11, an interfacing circuit (IFU) 12, a mixer 13, a microphone 14, and an audio signal transmitting circuit 15; It consists of a data combiner 10 which combines the data between the outdoor unit 9 and the TV receiving block 16. The TV receiving block 16 of the video door phone configured as shown in FIG. 1 is an indoor unit installed in each household, and will be referred to hereinafter as the indoor unit 16. The configuration and operation of the video door phone having the configuration as shown in FIG. 1 are described in detail in US Pat. No. 4,959,713, but the operation thereof is briefly described as follows.

When the video signal is output from the TV camera 1 of FIG. 1, the video signal output from the TV camera 1 is input to the mixer circuit 4 as a modulated signal via the TV modulator 3. FIG. The mixer circuit 4 mixes the modulated TV video signal with the audio signal output from the audio circuit 5 and outputs it to the data combiner 10. The data combiner 10 transmits a signal of the outdoor unit 9 to a home bus 50. In addition, the visitor detection signal output from the visitor detection circuit 7 when the visitor makes a call Cal1 is passed through the interface circuit unit (hereinafter referred to as “IFU”) 8 and the data combiner 10. The visitor detection signal carried by the data combiner 10 is inputted to the IFU 12 in the indoor unit 16 to adjust the TV 11. The TV 11 is turned on by the control as described above, and at this time, the outdoor unit 9 is communicated with the voice signal transmission circuit 15.

In the first diagram, the IFU 8 of the outdoor unit 9 and the IFU 12 of the indoor unit 16 communicate data with a unique code. That is, the outdoor unit 9 is connected with a plurality of TVs 11 in a plurality of TV receiving blocks 16 connected through a plurality of data combiners 10 and a home bus 50, and in the TV receiving block. The TV 11 of 16 is configured to operate only on its own code.

Therefore, in the circuit shown in FIG. 1, the IFU 8 of the outdoor unit 9 adjusts several TVs 11. However, in the conventional circuit as described above, a data line capable of data communication with an input / output line of a circuit that mixes video and audio in order to operate a camera and a TV is separately configured on the home bus 50. When used, the number of wirings increases.

In addition, there is a problem in that a large number of data combiners are required to adjust data lines of a plurality of TV receiving blocks, thereby increasing the configuration.

Accordingly, an object of the present invention is to provide a common door control door phone capable of selectively transmitting / receiving voice, video, and data generated from the common door by connecting the common door and each generation of multiple households in parallel in parallel.

Another object of the present invention is to provide a door phone for common connection between the outdoor unit installed in the common entrance and the indoor unit installed in each household with two wires, and transmitting and receiving voice, video and door information with the indoor unit selected by the outdoor unit. have.

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

2 is a connection diagram of a video door phone according to the present invention, which includes a two-wire common communication line 62, a video camera and a voice signal transmission / reception unit, and recalls generation call signals corresponding to visitor calls. The two-wire common communication line 62 includes an outdoor unit 60 that transmits a common signal 62 and performs voice, video, and data communication with an indoor unit that responds to the generation call signal, and a TV and an audio signal transceiver. Are connected in parallel to each other and transmit a response signal to the common communication line 62 in response to an input of a generation call signal corresponding to its own unique address preset in an internal memory area. And a plurality of indoor units 64, 66 and 66 + N for transmitting and receiving data.

At this time, the common communication line 62 is one communication line of two lines, and one outdoor unit 60 and a plurality of indoor units 64 and 66 + N communicate in a 1: 1 manner. . Then, each of the plurality of indoor units 64 (66 + N) has a unique address assigned to each household, and the outdoor unit 60 has household call information according to the visitor's call information, for example, selected Unique addresses of the indoor units 64 to 66 + N installed in the household are generated.

When the call information of a specific generation is output from the outdoor unit 60 configured as shown in FIG. 2, it is output to the two-wire shared common line 62. One indoor unit having an address corresponding to the call information among the plurality of indoor units 64 to 66 + N inputting the call information through the two-wire common communication line 62 responds to each other in response thereto. Communication takes place.

3 is a detailed circuit diagram of the outdoor unit 60 shown in FIG. The configuration of the reference numeral 123 denotes a TV camera 100, an audio signal transmitter / receiver 102, a modulator circuit 110 for modulating and outputting an input signal, and a modulated signal output from the number circuit 110. The mixer 112 for mixing the outputs of the audio signal transmitter 102 and transmitting the signals to the communication line 62 and receiving the signals from the common wire line 62, the TV camera 100 and the modulation circuit 110. And a switching circuit l08 connected between the voice transmitter / receiver 102 and the mixer 112, respectively, and switched by an input / receive control signal SC2 to the input of the control signal SC2. In response, the signal transmission and reception unit transmits and receives an input signal and an audio and video signal to the communication line 62. Reference numeral 114 denotes a keyboard, which generates a selection signal for selecting a plurality of indoor units connected in parallel to the common communication line 62. Reference numeral 130 is connected to the mixer 112 inside the signal transmitter / receiver 123 and detects and responds to a response signal which is enforced on the common communication line 62 in response to the input of the detection control signal SC3. A response signal detection circuit outputs a detection signal. Reference numeral 136 is connected to the receiving output terminal of the mixer 112 in the signal transmitting and receiving unit 123, and decodes the received signal into a digital signal in response to an input of a data detection control signal SC4. Is a control signal detection circuit. Reference numeral 118 generates call address data corresponding to the generation selection signal further output from the keyboard 114 and simultaneously provides the detection control signal SC3 to the response signal detection circuit 130, and detects the detected response. The control unit outputs the transmission / reception control signal SC2 and the data detection control signal SC4 in response to the signal to control voice, video and data calls. Reference numeral 122 converts (codes) the call address data output from the controller 118 into an analog signal and outputs the analog signal to the modulation circuit 110 in response to an input of a switching control signal SC1. Call signal generation circuit.

In the configuration of FIG. 3, the response signal detection circuit 130 includes a reference voltage generator for generating a reference voltage by the divided voltages of the resistors R3 and R4, and the response detection control signal SC3 output from the controller 118. Comparing the switch 126 passing the output of the mixer 112 with the reference voltage and the output of the switch 126 by switching in response to an input of the output signal and outputting a response signal when the reference voltage is higher. Comparator 128 is configured.

The control signal detection circuit 136 switches in response to the input of the data detection control signal SC4 output from the controller 118 to switch the received signal of the mixer 112, and the switch. 132, and a tone receiver (Dual Tone Multi-freqency-Receiver) (hereinafter referred to as "DRAMFR.") 134 for decoding and outputting the tone signal input through the switch 132 as binary data. The call signal generating circuit 122 responds to the input of the tone generator DTMF-sender 120 for generating a tone signal corresponding to the address data added to the control unit 118, and the switch control signal SC1. And a switch 124 for inputting the generated tone signal to the modulation signal 110. The control unit 1 18 is a micro-controller having a data processing capacity of 8 bits (hereinafter referred to as "MCU"). Oscillator consisting of 116, capacitors C1 to C3, and crystal Y1 It is configured.

4 is a detailed view of the indoor units 64, 66, 66 + N shown in FIG. Reference numeral 114 in the indoor unit 64 denotes a demodulator for demodulating and outputting a signal which is modulated and received on the common communication line 62. Reference numeral 143 denotes a display unit which displays an image signal further output to the demodulation circuit 144 in response to the input of the monitoring control signal SC5. Reference numeral 152 denotes a call signal detection circuit for decoding call signals of the analog output from the demodulation circuit 144 and outputting call address data in response to an input of the call detection control signal SC6. Reference numeral 151 outputs the call detection signal SC6 in the initial state, and compares the call address data output from the call signal detection hero 152 with a preset unique address to display the read signal when it is its own call information. Output, hand The control unit MCU outputs a call response signal, the monitoring control signal SC5 and the voice control signal SC7 when the information is received, and outputs the door opening / closing information and the data control signal SC8 corresponding to the door packet information input. )to be. Reference numeral 153 denotes an address setting unit configured to include a resistive array RA and a plurality of dish SNAs to input the unique address according to the on / off of the switch SWA to the MCU 151. Reference numeral 154 denotes an alarm circuit that outputs an alarm signal output from the control unit 151 as an audible signal. Reference numeral 156 denotes a response signal output circuit which is switched to the response signal output from the controller 151 to switch the signal level of the common communication signal 62 to the ground level. 162 is an input of the voice control signal SC7. A voice signal transmission / reception unit connected to the common communication line 62 to transmit / receive a voice signal, and 170 generate a tone signal corresponding to the door opening / closing information output from the control unit 151, and the data control signal ( SC8) is a door control circuit for transmitting the generated door opening and closing information.

The fourth intermittent display unit 143 is connected between the monitor 142 for displaying an input video signal and the demodulator 144 and the monitor 142, and is inputted by the monitoring control signal SC5. It is composed of a switch 146 for connecting. The call signal detection circuit 152 is switched by an input of a call detection control signal SC6 and switches a switch 148 for outputting a call signal output from the demodulation circuit 144 and through the switch 148. And a DTMFR 150 that decodes the tone signal and outputs it as call address data. The response signal output circuit 156 is composed of a transistor Ql connected between the common communication line 62 and a branch and switched by input of a response signal. The voice signal transceiver 162 is connected between the voice signal transceiver 160 for transmitting and receiving voice signals, the common communication signal 62 and the voice signal transceiver 160, and is switched by the voice control signal. Consisting of a switch 158. The door control circuit 170 is switched in response to an input of a tone generator (DTMF-Sender) 166 generating a tone signal corresponding to the door opening information output from the control unit 151 and a data control signal SC8. And a switch 164 for outputting the generated tone signal to the line 62.

Hereinafter will be described in detail the configuration of the embodiment of Figures 3 and 4 configured in accordance with the present invention.

First, as shown in FIG. 3, the keyboard 114 installed in the outdoor unit 60 shown in FIG. 3 is arranged with up to 16 keys so that one of the 16 households can be selectively selected to make a call. When an external user, that is, a visitor, presses the number of the household to call using the keyboard 114 of FIG. 3, an address, which is key data for the number, is input to the MCU 116 shown in FIG. At this time, the MCU 113 inputs the digit of the address corresponding to the input key to the tone generator 120. The tone generator 120 generates a DTMF signal corresponding to the input digit. Initially, the switch 124 connected to the output terminal of the tone generator 120 is " on " and the remaining switches 104, 106, 126 and 132 are " off '. Accordingly, the DTMF signal output from the tone generator 120 is input to the modulation circuit 110 through the switch 124 which is initially turned "on" and is loaded on the common communication line 62 so that the indoor units 64 to 66 + N) side.

In the common communication line 62, the voltage Vcc flows on the communication line 62 by the mixer 112. Therefore, the DTMF signal modulated by the modulation circuit 110 is input to the demodulation circuit 144 of FIG. 4, and the output is demodulated to the original DTMF. At this time, only the switch 148 of the plurality of switches in the indoor unit 64 is "on" and the remaining switches are "off". The call signal of the DTMF demodulated by the demodulation circuit 144 When it is input to the DTMFR 150 through the switch 148, the DTMT signal input to the tone decoder 150 is decoded into data corresponding to the number and input to the MCU 151. The MCU 151 inputting the call address data output from the tone decoder 150 compares the input digit with the unique address input to the ports P0.0 to P0.3, and operates if it is not its own address. If not, the alarm circuit 154 is driven through the port P3.4.

According to the alarm, the user of one of the indoor units 64 to 66 + N, for example, the indoor unit 64 knows that he has been called, and the hand (Not shown), the switch SW11 is " on ". At this time, the MCU 151 handles the " on " switch by the switch SW11. Judges that the sound has been heard, and outputs a logic " high " to the output port P2.5. That is, a response signal for answering the call is generated for t hours. The transistor Q is turned on by the high response signal of the MCU 151. When the transistor Q1 is " turned on ", the voltage on the common communication line 62 is bypassed to ground to reach the ground level. The MCU 151 outputting the response signal outputs the call detection signal SC6, the voice control signal SC7, and the monitoring control signal SC5 to " low, high, high " to turn off the switch 148. Switch 158, 146 is " on "

Meanwhile, as described above, the MCU 116 of the outdoor unit 60 having generated the address digit corresponding to the call by pressing the keyboard 114 outputs the response detection control signal SC3 as "high" to switch 126. "On". Thus, the hand in the indoor unit 64 For example, when the communication line 62 drops to "low" as described above, the signal applied to the comparator 128 through the switch 126 becomes "low", so that the comparator 128 detects the MCU ( A response signal of a low signal to the port P2 5 of 116, that is, a hand The response signal is applied. At this time, the MCU 116 outputs a signal of "low" to the port P3.0 in response to this signal to "off" the switch 124 and to "high" to the ports P3.2, P3 3. The transmission / reception control signal SC2 and the data detection control signal SC4 are output to turn the switches 104, 106 and 132 on. Therefore, the transmission path of the DTMF signal is blocked by the above operation, and the video signal of the TV camera 100 is input to the modulation circuit 110. The voice signal output from the voice signal transceiver 102 is input to the mixer 112. At this time, the output of the modulation circuit 110 is input to the mixer 112, so that a signal mixed with the image of the visitor standing in the outdoor porch and the voice signal of the visitor is loaded on the common communication line 62.

At this time, the MCU (151) of the indoor unit which has "on" the transistor Q1 connected between the signal transmission line of the common communication line 62 and the ground momentarily "on" switched to the port (P3.1) for call detection control. The switch SC 148 is turned off by making the signal SC6 logic "low", and the monitoring control signal SC5 and the voice control signal of the logic "high" are output to the output ports P3.0 and (P3.2). SC7) outputs the switches 146 and 158 to " on " to create a circuit state that can communicate with the outdoor unit 60. The video signal that has passed through the demodulation circuit l44 by the above operation is transferred to the switch 146. An image is displayed on the monitor 142 via the voice signal, and the voice signal communicates with the voice signal transceiver 160 through the switch l58.

If the door lock is to be opened during the voice call as described above, it is executed by pressing the switch SW12 installed in the indoor unit 66. When the switch SW12 is pressed, the MCU 151 outputs a logic "high" data control signal SC8 to the port P3.3 in response to the input of the switching signal of the switch SW12 to switch. 164 is turned on and its address is applied to the DTMF generating circuit 166 so that the DTMF signal is loaded on the common line 62. The DTMF signal loaded on the common communication line 62 is input to the tone decoder 134 through the switch 132, the capacitor C4, the resistors R6, and R7 that are "on" in the outdoor unit 60. . In this case, the resistors R8 and R9 and the capacitor C5 are for reference. The tone decoder l34 converts the input DTMF into binary digital data and applies it to the input ports P2.0 to P2.4 of the MCU 11. The binary digital data output from the tone decoder 134 is door opening and closing information, and the MCU 116 inputting the door opening and closing information is a call address in which the input door opening and closing information is output by the visitor's key selection. If the two values match, the port P2.6 is made high, and the transistor Q2 is turned on through the resistor R10 to operate the door lock 31.

When the call between the indoor unit and the outdoor unit ends, the indoor unit becomes a hand. Put down. Hand as above When the switch SW11 is lowered, the switch SW11 is "off", and the MCU 151 outputs a "high" signal to the port P2.5 for a predetermined time. Therefore, the transistor Q is "turned on" for a predetermined time to make the common communication line 62 low. The MCU 151 which has controlled the transistor Q1 as described above generates the call detection control signal SC6. Outputs "high" to turn on the switch 148 to its initial state and to turn off the remaining switches 146, 148 and 164. The indoor unit 64 then returns to its initial state. The non-inverting terminal (+) of the comparator 128 of the unit 60 is supplied with a "low" signal to the comparator 128 via a switch 126. Therefore, the comparator 128 receives a "low" signal. Outputs to the port P2.5 of the MCU 116 of the outdoor unit At this time, if the "low" signal is input to the port (P2.5), MCU 116 is the indoor unit is handed Recognizes that it is set down and initializes all ports so that the switches 106, 104, 126, 132 are turned off and the switch 124 is turned on.

As described above, the present invention can accurately manage the common entrance of a multi-family house by controlling only one generation of the door called at the same time as one outdoor unit and a plurality of indoor units selectively communicate with each other as a common communication line of two wires. have.

Claims (7)

In a multi-generation door phone for common entrance control provided with a TV camera and a voice signal transmitting / receiving unit, a common communication line 62 and input call information are modulated and output to the common communication line 62 to transmit and receive a control signal SC2. Transmission and reception means for transmitting the video signal and the audio signal outputted from the TV camera and the audio signal transmission / reception unit to the communication line 62 in response to an input of the signal, and receiving the audio signal from the common communication line 62; Response signal detection means connected to the transmission / reception means for detecting and outputting a call response signal input to the common communication line 62 in response to the input of the detection control signal SC3, and corresponding to the generation selection signal by the visitor; And generating the call address to provide the detection control signal to the response signal detecting means and sending the detection control signal to the transmitting and receiving means in response to the detected response detecting signal. And outputting a new control signal and the outdoor unit are configured as a first control means for controlling the voice, video and data calls; Demodulation means for demodulating and outputting a signal received from the common communication line 62, a display portion for displaying a video signal output from the demodulation means in response to an input of a monitoring control signal, and a call address output from the demodulation means. And the alarm signal when the call information is owned by hand. Second control means for outputting a call response signal and the monitoring control signal and a voice control signal when information is received; an alarm means for outputting an alarm signal further output from the second control means as an audible signal; and the second control Response signal output means for switching on the signal level of the common communication line 62 to the immersion level by being switched to the response signal output from the means, and connected to the common communication line 62 by input of the voice control signal; Multi-generation door phone for common entrance control, characterized in that the indoor unit consisting of a voice signal transmission and reception means for transmitting and receiving voice signals. The communication line of claim 1, wherein the transmitting and receiving means mixes a modulation circuit 110 for modulating and outputting a pressure signal, a modulation signal output from the modulation circuit 110, and an output of the voice signal transmitting and receiving unit. And a mixer 112 for receiving a signal from the communication line 62, between the TV camera and the modulation circuit 110, and between the voice transmitter / receiver and the mixer 112, respectively. And a switching circuit 108 which is switched and connected by an input of a transmission / reception control signal outputted from the first control means, in response to the transmission / reception of the transmission / reception control signal, an input signal and an audio and video signal are transmitted to the common communication line ( 62) Multi-generation door phone for entrance control, characterized in that the transmission and reception. 2. The apparatus of claim 1, wherein the first control means comprises: selection signal generating means for generating a selection signal for selecting a plurality of indoor units connected in parallel to the common communication line 62, and output from the selection signal generating means; Simultaneously generating call address data corresponding to a generation selection signal, providing the detection control signal to the response signal detection means, and outputting the transmission / reception control signal to the transmission / reception means in response to the detected response detection signal. And a first control unit for controlling a data call and a call signal generation circuit for converting call address data output from the control unit into an analog signal and outputting the analog signal to the modulation means in response to an input of a switching control signal. Multi-generation door phone for common entrance control, characterized in that the configuration. 4. The call control apparatus according to claim 3, wherein the second control means comprises: call signal detection means for decoding call signals of an analog output from the demodulation means and outputting call address data in response to an input of a call detection control signal; Outputs the call detection signal to the call signal, and compares the call address data output from the call signal detection means with a preset unique address to output an alarm signal when the call information is its own; And a second control unit for outputting the monitoring control signal and the voice control signal. 5. The communication line according to claim 3 or 4, wherein the response signal output means is connected between the common communication line 62 and the ground and is switched by input of a response signal output from the second control means. A multi-generation door phone for common entrance control, characterized in that the switch bypasses the voltage level of 62 to ground. The method of claim 5, wherein the response signal detecting means comprises a reference voltage generator for generating a reference voltage of a predetermined level and response switching of the response detection control signal output from the first control means. Compared to the switch 126 for passing the output, the reference voltage and the output of the signal through the switch 126 and outputs a response signal to the first control means when the reference voltage is higher Multi-generation door phone for common entrance control. For common entrance control with a TV camera, a common communication line 62, a voice signal transmitting and receiving unit for transmitting and receiving a voice signal from the common communication line 62, and a door lock driven in response to an input of a door open / close signal. In the multi-generation door phone, the incoming call information is modulated and output to the common communication line 62, and the video signal output from the TV camera and the audio signal transmitting and receiving unit in response to the transmission and reception of the control signal SC2, Transmission and reception means for transmitting and receiving an audio signal to and from the common communication line 62, and a call response signal input to the common communication line 62 in response to an input of a detection control signal SC3. A response signal detection means for detecting and outputting a response detection signal and a reception output terminal of the transmission / reception means, and receiving the data in response to an input of a data detection control signal. A control signal detecting means for coding and outputting door information, a call address generated in the generation selection signal input by the visitor's selection, and simultaneously providing the detection control signal to the response signal detecting means, and detecting the detected response. In response to a detection signal, the transmission and reception control signal and the data detection control signal are output to the transmission and reception means and the control signal detection means, respectively, to control voice, video, and data communication, and the door in response to the signal output from the control signal detection means. An outdoor unit composed of first control means for outputting an open / close signal; Demodulation means for demodulating and outputting a signal modulated and received on the common communication line 62, a display unit for displaying an image signal output from the demodulation means in response to an input of a monitoring control signal, and outputting from the demodulation means. Compares the call address with the preset unique address inside and outputs an alarm signal when it is its own call information. Second control means for outputting a call floor answering signal, said monitoring control signal and a voice control signal when information is received, and outputting a data control signal and door opening and closing information by input of a door opening and closing switching signal, and from said second control means. An alarm means for outputting the alarm signal output as an audible signal, a response signal output means for switching the line level of the common communication line 62 to a ground level by switching to a response signal output from the second control means; Generating a tone signal corresponding to the door opening and closing information output from the second control means and transmitting the door opening and closing information generated by the data control signal to the communication line 62; An indoor unit composed of voice signal transmission / reception means connected to the common communication line 62 by a signal input to transmit / receive a voice signal. The entrance to the common control of multi-family door phone characterized by.