CN201194418Y - Wireless automatic switcher between telephone set and building intercom device - Google Patents

Abstract

A wireless automatic switcher between a telephone set and a building intercom device, including a door phone and an electric control lock, characterized in that: a building intercom wireless access terminal connected to the door phone is also provided, and the building intercom wireless access terminal passes through The radio frequency signal communicates with the wireless access terminal of the telephone set. The wireless access terminal of the telephone set is installed indoors. The external line of the telephone is connected with the external line interface of the wireless access terminal of the telephone set. interface. The utility model can more conveniently connect the household fixed telephone to the building intercom system, without being restricted by lines, and the access mode is reasonable. Several telephones can be connected to one telephone set and the wireless automatic switcher of the building intercom device, and several intercom operation terminals can be expanded to save costs. The telephones in each room can be used to complete the building intercom function, which is more convenient to use. The existing cordless telephone can be directly used to complete the mobile intercom function, and the range of use and operation of the user becomes larger. It can be used in parallel with the original indoor extension without affecting the use of the original indoor extension.

Description

Wireless automatic switcher between telephone set and building intercom device

technical field

The utility model relates to an automatic switcher, in particular to a wireless automatic switcher between a telephone set and a building intercom device.

Background technique

At present, building intercom devices are mostly fixed installations. Indoor extensions are generally installed in the room. Every time a visitor comes, you have to go to the fixed installation place to answer and open the door. It is very inconvenient, especially when there are many rooms, large places or duplex rooms. Now users generally solve this problem by installing more indoor extensions, but this will increase the number of wiring and extensions, and the cost of components and engineering will increase significantly. The existing telephone and building intercom device automatic switcher building intercom access and telephone access are made in one machine, and the wiring path of the telephone line is often different from the wiring path of the building intercom, so the two It is not very convenient to access a machine via the route.

Utility model content

The purpose of the utility model is to provide a wireless automatic switcher between a telephone set and a building intercom system with reasonable wiring, convenient use and cost saving, which can conveniently connect a household fixed telephone wirelessly to a building intercom system.

The purpose of this utility model can be achieved through the following measures: a wireless automatic switcher between a telephone set and a building intercom device, including a door phone and an electric control lock, and is characterized in that: a building intercom wireless switch connected with the door phone is also provided. Access terminal, the building intercom wireless access terminal communicates with the telephone wireless access terminal through radio frequency signals, the telephone wireless access terminal is installed indoors, and the telephone external line is connected to the telephone external line interface of the telephone wireless access terminal The phone is connected to the phone interface of the phone wireless access terminal.

The purpose of the utility model can also be achieved through the following measures: the building intercom wireless access terminal includes a control unit, a receiving demodulation circuit, a modulation and transmitting circuit, an audio amplifier circuit, an audio matching circuit, and a building intercom state control signal detection and generation Circuit, building intercom system interface, duplexer, the control unit receives the demodulated digital signal sent from the receiving demodulation circuit, and processes it, encodes the digital signal to be sent to the modulation and transmitting circuit for transmission, and receives it from the The building intercom status control signal detection and generation circuit sends and processes the building intercom status control signal, and controls the status of the building intercom system by controlling the building intercom status control signal detection and generating circuit to simulate the building intercom status control signal , the receiving demodulation circuit receives the modulated signal, after high-frequency amplification, frequency conversion, intermediate frequency amplification, frequency discrimination and low-frequency amplification, it outputs two signals, one audio signal is input to the audio power amplifier circuit, and the other signal is input to the control unit. The modulation and transmission circuit has Two-way input, one digital signal input terminal is connected to the control unit, and the other audio signal input is sent by the audio pre-amplification circuit. The two-way signals are modulated and amplified and then output to the duplexer. The audio signal is amplified and then output to the audio line of the building intercom line. The audio matching circuit adjusts the audio signal sent from the audio line to the amplitude suitable for modulation by the modulation and transmission circuit and sends it to the modulation and transmission circuit. The building intercom status control signal The detection and generation circuit detects the call, cancel, off-hook, and on-hook control signals on the signal line of the building intercom system and converts them into signals that can be recognized by the single-chip microcomputer in the control unit and sends them to the single-chip microcomputer, and sends the call, off-hook, on-hook, The unlocking control signal is converted into the standard signal of the building intercom system and sent to the signal line, and the building intercom system interface connects the audio line, control line, and data line of the building intercom to the building intercom wireless access terminal. The input terminal of the control unit is also connected with a building intercom address setting circuit. Telephone wireless access terminal includes control unit, receiving and demodulating circuit, modulating and transmitting circuit, audio mixing circuit, telephone ring current generating circuit, telephone power supply circuit, DTMF signal detection circuit, telephone state detection circuit, building intercom and telephone outside line Switching circuit, telephone interface, duplexer, telephone external line interface, the letter sent by the building intercom wireless access terminal passes through the antenna of the telephone wireless access terminal, the duplexer to the receiving demodulation circuit, and is sent by the receiving mediation circuit The output digital signal is sent to the control unit. After being processed by the control unit, the voltage on the telephone line and whether there is a telephone ring current is detected by the telephone state detection circuit. When the telephone ring current is detected or the telephone is in the off-hook state, the control unit code is busy The signal is sent to the modulation and transmitting circuit and sent out. If there is no ringing current and the telephone is on-hook, the control unit controls the building intercom and telephone line switching circuit to disconnect the received phone from the telephone line and connect to the intercom line. The telephone power supply circuit supplies power to the telephone line. The control unit controls the telephone ring current generation circuit to generate the telephone ring current and send it to the telephone to control the telephone to ring. At the same time, the coded idle signal is sent to the modulation transmitter circuit and sent to the audio mixing circuit. Power on and enter the call state. During the call, the control unit monitors the DTMF signal sent by the telephone through the DTMF signal detection circuit. If the user needs to open the door for the visitor, he can operate the telephone keypad to send the corresponding DTMF signal, and send the unlock signal to the modulator through the control unit. The transmitting circuit sends it to the building intercom wireless access terminal after modulation. The control unit can output signals to control the load circuit to keep the external line uninterrupted, then connect the telephone to the building intercom line, and send the coded off-hook signal to the modulation and transmitting circuit, and send it to the building intercom wireless access terminal, directly entering the building intercom In the call state, after the building intercom is completed, the control unit is notified to switch back to the outside line by operating the telephone keypad with a DTMF signal. The telephone line is disconnected.

Compared with the prior art, the utility model has the following advantages:

1. It is more convenient to connect the household fixed-line phone to the building intercom system, without being limited by the line, and the access method is reasonable.

2. Several telephones can be connected to one telephone set and the wireless automatic switcher of the building intercom device, and several intercom operation terminals can be expanded to save costs.

3. The telephone in each room can be used to complete the building intercom function, which is more convenient to use.

4. The existing cordless telephone can be directly used to complete the mobile intercom function, and the range of use and operation of the user becomes larger.

5. It can be used in parallel with the original indoor extension without affecting the use of the original indoor extension.

Description of drawings

Fig. 1 is a functional block diagram of the utility model system;

Fig. 2 is a schematic block diagram of the building intercom wireless access terminal circuit of the present invention;

Fig. 3 is a circuit principle block diagram of the wireless access terminal of the telephone set of the present invention.

Detailed ways

The utility model will be described in further detail below in conjunction with accompanying drawing (embodiment):

Referring to Fig. 1, the utility model includes a building intercom wireless access terminal 1, a telephone wireless access terminal 2, a door machine 3, an electronically controlled lock 4, and the like. The building intercom door phone 3 is installed at the gate and connected to the indoor extension by wire. When installing the building intercom wireless access terminal 1, the audio signal line and the intercom control signal line of the door phone 3 are connected to the Enter the building intercom wireless access terminal 1. The indoor extension can be directly replaced by the building intercom wireless access terminal 1; the original indoor extension can also be retained, and the original indoor extension can be connected with the building intercom wireless access terminal 1. ; Building intercom wireless access terminal 1 is connected with telephone wireless access terminal 2 through radio frequency signal; The telephone external line interface of 2, and the household telephone 5 is connected to the telephone interface of the telephone access terminal. Before use, the building intercom wireless access terminal 1 and the telephone wireless access terminal 2 are coded, and the code values are stored in the electrically erasable memories in the respective control units. When the wireless access terminal 2 of the telephone set is in the standby state, the telephone set is directly connected to the outside line.

Referring to Figure 2, the building intercom wireless access terminal 1 includes a control unit 101, a receiving demodulation circuit 102, a modulation and transmitting circuit 103, an audio amplifier circuit 104, an audio matching circuit 105, a building intercom state control signal detection and generation circuit 106, Building intercom system interface 107, duplexer 108, building intercom address setting circuit 109, etc. The control unit 101, as the central control part of the entire building intercom wireless access terminal 1, is composed of a single-chip microcomputer, an electrically erasable memory, a peripheral circuit of the single-chip microcomputer and a control circuit. The demodulated digital signal that comes over is processed; the digital signal to be encoded is sent to the digital signal input terminal of the modulation transmitter circuit 103 for transmission; the signal detection and generation circuit 106 sends over the received 106 building intercom state control signal Building intercom state control signal and process it; control the state of the building intercom system by controlling the building intercom state control signal detection and generating circuit 106 to simulate the building intercom state control signal; store the building intercom wireless access terminal 1 address code and the address code of the wireless access terminal 2 of the telephone set. The receiving demodulation circuit 102 receives the modulated signal, and outputs two signals after high frequency amplification, frequency conversion, intermediate frequency amplification, frequency discrimination and low frequency amplification, one audio signal is input to the audio power amplifier circuit 104, and one digital signal is input to the single chip microcomputer. Modulating and transmitting circuit 103 has two-way input, one digital signal input end, connects single-chip microcomputer, generates the digital signal input that needs to send by single-chip microcomputer, one-way audio signal input end, inputs the audio signal sent by audio frequency matching circuit 105; Two-way signal passes through After the modulation is amplified, it is output to the duplexer 108 . The audio amplification circuit 104 amplifies the power of the audio signal input from the reception demodulation circuit 102 and outputs it to the audio line of the building intercom line. The audio matching circuit 105 adjusts the audio signal sent from the audio line of the building intercom line to an amplitude suitable for modulation by the modulating and transmitting circuit 103 and sends it to the audio signal input terminal of the modulating and transmitting circuit 103 . Building intercom state control signal detection and generation circuit 106 detects control signals such as call, cancel, off-hook, and on-hook on the signal line of the building intercom system's home line, and converts them into signals that can be recognized by the single-chip microcomputer and sends them to the single-chip microcomputer for use by the single-chip microcomputer; Convert the calls, off-hook, on-hook, and unlock signals sent by the single-chip microcomputer into standard signals of the building intercom system and send them to the signal line of the building intercom system's home line. The building intercom system interface 107 connects the audio line, control line and data line of the building intercom to the building intercom wireless access terminal.

Referring to Fig. 3, the wireless telephone access terminal 2 includes a control unit 201, a receiving and demodulating circuit 202, a modulation and transmitting circuit 203, an audio mixing circuit 204, a telephone ring current generating circuit 205, a telephone power supply circuit 206, and a DTMF signal detection circuit 207 , Telephone state detection circuit 208, building intercom and telephone line switching circuit 209, telephone interface 210, duplexer 211, telephone line interface 212, load circuit 214, etc.

The control unit 201, as the central control part of the entire telephone wireless access terminal, is composed of a single-chip microcomputer, an electrically erasable memory, a peripheral circuit of the single-chip microcomputer and a control circuit. The demodulated digital signal is processed; the digital signal to be sent by encoding is sent to the digital signal input terminal of the modulation transmitter circuit 203, and sent; machine ringing; read the decoded dual-tone signal sent by the DTMF signal detection circuit 207; read the telephone state signal sent by the telephone state detection circuit 208, and make corresponding processing according to the telephone state; control the building intercom and The external telephone line switching circuit 209 connects the telephone set to the external telephone line or building intercom line; stores the building intercom wireless access terminal address code and the telephone set wireless access terminal address code. The receiving demodulation circuit 202 receives the modulated signal, and outputs two signals after high frequency amplification, frequency conversion, intermediate frequency amplification, frequency discrimination and low frequency amplification, one audio signal is input to the audio mixing circuit 204, and one digital signal is input to the single chip microcomputer. The modulation and transmitting circuit 203 has two inputs, one digital signal input terminal, which is connected to the single-chip microcomputer, and the single-chip microcomputer generates digital signal input to be sent, and one audio signal input terminal, which inputs the audio signal sent by the audio mixing circuit 204. The two-way signals are output to the duplexer 211 after being modulated and amplified. The audio mixing circuit 204 converts two channels of audio signals, one input and one output, into one transmission signal suitable for telephone audio transmission requirements. The telephone ring current generating circuit 205 generates the telephone ring current and sends it to the telephone, so that the telephone rings. The telephone power supply circuit 206 is to provide the voltage, current and load similar to that of the telephone outside line when the telephone set is transferred to the villa intercom line, so that the intercom line has the same characteristics as the telephone outside line. The DTMF signal detection circuit 207 detects the dual-tone signal sent by the telephone, and converts the signal into a parallel digital signal that can be recognized by the single-chip microcomputer and sends it to the single-chip microcomputer for analysis and utilization. The telephone state detection circuit 208 is a circuit for detecting the state of use of the telephone set, and judges whether the telephone set is responding to an outside call signal by detecting whether there is a telephone ring current on the telephone line; judges whether the telephone set is in an off-hook state or not by detecting the voltage of the telephone line. On-hook state, and convert various states into signals that can be recognized by the single-chip microcomputer and send them to the single-chip microcomputer. The building intercom and telephone outside line switching circuit 209 is a circuit for switching the telephone set between the telephone outside line and the building intercom line through an electronic switch.

The working mode of the wireless automatic switcher between the telephone set and the building intercom device is as follows:

When the control unit 101 of the building intercom wireless access terminal detects the call signal of the outdoor station through the building intercom state control signal detection and generation circuit 106, it reads the address code of the telephone wireless access terminal from the electrically erasable memory , code the call command and address and send it to the data input terminal of the modulation and transmission circuit 103, and the modulated signal is filtered and amplified, sent to the duplexer 108, and sent out through the antenna.

The signal reaches the receiving demodulation circuit 202 through the antenna of the wireless access terminal 2 of the telephone set and the duplexer 211. After filtering and demodulation, the digital signal is restored, and is sent to the control unit 201 by the digital signal output terminal of the receiving demodulation circuit 202. After the single-chip microcomputer in the control unit 201 receives the order, the address code in the order is compared with the address stored in the electric erasable memory. If the address does not match, it will not be processed; otherwise, the telephone status detection circuit 208 will detect the telephone number. Line voltage and whether there is a telephone ring current (if the telephone is on-hook, the telephone line is a high voltage of about 50V, if it is off-hook, the telephone line is a low voltage of about 5V), when the telephone is detected When the ringing current or the telephone set is in the off-hook state, the control unit 201 encodes a busy signal and sends it to the data input terminal of the modulation transmitter circuit 203 to send out; The external telephone line switching circuit 209 disconnects the received telephone from the external telephone line and connects it to the intercom line. The telephone power supply circuit 206 supplies power to the telephone line. The machine controls the telephone to ring, and the coded idle signal is sent to the data input terminal of the modulation and transmitting circuit 203 to send out. During the period, if a cancellation signal from the building intercom wireless access terminal is received, the telephone wireless access terminal returns to the standby state.

If the telephone is in an idle state, the control unit 201 of the wireless access terminal of the telephone monitors the off-hook state of the telephone through the telephone state detection circuit 208, and after detecting that the telephone is off-hook, the coded off-hook signal is sent to the modulation transmitter circuit 203 for data The input end is sent to the building intercom wireless access terminal 1, and the audio mixing circuit 204 is powered on to enter the call state. During the call, the control unit 201 monitors the DTMF signal sent by the telephone through the DTMF signal detection circuit 207, and converts the DTMF signal into a digital signal recognizable by the microcontroller. If the user needs to open the door for the visitor, he can operate the telephone keypad to send out the corresponding DTMF signal. After the control unit 201 receives the code of the DTMF signal, it compares it with the fixed code of the unlock signal, and if it matches, it sends the unlock signal to the data input terminal of the modulation transmitter circuit 203. After modulation, it is sent to the building intercom wireless access terminal. After the on-hook signal of the telephone is detected, the on-hook signal is sent to the building intercom wireless access terminal, and the building intercom and telephone outside line switching circuit 209 is released at the same time. The telephone set is connected back to the outside line again, and the wireless access terminal of the telephone set enters the standby state.

When the telephone is in a call state, the user can choose to hang up after hearing the ringtone of the indoor extension, and the control unit 201 of the wireless access terminal of the telephone detects that the telephone is on-hook through the telephone state detection circuit 208, and then controls the building intercom and telephone The external line switching circuit 209 disconnects the received phone from the external line of the telephone and connects it to the intercom line. The telephone power supply circuit 206 supplies power to the telephone line. The control unit 201 controls the telephone ring current generating circuit 205 to generate a telephone ring current and send it to the telephone. , control the ringing of the telephone set, and send the coded idle signal into the data input end of the modulation transmitter circuit 203 to send out simultaneously, and enter the processing flow that the telephone set is in an idle state. The user can also choose not to hang up the outside line, first deal with the building intercom and then switch back to the outside line to continue the conversation. The specific processing process is as follows: through the operation of the telephone keypad, the control unit 201 of the wireless access terminal of the telephone is notified with a DTMF signal To carry out the above operations, after receiving the command, the control unit 201 first controls the load circuit 214, which has the same internal resistance as that of the telephone when it is off-hook, to hook the external line, keep the external line uninterrupted, and then connect the telephone to the building intercom line, The coded off-hook signal is sent to the data input terminal of the modulation and transmitting circuit 203 and sent to the building intercom wireless access terminal, directly entering the building intercom call state. After handling the building intercom, by operating the telephone keypad, the control unit 201 of the wireless access terminal of the telephone is notified to switch back to the outside line with a DTMF signal, and the control unit 201 of the wireless access terminal of the telephone set releases the switching circuit between the building intercom and the telephone outside line 209, reconnect the telephone set to the outside line, and disconnect the load circuit 214 from the telephone line. The building intercom wireless access terminal waits for an off-hook command from the telephone wireless access terminal after sending out a call command. When receiving the off-hook signal from the wireless access terminal of the telephone set, the control unit 101 controls the building intercom state control signal detection and generation circuit 106 to send the off-hook signal to the door station 3, connect the audio channel, and the door phone sends up The audio signal is adjusted by the audio matching circuit 105 to an amplitude suitable for the modulation by the modulation and transmission circuit 103, and sent to the audio signal input end of the modulation and transmission circuit 103, and then sent to the wireless access terminal of the telephone after being filtered, modulated and amplified. The audio modulation signal sent over is sent to the audio amplifier circuit 104 through the audio signal output port after being demodulated by the receiving demodulation circuit 102, and sent to the door station after being amplified. During the period, the telephone set wirelessly accesses the unlocking and on-hook signals sent by the terminal, and the control unit 101 controls the building intercom state control signal detection and generation circuit 106 to send it to the door station. The call and cancel signals sent by the outdoor station are also detected by the building intercom state control signal detection and generation circuit 106, and then converted into signals recognizable by the single-chip microcomputer and sent to the single-chip microcomputer.

In addition, the telephone connected to the telephone interface 210 of the telephone wireless access terminal can use the telephone keyboard to send out DTMF signals to control the telephone and the wireless automatic switcher of the building intercom device to actively communicate with other terminals of the building intercom system .

In this way, the utility model can complete the called, calling, talking and unlocking functions of the building intercom system through the household landline telephone.

If the building intercom extension is a decoding extension in the bus system, a building intercom address setting circuit 110 can be added to the building intercom wireless access terminal to input the address of the indoor extension into the single-chip microcomputer for processing by the single-chip microcomputer.

If a telephone dialing circuit is added to the wireless access terminal of the telephone set, and the switching circuit 209 between the building intercom and the telephone outside line can be switched arbitrarily by three parties, the building intercom system can also make outside calls, that is, when no one answers indoors, through The telephone network calls the user's pre-set telephone number (such as the user's mobile phone), connects the phone, and the user can communicate with the visitor at the door or the administrator at the management machine through the phone, and can send DTMF by operating the phone keyboard Signal to unlock remotely.

Claims (5)

1. telephone set and the wireless automatic switchover device of building talkback device, comprise doorway machine (3), electric control lock (4), it is characterized in that: also be provided with the building talkback wireless access terminal (1) that is connected with doorway machine (3), building talkback wireless access terminal (1) is by radiofrequency signal and telephone set wireless access terminal (2) communication, telephone set wireless access terminal (2) is loaded on indoor, outside line is connected with the outside line interface of telephone set wireless access terminal (2), and home telephone (5) inserts the telephone interface of telephone set wireless access terminal (2).

2. a kind of telephone set according to claim 1 and the wireless automatic switchover device of building talkback device, it is characterized in that: building talkback wireless access terminal (1) comprises control unit (101), receiving demodulation circuit (102), modulation transmitter (103), audio amplifier circuit (104), audio frequency match circuit (105), the building talkback state control signal detects and generation circuit (106), building conversational system interface (107), duplexer (108), control unit (101) receives the demodulated digital signal of sending from receiving demodulation circuit (102), its output is connected with modulation transmitter (103), the building talkback state control signal detects and circuit (106) takes place and is connected with control unit (101), receiving demodulation circuit (102) receives modulation signal, its output one tunnel is connected with audio power amplifier circuit (104), another road is connected with control unit (101), the input of modulation transmitter (103), one the tunnel is connected with control unit (101), another road is connected with audio frequency pre-amplification circuit (105), the output of modulation transmitter (103) is connected with duplexer (108), the input of audio amplifier circuit (104) is connected with receiving demodulation circuit (102), its output is connected with building conversational system interface (107), the input of audio frequency match circuit (105) is connected with building conversational system interface (107), its output is connected with system radiating circuit (103), the building talkback state control signal detects and circuit (106) takes place and is connected with building conversational system interface (107), and building conversational system interface (107) is with the tone frequency channel wire of building talkback, control line, data wire inserts building talkback wireless access terminal (1).

3. a kind of telephone set according to claim 2 and the wireless automatic switchover device of building talkback device is characterized in that: the input at control unit (101) also is connected with building talkback address setting circuit (109).

4. a kind of telephone set according to claim 1 and the wireless automatic switchover device of building talkback device, it is characterized in that: telephone set wireless access terminal (2) comprise control unit (201), receiving demodulation circuit (202), modulation transmitter (203), audio mix circuit (204), phone ringing-current generation circuit (205), telephone set power supply circuits (206), dtmf signal testing circuit (207), telephone state testing circuit (208), building talkback and outside line commutation circuit (209), telephone interface (210), duplexer (211), outside line interface (212), the letter that building talkback wireless access terminal (1) is sent here is the antenna through telephone set wireless access terminal (2), duplexer (211) arrives receiving demodulation circuit (202), receiving the output of reconciling circuit (202) is connected with control unit (201), the input of control unit (201) also is connected with dtmf signal testing circuit (207) and telephone state testing circuit (208) respectively, its output is connected with outside line commutation circuit (209) with modulation transmitter (203) and building talkback with phone ringing-current generation circuit (205) respectively, audio mix circuit (204) is connected with modulation transmitter (203), and telephone set power supply circuits (206) are connected with outside line commutation circuit (209) with building talkback.

5. according to claim 2 or 4 described telephone sets and the wireless automatic switchover device of building talkback device, it is characterized in that: control unit (201) also is connected with the output of load circuit (214), and the output of load circuit is connected with outside line interface (212).

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