CN201435762Y - Novel doorphone terminal for building talkback systems - Google Patents

Abstract

A new type of building intercom system door station terminal, characterized in that it includes a baseband processing module, a voice signal amplification and dual audio signal extraction circuit, an input module, an unlocking circuit, a radio frequency transceiver module, a radio frequency power amplifier and a switching circuit, and an antenna. The utility model uses existing mobile terminals such as fixed-line landlines or Xiaoling telephones, GSM mobile phones, CDMA mobile phones, and 3G mobile phones as user machine terminals; utilizes the standard cellular network to access the existing fixed-line network and mobile cellular network to form Practical wireless building intercom network; use the voice and dual-tone signal (DTMF) of each telephone network to complete the intercom and unlocking functions of the building intercom system; use the editable user room number and telephone number correspondence table stored in the memory chip To complete the number conversion function of the VTO terminal calling the user terminal. And the circuit is simpler and the design is reasonable. When installing the building intercom system, it avoids repeated investment in system wiring and user terminals, and also saves a lot of relay equipment.

Description

A new type of building intercom system door station terminal

Technical field

The utility model relates to a door station terminal, in particular to a new door station terminal of a building intercom system.

Background technique

At present, the known building intercom systems are all self-contained systems. The whole system includes door phone terminals, user machine terminals, community management terminals and several relay devices, and the terminals and relay devices of various manufacturers are not compatible. The installation of the system needs to realize the connection of each user terminal through independent network wiring. The wiring project is huge, the connection is complicated and requires special maintenance. However, the existing wireless intercom system can only be realized on the one-to-one system used in villas (and the whole system has only one door terminal and several user terminals) due to the relevant regulations and restrictions on radio applications in the country, and the use of The distance is limited and cannot be scaled.

Utility model content

The purpose of this utility model is to provide a new type of building intercom system door terminal with reasonable lines, which uses the user's existing landline, PHS, mobile phone, etc. as a user terminal to access the building intercom system to realize wireless building intercom.

The purpose of this utility model can be achieved through the following measures: a new type of building intercom system door station terminal, characterized in that: including baseband processing module, voice signal amplification and dual audio signal extraction circuit, input module, unlocking circuit, radio frequency transceiver module, RF power amplifier, switching circuit, and antenna. The visitor inputs the room number of the floor to be called through the input module. The registered telephone number is sent to the standard cellular network through the radio frequency transceiver module, radio frequency power amplifier and switching circuit, and the antenna to make a call. After the owner talks with the visitor, the owner sends the corresponding dual audio signal through the phone, and the voice signal of the outdoor station terminal is amplified and The dual-audio signal extraction circuit analyzes the value of the dual-audio signal on the voice channel and sends it to the baseband processing module. The baseband processing module compares the value of the received dual-audio signal with the value of the specified unlocking signal, and controls the unlocking circuit if it is completely consistent. Unlock the lock for visitors.

The purpose of this utility model can also be achieved through the following measures: the baseband processing module is used as the central processing unit of the whole system, and is composed of a microcontroller, a digital signal processor, a storage circuit and a peripheral circuit, and the microcontroller completes the entire doorway. The control and management of other modules and circuits of the computer terminal, while the microprocessor completes the software functions required for accessing the mobile cellular network. The phone number of the owner who accepts the building intercom service is firstly registered at the terminal of the outdoor station, and the correspondence table between the floor room number and the registered phone number is stored in the storage circuit of the baseband processing module. Depending on the type of cellular network to be connected, the baseband processing module, radio frequency transceiver module, radio frequency power amplifier and switching circuit can choose the circuit and software protocol corresponding to the cellular network, such as: GSM, CDMA, WCDMA, CDMA2000, TD-SCDMA . A display circuit is also connected to the output end of the baseband processing module. The baseband processing module is also connected to the pickup. The output end of the voice signal amplification and dual audio signal extraction circuit is connected with the loudspeaker.

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

1. Use the existing fixed-line landline or Xiaoling telephone, GSM mobile phone, CDMA mobile phone, 3G mobile phone and other mobile terminals as the user terminal to access the building intercom system; use the standard cellular network to access the existing fixed-line network , mobile cellular network to form a practical wireless building intercom network; use the voice and dual audio signals (DTMF) of each telephone network to complete the intercom and unlock functions of the building intercom system; use the editable user room number stored in the memory chip The corresponding table with the telephone number is used to complete the number conversion function for the outdoor station terminal to call the user terminal.

2. The circuit is simpler and the design is reasonable. When installing the building intercom system, it avoids repeated investment in system wiring and user terminals, and also saves a lot of relay equipment. Fundamentally realized the wireless building intercom.

Description of drawings

Fig. 1 is the circuit principle block diagram of the utility model.

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 baseband processing module 1, voice signal amplification and dual audio signal extraction circuit 2, input module 3, unlocking circuit 4, radio frequency transceiver module 5, radio frequency power amplifier and switching circuit 6, antenna 7, display circuit 8 , pickup 9, loudspeaker 10 etc. Display circuit 8, sound pick-up 9, loudspeaker 10 etc. are contained on the gate. The baseband processing module 1, as the central processing unit of the whole system, is composed of a microcontroller, a digital signal processor, a storage circuit and peripheral circuits, and the microcontroller completes the control and management of other modules and circuits of the entire outdoor station terminal. At the same time, the microprocessor completes the software functions required for accessing the mobile cellular network. According to the different types of the cellular network to be accessed, the baseband processing module 1, the radio frequency transceiver module 5, the radio frequency power amplifier and the switching circuit 6 can select circuits and software protocols corresponding to the cellular network, such as: GSM, CDMA, WCDMA, CDMA2000, TD-SCDMA, etc. For real-time control, dual-tone signal (DTMF) is selected as the control signal of the wireless remote control of the user terminal, and the dual-tone signal (DTMF) is analyzed on the sound channel through the dual-tone signal (DTMF) extraction circuit, and converted into a microcontroller Recognizable signals are input to the microcontroller for use by the microcontroller.

During actual work, the phone number of the owner receiving the building intercom service is first registered at the door station terminal, and the correspondence table between the floor room number and the registered phone number is stored in the storage circuit of the baseband processing module 1 . The visitor inputs the floor room number to be called through the input module 3, and the baseband processing module 1 waits for the user to confirm after reading the input floor room number. After the user confirms, the baseband processing module 1 calls out the registered phone number corresponding to the corresponding floor room number, Through the radio frequency transceiver module 5, radio frequency power amplifier and switching circuit 6, and antenna 7, it is sent to the standard cellular network to make a call. After the call is connected, the visitor talks with the owner. During the call, the owner enters a specific number through the digital dial keyboard Key or key combination, the owner's phone sends out the corresponding dual audio signal, the voice signal amplification of the outdoor station terminal and the dual audio signal extraction circuit 2 parses the value of the dual audio signal on the voice channel and sends it to the baseband processing module 1, the baseband processing module 1. Comparing the value of the received dual audio signal with the value of the prescribed unlocking signal, if completely consistent, the unlocking circuit 4 is controlled to unlock the visitor. The owner can also use the mobile phone or fixed line corresponding to the phone number stored at the door station terminal to dial the phone number of the door station terminal. number, unlock code, etc.). In order to be more convenient for the user to use, a display circuit 8 can be added, which provides the user with status display and various visual prompt functions during the user's use. When accessing the 3G network, an image interface can be added to the baseband processor, and the video transmission function of the 3G network can be used to achieve a visual outdoor station terminal.

Claims (7)

1. A new type of building intercom system door phone terminal, characterized in that it includes a baseband processing module (1), a voice signal amplification and dual audio signal extraction circuit (2), an input module (3), an unlocking circuit (4), RF transceiver module (5), RF power amplifier and switching circuit (6), antenna (7), the visitor inputs the floor room number to be called through the input module (3), and the baseband processing module (1) reads the input floor room number And wait for the user to confirm, call out the registered telephone number corresponding to the room number of the corresponding floor from the baseband processing module (1), and send it to the standard cellular phone number through the radio frequency transceiver module (5), radio frequency power amplifier and switching circuit (6), antenna (7) Network to make a call, after the owner talks with the visitor, the owner sends the corresponding dual-tone signal through the phone, the voice signal amplification of the outdoor station terminal and the double-tone signal extraction circuit (2) analyze the value of the double-tone signal on the voice channel and send it to the The baseband processing module (1), the baseband processing module (1) compares the value of the received dual audio signal with the value of the prescribed unlocking signal, and if completely consistent, controls the unlocking circuit (4) to unlock the visitor. 2. The door phone terminal of the new building intercom system according to claim 1, characterized in that: the baseband processing module (1) is used as the central processing unit of the entire system, and consists of a microcontroller, a digital signal processor, a storage circuit and peripheral The circuit is composed of a micro-controller to complete the control and management of other modules and circuits of the entire outdoor station terminal, and the micro-processor completes the software functions required for accessing the mobile cellular network. 3. The door phone terminal of the new building intercom system according to claim 1 or 2, characterized in that: the phone number of the owner who accepts the building intercom service is first registered at the door phone terminal, and the correspondence table between the floor room number and the registered phone number Stored in the storage circuit of the baseband processing module (1). 4. The door phone terminal of the new building intercom system according to claim 1, characterized in that: according to the type of cellular network to be accessed, the baseband processing module (1), radio frequency transceiver module (5), radio frequency power amplifier and The switching circuit (6) can select the circuit and software protocol corresponding to the cellular network, such as: GSM, CDMA, WCDMA, CDMA2000, TD-SCDMA. 5. The door phone terminal of the new building intercom system according to claim 1, characterized in that: a display circuit (8) is also connected to the output end of the baseband processing module (1). 6. The door phone terminal of the new building intercom system according to claim 1, characterized in that: the baseband processing module (1) is also connected to the pickup (9). 7. The door phone terminal of the new building intercom system according to claim 1, characterized in that: the output end of the voice signal amplification and dual audio signal extraction circuit (2) is connected to the speaker (10).

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