CN218450373U

CN218450373U - Digital intercom device based on CANBUS

Info

Publication number: CN218450373U
Application number: CN202122873135.7U
Authority: CN
Inventors: 周流芳
Original assignee: Guangdong Deling Electronic Technology Co ltd
Current assignee: Guangdong Deling Electronic Technology Co ltd
Priority date: 2021-11-23
Filing date: 2021-11-23
Publication date: 2023-02-03
Anticipated expiration: 2031-11-23

Abstract

The utility model aims at providing a strong and digital intercom device based on CANBUS that can greatly increased data transmission distance of interference killing feature. The utility model comprises a host module and a plurality of terminal modules, wherein the host module comprises a power module, an MCU control module, an audio acquisition module, an audio playing module and a plurality of CANBUS communication modules; the power supply module is used for converting input voltage into working voltage required by each module and providing stable power supply voltage for each module; the MCU control module is used for receiving input signals of all the modules and outputting corresponding control signals to control the working state of all the modules; the audio acquisition module is used for acquiring digital audio signals of each terminal; the audio playing module is used for converting the digital audio signal into an analog audio signal and outputting the analog audio signal to a loudspeaker; the CANBUS communication module is used for transmitting digital audio signals and state signals of the host and each terminal. The utility model discloses be applied to communication technology field.

Description

Digital intercom device based on CANBUS

Technical Field

The utility model discloses be applied to communication technology field, in particular to digital intercom device based on CANBUS.

Background

With the popularization of home elevators, the number of supporting devices related to elevators is increasing. In order to better manage the intra-ladder talkback, the bus-system analog audio talkback solves the problem, complex wiring is not needed, wiring cost and property management cost are greatly reduced, but analog audio data are easily interfered by the outside in the transmission process, and sound distortion is caused.

Most of the existing digital talkback relies on an external audio chip to realize the conversion from analog to digital signals and relies on Ethernet to realize the communication of different devices, but the existing digital talkback needs the support of network cables for the use environment, has insufficient transmission distance and cannot be completely popularized to common elevators. If a digital intercom device based on CANBUS can be designed, which has strong anti-interference capability and can greatly increase data transmission distance, the problems can be well solved.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that overcome prior art not enough, provide a digital intercom device based on CANBUS that the interference killing feature is strong and can greatly increased data transmission distance.

The utility model adopts the technical proposal that: the utility model discloses a host computer module and a plurality of terminal module, the host computer module includes power module, MCU control module, audio acquisition module, audio playback module and a plurality of CANBUS communication module, power module, audio acquisition module and audio playback module all with MCU control module electricity is connected, the terminal module pass through CANBUS communication module with MCU control module electricity is connected;

the power supply module is used for converting input voltage into working voltage required by each module and providing stable power supply voltage for each module;

the MCU control module is used for receiving input signals of all the modules and outputting corresponding control signals to control the working state of all the modules;

the audio acquisition module is used for acquiring digital audio signals of each terminal;

the audio playing module is used for converting the digital audio signal into an analog audio signal and outputting the analog audio signal to a loudspeaker;

the CANBUS communication module is used for transmitting digital audio signals and status signals of the host and each terminal.

Furthermore, the host module further comprises a key detection module, the key detection module is electrically connected with the MCU control module, and the key detection module is used for detecting the calling and hanging-up signals of the terminal module.

Further, the terminal module comprises an LCD display module, and the LCD display module is used for inquiring the call signal and transmitting the call signal to the MCU control module.

Further, the power supply module comprises a power supply voltage stabilization chip with the model number AS 1117-3.3.

Further, the MCU control module includes a microcontroller chip of model AT32F407RCT 7.

Further, the CANBUS communication module comprises a CAN bus transceiver chip with the model number TJA 1050.

The utility model has the advantages that: the audio acquisition module is used for acquiring digital audio signals of each terminal, the audio playing module is used for converting the digital audio signals into analog audio signals and then outputting the analog audio signals to the loudspeaker, and the conversion from analog to digital signals can be realized without depending on an external audio chip, so that the talkback conversation between the host and each terminal is realized. The terminal module and the host module transmit digital audio signals and state signals through the CANBUS communication module, and wiring can adopt a twisted pair mode, so that the anti-interference capability is greatly enhanced, data storage and later-stage lookup are facilitated, the problem of distortion of output voice is avoided, the transmission speed and distance of data can be greatly increased, and the wiring cost and the use cost of a user are reduced.

Drawings

FIG. 1 is a schematic view of the connection relationship of the present invention;

FIG. 2 is a circuit schematic of the power module;

FIG. 3 is a schematic circuit diagram of the MCU control module;

FIG. 4 is a schematic circuit diagram of the CANBUS communication module;

fig. 5 is a schematic circuit diagram of the key detection module.

Detailed Description

As shown in fig. 1 to 5, in this embodiment, the present invention includes a host module and a plurality of terminal modules, the host module includes a power module 1, an MCU control module 2, an audio acquisition module 3, an audio playing module 4 and a plurality of CANBUS communication modules 5, the power module 1, the audio acquisition module 3 and the audio playing module 4 are all electrically connected to the MCU control module 2, and the terminal modules are electrically connected to the MCU control module 2 through the CANBUS communication modules 5;

the power module 1 is used for converting an input voltage into a working voltage required by each module and providing a stable power voltage for each module;

the MCU control module 2 is used for receiving input signals of all modules and outputting corresponding control signals to control the working state of all modules;

the audio acquisition module 3 is used for acquiring digital audio signals of each terminal;

the audio playing module 4 is used for converting the digital audio signal into an analog audio signal and outputting the analog audio signal to a loudspeaker;

the CANBUS communication module 5 is used for transmitting digital audio signals and state signals of the host and each terminal.

In this embodiment, the power module 1 includes a power converter and a power voltage stabilizing module, where the power converter is used for externally connecting with mains supply, converting AC220V into common DC12V, and inputting the common DC12V into the duty room; the power supply voltage stabilizing module is used for converting a DC12V power supply input by an external power supply converter into DC3.3V and DC5.0V voltages required by the inside.

In this embodiment, the MCU control module 2 sets an ID for each CAN controller, and the CANBUS communication module 5 determines the ID occupying the CAN bus according to the automatic arbitration of the ID, so as to ensure that there is only one valid message on the CAN bus at the same time.

In this embodiment, the audio acquisition module 3 adopts an MCU to convert analog audio from MIC input by an ADC, perform optimization processing such as filtering and noise reduction before an acquisition point, convert the analog audio into digital signals, and transmit the digital signals to the MCU. The audio playing module 4 adopts MCU peripheral PWM to convert the received digital audio data from MCU into analog audio, and outputs the analog audio to the loudspeaker after optimized processing such as power amplification and filtering.

In this embodiment, the host module further includes a key detection module 6, the key detection module 6 is electrically connected to the MCU control module 2, and the key detection module 6 is configured to detect a call and an on-hook signal of the terminal module.

In this embodiment, the terminal module includes an LCD display module, and the LCD display module is configured to query a call signal and transmit the call signal to the MCU control module 2. The LCD display module and the MCU control module 2 adopt USART communication, and the protocol is standard MODBUS protocol. And inquiring a calling signal and transmitting the calling signal to the MCU control module 2 through an MODBUS protocol to control the two-way conversation of the interphone.

In this embodiment, the power module 1 includes a power supply voltage stabilization chip of model AS 1117-3.3.

In this embodiment, the MCU control module 2 includes a microcontroller chip with a model number of AT32F407RCT 7.

In this embodiment, the CANBUS communication module 5 includes a CANBUS transceiver chip with a model number TJA 1050.

In this embodiment, the terminal module performs transmission of digital audio signals and status signals with the host module through the CANBUS communication module, and the wiring may adopt a twisted pair mode, so as to greatly enhance the anti-interference capability, facilitate data storage and later-stage lookup, and avoid the problem of distortion of output voice. Data are compressed and transmitted by using speed, so that the transmission speed and distance of the data can be greatly increased, and the wiring cost and the use cost of a user are reduced.

Claims

1. The utility model provides a digital intercom device based on CANBUS which characterized in that: the intelligent terminal comprises a host module and a plurality of terminal modules, wherein the host module comprises a power supply module (1), an MCU control module (2), an audio acquisition module (3), an audio playing module (4) and a plurality of CANBUS communication modules (5), the power supply module (1), the audio acquisition module (3) and the audio playing module (4) are all electrically connected with the MCU control module (2), and the terminal modules are electrically connected with the MCU control module (2) through the CANBUS communication modules (5);

the power supply module (1) is used for converting input voltage into working voltage required by each module and providing stable power supply voltage for each module;

the MCU control module (2) is used for receiving input signals of all modules and outputting corresponding control signals to control the working state of all modules;

the audio acquisition module (3) is used for acquiring digital audio signals of each terminal;

the audio playing module (4) is used for converting the digital audio signal into an analog audio signal and outputting the analog audio signal to a loudspeaker;

the CANBUS communication module (5) is used for transmitting digital audio signals and state signals of the host and each terminal.

2. The CANBUS-based digital intercom device according to claim 1, characterized in that: the host module further comprises a key detection module (6), the key detection module (6) is electrically connected with the MCU control module (2), and the key detection module (6) is used for detecting calling and hanging-up signals of the terminal module.

3. The CANBUS-based digital interphone device according to claim 1, characterized in that: the terminal module comprises an LCD display module, and the LCD display module is used for inquiring call signals and transmitting the call signals to the MCU control module (2).

4. The CANBUS-based digital intercom device according to claim 1, characterized in that: the power supply module (1) comprises a power supply voltage stabilizing chip with the model number of AS 1117-3.3.

5. The CANBUS-based digital intercom device according to claim 1, characterized in that: the MCU control module (2) comprises a microcontroller chip with the model of AT32F407RCT 7.

6. The CANBUS-based digital interphone device according to claim 1, characterized in that: the CANBUS communication module (5) comprises a CANBUS bus transceiver chip with the model number TJA 1050.