CN201341206Y - Visual talkback access control device - Google Patents

Abstract

The utility model relates to a visual intercom access control device, which includes a host and an extension. The host and the extension are the same, and can include: door intercom, image display, internal call and image storage according to the functional modules; the utility model realizes It has a visual intercom, and has a color video storage function, which can store pictures and videos, automatically take pictures of visitors, call and intercom between the indoor unit and the indoor unit, and touch the button. The design is reasonable and has a good market prospect.

Description

Video intercom access control device

technical field

The utility model relates to the field of security control and voice and video intercom, in particular to a visual intercom access control device.

Background technique

Most of the existing video intercom devices have insufficient practical functions, and most of these devices use the separate transmission of audio, video, power and digital signals for communication, resulting in complicated connection lines for the entire device; in addition, the market The data of the product is stored inside the machine and cannot be dumped, causing the stored image to be overwritten, and the indoor unit cannot be connected to multiple units, which lacks humanization.

Contents of the invention

In order to solve the above technical problems, the utility model provides a visual intercom access control device, which has simple wiring, can automatically record or take pictures, has a large external data storage, and can realize mutual calling and intercom between multiple indoor units.

The utility model is realized in this way: a visual intercom access control device, including a host and an extension, connected in series or in parallel, the host and the extension are the same, according to the functional modules can include: door intercom, image display , internal call and image storage; it is characterized in that: the door intercom is that the MIC voice signal is processed and amplified by the hands-free circuit and then enters the audio and video switching circuit, the external device interface circuit, and finally sent to the door machine; The hands-free circuit is also connected with the volume control and the audio power amplifier in turn, amplifies the audio signal sent by the outdoor station, and then pushes the speaker to emit sound;

The image display is to drive the display screen to display corresponding images through the external device interface circuit, door switching circuit, audio switching, video processing circuit, and TFT display module from the image collected by the door station;

The internal call is that the mainframe CPU sends a string of codes to the CPU through the extension communication data circuit, the external device interface circuit, the extension communication data circuit and finally sends it to the CPU during the internal call, and the CPU will judge whether it is called, If it is called, the CPU will control the hands-free circuit, audio power amplifier, volume control, audio follow-up circuit, buttons and indication circuit to work; the extension communication data circuit is used to send and receive indoor extension call code signals;

The image storage is to send the image signal collected by the door station into the image memory for storage through the external equipment interface circuit, the door switching circuit, the audio and video switching circuit, and the video processing circuit; the image storage adopts the SD card slot design.

Description of drawings

Fig. 1 is a schematic diagram of the connection of each machine of the utility model embodiment.

Fig. 2 is a circuit principle block diagram of the embodiment of the utility model.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is described further.

The utility model is a visual intercom access control device, which includes a host and extensions. As shown in Figure 1, the host and each extension are wired in series or in parallel, and three extensions can be connected in series or in parallel; the host The same as the extension, please refer to Figure 2, the utility model can include: door intercom, image display, internal call and image storage according to the functional modules; it is characterized in that: the door intercom is to pass the MIC voice signal through the hands-free circuit After processing and amplification, it enters the audio and video switching circuit, the external device interface circuit, and finally sends it to the outdoor station; the hands-free circuit is also connected with the volume control and audio power amplifier in turn, and the audio signal sent by the outdoor station is amplified. Push the horn to make sound;

The image display is to drive the display screen to display corresponding images through the external device interface circuit, door switching circuit, audio switching, video processing circuit, and TFT display module from the image collected by the door station;

The internal call is that the mainframe CPU sends a series of codes to the CPU through the extension communication data circuit, the external device interface circuit, the extension communication data circuit and finally sent to the CPU during the internal call, and the CPU will judge whether it is called, If it is called, the CPU will control the hands-free circuit, audio power amplifier, volume control, audio follow-up circuit, buttons and indication circuit to work; the extension communication data circuit is used to send and receive indoor extension call code signals;

The image storage is to send the image signal collected by the door station into the image memory for storage through the external equipment interface circuit, the door switching circuit, the audio and video switching circuit, and the video processing circuit; the image storage adopts the SD card slot design.

In order to make the system more beautiful and convenient to use, the host realizes man-machine exchange by touching the keyboard. In addition, the system is equipped with video and audio output ports to realize the external connection of external audio and video equipment such as monitors and TV sets.

In order to express each module of the utility model more clearly, introduce the function of each module among the following Fig. 2 below:

1) External device interface circuit: provide external door phones, cameras, indoor extensions, monitors, sound amplification equipment, etc.

2) Over-current protection: to prevent components from being damaged due to excessive power supply current and short circuit of the outdoor station.

3) VTO power control: used to control the work of two VTOs.

4) Door switch circuit: used to switch the audio and video circuits of two door machines.

5) Audio follower: used to change the impedance of the output audio.

6) Extension data communication circuit: send and receive indoor extension call code signals.

7) Audio and video switching circuit: switch the audio and video signals of the outdoor station and the indoor extension.

8) Hands-free circuit: Provides hands-free function.

9) Volume control: control the sound volume of the indoor unit.

10) Audio power amplifier: amplify the audio signal to enough power to drive the speaker to make sound.

11) Ringing circuit: provide a ringing tone to remind the user.

12) Video processing circuit: video impedance transformation, gating, image memory video switching, etc.

13) TFT display module: convert the video signal into a data signal to drive the display to display.

14) Image memory: record video, take pictures and store corresponding video pictures.

15) CPU: Receive corresponding commands and control corresponding circuits to do corresponding work.

16) Power management module: provide various voltages and supply them to each module.

17) Button and indication circuit: indication of each state of user operation.

18) External power supply: provide a power supply for the whole machine.

The utility model has the following advantages:

1. In the video intercom and image monitoring state, you can also record the image in AVI format and take a photo in JPG format. The storage is clear and high, the capacity is large, and the operation is convenient; it has the function of automatic photo taking, even if you are not at home, you can know the visitor ;

2. With an SD card slot, an external SD card up to 2G can be installed, which greatly increases the number of storage, and can be read with a computer at any time;

3. It can be connected to two outdoor units and four indoor units. In the past, multiple indoor units could not be connected. Even if there are multiple units without forced connection, the image effect will be greatly reduced and the machine will not work normally; this product solves this problem , and realize that the indoor station can call and intercom with the indoor station, making the communication between users more convenient; it can also transfer to other indoor stations when talking with the outdoor station, so that the visitor is more clear;

4. Using touch buttons, the previous machines used mechanical forming methods, and the service life was low; touch not only increases the service life of the buttons, but also facilitates the use and operation, enhances the overall appearance, and greatly improves the product grade;

5. The increased video and audio output ports can be connected to external audio and video equipment such as monitors and TVs, which can increase the user's vision and hearing.

Claims (4)

1. A visual intercom access control device, including a main unit and an extension, which are connected in series or in parallel. The main unit and the extension are the same, and can include: intercom at the door, image display, internal call and image storage according to the functional modules; It is characterized in that: the door intercom is that the MIC voice signal is processed and amplified by the hands-free circuit, and then enters the audio and video switching circuit, the external device interface circuit, and finally sent to the door phone; the hands-free circuit is also sequentially connected with The volume control is connected to the audio power amplifier, and the audio signal sent by the outdoor station is amplified to push the speaker to emit sound; The image display is to drive the display screen to display corresponding images through the external device interface circuit, door switching circuit, audio switching, video processing circuit, and TFT display module from the image collected by the door station; The internal call is that the mainframe CPU sends a string of codes to the CPU through the extension communication data circuit, the external device interface circuit, the extension communication data circuit and finally sends it to the CPU during the internal call, and the CPU will judge whether it is called, If it is called, the CPU will control the hands-free circuit, audio power amplifier, volume control, audio follow-up circuit, buttons and indication circuit to work; the extension communication data circuit is used to send and receive indoor extension calling code signals; The image storage is to send the image signal collected by the door station into the image memory for storage through the external equipment interface circuit, the door switching circuit, the audio and video switching circuit, and the video processing circuit; the image storage adopts the SD card slot design. 2. The video intercom access control device according to claim 1, characterized in that: the host and extensions are connected in series or in parallel, and three extensions can be connected in series or in parallel. 3. The video intercom access control device according to claim 1, characterized in that: said CPU is also connected with a touch button. 4. The video intercom access control device according to claim 1, characterized in that: the host computer is also provided with video and audio output ports to realize external connection of external audio and video equipment such as monitors and televisions.