I. Project design background and overview
With the rapid development of real estate, the demand for smart homes has grown, and the market for building intercom systems has risen. From voice intercom to video intercom, from black and white video intercom to color video intercom, from color video intercom to smart home terminal, many products have monitoring, security alarm and fortification, household access, information Receiving, remote phone alarm, photo message extraction, home appliance control and other functions.
Through investigation, most of the building intercom systems on the market are based on the old-fashioned phone mode, and the manual unlocking function has great limitations. Even high-end intercom systems require human intervention and operation, which is extremely inconvenient. In order to avoid annoyance, we have developed an intelligent voice building intercom system. According to the current market possession and popularity, we decided to use the old-fashioned host part. The extension adopts intelligent speech recognition technology, and adopts the corresponding response mode and unlock mode through the personality requirements of the owner.
Second, the project design principle
1, an overview of the principle
The voice data is collected and processed by the single chip microcomputer to complete a series of functions.
2, the hardware design principle
The voice recognition chip LD3320 is used for voice recognition and voice prompt playback. The ISD4004 recording chip performs message storage, and the entire system is controlled by the SLH89F5162 single chip microcomputer. Unlock the touch button.
3, software design principles
The programming mode of the underlying driver high-level algorithm is used to make the program more readable and changeable.
Third, the project design block diagram
1, hardware design block diagram
2, software design block diagram
Fourth, the test results
Attachment: Technical indicators
Mode switching: long press the mode button for 5 seconds to switch to the next mode (total 4 mode);
Speech recognition: At most 50 words or sentences are added to the speech recognition (the sentence does not exceed 10 words), the recognition sensitivity software is adjustable, and the recognition statement is written once by the software, and the user can freely write after the upgrade;
Message function: The longest message can be 8 minutes, up to 10 times, and the cycle can meet the daily needs;
Talk time: up to 2 minutes, automatically hang up after no response;
Voice content: The voice code in the memory can be read and written by related software tools, and the code is MP3 format.
Attachment 1: Program Engineering Document
Attachment 2: Hardware Engineering Document
Attachment 3: Demo video
Baidu network disk URL:
Annex 1: http://pan.baidu.com/s/1ntho59f
Annex II: http://pan.baidu.com/s/1c0j8Hwc
Annex III: http://pan.baidu.com/s/1jG0XzDW
Unzip password: shenlianhua
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