Efficient voice recognition access control system based on filter amplifier circuit
A filter amplifying circuit and voice recognition technology, applied in the direction of instruments, time register, single input/output register, etc., can solve the problem of low security and stability of the access control system, and improve the security and stability. The effect of improving the recognition accuracy and high conversion efficiency
Inactive Publication Date: 2016-05-25
CHENGDU KANUOYUAN TECH CO LTD
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Problems solved by technology
[0003] The purpose of the present invention is to overcome the defects of low security and stability of the existing access control system, and provide a high-efficiency voice recognition access control system based on a filter amplifier circuit
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[0020] like figure 1 As shown, a kind of high-efficiency speech recognition access control system based on filter amplifier circuit of the present invention, mainly by CPU, the alarm module that is connected with CPU respectively, display module, memory, filter amplifier circuit and access control drive circuit, and It is composed of the access control connected with the access control drive circuit, the A / D conversion circuit connected with the filter amplifier circuit, and the sound sensor connected with the A / D conversion circuit.
[0021] The sound sensor is arranged near the access control and is used for collecting sound signals. The A / D conversion circuit is used to convert the analog signal output by the sound sensor into an electrical signal and output it to the filter amplifier circuit. The filtering and amplifying circuit can filter the interference signal in the electrical signal, amplify the filtered electrical signal and output it to the central processing unit....
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The present invention discloses an efficient voice recognition access control system based on a filter amplifier circuit. The system mainly comprises a central processor, and an alarm module, a display module, a memory, an A / D converter circuit and an access control drive circuit, which are respectively connected with the central processor, an access control connected to the access control drive circuit, and a sound sensor connected to the A / D converter circuit. The system is characterized in that a filter amplifier circuit is in series connection between the A / D converter circuit and the central processor; and the A / D converter circuit comprises a conversion chip U2, an amplifier P1, and an amplifier P2. The invention uses voice recognition to open access, improves security and stability of access management; while the system does not need a key for the conventional lock, and is easier to use. The filter amplifier circuit can filter interference signal in electrical signals, and amplify the filtered electrical signals, so as to improve the recognition accuracy of the system.
Description
technical field [0001] The invention relates to an access control system, in particular to an efficient voice recognition access control system based on a filter amplifier circuit. Background technique [0002] With the rapid development of electronic information technology, traditional door locks continue to develop in the direction of high technology and intelligence. The intelligent identification system combining biometric identification with traditional locks has gradually entered people's lives, and more and more companies use this This kind of intelligent identification system is used in access control management and attendance management, such as IC card identification system, but in practice, the security and stability of IC card identification cannot be well guaranteed, for example, IC cards are easy to be lost or borrowed, these Unstable factors will make the system have certain security risks. Contents of the invention [0003] The purpose of the present inven...
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IPC IPC(8): G07C9/00
CPCG07C9/00563G07C9/37
Inventor 汤福琼
Owner CHENGDU KANUOYUAN TECH CO LTD