Suspicious door opening sound identification apparatus and identification method

Abstract

The invention discloses a suspicious door opening sound identification apparatus and identification method. The identification apparatus comprises a sound trigger module, a sound acquisition module, a sound characteristic extraction processing module, a sound identification module and an alarm module which are successively connected. When environment sound energy is greater than a threshold, acquired sound is preprocessed and converted into digital signals; characteristic parameters are obtained by performing characteristic extraction on the digital signals, and a characteristic vector Fi' to be identified is obtained after an order-of-magnitude difference is eliminated; and a similarity Si between the Fi' and a prestored characteristic vector F' corresponding to prestored door opening sound is calculated, the type of a sample to be identified is determined according to the Si, and accordingly whether acquired sound is the suspicious door opening sound is determined. According to the invention, theft prevention of a door lock is enhanced through identifying the suspicious door opening sound, accordingly, the safety of the door lock is improved, and possibly generated illegal door opening behaviors substantially different from normal door opening round can be effectively prevented.

Description

technical field [0001] The invention relates to sound recognition technology, in particular to a recognition device and recognition method specially used for suspicious door opening sounds, so as to improve the anti-theft safety of door locks, and belongs to the field of door lock anti-theft technology. Background technique [0002] With the gradual popularization of home intelligence, smart refrigerators, smart cleaning robots, and smart TVs have entered the homes of ordinary people, but intelligent anti-theft doors have not yet entered the market. With the continuous enhancement of people's awareness of home and other property safety, higher requirements are put forward for the intelligence of the anti-theft, anti-robbery and anti-smashing access control system. [0003] At present, most home anti-theft doors, car doors, etc. all adopt keys to unlock, so a current design direction is to improve the structure of the lock to further enhance its safety. Although the design o...

AI Technical Summary

Problems solved by technology

Although the design optimization of locks can effectively reduce some lock-picking theft incidents, there are still a large number of lock-picking or door-breaking theft cases

Its reason is: (1) the improvement of above-mentioned lock still can't avoid the risk that the thief uses unlocking tool or master key to open the door; (2) can't detect other abnormal door-opening events to take place, as destructive switch, such as prying the door etc.; Based on this, Recognizing the sound of normal and suspicious door opening (referring to the sound of burglar opening the door, etc.) is a key issue and technology for intelligent anti-theft doors, which has broad application prospects and practical value

[0004] In addition to ordinary door locks, there has also been an access control technology that uses voice recognition technology to identify passwords or speaker identities. Although this technology has high security, it also has some shortcomings: (1) Most users are accustomed to using traditional locks. Open the door with the key, but the voice recognition technology is not very acceptable, and the popularity is not wide

(2) The system is complicated and the price is high. At present, it is mainly used in important units, and it is rarely used in ordinary houses; (3) The speech recognition technology is easily affected by the state of the speaker, and the recognition accuracy is difficult to guarantee

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