Design Of Door Access Control System Based On Voiceprint Recognition

Voiceprint recognition technology which has high safety and portability can automatically recognize the identity of the speaker,according to speaker information contained in speech waveform.With the development of voiceprint recognition technology,it has been applied to bank and financial field.At present,door access control system based on passwords and entrance cards are common in the market.Near Field Communication(NFC)is adopted in most of cards access system.However,the NFC chip has some congenital problems,such as easily be replicated and lost.As to passwords access,it can just be controlled by one-way,and the security is too low.In response to these issues,with the voiceprint recognition technology,this paper designed an access control system based on voiceprint recognition.Hardware circuit takes STM32F407 as the core,and software of controller is based on the real-time operating system uC/OS-III.Speech information can be uploaded to server through smartphone or the local module to verify.It offers multiple choices for users.Communicating with wifi module by transparent transmission,the server can authenticate via speech and voiceprint feature.Additionally,state information of access control system is recorded in back-stage management.The main contents of this paper are as follows:1.According to system resource demand,the hardware circuits are designed using STM32F407 as CPU.2.The embedded system uC/OS-? was transplanted to STM32F407,also verify in this system.On this field,the module programs were fulfilled.3.The client software program on cell phone and server are also designed.This access control system has been successfully installed in a corporation and the recording is considered as a document for attendance.The results show that this access control system designed reasonable and satisfied applied requirement,and the performance meet application requirements.