基于单片机的隐形指纹识别系统

AbstractWith the rapid development of science and technology,people's safetyconsciousness is becoming more and more strong,on the issue of privacyproperty security,put forward many solutions in many scheme,people use mostis fingerprint identification for fingerprint uniqueness and invariance for life,sogot a lot of attention and rapid development and with the development ofmobile phone screen is becoming more and more big,is bound to affect thevolume of a cell phone,more influence on the use of some experience and howto make the phone under the condition of constant volume,the screen canachieve maximum has become a serious problems in the majormanufacturers.Manufacturers put forward on this basis,the full screen,broughtthe best solution to this problem and achieve full screen one of the problems ishow to avoid the hole on the screen,the vendor and puts forward the screen ofthe fingerprint identification scheme under the screen of the fingerprintrecognition on market at present there are three main types:optical fingerprintcapacitive fingerprint recognition and fingerprint identification improved underultrasonic fingerprint screen screen proportion,to further promote thedevelopment of the full screen on real significance this article will discuss theultrasonic fingerprint identification technology and explore.This time,STM32 single-chip microcomputer will be used as the maincontrol for simulation,in order to improve the fingerprint identificationaccuracy and identification time,improve the current ultrasonic fingerprintidentification response slow and slightly insufficient accuracy of the situation inthis system,will use the algorithm by calculating the reflection time of thesound wave to form a fingerprint image,so as to achieve the purpose offingerprint identification.Key words:UltrasonicUnder glass