Fingerprint time attendance clock only will be the original
Friday, February 1st, 2013
Fingerprint time attendance clock only will be the original entrance guard system password or IC card validation method to today’s fashion fingerprint verification mode. Let the user, in the low input, without changing its product any function and improve its performance, greatly improving the product price. 2 the fingerprint acquisition head Fingerprint acquisition head using micro prism of total reflection principle, light source from the prism reflection to the optical sensor. When people fingers on the surface of the glass, because fingerprint ridge and pressure different and change the micro prism surface; Reflection light by micro prism gain, and the amount of reflected light depends on the pressure in the glass surface fingerprint ridge and depth and skin and glass room grease. After image preprocessing, digital and gray level processing, image enhancement form the fingerprint image.
Five, the biometric time clock characteristics 5.1 safety Fingerprint invariance and uniqueness decided the fingerprint is at present the most cheap, the most reliable identification way, so using fingerprint door more safety. 5.2 accuracy According to the user as long as light fingers can timely, accurate to open the door. 5.3 high stability Independent continuous work, good stability. 5.4 flexibility Supports multiple users, many group combination to open the door,In the management of set permissions management step by step. The user’s fingerprint concentrated in the central management host to collect and store the central management host. According to the user’s access to open the door, will the user fingerprint downloading to corresponding on the door.
biometric time clock systems architecture 4.1 fingerprint entrance guard system composition See from the core products, fingerprint entrance guard system is composed of adel fingerprint processing module, user original control module, door opener and power supply system, etc. 4.2 adel fingerprint processing module description Adel fingerprint module by high performance digital signal processor DSP, large capacity FLASH and 300000 pixel color CMOS composition. Fingerprint terminal product manufacturers need not know fingerprint processing and identification of the specific principle, only need to use directly adel fingerprint module, MCU through the communication interface send instructions, fingerprint module can complete corresponding fingerprint input, fingerprint processing, refers to the spinning, validation and fingerprint comparison function.
In the time and attendance systems registration have permission to access this channel personnel fingerprint, only fingerprint verification through the into, can enter, the confidential department access to carry out strict control, ensure that materials and the security of the property. In the background will access control software user fingerprint data distribution to the corresponding door machine, still can upload real-time access records, generating entrance guard report, provide a basis for accident tracing.