Is the fingerprint recognition of the smart lock reliable?

Is the fingerprint recognition of the smart lock reliable?



Smart locks also have many names: fingerprint locks and electronic locks. Fingerprint recognition is the core function of the smart lock. The following is a brief analysis of the fingerprint recognition module of the smart lock.
 
Fingerprint recognition is to collect human fingerprint information when people’s fingers touch the fingerprint recognition device, then digitize the fingerprint information, and compare it with the fingerprint you entered in advance. Finally, the comparison feedback information is output.
 
Types of fingerprint recognition technology:
 
1. Optical fingerprint recognition.
 
This is to use the principle of light reflection to reflect your fingerprints. The cost is very cheap, and the recognition has been greatly affected. Dirty and wet hands are difficult to identify, and there is a risk of being swiped by fake fingerprints in this way. This technology is not only applied to punch card machines and fingerprint locks. The fingerprint recognition under the screen of many mobile phones now uses optical principles.
 
The characteristics of optical fingerprint recognition: low price, low accuracy and low security.
 
2. Semiconductor fingerprint recognition.
 
It is also called capacitive recognition and live fingerprint recognition. The principle is that a large number of capacitive plates are set on the identification sensor, and the areas of these capacitive plates are all the same. When the user presses the receiver on the sensor, the skin surface corresponds to these capacitor plates, so a complete flat capacitor is formed. Because the fingerprint has raised ridges (fingerprint protrusions) and recessed ridges (fingerprints) Depressed part). Therefore, the distance between the two plates of each capacitor is not the same. As a result, the size of each capacitor is different. The capacitive fingerprint sensor acquires fingerprint information by detecting the difference in the size of the coupling capacitance caused by the difference in the distance between the contact with the fingerprint on the capacitance.
 
Features of semiconductor fingerprint recognition technology: high accuracy and strong security.

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