Have you ever forgotten your keys when you go out and couldn't get in in the middle of the night? Have you walked halfway to work and suddenly couldn't remember the entanglement of the door lock? After reading various reports of three-second tin foil unlocking, are you a little worried? It's time for a fingerprint lock!
I am from 16 years to use the fingerprint lock, has been used 4, because the home is the mi family's intelligent ecology, now use the mi smart door lock, today I will sort out my previous homework, see which fingerprint lock of the mi family is worth buying.
The core purchasing elements of smart fingerprint lock include three points of security, convenience and intelligence, and the following will also be expanded from these three points:
First, security
01. Lock cylinder
The security level of anti-theft lock is divided into A level, B class and C level according to national standards.
Class A lock cylinder, prevent technical opening ≥ 1 minute, anti-drilling ≥ 10 minutes, anti-saw ≥ 5 minutes, anti-pry ≥ 10 minutes, anti-pull ≥ 10 minutes, anti-impact ≥ 10 minutes.
Class B lock cylinder, prevent technical opening ≥ 5 minutes, anti-drilling ≥ 15 minutes, anti-saw ≥ 5 minutes, anti-pry ≥ 15 minutes, anti-pull ≥ 15 minutes, anti-impact ≥ 15 minutes.
C-class lock cylinder, prevent technical opening ≥ 10 minutes, anti-drilling ≥ 30 minutes, anti-saw ≥ 30 minutes, anti-pry ≥ 30 minutes, anti-pull ≥ 30 minutes, anti-impact ≥ 30 minutes.
In the past few years, the "tin foil unlocking" that is more popular on the Internet is basically aimed at the AB-level lock cylinder, which can be said to have almost no security at all, so for the fingerprint lock, the C-class lock cylinder is the most basic requirement.
02. Lock body
(1) 6068 lock body
The size of the lock body of the smart lock is a very important piece of data. Fortunately, the standard of door locks in the domestic market is relatively uniform, and there are only a few common lock bodies. The most common of them is the 6068 lock body, also known as the "universal lock body", and it is also the most convenient to replace the fingerprint lock.
Where "60" refers to the distance from the center point of the lock core hole to the side of the lock body, "68" refers to the distance between the center point of the square rod (linkage handle) hole and the center point of the lock core hole. The length of the door lock edge strip of the 6068 lock body is usually about 240mm.
(2) Overlord lock body
The Overlord lock body is a lock body derived from the 6068 lock body mentioned above, although the distance between the square rod and the lock core hole and the lock core hole and the side plate is generally 6068. But there is a big difference in the key tongue. Not only is the door lock edge strip about 388mm long, the overlord lock body also adds two lock tongues called dumb tongues (there are also hooked loop forms) than the general 6068 lock body, and the two extra lock tongues are mainly used to reverse the lock.
Overlord lock body in the versatility and the above mentioned 6068 lock body is worse, most of the smart lock manufacturers in the adaptation of the overlord lock body need to add a fee, some smart lock manufacturers for some reasons even do not support the overlord lock body, so this lock body in the purchase of smart locks when there is some disadvantages, in the purchase of need to confirm the data and charges to customer service.
(3) Wang Li lock
If your home is Wang Limen, then you have to pay attention to it alone, because Wang Li's lock body is a patented design, which is different from other lock bodies. If your original door is Wang Li lock, can't bear to eliminate and want to install fingerprint lock, generally need to modify the lock, before buying a smart lock remember to ask customer service first.
(4) Heaven and earth hook
Refers to the addition of two or more sets of locks on the upper and lower edges of the door, and increases the difficulty of being pried or brute-forced to break the door by increasing the number of lock points.
However, there should be very little violent burglary at present, right? So this function is slightly chicken ribs, the most critical is that the fingerprint lock on the market at present rarely supports the heaven and earth hook, the six models sold by mijia can not be used anyway, and the installation needs to be dismantled.
03. Anti-cat's eye unlock/child lock
A gif dynamic picture tells everyone how dangerous it is not to lock the door! The cat's eye is also easy to become an anti-theft loophole, use the vise to pull the cat's eye from the outside of the door, and reach into the iron hook to pull the door handle!
So even if the lock core is advanced, according to the barrel theory, any short board will become a loophole for anti-theft, so anti-cat's eye unlock is also a must, and now common solutions are:
(1) Design a button on the inner handle, and only by turning the door handle while pressing this button can the door open.
(2) Anti-cat's eye unlock button, after locking, you can prevent malicious unlocking;
(3) The automatic door lock is much simpler, the inner door lock part has no handle design, and the unlocking action is realized through the button.
If there are children and pets at home, it is also necessary to consider the design of child locks to avoid the danger of opening the door and singing "empty city plan" because of their misoperation.
04. Fingerprint recognition
At present, the fingerprint recognition technology of smart lock applications on the market mainly includes optical identification and semiconductor recognition.
(1) Optical identification
Collecting fingerprints with the help of optical technology is the most widely used technology, placing your finger on an optical lens, using the principle of light reflection, reflecting your fingerprint. In fact, optical technology can not only be applied to the fingerprint lock, but also the under-screen fingerprint recognition of many mobile phones on the market is based on optical principles. However, due to the low cost of the optical fingerprint recognition module and the strong adaptability, it was widely used in fingerprint locks by major smart lock manufacturers in the early days.
However, due to the weak anti-counterfeiting performance of optical fingerprint recognition, there are hidden dangers in security, especially for users with shallow fingerprints or peeling fingers, it is easy to identify errors.
(2) Semiconductor identification
In the identification sensor is set up a lot of capacitive plates, its area is the same, when the finger is attached to it to form the other side of the capacitance (inductance), due to the unevenness of the finger plane, the actual distance between the bump and the pit at the contact plate is not the same, the capacitance / inductance value formed is not the same, the device will be collected according to this principle of different values summarized, completed the fingerprint collection.
Because semiconductor sensing capture can pass through the surface layer of the skin, fingerprints basically cannot be copied and imitated, and the security performance is stronger. Moreover, semiconductor sensors, which consist of a capacitive array of tens of thousands of capacitors, can collect finer fingerprint details, which is fast and the recognition rate is extremely high.
05. Facial recognition
For the vast majority of families, the smart lock of the semiconductor recognition module has been very good to use, but there are still some scenes that are not perfect. For example, the fingerprints of the elderly and children are very challenging to the recognition rate of the fingerprint module, and the difference between the brands and models is still quite large. I don't know if anyone is like me, in the spring and autumn of each year, the fingers will "burst the skin", in this case, any fingerprint recognition module is powerless...
So during this time, the fingerprint lock has all become a password lock for me, and the use experience is greatly reduced. Reviewing the development history of smart locks is basically consistent with the technical route of mobile phone unlocking: password/gesture → fingerprint → face recognition.
In the upper part of the door lock is the face recognition module ↓
Xiaomi X's face recognition uses a 3D structured light technology route (the iPhone's Face ID uses this technology).
On the basis of infrared, an infrared dot matrix emitter is added, and the infrared IR map + depth map is used for 3D in vivo detection. Due to the depth information, it can effectively protect against flat attacks (photos, videos, bending of paper masks, etc.). So that the door lock has a very high level of security and anti-counterfeiting, Alipay brush face payment terminal, China UnionPay brush face payment and other products are used 3D structured light solutions. At the same time, it adopts a straight-in C-class lock cylinder, multiple anti-electromagnetic interference shielding layers, and is not afraid of Tesla coil (small black box) attack, so it can be assured in safety.
06. Security design
Common security systems have functions such as virtual passwords, coercive fingerprints, password trial and error alarms, visitor records, pry door alarms, high temperature alarms, door mask alarms, voice-controlled video surveillance, and so on.
The more comprehensive the security system, the more security problems the smart lock can deal with, choose more than not less.
Second, convenience
01. Unlock way
Although the smart lock is mainly based on fingerprint recognition unlocking, the rich unlocking methods can match more diverse usage scenarios and needs.
For example, the one-time password is very suitable for decoration workers to deliver installation, express / cleaning to the door to use, no longer need to toss me, directly throw a one-time password in the past, simply do not too convenient!
If it is inconvenient to have the fingerprint recognition of the elderly and children at home, it is more convenient to use the key to unlock, the key card to unlock is more applicable, or support Bluetooth/NFC to unlock the lock.
02. Unlock/Unlock scheme
The door handle structure directly determines the way to open the door, mainly three types: handle type, push-pull type and fully automatic type.
The handle type is the same as the ordinary door handle, but the fingerprint is locked at the turning place, and the general thumb is unlocked and then turned to open the door, which is more in line with the traditional use habits.
The push-pull type has a built-in motor, which actively retracts the lock pin after recognition and unlocking, eliminating the operation of turning the handle, which is more scientific and technological, and the experience is better.
The internal unlock is also a key, a push is open, directly eliminating the previous operation of pulling the handle, especially when the hands are carrying things.
03. Endurance
As an electronic product, the smart lock is mainly powered by dry batteries, generally 4-8 No. 5 batteries can last for more than 1 year, if it is too power consumption, the experience of frequent battery replacement must be very poor. High-end models also use lithium batteries for power supply, and will be equipped with an additional set of replacement batteries, such as Xiaomi face recognition smart door lock X, seamless replacement use.
Friends who have not used fingerprint locks may worry, what if the fingerprint lock is out of power? Won't you just lock me out?" In fact, it is not better than worrying, fingerprint locks are basically equipped with mechanical keys for emergency use, we must pay attention to the fact that the keys of this C-class lock cannot be matched later, so they must be properly placed.
You can also use the charging treasure to unlock the fingerprint lock after temporarily charging outside the door.
Third, intelligence
This is also a big reason why many people choose Mijia door locks, because of the rich product library of the Mijia ecological chain, the smart door locks can be built with other smart home appliances after being connected to the Mijia app, and various intelligent linkages can be realized.
For example, after the door is locked, turn on the security mode (linkage door and window sensors, flood sensors, cameras, etc.), and then the electric curtains automatically close, and the sweeping robot begins to clean the room.
After unlocking the door at home, automatically turn on the entrance light, lift the security mode, and automatically play welcome voice and music on the small love speaker.
Open your brain hole, only the unthinkable, nothing can not be done.
Understanding these basics, let's take a look at which Mijia smart fingerprint lock is worth buying:
At present, there are six smart door locks for sale in Mijia, and the parameters are shown in the following table ↓
01. Xiaomi smart door lock face recognition X
Recommendation Index: ★★★★ ☆
Reference price: 3099 yuan
I use this one myself, so I score four and a half stars, haha. As the flagship model of Mijia door lock, although the price is much higher than the other five models, the configuration is also directly full.
On the basis of fingerprint unlocking, a facial recognition unlock function has been added.
Walk to the door to automatically brush your face, extremely fast fully automatic lock body, the whole process of no sense unlocking, bringing a one-stop home experience. If it is an internal door, you don't even have to extend your hand, and you will enter the house with a push.
In fact, the main reason is that every autumn and winter, my fingers will be skinny, and the regular fingerprint lock, I really can't use it...
Infrared cameras can also capture facial information in low-light conditions, even if there is no light in the corridor, it does not affect the face recognition unlock.
A 1.39-inch AMOLED retina-grade screen is integrated into the panel to clearly display the latch status. When entering a face, according to the content displayed on the screen, with voice guidance, it can be completed smoothly.
Thanks to the built-in camera and microphone, a remote video intercom can also be initiated when the visitor presses the doorbell. Visitors can see the sound wave animation prompt on the screen.
The owner can realize remote video intercom with visitors through the small love touch screen speaker or the Mijia app.
After turning on the "real-time screen" function, you can view the dynamics outside the door in real time, and even the surveillance camera is saved.
If someone stays at the door for a long time, the video will be automatically turned on and pushed to the mobile phone Mijia app, so that you can grasp the dynamics outside the door in real time even if you are in the distance.
Children don't have to tiptoe, adults don't have to bend over, and the elderly don't have to worry about fingerprint wear, which is really suitable for everyone to unlock the lock.
Other functions will not be repeated, the other 5 models have it, there is no it, and zinc alloy frame + tempered glass panel, the appearance and texture is also first-class.
If your budget is relatively sufficient, there are elderly children at home or fingerprints like me can not be recognized, this face recognition smart lock is very suitable for you.
02. Xiaomi smart door lock E
Referral Index: ★★★★
Reference price: 899 yuan
Just recommended the flagship model, the next recommended a cost-effective model, if you are trying the fingerprint lock for the first time, you can try this, the price is less than nine hundred yuan, the cost performance is very high.
In the basic configuration is not shrunk, the security of the use of in-line C-class lock cylinder, 3D semiconductor fingerprint recognition, anti-cat's eye, anti-small black box, anti-tailing, anti-vanity password anti-peeping; classic handle design.
Support 6 unlocking methods, and support mijia APP and Apple HomeKit two sets of intelligent ecosystems, more adaptable, more playable.
03. Xiaomi smart door lock 1S
Referral Index: ★★★
Reference price: 1099 yuan
As the second cheapest model among the six models, compared to the Xiaomi smart door lock E, the following improvements have been made:
(1) Added NFC unlock function, if you use ecological devices such as Mijia mobile phones/bracelets, this function is very convenient;
(2) In terms of security design, a reminder of the door is not closed and a coercive fingerprint alarm has been added;
(3) The middle frame material has also been upgraded from aluminum alloy to zinc alloy, which is more robust and durable;
(4) The fingerprint area is upgraded to scratch-resistant sapphire.
The perception of the above upgrade is not particularly obvious, combined with the difference of 200 yuan before the Xiaomi smart door lock E, or the cost performance of E is higher.
04. Xiaomi Smart Door Lock Pro
Recommendation Index: ★★ ☆
Reference price: 1499 yuan
Equivalent to adding a camera and microphone on the basis of 1S, you can carry out real-time intercom of mobile apps and stay in front of the door to detect alarms and video recording.
But the difference of 400 yuan is changed = the improvement, in fact, a separate purchase of a video doorbell can be solved. Xiaomi's own smart doorbell is only in its early 300s, or 2K resolution.
05. Xiaomi smart door lock is fully automatic
Referral Index: ★★
Reference price: 1499 yuan
The configuration is not much different from 1S and E, the biggest difference is that it has become a fully automatic push-pull type, and the difference of 600 yuan between Xiaomi smart door lock 3 is not very worthwhile, unless you particularly like the full automatic, is to experience the next word, I recommend green rice D100, but also the last fingerprint lock I use, the appearance is more in line with my aesthetics, but also cheaper than 100.
06. Xiaomi smart door lock fully automatic Pro
Recommendation Index: ★ ☆
Reference price: 2099 yuan
If the Xiaomi smart door lock Pro is based on the Xiaomi smart door lock S because the smart doorbell function is 400 pieces more expensive, this is more exaggerated, compared to the Xiaomi smart door lock fully automatically expensive 600 pieces...
It is better to buy it than to buy a Xiaomi smart door lock fully automatic, and then buy an additional top smart doorbell, and some provinces.