What is a fingerprint lock?

Fingerprint refers to the uneven lines on the front skin at the end of the finger. Although fingerprints are only a small part of human skin, they contain a lot of information. These lines are different in patterns, breakpoints and intersections. In information processing, they are called "features". It has been proved in medicine that these characteristics of each finger are different and unique and permanent. Therefore, we can associate a person with his fingerprints. By comparing his fingerprint characteristics with the pre-stored fingerprints,

Automatic fingerprint identification system (AFIS) collects, analyzes and compares living fingerprints through special photoelectric conversion equipment and computer image processing technology, which can automatically, quickly and accurately identify personal identity. Generally can be divided into "offline part" and "online part". The main steps of the off-line part are to collect fingerprints with a fingerprint collector, extract detail points, and save the detail points in the database to form a fingerprint template library. The online part includes collecting fingerprints with a fingerprint collector, extracting minutiae, and then matching these minutiae with template minutiae stored in the database to judge whether the input minutiae and template minutiae come from the fingerprint of the same finger.

Fingerprint lock is a security product that combines electronic components and mechanical components accurately by using the above principles.

Disadvantages of fingerprint lock:

Fingerprint lock mainly determines the identity by identifying fingerprints, but the fingerprint capacity is limited. Endurance, mechanical opening and mutual opening rate are all key technical problems!

Problems needing attention when buying

Fingerprint lock is a new industry in China. Due to the problems of technology and market acceptance, the price of fingerprint lock has been high at present (like many new products, such as mp3, if you are a fashionista and want a high-quality life, you can use fingerprint lock. After all, everyone may use it in a few years, so it won't be expensive. Of course this is beside the point). At present, there are many kinds of fingerprint locks on the market, but not many are really stable. Many manufacturers only produce several fingerprint locks by the way, which is not only not guaranteed after sale, but also the production process is not rigorous enough.

With my meager experience, fingerprint locks on the market can be divided into three grades:

1), there are basically no branded products: as mentioned above, these products are just assembled by some small factories or workshops to buy some cheap original accessories.

2) Mid-range products: The manufacturers of such products often have a certain scale and strength, and their production technology has also been greatly improved, but generally there is no patented technology.

3) High-end products: The manufacturers of such products are generally well-known enterprises in the domestic fingerprint lock industry (there is no absolute leading enterprise in the fingerprint lock industry at present), which has certain guarantee in product stability and after-sales service. Of course, such products are often considered as high-end fingerprint locks.

Of course, the more expensive the fingerprint lock, the better. When buying a fingerprint lock, you should generally pay attention to "safety, universality and stability". Specific to the product:

1, rejection rate and misidentification rate

Misidentification rate: In fact, it refers to "an unsaved fingerprint can open the fingerprint lock". This situation was unheard of when I was still in the fingerprint lock industry. Generally, fingerprint locks can reach practical standards.

Rejection rate: refers to "you can't open the fingerprint lock for a correct fingerprint according to the correct operation method", which should be paid attention to when buying a lock. At present, the rejection rate of locks on the market is below 0.5%- 1%, but the data is only data, so you must demonstrate it with your own fingers several times when buying.

2. Intelligence

People who buy fingerprint locks generally value its safety and fashion intelligence. Generally, high-end fingerprint locks are equipped with LCD screens, which can be used to view the "fingerprint records and unlocking records" stored in the system.

3. Universality

At present, we haven't seen any manufacturer producing "security door with fingerprint lock". When the door and lock are purchased separately, it is very troublesome if the purchased lock cannot be installed on the door, so it is necessary to pay attention to whether the lock body meets the opening standard of the security door when purchasing.

4. Power consumption: When buying a lock, I can't teach you how to identify the problem of power consumption, but power consumption is indeed an important criterion for judging the quality of a lock.

The words of dissidents

Please don't make public under fame and fortune. My personal views are as follows!

The above entrance is reasonable, but personally, it is beneficial to the company without using users. There is a typical company self-promotion.

1, the rejection rate is inversely proportional to the misidentification rate. It is not accurate when marked, and it cannot be tried. Professional testing and calculation are needed, which is also related to the quality of products.

2. Intelligent misunderstanding: the standard of high-end locks is not LCD screen, but technical content and quality. Most use cases in home use do not need to be recorded by opening the door, and it is unnecessary to read or not;

3. Universal misunderstanding: The doorway itself is opened by people. If the purchased lock is smaller than the original door opening, it will not be installed. But in general, the opening of fingerprint lock will be larger than that of general mechanical lock, and it can be installed by modifying the hole. In addition, if you contact the door factory in advance when you buy the door, everything is not a problem.

4. Misunderstanding of power consumption: Power consumption depends on the number of doors opened and the average power consumption. Under normal circumstances, the regular manufacturer's product10-65438+can use 4 LR6 1.5V batteries in February; If the door is opened hundreds or thousands times a day, the service life of the lock will be shortened, not to mention the battery life will be reduced.

I touched the fingerprint lock. It should be said that it is not less. For users, many parameters are sometimes the cover of the merchant:

1, false rejection rate and false recognition rate are indeed two standards of fingerprint technology, but the problem is that no one can verify the truth of this parameter. If problems can be found only through pre-purchase testing, can businesses still use them to mix? Even this parameter, many businesses themselves are nonsense. The so-called standards of 1% and110000 are not enforced by the state. For example, the resolution of the fingerprint head will be marked as 500DPI by several professional fingerprint lock companies in the industry, and other rising stars will follow suit. Can you tell who is real? A better company may also mark it as 500DPI or even 508DPI (in fact, there is no such thing as 508DPI and 5 10DPI). Can you trust a company that can change these basic parameters at will?

2. Fancy functions: I have personally seen many manufacturers integrate ten or twenty functions such as doorbell and voice prompt on their products. At first glance, users have many functions, which seem to save other unnecessary expenses and may be tempted. Personally, I think this is the irresponsible design of the manufacturer. The main function of fingerprint lock is safety and convenience: safety is that others can't copy the key to open the door, and convenience is that you don't need to bring the key. Under this premise, our first priority is to stabilize the product quality, and it is possible to open the door normally only if the product functions normally. If there is something wrong with the product, the head of the household can't open it himself, which is inconvenient. Everyone knows that the complexity of functions will inevitably lead to more structures, and the more structures, the greater the possibility of problems. At the very least, the auxiliary function will increase the frequency of battery replacement, and frequent battery replacement will reduce the service life of the battery box. Who can guarantee that his products will never go wrong? I believe not! What we can do is to make as few problems as possible.

To make a long story short, I think choosing a fingerprint lock depends on the following indicators:

1, manufacturer/brand:

This is the key point of choosing fingerprint lock. The manufacturer's production quality is guaranteed, and users can rest assured; Only when the manufacturer has after-sales guarantee can someone solve the problem in time (there is nothing wrong with the product, so don't think that what you buy will not be bad); Only when the quality and after-sales of manufacturers are guaranteed can users not be locked out.

How to choose a manufacturer, every manufacturer will say how good he is, or everyone may say that he is a famous brand and so on. The author suggests the following:

A. Professional level of manufacturers: Under normal circumstances, professional lock-making enterprises take locks as their life, or they will die if they fail to do well. He must do a good job in the quality of locks;

B. Manufacturer's history: An enterprise has been locked for 20 years or 20 years, but it can still survive, and the bigger it gets, the better the product will not be (we can't say it is the best, because there may be better). This history refers to the history of making locks. Don't choose those who see profits squeeze in and share a glass of water halfway. These people can retreat if they collapse. Just like when people talk about computers, they think of IBM, Dell and Lenovo, because they are professional, large-scale, historical and accumulated. (Lenovo's mobile phone is not very good, because Nokia and MOTO, he squeezed in. Lenovo can sell the mobile phone business and still be his computer, but if Nokia can't do it well, it will have to close the door.

C, the size and strength of the manufacturers: Everyone says that they are of good quality and they are the most professional. Who do you trust? Generally, large-scale and professional lock-making enterprises can survive for decades, and their products have been tested by the market and can be trusted.

D. Product type of the manufacturer: If a lock factory only has one or two locks, it will still have one or two locks after two or three years, which should have no impact. A powerful enterprise often has a dozen or even dozens of fingerprint locks, because the needs of different users may be different, and he will have at least a dozen models in the course of ten years. Companies with only a few locks tend to be younger.

E. After-sales service ability of manufacturers: If a manufacturer can establish its direct sales service system in all the capital cities of China, then his after-sales service ability will not be bad. The after-sales service mentioned here is not his dealer, and it is impossible for a dealer to grasp the core of the manufacturer. The after-sales service system of the manufacturer and his dealer service can provide you with the best after-sales. To say the least, his dealer may not do it next year. You may find a manufacturer.

If the above five points are appropriate, the strength of this company is generally acceptable. In addition, for convenience and reference, users can refer to the history of fingerprint locks: the first fingerprint lock listed in the world was in 2000, and the first fingerprint lock listed in China was in 200 1 year, so as to understand the working history of a lock factory. In order to avoid advertising, it is not recommended here. Personally, I know that there is a lock-making enterprise in Guangdong province for more than ten years, which is still good. You should choose carefully. )

2. Function:

Choosing the function of the lock, on the one hand, is to meet your own needs, on the other hand, it is also related to the quality of the lock. Good companies often have more than a dozen fingerprint locks for users to choose from. Users usually choose to use their own products: some are used for entrance doors, which are divided into metal doors and wooden doors, and some are used for users' indoor doors, mostly wooden doors. Commonly used basic functions are:

A, many people can use fingerprints to open the door (there are often more than one or two people in a home or office), and the product quality should be stable and the performance should be good;

B, can use different permissions to open the door (householders can't have the same management authority as nannies and cleaners).

C, can freely increase or decrease the fingerprint of the door (nanny can easily remove her fingerprint when she leaves)

D, bring some password functions appropriately (this part is actually unnecessary, because fingerprints are already very safe to open the door, but after all, fingerprints are electronic parts. If the door is broken, the householder can open the door with a password (the password number cannot be less than 9 digits). Try not to choose products that highlight the password function too much. After all, passwords are not as secure as fingerprints. There are usually two keys, the former can be used and the latter has more key codes. Try not to open the door with a password in daily life, which can effectively avoid being stolen and don't worry about the password being cracked. If someone wants to try the four-key password of 1 1, they will.

E, be sure to bring the mechanical key. This is an alternate way to open the door. Like airplanes and cars, although they have automatic control status, they still retain the manual control part. This is for security reasons.

Any electronic part is likely to make mistakes, and the mechanical part is much more stable. As a backup way to open the door at home, the mechanical key with the lock can open the door in time when the electronic part of the door lock breaks down, which is convenient for maintenance. Imagine what would you do if there was a fire in your house, or if a thief damaged the electronic part of your house because he didn't pry open the lock? Don't covet the so-called psychological safety, regardless of the back road, choose a door lock without a mechanical key.

F, choose a good lock cylinder. The quality of the lock core is directly related to the prying resistance and stability of your door. This part is also very important. No matter how good the fingerprint lock is, it is still inseparable from the lock core. The publicity in the market is always fair and reasonable, and the woman says that the woman is right. It is best to refer to how to choose manufacturers, choose good manufacturers and listen to them.

G, it is best not to use other fancy functions. Basically not practical. One more function is easier to break down. If the product is broken, you won't repair it. If you repair it, the maintenance staff will charge you for it (on-site service is not free).

3. Style: As for the choice of lock style, everyone has his own preferences, and this part is inconclusive. Generally speaking, it depends on the material, shape and color. At present, the lock materials on the market are mainly stainless steel and zinc alloy, as well as aluminum alloy and plastic. How to enter the door must choose stainless steel or zinc alloy. If it is an indoor door such as a bedroom, it doesn't matter. The above is only the author's personal experience over the years, providing dinner for readers! Hope to be a reference!