Smart Class-10 knowledge points you must know about smart locks
What is a smart lock?
Answer: the intelligent door lock is improved on the basis of the traditional mechanical lock. It has a safety, convenience and advanced composite lock. It mainly adopts the technology of password recognition, fingerprint recognition, face recognition, IC card, Bluetooth module and so on. It supports the function of Internet of things, and is connected with LAN and Internet. There are many applications of smart door locks: banks, government departments (focusing on Security), hotels, school dormitories, residential areas, villas, hotels (focusing on convenient management), etc.
What are the unlocking methods of smart lock now?
A: at present, the smart locks on the market generally have the following unlocking methods:
Biometric unlocking: fingerprint, face recognition, finger vein, metacarpal vein, iris;
Bluetooth: mobile phone Bluetooth unlock, Bluetooth button unlock;
Traditional mode: unlocking with spare mechanical key
NFC unlocking, password unlocking, remote unlocking and other methods
Do you want to leave heaven and earth hook when installing intelligent lock?
A: it is suggested to dismantle it. The application of heaven and earth hook in the family door is through the "well" shaped structure with the door frame, so that the opening side and up and down of the door are more firmly locked, but the protection between the door and the door is strengthened without technical improvement. The heaven and earth hook is only good at preventing violent door breaking. In terms of anti theft performance, the heaven and earth hook has nothing to do with the safety of the intelligent door lock. As long as the main lock body is opened, the heaven and earth hook will be opened.
In addition, there are some hidden dangers in the door lock installed with the heaven and earth hook. On the one hand, the parts of the heaven and earth hook are increased and the structure is complex, which will not only bring inconvenience during installation, but also increase the failure rate of the door lock. On the other hand, as the lock tongue increases and the force on the lock body increases exponentially, the transmission of the whole door lock will have a great burden, and the long-term loss will weaken the patience, resulting in the replacement of one in a few years. If the cost is high, it will also bring unnecessary troubles to home life.
Safe and convenient smart lock, why leave a spare key hole?
A: in 2007, the Ministry of Public Security issued the public security industry standard of the people's Republic of China General technical conditions for fingerprint anti-theft lock (ga701-2007), which pointed out that the intelligent lock must have the function of emergency unlocking: the special device specially made by the manufacturer can be used to take special methods for emergency unlocking; When the mechanical lock is used for emergency opening, the mechanical lock head shall meet the requirements of class A in GA / t73-1994. At present, there are three kinds of emergency unlocking methods of intelligent door locks in the market, namely mechanical key unlocking, dual circuit driving and password turntable unlocking. The vast majority of them use the spare key as the emergency scheme. Generally, the mechanical lock hole design of intelligent lock is relatively hidden, and it is not the main unlocking method, but only for emergency standby. It is to play a key role in preventing circuit failure, fire burnout and other emergencies.
Optical fingerprint identification and semiconductor fingerprint identification?
A: put the finger on the optical lens, and the finger is illuminated by the built-in light source and projected on the charge coupled device (CCD) with a prism, so as to form a digital multi gray-scale fingerprint image that can be processed by the algorithm of the fingerprint equipment, in which the ridge (the ridge with a certain width and direction in the fingerprint image) is black and the valley (the concave part between the ridges) is white. This is optical fingerprint technology.
Advantages: widely used, adapt to temperature variation to a certain extent, and the price is relatively low.
Disadvantages: the volume of optical fingerprint head is relatively large, and the recognition rate of excessively dry and greasy fingers will become lower.
Semiconductor fingerprint recognition is divided into capacitive and inductive. The principles of the two are similar. On a "flat plate" of thousands of semiconductor devices, the finger pastes on it to form the other side of the capacitance (inductance). Because the finger plane is uneven, the actual distance between the convex point and the concave point contacting the flat plate is different, and the value of the capacitance (inductance) is different, According to this principle, the device summarizes the different values collected and completes the fingerprint collection.
Advantages: closer to living body recognition, very high sensitivity and recognition accuracy, low power consumption and small volume of fingerprint head.
Disadvantages: the cost is relatively high and difficult to maintain.
What is vein recognition?
A: finger vein is the vein and blood vessel distributed inside human fingers. The basic principle of vein recognition is to use the structure of vein and blood vessel for identity recognition. Through near-infrared light irradiation, the image of finger vein is obtained by CCD camera, the digital image of finger vein is stored in the computer system, and the eigenvalue is stored. Due to the applicability of the scene, finger vein recognition is generally used in family security (the recognition module of palm vein is too large, and the recognition speed is reduced due to the large area, which saves more vein information), which is convenient for lock design and faster recognition speed.
What are mechanical lock body and electronic lock body?
Answer: the lock body of intelligent lock can be divided into mechanical lock body, electronic lock body and mechanical lock body according to whether there is an electronic part. The lock body has no electronic part, which is a simple mechanical structure, which is no different from the ordinary mechanical lock body. For the convenience of production and installation, manufacturers often adopt the through-hole design.
Mechanical intelligent integrated lock body is a lock body combining intelligence and machinery. The most remarkable feature is that it drags a small tail (data line) and needs to be connected to the inner panel. The working principle of the lock body is to control whether the mechanism inside the lock body is combined with the square shaft through the intelligent system to achieve the purpose of opening the door. In other words, the lock body is designed with two internal and external square shafts, and both internal and external square shafts are combined with the handle. Users need to control the combination of the square shaft and the lock body to open the door. Therefore, no matter how you rotate the square shaft outside the door without proper authorization, the door will not open.
What are the communication modes of intelligent lock? The characteristics are:??
A: the commonly used network protocols now include WiFi, Bluetooth, ZigBee, Z-Wave, etc.
WiFi has high power consumption and is suitable for transmitting a large amount of data; Bluetooth power consumption is relatively low; ZigBee technology is complex and its R & D cost is high; The Danish zenwave alliance is not strong yet. There is also a new intelligent door lock communication protocol, namely NB IOT. Compared with ordinary smart door locks, Nb IOT smart door locks have longer standby time, no gateway, better network stability and more complete security environment. Perhaps, it will become a main direction in the field of smart door lock and even smart home in the future.
How do you know if your door can be equipped with a smart lock?
A: there are many kinds of lock body specifications of the door lock. Similarly, the smart lock will also be designed considering most of the lock body specifications in the market. Generally, the smart lock can be installed without changing the door, except for a few special or foreign lock bodies. However, it can also be installed by changing the hole of the door. As long as you want to install the smart lock, you can communicate with the merchant, and the merchant and universal installer will help you. In terms of materials, smart locks can be installed on wooden doors, iron doors, copper doors, composite doors and anti-theft doors. Even glass doors used by the company can use smart locks.
What is the best way to maintain the smart lock?
Answer: in the process of using the smart lock, we must pay attention to the product maintenance. There are many precautions, such as: unprofessional disassembly is prohibited; Don't slam the door; Wipe the acquisition window with a dry soft cloth to prevent scratching; Keep away from water to prevent water from entering; Keep away from corrosive substances; Do not hang heavy objects on the door handle; When the spare key in and out switch is not sensitive, do not add lubricating oil randomly to prevent dust from entering; Check the lock regularly and replace the alkaline battery in time.