How does the electronic sensor lock work?

Induction locks have developed to a certain extent in European and American countries, and have long been an indicator of the quality of life and life. However, the development of China's sensor locks is still in its infancy, especially for some sensor lock brand products. Its technology has not yet matured to maturity. With the continuous deepening of China's opening up to the outside world, high-end buildings are developing rapidly, and the prospects of high-end locks market are optimistic. . China's lock industry's investment in high-tech locks is increasing year by year, and the market demand for high-end locks is increasing year by year. The following is the principle of electronic induction lock.

Electronic induction lock principle

There is a coil inside the smart door lock sensor, which is always oscillating, which is equivalent to the primary coil of the transformer. There is also a coil in the card, which is equivalent to the secondary coil of the transformer. When the two coils are close, the coupling generates current and supplies power to the card. At the same time, the past inquiry signal is coupled, the card is answered, and the door is opened according to the condition.

Is the induction lock OK?

Now in the upscale apartment, we can already see the trace of inductive IC card (also known as non-contact IC card). Inductive IC card technology is developing rapidly. A new generation of intelligent electronic door lock based on inductive IC card technology is also available. It came into being. Since the inductive intelligent electronic door lock has no mechanical contact during use and does not generate friction, the wear of the induction card and the intelligent electronic door lock can be reduced, and the failure rate of the intelligent electronic door lock can be reduced.

In terms of security, it is necessary to prevent the card from being illegally copied and unlocked in an abnormal manner (such as tool dialing, smashing, sucking with a strong magnet, etc.), and the lock body should have a certain ability to resist external damage. In order to prevent the proximity of the proximity card, each sensor card is usually encrypted before it leaves the factory. Different users use different passwords. The card issuance management software is also protected by a password to prevent unauthorized persons from using the card issuing management software to illegally manufacture the card. Due to the three-lock anti-lock cylinder, when the laboratory door is closed, the anti-dial lock is pressed by the door frame, and the main lock is automatically locked, and cannot be opened or opened by the tool. In addition, the clutch mechanism driven by the motor has the function of preventing the strong magnet from being sucked, and the front lock body does not have any nails exposed on the lock body, and the tamper can be removed.

The reliability of the inductive intelligent electronic door lock system is also very important. At present, the comprehensive reliability of the system can be improved by both hardware design and software design. In terms of hardware, the selected main processor PIC16F73 has high anti-interference ability. It contains a “Watchdog (WDT)” circuit with independent RC oscillator, which can automatically reset and restore the CPU when the program runs. Normal operation; hardware write protection for EEPROM storing important data to avoid data loss when it is interfered; use patch components as much as possible, strictly perform aging screening to ensure component quality; in PCB wiring, take a series of measures to improve resistance Interference ability.

The reason why the induction lock brand products have a popularization trend is because the induction lock products are compared with other mechanical locks: high security, high portability, and strong anti-theft. Moreover, sensor locks have become a symbol of high quality of life. Now, as long as the market is dominated by high-end foreign brands and low-end domestic brands. Relative to consumers, sensory locks are similar to luxury goods, and the awareness of sensor locks is not high enough, and it is generally in the stage of education. In the market popularization, most of the sensor lock brands are focused on engineering projects, and there is still a huge space like the traditional mechanical lock retail market. By visiting major building materials markets, hardware markets, hardware stores, etc., you can find that the mechanical locks still play the leading role. The induction locks are only sporadic in some high-end building materials centers. The need for universalization has not yet been stimulated, giving many investors the opportunity to enter the induction lock brand. The key to grasping the business opportunity is that the price requirements of the induction lock and the mechanical lock are different: the induction lock is generally more expensive than the mechanical lock, which is undoubtedly a barrier that hinders the development of the induction lock. However, the trend of universalization of inductive locks is irreversible.