For urban office workers, access control attendance is a product that they often deal with. It is mainly used to control the entry and exit of people and goods and ensure the safety of the company's products. At the same time, many entrance guards also have attendance functions to help companies manage the time when employees punch in.

Access control attendance products on the market mainly include anti-theft safety doors, building intercom systems, anti-theft safes, mechanical anti-theft locks, entrance and exit control devices of alarm systems, etc. The functions of these products include security, monitoring, camera shooting and attendance, etc. How to realize these functions is inseparable from the key role played by chips and discrete devices.

Take the anti-theft safety door, a typical access control attendance product, as an example, the face recognition access control system is like a guard, capturing the face outline of each step-in person in real time through the eye of a high-definition camera. It uses facial recognition algorithm to quickly process and identify the captured images and data, and opens the access control system if it is right, otherwise, it does not open it.

As a kind of security products, face recognition access control system is mainly based on computer image processing technology and biostatistics principle. The system captures face images by camera, and uses artificial intelligence algorithm to process and compare these images, thus confirming identity information. A wide range of application scenarios, including enterprises, schools, hospitals and communities, can facilitate the monitoring and management of homes and communities.

Face recognition access control system usually consists of several parts, each of which plays an important role.

The control host is responsible for coordinating and managing the work of all components. It receives the information from the face recognition terminal and decides whether to allow people to pass through the entrance gate. The face recognition terminal captures the user's face image through the camera and carries out real-time recognition. Terminals are usually equipped with high-resolution cameras and powerful processing chips, and access gate equipment is responsible for controlling the entry and exit of personnel. The common types are swing brake, wing brake and three-roller brake. The power supply system ensures the stable operation of the whole access control system, including the main power supply and the backup battery, which can provide power support when the main power supply fails to prevent the system from failing due to power failure.

Alarm system In order to further improve the safety, the system is usually equipped with an alarm device. Management software provides a comprehensive operation and management platform. There are many other kinds of auxiliary equipment products, which jointly provide diversified customization functions for the access control system.

As an indispensable key component product in the access control system, MOS and diode products can be used in power supply system, BMS and control panel, and play the role of power supply protection, voltage regulation, rectification, switching, etc., and are mainly used as protective devices in the circuit, making intelligent access control more secure and reliable.

Taking the camera module of face recognition access control system as an example, MOS is used for voltage control to ensure the voltage stability of products. In the aspect of power management, it ensures that the system can run stably and perform face recognition accurately. Diodes are used to construct switching circuits to control the opening and closing of the access control system. The face recognition door lock circuit has a power module, which is responsible for providing the DC power needed by the system, usually 12V or 24V. The power module may include components such as transformers, rectifiers, filters and voltage regulators. The face recognition module includes a camera, an image processor and a face recognition algorithm. The camera is used to capture the face image, the image processor preprocesses the image, and the control module controls the switch of the door lock according to the face recognition result. The actual door lock equipment, such as electromagnetic lock and plug lock, is used to control the opening and closing of the door. Heketai's products used in face recognition access control system include 1N4148, AO3400, MMBT3904, 2N7002 and so on.

In the future, intelligent access control will not only have the functions of identification, attendance, access control, monitoring and video recording, but also play an increasingly important role. However, discrete devices are still used as basic electronic components, and their functions are very important.