What is the principle of central locking?

[VanSarah]

The principle of central locking is: a weak radio wave is emitted from the owner's vicinity, received by the car's antenna, and the signal code is identified by the electronic control unit (ECU). The system's actuator then performs the locking and unlocking actions. This system consists of two parts: a transmitter and a receiver. The functions of central locking include: 1. Central control—when the driver locks the door next to them, all other doors are simultaneously locked. The driver can open all doors at once using the door lock switch or open a single door individually. 2. Speed control—when the vehicle reaches a certain speed, all doors automatically lock to prevent passengers from accidentally opening the doors by operating the door handles. 3. Individual control—in addition to the driver's door, separate spring lock switches are installed on the remaining doors, allowing independent control of each door's locking and unlocking.