PCB Assembly of Car Remote Control System

      The basic principle of the car remote control key: a weak radio wave is emitted from the car owner, the radio signal is received by the car antenna, the signal code is identified by the electronic controller ECU, and then the actuator (motor or electromagnetic management ring) of the system performs the opening/closing. action. The following is the specific introduction:

1. The system is mainly composed of transmitter and receiver.

2. Transmitter: It consists of transmitting switch, transmitting antenna (keyboard), integrated circuit, etc.

3. Receiver: After the transmitter uses short-wave modulation to send out the identification code, it receives it through the short-wave antenna of the car, and uses the distributor to enter the short-wave high-frequency amplifier processor of the receiver electronic control unit for demodulation.

The principle of automobile smart key is mainly composed of two parts: transmitter and receiver. It is initiated by the battery and emitted from the key to a smaller radio wave. Then the car antenna receives the radio wave signal sent by the key. Code, then the system's actuator (motor or electromagnetic manager circle) performs the movement/atresia action.

Basic principle of car remote control key: emit a weak radio wave from the car owner, receive the radio signal by the car antenna, the electronic controller ECU identifies signal code, and then the system's actuator (motor or electromagnetic manager circle) executes the opening/atresia. action. The system is mainly composed of the transmitter and receiver: 1. The transmitter transmitter consists of a transmitting switch, a launch antenna (keyboard), and an integrated circuit. It is integrated with the signal sending circuit on the keyboard. From identifying code storage circuits to FSK modulation circuit, which smallization is used to use a single -chip integrated circuit, the opposite side of the circuit is equipped with a lithium -type lithium battery. The transmitting frequency is selected according to the country's radio waves. Generally, 27, 40, and 62MHz can be used. The transmitton switch is sent at a time at a time. 2. The receiver transmitter uses the FM modulation to send an identification code, receive it through the FM antenna of the car, and use the distributioner to enter the FM high -frequency increase processor of the receiver ECU for demodulation. ; If it is the correct code, enter the control circuit and make the actuator working. Working method: 1. Folding passive working method. When the owner enters the inductive area of the key system, as long as the door handles are touched and the door handles are handed down, the identity recognition "key" will receive the low -frequency signal sent by the car. If this signal and "key" will be received. The identification information saved in the middle is consistent, and the "key" will be awakened. "Key" will analyze the authentication password issued by the car and send the corresponding signal after being awakened. These signals are encrypted to improve security. The car will compare the receiving signal and the information saved inside the car. If the verification is passed, the car will open the door lock. Once the driver enters the car, you only need to simply press the start -up key, and the car engine will start.

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