Publish Time: 2019-08-30 Origin: Site
In modern cars, there are a lot of car wiring harnesses, and the electronic control system is closely related to the wire harness. Someone once used an image metaphor: If the functions of the microcomputer, the sensor and the actuator are compared to the human body, it can be said that the microcomputer is equivalent to the human brain, the sensor is equivalent to the sensory organ, the actuator is equivalent to the moving organ, and the harness is the nerve and the blood vessel. Then, the connector is the body that connects the blood vessels to the body.
Protection of car alarm system
Connector way
Connector selection method
The car anti-theft system is a system designed to prevent theft of the car itself or the items on the car. It consists of an electronically controlled remote control or key, electronic control circuitry, alarms and actuators. The earliest car door locks were mechanical door locks, which were only used to prevent the door from opening automatically when the car was running, and only had an accidental effect. With the advancement of society, the development of science and technology, and the increasing number of car ownership, the doors and doors of cars and trucks that were later manufactured were equipped with key locks. This kind of door lock only controls one door, and the other doors are opened or locked by the door lock button on the inner door.
The selection of the connector needs to ensure good contact with the electrical components, minimize contact resistance and ensure electrical reliability. The contact methods of the connectors are mainly Wire to wire connectors, Wire to board connectors, Board to board connectors.
l Wire to wire connectors refers to the way in which electrical connections are made between wires;
l Wire to board connectors refers to the connection of wires to equipment;
l Board to board connectors refers to the input connection to the outside of the device. Commonly, there is a PCB board connection and an electrical equipment end connection.
For different connection methods, how to choose the appropriate connector, should first make a preliminary judgment on the basic performance of the connection according to the application environment, consider the installation environment such as vehicle cabin and cockpit, low pressure and high pressure, dry and wet, and within the hub At the through hole of the body, the connector of the connector, the waterproof plug, the locking and interlocking structure of the connector, the fixing buckle and the like are selected for the above requirements.
For the performance requirements of the connector and the matching terminal, it is necessary to further filter the cross-sectional area of the wire and the current passing through. The current that can be carried by the connector of different specifications can be judged according to the conventional: the width of the terminal is 0.64-1, the load is 10A; the width is 2.2. -2.8 carrying current 20A; width 4.8 carrying 30A; width 6.0-6.3 carrying 45A; width 7.8-9.5 carrying 60A; terminal carrying current usually needs to be matched with wire diameter, if too large terminal is selected and the wire diameter will not match Cause too much voltage drop; if too small terminals and wire diameter are selected, the contact resistance is too large, and the temperature rise will quickly cause the connector to ablate.
More use in cars is wire-to-wire connectors, sometimes using board-to-board connectors or board-to-wire connectors. These connectors play an important role in the car's system and are a core element of the anti-theft system.