Impact mechanism of vibration on Board to Board Connector
In a vibration environment, Board to Board Connector will be affected by multiple forces. The first is the periodic acceleration force, which may cause relative displacement between the connector pin and the interface. When the pin repeatedly rubs against the interface wall during vibration, the plating on the pin surface may be worn, affecting its conductivity. In addition, the force generated by vibration may also change the contact pressure inside the connector. If the contact pressure is reduced to a certain extent, the contact resistance will increase, resulting in attenuation or interruption of signal transmission. In addition, long-term vibration may loosen the fixing structure of the connector, further aggravating the displacement and poor contact of the pin, seriously affecting the normal operation of the connector.
Key factors affecting reliability
The structural design of the connector is one of the key factors affecting its reliability in a vibration environment. For example, the length, diameter and elastic design of the pin will determine its stability in vibration. Shorter pins with suitable diameter and good elasticity are less likely to be excessively displaced during vibration. The shell material and fixing method of the connector are also important. High-strength and high-toughness shell materials can better resist the external forces generated by vibration, and a stable fixing method can reduce the possibility of loosening. In addition, the design of the contact point, such as the contact area and contact form, affects the change of contact resistance under vibration. A larger contact area and a more reasonable contact form help maintain a stable electrical connection.
Reliability evaluation methods and indicators
To evaluate the reliability of Board to Board Connector in a vibration environment, a variety of methods and indicators need to be combined. The actual vibration environment can be simulated by a vibration test bench, and the electrical performance of the connector can be tested under different vibration frequencies, amplitudes and durations, such as measuring contact resistance and bit error rate of signal transmission. At the same time, observe the changes in the appearance of the connector and check whether the pins are worn or loose. Reliability indicators include the time the connector can maintain normal electrical performance under specified vibration conditions, the maximum allowable contact resistance change value, and the degree of signal transmission quality degradation. These indicators can quantitatively reflect the reliability level of the connector in a vibration environment.
Measures to improve reliability
To improve the reliability of Board to Board Connector in a vibration environment, multiple aspects can be taken. In the design stage, optimize the structure of the connector and add anti-vibration design, such as using elastic buffer structure to absorb vibration energy and reduce the impact on pins and contact points. When choosing the right material, you should not only consider its electrical properties, but also pay attention to the mechanical properties and wear resistance of the material. During the installation process, ensure that the connector is correctly installed and firmly fixed to avoid additional vibration problems caused by improper installation. In addition, regularly inspect and maintain connectors used in vibration environments to promptly detect and deal with potential reliability problems and extend their service life.
