弹片连接的弱力接触电阻测试与分析

Measurement and analysis of the contact resistance of the weak force of the spring connection

摘要:

弹片作为一种重要的电连接器，它的可靠性会直接影响设备的电性能。研究弹片电连接的规律和影响因素，对于提升设备性能并节约成本具有重要意义。本文通过软件仿真及实验测量，测试了在弱外加力(<2 N)的条件下，以弹片为代表的电连接部件，接触电阻阻值随着接触金属面材料的电阻率减小而减小，且随着外加力的增大而减小的规律。通过机械接触理论分析及计算，验证了接触电阻会受到材料的电阻率与外加力影响；对弹片的接触电阻产生机理给出了明确解释，能够更准确地判断弹片与不同接触界面产生接触电阻的大小关系。

Abstract:

As an important electrical connector, the reliability of spring electrical connection directly affects the electrical performance of the device. It is important to study the regularity and influencing factors of spring electrical connection for improving equipment performance and saving cost. In this paper, through software simulation and experimental measurements, the rule is tested that the contact resistance decreases with the decrease of the resistivity of the contact metal surface material and decreases with the increase of the applied force when the electrical connection parts represented by the spring are under weak external force(<2N). Through the analysis and calculation of mechanical contact theory, it is verified that the contact resistance is affected by the resistivity and external force of the material. The mechanism of contact resistance of the projectile is clearly explained, and the relationship between contact resistance of the projectile and different contact interfaces can be more accurately judged.