超声波法在电连接器接触压力测试中的应用

Application of Ultrasonic Method in Contact Stress Testing of Electric Connector

电连接器的可靠接触是通过接触件间稳定的接触压力实现的。利用超声波的传播特性,提出一种适应于接触件紧密插合结构特点的接触压力无损检测方法。设计了试验电路并进行了测试,分析了电连接器的接触压力规律。测试结果表明:不同型谱的电连接器接触压力值与接触件的结构参数相关,随插孔直径的减小,接触压力有所降低;但同一型谱的电连接器不同接触件的接触压力也存在一定的分散性。这种分散性可能成为导致接触失效的隐患之一。

The reliable contact of the electric connector is achieved through the stable contact pressure between the contacts. Based on the transmission characteristics of ultrasonic wave, a nondestructive testing method for contact pressure is proposed, which is suitable for the contacts with closely inserting structure characteristic. The testing circuit is designed and tested. Analyzing the contact pressure of the electric connector. The test results show that the contact pressure of electrical connector in different types is related to the structure parameters of the contact, and with the decrease of the diameter of the hole, the contact pressure is reduced; but the contact pressure of the electrical connector of the same type also has a certain dispersion. This dispersion may be one of the potential dangers of contact failure.