|
|
|
| Application of Ultrasonic Method in Contact Stress Testing of Electric Connector |
| LUO Yan-yan1,FENG Yu-zhu1,HAO Liang2,LIU Xin-hao1,LIU Shuo1 |
1.Province Ministry Joint Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability,School of Electrical Engineering, Hebei University of Technology, Tianjin 300130, China
2.State Grid (Company of China), Beijing Electric Power Company, Beijing 100031, China |
|
|
|
|
Abstract 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.
|
|
Received: 14 November 2016
Published: 29 December 2017
|
|
|
|
|
|
［1］李志博,朱玛,张高峰.ANSYS在电连接器温升分析中的应用［J］.计算机应用与软件,2011,28(5):89-92.
［2］苏竣,王其平.硫化氢气氛对电连接器接触可靠性的影响［J］.低压电器,1991,(1):16-19.
［3］周齐祥.连接器的接触压力及其检测［J］.机电元件,1985,(2):60-70.
［4］毛毳,王世斌,佟景伟,等.一种新型的接触压力传感器［J］.实验力学,1999,14(2):251-255.
［5］李淑清.连接器中接触压力和变形的机械特性的确定［J］.机电元件,1982,(1):46-57.
［6］郑小平,廖延彪.用于压力、温度测量的光纤传感器［J］.清华大学学报( 自然科学版) ,2000,40(7):74-76.
［7］Blumenroth F, Lbl H, GroＢmann S, et al. Influence of Stress Relaxation and Sliding on Long Time Behaviour of Plug — In Power Connectors with Helical Springs ［C］//24th International Conference on Electrical Contacts (ICEC). 2008: 368-373.
［8］苏竣,王其平.电连接器接触压力的测量和磨损蜕变模型［J］. 低压电器,1993,(1):15-18.
［9］申洪苗,马希直. 油膜厚度超声测量方法及实验研究［J］. 计量学报,2014,35(1): 25-29.
［10］方敏, 徐科军,;汪伟,等. 基于FPGA和DSP的气体超声流量计驱动和数字信号处理系统［J］. 计量学报,2017,38(2): 200-204.
［11］中国机械工程学会无损检测分会. 超声波检测［M］.北京:机械工业出版社,2011.
［12］刘凡. 基于传播声时的LCR波切向应力测量系统实验研究［D］.成都:电子科技大学,2006.
［13］贺玲凤,刘军.声弹性技术［M］.北京:科学出版社,2002. 94-109.
［14］Hughes D S. Ultrasonic velocity in an elastic solid［J］. Applied Physics,1950,21(3): 294-301.
［15］佘玉芳. 机电元件技术手册［M］. 北京:电子工业出版社,1992.169-171. |
|
|
|
2018, Vol. 39 
