SBIR Phase I: Real Time Ultrasonic Control of Bolt Tightening

这个小型企业创新研究(SBIR)第一阶段项目将使用一种可变的、应力相关的波速算法，开发螺栓组件紧固的实时超声波控制。现有技术使用超声波测量来验证紧固件的拉力，方法是测量紧固件在拧紧后的伸长率，而不考虑控制算法中包含的波的变化速度。该项目将确定固体中的声波速度和应力水平相关性，开发一种根据紧固件长度改变波速的算法，将超声波设备和新算法集成到组装工具中，并评估列表应力系数在超声波测量中的有效性。该项目产生的更广泛的影响将是改善乘用车和卡车的运输安全，可以看到，HIS可以通过减少停机时间和与故障机器和产品相关的保修成本来提高生产率，从而帮助美国经济和当地经济。对许多行业、航空航天、交通系统、核能和化石发电厂以及汽车行业都有重大好处。

This Small Business Innovation Research (SBIR) Phase I project will develop real-time ultrasonic control of the tightening of bolted assemblies, using a varying, stress-dependent, wave speed algorithm. Existing technology uses ultrasonic measurement to verify the fastener tensile force by measuring its elongations after it has been tightened and disregards the wave varying speed, included in our control algorithm. The project will determine the sound wave speed and the stress level correlation in solids, developing an algorithm to vary the wave speed according to fastener elongation, integrating the ultrasonic device and the new algorithm into the assembly tool, and assessing the validity of the tabulated stress factor in ultrasonic measurements. The broader impacts resulting from this project will be improvement in the transportation safety of passenger cars and trucks, it is seen that his could help the U.S. economy and local economy by increasing productivity through reduced downtime and warranty costs associated with failed machines and products. Significant benefits to many industries, the aerospace, transportation systems, nuclear and fossil power generation plants as well as the automotive industry.