SBIR Phase I: Real Time Ultrasonic Control of Bolt Tightening

这个小型企业创新研究（SBIR）第一阶段项目将开发螺栓组件拧紧的实时超声波控制，使用变化的，应力相关的，波速算法。现有技术使用超声波测量来验证紧固件的张力，通过测量紧固件被拧紧后的伸长量来验证紧固件的张力，并且忽略了波的变化速度，包括在我们的控制算法中。该项目将确定固体中的声波速度和应力水平相关性，开发一种算法，根据紧固件的伸长率改变波速，将超声波设备和新算法集成到装配工具中，并评估超声波测量中表列应力因子的有效性。该项目产生的更广泛的影响将是改善乘用汽车和卡车的运输安全，可以看到，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，可以帮助美国经济和当地经济。对许多行业都有显著的好处，航空航天，运输系统，核电和化石发电厂以及汽车行业。

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.