STTR Phase I: Laser Ultrasonic Emission Sensor for In-process Monitoring during High-Speed Laser Welding

STTR 第一阶段：用于高速激光焊接过程中监控的激光超声波发射传感器

• 批准号: 0740241
• 负责人: Bruno Pouet
• 金额: --
• 依托单位: BOSSA NOVA TECHNOLOGIES LLC
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-01-01 至 2009-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0740241&HistoricalAwards=false
• 关键词: STTR; Phase; Laser; Ultrasonic; Emission

The Small Business Technology Transfer Research (STTR) Phase I project will demonstrate the technical feasibility for in-process monitoring of welding quality during high-speed laser welding of thin plates which is critical to manufacturing of fuel cells. The monitoring system is based on laser detection of small ultrasonic signals emitted during the welding process. The proposed technique is a modification of laser-based ultrasonic inspection. In this technique, the high-speed laser welding process is used as the ultrasonic source and a laser interferometer is used to continuously monitor the ultrasonic emission generated at the weld pool and to assess the weld quality. The proposed in-process laser welding monitoring technique is critical for the manufacturing of commercial hydrogen fuel cells to be used in the next generation of energy efficient transportation vehicles. The new in-process monitoring technique will allow to monitor weld quality in real-time, suppressing the need for post-process inspection. Other industries where laser welding of thin parts is intensively used, such as the pharmaceutical industry, could benefit from the proposed in-process sensor.

小型企业技术转移研究（STTR）第一期项目将论证在高速激光焊接薄板过程中监测焊接质量的技术可行性，这对燃料电池的制造至关重要。该监测系统是基于激光检测焊接过程中发出的小超声波信号。该技术是对激光超声检测技术的改进。该技术利用高速激光焊接过程作为超声源，利用激光干涉仪对焊缝熔池处产生的超声发射进行连续监测，并对焊缝质量进行评定。所提出的激光焊接过程监控技术对于用于下一代节能运输车辆的商用氢燃料电池的制造至关重要。新的过程监控技术将允许实时监控焊接质量，从而减少对过程后检测的需要。其他大量使用激光焊接薄件的行业，如制药行业，可以从拟议的过程中传感器中受益。