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）第一阶段项目将展示薄板高速激光焊接过程中焊接质量监控的技术可行性，这对于燃料电池的制造至关重要。该监控系统基于激光检测焊接过程中发出的小超声波信号。所提出的技术是基于激光的超声波检测的改进。在该技术中，高速激光焊接过程被用作超声波源，激光干涉仪用于连续监测焊池处产生的超声波发射并评估焊接质量。所提出的过程中激光焊接监控技术对于制造用于下一代节能运输车辆的商用氢燃料电池至关重要。新的过程监控技术将能够实时监控焊接质量，从而减少后期过程检查的需要。其他密集使用薄部件激光焊接的行业，例如制药行业，可以从所提出的过程中传感器中受益。