Methods and systems are provided for using optical interferometry in the context of material modification processes such as surgical laser or welding applications. An imaging optical source that produces imaging light. A feedback controller controls at least one processing parameter of the material modification process based on an interferometry output generated using the imaging light. A method of processing interferograms is provided based on homodyne filtering. A method of generating a record of a material modification process using an interferometry output is provided.

Methods and systems for coherent imaging and feedback control for modification of materials

A welding tool includes a first handle and a second handle. The welding tool also includes a torch nozzle holder configured to hold a nozzle of a welding torch therein, and to block the nozzle from extending therethrough. The welding tool includes a blade assembly positioned a predetermined distance from the torch nozzle holder. The blade assembly is configured to cut welding wire extending through the blade assembly to calibrate wire stickout from the welding torch to the predetermined distance.

Welding training systems and devices

EMD-based pulsed TIG welding process porosity defect detection and defect diagnosis using GA-SVM

A system and device for welding training. In one example, a welding training system includes a position detecting system configured to detect a distance between the position detecting system and objects within a field of view of the position detecting system, and to produce a map corresponding to the objects. The welding training system also includes a markers configured to be coupled to a device of the welding training system. Furthermore, the markers are configured to be detected by the position detecting system.

System and device for welding training

A system and device for welding training. In one example, a welding training system includes a display configured to show welding features related to a training welding operation. The system also includes a training workpiece having a substantially transparent weld joint configured to be placed adjacent to the display during the training welding operation. The system includes a processing device coupled to the display and configured to provide welding data relating to the training welding operation to the display. The system also includes a training torch comprising an optical sensor. The training torch is coupled to the processing device and configured to provide the processing device with data from the optical sensor corresponding to a position of the training torch relative to the training workpiece.

A welding system has: a welding mechanism, a reception laser light source, a reception optical mechanism, an interferometer, a data recording/ analysis mechanism and a data recording/ analysis mechanism. The reception laser light source generates reception laser light so as to irradiate the object to be welded with the reception laser light for the purpose of detecting a reflected ultrasonic wave obtained as a result of reflection of a transmission ultrasonic wave. The reception optical mechanism transmits, during or after welding operation, the reception laser light generated from the reception laser light source to the surface of the object to be welded for irradiation while moving, together with the welding mechanism, relative to the object to be welded and collects laser light scattered reflected at the surface of the object to be welded.

Welding system and welding method

A welding inspection method has steps of: generating transmission laser light for generating an ultrasonic wave and transmitting the transmission laser light to an object to be inspected during or after welding operation for irradiation; generating reception laser light for detecting an ultrasonic wave and transmitting the reception laser light to the object to be inspected for irradiation; collecting laser light scattered and reflected at surface of the object to be inspected; performing interference measurement of the laser light and obtaining an ultrasonic signal; and analyzing the ultrasonic signal obtained by the interference measurement. At least one of the transmission laser light generated in the transmission laser light irradiation step and the reception laser light generated in the reception laser light irradiation step is irradiated onto a welded metal part or a groove side surface.

Welding inspection method and apparatus thereof

A new approach of non-destructive testing for thick welded structural materials based on laser-ultrasonic technique is investigated. In this study, weld part of structural materials, which should be conventionally inspected after welding, is inspected during welding process in order to save time and cost of manufacturing. The laser-ultrasonic is a method to generate and detect ultrasonic signals by laser beams and has potential to be applied to remote inspection/monitoring of materials under welding at elevated temperature. Bulk longitudinal acoustic wave generated by a Q-switched Nd:YAG laser irradiation and detected as surface vibration by laser interferometer coupled with a long pulse detection laser is used to detect defects around the weld. To overcome the lack of sensitivity of laser-ultrasonic testing on thick welded part having a thickness of more than 100mm at higher temperature, we have originally developed a modified synthesis aperture focus signal processing technique (m-SAFT). The in-process testing with actual piping weld having a thickness of 150mm with high temperature more than 200 degrees C. was demonstrated. By using m-SAFT, an actual weld defect of 1.5mm in diameter at 106mm depth in the specimen was clearly observed. The measurement result well agreed with the result of conventional ultrasonic testing conducted after weld process and also the cross-sectional observation of the specimen. [doi:10.2320/matertrans.I-M2014809]

Defect Detection in Thick Weld Structure Using Welding In-Process Laser Ultrasonic Testing System

PROBLEM TO BE SOLVED: To provide a laser processing device, a laser processing system and a laser processing method, capable of cutting a thick workpiece.SOLUTION: A laser processing device 1 of an embodiment is a laser processing device for processing a processing object 2 by irradiating a laser L to the processing object 2 with a water flow W as a light guide material, and comprises: an ultrasonic vibrator 16 for preventing liquid in a cutting groove 28 generated in the processing object 2 by cutting work from staying around a liquid flow jetted in the cutting groove 28. The laser processing system 1 of an embodiment is a laser processing system for executing the cutting work by irradiating the laser L to the processing object 2 with the water flow W as the light guide material, and comprises: the staying preventive ultrasonic vibrator 16; cutting depth measuring means 18; and a control part 19 for controlling the ultrasonic vibrator 16 based on the cutting depth. A laser processing method of an embodiment is a laser processing method for executing the cutting work by irradiating the laser L to the processing object 2 with the water flow W as the light guide material, and prevents the liquid from staying around the liquid flow in the cutting groove 28 by the ultrasonic vibrator 16.

Laser processing device, laser processing system, and laser processing method

An ultrasonic flaw detector including an ultrasonic probe for emitting an ultrasonic wave on an object to be inspected and receiving a reflected ultrasonic wave from the object, a drive element control unit for controlling a plurality of ultrasonic elements to emit an ultrasonic wave from the ultrasonic probe and to control a reflected ultrasonic wave from the object, and a calculation unit for obtaining, by using a refraction angle of the ultrasonic wave at a time of the ultrasonic wave entering the object, an incident position of the ultrasonic wave on a surface of the object, and a surface shape of a surface of the object at the incident position, the incident angle of the ultrasonic wave entering the incident position, and obtaining a plurality of ultrasonic elements to be driven, based on the incident position and the incident angle.

Yamamoto Setsu

Papers

Welding system and welding method

Welding inspection method and apparatus thereof

Defect Detection in Thick Weld Structure Using Welding In-Process Laser Ultrasonic Testing System

Laser processing device, laser processing system, and laser processing method

Ultrasonic flaw detector and ultrasonic flaw detecting method