Patent DE-102009008034-B3 (DE)
Title: Multisensor device for detecting different process characteristics during thermal joining arc process, comprises a multisensor in the form of a miniaturized structural unit from partially cylindrical piezo foil
Inventor: GIGENGACK THOMAS
IPC: B23K9/095
Filed: 2009-02-08
Granted: 2010-08-26
Abstract: The multisensor device comprises a multisensor in the form of a miniaturized structural unit from partially cylindrical piezo foil (2) by which process noises are detected, a photodiode (3), which is connected with the piezo foil at its upper end (4) and detects light emission from the arc, a giant magnetoresistance (GMR) sensor (5), which is connected with the piezo foil at its upper end and detects magnetic signal emerging from the arc, and connections equipped to the piezo foil, the photodiode and the GMR-sensor. A shotgun is associated to the multisensor. The multisensor device comprises a multisensor in the form of a miniaturized structural unit from partially cylindrical piezo foil (2) by which process noises are detected, a photodiode (3), which is connected with the piezo foil at its upper end (4) and detects light emission from the arc, a giant magnetoresistance (GMR) sensor (5), which is connected with the piezo foil at its upper end and detects magnetic signal emerging from the arc, and connections equipped to the piezo foil, the photodiode and the GMR-sensor. A shotgun is associated to the multisensor, where airborne sound is received over lower opening of the shotgun and the light emission is received from the arc by the shotgun. The piezo foil is formed to a hollow cylinder that is covered at its upper end from the photodiode and the GMR-sensor is positioned at its external mantle (6). The miniaturized structural unit is arranged over the upper opening of the shotgun. The photodiode has a circular outline, whose diameter is similar to the diameter of the external mantle of the hollow cylinder formed by the piezo foil. A transmission filter is connected upstream to the front side of the photodiode turned to the light emission and is held in the hollow cylinder formed by the piezo foil. The photodiode and the GMR sensor are mounted at the internal mantle of the piezo foil. The miniaturized structural unit of the multisensor from the piezo foil, the photodiode and the GMR sensor are arranged within the shotgun on its upper end. The miniaturized structural unit of the multisensor is held in the shotgun in which the external mantle of the piezo foil is fixed at the internal mantle of the shotgun. The miniaturized structural unit of the multisensor is interchangeably held within the shotgun. The opening is covered at upper end of the shotgun through a removable safety cap. The shotgun has circular or oval cross-section and passes to its lower opening. The shotgun consists of plastic and is connected at its lower end with a hollow cylindrical interchangeable article resistant against heat. The article consists of aluminum. The internal mantle of the shotgun has a reflection coating. Two sections of the shotgun are connected together over a joint and extend itself in the direction of the length of the shotgun. The shotgun is formed as flexible tube-like element, whose contour is changeable over its length. The shotgun has a length of 100-150 mm and diameter of 5-10 mm. The miniaturized structural unit has a height of 30 mm. The hollow cylinder of the miniaturized structural unit formed by the piezo foil has a height of 30 mm and diameter of 20 mm. Independent claims are included for: (1) component of multisensor device; and (2) a method for inline supervision of the quality of welding seam in protective gas welding of component.