초록 ▼

The present invention provides a system and method to reduce motion-induced noise in the detection of ultrasonic signals in a moving sheet or body of material. An ultrasonic signal is generated in a sheet of material and a detection laser beam is moved along the surface of the material. By moving th

The present invention provides a system and method to reduce motion-induced noise in the detection of ultrasonic signals in a moving sheet or body of material. An ultrasonic signal is generated in a sheet of material and a detection laser beam is moved along the surface of the material. By moving the detection laser in the same direction as the direction of movement of the sheet of material the amount of noise induced in the detection of the ultrasonic signal is reduced. The scanner is moved at approximately the same speed as the moving material. The system and method may be used for many applications, such in a paper making process or steel making process. The detection laser may be directed by a scanner. The movement of the scanner is synchronized with the anticipated arrival of the ultrasonic signal under the scanner. A photodetector may be used to determine when a ultrasonic pulse has been directed to the moving sheet of material so that the scanner may be synchronized the anticipated arrival of the ultrasonic signal.

대표청구항 ▼

1. A system for improving the detection of ultrasound signals in a moving body of material, comprising:a scanner for directing a laser beam onto the surface of a moving body of material, the scanner moving the laser beam along the surface of the moving body in the direction of movement of the moving

1. A system for improving the detection of ultrasound signals in a moving body of material, comprising:a scanner for directing a laser beam onto the surface of a moving body of material, the scanner moving the laser beam along the surface of the moving body in the direction of movement of the moving body; and a detection device for detecting a reflection of the laser beam from the surface of the moving body to detect the movement of an ultrasound signal in the moving body.