G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
G01S1/72—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using ultrasonic, sonic or infrasonic waves
Landscapes
Engineering & Computer Science
(AREA)
Computer Networks & Wireless Communication
(AREA)
Physics & Mathematics
(AREA)
General Physics & Mathematics
(AREA)
Radar, Positioning & Navigation
(AREA)
Remote Sensing
(AREA)
Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves
(AREA)
Verfahren zur zerstörungsfreien feststellung von zumindest einem punkt einer rissebildungsvorderseite in einem werkstück und vorrichtung zur durchführung desselben