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  • Sensor Sense: Ultrasonic Double-Sheet Detectors
    Ultrasonic double-sheet detectors distinguish between single and double sheets of paper, plastic, or metal foils to prevent waste or machine damage. The sensor operates by beaming ultrasonic sound waves through the material from one side and measuring the intensity of the sound detected
  • Sensor Sense: Ultrasonic Double-Sheet Detectors
    Ultrasonic double-sheet detectors distinguish between single and double sheets of paper, plastic, or metal foils to prevent waste or machine damage. The sensor operates by beaming ultrasonic sound waves through the material from one side and measuring the intensity of the sound detected
  • Ultrasonic sensors
    Ultrasonic sensors can measure distance without contact. Typical ultrasonic sensors emit highfrequency sound waves that are reflected by the target. A target in the path of the sound wave reflects the sound back to the sensor where it is detected, triggering the sensor output. Special programmable
  • Ultrasonic Primer: The Theory Behind Ultrasonic Cleaning
    of cavitation produced. Ultrasonic energy, like any sound wave, is a series of pressure points, or rather a series of compressions and rarefactions (see figure below). If the sound energy is of sufficient intensity, the liquid will actually be pulled apart at the rarefaction stage and small bubbles
  • Checklist for Superior Ultrasonic Cleaning
    Ultrasonic cleaning is a result of sound waves introduced into a cleaning liquid by means of a series of mounted to the cleaning tank. The sound travels throughout the tank and creates waves of compression and expansion in the liquid. In the compression wave, the molecules of the cleaning liquid
  • Ultrasonic Sensors, The Silent Laborers
    During operation the transducer alternates continuously between transmitting and receiving. If the transmitted switch packets encounter an object the sound is reflected and a small part of the energy is reflected back to the sensor, respectively the transducer. The output of the sensor reacts after
  • Delay Time Measurement with Ultrasonic Sensors
    Many industrial ultrasonic sensors are based on the delay time measurement. As has been mentioned in the introduction, the "measurement representation" thereby is the propagation velocity of the sound in the air, which is 330 m/s under normal conditions. The sensors utilized for these functions
  • How Ultrasonic Flowmeters Work (.pdf)
    In 1842, Christian Doppler discovered that a stationary observer perceives a sound to have. shorter wavelengths as its source approaches, longer wavelengths as its source recedes. The Doppler effect explains why one hears rising pitch in the blowing horn of an approaching car. When the car zooms

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