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  • Ultrasonic sensors
    of most animals. typically operate in one of two ways: reflection and thru-beam. Reflection is the most common method of ultrasonic sensing. Targets reflect sound waves back to receivers in the sensors as an echo. The receiver detects the reflected sound waves and activates the sensor output
  • Arbitrary Ultrasonic Generator
    Ultrasonic generation pulses must be varied to accommodate different types of ultrasonic transducers. General-purpose highly damped contact transducers are usually excited by a wideband, spike-like pulse that is provided by many common pulser/receiver units. Lightly damped transducers, used
  • Switch Tips: Ultrasonic level switches
    Ultrasonic switches transmit a signal in the range of a few megahertz to a receiver across a gap. The signal attenuates severely when passing through air, but the presence of liquid greatly enhances transmission. Thus signal strength of the ultrasonic burst serves as the sensing mechanism. Upon
  • Delay Time Measurement with Ultrasonic Sensors
    the transducer is designed as transmitter (ultrasonic generator) as well as receiver (microphone with high sensitivity) and is optimized for frequencies in the range of 120 kHz up to 400 kHz, far beyond the human hearing capacity. Activated by an oscillator the membrane of the transducer decouples ultrasonic
  • Sensor Sense: Ultrasonic Double-Sheet Detectors
    on the other side. Technically speaking, double-sheet detectors are thru-beam sensors with separate emitters and receivers. The emitter sends the ultrasonic sound wave while the receiver senses the amount of sound received. With no sheet present the receiver hears almost 100% of the signal. A single sheet
  • Application Considerations in Specifying High Frequency Ultrasonic Transducers
    Advances in transducer manufacturing technology and associated instrument electronics have led to the introduction of commercial products that provide the capability for ultrasonic imaging, thickness gaging, flaw detection, and material analysis at test frequencies greater than 50 MHz. In many
  • Medical Device Link .
    destructive and nondestructive test methods. In the past, nondestructive package testing methods tended to be time consuming, and the equipment was expensive and complicated to use. Today, suppliers are offering better solutions, and device manufacturers are taking heed. Traditional ultrasonic

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