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  • 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
  • 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
  • Techniques for using ultrasonic sensors in challenging applications
    Demand is growing globally for accurate and cost-effective distance measurement capabilities in a wide range of industrial, public sector and research applications. According to research by MarketsandMarkets, ultrasonic sensors have the edge in helping organizations meet their distance measurement
  • Effects of Ultrasonics on Health
    each time the distance is doubled (i.e., every time the distance is doubled, 1/8 of the energy remains). The ultrasonic airborne energy is also absorbed into soft, non-reflecting materials (e.g., worker's clothing or noise abatement foam materials). The remaining airborne ultrasonic energy
  • Understanding Ultrasonics
    Ultrasonic signals are like audible sound waves, except the frequencies are much higher. Our ultrasonic transducers have piezoelectric crystals which resonate to a desired frequency and convert electric energy into acoustic energy and vice versa. The illustration shows how sound waves, transmitted
  • Medical Device Link .
    that require a high level of process control, an ultrasonic welder from ensures quality by allowing users to digitally program many parameters, including weld force and actuator-descent speed. The versatile 2000f ultrasonic assembly system can also adjust weld distance, time, energy, energy compensation
  • How Does a Sonicator Work? (.pdf)
    The ultrasonic electronic generator transforms AC line power to a 20KHz signal that drives a piezoelectric convertor/transducer. This electrical signal is converted by the transducer to a mechanical vibration due to the characteristics of the internal piezoelectric crystals. The vibration
  • Overview of Different Piezo Motor Design Principles
    rotary or linear motions. Methods of obtaining long moving distance. have various drive and functional principles that make these motors categorized into three groups: resonance-drive (piezoelectric ultrasonic motors), inertia-drive, and piezo-walk-drive. In this review,. a comprehensive summary

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  • Progress in Optomechatronic Technologies
    Abstract In this paper, distance values of ultrasonic distance sensor and the rotation angle values of the servo motor are used as a way of tracking the moving object.
  • Sensor technique
    … parameters, oxide-layer, 284 air flow meters installation games, combination of sensors, 885 mechanical structure, 884 micromechanical, 877 with additional sensing technology, 887 air mass measurement, thermal 868 structure, 872 evaluating circuit, sees 588 air ultrasound distance sensor 878 function principles …
  • Learning Robotics Using Python
    Working with ultrasonic distance sensors .
  • Raspberry Pi Sensors
    We have created the ultrasonic distance meter.
  • Advances in Mechanical and Electronic Engineering
    The paper presents the working principle of ultrasonic distance measurement, the structure properties of ultrasonic sensors, the ultrasonic sensors in the transmitter and receiver probe and their inter-action problem in details.
  • http://www.ndt.net/article/ultragarsas/Vol.66-No.1-2011_02-Petrauskas.pdf
    By combining the ultrasonic distance determination method with the mechanical level determination methods, very precise leveling instruments can potentially be created.
  • http://www.ndt.net/article/ultragarsas/Vol.65-No.3-2010_01-Raisutis.pdf
    The ultrasonic distance measurement in air may be performed by the time-of-flight (TOF) technique, single frequency continuous wave phase shift, two-frequency continuous wave method, combining methods of TOF and phase-shift and etc. [1-9].
  • http://eprints.hud.ac.uk/9106/1/fjaldawifinalthesis.pdf
    A high-accuracy and high-resolution ultrasonic distance measurement system has been achieved in this project by creating multi-frequency continuous wave frequency modulation (MFCWFM) system.