Messages

System For Transmitting Ultrasonic Waves

1996-7-23 · A wireless communication system undetectable by radio frequency methods for converting audio signals, including human voice, to electronic signals in the ultrasonic frequency range, transmitting the ultrasonic signal by way of acoustical pressure waves across a carrier medium, including gases, liquids, or solids, and reconverting the ultrasonic acoustical pressure waves back to the original

  • Ultrasonic Speech Translator And Communications

    1996-7-23 · A wireless communication system undetectable by radio frequency methods for converting audio signals, including human voice, to electronic signals in the ultrasonic frequency range, transmitting the ultrasonic signal by way of acoustical pressure waves across a carrier medium, including gases, liquids, or solids, and reconverting the ultrasonic acoustical pressure waves back to the original

    Get Price
  • Tomographic Imaging Using Multi Channel Low

    2016-4-1 · The first imaging system, the reflection-tomographic FLEXUS system for concrete evaluation, In the ultrasonic case, ultrasonic transducers both illuminate the volume by transmitting ultrasonic waves and also receive the transmitted or reflected waves. The aperture is sampled Ultrasonic waves are diffracted and scattered at obstacles in

    Get Price
  • Ultrasonic Navigation System For The Visually Impaired ..

    2015-2-10 · Ultrasonic Sensor is the proposed electronic aid which senses the obstacles in its path by continuously transmitting the ultrasonic waves. When an obstacle appears in its vicinity then the ultrasonic waves gets reflected to the system immediately. And then ultrasonic receiver senses these ultrasonic waves. This method

    Get Price
  • Ultrasonic Based Distance Measurement System News

    2012-5-25 · The report details the implementation of distance measurement system using the ultrasonic waves. As the human ear’s audible perception range is 20 Hz to 20 kHz, it is insensitive to ultrasonic waves, and hence the ultrasound waves can be used for applications in industries/vehicles without hindering human activity.

    Get Price
  • Sonar Fish Detection And Measurement System With

    2019-4-19 · An active sonar system is an apparatus used for obtaining information about underwater objects and events by transmitting sound waves and observing the return echoes1 The sound waves produced by sonar systems used for fish detection and biomass estimation are of the same nature as those produced by musical instruments, moving

    Get Price
  • Low Power, Low Rate Ultrasonic Communications

    Request PDF on ResearchGate | Low-Power, Low-Rate Ultrasonic Communications System Transmitting Axially Along a Cylindrical Pipe Using Transverse Waves | Acoustic-electric channels have been used

    Get Price
  • DAMAS 2011 Aleksander Kural Word Corrected IOPscience

    Operating across a 25 mm steel wall. This system achieved a 10 mW power transmission (0.25 % efficiency) and a 1 Mb/s data transmission rate. The authors expect that the power transmission efficiency can be increased to 1 %. While ultrasonic power transmission using Lamb waves has not been attempted before, these type

    Get Price
  • Information Transmission Through Solids Using Ultrasound

    2018-10-10 · To use ultrasonic signal as the information carrier, the system must be able to transfer energy between electrical signal and mechanical elastic waves. This is done by using ultrasonic transducers. An ultrasonic transducer is designed to convert electrical energy into ultrasonic elastic waves and vice versa.

    Get Price
  • Technology | Ubeam

    UBeam’s unique technology and underlying physics uses inaudible sound waves to transfer energy over the air. With a carefully chosen operating frequency and a much shorter wavelength than RF, uBeam’s ultrasound can focus the energy onto a much smaller target and therefore achieve higher power density.

    Get Price
  • Ultrasonic Speech Translator And Communications

    1996-1-1 · A wireless communication system undetectable by radio frequency methods for converting audio signals, including human voice, to electronic signals in the ultrasonic frequency range, transmitting the ultrasonic signal by way of acoustical pressure waves across a carrier medium, including gases, liquids, or solids, and reconverting the ultrasonic acoustical pressure waves back to the original

    Get Price
  • Ultrasonic Range Finder With ATtiny817 Hardware User

    2017-8-30 · ultrasonic waves (the time between transmitting an ultrasonic burst and receiving its reflection). This document instructs the user on how to use the Ultrasonic Range Finder Field Engagement Board. The board uses core independent peripherals of ATtiny817 to measure the wave's travel time. The design

    Get Price
  • Low Power, Low Rate Ultrasonic Communications

    Request PDF on ResearchGate | Low-Power, Low-Rate Ultrasonic Communications System Transmitting Axially Along a Cylindrical Pipe Using Transverse Waves | Acoustic-electric channels have been used

    Get Price
  • US Patent For Ultrasonic Wave Transmitting System

    Apparatus for controlling the angular direction of wave transmission of an ultrasonic transmitting system having a plurality of uniformly spaced transducers which includes means for successively shifting the phase of the signals emitted by each transducer and providing means for controlling the magnitude of the phase shift to alter the angle of transmission.

    Get Price
  • Fundamentals Of Ultrasonic Inspection

    2018-9-4 · A transmitting transducer (probe or search unit) that can be a single element or an array that emits a beam of ultrasonic waves when bursts of voltage are applied to it A couplant to transfer the input energy in the beam of ultrasonic waves from the transmitting transducer to the testpiece A couplant to transfer the output ultrasonic

    Get Price
  • Transmitting Data Through Steel Schneier On Security

    2011-3-24 · Transmitting Data Through Steel. How many watts are in ultrasonic sound waves? I'm assuming it's fairly material-independent, but that recapturing wattage from a solid is much easier than from a fluid. What I would like to do is to build a system for transmitting data using scalar waves (such as shown in eg books and kits by Konstantin

    Get Price
  • US Patent For Ultrasonic Wave Transmitting System

    Apparatus for controlling the angular direction of wave transmission of an ultrasonic transmitting system having a plurality of uniformly spaced transducers which includes means for successively shifting the phase of the signals emitted by each transducer and providing means for controlling the magnitude of the phase shift to alter the angle of transmission.

    Get Price
  • Transmitting Performance Evaluation Of ASICs For CMUT ..

    2017-8-28 · elements, a transmitting circuit (Tx) and a receiving circuit (Rx), Fig. 1. In transmitting mode, the Tx drives the transducer elements with high-voltage signals to generate the ultrasonic waves. In receiving mode, the transducers capture the reflected ultrasonic waves inducing electrical signals that are condi-tioned by the Rx circuit. The Q

    Get Price
  • 1 0 1 Microcomputer For Indoor Positioning System Using ..

    2017-8-9 · ultrasonic waves have been employed for the IPS tolerant to noise [5]. Fig. 1 shows the schematic drawing of the proposed positioning system which is applied to a square room with dimensions of 4.0 m × 4.0 m × 2.6 m. In this system, SS ultrasonic waves are transmitted from four ultrasonic

    Get Price
  • Ultrasonic Sensor Symmetron

    2014-5-28 · An ultrasonic sensor transmit ultrasonic waves into the air and detects reflected waves from an object. There are many applications for ultrasonic sensors, such as in Transmitting and Receiving Circuits ..09 3. Applications for Distance

    Get Price
  • Multiple Frequency Ultrasonic Imaging By Transmitting ..

    Multiple-frequency ultrasonic imaging by transmitting pulsed waves of two frequencies. it was found that the influence of the Doppler effect was small enough that almost all the secondary waves were attributable to the nonlinear propagation of sounds. Saito S, Ohya A. Development of an ultra-broadband ultrasonic imaging system

    Get Price
  • Ultrasonic Testing For Compacted Clayey Soils Cal Poly

    2018-5-12 · Ultrasonic Testing for Compacted Clayey Soils . Nazli Yesiller . Gokhan Ind P-wave transducers, (2) pulser-receiver, and (3) data acquisition system (Fig. I). Two transducers are used for measurements, one transducer for transmitting ultrasonic waves, the other for receiving ultrasonic waves that travel through the test sample. The

    Get Price
  • Ultrasonic Module And Ultrasonic Diagnostic System ..

    1998-6-2 · There is provided an ultrasonic diagnostic system in which an ultrasonic probe is detachably connected thereto, and ultrasonic waves are transmitted from the ultrasonic probe into the subject to obtain received signals through receiving the ultrasonic waves reflected within the subject, thereby displaying for a diagnosis an image carrying information based on the received signals, and is also

    Get Price
  • Real Time Wireless Flood Monitoring System Using ..

    2018-9-26 · In this project we will use the concepts of the ultrasonic waves. An ultrasonic level or sensing system requires no contact with the target. For many processes in the medical, pharmaceutical, military and general industries this is an advantage over inline sensors that may contaminate the liquids inside a vessel or tube or that may be clogged

    Get Price
  • “Sound Of Silence”: A Secure Indoor Wireless Ultrasonic ..

    2014-10-10 · WENTAO JIANG “Sound of silence”: a secure indoor wireless ultrasonic communication system mance. Hence, we need to design a smarter scheme to deliver ultrasonic Wi-Fi. My work has focused on making the most efficient sound transmission scheme against the difficul-

    Get Price
  • Multiple Frequency Ultrasonic Imaging By Transmitting ..

    Multiple-frequency ultrasonic imaging by transmitting pulsed waves of two frequencies. it was found that the influence of the Doppler effect was small enough that almost all the secondary waves were attributable to the nonlinear propagation of sounds. Saito S, Ohya A. Development of an ultra-broadband ultrasonic imaging system

    Get Price