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  • Aug
    23
    transmitting circuit of ultrasonic sensor
    At present, foreign big car companies have invested a lot of resources to develop advanced anti-collision and safety warning systems for advanced cars with GPS, but the excessive cost limits its application in ordinary cars. To this end, greatly reducing the cost of the car's active anti-collision a
  • Aug
    21
    Ultrasonic vehicle ranging sensor and its performance
    In order to facilitate the application and significance of the research topic of the large range ultrasonic ranging system in the following chapters, it is first necessary to understand the research status and development trend of the current automotive ranging sensor technology field. a brief intro
  • Aug
    21
    Multiple applications of ultrasonic distance measuring sensor
    Ultrasonic waves have beam and reflection characteristics, which can basically travel along a straight line, and their energy is much larger than the low frequency sound waves of the same amplitude. The non-contact ultrasonic ranging sensor is made by using this characteristic of ultrasonic waves. I
  • Aug
    20
    ultrasonic sensors used for sonar systems in the water
    Ultrasonic sensors for range-finding are the basis of many robotic and automaticapplications, such as obstacle avoidance and collision warning systems of cars, self-guidedautonomous vehicles, fieldwork robots and so on. However, there is specified restriction when anairborne ultrasonic transducer is
  • Aug
    20
    High power electrostatic ultrasonic distance measuring sensor
    When ultrasonic distance measurements transducers are made on the tree barriers in transmission corridors, most of the crowns in the corridors are not a smooth surface, the canopy is non-specular reflection of the signal from the ultrasonic detector, ultrasonic absorption effect is large, and the si
  • Aug
    18
    Ranging method for unmanned aerial vehicle equipped with ultrasonic transducer
    The UAV ranging transducer system described in this paper applies to the principle of ultrasonic distance measurement, and uses the measurement ultrasonic wave to transmit pulses.The time difference between the wave and the received pulse wave has the relative position is calculated by the speed at
  • Aug
    18
    The principle of drone technology and the ultrasonic ranging technology
    The principle of drone technology and ultrasonic ranging transducer demonstrates the loss feasibility of measuring the obstacles in the electrical circuit corridor; the third chapter mainly introduces the ultrasonic ranging transducer system equipment, including selection of UAV equipment parameters
  • Aug
    17
    HIFU piezo focusing function of concave surface
    Taking the simulation model of HIFU for breast tumor as a reference, establishing the additional transducer as shown in the figure .A three-dimensional simulation model of human body is fat or muscle tissue with a certain angle of sound, and is carried out in three dimensions simulation calculation,
  • Aug
    17
    Research method of HIFU treatment sound field
    At present, the methods for studying the sound field of HIFU piezo ceramic mainly include experimental measurement methods and numerical simulation methods.The methods for measuring high-intensity ultrasonic sound fields are mainly hydrophones, ultrasonic radiation balances and fiber optic sensors.t
  • Aug
    15
    Sound source and focusing method of HIFU treatment
    In the HIFU treatment, whether it is extracorporeal to shock wave lithotripsy treatment equipment or Ultrasound HIFU piezo tumor treatment equipment,Ultrasonic generation and focusing devices are the core components. At present, there are three main sources of high-intensity focused ultrasound.A dif
  • Aug
    15
    The principle of HIFU tumor treatment
    The principle of HIFU piezo ceramic tumor treatment is to concentrate the ultrasound energy into the disease tissue by a certain focusing method.due to the strong energy deposition of the focal point, makes the focal region in a short time (0.5-5s).The target tissue temperature rises above 60C, whic
  • Aug
    14
    High intensity focused ultrasound therapy
    HIFU piezo ceramic technology as a new clinical treatment method, mainly including extracorporeal shock wave lithotripsy (ESWL)therapy, HIFU tumor treatment and extracorporeal shock wave lithotripsy (ESWL) treatment technology. Extracorporeal shock wave lithotripsy is the use of ultrasound or lo
  • Aug
    14
    Piezoelectric ceramics used in the medical ultrasound
    Medical ultrasound transducer can be divided into diagnostic ultrasound and therapeutic ultrasound. Diagnostic ultrasound is ultrasonic frequency of 1 to 10 MHz.The low-energy form is applied to the clinic, mainly for the purpose of extracting biological information, and Pzt material stripe piezo ce
  • Aug
    13
    Piezoelectric material is the core of the transducer(2)
    (2) The theory of mechanical acoustic properties of l-3 typepiezoelectric resonance sensor is established by w.A smith et al.The model is simulated and the electromechanical coincidence coefficient of the thickness vibration of the piezoelectric composite material is obtained.The effects of speed, d
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