Indoor positioning is an application that has been proposed in recent years. How to use ultrasonic transducers for indoor positioning? Take a recent university experiment with the DYA-21-G ultrasonic transducer as an example, here is a brief introduction.

A ultrasonic transducer is a device that converts mechanical vibration into electrical signals or mechanical vibrations driven by an electric field. Piezoelectric polymer electroacoustic devices utilize the transverse piezoelectric effect of the polymer, while transducer design utilizes polymer piez

The ultrasonic receiver is composed of an ultrasonic transducer and a receiving circuit. In order to achieve a wide range of ultrasonic ranging, it is required not only that the ultrasonic receiving circuit can amplify the weak signal reflected from the distant target, but also that the strong signa

With regard to ultrasonic transducers, ultrasonic transmitting and receiving circuits are devices for converting electrical energy and acoustic energy. Generally, the ultrasonic transducer has low electromechanical energy efficiency, which seriously affects the working distance of the ultrasonic tra

Mainly introducing the connection mode of the ultrasonic transducer array (auxiliary receiver) output port. The next chapter studies the design problem of the receiving and transmitting circuit of the disc-type piezoelectric transducer (main transducer), The circuit-assisted receiver array consists

A physical picture of a piezoelectric disc-type transducer designed and fabricated. In order to reduce the influence of multipath noise, using the aforementioned sound field Fresnel zone, the ultrasonic transducer is slightly higher than the radiating surface (or acoustic window) of the piezoelectri

Piezoelectric disc type of transducers discuss the advantages and disadvantages of various forms of ultrasonic transducer. Considering the performance, mounting dimensions and field testing of ultrasonic ranging sensors, piezoelectric ceramic discs are selected radial/ thickness of the vibration mod

Compared with traditional two-dimensional ultrasound ultrasound piezoelectric ceramics, three-dimensional ultrasound imaging has an intuitive image display and can be accurate measurement such as volume and area, and the time is required to shorten the diagnosis of doctors.Three-dimensional ultrasou

A device for transmitting and receiving ultrasonic waves, which is called an ultrasonic transducer or ultrasonic probe; an ultrasonic transducer and transceiver circuit constitutes an ultrasonic sensor. In order to develop a large-range ultrasonic sensor, it is necessary to understand the physical p

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

In this section, two kinds of piezoelectric ceramics composite materials with a center frequency of around 50 MHz are prepared to prepare two kinds of poly. Focused ultrasonic transducers in the form of a focal point are spherical focus and cylindrical line focus, respectively. The schematic diagram

Ultrasonic transducers, what kind of pulses do they need to generate or obtain ultrasound? How to confirm the resonance frequency ?About ultrasonic transducer, the pulse required is a high-frequency pulse signal, and is determined by its driving frequency. As for the resonant frequency of the trans

The ultrasonic transducer is a sound pressure-electrical conversion device that can convert the surface acoustic energy and electrical energy.Since 1917, the French scientist Paul Langevin discovered the inverse piezoelectric effect, it is using quartz crystals as piezoelectric materials.The first p

1.When is using the piezoelectric ceramic sheet to make a buzzer, why the wire can't be soldered on the piezoelectric ceramic sheet? In addition, capacitance of the piezoelectric ceramic sheet is the same as the ceramic capacitor?The piezoelectric ceramic is used to make the buzzer. If this problem