The technology of ultrasonically degrading organic pollutants in sewage can be used alone or by ultrasonic cavitation effect, and the ultrasonic degradation technology can be combined with other treatment technologies to degrade and remove organic pollutants. The combined technology has the followin

The vibration of the object can generate fluctuations.The mechanical wave with a frequency between 16 Hz and 20 kHz can cause human hearing. The mechanical wave in this band is called sound wave. Ultrasonic frequencies below 20 kHz are called infrasound waves, and flat frequencies above 20 kHz are c

Design of single chip circuit:Because the microcontroller integrates the watchdog, CCU comparison unit, analog comparator, A/D converter and other components, it simplifies the circuit design and saves costs.The MCU is powered by +3V and is supplied by the regulator chip HT7130. It uses a 2.4576MHz

Ultrasonic testing technology is a typical non-contact measuring method, which is based on electronics, materials science, physics, etc., and it is widely used. As a type of wave, ultrasonic transducers have all the properties of a wave. Ultrasonic testing is achieved by the physical process of ultr

A pulse (emission wave) generated by the high-frequency pulse generator is applied to the ultrasonic sensor probe to excite the piezoelectric crystal to oscillate to generate ultrasonic waves. Ultrasonic waves propagate to the inside of the workpiece at a certain speed. A part of the ultrasonic wave

One can hear that the sound is generated by the vibration of the object. Its frequency of transducer for distance is in the range of 20HZ-20KHZ, the ultrasonic wave is more than 20KHZ, and the infrasound wave is lower than 20HZ. Commonly used ultrasonic frequencies are tens of KHZ-tens of MHZ. Since

Types of Ultrasonic distance measuring sensorUltrasound has the advantages of strong directivity,which slows energy consumption and long distance of propagation. Therefore, in the transducer for distance by using sensor technology and automatic control technology, ultrasonic ranging is the most popu

Ultrasonic sensor detection technologyThe ultrasonic transducers are a piezoelectric ceramic device that realizes bidirectional conversion of mechanical energy and electrical energy through a piezoelectric effect. Its propagation speed is 344m / s (25 degrees). The operating frequency is generally b

The ultrasonic ranging system developed has a range of more than 32 meters, a beamwidth of less than 100, and a bandwidth of about 4 kHz (22-25. 5 kHz). If a combined ultrasonic transducer structure is used, the bandwidth can be extended to 8 kHz. A large-range ultrasonic ranging system composed of

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

When the axial and radial electromechanical factors of the disc-type piezoelectric vibrator are relatively strong, the one-dimensional theory established by the pure radial model or the pure thickness model is not accurate enough. Between the theoretical calculated value and the experimental value.

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

The phase estimation method of time delay estimation is a practical method to improve the accuracy of ultrasonic delay estimation. Based on the fact that for a simple harmonic, the fourier transform (DFT) can be used to calculate its fourier coefficient corresponding to the resonant frequency, and t

Work programIf a piezoelectric ceramic piece with a resonant frequency of 40 kHz in the transmitting sensor is applied (a 40 KHz high-frequency voltage is applied to the double crystal oscillator, the piezoelectric ceramic piece is elongated and shortened according to the polarity of the applied hig