| Customization: | Available |
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| Type: | High Frequency Ultrasonic Sensor |
| Output Signal Type: | Digital Type |
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| Piezoelectric Ceramic Sheet Size | Item | Unit | Parameter | ||
| Outer diameter | Inner diameter | Thickness | capacitance | pF | 2700 |
| D | d | T | Resonant frequency | Fr(kHz) | 33.1 |
| 50mm | 20mm | 6mm | Coupling coefficient | Kp(%) | 53 |
| Quality factor | Qm | 800 | |||
| Assembly performance:Need to match the circuit,it's recommended that the circuit be designed to automatically search for frequencies |
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The use of high-intensity ultrasound in machining is usually based on the application of nonlinear effects created by finite amplitude pressure changes. The most important effects of high-intensity ultrasound are: heat, cavitation, agitation, acoustic flow, interfacial instabilities, and friction, diffusion, and mechanical fracture. These effects can be used to enhance various processes such as machining, welding, metal forming and powder densification in solids; cleaning, emulsification, liquid atomization, accelerated chemical reactions, degassing, defoaming, drying, aerosol agglomeration, etc. .
A certain number of these processes have been introduced in industry, but many of them are still in the laboratory stage and have not yet been commercially developed. This may be due to problems associated with the development of proper ultrasonic power generation technology. In ultrasonic transducers for large applications, the main points to consider are power capacity, efficiency, vibration amplitude and volume to be handled.
Transducers for high power ultrasound applications are those operating in the 10 to 100 kHz range, power capabilities from hundreds of watts to several kilowatts, and large vibration amplitudes
Piezoelectric Ceramics
In modern transducers, piezoelectric materials commonly used are piezoelectric ceramics. Piezoceramics can be shown to provide the highest electromechanical conversion and efficiency, and in general, the most favorable properties for high-power ultrasonic transducers.
Piezoceramics are materials that form agglomerates of randomly oriented ferroelectric crystallites, usually derived from the solid-state reaction of several oxides, followed by high-temperature firing. After firing, the ceramic is isotropic and non-piezoelectric due to the random orientation and structure of domains (regions within each crystallite where the electric dipoles have a common orientation). Ceramic materials can be made into piezoelectric materials by a poling process that involves applying a high electric field in selected directions to switch the polar axes of the crystallites to those directions that symmetry allows, i.e. closest to the electric field strength .
Once the polarizing field is removed, the dipole will not be able to easily return to its original position, and the ceramic will now have a permanent state of polarization, and as long as its amplitude remains well below the desired strength, it will respond to the applied electric field or mechanical Pressure responds linearly. Switch the polar axis. Therefore, for these materials, polarization must be done, although it is clear that perfect dipole alignment over the field is not possible as in single crystals. The measured polarization value is a good indication of the measured polarization state.
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