As the medium for transmitting information, ultrasonic is more and more important in various fields such as flaw detection, ranging, and speed measurement due to its direct and reflective properties and its characteristics that are not easily affected by external factors such as light and electromag

The ultrasonic sensor is a sensor that is developed by using the characteristics of ultrasonic waves. Ultrasonic wave is a kind of mechanical wave with a vibration frequency which is higher than that of sound waves. It is generated by the vibration of the transducer wafer under the excitation of vol

Ultrasonic distance sensor can be widely used in related fields such as level, liquid level, monitoring, robot anti-collision, various ultrasonic proximity switches and anti-theft alarms. It is reliable in the operation, easy to install, waterproof, with small angle of launch, high sensitivity and c

In the industry, the typical application of ultrasonic waves is non-destructive testing of metals and ultrasonic thickness measurement. In the past, many technologies were hindered by the inability to detect the inside of objects, and the emergence of ultrasonic sensing technology changed this situa

The main purpose of ultrasonic transducers is to measurement and alarm. The design involves more content, mainly combining the single-chip control module, ultrasonic ranging module, buzzer alarm module and 4-digit digital tube display module. The core of this design is the ultrasonic ranging module.

The technological process of piezoelectric ceramic is as follows: Ingredients - mixing and grinding - pre-sintering - secondary grinding - granulation - molding - plasticizing - sintering into porcelain - shape processing - being electrode - high pressure polarization --Aging test.1. the ingredients

The polarization of some dielectrics is very special. In a certain temperature range, their dielectric constants are not constant, but vary with field strength, and after removing the external electric field, these dielectrics are not neutral. There is residual polarization. In order to be analogous

There are three main types of piezoelectric ceramics: barium titanate (BaTiO3), raw materials are titanium dioxide, barium carbonate, barium carbonate, etc.; lead zirconate titanate (PbZrTiO3), raw materials are titanium dioxide, zirconium oxide, lead oxide, barium carbonate, antimony oxide, antimon

Piezoelectric ceramics crystals are both dielectric and anisotropic dielectrics, so the dielectric properties of piezoelectric crystals are different from those of isotropic dielectrics.The dielectric is polarized under the action of an electric field, and the polarization state is a state in which

The piezoelectric effect is that when some dielectrics are deformed by an external force in a certain direction, polarization occurs inside, and positive and negative opposite charges appear on the two opposite surfaces thereof. When the external force is removed, it will return to the uncharged sta

Through the impedance test of the piezoelectric ceramic device, the model parameters and resonant frequency of the piezoelectric oscillator equivalent circuit can be obtained. Through the measurement and analysis of the electrical parameters such as capacitance value, temperature stability, insulati

1. Hysteresis characteristics of piezoelectric ceramics: The difference between the step-up and step-down displacement curves of the same piezoelectric ceramic, and the difference in displacement is called hysteresis. 2. Nonlinearity characteristics of piezoelectric ceramics: The input voltage of pi

(1)Oil bath polarization methodThe oil bath polarization method is a method in which a product such as methyl silicone oil is used as an insulating medium to polarize a product under a certain polarization electric field, temperature and time. Due to the wide temperature range, high dielectric stren

Whether the polarization process of piezo ceramic is sufficient or not has a great influence on the material properties. Therefore, it is necessary to reasonably select the polarization conditions, the polarization electric field, the polarization temperature and the polarization time, which are ref