Article List
- Piezoelectric properties of common piezoelectric ceramics and piezoelectric materialsPiezoelectric ceramics are artificial polycrystalline piezoelectric materials. The crystal grains inside the material have many spontaneously polarized electric domains, which have a certain polarization direction, so that there is an electric field. When there is no external electric field, the el
- Signal conditioning of piezoelectric ultrasonic sensorsPiezoelectric sensorThe application of piezoelectric sensors for sensing and excitation extends to many areas. This article mainly introduces the induction of some physical intensities, namely acceleration, vibration, oscillation and pressure, which can be considered similar from the perspective of
- How to avoid blind spots in the field of ultrasonic sensors for reversing radar?Reversing radar, namely "reversing collision avoidance radar", also called "parking aid", is mainly composed of ultrasonic sensors (commonly known as probes), controllers and displays (or buzzers). The system adopts the principle of ultrasonic distance measurement sensor. The ultrasonic probe on the
- "Piezoelectric Ceramics" for tight materials for epidemic coronavirus prevention and controlAfter 76 days of "closing the city",Finally WuHanis unblocked on April 8th. With the efforts of the whole people, it lasted more than two months. The domestic epidemic situation can be said to have been "controlled." The overseas epidemic situation is still severe (the number of newly diagnosed over
- Parameters of piezoelectric materials and piezoelectric equations (1)First, the piezoelectric equation.For the performance of piezoelectric materials, we have the following four considerations: 1. Piezoelectric materials are elastomers, which obey Hooke's law in terms of mechanical effects, that is, the elastic relationship between stress τ and strain e: τ = ce Or e
- Relationship between welding spot and wave force of piezoelectric ceramic crystal1. What is the vibration detecting circuit of a piezoelectric ceramic crystal?The vibration detecting circuit of the piezoelectric ceramic transducer is actually not complicated, just connect the two electrodes to the oscilloscope. However, it should be noted that the voltage across the piezo cerami
-
- Features of the Leeb hardness testerFeatures of the Leeb hardness testerThe Leeb hardness tester is a rapid hardness test method. The related technology of digital ultrasonic hardness tester has made rapid progress in recent years. The measurement and accuracy of the Leeb hardness tester have been comparable to the international advan
-