piezoelectric film

The exhibit consists of two sets of piezoelectric material turntable devices. Rotate the wheel on the left to drive the disc to rotate, and the light bead will be illuminated, resulting in a fluctuating line pattern on the screen. This is because rotating the wheel on the right will generate current and light up the light bulb. At the same time, the piezoelectric film will deform when passing through three question marks. When a piece of piezoelectric film is stretched or bent, an electrical signal will be generated between the upper and lower electrode surfaces of the film. Due to the continuous contact of the triangular turntable with the piezoelectric film, a continuous electrical signal will be generated. After the oscilloscope receives the electrical signal, it will be transformed into a visible image. Piezoelectric materials are functional materials that enable the mutual conversion of mechanical energy and electrical energy. They play an important role in functional conversion devices such as electrical, magnetic, acoustic, optical, thermal, moisture, gas, and force. Target audience: Adolescents aged 6-15. Display format: Electromechanical interactive device operation instructions (audience experience) 1 Turn the handwheel and watch the light bulb turn on.

Interaction type: Electromechanical interactive. The unit is designed for unsupervised public use: controls are recessed or shielded, moving parts are enclosed, and the interface is operable by a child of about six with no instruction. Where a screen is used, the language can be switched without changing the hardware, and the content can be replaced on site.

Piezoelectric thin films belong to organic piezoelectric materials, also known as piezoelectric polymers, such as polyvinylidene fluoride (PVDF). Compared with piezoelectric ceramics and piezoelectric crystals, piezoelectric polymers have the advantages of flexibility, low density, low impedance, and high voltage constant, which have attracted worldwide attention and developed rapidly. Nowadays, they have been applied in underwater acoustic ultrasonic measurement, pressure sensing, ignition and detonation, and occupy a unique position in devices. When a piezoelectric polyvinylidene fluoride (PVDF) polymer film (piezoelectric thin film) is stretched or bent, an electrical signal (charge or voltage) is generated between the upper and lower electrode surfaces of the film, which is proportional to the shape of the stretched or bent film. Generally, piezoelectric materials are sensitive to pressure, but for piezoelectric films, when a small force is applied longitudinally, a large stress (force per unit area) is generated laterally. However, if.