Bimorph

About: Bimorph is a research topic. Over the lifetime, 3339 publications have been published within this topic receiving 51880 citations.

Cooled and uncooled single-channel deformable mirrors for industrial laser systems

Abstract: A study was made of bimorph mirrors intended for industrial laser systems. The technical characteristics of cooled single-channel deformable mirrors were investigated in detail. Preliminary tests were made on uncooled bimorph mirrors in industrial laser systems based on a cw CO2 laser with an output power in excess of 2 kW and on a pulsed copper vapour laser with an average power of 35 W.

Solution modification of a piezoelectric bimorph cantilever under loads

Abstract: Most of the previous investigations on the static performances of piezoelectric bimorph cantilevers are based on the elementary theory of piezo-elasticity. In fact, one fundamental problem has not ...

Piezoelectric bimorph element

Abstract: PURPOSE:To obtain the bimorph element, performance characteristics thereof for a prolonged term under high tension per a piezoelectric ceramic element unit are excellent, by using piezoelectric ceramics, coercive electric fields thereof differ mutually, as the elements when the piezoelectric bimorph element is manufactured by pasting the two piezoelectric ceramic elements together. CONSTITUTION:A piezoelectric bimorph element is constituted by pasting two piezoelectric elements 1 and 2 together. In the constitution, a Pb(TiZr)O3 group element with breakdown electric field 250V/mm. and a comparatively high piezoelectric modulus m/V in used as the element 1, and an element, which belongs to the same Pb(TiZr)O3 group but the coercive electric field thereof is 1,000V/mm., is employed as the element 2. These elements 1 and 2 are pasted together by using denatured acrylate adhesives while holdg a metallic intermediate electrode plate 3. The elements are immersed in silicone oil elevated to 90-100 deg.C, 4kV/mm. DC voltage is applied in the thickness direction, and polarization treatment is executed so that the directions of polarization are made equal. According to such constitution, negative potential is applied to the electrode plate 3 and positive potential to the elements 1 and 2.

Novel microactuators based on a photo-thermo-mechanical actuation strategy

Abstract: In this work an innovative actuation strategy based on a photo-thermo-mechanical energy conversion is presented. The actuation energy is typically higher than those required by the control and/or signal processing electronics, therefore this means a significant stress for the power supply. This challenge is particularly important if autonomous systems are taken into account. Small batteries don't ensure sufficient autonomy, therefore external energy source should be considered. The basic idea is to provide the actuation energy to system through a light source, by directly exploiting the heat generation capability of the light. The truly innovative idea in this work is the use of micro-lenses coupled with thermal actuators to gain efficiency. The device presented here is a bimorph cantilever-beam that can be realized in any standard Si-technology. Few additional steps are required for the fabrication of the micro-lenses, commonly used for micro-optics and opto-electronics. In contrast to other off-chip power supply approaches, the one presented here does not require any structured environment or exotic materials.

Piezoelectric energy droplet harvesting and modeling

Abstract: Vibrational harvested energy using piezoelectric cantilevers provides sufficient output for small power applications. This work reports on free falling droplet energy harvesting using piezoelectric cantilevers. The harvester incorporates a bimorph cantilever that composite of two layers of lead zirconate titanate (PZT) materials. During the drop impact a transfer of kinetic energy from the drop to the piezoelectric cantilever occurs in the form of mechanical stress forcing the piezoelectric structure to vibrate. Experimental results show an instantaneous water droplet power of around 2.15 mWcm3g−1, i.e. this is 37 times higher than what previously has been reported.