Device for measuring deformation quantity of electrostrictive material based on Fabry-Perot cavity

Abstract

The invention relates to a device for measuring deformation quantity of an electrostrictive material based on a Fabry-Perot cavity. The device comprises a base and a ball screw; the ball screw and a guide rail are vertically fixed to the base and connected through a sliding block. The fixed ball screw is connected with a lifting controller through a stepping motor; a material test bench is arranged on the base; a material clamp is arranged above the material test bench; an optical probe is fixed on a connecting plate through a fixing device and is connected with an external leading-out opticalfiber, and the end surface of the optical probe faces the surface of a fixed piezoelectric film; an optical signal emitted by a laser light source is processed to form parallel light, the optical signal is incident to the piezoelectric film through the optical fiber and reflected on the upper surface of the piezoelectric film, the optical signal is transmitted to an optical demodulation system through the optical fiber, and deformation generated on the piezoelectric film is sensed through change of an optical phase. The device has the advantages of high measurement precision, simple structure, strong anti-interference capability, high response speed and small size.

Description

technical field [0001] The invention belongs to the technical field of optical fiber sensing, and in particular relates to a measuring device based on the deformation of an electrostrictive material based on a Fappel cavity. Background technique [0002] With the vigorous development of modern science and technology, more and more objects need to be controlled by using electrostrictive materials to produce micro-deformation (micron or even nano-scale), and the requirements for control precision are also getting higher and higher. Due to their excellent chemical, physical and mechanical properties, electrostrictive materials play an important role in aerospace, intelligent robots, microelectronics, artificial muscles, power systems and other fields. Such materials can produce small deformations under the condition of electricity, and convert electrical energy into mechanical energy, thereby realizing energy conversion. Therefore, the exploration and application of electrostr...

AI Technical Summary

Problems solved by technology

Although these methods can accurately measure the deformation of electrostrictive materials in real time, they are bulky and easily limited by the operating level and installation environment conditions; The method has the advantages of fast speed, but this method has the problems of small measurement range and low measurement efficiency; the optical lever method has the advantages of large measurement range and fast point collection speed, but it has the problems of complex structure and poor measurement stability

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