Fiber-grating cultural relic weighing type antitheft alarm sensor

Abstract

The invention relates to a fiber-grating cultural relic weighing type antitheft alarm sensor comprising four pressing blocks, four cylindrical cushion blocks, two LC fiber flange interfaces, a base plate connected with a housing body, and four sensing cantilever beams pasted with fiber gratings. Free ends of the four sensing cantilever beams are respectively distributed at four corners of the base plate and are respectively connected with the four cylindrical cushion block; and fixed ends of the four sensing cantilever beams are located at the edge of the center of the base plate and are connected with the four pressing blocks arranged above the fixed ends and the base plate. Four through holes where the four cylindrical cushion blocks can slide up and down in the holes are formed in the base plate. The fiber gratings of the four sensing cantilever beams are successively connected in series; and the two ends of the series fiber grating unit are respectively connected with the two LC fiber flange interfaces. According to the invention, weighing, displaying, and on-line monitoring and antitheft alarming of important cultural relics can be realized; and the sensor has characteristics of high intrinsic safety, good anti-electromagnetic interference property, large-scale networking, low cost, high measurement precision, large range, small size, and easy assembling.

Description

Technical field: [0001] The invention relates to the technical field of sensors, in particular to a method that can not only realize the weighing, display and online monitoring of important cultural relics, but also has intrinsic safety, anti-electromagnetic interference, large-scale networking, low cost, and measurement accuracy. The fiber grating cultural relic weighing anti-theft alarm sensor is characterized by high, large measuring range, small size and easy assembly. Background technique: [0002] Cultural relics are the material relics that testify to the history, achievements and cultural life of a nation. They contain and embody the humanistic qualities that the Chinese nation has condensed during its formation and development. All cultural relics are non-renewable, and the particularity of the quantity left over determines the limitless value of the exhibits. Therefore, the protection of cultural relics is of great significance. Because cultural relics have extremely h...

AI Technical Summary

Problems solved by technology

[0005] If traditional resistive, piezoelectric and other electrical weighing sensors are used, they are susceptible to electromagnetic interference and difficult to form a network, and these sensing signals are powered and transmitted to the central computer room through cables, and the power supply line has aging problems, which brings fire hazards

[0006] Existing fiber grating load cells use bridge-type shear beams or elastic bodies with columnar structures as sensitive elements, which have the disadvantages of high cost, large volume, and low measurement accuracy. They are generally used for weighing heavy objects and are not easy to display Integrate into one, unable to meet the requirements of cultural relics weighing anti-theft alarm

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