Passive vibration sensing system using liquid crystals

Abhishek Srivastava

doi:10.1117/12.2680493

29 September 2023 Passive vibration sensing system using liquid crystals

Abhishek Srivastava

Proceedings Volume PC12658, Liquid Crystals XXVII; PC1265803 (2023) https://doi.org/10.1117/12.2680493
Event: SPIE Organic Photonics + Electronics, 2023, San Diego, California, United States

Abstract

The increasing demand from large-scale high-density sensing arrays also raises new requirements for sensors such as higher sensitivity, more comprehensive response range but lower cost, smaller size, etc. For example, in large-scale structure health monitoring, [1-3] a sensing array can significantly decrease the cost and effort of manpower and provide a real-time and precise diagnosis of buildings. However, the power supply of the sensing probe is a vital problem to be solved: the maintenance of batteries or energy harvesters for such a large number of sensors is a considerable challenge. Besides, the low cost of sensing array is the foundation of a large-scale high-density sensing network. When we deploy these sensors below the ground or on the seabed, the problem becomes multi-fold complicated. A passive sensing technique can be a perfect solution, which needs no additional power during energy transduction. The power supply and signal process components are removed from the passive sensing probe. Thus, the cost of the sensing array can be significantly dropped while the structural complexity is reduced, and the lifetime can be much longer. [4]

Conference Presentation

Citation Download Citation

Abhishek Srivastava "Passive vibration sensing system using liquid crystals", Proc. SPIE PC12658, Liquid Crystals XXVII, PC1265803 (29 September 2023); https://doi.org/10.1117/12.2680493

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