2026-09-20T12:42:47Z https://www.ideals.illinois.edu/oai-pmh

oai:www.ideals.illinois.edu:2142/81090 2023-07-11 col_2142_5131 col_2142_8888 com_2142_5130 com_2142_8887 com_2142_234

Chang Liu Chen, Nannan 2015-09-25T20:09:33Z 2015-09-25T20:09:33Z 10000-01-01 2008 2008 This dissertation describes a new mode of hydrodynamic sensing using a micromachined artificial lateral line canal system. As a potential alternative to sonar, it offers a passive mode of detection, which could allow for the realization of stealth monitoring capabilities. An example would be for the real-time autonomous detection and tracking of underwater targets. In order to create an artificial lateral line canal, flow sensors are needed to detect the flow inside the canal. A microfabricated artificial haircell flow sensor has been developed for this purpose. The sensor utilizes a piezoresistive transduction mechanism. It consists of a silicon cantilever with doped piezoresistors at the fixed end and an out-of-plane, high-aspect-ratio SU-8 hair structure attached to the free end. The design, fabrication, theoretical modeling and experimental characterization of the sensor will be presented. The sensor exhibits good sensitivity down to the submm/s range for underwater oscillatory flow. It can also distinguish between flows from different directions. However, the sensor becomes saturated by low frequency noise under strong background flow. In order to detect disturbances under these conditions, the sensors are embedded in an artificial canal structure. The fabrication of the first prototype artificial lateral line canal device will be presented, followed by the fluid-mechanics modeling and experimental validation. Measurements conducted in running water have clearly demonstrated the advantage of using a canal structure for disturbance sensing under noisy flow conditions. Made available in DSpace on 2015-09-25T20:09:33Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 3337725.pdf: 1993787 bytes, checksum: 7ef969108f5dfbaf7e4497d7561e286f (MD5) Previous issue date: 2008 Embargo set by: Seth Robbins for item 82372 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs U of I Only 110 p. Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2008. http://hdl.handle.net/2142/81090 (MiAaPQ)AAI3337725 eng Engineering, Electronics and Electrical Artificial Lateral Line Canal System for Underwater Disturbance Sensing text Electrical and Computer Engineering Electrical and Computer Engineering University of Illinois at Urbana-Champaign Dissertation Ph.D.