Design of a Novel Encapsulation Based on Hair Cell Vector Hydrophone

Abstract:

According to sensitive structure of vector hydrophone which imitates fish lateral line cells, a novel encapsulation of polyurethane is proposed, that is, using polyurethane, the same material as sound-transparent cap, instead of castor oil to package. It is desirable that the novel encapsulation may effectively solve the problem of vector hydrophone’s low sensitivity. On the basis of analysis theoretical model of sound-transparent cap’s three layer mediums, this paper simulated the whole encapsulation structure by ANSYS. It can be concluded that the sensitivity is 0.267mV/Pa, resonance frequency is 1151.37 Hz. Finally, the prototype of the vector hydrophone was fabricated and preliminary characterization tests of the hydrophone were performed. Results show that the novel encapsulation hydrophone possesses satisfactory directional pattern and the free-field voltage sensitivity is -188.9 dB, which is 8.8dB higher than castor oil encapsulation.

• Periodical: Advanced Materials Research (Volumes 403-408)
• Pages: 4373-4379
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.403-408.4373
• Online since: November 2011
• Authors: Jiao Xu, Guo Jun Zhang, Gui Xiong Shi, Xi Bao Liu, Wen Dong Zhang
• Keywords: ANSYS, Hair Cell, Micro-Electromechanical System (MEMS), Polyurethane Encapsulation, Vector Hydrophone

References

[1] Baar J V, Dijkstra M, Wiegerink R, et a1. Ar- rays of cricket-inspired sensory hairs with ca- pacitive motion detection [C]/ Proceedings of the IEEE International Conference on Micro- Eletro Mechanical systems(MEMS). Miami B- each, USA, 2005: 646-649.

DOI: 10.1109/memsys.2005.1454012

[2] Chen N. Chen J. Liu C, Development and characterization of high sensitivity bioinspired artificial haireell sensor[C]/The 12th solid st- ate sensors, Actuator, and Micro-systems Work- shop. Hilton Head Island, USA, (2006).

[3] Lijie Chen. The Study of minisize vector hydrophone[D]: [Dissertation for the Degree of D. Eng]. Harbin: Harbin Engineering University.

[4] Krijnen G J M. Dijkstra M. MEMS based hair flow-sensors as model systems for acou- stic perce-ption studies [J]. Nano technology, 2006, 17: S84-S89.

[5] Dijkgraaf S. The functioning and significa- nce of the lateralline organs[J]. Biol Rev, 1963, 38: 51-105.

[6] Jielof R. Spoor A V, et al. The microphonic a- ctivity of the lateral line [J]. Physiol, 1952, 11 6: 137-157.

DOI: 10.1113/jphysiol.1952.sp004695

[7] Sand O. The lateral line and sound receptio- n[C]/Tavolga W N, Popper A N, Fay R R. Hea- ring and Sound Communication in Fishes, Ne- w York : Springer-Verlag, 1981: 459-480.

DOI: 10.1007/978-1-4615-7186-5_23

[8] Guojun Zhang, Shan Chen, Chenyang Xue, et al. Bionic Encapsulation of a Hair Cell Vector Hydrophone Based on MEMS[J]. Nanotechnology and Precision Engineering, 2009, 7(3): 224-225.

[9] Shan Chen. Research of MEMS Bionic Vector Hydrophone based on Silicon[D]: [Dissertation for the Degree of M. Eng]. Taiyuan: North University of China, (2008).

[10] Boston University, Berlin: ASA/EAA/DAGA' 99 Meeting Lay Language Papers. (1999).

[11] H.L.W. Chan, S.T. Lau, K.W. Kwok, Q.Q. Zhang, Q.F. Zhou and C.L. Choy, Sensors and Actuators A. 75(1999)252-256.

DOI: 10.1016/s0924-4247(99)00076-x

[12] Z.F. Wang, Y.M. Hu, Z. Meng and M. Ni, CHIN. PHYS. LETT. 25(2008)1606-1608.

[13] Gonghuan Du, Zhemin Zhu, Xiufang Gong. Acoustics foundation[M]. Nanjing: Nanjing University Press, 2001: 192-196.

[14] Kejie Li. New Handbook of Sensor Technology[M]. Beijing: National Defence Industrial Press, (2002).